[PATCH v9 00/11] KASAN for powerpc/32

[PATCH v9 00/11] KASAN for powerpc/32

[Christophe Leroy]

This series adds KASAN support to powerpc/32

Tested on nohash/32 (8xx) and book3s/32 (mpc832x ie 603).
Boot tested on qemu mac99

Changes in v9:
- Fixed fixmap IMMR alignment issue on 8xx with KASAN enabled.
- Set up final shadow page tables before switching to the final hash table on hash32
- Using PAGE_READONLY instead of PAGE_KERNEL_RO on hash32
- Use flash_tlb_kernel_range() instead of flash_tlb_mm() which doesn't work for kernel on some subarches.
- use __set_pte_at() instead of pte_update() to install final page tables

Changes in v8:
- Fixed circular issue between pgtable.h and fixmap.h
- Added missing includes in ppc64 string files
- Fixed kasan string related macro names for ppc64.
- Fixed most checkpatch messages
- build tested on kisskb (http://kisskb.ellerman.id.au/kisskb/head/6e65827de2fe71d21682dafd9084ed2cc6e06d4f/)
- moved CONFIG_KASAN_SHADOW_OFFSET in Kconfig.debug

Changes in v7:
- split in several smaller patches
- prom_init now has its own string functions
- full deactivation of powerpc-optimised string functions when KASAN is active
- shadow area now at a fixed place on very top of kernel virtual space.
- Early static hash table for hash book3s/32.
- Full support of both inline and outline instrumentation for both hash and nohash ppc32
- Earlier full activation of kasan.

Changes in v6:
- Fixed oops on module loading (due to access to RO shadow zero area).
- Added support for hash book3s/32, thanks to Daniel's patch to differ KASAN activation.
- Reworked handling of optimised string functions (dedicated patch for it)
- Reordered some files to ease adding of book3e/64 support.

Changes in v5:
- Added KASAN_SHADOW_OFFSET in Makefile, otherwise we fallback to KASAN_MINIMAL
and some stuff like stack instrumentation is not performed
- Moved calls to kasan_early_init() in head.S because stack instrumentation
in machine_init was performed before the call to kasan_early_init()
- Mapping kasan_early_shadow_page RW in kasan_early_init() and
remaping RO later in kasan_init()
- Allocating a big memblock() for shadow area, falling back to PAGE_SIZE blocks in case of failure.

Changes in v4:
- Comments from Andrey (DISABLE_BRANCH_PROFILING, Activation of reports)
- Proper initialisation of shadow area in kasan_init()
- Panic in case Hash table is required.
- Added comments in patch one to explain why *t = *s becomes memcpy(t, s, ...)
- Call of kasan_init_tags()

Changes in v3:
- Removed the printk() in kasan_early_init() to avoid build failure (see https://github.com/linuxppc/issues/issues/218)
- Added necessary changes in asm/book3s/32/pgtable.h to get it work on powerpc 603 family
- Added a few KASAN_SANITIZE_xxx.o := n to successfully boot on powerpc 603 family

Changes in v2:
- Rebased.
- Using __set_pte_at() to build the early table.
- Worked around and got rid of the patch adding asm/page.h in asm/pgtable-types.h
    ==> might be fixed independently but not needed for this serie.

Christophe Leroy (11):
  powerpc/32: Move early_init() in a separate file
  powerpc: prepare string/mem functions for KASAN
  powerpc/prom_init: don't use string functions from lib/
  powerpc/mm: don't use direct assignation during early boot.
  powerpc/32: use memset() instead of memset_io() to zero BSS
  powerpc/32: make KVIRT_TOP dependent on FIXMAP_START
  powerpc/32: prepare shadow area for KASAN
  powerpc: disable KASAN instrumentation on early/critical files.
  powerpc/32: Add KASAN support
  powerpc/32s: move hash code patching out of MMU_init_hw()
  powerpc/32s: set up an early static hash table for KASAN.

 arch/powerpc/Kconfig                         |   1 +
 arch/powerpc/Kconfig.debug                   |   5 +
 arch/powerpc/include/asm/book3s/32/pgtable.h |  13 +-
 arch/powerpc/include/asm/fixmap.h            |   5 +
 arch/powerpc/include/asm/kasan.h             |  39 +++++
 arch/powerpc/include/asm/nohash/32/pgtable.h |  13 +-
 arch/powerpc/include/asm/string.h            |  32 +++-
 arch/powerpc/kernel/Makefile                 |  14 +-
 arch/powerpc/kernel/cputable.c               |  13 +-
 arch/powerpc/kernel/early_32.c               |  36 +++++
 arch/powerpc/kernel/head_32.S                |  49 ++++--
 arch/powerpc/kernel/head_40x.S               |   3 +
 arch/powerpc/kernel/head_44x.S               |   3 +
 arch/powerpc/kernel/head_8xx.S               |   3 +
 arch/powerpc/kernel/head_fsl_booke.S         |   3 +
 arch/powerpc/kernel/prom_init.c              | 213 +++++++++++++++++++++------
 arch/powerpc/kernel/prom_init_check.sh       |  12 +-
 arch/powerpc/kernel/setup-common.c           |   3 +
 arch/powerpc/kernel/setup_32.c               |  28 ----
 arch/powerpc/lib/Makefile                    |  19 ++-
 arch/powerpc/lib/copy_32.S                   |  15 +-
 arch/powerpc/lib/mem_64.S                    |  11 +-
 arch/powerpc/lib/memcpy_64.S                 |   5 +-
 arch/powerpc/mm/Makefile                     |   7 +
 arch/powerpc/mm/kasan/Makefile               |   5 +
 arch/powerpc/mm/kasan/kasan_init_32.c        | 189 ++++++++++++++++++++++++
 arch/powerpc/mm/mem.c                        |   4 +
 arch/powerpc/mm/mmu_decl.h                   |   2 +
 arch/powerpc/mm/ppc_mmu_32.c                 |  36 +++--
 arch/powerpc/mm/ptdump/ptdump.c              |   8 +
 arch/powerpc/platforms/powermac/Makefile     |   6 +
 arch/powerpc/purgatory/Makefile              |   3 +
 arch/powerpc/xmon/Makefile                   |   1 +
 33 files changed, 676 insertions(+), 123 deletions(-)
 create mode 100644 arch/powerpc/include/asm/kasan.h
 create mode 100644 arch/powerpc/kernel/early_32.c
 create mode 100644 arch/powerpc/mm/kasan/Makefile
 create mode 100644 arch/powerpc/mm/kasan/kasan_init_32.c

-- 
2.13.3

[PATCH v9 00/11] KASAN for powerpc/32

[Christophe Leroy]

This series adds KASAN support to powerpc/32

Tested on nohash/32 (8xx) and book3s/32 (mpc832x ie 603).
Boot tested on qemu mac99

Changes in v9:
- Fixed fixmap IMMR alignment issue on 8xx with KASAN enabled.
- Set up final shadow page tables before switching to the final hash table on hash32
- Using PAGE_READONLY instead of PAGE_KERNEL_RO on hash32
- Use flash_tlb_kernel_range() instead of flash_tlb_mm() which doesn't work for kernel on some subarches.
- use __set_pte_at() instead of pte_update() to install final page tables

Changes in v8:
- Fixed circular issue between pgtable.h and fixmap.h
- Added missing includes in ppc64 string files
- Fixed kasan string related macro names for ppc64.
- Fixed most checkpatch messages
- build tested on kisskb (http://kisskb.ellerman.id.au/kisskb/head/6e65827de2fe71d21682dafd9084ed2cc6e06d4f/)
- moved CONFIG_KASAN_SHADOW_OFFSET in Kconfig.debug

Changes in v7:
- split in several smaller patches
- prom_init now has its own string functions
- full deactivation of powerpc-optimised string functions when KASAN is active
- shadow area now at a fixed place on very top of kernel virtual space.
- Early static hash table for hash book3s/32.
- Full support of both inline and outline instrumentation for both hash and nohash ppc32
- Earlier full activation of kasan.

Changes in v6:
- Fixed oops on module loading (due to access to RO shadow zero area).
- Added support for hash book3s/32, thanks to Daniel's patch to differ KASAN activation.
- Reworked handling of optimised string functions (dedicated patch for it)
- Reordered some files to ease adding of book3e/64 support.

Changes in v5:
- Added KASAN_SHADOW_OFFSET in Makefile, otherwise we fallback to KASAN_MINIMAL
and some stuff like stack instrumentation is not performed
- Moved calls to kasan_early_init() in head.S because stack instrumentation
in machine_init was performed before the call to kasan_early_init()
- Mapping kasan_early_shadow_page RW in kasan_early_init() and
remaping RO later in kasan_init()
- Allocating a big memblock() for shadow area, falling back to PAGE_SIZE blocks in case of failure.

Changes in v4:
- Comments from Andrey (DISABLE_BRANCH_PROFILING, Activation of reports)
- Proper initialisation of shadow area in kasan_init()
- Panic in case Hash table is required.
- Added comments in patch one to explain why *t = *s becomes memcpy(t, s, ...)
- Call of kasan_init_tags()

Changes in v3:
- Removed the printk() in kasan_early_init() to avoid build failure (see https://github.com/linuxppc/issues/issues/218)
- Added necessary changes in asm/book3s/32/pgtable.h to get it work on powerpc 603 family
- Added a few KASAN_SANITIZE_xxx.o := n to successfully boot on powerpc 603 family

Changes in v2:
- Rebased.
- Using __set_pte_at() to build the early table.
- Worked around and got rid of the patch adding asm/page.h in asm/pgtable-types.h
    ==> might be fixed independently but not needed for this serie.

Christophe Leroy (11):
  powerpc/32: Move early_init() in a separate file
  powerpc: prepare string/mem functions for KASAN
  powerpc/prom_init: don't use string functions from lib/
  powerpc/mm: don't use direct assignation during early boot.
  powerpc/32: use memset() instead of memset_io() to zero BSS
  powerpc/32: make KVIRT_TOP dependent on FIXMAP_START
  powerpc/32: prepare shadow area for KASAN
  powerpc: disable KASAN instrumentation on early/critical files.
  powerpc/32: Add KASAN support
  powerpc/32s: move hash code patching out of MMU_init_hw()
  powerpc/32s: set up an early static hash table for KASAN.

 arch/powerpc/Kconfig                         |   1 +
 arch/powerpc/Kconfig.debug                   |   5 +
 arch/powerpc/include/asm/book3s/32/pgtable.h |  13 +-
 arch/powerpc/include/asm/fixmap.h            |   5 +
 arch/powerpc/include/asm/kasan.h             |  39 +++++
 arch/powerpc/include/asm/nohash/32/pgtable.h |  13 +-
 arch/powerpc/include/asm/string.h            |  32 +++-
 arch/powerpc/kernel/Makefile                 |  14 +-
 arch/powerpc/kernel/cputable.c               |  13 +-
 arch/powerpc/kernel/early_32.c               |  36 +++++
 arch/powerpc/kernel/head_32.S                |  49 ++++--
 arch/powerpc/kernel/head_40x.S               |   3 +
 arch/powerpc/kernel/head_44x.S               |   3 +
 arch/powerpc/kernel/head_8xx.S               |   3 +
 arch/powerpc/kernel/head_fsl_booke.S         |   3 +
 arch/powerpc/kernel/prom_init.c              | 213 +++++++++++++++++++++------
 arch/powerpc/kernel/prom_init_check.sh       |  12 +-
 arch/powerpc/kernel/setup-common.c           |   3 +
 arch/powerpc/kernel/setup_32.c               |  28 ----
 arch/powerpc/lib/Makefile                    |  19 ++-
 arch/powerpc/lib/copy_32.S                   |  15 +-
 arch/powerpc/lib/mem_64.S                    |  11 +-
 arch/powerpc/lib/memcpy_64.S                 |   5 +-
 arch/powerpc/mm/Makefile                     |   7 +
 arch/powerpc/mm/kasan/Makefile               |   5 +
 arch/powerpc/mm/kasan/kasan_init_32.c        | 189 ++++++++++++++++++++++++
 arch/powerpc/mm/mem.c                        |   4 +
 arch/powerpc/mm/mmu_decl.h                   |   2 +
 arch/powerpc/mm/ppc_mmu_32.c                 |  36 +++--
 arch/powerpc/mm/ptdump/ptdump.c              |   8 +
 arch/powerpc/platforms/powermac/Makefile     |   6 +
 arch/powerpc/purgatory/Makefile              |   3 +
 arch/powerpc/xmon/Makefile                   |   1 +
 33 files changed, 676 insertions(+), 123 deletions(-)
 create mode 100644 arch/powerpc/include/asm/kasan.h
 create mode 100644 arch/powerpc/kernel/early_32.c
 create mode 100644 arch/powerpc/mm/kasan/Makefile
 create mode 100644 arch/powerpc/mm/kasan/kasan_init_32.c

-- 
2.13.3

[PATCH v9 01/11] powerpc/32: Move early_init() in a separate file

[Christophe Leroy]

In preparation of KASAN, move early_init() into a separate
file in order to allow deactivation of KASAN for that function.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/Makefile   |  2 +-
 arch/powerpc/kernel/early_32.c | 36 ++++++++++++++++++++++++++++++++++++
 arch/powerpc/kernel/setup_32.c | 28 ----------------------------
 3 files changed, 37 insertions(+), 29 deletions(-)
 create mode 100644 arch/powerpc/kernel/early_32.c

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index cddadccf551d..45e47752b692 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -93,7 +93,7 @@ extra-y				+= vmlinux.lds
 
 obj-$(CONFIG_RELOCATABLE)	+= reloc_$(BITS).o
 
-obj-$(CONFIG_PPC32)		+= entry_32.o setup_32.o
+obj-$(CONFIG_PPC32)		+= entry_32.o setup_32.o early_32.o
 obj-$(CONFIG_PPC64)		+= dma-iommu.o iommu.o
 obj-$(CONFIG_KGDB)		+= kgdb.o
 obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
diff --git a/arch/powerpc/kernel/early_32.c b/arch/powerpc/kernel/early_32.c
new file mode 100644
index 000000000000..cf3cdd81dc47
--- /dev/null
+++ b/arch/powerpc/kernel/early_32.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Early init before relocation
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/asm-prototypes.h>
+
+/*
+ * We're called here very early in the boot.
+ *
+ * Note that the kernel may be running at an address which is different
+ * from the address that it was linked at, so we must use RELOC/PTRRELOC
+ * to access static data (including strings).  -- paulus
+ */
+notrace unsigned long __init early_init(unsigned long dt_ptr)
+{
+	unsigned long offset = reloc_offset();
+
+	/* First zero the BSS -- use memset_io, some platforms don't have caches on yet */
+	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
+
+	/*
+	 * Identify the CPU type and fix up code sections
+	 * that depend on which cpu we have.
+	 */
+	identify_cpu(offset, mfspr(SPRN_PVR));
+
+	apply_feature_fixups();
+
+	return KERNELBASE + offset;
+}
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 1f0b7629c1a6..3f0d51b4b2f5 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -63,34 +63,6 @@ EXPORT_SYMBOL(DMA_MODE_READ);
 EXPORT_SYMBOL(DMA_MODE_WRITE);
 
 /*
- * We're called here very early in the boot.
- *
- * Note that the kernel may be running at an address which is different
- * from the address that it was linked at, so we must use RELOC/PTRRELOC
- * to access static data (including strings).  -- paulus
- */
-notrace unsigned long __init early_init(unsigned long dt_ptr)
-{
-	unsigned long offset = reloc_offset();
-
-	/* First zero the BSS -- use memset_io, some platforms don't have
-	 * caches on yet */
-	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0,
-			__bss_stop - __bss_start);
-
-	/*
-	 * Identify the CPU type and fix up code sections
-	 * that depend on which cpu we have.
-	 */
-	identify_cpu(offset, mfspr(SPRN_PVR));
-
-	apply_feature_fixups();
-
-	return KERNELBASE + offset;
-}
-
-
-/*
  * This is run before start_kernel(), the kernel has been relocated
  * and we are running with enough of the MMU enabled to have our
  * proper kernel virtual addresses
-- 
2.13.3

[PATCH v9 01/11] powerpc/32: Move early_init() in a separate file

[Christophe Leroy]

In preparation of KASAN, move early_init() into a separate
file in order to allow deactivation of KASAN for that function.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/Makefile   |  2 +-
 arch/powerpc/kernel/early_32.c | 36 ++++++++++++++++++++++++++++++++++++
 arch/powerpc/kernel/setup_32.c | 28 ----------------------------
 3 files changed, 37 insertions(+), 29 deletions(-)
 create mode 100644 arch/powerpc/kernel/early_32.c

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index cddadccf551d..45e47752b692 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -93,7 +93,7 @@ extra-y				+= vmlinux.lds
 
 obj-$(CONFIG_RELOCATABLE)	+= reloc_$(BITS).o
 
-obj-$(CONFIG_PPC32)		+= entry_32.o setup_32.o
+obj-$(CONFIG_PPC32)		+= entry_32.o setup_32.o early_32.o
 obj-$(CONFIG_PPC64)		+= dma-iommu.o iommu.o
 obj-$(CONFIG_KGDB)		+= kgdb.o
 obj-$(CONFIG_BOOTX_TEXT)	+= btext.o
diff --git a/arch/powerpc/kernel/early_32.c b/arch/powerpc/kernel/early_32.c
new file mode 100644
index 000000000000..cf3cdd81dc47
--- /dev/null
+++ b/arch/powerpc/kernel/early_32.c
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-2.0
+
+/*
+ * Early init before relocation
+ */
+
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <asm/setup.h>
+#include <asm/sections.h>
+#include <asm/asm-prototypes.h>
+
+/*
+ * We're called here very early in the boot.
+ *
+ * Note that the kernel may be running at an address which is different
+ * from the address that it was linked at, so we must use RELOC/PTRRELOC
+ * to access static data (including strings).  -- paulus
+ */
+notrace unsigned long __init early_init(unsigned long dt_ptr)
+{
+	unsigned long offset = reloc_offset();
+
+	/* First zero the BSS -- use memset_io, some platforms don't have caches on yet */
+	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
+
+	/*
+	 * Identify the CPU type and fix up code sections
+	 * that depend on which cpu we have.
+	 */
+	identify_cpu(offset, mfspr(SPRN_PVR));
+
+	apply_feature_fixups();
+
+	return KERNELBASE + offset;
+}
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 1f0b7629c1a6..3f0d51b4b2f5 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -63,34 +63,6 @@ EXPORT_SYMBOL(DMA_MODE_READ);
 EXPORT_SYMBOL(DMA_MODE_WRITE);
 
 /*
- * We're called here very early in the boot.
- *
- * Note that the kernel may be running at an address which is different
- * from the address that it was linked at, so we must use RELOC/PTRRELOC
- * to access static data (including strings).  -- paulus
- */
-notrace unsigned long __init early_init(unsigned long dt_ptr)
-{
-	unsigned long offset = reloc_offset();
-
-	/* First zero the BSS -- use memset_io, some platforms don't have
-	 * caches on yet */
-	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0,
-			__bss_stop - __bss_start);
-
-	/*
-	 * Identify the CPU type and fix up code sections
-	 * that depend on which cpu we have.
-	 */
-	identify_cpu(offset, mfspr(SPRN_PVR));
-
-	apply_feature_fixups();
-
-	return KERNELBASE + offset;
-}
-
-
-/*
  * This is run before start_kernel(), the kernel has been relocated
  * and we are running with enough of the MMU enabled to have our
  * proper kernel virtual addresses
-- 
2.13.3

[PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Christophe Leroy]

CONFIG_KASAN implements wrappers for memcpy() memmove() and memset()
Those wrappers are doing the verification then call respectively
__memcpy() __memmove() and __memset(). The arches are therefore
expected to rename their optimised functions that way.

For files on which KASAN is inhibited, #defines are used to allow
them to directly call optimised versions of the functions without
going through the KASAN wrappers.

See commit 393f203f5fd5 ("x86_64: kasan: add interceptors for
memset/memmove/memcpy functions") for details.

Other string / mem functions do not (yet) have kasan wrappers,
we therefore have to fallback to the generic versions when
KASAN is active, otherwise KASAN checks will be skipped.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/kasan.h       | 15 +++++++++++++++
 arch/powerpc/include/asm/string.h      | 32 +++++++++++++++++++++++++++++---
 arch/powerpc/kernel/prom_init_check.sh | 10 +++++++++-
 arch/powerpc/lib/Makefile              | 11 ++++++++---
 arch/powerpc/lib/copy_32.S             | 15 +++++++++------
 arch/powerpc/lib/mem_64.S              | 11 +++++++----
 arch/powerpc/lib/memcpy_64.S           |  5 +++--
 7 files changed, 80 insertions(+), 19 deletions(-)
 create mode 100644 arch/powerpc/include/asm/kasan.h

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
new file mode 100644
index 000000000000..c3161b8fc017
--- /dev/null
+++ b/arch/powerpc/include/asm/kasan.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_KASAN_H
+#define __ASM_KASAN_H
+
+#ifdef CONFIG_KASAN
+#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
+#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
+#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
+#else
+#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
+#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
+#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
+#endif
+
+#endif
diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
index 1647de15a31e..9bf6dffb4090 100644
--- a/arch/powerpc/include/asm/string.h
+++ b/arch/powerpc/include/asm/string.h
@@ -4,14 +4,17 @@
 
 #ifdef __KERNEL__
 
+#ifndef CONFIG_KASAN
 #define __HAVE_ARCH_STRNCPY
 #define __HAVE_ARCH_STRNCMP
+#define __HAVE_ARCH_MEMCHR
+#define __HAVE_ARCH_MEMCMP
+#define __HAVE_ARCH_MEMSET16
+#endif
+
 #define __HAVE_ARCH_MEMSET
 #define __HAVE_ARCH_MEMCPY
 #define __HAVE_ARCH_MEMMOVE
-#define __HAVE_ARCH_MEMCMP
-#define __HAVE_ARCH_MEMCHR
-#define __HAVE_ARCH_MEMSET16
 #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
 
 extern char * strcpy(char *,const char *);
@@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
 extern void * memchr(const void *,int,__kernel_size_t);
 extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
 
+void *__memset(void *s, int c, __kernel_size_t count);
+void *__memcpy(void *to, const void *from, __kernel_size_t n);
+void *__memmove(void *to, const void *from, __kernel_size_t n);
+
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+/*
+ * For files that are not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+
+#ifndef __NO_FORTIFY
+#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
+#endif
+
+#endif
+
 #ifdef CONFIG_PPC64
+#ifndef CONFIG_KASAN
 #define __HAVE_ARCH_MEMSET32
 #define __HAVE_ARCH_MEMSET64
 
@@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
 {
 	return __memset64(p, v, n * 8);
 }
+#endif
 #else
+#ifndef CONFIG_KASAN
 #define __HAVE_ARCH_STRLEN
+#endif
 
 extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
 #endif
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index 667df97d2595..181fd10008ef 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -16,8 +16,16 @@
 # If you really need to reference something from prom_init.o add
 # it to the list below:
 
+grep "^CONFIG_KASAN=y$" .config >/dev/null
+if [ $? -eq 0 ]
+then
+	MEM_FUNCS="__memcpy __memset"
+else
+	MEM_FUNCS="memcpy memset"
+fi
+
 WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
-_end enter_prom memcpy memset reloc_offset __secondary_hold
+_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
 __secondary_hold_acknowledge __secondary_hold_spinloop __start
 strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
 reloc_got2 kernstart_addr memstart_addr linux_banner _stext
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 79396e184bca..47a4de434c22 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
 CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
 
-obj-y += string.o alloc.o code-patching.o feature-fixups.o
+obj-y += alloc.o code-patching.o feature-fixups.o
 
-obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
+ifndef CONFIG_KASAN
+obj-y	+=	string.o memcmp_$(BITS).o
+obj-$(CONFIG_PPC32)	+= strlen_32.o
+endif
+
+obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
 
 obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
 
@@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
 					   test_emulate_step_exec_instr.o
 
 obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
-			   string_$(BITS).o memcmp_$(BITS).o
+			   string_$(BITS).o
 
 obj-y			+= sstep.o ldstfp.o quad.o
 obj64-y			+= quad.o
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
index ba66846fe973..fc4fa7246200 100644
--- a/arch/powerpc/lib/copy_32.S
+++ b/arch/powerpc/lib/copy_32.S
@@ -14,6 +14,7 @@
 #include <asm/ppc_asm.h>
 #include <asm/export.h>
 #include <asm/code-patching-asm.h>
+#include <asm/kasan.h>
 
 #define COPY_16_BYTES		\
 	lwz	r7,4(r4);	\
@@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
 LG_CACHELINE_BYTES = L1_CACHE_SHIFT
 CACHELINE_MASK = (L1_CACHE_BYTES-1)
 
+#ifndef CONFIG_KASAN
 _GLOBAL(memset16)
 	rlwinm.	r0 ,r5, 31, 1, 31
 	addi	r6, r3, -4
@@ -81,6 +83,7 @@ _GLOBAL(memset16)
 	sth	r4, 4(r6)
 	blr
 EXPORT_SYMBOL(memset16)
+#endif
 
 /*
  * Use dcbz on the complete cache lines in the destination
@@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
  * We therefore skip the optimised bloc that uses dcbz. This jump is
  * replaced by a nop once cache is active. This is done in machine_init()
  */
-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
 	cmplwi	0,r5,4
 	blt	7f
 
@@ -150,7 +153,7 @@ _GLOBAL(memset)
 9:	stbu	r4,1(r6)
 	bdnz	9b
 	blr
-EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)
 
 /*
  * This version uses dcbz on the complete cache lines in the
@@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
  * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
  * replaced by a nop once cache is active. This is done in machine_init()
  */
-_GLOBAL(memmove)
+_GLOBAL_KASAN(memmove)
 	cmplw	0,r3,r4
 	bgt	backwards_memcpy
 	/* fall through */
 
-_GLOBAL(memcpy)
+_GLOBAL_KASAN(memcpy)
 1:	b	generic_memcpy
 	patch_site	1b, patch__memcpy_nocache
 
@@ -242,8 +245,8 @@ _GLOBAL(memcpy)
 	stbu	r0,1(r6)
 	bdnz	40b
 65:	blr
-EXPORT_SYMBOL(memcpy)
-EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memcpy)
+EXPORT_SYMBOL_KASAN(memmove)
 
 generic_memcpy:
 	srwi.	r7,r5,3
diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
index 3c3be02f33b7..7cd6cf6822a2 100644
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -12,7 +12,9 @@
 #include <asm/errno.h>
 #include <asm/ppc_asm.h>
 #include <asm/export.h>
+#include <asm/kasan.h>
 
+#ifndef CONFIG_KASAN
 _GLOBAL(__memset16)
 	rlwimi	r4,r4,16,0,15
 	/* fall through */
@@ -29,8 +31,9 @@ _GLOBAL(__memset64)
 EXPORT_SYMBOL(__memset16)
 EXPORT_SYMBOL(__memset32)
 EXPORT_SYMBOL(__memset64)
+#endif
 
-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
 	neg	r0,r3
 	rlwimi	r4,r4,8,16,23
 	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
@@ -95,9 +98,9 @@ _GLOBAL(memset)
 10:	bflr	31
 	stb	r4,0(r6)
 	blr
-EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)
 
-_GLOBAL_TOC(memmove)
+_GLOBAL_TOC_KASAN(memmove)
 	cmplw	0,r3,r4
 	bgt	backwards_memcpy
 	b	memcpy
@@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
 	beq	2b
 	mtctr	r7
 	b	1b
-EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memmove)
diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
index 273ea67e60a1..862b515b8868 100644
--- a/arch/powerpc/lib/memcpy_64.S
+++ b/arch/powerpc/lib/memcpy_64.S
@@ -11,6 +11,7 @@
 #include <asm/export.h>
 #include <asm/asm-compat.h>
 #include <asm/feature-fixups.h>
+#include <asm/kasan.h>
 
 #ifndef SELFTEST_CASE
 /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
@@ -18,7 +19,7 @@
 #endif
 
 	.align	7
-_GLOBAL_TOC(memcpy)
+_GLOBAL_TOC_KASAN(memcpy)
 BEGIN_FTR_SECTION
 #ifdef __LITTLE_ENDIAN__
 	cmpdi	cr7,r5,0
@@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
 	blr
 #endif
-EXPORT_SYMBOL(memcpy)
+EXPORT_SYMBOL_KASAN(memcpy)
-- 
2.13.3

[PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Christophe Leroy]

CONFIG_KASAN implements wrappers for memcpy() memmove() and memset()
Those wrappers are doing the verification then call respectively
__memcpy() __memmove() and __memset(). The arches are therefore
expected to rename their optimised functions that way.

For files on which KASAN is inhibited, #defines are used to allow
them to directly call optimised versions of the functions without
going through the KASAN wrappers.

See commit 393f203f5fd5 ("x86_64: kasan: add interceptors for
memset/memmove/memcpy functions") for details.

Other string / mem functions do not (yet) have kasan wrappers,
we therefore have to fallback to the generic versions when
KASAN is active, otherwise KASAN checks will be skipped.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/kasan.h       | 15 +++++++++++++++
 arch/powerpc/include/asm/string.h      | 32 +++++++++++++++++++++++++++++---
 arch/powerpc/kernel/prom_init_check.sh | 10 +++++++++-
 arch/powerpc/lib/Makefile              | 11 ++++++++---
 arch/powerpc/lib/copy_32.S             | 15 +++++++++------
 arch/powerpc/lib/mem_64.S              | 11 +++++++----
 arch/powerpc/lib/memcpy_64.S           |  5 +++--
 7 files changed, 80 insertions(+), 19 deletions(-)
 create mode 100644 arch/powerpc/include/asm/kasan.h

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
new file mode 100644
index 000000000000..c3161b8fc017
--- /dev/null
+++ b/arch/powerpc/include/asm/kasan.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_KASAN_H
+#define __ASM_KASAN_H
+
+#ifdef CONFIG_KASAN
+#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
+#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
+#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
+#else
+#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
+#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
+#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
+#endif
+
+#endif
diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
index 1647de15a31e..9bf6dffb4090 100644
--- a/arch/powerpc/include/asm/string.h
+++ b/arch/powerpc/include/asm/string.h
@@ -4,14 +4,17 @@
 
 #ifdef __KERNEL__
 
+#ifndef CONFIG_KASAN
 #define __HAVE_ARCH_STRNCPY
 #define __HAVE_ARCH_STRNCMP
+#define __HAVE_ARCH_MEMCHR
+#define __HAVE_ARCH_MEMCMP
+#define __HAVE_ARCH_MEMSET16
+#endif
+
 #define __HAVE_ARCH_MEMSET
 #define __HAVE_ARCH_MEMCPY
 #define __HAVE_ARCH_MEMMOVE
-#define __HAVE_ARCH_MEMCMP
-#define __HAVE_ARCH_MEMCHR
-#define __HAVE_ARCH_MEMSET16
 #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
 
 extern char * strcpy(char *,const char *);
@@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
 extern void * memchr(const void *,int,__kernel_size_t);
 extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
 
+void *__memset(void *s, int c, __kernel_size_t count);
+void *__memcpy(void *to, const void *from, __kernel_size_t n);
+void *__memmove(void *to, const void *from, __kernel_size_t n);
+
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+/*
+ * For files that are not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+
+#ifndef __NO_FORTIFY
+#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
+#endif
+
+#endif
+
 #ifdef CONFIG_PPC64
+#ifndef CONFIG_KASAN
 #define __HAVE_ARCH_MEMSET32
 #define __HAVE_ARCH_MEMSET64
 
@@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
 {
 	return __memset64(p, v, n * 8);
 }
+#endif
 #else
+#ifndef CONFIG_KASAN
 #define __HAVE_ARCH_STRLEN
+#endif
 
 extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
 #endif
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index 667df97d2595..181fd10008ef 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -16,8 +16,16 @@
 # If you really need to reference something from prom_init.o add
 # it to the list below:
 
+grep "^CONFIG_KASAN=y$" .config >/dev/null
+if [ $? -eq 0 ]
+then
+	MEM_FUNCS="__memcpy __memset"
+else
+	MEM_FUNCS="memcpy memset"
+fi
+
 WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
-_end enter_prom memcpy memset reloc_offset __secondary_hold
+_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
 __secondary_hold_acknowledge __secondary_hold_spinloop __start
 strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
 reloc_got2 kernstart_addr memstart_addr linux_banner _stext
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 79396e184bca..47a4de434c22 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
 CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
 
-obj-y += string.o alloc.o code-patching.o feature-fixups.o
+obj-y += alloc.o code-patching.o feature-fixups.o
 
-obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
+ifndef CONFIG_KASAN
+obj-y	+=	string.o memcmp_$(BITS).o
+obj-$(CONFIG_PPC32)	+= strlen_32.o
+endif
+
+obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
 
 obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
 
@@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
 					   test_emulate_step_exec_instr.o
 
 obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
-			   string_$(BITS).o memcmp_$(BITS).o
+			   string_$(BITS).o
 
 obj-y			+= sstep.o ldstfp.o quad.o
 obj64-y			+= quad.o
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
index ba66846fe973..fc4fa7246200 100644
--- a/arch/powerpc/lib/copy_32.S
+++ b/arch/powerpc/lib/copy_32.S
@@ -14,6 +14,7 @@
 #include <asm/ppc_asm.h>
 #include <asm/export.h>
 #include <asm/code-patching-asm.h>
+#include <asm/kasan.h>
 
 #define COPY_16_BYTES		\
 	lwz	r7,4(r4);	\
@@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
 LG_CACHELINE_BYTES = L1_CACHE_SHIFT
 CACHELINE_MASK = (L1_CACHE_BYTES-1)
 
+#ifndef CONFIG_KASAN
 _GLOBAL(memset16)
 	rlwinm.	r0 ,r5, 31, 1, 31
 	addi	r6, r3, -4
@@ -81,6 +83,7 @@ _GLOBAL(memset16)
 	sth	r4, 4(r6)
 	blr
 EXPORT_SYMBOL(memset16)
+#endif
 
 /*
  * Use dcbz on the complete cache lines in the destination
@@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
  * We therefore skip the optimised bloc that uses dcbz. This jump is
  * replaced by a nop once cache is active. This is done in machine_init()
  */
-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
 	cmplwi	0,r5,4
 	blt	7f
 
@@ -150,7 +153,7 @@ _GLOBAL(memset)
 9:	stbu	r4,1(r6)
 	bdnz	9b
 	blr
-EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)
 
 /*
  * This version uses dcbz on the complete cache lines in the
@@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
  * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
  * replaced by a nop once cache is active. This is done in machine_init()
  */
-_GLOBAL(memmove)
+_GLOBAL_KASAN(memmove)
 	cmplw	0,r3,r4
 	bgt	backwards_memcpy
 	/* fall through */
 
-_GLOBAL(memcpy)
+_GLOBAL_KASAN(memcpy)
 1:	b	generic_memcpy
 	patch_site	1b, patch__memcpy_nocache
 
@@ -242,8 +245,8 @@ _GLOBAL(memcpy)
 	stbu	r0,1(r6)
 	bdnz	40b
 65:	blr
-EXPORT_SYMBOL(memcpy)
-EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memcpy)
+EXPORT_SYMBOL_KASAN(memmove)
 
 generic_memcpy:
 	srwi.	r7,r5,3
diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
index 3c3be02f33b7..7cd6cf6822a2 100644
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -12,7 +12,9 @@
 #include <asm/errno.h>
 #include <asm/ppc_asm.h>
 #include <asm/export.h>
+#include <asm/kasan.h>
 
+#ifndef CONFIG_KASAN
 _GLOBAL(__memset16)
 	rlwimi	r4,r4,16,0,15
 	/* fall through */
@@ -29,8 +31,9 @@ _GLOBAL(__memset64)
 EXPORT_SYMBOL(__memset16)
 EXPORT_SYMBOL(__memset32)
 EXPORT_SYMBOL(__memset64)
+#endif
 
-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
 	neg	r0,r3
 	rlwimi	r4,r4,8,16,23
 	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
@@ -95,9 +98,9 @@ _GLOBAL(memset)
 10:	bflr	31
 	stb	r4,0(r6)
 	blr
-EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)
 
-_GLOBAL_TOC(memmove)
+_GLOBAL_TOC_KASAN(memmove)
 	cmplw	0,r3,r4
 	bgt	backwards_memcpy
 	b	memcpy
@@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
 	beq	2b
 	mtctr	r7
 	b	1b
-EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memmove)
diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
index 273ea67e60a1..862b515b8868 100644
--- a/arch/powerpc/lib/memcpy_64.S
+++ b/arch/powerpc/lib/memcpy_64.S
@@ -11,6 +11,7 @@
 #include <asm/export.h>
 #include <asm/asm-compat.h>
 #include <asm/feature-fixups.h>
+#include <asm/kasan.h>
 
 #ifndef SELFTEST_CASE
 /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
@@ -18,7 +19,7 @@
 #endif
 
 	.align	7
-_GLOBAL_TOC(memcpy)
+_GLOBAL_TOC_KASAN(memcpy)
 BEGIN_FTR_SECTION
 #ifdef __LITTLE_ENDIAN__
 	cmpdi	cr7,r5,0
@@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
 	blr
 #endif
-EXPORT_SYMBOL(memcpy)
+EXPORT_SYMBOL_KASAN(memcpy)
-- 
2.13.3

[PATCH v9 03/11] powerpc/prom_init: don't use string functions from lib/

[Christophe Leroy]

When KASAN is active, the string functions in lib/ are doing the
KASAN checks. This is too early for prom_init.

This patch implements dedicated string functions for prom_init,
which will be compiled in with KASAN disabled.

Size of prom_init before the patch:
   text	   data	    bss	    dec	    hex	filename
  12060	    488	   6960	  19508	   4c34	arch/powerpc/kernel/prom_init.o

Size of prom_init after the patch:
   text	   data	    bss	    dec	    hex	filename
  12460	    488	   6960	  19908	   4dc4	arch/powerpc/kernel/prom_init.o

This increases the size of prom_init a bit, but as prom_init is
in __init section, it is freed after boot anyway.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/prom_init.c        | 213 ++++++++++++++++++++++++++-------
 arch/powerpc/kernel/prom_init_check.sh |   2 +-
 2 files changed, 173 insertions(+), 42 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index f33ff4163a51..56d5639ab082 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -224,6 +224,137 @@ static bool  __prombss rtas_has_query_cpu_stopped;
 #define PHANDLE_VALID(p)	((p) != 0 && (p) != PROM_ERROR)
 #define IHANDLE_VALID(i)	((i) != 0 && (i) != PROM_ERROR)
 
+/* Copied from lib/string.c and lib/kstrtox.c */
+
+static int __init prom_strcmp(const char *cs, const char *ct)
+{
+	unsigned char c1, c2;
+
+	while (1) {
+		c1 = *cs++;
+		c2 = *ct++;
+		if (c1 != c2)
+			return c1 < c2 ? -1 : 1;
+		if (!c1)
+			break;
+	}
+	return 0;
+}
+
+static char __init *prom_strcpy(char *dest, const char *src)
+{
+	char *tmp = dest;
+
+	while ((*dest++ = *src++) != '\0')
+		/* nothing */;
+	return tmp;
+}
+
+static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
+{
+	unsigned char c1, c2;
+
+	while (count) {
+		c1 = *cs++;
+		c2 = *ct++;
+		if (c1 != c2)
+			return c1 < c2 ? -1 : 1;
+		if (!c1)
+			break;
+		count--;
+	}
+	return 0;
+}
+
+static size_t __init prom_strlen(const char *s)
+{
+	const char *sc;
+
+	for (sc = s; *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
+{
+	const unsigned char *su1, *su2;
+	int res = 0;
+
+	for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+		if ((res = *su1 - *su2) != 0)
+			break;
+	return res;
+}
+
+static char __init *prom_strstr(const char *s1, const char *s2)
+{
+	size_t l1, l2;
+
+	l2 = prom_strlen(s2);
+	if (!l2)
+		return (char *)s1;
+	l1 = prom_strlen(s1);
+	while (l1 >= l2) {
+		l1--;
+		if (!prom_memcmp(s1, s2, l2))
+			return (char *)s1;
+		s1++;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_CMDLINE
+static size_t __init prom_strlcpy(char *dest, const char *src, size_t size)
+{
+	size_t ret = prom_strlen(src);
+
+	if (size) {
+		size_t len = (ret >= size) ? size - 1 : ret;
+		memcpy(dest, src, len);
+		dest[len] = '\0';
+	}
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_PPC_PSERIES
+static int __init prom_strtobool(const char *s, bool *res)
+{
+	if (!s)
+		return -EINVAL;
+
+	switch (s[0]) {
+	case 'y':
+	case 'Y':
+	case '1':
+		*res = true;
+		return 0;
+	case 'n':
+	case 'N':
+	case '0':
+		*res = false;
+		return 0;
+	case 'o':
+	case 'O':
+		switch (s[1]) {
+		case 'n':
+		case 'N':
+			*res = true;
+			return 0;
+		case 'f':
+		case 'F':
+			*res = false;
+			return 0;
+		default:
+			break;
+		}
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+#endif
 
 /* This is the one and *ONLY* place where we actually call open
  * firmware.
@@ -555,7 +686,7 @@ static int __init prom_setprop(phandle node, const char *nodename,
 	add_string(&p, tohex((u32)(unsigned long) value));
 	add_string(&p, tohex(valuelen));
 	add_string(&p, tohex(ADDR(pname)));
-	add_string(&p, tohex(strlen(pname)));
+	add_string(&p, tohex(prom_strlen(pname)));
 	add_string(&p, "property");
 	*p = 0;
 	return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
@@ -639,25 +770,25 @@ static void __init early_cmdline_parse(void)
 		l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
 #ifdef CONFIG_CMDLINE
 	if (l <= 0 || p[0] == '\0') /* dbl check */
-		strlcpy(prom_cmd_line,
+		prom_strlcpy(prom_cmd_line,
 			CONFIG_CMDLINE, sizeof(prom_cmd_line));
 #endif /* CONFIG_CMDLINE */
 	prom_printf("command line: %s\n", prom_cmd_line);
 
 #ifdef CONFIG_PPC64
-	opt = strstr(prom_cmd_line, "iommu=");
+	opt = prom_strstr(prom_cmd_line, "iommu=");
 	if (opt) {
 		prom_printf("iommu opt is: %s\n", opt);
 		opt += 6;
 		while (*opt && *opt == ' ')
 			opt++;
-		if (!strncmp(opt, "off", 3))
+		if (!prom_strncmp(opt, "off", 3))
 			prom_iommu_off = 1;
-		else if (!strncmp(opt, "force", 5))
+		else if (!prom_strncmp(opt, "force", 5))
 			prom_iommu_force_on = 1;
 	}
 #endif
-	opt = strstr(prom_cmd_line, "mem=");
+	opt = prom_strstr(prom_cmd_line, "mem=");
 	if (opt) {
 		opt += 4;
 		prom_memory_limit = prom_memparse(opt, (const char **)&opt);
@@ -669,13 +800,13 @@ static void __init early_cmdline_parse(void)
 
 #ifdef CONFIG_PPC_PSERIES
 	prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
-	opt = strstr(prom_cmd_line, "disable_radix");
+	opt = prom_strstr(prom_cmd_line, "disable_radix");
 	if (opt) {
 		opt += 13;
 		if (*opt && *opt == '=') {
 			bool val;
 
-			if (kstrtobool(++opt, &val))
+			if (prom_strtobool(++opt, &val))
 				prom_radix_disable = false;
 			else
 				prom_radix_disable = val;
@@ -1028,7 +1159,7 @@ static int __init prom_count_smt_threads(void)
 		type[0] = 0;
 		prom_getprop(node, "device_type", type, sizeof(type));
 
-		if (strcmp(type, "cpu"))
+		if (prom_strcmp(type, "cpu"))
 			continue;
 		/*
 		 * There is an entry for each smt thread, each entry being
@@ -1475,7 +1606,7 @@ static void __init prom_init_mem(void)
 			 */
 			prom_getprop(node, "name", type, sizeof(type));
 		}
-		if (strcmp(type, "memory"))
+		if (prom_strcmp(type, "memory"))
 			continue;
 
 		plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
@@ -1756,19 +1887,19 @@ static void __init prom_initialize_tce_table(void)
 		prom_getprop(node, "device_type", type, sizeof(type));
 		prom_getprop(node, "model", model, sizeof(model));
 
-		if ((type[0] == 0) || (strstr(type, "pci") == NULL))
+		if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
 			continue;
 
 		/* Keep the old logic intact to avoid regression. */
 		if (compatible[0] != 0) {
-			if ((strstr(compatible, "python") == NULL) &&
-			    (strstr(compatible, "Speedwagon") == NULL) &&
-			    (strstr(compatible, "Winnipeg") == NULL))
+			if ((prom_strstr(compatible, "python") == NULL) &&
+			    (prom_strstr(compatible, "Speedwagon") == NULL) &&
+			    (prom_strstr(compatible, "Winnipeg") == NULL))
 				continue;
 		} else if (model[0] != 0) {
-			if ((strstr(model, "ython") == NULL) &&
-			    (strstr(model, "peedwagon") == NULL) &&
-			    (strstr(model, "innipeg") == NULL))
+			if ((prom_strstr(model, "ython") == NULL) &&
+			    (prom_strstr(model, "peedwagon") == NULL) &&
+			    (prom_strstr(model, "innipeg") == NULL))
 				continue;
 		}
 
@@ -1917,12 +2048,12 @@ static void __init prom_hold_cpus(void)
 
 		type[0] = 0;
 		prom_getprop(node, "device_type", type, sizeof(type));
-		if (strcmp(type, "cpu") != 0)
+		if (prom_strcmp(type, "cpu") != 0)
 			continue;
 
 		/* Skip non-configured cpus. */
 		if (prom_getprop(node, "status", type, sizeof(type)) > 0)
-			if (strcmp(type, "okay") != 0)
+			if (prom_strcmp(type, "okay") != 0)
 				continue;
 
 		reg = cpu_to_be32(-1); /* make sparse happy */
@@ -1998,9 +2129,9 @@ static void __init prom_find_mmu(void)
 		return;
 	version[sizeof(version) - 1] = 0;
 	/* XXX might need to add other versions here */
-	if (strcmp(version, "Open Firmware, 1.0.5") == 0)
+	if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
 		of_workarounds = OF_WA_CLAIM;
-	else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
+	else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
 		of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
 		call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
 	} else
@@ -2033,7 +2164,7 @@ static void __init prom_init_stdout(void)
 	call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
 	prom_printf("OF stdout device is: %s\n", of_stdout_device);
 	prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
-		     path, strlen(path) + 1);
+		     path, prom_strlen(path) + 1);
 
 	/* instance-to-package fails on PA-Semi */
 	stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
@@ -2043,7 +2174,7 @@ static void __init prom_init_stdout(void)
 		/* If it's a display, note it */
 		memset(type, 0, sizeof(type));
 		prom_getprop(stdout_node, "device_type", type, sizeof(type));
-		if (strcmp(type, "display") == 0)
+		if (prom_strcmp(type, "display") == 0)
 			prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
 	}
 }
@@ -2064,19 +2195,19 @@ static int __init prom_find_machine_type(void)
 		compat[len] = 0;
 		while (i < len) {
 			char *p = &compat[i];
-			int sl = strlen(p);
+			int sl = prom_strlen(p);
 			if (sl == 0)
 				break;
-			if (strstr(p, "Power Macintosh") ||
-			    strstr(p, "MacRISC"))
+			if (prom_strstr(p, "Power Macintosh") ||
+			    prom_strstr(p, "MacRISC"))
 				return PLATFORM_POWERMAC;
 #ifdef CONFIG_PPC64
 			/* We must make sure we don't detect the IBM Cell
 			 * blades as pSeries due to some firmware issues,
 			 * so we do it here.
 			 */
-			if (strstr(p, "IBM,CBEA") ||
-			    strstr(p, "IBM,CPBW-1.0"))
+			if (prom_strstr(p, "IBM,CBEA") ||
+			    prom_strstr(p, "IBM,CPBW-1.0"))
 				return PLATFORM_GENERIC;
 #endif /* CONFIG_PPC64 */
 			i += sl + 1;
@@ -2093,7 +2224,7 @@ static int __init prom_find_machine_type(void)
 			   compat, sizeof(compat)-1);
 	if (len <= 0)
 		return PLATFORM_GENERIC;
-	if (strcmp(compat, "chrp"))
+	if (prom_strcmp(compat, "chrp"))
 		return PLATFORM_GENERIC;
 
 	/* Default to pSeries. We need to know if we are running LPAR */
@@ -2155,7 +2286,7 @@ static void __init prom_check_displays(void)
 	for (node = 0; prom_next_node(&node); ) {
 		memset(type, 0, sizeof(type));
 		prom_getprop(node, "device_type", type, sizeof(type));
-		if (strcmp(type, "display") != 0)
+		if (prom_strcmp(type, "display") != 0)
 			continue;
 
 		/* It seems OF doesn't null-terminate the path :-( */
@@ -2259,9 +2390,9 @@ static unsigned long __init dt_find_string(char *str)
 	s = os = (char *)dt_string_start;
 	s += 4;
 	while (s <  (char *)dt_string_end) {
-		if (strcmp(s, str) == 0)
+		if (prom_strcmp(s, str) == 0)
 			return s - os;
-		s += strlen(s) + 1;
+		s += prom_strlen(s) + 1;
 	}
 	return 0;
 }
@@ -2294,7 +2425,7 @@ static void __init scan_dt_build_strings(phandle node,
 		}
 
  		/* skip "name" */
- 		if (strcmp(namep, "name") == 0) {
+		if (prom_strcmp(namep, "name") == 0) {
  			*mem_start = (unsigned long)namep;
  			prev_name = "name";
  			continue;
@@ -2306,7 +2437,7 @@ static void __init scan_dt_build_strings(phandle node,
 			namep = sstart + soff;
 		} else {
 			/* Trim off some if we can */
-			*mem_start = (unsigned long)namep + strlen(namep) + 1;
+			*mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
 			dt_string_end = *mem_start;
 		}
 		prev_name = namep;
@@ -2375,7 +2506,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 			break;
 
  		/* skip "name" */
- 		if (strcmp(pname, "name") == 0) {
+		if (prom_strcmp(pname, "name") == 0) {
  			prev_name = "name";
  			continue;
  		}
@@ -2406,7 +2537,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 		call_prom("getprop", 4, 1, node, pname, valp, l);
 		*mem_start = _ALIGN(*mem_start, 4);
 
-		if (!strcmp(pname, "phandle"))
+		if (!prom_strcmp(pname, "phandle"))
 			has_phandle = 1;
 	}
 
@@ -2476,8 +2607,8 @@ static void __init flatten_device_tree(void)
 
 	/* Add "phandle" in there, we'll need it */
 	namep = make_room(&mem_start, &mem_end, 16, 1);
-	strcpy(namep, "phandle");
-	mem_start = (unsigned long)namep + strlen(namep) + 1;
+	prom_strcpy(namep, "phandle");
+	mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
 
 	/* Build string array */
 	prom_printf("Building dt strings...\n"); 
@@ -2799,7 +2930,7 @@ static void __init fixup_device_tree_efika(void)
 	rv = prom_getprop(node, "model", prop, sizeof(prop));
 	if (rv == PROM_ERROR)
 		return;
-	if (strcmp(prop, "EFIKA5K2"))
+	if (prom_strcmp(prop, "EFIKA5K2"))
 		return;
 
 	prom_printf("Applying EFIKA device tree fixups\n");
@@ -2807,13 +2938,13 @@ static void __init fixup_device_tree_efika(void)
 	/* Claiming to be 'chrp' is death */
 	node = call_prom("finddevice", 1, 1, ADDR("/"));
 	rv = prom_getprop(node, "device_type", prop, sizeof(prop));
-	if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
+	if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
 		prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
 
 	/* CODEGEN,description is exposed in /proc/cpuinfo so
 	   fix that too */
 	rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
-	if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
+	if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
 		prom_setprop(node, "/", "CODEGEN,description",
 			     "Efika 5200B PowerPC System",
 			     sizeof("Efika 5200B PowerPC System"));
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index 181fd10008ef..4cac45cb5de5 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -27,7 +27,7 @@ fi
 WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
 _end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
 __secondary_hold_acknowledge __secondary_hold_spinloop __start
-strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
+logo_linux_clut224
 reloc_got2 kernstart_addr memstart_addr linux_banner _stext
 __prom_init_toc_start __prom_init_toc_end btext_setup_display TOC."
 
-- 
2.13.3

[PATCH v9 03/11] powerpc/prom_init: don't use string functions from lib/

[Christophe Leroy]

When KASAN is active, the string functions in lib/ are doing the
KASAN checks. This is too early for prom_init.

This patch implements dedicated string functions for prom_init,
which will be compiled in with KASAN disabled.

Size of prom_init before the patch:
   text	   data	    bss	    dec	    hex	filename
  12060	    488	   6960	  19508	   4c34	arch/powerpc/kernel/prom_init.o

Size of prom_init after the patch:
   text	   data	    bss	    dec	    hex	filename
  12460	    488	   6960	  19908	   4dc4	arch/powerpc/kernel/prom_init.o

This increases the size of prom_init a bit, but as prom_init is
in __init section, it is freed after boot anyway.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/prom_init.c        | 213 ++++++++++++++++++++++++++-------
 arch/powerpc/kernel/prom_init_check.sh |   2 +-
 2 files changed, 173 insertions(+), 42 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index f33ff4163a51..56d5639ab082 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -224,6 +224,137 @@ static bool  __prombss rtas_has_query_cpu_stopped;
 #define PHANDLE_VALID(p)	((p) != 0 && (p) != PROM_ERROR)
 #define IHANDLE_VALID(i)	((i) != 0 && (i) != PROM_ERROR)
 
+/* Copied from lib/string.c and lib/kstrtox.c */
+
+static int __init prom_strcmp(const char *cs, const char *ct)
+{
+	unsigned char c1, c2;
+
+	while (1) {
+		c1 = *cs++;
+		c2 = *ct++;
+		if (c1 != c2)
+			return c1 < c2 ? -1 : 1;
+		if (!c1)
+			break;
+	}
+	return 0;
+}
+
+static char __init *prom_strcpy(char *dest, const char *src)
+{
+	char *tmp = dest;
+
+	while ((*dest++ = *src++) != '\0')
+		/* nothing */;
+	return tmp;
+}
+
+static int __init prom_strncmp(const char *cs, const char *ct, size_t count)
+{
+	unsigned char c1, c2;
+
+	while (count) {
+		c1 = *cs++;
+		c2 = *ct++;
+		if (c1 != c2)
+			return c1 < c2 ? -1 : 1;
+		if (!c1)
+			break;
+		count--;
+	}
+	return 0;
+}
+
+static size_t __init prom_strlen(const char *s)
+{
+	const char *sc;
+
+	for (sc = s; *sc != '\0'; ++sc)
+		/* nothing */;
+	return sc - s;
+}
+
+static int __init prom_memcmp(const void *cs, const void *ct, size_t count)
+{
+	const unsigned char *su1, *su2;
+	int res = 0;
+
+	for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+		if ((res = *su1 - *su2) != 0)
+			break;
+	return res;
+}
+
+static char __init *prom_strstr(const char *s1, const char *s2)
+{
+	size_t l1, l2;
+
+	l2 = prom_strlen(s2);
+	if (!l2)
+		return (char *)s1;
+	l1 = prom_strlen(s1);
+	while (l1 >= l2) {
+		l1--;
+		if (!prom_memcmp(s1, s2, l2))
+			return (char *)s1;
+		s1++;
+	}
+	return NULL;
+}
+
+#ifdef CONFIG_CMDLINE
+static size_t __init prom_strlcpy(char *dest, const char *src, size_t size)
+{
+	size_t ret = prom_strlen(src);
+
+	if (size) {
+		size_t len = (ret >= size) ? size - 1 : ret;
+		memcpy(dest, src, len);
+		dest[len] = '\0';
+	}
+	return ret;
+}
+#endif
+
+#ifdef CONFIG_PPC_PSERIES
+static int __init prom_strtobool(const char *s, bool *res)
+{
+	if (!s)
+		return -EINVAL;
+
+	switch (s[0]) {
+	case 'y':
+	case 'Y':
+	case '1':
+		*res = true;
+		return 0;
+	case 'n':
+	case 'N':
+	case '0':
+		*res = false;
+		return 0;
+	case 'o':
+	case 'O':
+		switch (s[1]) {
+		case 'n':
+		case 'N':
+			*res = true;
+			return 0;
+		case 'f':
+		case 'F':
+			*res = false;
+			return 0;
+		default:
+			break;
+		}
+	default:
+		break;
+	}
+
+	return -EINVAL;
+}
+#endif
 
 /* This is the one and *ONLY* place where we actually call open
  * firmware.
@@ -555,7 +686,7 @@ static int __init prom_setprop(phandle node, const char *nodename,
 	add_string(&p, tohex((u32)(unsigned long) value));
 	add_string(&p, tohex(valuelen));
 	add_string(&p, tohex(ADDR(pname)));
-	add_string(&p, tohex(strlen(pname)));
+	add_string(&p, tohex(prom_strlen(pname)));
 	add_string(&p, "property");
 	*p = 0;
 	return call_prom("interpret", 1, 1, (u32)(unsigned long) cmd);
@@ -639,25 +770,25 @@ static void __init early_cmdline_parse(void)
 		l = prom_getprop(prom.chosen, "bootargs", p, COMMAND_LINE_SIZE-1);
 #ifdef CONFIG_CMDLINE
 	if (l <= 0 || p[0] == '\0') /* dbl check */
-		strlcpy(prom_cmd_line,
+		prom_strlcpy(prom_cmd_line,
 			CONFIG_CMDLINE, sizeof(prom_cmd_line));
 #endif /* CONFIG_CMDLINE */
 	prom_printf("command line: %s\n", prom_cmd_line);
 
 #ifdef CONFIG_PPC64
-	opt = strstr(prom_cmd_line, "iommu=");
+	opt = prom_strstr(prom_cmd_line, "iommu=");
 	if (opt) {
 		prom_printf("iommu opt is: %s\n", opt);
 		opt += 6;
 		while (*opt && *opt == ' ')
 			opt++;
-		if (!strncmp(opt, "off", 3))
+		if (!prom_strncmp(opt, "off", 3))
 			prom_iommu_off = 1;
-		else if (!strncmp(opt, "force", 5))
+		else if (!prom_strncmp(opt, "force", 5))
 			prom_iommu_force_on = 1;
 	}
 #endif
-	opt = strstr(prom_cmd_line, "mem=");
+	opt = prom_strstr(prom_cmd_line, "mem=");
 	if (opt) {
 		opt += 4;
 		prom_memory_limit = prom_memparse(opt, (const char **)&opt);
@@ -669,13 +800,13 @@ static void __init early_cmdline_parse(void)
 
 #ifdef CONFIG_PPC_PSERIES
 	prom_radix_disable = !IS_ENABLED(CONFIG_PPC_RADIX_MMU_DEFAULT);
-	opt = strstr(prom_cmd_line, "disable_radix");
+	opt = prom_strstr(prom_cmd_line, "disable_radix");
 	if (opt) {
 		opt += 13;
 		if (*opt && *opt == '=') {
 			bool val;
 
-			if (kstrtobool(++opt, &val))
+			if (prom_strtobool(++opt, &val))
 				prom_radix_disable = false;
 			else
 				prom_radix_disable = val;
@@ -1028,7 +1159,7 @@ static int __init prom_count_smt_threads(void)
 		type[0] = 0;
 		prom_getprop(node, "device_type", type, sizeof(type));
 
-		if (strcmp(type, "cpu"))
+		if (prom_strcmp(type, "cpu"))
 			continue;
 		/*
 		 * There is an entry for each smt thread, each entry being
@@ -1475,7 +1606,7 @@ static void __init prom_init_mem(void)
 			 */
 			prom_getprop(node, "name", type, sizeof(type));
 		}
-		if (strcmp(type, "memory"))
+		if (prom_strcmp(type, "memory"))
 			continue;
 
 		plen = prom_getprop(node, "reg", regbuf, sizeof(regbuf));
@@ -1756,19 +1887,19 @@ static void __init prom_initialize_tce_table(void)
 		prom_getprop(node, "device_type", type, sizeof(type));
 		prom_getprop(node, "model", model, sizeof(model));
 
-		if ((type[0] == 0) || (strstr(type, "pci") == NULL))
+		if ((type[0] == 0) || (prom_strstr(type, "pci") == NULL))
 			continue;
 
 		/* Keep the old logic intact to avoid regression. */
 		if (compatible[0] != 0) {
-			if ((strstr(compatible, "python") == NULL) &&
-			    (strstr(compatible, "Speedwagon") == NULL) &&
-			    (strstr(compatible, "Winnipeg") == NULL))
+			if ((prom_strstr(compatible, "python") == NULL) &&
+			    (prom_strstr(compatible, "Speedwagon") == NULL) &&
+			    (prom_strstr(compatible, "Winnipeg") == NULL))
 				continue;
 		} else if (model[0] != 0) {
-			if ((strstr(model, "ython") == NULL) &&
-			    (strstr(model, "peedwagon") == NULL) &&
-			    (strstr(model, "innipeg") == NULL))
+			if ((prom_strstr(model, "ython") == NULL) &&
+			    (prom_strstr(model, "peedwagon") == NULL) &&
+			    (prom_strstr(model, "innipeg") == NULL))
 				continue;
 		}
 
@@ -1917,12 +2048,12 @@ static void __init prom_hold_cpus(void)
 
 		type[0] = 0;
 		prom_getprop(node, "device_type", type, sizeof(type));
-		if (strcmp(type, "cpu") != 0)
+		if (prom_strcmp(type, "cpu") != 0)
 			continue;
 
 		/* Skip non-configured cpus. */
 		if (prom_getprop(node, "status", type, sizeof(type)) > 0)
-			if (strcmp(type, "okay") != 0)
+			if (prom_strcmp(type, "okay") != 0)
 				continue;
 
 		reg = cpu_to_be32(-1); /* make sparse happy */
@@ -1998,9 +2129,9 @@ static void __init prom_find_mmu(void)
 		return;
 	version[sizeof(version) - 1] = 0;
 	/* XXX might need to add other versions here */
-	if (strcmp(version, "Open Firmware, 1.0.5") == 0)
+	if (prom_strcmp(version, "Open Firmware, 1.0.5") == 0)
 		of_workarounds = OF_WA_CLAIM;
-	else if (strncmp(version, "FirmWorks,3.", 12) == 0) {
+	else if (prom_strncmp(version, "FirmWorks,3.", 12) == 0) {
 		of_workarounds = OF_WA_CLAIM | OF_WA_LONGTRAIL;
 		call_prom("interpret", 1, 1, "dev /memory 0 to allow-reclaim");
 	} else
@@ -2033,7 +2164,7 @@ static void __init prom_init_stdout(void)
 	call_prom("instance-to-path", 3, 1, prom.stdout, path, 255);
 	prom_printf("OF stdout device is: %s\n", of_stdout_device);
 	prom_setprop(prom.chosen, "/chosen", "linux,stdout-path",
-		     path, strlen(path) + 1);
+		     path, prom_strlen(path) + 1);
 
 	/* instance-to-package fails on PA-Semi */
 	stdout_node = call_prom("instance-to-package", 1, 1, prom.stdout);
@@ -2043,7 +2174,7 @@ static void __init prom_init_stdout(void)
 		/* If it's a display, note it */
 		memset(type, 0, sizeof(type));
 		prom_getprop(stdout_node, "device_type", type, sizeof(type));
-		if (strcmp(type, "display") == 0)
+		if (prom_strcmp(type, "display") == 0)
 			prom_setprop(stdout_node, path, "linux,boot-display", NULL, 0);
 	}
 }
@@ -2064,19 +2195,19 @@ static int __init prom_find_machine_type(void)
 		compat[len] = 0;
 		while (i < len) {
 			char *p = &compat[i];
-			int sl = strlen(p);
+			int sl = prom_strlen(p);
 			if (sl == 0)
 				break;
-			if (strstr(p, "Power Macintosh") ||
-			    strstr(p, "MacRISC"))
+			if (prom_strstr(p, "Power Macintosh") ||
+			    prom_strstr(p, "MacRISC"))
 				return PLATFORM_POWERMAC;
 #ifdef CONFIG_PPC64
 			/* We must make sure we don't detect the IBM Cell
 			 * blades as pSeries due to some firmware issues,
 			 * so we do it here.
 			 */
-			if (strstr(p, "IBM,CBEA") ||
-			    strstr(p, "IBM,CPBW-1.0"))
+			if (prom_strstr(p, "IBM,CBEA") ||
+			    prom_strstr(p, "IBM,CPBW-1.0"))
 				return PLATFORM_GENERIC;
 #endif /* CONFIG_PPC64 */
 			i += sl + 1;
@@ -2093,7 +2224,7 @@ static int __init prom_find_machine_type(void)
 			   compat, sizeof(compat)-1);
 	if (len <= 0)
 		return PLATFORM_GENERIC;
-	if (strcmp(compat, "chrp"))
+	if (prom_strcmp(compat, "chrp"))
 		return PLATFORM_GENERIC;
 
 	/* Default to pSeries. We need to know if we are running LPAR */
@@ -2155,7 +2286,7 @@ static void __init prom_check_displays(void)
 	for (node = 0; prom_next_node(&node); ) {
 		memset(type, 0, sizeof(type));
 		prom_getprop(node, "device_type", type, sizeof(type));
-		if (strcmp(type, "display") != 0)
+		if (prom_strcmp(type, "display") != 0)
 			continue;
 
 		/* It seems OF doesn't null-terminate the path :-( */
@@ -2259,9 +2390,9 @@ static unsigned long __init dt_find_string(char *str)
 	s = os = (char *)dt_string_start;
 	s += 4;
 	while (s <  (char *)dt_string_end) {
-		if (strcmp(s, str) == 0)
+		if (prom_strcmp(s, str) == 0)
 			return s - os;
-		s += strlen(s) + 1;
+		s += prom_strlen(s) + 1;
 	}
 	return 0;
 }
@@ -2294,7 +2425,7 @@ static void __init scan_dt_build_strings(phandle node,
 		}
 
  		/* skip "name" */
- 		if (strcmp(namep, "name") == 0) {
+		if (prom_strcmp(namep, "name") == 0) {
  			*mem_start = (unsigned long)namep;
  			prev_name = "name";
  			continue;
@@ -2306,7 +2437,7 @@ static void __init scan_dt_build_strings(phandle node,
 			namep = sstart + soff;
 		} else {
 			/* Trim off some if we can */
-			*mem_start = (unsigned long)namep + strlen(namep) + 1;
+			*mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
 			dt_string_end = *mem_start;
 		}
 		prev_name = namep;
@@ -2375,7 +2506,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 			break;
 
  		/* skip "name" */
- 		if (strcmp(pname, "name") == 0) {
+		if (prom_strcmp(pname, "name") == 0) {
  			prev_name = "name";
  			continue;
  		}
@@ -2406,7 +2537,7 @@ static void __init scan_dt_build_struct(phandle node, unsigned long *mem_start,
 		call_prom("getprop", 4, 1, node, pname, valp, l);
 		*mem_start = _ALIGN(*mem_start, 4);
 
-		if (!strcmp(pname, "phandle"))
+		if (!prom_strcmp(pname, "phandle"))
 			has_phandle = 1;
 	}
 
@@ -2476,8 +2607,8 @@ static void __init flatten_device_tree(void)
 
 	/* Add "phandle" in there, we'll need it */
 	namep = make_room(&mem_start, &mem_end, 16, 1);
-	strcpy(namep, "phandle");
-	mem_start = (unsigned long)namep + strlen(namep) + 1;
+	prom_strcpy(namep, "phandle");
+	mem_start = (unsigned long)namep + prom_strlen(namep) + 1;
 
 	/* Build string array */
 	prom_printf("Building dt strings...\n"); 
@@ -2799,7 +2930,7 @@ static void __init fixup_device_tree_efika(void)
 	rv = prom_getprop(node, "model", prop, sizeof(prop));
 	if (rv == PROM_ERROR)
 		return;
-	if (strcmp(prop, "EFIKA5K2"))
+	if (prom_strcmp(prop, "EFIKA5K2"))
 		return;
 
 	prom_printf("Applying EFIKA device tree fixups\n");
@@ -2807,13 +2938,13 @@ static void __init fixup_device_tree_efika(void)
 	/* Claiming to be 'chrp' is death */
 	node = call_prom("finddevice", 1, 1, ADDR("/"));
 	rv = prom_getprop(node, "device_type", prop, sizeof(prop));
-	if (rv != PROM_ERROR && (strcmp(prop, "chrp") == 0))
+	if (rv != PROM_ERROR && (prom_strcmp(prop, "chrp") == 0))
 		prom_setprop(node, "/", "device_type", "efika", sizeof("efika"));
 
 	/* CODEGEN,description is exposed in /proc/cpuinfo so
 	   fix that too */
 	rv = prom_getprop(node, "CODEGEN,description", prop, sizeof(prop));
-	if (rv != PROM_ERROR && (strstr(prop, "CHRP")))
+	if (rv != PROM_ERROR && (prom_strstr(prop, "CHRP")))
 		prom_setprop(node, "/", "CODEGEN,description",
 			     "Efika 5200B PowerPC System",
 			     sizeof("Efika 5200B PowerPC System"));
diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
index 181fd10008ef..4cac45cb5de5 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -27,7 +27,7 @@ fi
 WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
 _end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
 __secondary_hold_acknowledge __secondary_hold_spinloop __start
-strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
+logo_linux_clut224
 reloc_got2 kernstart_addr memstart_addr linux_banner _stext
 __prom_init_toc_start __prom_init_toc_end btext_setup_display TOC."
 
-- 
2.13.3

[PATCH v9 04/11] powerpc/mm: don't use direct assignation during early boot.

[Christophe Leroy]

In kernel/cputable.c, explicitly use memcpy() instead of *y = *x;
This will allow GCC to replace it with __memcpy() when KASAN is
selected.

Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/cputable.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 1eab54bc6ee9..cd12f362b61f 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -2147,7 +2147,11 @@ void __init set_cur_cpu_spec(struct cpu_spec *s)
 	struct cpu_spec *t = &the_cpu_spec;
 
 	t = PTRRELOC(t);
-	*t = *s;
+	/*
+	 * use memcpy() instead of *t = *s so that GCC replaces it
+	 * by __memcpy() when KASAN is active
+	 */
+	memcpy(t, s, sizeof(*t));
 
 	*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
 }
@@ -2161,8 +2165,11 @@ static struct cpu_spec * __init setup_cpu_spec(unsigned long offset,
 	t = PTRRELOC(t);
 	old = *t;
 
-	/* Copy everything, then do fixups */
-	*t = *s;
+	/*
+	 * Copy everything, then do fixups. Use memcpy() instead of *t = *s
+	 * so that GCC replaces it by __memcpy() when KASAN is active
+	 */
+	memcpy(t, s, sizeof(*t));
 
 	/*
 	 * If we are overriding a previous value derived from the real
-- 
2.13.3

[PATCH v9 04/11] powerpc/mm: don't use direct assignation during early boot.

[Christophe Leroy]

In kernel/cputable.c, explicitly use memcpy() instead of *y = *x;
This will allow GCC to replace it with __memcpy() when KASAN is
selected.

Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/cputable.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
index 1eab54bc6ee9..cd12f362b61f 100644
--- a/arch/powerpc/kernel/cputable.c
+++ b/arch/powerpc/kernel/cputable.c
@@ -2147,7 +2147,11 @@ void __init set_cur_cpu_spec(struct cpu_spec *s)
 	struct cpu_spec *t = &the_cpu_spec;
 
 	t = PTRRELOC(t);
-	*t = *s;
+	/*
+	 * use memcpy() instead of *t = *s so that GCC replaces it
+	 * by __memcpy() when KASAN is active
+	 */
+	memcpy(t, s, sizeof(*t));
 
 	*PTRRELOC(&cur_cpu_spec) = &the_cpu_spec;
 }
@@ -2161,8 +2165,11 @@ static struct cpu_spec * __init setup_cpu_spec(unsigned long offset,
 	t = PTRRELOC(t);
 	old = *t;
 
-	/* Copy everything, then do fixups */
-	*t = *s;
+	/*
+	 * Copy everything, then do fixups. Use memcpy() instead of *t = *s
+	 * so that GCC replaces it by __memcpy() when KASAN is active
+	 */
+	memcpy(t, s, sizeof(*t));
 
 	/*
 	 * If we are overriding a previous value derived from the real
-- 
2.13.3

[PATCH v9 05/11] powerpc/32: use memset() instead of memset_io() to zero BSS

[Christophe Leroy]

Since commit 400c47d81ca38 ("powerpc32: memset: only use dcbz once cache is
enabled"), memset() can be used before activation of the cache,
so no need to use memset_io() for zeroing the BSS.

Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/early_32.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/early_32.c b/arch/powerpc/kernel/early_32.c
index cf3cdd81dc47..3482118ffe76 100644
--- a/arch/powerpc/kernel/early_32.c
+++ b/arch/powerpc/kernel/early_32.c
@@ -21,8 +21,8 @@ notrace unsigned long __init early_init(unsigned long dt_ptr)
 {
 	unsigned long offset = reloc_offset();
 
-	/* First zero the BSS -- use memset_io, some platforms don't have caches on yet */
-	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
+	/* First zero the BSS */
+	memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
 
 	/*
 	 * Identify the CPU type and fix up code sections
-- 
2.13.3

[PATCH v9 05/11] powerpc/32: use memset() instead of memset_io() to zero BSS

[Christophe Leroy]

Since commit 400c47d81ca38 ("powerpc32: memset: only use dcbz once cache is
enabled"), memset() can be used before activation of the cache,
so no need to use memset_io() for zeroing the BSS.

Acked-by: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/early_32.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/early_32.c b/arch/powerpc/kernel/early_32.c
index cf3cdd81dc47..3482118ffe76 100644
--- a/arch/powerpc/kernel/early_32.c
+++ b/arch/powerpc/kernel/early_32.c
@@ -21,8 +21,8 @@ notrace unsigned long __init early_init(unsigned long dt_ptr)
 {
 	unsigned long offset = reloc_offset();
 
-	/* First zero the BSS -- use memset_io, some platforms don't have caches on yet */
-	memset_io((void __iomem *)PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
+	/* First zero the BSS */
+	memset(PTRRELOC(&__bss_start), 0, __bss_stop - __bss_start);
 
 	/*
 	 * Identify the CPU type and fix up code sections
-- 
2.13.3

[PATCH v9 06/11] powerpc/32: make KVIRT_TOP dependent on FIXMAP_START

[Christophe Leroy]

When we add KASAN shadow area, KVIRT_TOP can't be anymore fixed
at 0xfe000000.

This patch uses FIXADDR_START to define KVIRT_TOP.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/book3s/32/pgtable.h | 13 ++++++++++---
 arch/powerpc/include/asm/nohash/32/pgtable.h | 13 ++++++++++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index aa8406b8f7ba..838de59f6754 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -134,15 +134,24 @@ static inline bool pte_user(pte_t pte)
 #define PGDIR_MASK	(~(PGDIR_SIZE-1))
 
 #define USER_PTRS_PER_PGD	(TASK_SIZE / PGDIR_SIZE)
+
+#ifndef __ASSEMBLY__
+
+int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
+
+#endif /* !__ASSEMBLY__ */
+
 /*
  * This is the bottom of the PKMAP area with HIGHMEM or an arbitrary
  * value (for now) on others, from where we can start layout kernel
  * virtual space that goes below PKMAP and FIXMAP
  */
+#include <asm/fixmap.h>
+
 #ifdef CONFIG_HIGHMEM
 #define KVIRT_TOP	PKMAP_BASE
 #else
-#define KVIRT_TOP	(0xfe000000UL)	/* for now, could be FIXMAP_BASE ? */
+#define KVIRT_TOP	FIXADDR_START
 #endif
 
 /*
@@ -373,8 +382,6 @@ static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
 #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) >> 3 })
 #define __swp_entry_to_pte(x)		((pte_t) { (x).val << 3 })
 
-int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
-
 /* Generic accessors to PTE bits */
 static inline int pte_write(pte_t pte)		{ return !!(pte_val(pte) & _PAGE_RW);}
 static inline int pte_read(pte_t pte)		{ return 1; }
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index bed433358260..0284f8f5305f 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -64,15 +64,24 @@ extern int icache_44x_need_flush;
 #define pgd_ERROR(e) \
 	pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 
+#ifndef __ASSEMBLY__
+
+int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
+
+#endif /* !__ASSEMBLY__ */
+
+
 /*
  * This is the bottom of the PKMAP area with HIGHMEM or an arbitrary
  * value (for now) on others, from where we can start layout kernel
  * virtual space that goes below PKMAP and FIXMAP
  */
+#include <asm/fixmap.h>
+
 #ifdef CONFIG_HIGHMEM
 #define KVIRT_TOP	PKMAP_BASE
 #else
-#define KVIRT_TOP	(0xfe000000UL)	/* for now, could be FIXMAP_BASE ? */
+#define KVIRT_TOP	FIXADDR_START
 #endif
 
 /*
@@ -379,8 +388,6 @@ static inline int pte_young(pte_t pte)
 #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) >> 3 })
 #define __swp_entry_to_pte(x)		((pte_t) { (x).val << 3 })
 
-int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
-
 #endif /* !__ASSEMBLY__ */
 
 #endif /* __ASM_POWERPC_NOHASH_32_PGTABLE_H */
-- 
2.13.3

[PATCH v9 06/11] powerpc/32: make KVIRT_TOP dependent on FIXMAP_START

[Christophe Leroy]

When we add KASAN shadow area, KVIRT_TOP can't be anymore fixed
at 0xfe000000.

This patch uses FIXADDR_START to define KVIRT_TOP.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/book3s/32/pgtable.h | 13 ++++++++++---
 arch/powerpc/include/asm/nohash/32/pgtable.h | 13 ++++++++++---
 2 files changed, 20 insertions(+), 6 deletions(-)

diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index aa8406b8f7ba..838de59f6754 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -134,15 +134,24 @@ static inline bool pte_user(pte_t pte)
 #define PGDIR_MASK	(~(PGDIR_SIZE-1))
 
 #define USER_PTRS_PER_PGD	(TASK_SIZE / PGDIR_SIZE)
+
+#ifndef __ASSEMBLY__
+
+int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
+
+#endif /* !__ASSEMBLY__ */
+
 /*
  * This is the bottom of the PKMAP area with HIGHMEM or an arbitrary
  * value (for now) on others, from where we can start layout kernel
  * virtual space that goes below PKMAP and FIXMAP
  */
+#include <asm/fixmap.h>
+
 #ifdef CONFIG_HIGHMEM
 #define KVIRT_TOP	PKMAP_BASE
 #else
-#define KVIRT_TOP	(0xfe000000UL)	/* for now, could be FIXMAP_BASE ? */
+#define KVIRT_TOP	FIXADDR_START
 #endif
 
 /*
@@ -373,8 +382,6 @@ static inline void __ptep_set_access_flags(struct vm_area_struct *vma,
 #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) >> 3 })
 #define __swp_entry_to_pte(x)		((pte_t) { (x).val << 3 })
 
-int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
-
 /* Generic accessors to PTE bits */
 static inline int pte_write(pte_t pte)		{ return !!(pte_val(pte) & _PAGE_RW);}
 static inline int pte_read(pte_t pte)		{ return 1; }
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index bed433358260..0284f8f5305f 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -64,15 +64,24 @@ extern int icache_44x_need_flush;
 #define pgd_ERROR(e) \
 	pr_err("%s:%d: bad pgd %08lx.\n", __FILE__, __LINE__, pgd_val(e))
 
+#ifndef __ASSEMBLY__
+
+int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
+
+#endif /* !__ASSEMBLY__ */
+
+
 /*
  * This is the bottom of the PKMAP area with HIGHMEM or an arbitrary
  * value (for now) on others, from where we can start layout kernel
  * virtual space that goes below PKMAP and FIXMAP
  */
+#include <asm/fixmap.h>
+
 #ifdef CONFIG_HIGHMEM
 #define KVIRT_TOP	PKMAP_BASE
 #else
-#define KVIRT_TOP	(0xfe000000UL)	/* for now, could be FIXMAP_BASE ? */
+#define KVIRT_TOP	FIXADDR_START
 #endif
 
 /*
@@ -379,8 +388,6 @@ static inline int pte_young(pte_t pte)
 #define __pte_to_swp_entry(pte)		((swp_entry_t) { pte_val(pte) >> 3 })
 #define __swp_entry_to_pte(x)		((pte_t) { (x).val << 3 })
 
-int map_kernel_page(unsigned long va, phys_addr_t pa, pgprot_t prot);
-
 #endif /* !__ASSEMBLY__ */
 
 #endif /* __ASM_POWERPC_NOHASH_32_PGTABLE_H */
-- 
2.13.3

[PATCH v9 07/11] powerpc/32: prepare shadow area for KASAN

[Christophe Leroy]

This patch prepares a shadow area for KASAN.

The shadow area will be at the top of the kernel virtual
memory space above the fixmap area and will occupy one
eighth of the total kernel virtual memory space.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig.debug        |  5 +++++
 arch/powerpc/include/asm/fixmap.h |  5 +++++
 arch/powerpc/include/asm/kasan.h  | 16 ++++++++++++++++
 arch/powerpc/mm/mem.c             |  4 ++++
 arch/powerpc/mm/ptdump/ptdump.c   |  8 ++++++++
 5 files changed, 38 insertions(+)

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 4e00cb0a5464..61febbbdd02b 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -366,3 +366,8 @@ config PPC_FAST_ENDIAN_SWITCH
         depends on DEBUG_KERNEL && PPC_BOOK3S_64
         help
 	  If you're unsure what this is, say N.
+
+config KASAN_SHADOW_OFFSET
+	hex
+	depends on KASAN
+	default 0xe0000000
diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h
index b9fbed84ddca..0cfc365d814b 100644
--- a/arch/powerpc/include/asm/fixmap.h
+++ b/arch/powerpc/include/asm/fixmap.h
@@ -22,7 +22,12 @@
 #include <asm/kmap_types.h>
 #endif
 
+#ifdef CONFIG_KASAN
+#include <asm/kasan.h>
+#define FIXADDR_TOP	(KASAN_SHADOW_START - PAGE_SIZE)
+#else
 #define FIXADDR_TOP	((unsigned long)(-PAGE_SIZE))
+#endif
 
 /*
  * Here we define all the compile-time 'special' virtual
diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index c3161b8fc017..8dc1e3819171 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -12,4 +12,20 @@
 #define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
 #endif
 
+#ifndef __ASSEMBLY__
+
+#include <asm/page.h>
+
+#define KASAN_SHADOW_SCALE_SHIFT	3
+
+#define KASAN_SHADOW_OFFSET	ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET)
+
+#define KASAN_SHADOW_START	(KASAN_SHADOW_OFFSET + \
+				 (PAGE_OFFSET >> KASAN_SHADOW_SCALE_SHIFT))
+
+#define KASAN_SHADOW_END	0UL
+
+#define KASAN_SHADOW_SIZE	(KASAN_SHADOW_END - KASAN_SHADOW_START)
+
+#endif /* __ASSEMBLY */
 #endif
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index f6787f90e158..4e7fa4eb2dd3 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -309,6 +309,10 @@ void __init mem_init(void)
 	mem_init_print_info(NULL);
 #ifdef CONFIG_PPC32
 	pr_info("Kernel virtual memory layout:\n");
+#ifdef CONFIG_KASAN
+	pr_info("  * 0x%08lx..0x%08lx  : kasan shadow mem\n",
+		KASAN_SHADOW_START, KASAN_SHADOW_END);
+#endif
 	pr_info("  * 0x%08lx..0x%08lx  : fixmap\n", FIXADDR_START, FIXADDR_TOP);
 #ifdef CONFIG_HIGHMEM
 	pr_info("  * 0x%08lx..0x%08lx  : highmem PTEs\n",
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c
index 37138428ab55..812ed680024f 100644
--- a/arch/powerpc/mm/ptdump/ptdump.c
+++ b/arch/powerpc/mm/ptdump/ptdump.c
@@ -101,6 +101,10 @@ static struct addr_marker address_markers[] = {
 	{ 0,	"Fixmap start" },
 	{ 0,	"Fixmap end" },
 #endif
+#ifdef CONFIG_KASAN
+	{ 0,	"kasan shadow mem start" },
+	{ 0,	"kasan shadow mem end" },
+#endif
 	{ -1,	NULL },
 };
 
@@ -322,6 +326,10 @@ static void populate_markers(void)
 #endif
 	address_markers[i++].start_address = FIXADDR_START;
 	address_markers[i++].start_address = FIXADDR_TOP;
+#ifdef CONFIG_KASAN
+	address_markers[i++].start_address = KASAN_SHADOW_START;
+	address_markers[i++].start_address = KASAN_SHADOW_END;
+#endif
 #endif /* CONFIG_PPC64 */
 }
 
-- 
2.13.3

[PATCH v9 07/11] powerpc/32: prepare shadow area for KASAN

[Christophe Leroy]

This patch prepares a shadow area for KASAN.

The shadow area will be at the top of the kernel virtual
memory space above the fixmap area and will occupy one
eighth of the total kernel virtual memory space.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig.debug        |  5 +++++
 arch/powerpc/include/asm/fixmap.h |  5 +++++
 arch/powerpc/include/asm/kasan.h  | 16 ++++++++++++++++
 arch/powerpc/mm/mem.c             |  4 ++++
 arch/powerpc/mm/ptdump/ptdump.c   |  8 ++++++++
 5 files changed, 38 insertions(+)

diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index 4e00cb0a5464..61febbbdd02b 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -366,3 +366,8 @@ config PPC_FAST_ENDIAN_SWITCH
         depends on DEBUG_KERNEL && PPC_BOOK3S_64
         help
 	  If you're unsure what this is, say N.
+
+config KASAN_SHADOW_OFFSET
+	hex
+	depends on KASAN
+	default 0xe0000000
diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h
index b9fbed84ddca..0cfc365d814b 100644
--- a/arch/powerpc/include/asm/fixmap.h
+++ b/arch/powerpc/include/asm/fixmap.h
@@ -22,7 +22,12 @@
 #include <asm/kmap_types.h>
 #endif
 
+#ifdef CONFIG_KASAN
+#include <asm/kasan.h>
+#define FIXADDR_TOP	(KASAN_SHADOW_START - PAGE_SIZE)
+#else
 #define FIXADDR_TOP	((unsigned long)(-PAGE_SIZE))
+#endif
 
 /*
  * Here we define all the compile-time 'special' virtual
diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index c3161b8fc017..8dc1e3819171 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -12,4 +12,20 @@
 #define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
 #endif
 
+#ifndef __ASSEMBLY__
+
+#include <asm/page.h>
+
+#define KASAN_SHADOW_SCALE_SHIFT	3
+
+#define KASAN_SHADOW_OFFSET	ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET)
+
+#define KASAN_SHADOW_START	(KASAN_SHADOW_OFFSET + \
+				 (PAGE_OFFSET >> KASAN_SHADOW_SCALE_SHIFT))
+
+#define KASAN_SHADOW_END	0UL
+
+#define KASAN_SHADOW_SIZE	(KASAN_SHADOW_END - KASAN_SHADOW_START)
+
+#endif /* __ASSEMBLY */
 #endif
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index f6787f90e158..4e7fa4eb2dd3 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -309,6 +309,10 @@ void __init mem_init(void)
 	mem_init_print_info(NULL);
 #ifdef CONFIG_PPC32
 	pr_info("Kernel virtual memory layout:\n");
+#ifdef CONFIG_KASAN
+	pr_info("  * 0x%08lx..0x%08lx  : kasan shadow mem\n",
+		KASAN_SHADOW_START, KASAN_SHADOW_END);
+#endif
 	pr_info("  * 0x%08lx..0x%08lx  : fixmap\n", FIXADDR_START, FIXADDR_TOP);
 #ifdef CONFIG_HIGHMEM
 	pr_info("  * 0x%08lx..0x%08lx  : highmem PTEs\n",
diff --git a/arch/powerpc/mm/ptdump/ptdump.c b/arch/powerpc/mm/ptdump/ptdump.c
index 37138428ab55..812ed680024f 100644
--- a/arch/powerpc/mm/ptdump/ptdump.c
+++ b/arch/powerpc/mm/ptdump/ptdump.c
@@ -101,6 +101,10 @@ static struct addr_marker address_markers[] = {
 	{ 0,	"Fixmap start" },
 	{ 0,	"Fixmap end" },
 #endif
+#ifdef CONFIG_KASAN
+	{ 0,	"kasan shadow mem start" },
+	{ 0,	"kasan shadow mem end" },
+#endif
 	{ -1,	NULL },
 };
 
@@ -322,6 +326,10 @@ static void populate_markers(void)
 #endif
 	address_markers[i++].start_address = FIXADDR_START;
 	address_markers[i++].start_address = FIXADDR_TOP;
+#ifdef CONFIG_KASAN
+	address_markers[i++].start_address = KASAN_SHADOW_START;
+	address_markers[i++].start_address = KASAN_SHADOW_END;
+#endif
 #endif /* CONFIG_PPC64 */
 }
 
-- 
2.13.3

[PATCH v9 08/11] powerpc: disable KASAN instrumentation on early/critical files.

[Christophe Leroy]

All files containing functions run before kasan_early_init() is called
must have KASAN instrumentation disabled.

For those file, branch profiling also have to be disabled otherwise
each if () generates a call to ftrace_likely_update().

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/Makefile             | 12 ++++++++++++
 arch/powerpc/lib/Makefile                |  8 ++++++++
 arch/powerpc/mm/Makefile                 |  6 ++++++
 arch/powerpc/platforms/powermac/Makefile |  6 ++++++
 arch/powerpc/purgatory/Makefile          |  3 +++
 arch/powerpc/xmon/Makefile               |  1 +
 6 files changed, 36 insertions(+)

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 45e47752b692..0ea6c4aa3a20 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -31,6 +31,18 @@ CFLAGS_REMOVE_btext.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_prom.o = $(CC_FLAGS_FTRACE)
 endif
 
+KASAN_SANITIZE_early_32.o := n
+KASAN_SANITIZE_cputable.o := n
+KASAN_SANITIZE_prom_init.o := n
+KASAN_SANITIZE_btext.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_early_32.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
+endif
+
 obj-y				:= cputable.o ptrace.o syscalls.o \
 				   irq.o align.o signal_32.o pmc.o vdso.o \
 				   process.o systbl.o idle.o \
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 47a4de434c22..c55f9c27bf79 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -8,6 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
 CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
 
+KASAN_SANITIZE_code-patching.o := n
+KASAN_SANITIZE_feature-fixups.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
+endif
+
 obj-y += alloc.o code-patching.o feature-fixups.o
 
 ifndef CONFIG_KASAN
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index d52ec118e09d..240d73dce6bb 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -7,6 +7,12 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
 
 CFLAGS_REMOVE_slb.o = $(CC_FLAGS_FTRACE)
 
+KASAN_SANITIZE_ppc_mmu_32.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_ppc_mmu_32.o  		+= -DDISABLE_BRANCH_PROFILING
+endif
+
 obj-y				:= fault.o mem.o pgtable.o mmap.o \
 				   init_$(BITS).o pgtable_$(BITS).o \
 				   init-common.o mmu_context.o drmem.o
diff --git a/arch/powerpc/platforms/powermac/Makefile b/arch/powerpc/platforms/powermac/Makefile
index 923bfb340433..859efbacdf06 100644
--- a/arch/powerpc/platforms/powermac/Makefile
+++ b/arch/powerpc/platforms/powermac/Makefile
@@ -2,6 +2,12 @@
 CFLAGS_bootx_init.o  		+= -fPIC
 CFLAGS_bootx_init.o  		+= $(call cc-option, -fno-stack-protector)
 
+KASAN_SANITIZE_bootx_init.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_bootx_init.o  		+= -DDISABLE_BRANCH_PROFILING
+endif
+
 ifdef CONFIG_FUNCTION_TRACER
 # Do not trace early boot code
 CFLAGS_REMOVE_bootx_init.o = $(CC_FLAGS_FTRACE)
diff --git a/arch/powerpc/purgatory/Makefile b/arch/powerpc/purgatory/Makefile
index 4314ba5baf43..7c6d8b14f440 100644
--- a/arch/powerpc/purgatory/Makefile
+++ b/arch/powerpc/purgatory/Makefile
@@ -1,4 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
+
+KASAN_SANITIZE := n
+
 targets += trampoline.o purgatory.ro kexec-purgatory.c
 
 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile
index 3050f9323254..f142570ad860 100644
--- a/arch/powerpc/xmon/Makefile
+++ b/arch/powerpc/xmon/Makefile
@@ -7,6 +7,7 @@ subdir-ccflags-y := $(call cc-disable-warning, builtin-requires-header)
 GCOV_PROFILE := n
 KCOV_INSTRUMENT := n
 UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
 
 # Disable ftrace for the entire directory
 ORIG_CFLAGS := $(KBUILD_CFLAGS)
-- 
2.13.3

[PATCH v9 08/11] powerpc: disable KASAN instrumentation on early/critical files.

[Christophe Leroy]

All files containing functions run before kasan_early_init() is called
must have KASAN instrumentation disabled.

For those file, branch profiling also have to be disabled otherwise
each if () generates a call to ftrace_likely_update().

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/Makefile             | 12 ++++++++++++
 arch/powerpc/lib/Makefile                |  8 ++++++++
 arch/powerpc/mm/Makefile                 |  6 ++++++
 arch/powerpc/platforms/powermac/Makefile |  6 ++++++
 arch/powerpc/purgatory/Makefile          |  3 +++
 arch/powerpc/xmon/Makefile               |  1 +
 6 files changed, 36 insertions(+)

diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 45e47752b692..0ea6c4aa3a20 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -31,6 +31,18 @@ CFLAGS_REMOVE_btext.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_prom.o = $(CC_FLAGS_FTRACE)
 endif
 
+KASAN_SANITIZE_early_32.o := n
+KASAN_SANITIZE_cputable.o := n
+KASAN_SANITIZE_prom_init.o := n
+KASAN_SANITIZE_btext.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_early_32.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_cputable.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_prom_init.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_btext.o += -DDISABLE_BRANCH_PROFILING
+endif
+
 obj-y				:= cputable.o ptrace.o syscalls.o \
 				   irq.o align.o signal_32.o pmc.o vdso.o \
 				   process.o systbl.o idle.o \
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 47a4de434c22..c55f9c27bf79 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -8,6 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
 CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
 CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
 
+KASAN_SANITIZE_code-patching.o := n
+KASAN_SANITIZE_feature-fixups.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_code-patching.o += -DDISABLE_BRANCH_PROFILING
+CFLAGS_feature-fixups.o += -DDISABLE_BRANCH_PROFILING
+endif
+
 obj-y += alloc.o code-patching.o feature-fixups.o
 
 ifndef CONFIG_KASAN
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index d52ec118e09d..240d73dce6bb 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -7,6 +7,12 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
 
 CFLAGS_REMOVE_slb.o = $(CC_FLAGS_FTRACE)
 
+KASAN_SANITIZE_ppc_mmu_32.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_ppc_mmu_32.o  		+= -DDISABLE_BRANCH_PROFILING
+endif
+
 obj-y				:= fault.o mem.o pgtable.o mmap.o \
 				   init_$(BITS).o pgtable_$(BITS).o \
 				   init-common.o mmu_context.o drmem.o
diff --git a/arch/powerpc/platforms/powermac/Makefile b/arch/powerpc/platforms/powermac/Makefile
index 923bfb340433..859efbacdf06 100644
--- a/arch/powerpc/platforms/powermac/Makefile
+++ b/arch/powerpc/platforms/powermac/Makefile
@@ -2,6 +2,12 @@
 CFLAGS_bootx_init.o  		+= -fPIC
 CFLAGS_bootx_init.o  		+= $(call cc-option, -fno-stack-protector)
 
+KASAN_SANITIZE_bootx_init.o := n
+
+ifdef CONFIG_KASAN
+CFLAGS_bootx_init.o  		+= -DDISABLE_BRANCH_PROFILING
+endif
+
 ifdef CONFIG_FUNCTION_TRACER
 # Do not trace early boot code
 CFLAGS_REMOVE_bootx_init.o = $(CC_FLAGS_FTRACE)
diff --git a/arch/powerpc/purgatory/Makefile b/arch/powerpc/purgatory/Makefile
index 4314ba5baf43..7c6d8b14f440 100644
--- a/arch/powerpc/purgatory/Makefile
+++ b/arch/powerpc/purgatory/Makefile
@@ -1,4 +1,7 @@
 # SPDX-License-Identifier: GPL-2.0
+
+KASAN_SANITIZE := n
+
 targets += trampoline.o purgatory.ro kexec-purgatory.c
 
 LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined
diff --git a/arch/powerpc/xmon/Makefile b/arch/powerpc/xmon/Makefile
index 3050f9323254..f142570ad860 100644
--- a/arch/powerpc/xmon/Makefile
+++ b/arch/powerpc/xmon/Makefile
@@ -7,6 +7,7 @@ subdir-ccflags-y := $(call cc-disable-warning, builtin-requires-header)
 GCOV_PROFILE := n
 KCOV_INSTRUMENT := n
 UBSAN_SANITIZE := n
+KASAN_SANITIZE := n
 
 # Disable ftrace for the entire directory
 ORIG_CFLAGS := $(KBUILD_CFLAGS)
-- 
2.13.3

[PATCH v9 09/11] powerpc/32: Add KASAN support

[Christophe Leroy]

This patch adds KASAN support for PPC32. The following patch
will add an early activation of hash table for book3s. Until
then, a warning will be raised if trying to use KASAN on an
hash 6xx.

To support KASAN, this patch initialises that MMU mapings for
accessing to the KASAN shadow area defined in a previous patch.

An early mapping is set as soon as the kernel code has been
relocated at its definitive place.

Then the definitive mapping is set once paging is initialised.

For modules, the shadow area is allocated at module_alloc().

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig                  |   1 +
 arch/powerpc/include/asm/kasan.h      |   7 ++
 arch/powerpc/kernel/head_32.S         |   3 +
 arch/powerpc/kernel/head_40x.S        |   3 +
 arch/powerpc/kernel/head_44x.S        |   3 +
 arch/powerpc/kernel/head_8xx.S        |   3 +
 arch/powerpc/kernel/head_fsl_booke.S  |   3 +
 arch/powerpc/kernel/setup-common.c    |   3 +
 arch/powerpc/mm/Makefile              |   1 +
 arch/powerpc/mm/kasan/Makefile        |   5 ++
 arch/powerpc/mm/kasan/kasan_init_32.c | 152 ++++++++++++++++++++++++++++++++++
 11 files changed, 184 insertions(+)
 create mode 100644 arch/powerpc/mm/kasan/Makefile
 create mode 100644 arch/powerpc/mm/kasan/kasan_init_32.c

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 652c25260838..8d6108c83299 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -172,6 +172,7 @@ config PPC
 	select GENERIC_TIME_VSYSCALL
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_JUMP_LABEL
+	select HAVE_ARCH_KASAN			if PPC32
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_MMAP_RND_BITS
 	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index 8dc1e3819171..74a4ba9fb8a3 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -27,5 +27,12 @@
 
 #define KASAN_SHADOW_SIZE	(KASAN_SHADOW_END - KASAN_SHADOW_START)
 
+#ifdef CONFIG_KASAN
+void kasan_early_init(void);
+void kasan_init(void);
+#else
+static inline void kasan_init(void) { }
+#endif
+
 #endif /* __ASSEMBLY */
 #endif
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index ce6a972f2584..02229c005853 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -952,6 +952,9 @@ start_here:
  * Do early platform-specific initialization,
  * and set up the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index a9c934f2319b..efa219d2136e 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -848,6 +848,9 @@ start_here:
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 37117ab11584..34a5df827b38 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -203,6 +203,9 @@ _ENTRY(_start);
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 03c73b4c6435..d25adb6ef235 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -853,6 +853,9 @@ start_here:
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 1881127682e9..0fc38eb957b7 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -275,6 +275,9 @@ set_ivor:
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	mr	r3,r30
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index e7534f306c8e..3c6c5a43901e 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -67,6 +67,7 @@
 #include <asm/livepatch.h>
 #include <asm/mmu_context.h>
 #include <asm/cpu_has_feature.h>
+#include <asm/kasan.h>
 
 #include "setup.h"
 
@@ -865,6 +866,8 @@ static void smp_setup_pacas(void)
  */
 void __init setup_arch(char **cmdline_p)
 {
+	kasan_init();
+
 	*cmdline_p = boot_command_line;
 
 	/* Set a half-reasonable default so udelay does something sensible */
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 240d73dce6bb..80382a2d169b 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_PPC_COPRO_BASE)	+= copro_fault.o
 obj-$(CONFIG_SPAPR_TCE_IOMMU)	+= mmu_context_iommu.o
 obj-$(CONFIG_PPC_PTDUMP)	+= ptdump/
 obj-$(CONFIG_PPC_MEM_KEYS)	+= pkeys.o
+obj-$(CONFIG_KASAN)		+= kasan/
 
 # Disable kcov instrumentation on sensitive code
 # This is necessary for booting with kcov enabled on book3e machines
diff --git a/arch/powerpc/mm/kasan/Makefile b/arch/powerpc/mm/kasan/Makefile
new file mode 100644
index 000000000000..6577897673dd
--- /dev/null
+++ b/arch/powerpc/mm/kasan/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+KASAN_SANITIZE := n
+
+obj-$(CONFIG_PPC32)           += kasan_init_32.o
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c
new file mode 100644
index 000000000000..cc788917ce38
--- /dev/null
+++ b/arch/powerpc/mm/kasan/kasan_init_32.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define DISABLE_BRANCH_PROFILING
+
+#include <linux/kasan.h>
+#include <linux/printk.h>
+#include <linux/memblock.h>
+#include <linux/sched/task.h>
+#include <linux/vmalloc.h>
+#include <asm/pgalloc.h>
+#include <asm/code-patching.h>
+#include <mm/mmu_decl.h>
+
+static void kasan_populate_pte(pte_t *ptep, pgprot_t prot)
+{
+	unsigned long va = (unsigned long)kasan_early_shadow_page;
+	phys_addr_t pa = __pa(kasan_early_shadow_page);
+	int i;
+
+	for (i = 0; i < PTRS_PER_PTE; i++, ptep++)
+		__set_pte_at(&init_mm, va, ptep, pfn_pte(PHYS_PFN(pa), prot), 0);
+}
+
+static int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end)
+{
+	pmd_t *pmd;
+	unsigned long k_cur, k_next;
+
+	pmd = pmd_offset(pud_offset(pgd_offset_k(k_start), k_start), k_start);
+
+	for (k_cur = k_start; k_cur != k_end; k_cur = k_next, pmd++) {
+		pte_t *new;
+
+		k_next = pgd_addr_end(k_cur, k_end);
+		if ((void *)pmd_page_vaddr(*pmd) != kasan_early_shadow_pte)
+			continue;
+
+		new = pte_alloc_one_kernel(&init_mm);
+
+		if (!new)
+			return -ENOMEM;
+		kasan_populate_pte(new, PAGE_KERNEL_RO);
+		pmd_populate_kernel(&init_mm, pmd, new);
+	}
+	return 0;
+}
+
+static void __ref *kasan_get_one_page(void)
+{
+	if (slab_is_available())
+		return (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+
+	return memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+}
+
+static int __ref kasan_init_region(void *start, size_t size)
+{
+	unsigned long k_start = (unsigned long)kasan_mem_to_shadow(start);
+	unsigned long k_end = (unsigned long)kasan_mem_to_shadow(start + size);
+	unsigned long k_cur;
+	pmd_t *pmd;
+	void *block = NULL;
+	int ret = kasan_init_shadow_page_tables(k_start, k_end);
+
+	if (ret)
+		return ret;
+
+	if (!slab_is_available())
+		block = memblock_alloc(k_end - k_start, PAGE_SIZE);
+
+	for (k_cur = k_start; k_cur < k_end; k_cur += PAGE_SIZE) {
+		void *va = block ? block + k_cur - k_start : kasan_get_one_page();
+		pte_t pte = pfn_pte(PHYS_PFN(__pa(va)), PAGE_KERNEL);
+
+		if (!va)
+			return -ENOMEM;
+
+		pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
+		__set_pte_at(&init_mm, k_cur, pte_offset_kernel(pmd, k_cur), pte, 0);
+	}
+	flush_tlb_kernel_range(k_start, k_end);
+	return 0;
+}
+
+static void __init kasan_remap_early_shadow_ro(void)
+{
+	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL_RO);
+	flush_tlb_kernel_range(KASAN_SHADOW_START, KASAN_SHADOW_END);
+}
+
+void __init kasan_init(void)
+{
+	int ret;
+	struct memblock_region *reg;
+
+	for_each_memblock(memory, reg) {
+		phys_addr_t base = reg->base;
+		phys_addr_t top = min(base + reg->size, total_lowmem);
+
+		if (base >= top)
+			continue;
+
+		ret = kasan_init_region(__va(base), top - base);
+		if (ret)
+			panic("kasan: kasan_init_region() failed");
+	}
+
+	kasan_remap_early_shadow_ro();
+
+	clear_page(kasan_early_shadow_page);
+
+	/* At this point kasan is fully initialized. Enable error messages */
+	init_task.kasan_depth = 0;
+	pr_info("KASAN init done\n");
+}
+
+#ifdef CONFIG_MODULES
+void *module_alloc(unsigned long size)
+{
+	void *base = vmalloc_exec(size);
+
+	if (!base)
+		return NULL;
+
+	if (!kasan_init_region(base, size))
+		return base;
+
+	vfree(base);
+
+	return NULL;
+}
+#endif
+
+void __init kasan_early_init(void)
+{
+	unsigned long addr = KASAN_SHADOW_START;
+	unsigned long end = KASAN_SHADOW_END;
+	unsigned long next;
+	pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(addr), addr), addr);
+
+	BUILD_BUG_ON(KASAN_SHADOW_START & ~PGDIR_MASK);
+
+	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL);
+
+	do {
+		next = pgd_addr_end(addr, end);
+		pmd_populate_kernel(&init_mm, pmd, kasan_early_shadow_pte);
+	} while (pmd++, addr = next, addr != end);
+
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+		WARN(1, "KASAN not supported on hash 6xx");
+}
-- 
2.13.3

[PATCH v9 09/11] powerpc/32: Add KASAN support

[Christophe Leroy]

This patch adds KASAN support for PPC32. The following patch
will add an early activation of hash table for book3s. Until
then, a warning will be raised if trying to use KASAN on an
hash 6xx.

To support KASAN, this patch initialises that MMU mapings for
accessing to the KASAN shadow area defined in a previous patch.

An early mapping is set as soon as the kernel code has been
relocated at its definitive place.

Then the definitive mapping is set once paging is initialised.

For modules, the shadow area is allocated at module_alloc().

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/Kconfig                  |   1 +
 arch/powerpc/include/asm/kasan.h      |   7 ++
 arch/powerpc/kernel/head_32.S         |   3 +
 arch/powerpc/kernel/head_40x.S        |   3 +
 arch/powerpc/kernel/head_44x.S        |   3 +
 arch/powerpc/kernel/head_8xx.S        |   3 +
 arch/powerpc/kernel/head_fsl_booke.S  |   3 +
 arch/powerpc/kernel/setup-common.c    |   3 +
 arch/powerpc/mm/Makefile              |   1 +
 arch/powerpc/mm/kasan/Makefile        |   5 ++
 arch/powerpc/mm/kasan/kasan_init_32.c | 152 ++++++++++++++++++++++++++++++++++
 11 files changed, 184 insertions(+)
 create mode 100644 arch/powerpc/mm/kasan/Makefile
 create mode 100644 arch/powerpc/mm/kasan/kasan_init_32.c

diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 652c25260838..8d6108c83299 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -172,6 +172,7 @@ config PPC
 	select GENERIC_TIME_VSYSCALL
 	select HAVE_ARCH_AUDITSYSCALL
 	select HAVE_ARCH_JUMP_LABEL
+	select HAVE_ARCH_KASAN			if PPC32
 	select HAVE_ARCH_KGDB
 	select HAVE_ARCH_MMAP_RND_BITS
 	select HAVE_ARCH_MMAP_RND_COMPAT_BITS	if COMPAT
diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index 8dc1e3819171..74a4ba9fb8a3 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -27,5 +27,12 @@
 
 #define KASAN_SHADOW_SIZE	(KASAN_SHADOW_END - KASAN_SHADOW_START)
 
+#ifdef CONFIG_KASAN
+void kasan_early_init(void);
+void kasan_init(void);
+#else
+static inline void kasan_init(void) { }
+#endif
+
 #endif /* __ASSEMBLY */
 #endif
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index ce6a972f2584..02229c005853 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -952,6 +952,9 @@ start_here:
  * Do early platform-specific initialization,
  * and set up the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index a9c934f2319b..efa219d2136e 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -848,6 +848,9 @@ start_here:
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index 37117ab11584..34a5df827b38 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -203,6 +203,9 @@ _ENTRY(_start);
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 03c73b4c6435..d25adb6ef235 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -853,6 +853,9 @@ start_here:
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	li	r3,0
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 1881127682e9..0fc38eb957b7 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -275,6 +275,9 @@ set_ivor:
 /*
  * Decide what sort of machine this is and initialize the MMU.
  */
+#ifdef CONFIG_KASAN
+	bl	kasan_early_init
+#endif
 	mr	r3,r30
 	mr	r4,r31
 	bl	machine_init
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index e7534f306c8e..3c6c5a43901e 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -67,6 +67,7 @@
 #include <asm/livepatch.h>
 #include <asm/mmu_context.h>
 #include <asm/cpu_has_feature.h>
+#include <asm/kasan.h>
 
 #include "setup.h"
 
@@ -865,6 +866,8 @@ static void smp_setup_pacas(void)
  */
 void __init setup_arch(char **cmdline_p)
 {
+	kasan_init();
+
 	*cmdline_p = boot_command_line;
 
 	/* Set a half-reasonable default so udelay does something sensible */
diff --git a/arch/powerpc/mm/Makefile b/arch/powerpc/mm/Makefile
index 240d73dce6bb..80382a2d169b 100644
--- a/arch/powerpc/mm/Makefile
+++ b/arch/powerpc/mm/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_PPC_COPRO_BASE)	+= copro_fault.o
 obj-$(CONFIG_SPAPR_TCE_IOMMU)	+= mmu_context_iommu.o
 obj-$(CONFIG_PPC_PTDUMP)	+= ptdump/
 obj-$(CONFIG_PPC_MEM_KEYS)	+= pkeys.o
+obj-$(CONFIG_KASAN)		+= kasan/
 
 # Disable kcov instrumentation on sensitive code
 # This is necessary for booting with kcov enabled on book3e machines
diff --git a/arch/powerpc/mm/kasan/Makefile b/arch/powerpc/mm/kasan/Makefile
new file mode 100644
index 000000000000..6577897673dd
--- /dev/null
+++ b/arch/powerpc/mm/kasan/Makefile
@@ -0,0 +1,5 @@
+# SPDX-License-Identifier: GPL-2.0
+
+KASAN_SANITIZE := n
+
+obj-$(CONFIG_PPC32)           += kasan_init_32.o
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c
new file mode 100644
index 000000000000..cc788917ce38
--- /dev/null
+++ b/arch/powerpc/mm/kasan/kasan_init_32.c
@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: GPL-2.0
+
+#define DISABLE_BRANCH_PROFILING
+
+#include <linux/kasan.h>
+#include <linux/printk.h>
+#include <linux/memblock.h>
+#include <linux/sched/task.h>
+#include <linux/vmalloc.h>
+#include <asm/pgalloc.h>
+#include <asm/code-patching.h>
+#include <mm/mmu_decl.h>
+
+static void kasan_populate_pte(pte_t *ptep, pgprot_t prot)
+{
+	unsigned long va = (unsigned long)kasan_early_shadow_page;
+	phys_addr_t pa = __pa(kasan_early_shadow_page);
+	int i;
+
+	for (i = 0; i < PTRS_PER_PTE; i++, ptep++)
+		__set_pte_at(&init_mm, va, ptep, pfn_pte(PHYS_PFN(pa), prot), 0);
+}
+
+static int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end)
+{
+	pmd_t *pmd;
+	unsigned long k_cur, k_next;
+
+	pmd = pmd_offset(pud_offset(pgd_offset_k(k_start), k_start), k_start);
+
+	for (k_cur = k_start; k_cur != k_end; k_cur = k_next, pmd++) {
+		pte_t *new;
+
+		k_next = pgd_addr_end(k_cur, k_end);
+		if ((void *)pmd_page_vaddr(*pmd) != kasan_early_shadow_pte)
+			continue;
+
+		new = pte_alloc_one_kernel(&init_mm);
+
+		if (!new)
+			return -ENOMEM;
+		kasan_populate_pte(new, PAGE_KERNEL_RO);
+		pmd_populate_kernel(&init_mm, pmd, new);
+	}
+	return 0;
+}
+
+static void __ref *kasan_get_one_page(void)
+{
+	if (slab_is_available())
+		return (void *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+
+	return memblock_alloc(PAGE_SIZE, PAGE_SIZE);
+}
+
+static int __ref kasan_init_region(void *start, size_t size)
+{
+	unsigned long k_start = (unsigned long)kasan_mem_to_shadow(start);
+	unsigned long k_end = (unsigned long)kasan_mem_to_shadow(start + size);
+	unsigned long k_cur;
+	pmd_t *pmd;
+	void *block = NULL;
+	int ret = kasan_init_shadow_page_tables(k_start, k_end);
+
+	if (ret)
+		return ret;
+
+	if (!slab_is_available())
+		block = memblock_alloc(k_end - k_start, PAGE_SIZE);
+
+	for (k_cur = k_start; k_cur < k_end; k_cur += PAGE_SIZE) {
+		void *va = block ? block + k_cur - k_start : kasan_get_one_page();
+		pte_t pte = pfn_pte(PHYS_PFN(__pa(va)), PAGE_KERNEL);
+
+		if (!va)
+			return -ENOMEM;
+
+		pmd = pmd_offset(pud_offset(pgd_offset_k(k_cur), k_cur), k_cur);
+		__set_pte_at(&init_mm, k_cur, pte_offset_kernel(pmd, k_cur), pte, 0);
+	}
+	flush_tlb_kernel_range(k_start, k_end);
+	return 0;
+}
+
+static void __init kasan_remap_early_shadow_ro(void)
+{
+	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL_RO);
+	flush_tlb_kernel_range(KASAN_SHADOW_START, KASAN_SHADOW_END);
+}
+
+void __init kasan_init(void)
+{
+	int ret;
+	struct memblock_region *reg;
+
+	for_each_memblock(memory, reg) {
+		phys_addr_t base = reg->base;
+		phys_addr_t top = min(base + reg->size, total_lowmem);
+
+		if (base >= top)
+			continue;
+
+		ret = kasan_init_region(__va(base), top - base);
+		if (ret)
+			panic("kasan: kasan_init_region() failed");
+	}
+
+	kasan_remap_early_shadow_ro();
+
+	clear_page(kasan_early_shadow_page);
+
+	/* At this point kasan is fully initialized. Enable error messages */
+	init_task.kasan_depth = 0;
+	pr_info("KASAN init done\n");
+}
+
+#ifdef CONFIG_MODULES
+void *module_alloc(unsigned long size)
+{
+	void *base = vmalloc_exec(size);
+
+	if (!base)
+		return NULL;
+
+	if (!kasan_init_region(base, size))
+		return base;
+
+	vfree(base);
+
+	return NULL;
+}
+#endif
+
+void __init kasan_early_init(void)
+{
+	unsigned long addr = KASAN_SHADOW_START;
+	unsigned long end = KASAN_SHADOW_END;
+	unsigned long next;
+	pmd_t *pmd = pmd_offset(pud_offset(pgd_offset_k(addr), addr), addr);
+
+	BUILD_BUG_ON(KASAN_SHADOW_START & ~PGDIR_MASK);
+
+	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL);
+
+	do {
+		next = pgd_addr_end(addr, end);
+		pmd_populate_kernel(&init_mm, pmd, kasan_early_shadow_pte);
+	} while (pmd++, addr = next, addr != end);
+
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+		WARN(1, "KASAN not supported on hash 6xx");
+}
-- 
2.13.3

[PATCH v9 10/11] powerpc/32s: move hash code patching out of MMU_init_hw()

[Christophe Leroy]

For KASAN, hash table handling will be activated early for
accessing to KASAN shadow areas.

In order to avoid any modification of the hash functions while
they are still used with the early hash table, the code patching
is moved out of MMU_init_hw() and put close to the big-bang switch
to the final hash table.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/head_32.S |  3 +++
 arch/powerpc/mm/mmu_decl.h    |  1 +
 arch/powerpc/mm/ppc_mmu_32.c  | 36 ++++++++++++++++++++++--------------
 3 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 02229c005853..e644aab2cf5b 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -960,6 +960,9 @@ start_here:
 	bl	machine_init
 	bl	__save_cpu_setup
 	bl	MMU_init
+BEGIN_MMU_FTR_SECTION
+	bl	MMU_init_hw_patch
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
 
 /*
  * Go back to running unmapped so we can load up new values
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index 74ff61dabcb1..d726ff776054 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -130,6 +130,7 @@ extern void wii_memory_fixups(void);
  */
 #ifdef CONFIG_PPC32
 extern void MMU_init_hw(void);
+void MMU_init_hw_patch(void);
 unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
 #endif
 
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 2d5b0d50fb31..38c0e28c21e1 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -39,6 +39,7 @@
 struct hash_pte *Hash, *Hash_end;
 unsigned long Hash_size, Hash_mask;
 unsigned long _SDR1;
+static unsigned int hash_mb, hash_mb2;
 
 struct ppc_bat BATS[8][2];	/* 8 pairs of IBAT, DBAT */
 
@@ -308,7 +309,6 @@ void hash_preload(struct mm_struct *mm, unsigned long ea,
  */
 void __init MMU_init_hw(void)
 {
-	unsigned int hmask, mb, mb2;
 	unsigned int n_hpteg, lg_n_hpteg;
 
 	if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
@@ -349,20 +349,30 @@ void __init MMU_init_hw(void)
 	       (unsigned long long)(total_memory >> 20), Hash_size >> 10, Hash);
 
 
-	/*
-	 * Patch up the instructions in hashtable.S:create_hpte
-	 */
-	if ( ppc_md.progress ) ppc_md.progress("hash:patch", 0x345);
 	Hash_mask = n_hpteg - 1;
-	hmask = Hash_mask >> (16 - LG_HPTEG_SIZE);
-	mb2 = mb = 32 - LG_HPTEG_SIZE - lg_n_hpteg;
+	hash_mb2 = hash_mb = 32 - LG_HPTEG_SIZE - lg_n_hpteg;
 	if (lg_n_hpteg > 16)
-		mb2 = 16 - LG_HPTEG_SIZE;
+		hash_mb2 = 16 - LG_HPTEG_SIZE;
+}
+
+void __init MMU_init_hw_patch(void)
+{
+	unsigned int hmask = Hash_mask >> (16 - LG_HPTEG_SIZE);
 
+	if (ppc_md.progress)
+		ppc_md.progress("hash:patch", 0x345);
+	if (ppc_md.progress)
+		ppc_md.progress("hash:done", 0x205);
+
+	/* WARNING: Make sure nothing can trigger a KASAN check past this point */
+
+	/*
+	 * Patch up the instructions in hashtable.S:create_hpte
+	 */
 	modify_instruction_site(&patch__hash_page_A0, 0xffff,
 				((unsigned int)Hash - PAGE_OFFSET) >> 16);
-	modify_instruction_site(&patch__hash_page_A1, 0x7c0, mb << 6);
-	modify_instruction_site(&patch__hash_page_A2, 0x7c0, mb2 << 6);
+	modify_instruction_site(&patch__hash_page_A1, 0x7c0, hash_mb << 6);
+	modify_instruction_site(&patch__hash_page_A2, 0x7c0, hash_mb2 << 6);
 	modify_instruction_site(&patch__hash_page_B, 0xffff, hmask);
 	modify_instruction_site(&patch__hash_page_C, 0xffff, hmask);
 
@@ -371,11 +381,9 @@ void __init MMU_init_hw(void)
 	 */
 	modify_instruction_site(&patch__flush_hash_A0, 0xffff,
 				((unsigned int)Hash - PAGE_OFFSET) >> 16);
-	modify_instruction_site(&patch__flush_hash_A1, 0x7c0, mb << 6);
-	modify_instruction_site(&patch__flush_hash_A2, 0x7c0, mb2 << 6);
+	modify_instruction_site(&patch__flush_hash_A1, 0x7c0, hash_mb << 6);
+	modify_instruction_site(&patch__flush_hash_A2, 0x7c0, hash_mb2 << 6);
 	modify_instruction_site(&patch__flush_hash_B, 0xffff, hmask);
-
-	if ( ppc_md.progress ) ppc_md.progress("hash:done", 0x205);
 }
 
 void setup_initial_memory_limit(phys_addr_t first_memblock_base,
-- 
2.13.3

[PATCH v9 10/11] powerpc/32s: move hash code patching out of MMU_init_hw()

[Christophe Leroy]

For KASAN, hash table handling will be activated early for
accessing to KASAN shadow areas.

In order to avoid any modification of the hash functions while
they are still used with the early hash table, the code patching
is moved out of MMU_init_hw() and put close to the big-bang switch
to the final hash table.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/kernel/head_32.S |  3 +++
 arch/powerpc/mm/mmu_decl.h    |  1 +
 arch/powerpc/mm/ppc_mmu_32.c  | 36 ++++++++++++++++++++++--------------
 3 files changed, 26 insertions(+), 14 deletions(-)

diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 02229c005853..e644aab2cf5b 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -960,6 +960,9 @@ start_here:
 	bl	machine_init
 	bl	__save_cpu_setup
 	bl	MMU_init
+BEGIN_MMU_FTR_SECTION
+	bl	MMU_init_hw_patch
+END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
 
 /*
  * Go back to running unmapped so we can load up new values
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index 74ff61dabcb1..d726ff776054 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -130,6 +130,7 @@ extern void wii_memory_fixups(void);
  */
 #ifdef CONFIG_PPC32
 extern void MMU_init_hw(void);
+void MMU_init_hw_patch(void);
 unsigned long mmu_mapin_ram(unsigned long base, unsigned long top);
 #endif
 
diff --git a/arch/powerpc/mm/ppc_mmu_32.c b/arch/powerpc/mm/ppc_mmu_32.c
index 2d5b0d50fb31..38c0e28c21e1 100644
--- a/arch/powerpc/mm/ppc_mmu_32.c
+++ b/arch/powerpc/mm/ppc_mmu_32.c
@@ -39,6 +39,7 @@
 struct hash_pte *Hash, *Hash_end;
 unsigned long Hash_size, Hash_mask;
 unsigned long _SDR1;
+static unsigned int hash_mb, hash_mb2;
 
 struct ppc_bat BATS[8][2];	/* 8 pairs of IBAT, DBAT */
 
@@ -308,7 +309,6 @@ void hash_preload(struct mm_struct *mm, unsigned long ea,
  */
 void __init MMU_init_hw(void)
 {
-	unsigned int hmask, mb, mb2;
 	unsigned int n_hpteg, lg_n_hpteg;
 
 	if (!mmu_has_feature(MMU_FTR_HPTE_TABLE))
@@ -349,20 +349,30 @@ void __init MMU_init_hw(void)
 	       (unsigned long long)(total_memory >> 20), Hash_size >> 10, Hash);
 
 
-	/*
-	 * Patch up the instructions in hashtable.S:create_hpte
-	 */
-	if ( ppc_md.progress ) ppc_md.progress("hash:patch", 0x345);
 	Hash_mask = n_hpteg - 1;
-	hmask = Hash_mask >> (16 - LG_HPTEG_SIZE);
-	mb2 = mb = 32 - LG_HPTEG_SIZE - lg_n_hpteg;
+	hash_mb2 = hash_mb = 32 - LG_HPTEG_SIZE - lg_n_hpteg;
 	if (lg_n_hpteg > 16)
-		mb2 = 16 - LG_HPTEG_SIZE;
+		hash_mb2 = 16 - LG_HPTEG_SIZE;
+}
+
+void __init MMU_init_hw_patch(void)
+{
+	unsigned int hmask = Hash_mask >> (16 - LG_HPTEG_SIZE);
 
+	if (ppc_md.progress)
+		ppc_md.progress("hash:patch", 0x345);
+	if (ppc_md.progress)
+		ppc_md.progress("hash:done", 0x205);
+
+	/* WARNING: Make sure nothing can trigger a KASAN check past this point */
+
+	/*
+	 * Patch up the instructions in hashtable.S:create_hpte
+	 */
 	modify_instruction_site(&patch__hash_page_A0, 0xffff,
 				((unsigned int)Hash - PAGE_OFFSET) >> 16);
-	modify_instruction_site(&patch__hash_page_A1, 0x7c0, mb << 6);
-	modify_instruction_site(&patch__hash_page_A2, 0x7c0, mb2 << 6);
+	modify_instruction_site(&patch__hash_page_A1, 0x7c0, hash_mb << 6);
+	modify_instruction_site(&patch__hash_page_A2, 0x7c0, hash_mb2 << 6);
 	modify_instruction_site(&patch__hash_page_B, 0xffff, hmask);
 	modify_instruction_site(&patch__hash_page_C, 0xffff, hmask);
 
@@ -371,11 +381,9 @@ void __init MMU_init_hw(void)
 	 */
 	modify_instruction_site(&patch__flush_hash_A0, 0xffff,
 				((unsigned int)Hash - PAGE_OFFSET) >> 16);
-	modify_instruction_site(&patch__flush_hash_A1, 0x7c0, mb << 6);
-	modify_instruction_site(&patch__flush_hash_A2, 0x7c0, mb2 << 6);
+	modify_instruction_site(&patch__flush_hash_A1, 0x7c0, hash_mb << 6);
+	modify_instruction_site(&patch__flush_hash_A2, 0x7c0, hash_mb2 << 6);
 	modify_instruction_site(&patch__flush_hash_B, 0xffff, hmask);
-
-	if ( ppc_md.progress ) ppc_md.progress("hash:done", 0x205);
 }
 
 void setup_initial_memory_limit(phys_addr_t first_memblock_base,
-- 
2.13.3

[PATCH v9 11/11] powerpc/32s: set up an early static hash table for KASAN.

[Christophe Leroy]

KASAN requires early activation of hash table, before memblock()
functions are available.

This patch implements an early hash_table statically defined in
__initdata.

During early boot, a single page table is used.

For hash32, when doing the final init, one page table is allocated
for each PGD entry because of the _PAGE_HASHPTE flag which can't be
common to several virt pages. This is done after memblock get
available but before switching to the final hash table, otherwise
there are issues with TLB flushing due to the shared entries.

For hash32, the zero shadow page gets mapped with PAGE_READONLY instead
of PAGE_KERNEL_RO, because the PP bits don't provide a RO kernel, so
PAGE_KERNEL_RO is equivalent to PAGE_KERNEL. By using PAGE_READONLY,
the page is RO for both kernel and user, but this is not a security issue
as it contains only zeroes.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/kasan.h      |  1 +
 arch/powerpc/kernel/head_32.S         | 43 ++++++++++++++++++++++-------
 arch/powerpc/mm/kasan/kasan_init_32.c | 51 ++++++++++++++++++++++++++++++-----
 arch/powerpc/mm/mmu_decl.h            |  1 +
 4 files changed, 79 insertions(+), 17 deletions(-)

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index 74a4ba9fb8a3..c9fe0369a8fc 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -29,6 +29,7 @@
 
 #ifdef CONFIG_KASAN
 void kasan_early_init(void);
+void kasan_mmu_init(void);
 void kasan_init(void);
 #else
 static inline void kasan_init(void) { }
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index e644aab2cf5b..7f7fbdd73b79 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -160,6 +160,10 @@ __after_mmu_off:
 	bl	flush_tlbs
 
 	bl	initial_bats
+	bl	load_segment_registers
+#ifdef CONFIG_KASAN
+	bl	early_hash_table
+#endif
 #if defined(CONFIG_BOOTX_TEXT)
 	bl	setup_disp_bat
 #endif
@@ -205,7 +209,7 @@ __after_mmu_off:
  */
 turn_on_mmu:
 	mfmsr	r0
-	ori	r0,r0,MSR_DR|MSR_IR
+	ori	r0,r0,MSR_DR|MSR_IR|MSR_RI
 	mtspr	SPRN_SRR1,r0
 	lis	r0,start_here@h
 	ori	r0,r0,start_here@l
@@ -881,11 +885,24 @@ _ENTRY(__restore_cpu_setup)
 	blr
 #endif /* !defined(CONFIG_PPC_BOOK3S_32) */
 
-
 /*
  * Load stuff into the MMU.  Intended to be called with
  * IR=0 and DR=0.
  */
+#ifdef CONFIG_KASAN
+early_hash_table:
+	sync			/* Force all PTE updates to finish */
+	isync
+	tlbia			/* Clear all TLB entries */
+	sync			/* wait for tlbia/tlbie to finish */
+	TLBSYNC			/* ... on all CPUs */
+	/* Load the SDR1 register (hash table base & size) */
+	lis	r6, early_hash - PAGE_OFFSET@h
+	ori	r6, r6, 3	/* 256kB table */
+	mtspr	SPRN_SDR1, r6
+	blr
+#endif
+
 load_up_mmu:
 	sync			/* Force all PTE updates to finish */
 	isync
@@ -897,14 +914,6 @@ load_up_mmu:
 	tophys(r6,r6)
 	lwz	r6,_SDR1@l(r6)
 	mtspr	SPRN_SDR1,r6
-	li	r0,16		/* load up segment register values */
-	mtctr	r0		/* for context 0 */
-	lis	r3,0x2000	/* Ku = 1, VSID = 0 */
-	li	r4,0
-3:	mtsrin	r3,r4
-	addi	r3,r3,0x111	/* increment VSID */
-	addis	r4,r4,0x1000	/* address of next segment */
-	bdnz	3b
 
 /* Load the BAT registers with the values set up by MMU_init.
    MMU_init takes care of whether we're on a 601 or not. */
@@ -926,6 +935,17 @@ BEGIN_MMU_FTR_SECTION
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
 	blr
 
+load_segment_registers:
+	li	r0, 16		/* load up segment register values */
+	mtctr	r0		/* for context 0 */
+	lis	r3, 0x2000	/* Ku = 1, VSID = 0 */
+	li	r4, 0
+3:	mtsrin	r3, r4
+	addi	r3, r3, 0x111	/* increment VSID */
+	addis	r4, r4, 0x1000	/* address of next segment */
+	bdnz	3b
+	blr
+
 /*
  * This is where the main kernel code starts.
  */
@@ -961,6 +981,9 @@ start_here:
 	bl	__save_cpu_setup
 	bl	MMU_init
 BEGIN_MMU_FTR_SECTION
+#ifdef CONFIG_KASAN
+	bl	kasan_mmu_init
+#endif
 	bl	MMU_init_hw_patch
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
 
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c
index cc788917ce38..f6dbc537c051 100644
--- a/arch/powerpc/mm/kasan/kasan_init_32.c
+++ b/arch/powerpc/mm/kasan/kasan_init_32.c
@@ -39,7 +39,10 @@ static int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_
 
 		if (!new)
 			return -ENOMEM;
-		kasan_populate_pte(new, PAGE_KERNEL_RO);
+		if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+			kasan_populate_pte(new, PAGE_READONLY);
+		else
+			kasan_populate_pte(new, PAGE_KERNEL_RO);
 		pmd_populate_kernel(&init_mm, pmd, new);
 	}
 	return 0;
@@ -60,10 +63,13 @@ static int __ref kasan_init_region(void *start, size_t size)
 	unsigned long k_cur;
 	pmd_t *pmd;
 	void *block = NULL;
-	int ret = kasan_init_shadow_page_tables(k_start, k_end);
 
-	if (ret)
-		return ret;
+	if (!early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
+		int ret = kasan_init_shadow_page_tables(k_start, k_end);
+
+		if (ret)
+			return ret;
+	}
 
 	if (!slab_is_available())
 		block = memblock_alloc(k_end - k_start, PAGE_SIZE);
@@ -84,15 +90,26 @@ static int __ref kasan_init_region(void *start, size_t size)
 
 static void __init kasan_remap_early_shadow_ro(void)
 {
-	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL_RO);
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+		kasan_populate_pte(kasan_early_shadow_pte, PAGE_READONLY);
+	else
+		kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL_RO);
+
 	flush_tlb_kernel_range(KASAN_SHADOW_START, KASAN_SHADOW_END);
 }
 
-void __init kasan_init(void)
+void __init kasan_mmu_init(void)
 {
 	int ret;
 	struct memblock_region *reg;
 
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
+		ret = kasan_init_shadow_page_tables(KASAN_SHADOW_START, KASAN_SHADOW_END);
+
+		if (ret)
+			panic("kasan: kasan_init_shadow_page_tables() failed");
+	}
+
 	for_each_memblock(memory, reg) {
 		phys_addr_t base = reg->base;
 		phys_addr_t top = min(base + reg->size, total_lowmem);
@@ -104,6 +121,12 @@ void __init kasan_init(void)
 		if (ret)
 			panic("kasan: kasan_init_region() failed");
 	}
+}
+
+void __init kasan_init(void)
+{
+	if (!early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+		kasan_mmu_init();
 
 	kasan_remap_early_shadow_ro();
 
@@ -131,6 +154,20 @@ void *module_alloc(unsigned long size)
 }
 #endif
 
+#ifdef CONFIG_PPC_BOOK3S_32
+u8 __initdata early_hash[256 << 10] __aligned(256 << 10) = {0};
+
+static void __init kasan_early_hash_table(void)
+{
+	modify_instruction_site(&patch__hash_page_A0, 0xffff, __pa(early_hash) >> 16);
+	modify_instruction_site(&patch__flush_hash_A0, 0xffff, __pa(early_hash) >> 16);
+
+	Hash = (struct hash_pte *)early_hash;
+}
+#else
+static void __init kasan_early_hash_table(void) {}
+#endif
+
 void __init kasan_early_init(void)
 {
 	unsigned long addr = KASAN_SHADOW_START;
@@ -148,5 +185,5 @@ void __init kasan_early_init(void)
 	} while (pmd++, addr = next, addr != end);
 
 	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
-		WARN(1, "KASAN not supported on hash 6xx");
+		kasan_early_hash_table();
 }
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index d726ff776054..31fce3914ddc 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -106,6 +106,7 @@ extern unsigned int rtas_data, rtas_size;
 struct hash_pte;
 extern struct hash_pte *Hash, *Hash_end;
 extern unsigned long Hash_size, Hash_mask;
+extern u8 early_hash[];
 
 #endif /* CONFIG_PPC32 */
 
-- 
2.13.3

[PATCH v9 11/11] powerpc/32s: set up an early static hash table for KASAN.

[Christophe Leroy]

KASAN requires early activation of hash table, before memblock()
functions are available.

This patch implements an early hash_table statically defined in
__initdata.

During early boot, a single page table is used.

For hash32, when doing the final init, one page table is allocated
for each PGD entry because of the _PAGE_HASHPTE flag which can't be
common to several virt pages. This is done after memblock get
available but before switching to the final hash table, otherwise
there are issues with TLB flushing due to the shared entries.

For hash32, the zero shadow page gets mapped with PAGE_READONLY instead
of PAGE_KERNEL_RO, because the PP bits don't provide a RO kernel, so
PAGE_KERNEL_RO is equivalent to PAGE_KERNEL. By using PAGE_READONLY,
the page is RO for both kernel and user, but this is not a security issue
as it contains only zeroes.

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
 arch/powerpc/include/asm/kasan.h      |  1 +
 arch/powerpc/kernel/head_32.S         | 43 ++++++++++++++++++++++-------
 arch/powerpc/mm/kasan/kasan_init_32.c | 51 ++++++++++++++++++++++++++++++-----
 arch/powerpc/mm/mmu_decl.h            |  1 +
 4 files changed, 79 insertions(+), 17 deletions(-)

diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
index 74a4ba9fb8a3..c9fe0369a8fc 100644
--- a/arch/powerpc/include/asm/kasan.h
+++ b/arch/powerpc/include/asm/kasan.h
@@ -29,6 +29,7 @@
 
 #ifdef CONFIG_KASAN
 void kasan_early_init(void);
+void kasan_mmu_init(void);
 void kasan_init(void);
 #else
 static inline void kasan_init(void) { }
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index e644aab2cf5b..7f7fbdd73b79 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -160,6 +160,10 @@ __after_mmu_off:
 	bl	flush_tlbs
 
 	bl	initial_bats
+	bl	load_segment_registers
+#ifdef CONFIG_KASAN
+	bl	early_hash_table
+#endif
 #if defined(CONFIG_BOOTX_TEXT)
 	bl	setup_disp_bat
 #endif
@@ -205,7 +209,7 @@ __after_mmu_off:
  */
 turn_on_mmu:
 	mfmsr	r0
-	ori	r0,r0,MSR_DR|MSR_IR
+	ori	r0,r0,MSR_DR|MSR_IR|MSR_RI
 	mtspr	SPRN_SRR1,r0
 	lis	r0,start_here@h
 	ori	r0,r0,start_here@l
@@ -881,11 +885,24 @@ _ENTRY(__restore_cpu_setup)
 	blr
 #endif /* !defined(CONFIG_PPC_BOOK3S_32) */
 
-
 /*
  * Load stuff into the MMU.  Intended to be called with
  * IR=0 and DR=0.
  */
+#ifdef CONFIG_KASAN
+early_hash_table:
+	sync			/* Force all PTE updates to finish */
+	isync
+	tlbia			/* Clear all TLB entries */
+	sync			/* wait for tlbia/tlbie to finish */
+	TLBSYNC			/* ... on all CPUs */
+	/* Load the SDR1 register (hash table base & size) */
+	lis	r6, early_hash - PAGE_OFFSET@h
+	ori	r6, r6, 3	/* 256kB table */
+	mtspr	SPRN_SDR1, r6
+	blr
+#endif
+
 load_up_mmu:
 	sync			/* Force all PTE updates to finish */
 	isync
@@ -897,14 +914,6 @@ load_up_mmu:
 	tophys(r6,r6)
 	lwz	r6,_SDR1@l(r6)
 	mtspr	SPRN_SDR1,r6
-	li	r0,16		/* load up segment register values */
-	mtctr	r0		/* for context 0 */
-	lis	r3,0x2000	/* Ku = 1, VSID = 0 */
-	li	r4,0
-3:	mtsrin	r3,r4
-	addi	r3,r3,0x111	/* increment VSID */
-	addis	r4,r4,0x1000	/* address of next segment */
-	bdnz	3b
 
 /* Load the BAT registers with the values set up by MMU_init.
    MMU_init takes care of whether we're on a 601 or not. */
@@ -926,6 +935,17 @@ BEGIN_MMU_FTR_SECTION
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_USE_HIGH_BATS)
 	blr
 
+load_segment_registers:
+	li	r0, 16		/* load up segment register values */
+	mtctr	r0		/* for context 0 */
+	lis	r3, 0x2000	/* Ku = 1, VSID = 0 */
+	li	r4, 0
+3:	mtsrin	r3, r4
+	addi	r3, r3, 0x111	/* increment VSID */
+	addis	r4, r4, 0x1000	/* address of next segment */
+	bdnz	3b
+	blr
+
 /*
  * This is where the main kernel code starts.
  */
@@ -961,6 +981,9 @@ start_here:
 	bl	__save_cpu_setup
 	bl	MMU_init
 BEGIN_MMU_FTR_SECTION
+#ifdef CONFIG_KASAN
+	bl	kasan_mmu_init
+#endif
 	bl	MMU_init_hw_patch
 END_MMU_FTR_SECTION_IFSET(MMU_FTR_HPTE_TABLE)
 
diff --git a/arch/powerpc/mm/kasan/kasan_init_32.c b/arch/powerpc/mm/kasan/kasan_init_32.c
index cc788917ce38..f6dbc537c051 100644
--- a/arch/powerpc/mm/kasan/kasan_init_32.c
+++ b/arch/powerpc/mm/kasan/kasan_init_32.c
@@ -39,7 +39,10 @@ static int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_
 
 		if (!new)
 			return -ENOMEM;
-		kasan_populate_pte(new, PAGE_KERNEL_RO);
+		if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+			kasan_populate_pte(new, PAGE_READONLY);
+		else
+			kasan_populate_pte(new, PAGE_KERNEL_RO);
 		pmd_populate_kernel(&init_mm, pmd, new);
 	}
 	return 0;
@@ -60,10 +63,13 @@ static int __ref kasan_init_region(void *start, size_t size)
 	unsigned long k_cur;
 	pmd_t *pmd;
 	void *block = NULL;
-	int ret = kasan_init_shadow_page_tables(k_start, k_end);
 
-	if (ret)
-		return ret;
+	if (!early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
+		int ret = kasan_init_shadow_page_tables(k_start, k_end);
+
+		if (ret)
+			return ret;
+	}
 
 	if (!slab_is_available())
 		block = memblock_alloc(k_end - k_start, PAGE_SIZE);
@@ -84,15 +90,26 @@ static int __ref kasan_init_region(void *start, size_t size)
 
 static void __init kasan_remap_early_shadow_ro(void)
 {
-	kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL_RO);
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+		kasan_populate_pte(kasan_early_shadow_pte, PAGE_READONLY);
+	else
+		kasan_populate_pte(kasan_early_shadow_pte, PAGE_KERNEL_RO);
+
 	flush_tlb_kernel_range(KASAN_SHADOW_START, KASAN_SHADOW_END);
 }
 
-void __init kasan_init(void)
+void __init kasan_mmu_init(void)
 {
 	int ret;
 	struct memblock_region *reg;
 
+	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE)) {
+		ret = kasan_init_shadow_page_tables(KASAN_SHADOW_START, KASAN_SHADOW_END);
+
+		if (ret)
+			panic("kasan: kasan_init_shadow_page_tables() failed");
+	}
+
 	for_each_memblock(memory, reg) {
 		phys_addr_t base = reg->base;
 		phys_addr_t top = min(base + reg->size, total_lowmem);
@@ -104,6 +121,12 @@ void __init kasan_init(void)
 		if (ret)
 			panic("kasan: kasan_init_region() failed");
 	}
+}
+
+void __init kasan_init(void)
+{
+	if (!early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
+		kasan_mmu_init();
 
 	kasan_remap_early_shadow_ro();
 
@@ -131,6 +154,20 @@ void *module_alloc(unsigned long size)
 }
 #endif
 
+#ifdef CONFIG_PPC_BOOK3S_32
+u8 __initdata early_hash[256 << 10] __aligned(256 << 10) = {0};
+
+static void __init kasan_early_hash_table(void)
+{
+	modify_instruction_site(&patch__hash_page_A0, 0xffff, __pa(early_hash) >> 16);
+	modify_instruction_site(&patch__flush_hash_A0, 0xffff, __pa(early_hash) >> 16);
+
+	Hash = (struct hash_pte *)early_hash;
+}
+#else
+static void __init kasan_early_hash_table(void) {}
+#endif
+
 void __init kasan_early_init(void)
 {
 	unsigned long addr = KASAN_SHADOW_START;
@@ -148,5 +185,5 @@ void __init kasan_early_init(void)
 	} while (pmd++, addr = next, addr != end);
 
 	if (early_mmu_has_feature(MMU_FTR_HPTE_TABLE))
-		WARN(1, "KASAN not supported on hash 6xx");
+		kasan_early_hash_table();
 }
diff --git a/arch/powerpc/mm/mmu_decl.h b/arch/powerpc/mm/mmu_decl.h
index d726ff776054..31fce3914ddc 100644
--- a/arch/powerpc/mm/mmu_decl.h
+++ b/arch/powerpc/mm/mmu_decl.h
@@ -106,6 +106,7 @@ extern unsigned int rtas_data, rtas_size;
 struct hash_pte;
 extern struct hash_pte *Hash, *Hash_end;
 extern unsigned long Hash_size, Hash_mask;
+extern u8 early_hash[];
 
 #endif /* CONFIG_PPC32 */
 
-- 
2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Daniel Axtens]

Hi Christophe,
> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
> new file mode 100644
> index 000000000000..c3161b8fc017
> --- /dev/null
> +++ b/arch/powerpc/include/asm/kasan.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __ASM_KASAN_H
> +#define __ASM_KASAN_H
> +
> +#ifdef CONFIG_KASAN
> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)

I'm having some trouble with this. I get warnings like this:

WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.

It seems to be related to the export line, as if I swap the exports to
do fn before __##fn I get:

WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.

I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
This works - no warning:

EXPORT_SYMBOL(memset)
EXPORT_SYMBOL(__memset)

This throws a warning:

EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)

I notice in looking at the diff of preprocessed source we end up
invoking an asm macro that doesn't seem to have a full final argument, I
wonder if that's relevant...

-___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
+___EXPORT_SYMBOL __memset, __memset,
+___EXPORT_SYMBOL memset, memset,

I also notice that nowhere else in the source do people have multiple
EXPORT_SYMBOLs on the same line, and other arches seem to just
unconditionally export both symbols on multiple lines.

I have no idea how this works for you - maybe it's affected by something 32bit.

How would you feel about this approach instead? I'm not tied to any of
the names or anything.

diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index e0637730a8e7..7b6a91b448dd 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -214,6 +214,9 @@ name: \
 
 #define DOTSYM(a)      a
 
+#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
+       .weak weakname ; .set weakname, strongname ;
+
 #else
 
 #define XGLUE(a,b) a##b
@@ -236,6 +239,10 @@ GLUE(.,name):
 
 #define DOTSYM(a)      GLUE(.,a)
 
+#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
+       .weak weakname ; .set weakname, strongname ; \
+       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
+
 #endif
 
 #else /* 32-bit */
@@ -251,6 +258,9 @@ GLUE(.,name):
 
 #define _GLOBAL_TOC(name) _GLOBAL(name)
 
+#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
+       .weak weakname ; .set weakname, strongname ;
+
 #endif
 
 /*
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
 EXPORT_SYMBOL(__memset64)
 #endif
 
-_GLOBAL_KASAN(memset)
+PROVIDE_WEAK_ALIAS(__memset,memset)
+_GLOBAL(__memset)
        neg     r0,r3
        rlwimi  r4,r4,8,16,23
        andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
@@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
 10:    bflr    31
        stb     r4,0(r6)
        blr
-EXPORT_SYMBOL_KASAN(memset)
+EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL(__memset)
 
-_GLOBAL_TOC_KASAN(memmove)
+PROVIDE_WEAK_ALIAS(__memmove,memove)
+_GLOBAL_TOC(__memmove)
        cmplw   0,r3,r4
        bgt     backwards_memcpy
        b       memcpy
@@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
        beq     2b
        mtctr   r7
        b       1b
-EXPORT_SYMBOL_KASAN(memmove)
+EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL(__memmove)
diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
index 862b515b8868..7c1b09556cad 100644
--- a/arch/powerpc/lib/memcpy_64.S
+++ b/arch/powerpc/lib/memcpy_64.S
@@ -19,7 +19,8 @@
 #endif
 
        .align  7
-_GLOBAL_TOC_KASAN(memcpy)
+PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
+_GLOBAL_TOC(__memcpy)
 BEGIN_FTR_SECTION
 #ifdef __LITTLE_ENDIAN__
        cmpdi   cr7,r5,0
@@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
        blr
 #endif
-EXPORT_SYMBOL_KASAN(memcpy)
+EXPORT_SYMBOL(__memcpy)
+EXPORT_SYMBOL(memcpy)


Regards,
Daniel


> +#else
> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
> +#endif
> +
> +#endif
> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
> index 1647de15a31e..9bf6dffb4090 100644
> --- a/arch/powerpc/include/asm/string.h
> +++ b/arch/powerpc/include/asm/string.h
> @@ -4,14 +4,17 @@
>  
>  #ifdef __KERNEL__
>  
> +#ifndef CONFIG_KASAN
>  #define __HAVE_ARCH_STRNCPY
>  #define __HAVE_ARCH_STRNCMP
> +#define __HAVE_ARCH_MEMCHR
> +#define __HAVE_ARCH_MEMCMP
> +#define __HAVE_ARCH_MEMSET16
> +#endif
> +
>  #define __HAVE_ARCH_MEMSET
>  #define __HAVE_ARCH_MEMCPY
>  #define __HAVE_ARCH_MEMMOVE
> -#define __HAVE_ARCH_MEMCMP
> -#define __HAVE_ARCH_MEMCHR
> -#define __HAVE_ARCH_MEMSET16
>  #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>  
>  extern char * strcpy(char *,const char *);
> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>  extern void * memchr(const void *,int,__kernel_size_t);
>  extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>  
> +void *__memset(void *s, int c, __kernel_size_t count);
> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
> +void *__memmove(void *to, const void *from, __kernel_size_t n);
> +
> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
> +/*
> + * For files that are not instrumented (e.g. mm/slub.c) we
> + * should use not instrumented version of mem* functions.
> + */
> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
> +#define memmove(dst, src, len) __memmove(dst, src, len)
> +#define memset(s, c, n) __memset(s, c, n)
> +
> +#ifndef __NO_FORTIFY
> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
> +#endif
> +
> +#endif
> +
>  #ifdef CONFIG_PPC64
> +#ifndef CONFIG_KASAN
>  #define __HAVE_ARCH_MEMSET32
>  #define __HAVE_ARCH_MEMSET64
>  
> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>  {
>  	return __memset64(p, v, n * 8);
>  }
> +#endif
>  #else
> +#ifndef CONFIG_KASAN
>  #define __HAVE_ARCH_STRLEN
> +#endif
>  
>  extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>  #endif
> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
> index 667df97d2595..181fd10008ef 100644
> --- a/arch/powerpc/kernel/prom_init_check.sh
> +++ b/arch/powerpc/kernel/prom_init_check.sh
> @@ -16,8 +16,16 @@
>  # If you really need to reference something from prom_init.o add
>  # it to the list below:
>  
> +grep "^CONFIG_KASAN=y$" .config >/dev/null
> +if [ $? -eq 0 ]
> +then
> +	MEM_FUNCS="__memcpy __memset"
> +else
> +	MEM_FUNCS="memcpy memset"
> +fi
> +
>  WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
> -_end enter_prom memcpy memset reloc_offset __secondary_hold
> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>  __secondary_hold_acknowledge __secondary_hold_spinloop __start
>  strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>  reloc_got2 kernstart_addr memstart_addr linux_banner _stext
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 79396e184bca..47a4de434c22 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>  CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>  CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>  
> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
> +obj-y += alloc.o code-patching.o feature-fixups.o
>  
> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
> +ifndef CONFIG_KASAN
> +obj-y	+=	string.o memcmp_$(BITS).o
> +obj-$(CONFIG_PPC32)	+= strlen_32.o
> +endif
> +
> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>  
>  obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>  
> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>  					   test_emulate_step_exec_instr.o
>  
>  obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
> -			   string_$(BITS).o memcmp_$(BITS).o
> +			   string_$(BITS).o
>  
>  obj-y			+= sstep.o ldstfp.o quad.o
>  obj64-y			+= quad.o
> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
> index ba66846fe973..fc4fa7246200 100644
> --- a/arch/powerpc/lib/copy_32.S
> +++ b/arch/powerpc/lib/copy_32.S
> @@ -14,6 +14,7 @@
>  #include <asm/ppc_asm.h>
>  #include <asm/export.h>
>  #include <asm/code-patching-asm.h>
> +#include <asm/kasan.h>
>  
>  #define COPY_16_BYTES		\
>  	lwz	r7,4(r4);	\
> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>  LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>  CACHELINE_MASK = (L1_CACHE_BYTES-1)
>  
> +#ifndef CONFIG_KASAN
>  _GLOBAL(memset16)
>  	rlwinm.	r0 ,r5, 31, 1, 31
>  	addi	r6, r3, -4
> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>  	sth	r4, 4(r6)
>  	blr
>  EXPORT_SYMBOL(memset16)
> +#endif
>  
>  /*
>   * Use dcbz on the complete cache lines in the destination
> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>   * We therefore skip the optimised bloc that uses dcbz. This jump is
>   * replaced by a nop once cache is active. This is done in machine_init()
>   */
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>  	cmplwi	0,r5,4
>  	blt	7f
>  
> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>  9:	stbu	r4,1(r6)
>  	bdnz	9b
>  	blr
> -EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>  
>  /*
>   * This version uses dcbz on the complete cache lines in the
> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>   * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>   * replaced by a nop once cache is active. This is done in machine_init()
>   */
> -_GLOBAL(memmove)
> +_GLOBAL_KASAN(memmove)
>  	cmplw	0,r3,r4
>  	bgt	backwards_memcpy
>  	/* fall through */
>  
> -_GLOBAL(memcpy)
> +_GLOBAL_KASAN(memcpy)
>  1:	b	generic_memcpy
>  	patch_site	1b, patch__memcpy_nocache
>  
> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>  	stbu	r0,1(r6)
>  	bdnz	40b
>  65:	blr
> -EXPORT_SYMBOL(memcpy)
> -EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL_KASAN(memmove)
>  
>  generic_memcpy:
>  	srwi.	r7,r5,3
> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
> index 3c3be02f33b7..7cd6cf6822a2 100644
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -12,7 +12,9 @@
>  #include <asm/errno.h>
>  #include <asm/ppc_asm.h>
>  #include <asm/export.h>
> +#include <asm/kasan.h>
>  
> +#ifndef CONFIG_KASAN
>  _GLOBAL(__memset16)
>  	rlwimi	r4,r4,16,0,15
>  	/* fall through */
> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>  EXPORT_SYMBOL(__memset16)
>  EXPORT_SYMBOL(__memset32)
>  EXPORT_SYMBOL(__memset64)
> +#endif
>  
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>  	neg	r0,r3
>  	rlwimi	r4,r4,8,16,23
>  	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>  10:	bflr	31
>  	stb	r4,0(r6)
>  	blr
> -EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>  
> -_GLOBAL_TOC(memmove)
> +_GLOBAL_TOC_KASAN(memmove)
>  	cmplw	0,r3,r4
>  	bgt	backwards_memcpy
>  	b	memcpy
> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>  	beq	2b
>  	mtctr	r7
>  	b	1b
> -EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 273ea67e60a1..862b515b8868 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -11,6 +11,7 @@
>  #include <asm/export.h>
>  #include <asm/asm-compat.h>
>  #include <asm/feature-fixups.h>
> +#include <asm/kasan.h>
>  
>  #ifndef SELFTEST_CASE
>  /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
> @@ -18,7 +19,7 @@
>  #endif
>  
>  	.align	7
> -_GLOBAL_TOC(memcpy)
> +_GLOBAL_TOC_KASAN(memcpy)
>  BEGIN_FTR_SECTION
>  #ifdef __LITTLE_ENDIAN__
>  	cmpdi	cr7,r5,0
> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>  4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>  	blr
>  #endif
> -EXPORT_SYMBOL(memcpy)
> +EXPORT_SYMBOL_KASAN(memcpy)
> -- 
> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Daniel Axtens]

Hi Christophe,
> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
> new file mode 100644
> index 000000000000..c3161b8fc017
> --- /dev/null
> +++ b/arch/powerpc/include/asm/kasan.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __ASM_KASAN_H
> +#define __ASM_KASAN_H
> +
> +#ifdef CONFIG_KASAN
> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)

I'm having some trouble with this. I get warnings like this:

WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.

It seems to be related to the export line, as if I swap the exports to
do fn before __##fn I get:

WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.

I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
This works - no warning:

EXPORT_SYMBOL(memset)
EXPORT_SYMBOL(__memset)

This throws a warning:

EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)

I notice in looking at the diff of preprocessed source we end up
invoking an asm macro that doesn't seem to have a full final argument, I
wonder if that's relevant...

-___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
+___EXPORT_SYMBOL __memset, __memset,
+___EXPORT_SYMBOL memset, memset,

I also notice that nowhere else in the source do people have multiple
EXPORT_SYMBOLs on the same line, and other arches seem to just
unconditionally export both symbols on multiple lines.

I have no idea how this works for you - maybe it's affected by something 32bit.

How would you feel about this approach instead? I'm not tied to any of
the names or anything.

diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
index e0637730a8e7..7b6a91b448dd 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -214,6 +214,9 @@ name: \
 
 #define DOTSYM(a)      a
 
+#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
+       .weak weakname ; .set weakname, strongname ;
+
 #else
 
 #define XGLUE(a,b) a##b
@@ -236,6 +239,10 @@ GLUE(.,name):
 
 #define DOTSYM(a)      GLUE(.,a)
 
+#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
+       .weak weakname ; .set weakname, strongname ; \
+       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
+
 #endif
 
 #else /* 32-bit */
@@ -251,6 +258,9 @@ GLUE(.,name):
 
 #define _GLOBAL_TOC(name) _GLOBAL(name)
 
+#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
+       .weak weakname ; .set weakname, strongname ;
+
 #endif
 
 /*
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
 EXPORT_SYMBOL(__memset64)
 #endif
 
-_GLOBAL_KASAN(memset)
+PROVIDE_WEAK_ALIAS(__memset,memset)
+_GLOBAL(__memset)
        neg     r0,r3
        rlwimi  r4,r4,8,16,23
        andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
@@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
 10:    bflr    31
        stb     r4,0(r6)
        blr
-EXPORT_SYMBOL_KASAN(memset)
+EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL(__memset)
 
-_GLOBAL_TOC_KASAN(memmove)
+PROVIDE_WEAK_ALIAS(__memmove,memove)
+_GLOBAL_TOC(__memmove)
        cmplw   0,r3,r4
        bgt     backwards_memcpy
        b       memcpy
@@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
        beq     2b
        mtctr   r7
        b       1b
-EXPORT_SYMBOL_KASAN(memmove)
+EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL(__memmove)
diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
index 862b515b8868..7c1b09556cad 100644
--- a/arch/powerpc/lib/memcpy_64.S
+++ b/arch/powerpc/lib/memcpy_64.S
@@ -19,7 +19,8 @@
 #endif
 
        .align  7
-_GLOBAL_TOC_KASAN(memcpy)
+PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
+_GLOBAL_TOC(__memcpy)
 BEGIN_FTR_SECTION
 #ifdef __LITTLE_ENDIAN__
        cmpdi   cr7,r5,0
@@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
 4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
        blr
 #endif
-EXPORT_SYMBOL_KASAN(memcpy)
+EXPORT_SYMBOL(__memcpy)
+EXPORT_SYMBOL(memcpy)


Regards,
Daniel


> +#else
> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
> +#endif
> +
> +#endif
> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
> index 1647de15a31e..9bf6dffb4090 100644
> --- a/arch/powerpc/include/asm/string.h
> +++ b/arch/powerpc/include/asm/string.h
> @@ -4,14 +4,17 @@
>  
>  #ifdef __KERNEL__
>  
> +#ifndef CONFIG_KASAN
>  #define __HAVE_ARCH_STRNCPY
>  #define __HAVE_ARCH_STRNCMP
> +#define __HAVE_ARCH_MEMCHR
> +#define __HAVE_ARCH_MEMCMP
> +#define __HAVE_ARCH_MEMSET16
> +#endif
> +
>  #define __HAVE_ARCH_MEMSET
>  #define __HAVE_ARCH_MEMCPY
>  #define __HAVE_ARCH_MEMMOVE
> -#define __HAVE_ARCH_MEMCMP
> -#define __HAVE_ARCH_MEMCHR
> -#define __HAVE_ARCH_MEMSET16
>  #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>  
>  extern char * strcpy(char *,const char *);
> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>  extern void * memchr(const void *,int,__kernel_size_t);
>  extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>  
> +void *__memset(void *s, int c, __kernel_size_t count);
> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
> +void *__memmove(void *to, const void *from, __kernel_size_t n);
> +
> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
> +/*
> + * For files that are not instrumented (e.g. mm/slub.c) we
> + * should use not instrumented version of mem* functions.
> + */
> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
> +#define memmove(dst, src, len) __memmove(dst, src, len)
> +#define memset(s, c, n) __memset(s, c, n)
> +
> +#ifndef __NO_FORTIFY
> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
> +#endif
> +
> +#endif
> +
>  #ifdef CONFIG_PPC64
> +#ifndef CONFIG_KASAN
>  #define __HAVE_ARCH_MEMSET32
>  #define __HAVE_ARCH_MEMSET64
>  
> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>  {
>  	return __memset64(p, v, n * 8);
>  }
> +#endif
>  #else
> +#ifndef CONFIG_KASAN
>  #define __HAVE_ARCH_STRLEN
> +#endif
>  
>  extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>  #endif
> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
> index 667df97d2595..181fd10008ef 100644
> --- a/arch/powerpc/kernel/prom_init_check.sh
> +++ b/arch/powerpc/kernel/prom_init_check.sh
> @@ -16,8 +16,16 @@
>  # If you really need to reference something from prom_init.o add
>  # it to the list below:
>  
> +grep "^CONFIG_KASAN=y$" .config >/dev/null
> +if [ $? -eq 0 ]
> +then
> +	MEM_FUNCS="__memcpy __memset"
> +else
> +	MEM_FUNCS="memcpy memset"
> +fi
> +
>  WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
> -_end enter_prom memcpy memset reloc_offset __secondary_hold
> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>  __secondary_hold_acknowledge __secondary_hold_spinloop __start
>  strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>  reloc_got2 kernstart_addr memstart_addr linux_banner _stext
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 79396e184bca..47a4de434c22 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>  CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>  CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>  
> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
> +obj-y += alloc.o code-patching.o feature-fixups.o
>  
> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
> +ifndef CONFIG_KASAN
> +obj-y	+=	string.o memcmp_$(BITS).o
> +obj-$(CONFIG_PPC32)	+= strlen_32.o
> +endif
> +
> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>  
>  obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>  
> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>  					   test_emulate_step_exec_instr.o
>  
>  obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
> -			   string_$(BITS).o memcmp_$(BITS).o
> +			   string_$(BITS).o
>  
>  obj-y			+= sstep.o ldstfp.o quad.o
>  obj64-y			+= quad.o
> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
> index ba66846fe973..fc4fa7246200 100644
> --- a/arch/powerpc/lib/copy_32.S
> +++ b/arch/powerpc/lib/copy_32.S
> @@ -14,6 +14,7 @@
>  #include <asm/ppc_asm.h>
>  #include <asm/export.h>
>  #include <asm/code-patching-asm.h>
> +#include <asm/kasan.h>
>  
>  #define COPY_16_BYTES		\
>  	lwz	r7,4(r4);	\
> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>  LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>  CACHELINE_MASK = (L1_CACHE_BYTES-1)
>  
> +#ifndef CONFIG_KASAN
>  _GLOBAL(memset16)
>  	rlwinm.	r0 ,r5, 31, 1, 31
>  	addi	r6, r3, -4
> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>  	sth	r4, 4(r6)
>  	blr
>  EXPORT_SYMBOL(memset16)
> +#endif
>  
>  /*
>   * Use dcbz on the complete cache lines in the destination
> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>   * We therefore skip the optimised bloc that uses dcbz. This jump is
>   * replaced by a nop once cache is active. This is done in machine_init()
>   */
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>  	cmplwi	0,r5,4
>  	blt	7f
>  
> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>  9:	stbu	r4,1(r6)
>  	bdnz	9b
>  	blr
> -EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>  
>  /*
>   * This version uses dcbz on the complete cache lines in the
> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>   * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>   * replaced by a nop once cache is active. This is done in machine_init()
>   */
> -_GLOBAL(memmove)
> +_GLOBAL_KASAN(memmove)
>  	cmplw	0,r3,r4
>  	bgt	backwards_memcpy
>  	/* fall through */
>  
> -_GLOBAL(memcpy)
> +_GLOBAL_KASAN(memcpy)
>  1:	b	generic_memcpy
>  	patch_site	1b, patch__memcpy_nocache
>  
> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>  	stbu	r0,1(r6)
>  	bdnz	40b
>  65:	blr
> -EXPORT_SYMBOL(memcpy)
> -EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL_KASAN(memmove)
>  
>  generic_memcpy:
>  	srwi.	r7,r5,3
> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
> index 3c3be02f33b7..7cd6cf6822a2 100644
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -12,7 +12,9 @@
>  #include <asm/errno.h>
>  #include <asm/ppc_asm.h>
>  #include <asm/export.h>
> +#include <asm/kasan.h>
>  
> +#ifndef CONFIG_KASAN
>  _GLOBAL(__memset16)
>  	rlwimi	r4,r4,16,0,15
>  	/* fall through */
> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>  EXPORT_SYMBOL(__memset16)
>  EXPORT_SYMBOL(__memset32)
>  EXPORT_SYMBOL(__memset64)
> +#endif
>  
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>  	neg	r0,r3
>  	rlwimi	r4,r4,8,16,23
>  	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>  10:	bflr	31
>  	stb	r4,0(r6)
>  	blr
> -EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>  
> -_GLOBAL_TOC(memmove)
> +_GLOBAL_TOC_KASAN(memmove)
>  	cmplw	0,r3,r4
>  	bgt	backwards_memcpy
>  	b	memcpy
> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>  	beq	2b
>  	mtctr	r7
>  	b	1b
> -EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 273ea67e60a1..862b515b8868 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -11,6 +11,7 @@
>  #include <asm/export.h>
>  #include <asm/asm-compat.h>
>  #include <asm/feature-fixups.h>
> +#include <asm/kasan.h>
>  
>  #ifndef SELFTEST_CASE
>  /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
> @@ -18,7 +19,7 @@
>  #endif
>  
>  	.align	7
> -_GLOBAL_TOC(memcpy)
> +_GLOBAL_TOC_KASAN(memcpy)
>  BEGIN_FTR_SECTION
>  #ifdef __LITTLE_ENDIAN__
>  	cmpdi	cr7,r5,0
> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>  4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>  	blr
>  #endif
> -EXPORT_SYMBOL(memcpy)
> +EXPORT_SYMBOL_KASAN(memcpy)
> -- 
> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Christophe Leroy]

Le 04/03/2019 à 06:26, Daniel Axtens a écrit :
> Hi Christophe,
>> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
>> new file mode 100644
>> index 000000000000..c3161b8fc017
>> --- /dev/null
>> +++ b/arch/powerpc/include/asm/kasan.h
>> @@ -0,0 +1,15 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +#ifndef __ASM_KASAN_H
>> +#define __ASM_KASAN_H
>> +
>> +#ifdef CONFIG_KASAN
>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
> 
> I'm having some trouble with this. I get warnings like this:

I don't have such problem, neither with ppc32 nor with ppc64e_defconfig.

What config are you using ?

Another (unrelated) question I have:
On the initial arm64 implementation (39d114ddc682 arm64: add KASAN 
support) they made KASAN implementation depend on SPARSEMEM_VMEMMAP 
(allthough they later removed that dependency with commit e17d8025f07e 
arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow)

So I'm wondering why on your side, KASAN depends on !SPARSEMEM_VMEMMAP

Thanks
Christophe

> 
> WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.
> 
> It seems to be related to the export line, as if I swap the exports to
> do fn before __##fn I get:
> 
> WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.
> 
> I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
> This works - no warning:
> 
> EXPORT_SYMBOL(memset)
> EXPORT_SYMBOL(__memset)
> 
> This throws a warning:
> 
> EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)
> 
> I notice in looking at the diff of preprocessed source we end up
> invoking an asm macro that doesn't seem to have a full final argument, I
> wonder if that's relevant...
> 
> -___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
> +___EXPORT_SYMBOL __memset, __memset,
> +___EXPORT_SYMBOL memset, memset,
> 
> I also notice that nowhere else in the source do people have multiple
> EXPORT_SYMBOLs on the same line, and other arches seem to just
> unconditionally export both symbols on multiple lines.
> 
> I have no idea how this works for you - maybe it's affected by something 32bit.
> 
> How would you feel about this approach instead? I'm not tied to any of
> the names or anything.
> 
> diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
> index e0637730a8e7..7b6a91b448dd 100644
> --- a/arch/powerpc/include/asm/ppc_asm.h
> +++ b/arch/powerpc/include/asm/ppc_asm.h
> @@ -214,6 +214,9 @@ name: \
>   
>   #define DOTSYM(a)      a
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #else
>   
>   #define XGLUE(a,b) a##b
> @@ -236,6 +239,10 @@ GLUE(.,name):
>   
>   #define DOTSYM(a)      GLUE(.,a)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ; \
> +       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
> +
>   #endif
>   
>   #else /* 32-bit */
> @@ -251,6 +258,9 @@ GLUE(.,name):
>   
>   #define _GLOBAL_TOC(name) _GLOBAL(name)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #endif
>   
>   /*
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
>   EXPORT_SYMBOL(__memset64)
>   #endif
>   
> -_GLOBAL_KASAN(memset)
> +PROVIDE_WEAK_ALIAS(__memset,memset)
> +_GLOBAL(__memset)
>          neg     r0,r3
>          rlwimi  r4,r4,8,16,23
>          andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
> @@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
>   10:    bflr    31
>          stb     r4,0(r6)
>          blr
> -EXPORT_SYMBOL_KASAN(memset)
> +EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL(__memset)
>   
> -_GLOBAL_TOC_KASAN(memmove)
> +PROVIDE_WEAK_ALIAS(__memmove,memove)
> +_GLOBAL_TOC(__memmove)
>          cmplw   0,r3,r4
>          bgt     backwards_memcpy
>          b       memcpy
> @@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
>          beq     2b
>          mtctr   r7
>          b       1b
> -EXPORT_SYMBOL_KASAN(memmove)
> +EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL(__memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 862b515b8868..7c1b09556cad 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -19,7 +19,8 @@
>   #endif
>   
>          .align  7
> -_GLOBAL_TOC_KASAN(memcpy)
> +PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
> +_GLOBAL_TOC(__memcpy)
>   BEGIN_FTR_SECTION
>   #ifdef __LITTLE_ENDIAN__
>          cmpdi   cr7,r5,0
> @@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>   4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
>          blr
>   #endif
> -EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL(__memcpy)
> +EXPORT_SYMBOL(memcpy)
> 
> 
> Regards,
> Daniel
> 
> 
>> +#else
>> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
>> +#endif
>> +
>> +#endif
>> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
>> index 1647de15a31e..9bf6dffb4090 100644
>> --- a/arch/powerpc/include/asm/string.h
>> +++ b/arch/powerpc/include/asm/string.h
>> @@ -4,14 +4,17 @@
>>   
>>   #ifdef __KERNEL__
>>   
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRNCPY
>>   #define __HAVE_ARCH_STRNCMP
>> +#define __HAVE_ARCH_MEMCHR
>> +#define __HAVE_ARCH_MEMCMP
>> +#define __HAVE_ARCH_MEMSET16
>> +#endif
>> +
>>   #define __HAVE_ARCH_MEMSET
>>   #define __HAVE_ARCH_MEMCPY
>>   #define __HAVE_ARCH_MEMMOVE
>> -#define __HAVE_ARCH_MEMCMP
>> -#define __HAVE_ARCH_MEMCHR
>> -#define __HAVE_ARCH_MEMSET16
>>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>>   
>>   extern char * strcpy(char *,const char *);
>> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>>   extern void * memchr(const void *,int,__kernel_size_t);
>>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>>   
>> +void *__memset(void *s, int c, __kernel_size_t count);
>> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
>> +void *__memmove(void *to, const void *from, __kernel_size_t n);
>> +
>> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
>> +/*
>> + * For files that are not instrumented (e.g. mm/slub.c) we
>> + * should use not instrumented version of mem* functions.
>> + */
>> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
>> +#define memmove(dst, src, len) __memmove(dst, src, len)
>> +#define memset(s, c, n) __memset(s, c, n)
>> +
>> +#ifndef __NO_FORTIFY
>> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
>> +#endif
>> +
>> +#endif
>> +
>>   #ifdef CONFIG_PPC64
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_MEMSET32
>>   #define __HAVE_ARCH_MEMSET64
>>   
>> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>>   {
>>   	return __memset64(p, v, n * 8);
>>   }
>> +#endif
>>   #else
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRLEN
>> +#endif
>>   
>>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>>   #endif
>> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
>> index 667df97d2595..181fd10008ef 100644
>> --- a/arch/powerpc/kernel/prom_init_check.sh
>> +++ b/arch/powerpc/kernel/prom_init_check.sh
>> @@ -16,8 +16,16 @@
>>   # If you really need to reference something from prom_init.o add
>>   # it to the list below:
>>   
>> +grep "^CONFIG_KASAN=y$" .config >/dev/null
>> +if [ $? -eq 0 ]
>> +then
>> +	MEM_FUNCS="__memcpy __memset"
>> +else
>> +	MEM_FUNCS="memcpy memset"
>> +fi
>> +
>>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
>> -_end enter_prom memcpy memset reloc_offset __secondary_hold
>> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>> index 79396e184bca..47a4de434c22 100644
>> --- a/arch/powerpc/lib/Makefile
>> +++ b/arch/powerpc/lib/Makefile
>> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>>   
>> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
>> +obj-y += alloc.o code-patching.o feature-fixups.o
>>   
>> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
>> +ifndef CONFIG_KASAN
>> +obj-y	+=	string.o memcmp_$(BITS).o
>> +obj-$(CONFIG_PPC32)	+= strlen_32.o
>> +endif
>> +
>> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>>   
>>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>>   
>> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>>   					   test_emulate_step_exec_instr.o
>>   
>>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
>> -			   string_$(BITS).o memcmp_$(BITS).o
>> +			   string_$(BITS).o
>>   
>>   obj-y			+= sstep.o ldstfp.o quad.o
>>   obj64-y			+= quad.o
>> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
>> index ba66846fe973..fc4fa7246200 100644
>> --- a/arch/powerpc/lib/copy_32.S
>> +++ b/arch/powerpc/lib/copy_32.S
>> @@ -14,6 +14,7 @@
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>>   #include <asm/code-patching-asm.h>
>> +#include <asm/kasan.h>
>>   
>>   #define COPY_16_BYTES		\
>>   	lwz	r7,4(r4);	\
>> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(memset16)
>>   	rlwinm.	r0 ,r5, 31, 1, 31
>>   	addi	r6, r3, -4
>> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>>   	sth	r4, 4(r6)
>>   	blr
>>   EXPORT_SYMBOL(memset16)
>> +#endif
>>   
>>   /*
>>    * Use dcbz on the complete cache lines in the destination
>> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	cmplwi	0,r5,4
>>   	blt	7f
>>   
>> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>>   9:	stbu	r4,1(r6)
>>   	bdnz	9b
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>>   /*
>>    * This version uses dcbz on the complete cache lines in the
>> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>>    * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memmove)
>> +_GLOBAL_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	/* fall through */
>>   
>> -_GLOBAL(memcpy)
>> +_GLOBAL_KASAN(memcpy)
>>   1:	b	generic_memcpy
>>   	patch_site	1b, patch__memcpy_nocache
>>   
>> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>>   	stbu	r0,1(r6)
>>   	bdnz	40b
>>   65:	blr
>> -EXPORT_SYMBOL(memcpy)
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> +EXPORT_SYMBOL_KASAN(memmove)
>>   
>>   generic_memcpy:
>>   	srwi.	r7,r5,3
>> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
>> index 3c3be02f33b7..7cd6cf6822a2 100644
>> --- a/arch/powerpc/lib/mem_64.S
>> +++ b/arch/powerpc/lib/mem_64.S
>> @@ -12,7 +12,9 @@
>>   #include <asm/errno.h>
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>> +#include <asm/kasan.h>
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(__memset16)
>>   	rlwimi	r4,r4,16,0,15
>>   	/* fall through */
>> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>>   EXPORT_SYMBOL(__memset16)
>>   EXPORT_SYMBOL(__memset32)
>>   EXPORT_SYMBOL(__memset64)
>> +#endif
>>   
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	neg	r0,r3
>>   	rlwimi	r4,r4,8,16,23
>>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
>> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>>   10:	bflr	31
>>   	stb	r4,0(r6)
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>> -_GLOBAL_TOC(memmove)
>> +_GLOBAL_TOC_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	b	memcpy
>> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>>   	beq	2b
>>   	mtctr	r7
>>   	b	1b
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memmove)
>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>> index 273ea67e60a1..862b515b8868 100644
>> --- a/arch/powerpc/lib/memcpy_64.S
>> +++ b/arch/powerpc/lib/memcpy_64.S
>> @@ -11,6 +11,7 @@
>>   #include <asm/export.h>
>>   #include <asm/asm-compat.h>
>>   #include <asm/feature-fixups.h>
>> +#include <asm/kasan.h>
>>   
>>   #ifndef SELFTEST_CASE
>>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
>> @@ -18,7 +19,7 @@
>>   #endif
>>   
>>   	.align	7
>> -_GLOBAL_TOC(memcpy)
>> +_GLOBAL_TOC_KASAN(memcpy)
>>   BEGIN_FTR_SECTION
>>   #ifdef __LITTLE_ENDIAN__
>>   	cmpdi	cr7,r5,0
>> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>   4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>>   	blr
>>   #endif
>> -EXPORT_SYMBOL(memcpy)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> -- 
>> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Christophe Leroy]

Le 04/03/2019 à 06:26, Daniel Axtens a écrit :
> Hi Christophe,
>> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
>> new file mode 100644
>> index 000000000000..c3161b8fc017
>> --- /dev/null
>> +++ b/arch/powerpc/include/asm/kasan.h
>> @@ -0,0 +1,15 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +#ifndef __ASM_KASAN_H
>> +#define __ASM_KASAN_H
>> +
>> +#ifdef CONFIG_KASAN
>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
> 
> I'm having some trouble with this. I get warnings like this:

I don't have such problem, neither with ppc32 nor with ppc64e_defconfig.

What config are you using ?

Another (unrelated) question I have:
On the initial arm64 implementation (39d114ddc682 arm64: add KASAN 
support) they made KASAN implementation depend on SPARSEMEM_VMEMMAP 
(allthough they later removed that dependency with commit e17d8025f07e 
arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow)

So I'm wondering why on your side, KASAN depends on !SPARSEMEM_VMEMMAP

Thanks
Christophe

> 
> WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.
> 
> It seems to be related to the export line, as if I swap the exports to
> do fn before __##fn I get:
> 
> WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.
> 
> I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
> This works - no warning:
> 
> EXPORT_SYMBOL(memset)
> EXPORT_SYMBOL(__memset)
> 
> This throws a warning:
> 
> EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)
> 
> I notice in looking at the diff of preprocessed source we end up
> invoking an asm macro that doesn't seem to have a full final argument, I
> wonder if that's relevant...
> 
> -___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
> +___EXPORT_SYMBOL __memset, __memset,
> +___EXPORT_SYMBOL memset, memset,
> 
> I also notice that nowhere else in the source do people have multiple
> EXPORT_SYMBOLs on the same line, and other arches seem to just
> unconditionally export both symbols on multiple lines.
> 
> I have no idea how this works for you - maybe it's affected by something 32bit.
> 
> How would you feel about this approach instead? I'm not tied to any of
> the names or anything.
> 
> diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
> index e0637730a8e7..7b6a91b448dd 100644
> --- a/arch/powerpc/include/asm/ppc_asm.h
> +++ b/arch/powerpc/include/asm/ppc_asm.h
> @@ -214,6 +214,9 @@ name: \
>   
>   #define DOTSYM(a)      a
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #else
>   
>   #define XGLUE(a,b) a##b
> @@ -236,6 +239,10 @@ GLUE(.,name):
>   
>   #define DOTSYM(a)      GLUE(.,a)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ; \
> +       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
> +
>   #endif
>   
>   #else /* 32-bit */
> @@ -251,6 +258,9 @@ GLUE(.,name):
>   
>   #define _GLOBAL_TOC(name) _GLOBAL(name)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #endif
>   
>   /*
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
>   EXPORT_SYMBOL(__memset64)
>   #endif
>   
> -_GLOBAL_KASAN(memset)
> +PROVIDE_WEAK_ALIAS(__memset,memset)
> +_GLOBAL(__memset)
>          neg     r0,r3
>          rlwimi  r4,r4,8,16,23
>          andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
> @@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
>   10:    bflr    31
>          stb     r4,0(r6)
>          blr
> -EXPORT_SYMBOL_KASAN(memset)
> +EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL(__memset)
>   
> -_GLOBAL_TOC_KASAN(memmove)
> +PROVIDE_WEAK_ALIAS(__memmove,memove)
> +_GLOBAL_TOC(__memmove)
>          cmplw   0,r3,r4
>          bgt     backwards_memcpy
>          b       memcpy
> @@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
>          beq     2b
>          mtctr   r7
>          b       1b
> -EXPORT_SYMBOL_KASAN(memmove)
> +EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL(__memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 862b515b8868..7c1b09556cad 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -19,7 +19,8 @@
>   #endif
>   
>          .align  7
> -_GLOBAL_TOC_KASAN(memcpy)
> +PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
> +_GLOBAL_TOC(__memcpy)
>   BEGIN_FTR_SECTION
>   #ifdef __LITTLE_ENDIAN__
>          cmpdi   cr7,r5,0
> @@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>   4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
>          blr
>   #endif
> -EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL(__memcpy)
> +EXPORT_SYMBOL(memcpy)
> 
> 
> Regards,
> Daniel
> 
> 
>> +#else
>> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
>> +#endif
>> +
>> +#endif
>> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
>> index 1647de15a31e..9bf6dffb4090 100644
>> --- a/arch/powerpc/include/asm/string.h
>> +++ b/arch/powerpc/include/asm/string.h
>> @@ -4,14 +4,17 @@
>>   
>>   #ifdef __KERNEL__
>>   
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRNCPY
>>   #define __HAVE_ARCH_STRNCMP
>> +#define __HAVE_ARCH_MEMCHR
>> +#define __HAVE_ARCH_MEMCMP
>> +#define __HAVE_ARCH_MEMSET16
>> +#endif
>> +
>>   #define __HAVE_ARCH_MEMSET
>>   #define __HAVE_ARCH_MEMCPY
>>   #define __HAVE_ARCH_MEMMOVE
>> -#define __HAVE_ARCH_MEMCMP
>> -#define __HAVE_ARCH_MEMCHR
>> -#define __HAVE_ARCH_MEMSET16
>>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>>   
>>   extern char * strcpy(char *,const char *);
>> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>>   extern void * memchr(const void *,int,__kernel_size_t);
>>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>>   
>> +void *__memset(void *s, int c, __kernel_size_t count);
>> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
>> +void *__memmove(void *to, const void *from, __kernel_size_t n);
>> +
>> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
>> +/*
>> + * For files that are not instrumented (e.g. mm/slub.c) we
>> + * should use not instrumented version of mem* functions.
>> + */
>> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
>> +#define memmove(dst, src, len) __memmove(dst, src, len)
>> +#define memset(s, c, n) __memset(s, c, n)
>> +
>> +#ifndef __NO_FORTIFY
>> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
>> +#endif
>> +
>> +#endif
>> +
>>   #ifdef CONFIG_PPC64
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_MEMSET32
>>   #define __HAVE_ARCH_MEMSET64
>>   
>> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>>   {
>>   	return __memset64(p, v, n * 8);
>>   }
>> +#endif
>>   #else
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRLEN
>> +#endif
>>   
>>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>>   #endif
>> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
>> index 667df97d2595..181fd10008ef 100644
>> --- a/arch/powerpc/kernel/prom_init_check.sh
>> +++ b/arch/powerpc/kernel/prom_init_check.sh
>> @@ -16,8 +16,16 @@
>>   # If you really need to reference something from prom_init.o add
>>   # it to the list below:
>>   
>> +grep "^CONFIG_KASAN=y$" .config >/dev/null
>> +if [ $? -eq 0 ]
>> +then
>> +	MEM_FUNCS="__memcpy __memset"
>> +else
>> +	MEM_FUNCS="memcpy memset"
>> +fi
>> +
>>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
>> -_end enter_prom memcpy memset reloc_offset __secondary_hold
>> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>> index 79396e184bca..47a4de434c22 100644
>> --- a/arch/powerpc/lib/Makefile
>> +++ b/arch/powerpc/lib/Makefile
>> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>>   
>> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
>> +obj-y += alloc.o code-patching.o feature-fixups.o
>>   
>> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
>> +ifndef CONFIG_KASAN
>> +obj-y	+=	string.o memcmp_$(BITS).o
>> +obj-$(CONFIG_PPC32)	+= strlen_32.o
>> +endif
>> +
>> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>>   
>>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>>   
>> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>>   					   test_emulate_step_exec_instr.o
>>   
>>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
>> -			   string_$(BITS).o memcmp_$(BITS).o
>> +			   string_$(BITS).o
>>   
>>   obj-y			+= sstep.o ldstfp.o quad.o
>>   obj64-y			+= quad.o
>> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
>> index ba66846fe973..fc4fa7246200 100644
>> --- a/arch/powerpc/lib/copy_32.S
>> +++ b/arch/powerpc/lib/copy_32.S
>> @@ -14,6 +14,7 @@
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>>   #include <asm/code-patching-asm.h>
>> +#include <asm/kasan.h>
>>   
>>   #define COPY_16_BYTES		\
>>   	lwz	r7,4(r4);	\
>> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(memset16)
>>   	rlwinm.	r0 ,r5, 31, 1, 31
>>   	addi	r6, r3, -4
>> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>>   	sth	r4, 4(r6)
>>   	blr
>>   EXPORT_SYMBOL(memset16)
>> +#endif
>>   
>>   /*
>>    * Use dcbz on the complete cache lines in the destination
>> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	cmplwi	0,r5,4
>>   	blt	7f
>>   
>> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>>   9:	stbu	r4,1(r6)
>>   	bdnz	9b
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>>   /*
>>    * This version uses dcbz on the complete cache lines in the
>> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>>    * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memmove)
>> +_GLOBAL_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	/* fall through */
>>   
>> -_GLOBAL(memcpy)
>> +_GLOBAL_KASAN(memcpy)
>>   1:	b	generic_memcpy
>>   	patch_site	1b, patch__memcpy_nocache
>>   
>> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>>   	stbu	r0,1(r6)
>>   	bdnz	40b
>>   65:	blr
>> -EXPORT_SYMBOL(memcpy)
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> +EXPORT_SYMBOL_KASAN(memmove)
>>   
>>   generic_memcpy:
>>   	srwi.	r7,r5,3
>> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
>> index 3c3be02f33b7..7cd6cf6822a2 100644
>> --- a/arch/powerpc/lib/mem_64.S
>> +++ b/arch/powerpc/lib/mem_64.S
>> @@ -12,7 +12,9 @@
>>   #include <asm/errno.h>
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>> +#include <asm/kasan.h>
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(__memset16)
>>   	rlwimi	r4,r4,16,0,15
>>   	/* fall through */
>> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>>   EXPORT_SYMBOL(__memset16)
>>   EXPORT_SYMBOL(__memset32)
>>   EXPORT_SYMBOL(__memset64)
>> +#endif
>>   
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	neg	r0,r3
>>   	rlwimi	r4,r4,8,16,23
>>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
>> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>>   10:	bflr	31
>>   	stb	r4,0(r6)
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>> -_GLOBAL_TOC(memmove)
>> +_GLOBAL_TOC_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	b	memcpy
>> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>>   	beq	2b
>>   	mtctr	r7
>>   	b	1b
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memmove)
>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>> index 273ea67e60a1..862b515b8868 100644
>> --- a/arch/powerpc/lib/memcpy_64.S
>> +++ b/arch/powerpc/lib/memcpy_64.S
>> @@ -11,6 +11,7 @@
>>   #include <asm/export.h>
>>   #include <asm/asm-compat.h>
>>   #include <asm/feature-fixups.h>
>> +#include <asm/kasan.h>
>>   
>>   #ifndef SELFTEST_CASE
>>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
>> @@ -18,7 +19,7 @@
>>   #endif
>>   
>>   	.align	7
>> -_GLOBAL_TOC(memcpy)
>> +_GLOBAL_TOC_KASAN(memcpy)
>>   BEGIN_FTR_SECTION
>>   #ifdef __LITTLE_ENDIAN__
>>   	cmpdi	cr7,r5,0
>> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>   4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>>   	blr
>>   #endif
>> -EXPORT_SYMBOL(memcpy)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> -- 
>> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Christophe Leroy]

Hi Daniel,

On 03/04/2019 05:26 AM, Daniel Axtens wrote:
> Hi Christophe,
>> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
>> new file mode 100644
>> index 000000000000..c3161b8fc017
>> --- /dev/null
>> +++ b/arch/powerpc/include/asm/kasan.h
>> @@ -0,0 +1,15 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +#ifndef __ASM_KASAN_H
>> +#define __ASM_KASAN_H
>> +
>> +#ifdef CONFIG_KASAN
>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
> 
> I'm having some trouble with this. I get warnings like this:
> 
> WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.

I don't have this problem, neither with my PPC32 defconfigs nor with 
ppc64e_defconfig - SPARSEMEM_VMEMMAP + KASAN
Using GCC 8.1

I've been looking into it in more details and can't understand the need 
for a weak symbol. A weak symbol is to allow it's optional replacement 
by other code. But here KASAN replaces it inconditionally, so I see no 
point for a weak symbol here.

Regarding the export of the functions, I believe that when the functions 
are defined in KASAN, they should be exported by KASAN and not by the 
arch. But such a change is out of scope for now. So lets have a double 
export for now, one day we will drop it.

Regarding export of __memcpy() etc..., there is at least the LKDTM 
module which inhibits KASAN, so it really needs to be exported.

What about the patch below ?

Christophe

diff --git a/arch/powerpc/include/asm/kasan.h 
b/arch/powerpc/include/asm/kasan.h
new file mode 100644
index 000000000000..2c179a39d4ba
--- /dev/null
+++ b/arch/powerpc/include/asm/kasan.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_KASAN_H
+#define __ASM_KASAN_H
+
+#ifdef CONFIG_KASAN
+#define _GLOBAL_KASAN(fn)	_GLOBAL(__##fn)
+#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(__##fn)
+#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn)
+#else
+#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
+#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
+#define EXPORT_SYMBOL_KASAN(fn)
+#endif
+
+#endif
diff --git a/arch/powerpc/include/asm/string.h 
b/arch/powerpc/include/asm/string.h
index 1647de15a31e..9bf6dffb4090 100644
--- a/arch/powerpc/include/asm/string.h
+++ b/arch/powerpc/include/asm/string.h
@@ -4,14 +4,17 @@

  #ifdef __KERNEL__

+#ifndef CONFIG_KASAN
  #define __HAVE_ARCH_STRNCPY
  #define __HAVE_ARCH_STRNCMP
+#define __HAVE_ARCH_MEMCHR
+#define __HAVE_ARCH_MEMCMP
+#define __HAVE_ARCH_MEMSET16
+#endif
+
  #define __HAVE_ARCH_MEMSET
  #define __HAVE_ARCH_MEMCPY
  #define __HAVE_ARCH_MEMMOVE
-#define __HAVE_ARCH_MEMCMP
-#define __HAVE_ARCH_MEMCHR
-#define __HAVE_ARCH_MEMSET16
  #define __HAVE_ARCH_MEMCPY_FLUSHCACHE

  extern char * strcpy(char *,const char *);
@@ -27,7 +30,27 @@ extern int memcmp(const void *,const void 
*,__kernel_size_t);
  extern void * memchr(const void *,int,__kernel_size_t);
  extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);

+void *__memset(void *s, int c, __kernel_size_t count);
+void *__memcpy(void *to, const void *from, __kernel_size_t n);
+void *__memmove(void *to, const void *from, __kernel_size_t n);
+
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+/*
+ * For files that are not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+
+#ifndef __NO_FORTIFY
+#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
+#endif
+
+#endif
+
  #ifdef CONFIG_PPC64
+#ifndef CONFIG_KASAN
  #define __HAVE_ARCH_MEMSET32
  #define __HAVE_ARCH_MEMSET64

@@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, 
__kernel_size_t n)
  {
  	return __memset64(p, v, n * 8);
  }
+#endif
  #else
+#ifndef CONFIG_KASAN
  #define __HAVE_ARCH_STRLEN
+#endif

  extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
  #endif
diff --git a/arch/powerpc/kernel/prom_init_check.sh 
b/arch/powerpc/kernel/prom_init_check.sh
index 667df97d2595..181fd10008ef 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -16,8 +16,16 @@
  # If you really need to reference something from prom_init.o add
  # it to the list below:

+grep "^CONFIG_KASAN=y$" .config >/dev/null
+if [ $? -eq 0 ]
+then
+	MEM_FUNCS="__memcpy __memset"
+else
+	MEM_FUNCS="memcpy memset"
+fi
+
  WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
-_end enter_prom memcpy memset reloc_offset __secondary_hold
+_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
  __secondary_hold_acknowledge __secondary_hold_spinloop __start
  strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
  reloc_got2 kernstart_addr memstart_addr linux_banner _stext
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 79396e184bca..47a4de434c22 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
  CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
  CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)

-obj-y += string.o alloc.o code-patching.o feature-fixups.o
+obj-y += alloc.o code-patching.o feature-fixups.o

-obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
+ifndef CONFIG_KASAN
+obj-y	+=	string.o memcmp_$(BITS).o
+obj-$(CONFIG_PPC32)	+= strlen_32.o
+endif
+
+obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o

  obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o

@@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= 
test_emulate_step.o \
  					   test_emulate_step_exec_instr.o

  obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
-			   string_$(BITS).o memcmp_$(BITS).o
+			   string_$(BITS).o

  obj-y			+= sstep.o ldstfp.o quad.o
  obj64-y			+= quad.o
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
index ba66846fe973..d5642481fb98 100644
--- a/arch/powerpc/lib/copy_32.S
+++ b/arch/powerpc/lib/copy_32.S
@@ -14,6 +14,7 @@
  #include <asm/ppc_asm.h>
  #include <asm/export.h>
  #include <asm/code-patching-asm.h>
+#include <asm/kasan.h>

  #define COPY_16_BYTES		\
  	lwz	r7,4(r4);	\
@@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
  LG_CACHELINE_BYTES = L1_CACHE_SHIFT
  CACHELINE_MASK = (L1_CACHE_BYTES-1)

+#ifndef CONFIG_KASAN
  _GLOBAL(memset16)
  	rlwinm.	r0 ,r5, 31, 1, 31
  	addi	r6, r3, -4
@@ -81,6 +83,7 @@ _GLOBAL(memset16)
  	sth	r4, 4(r6)
  	blr
  EXPORT_SYMBOL(memset16)
+#endif

  /*
   * Use dcbz on the complete cache lines in the destination
@@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
   * We therefore skip the optimised bloc that uses dcbz. This jump is
   * replaced by a nop once cache is active. This is done in machine_init()
   */
-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
  	cmplwi	0,r5,4
  	blt	7f

@@ -151,6 +154,7 @@ _GLOBAL(memset)
  	bdnz	9b
  	blr
  EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)

  /*
   * This version uses dcbz on the complete cache lines in the
@@ -163,12 +167,12 @@ EXPORT_SYMBOL(memset)
   * We therefore jump to generic_memcpy which doesn't use dcbz. This 
jump is
   * replaced by a nop once cache is active. This is done in machine_init()
   */
-_GLOBAL(memmove)
+_GLOBAL_KASAN(memmove)
  	cmplw	0,r3,r4
  	bgt	backwards_memcpy
  	/* fall through */

-_GLOBAL(memcpy)
+_GLOBAL_KASAN(memcpy)
  1:	b	generic_memcpy
  	patch_site	1b, patch__memcpy_nocache

@@ -244,6 +248,8 @@ _GLOBAL(memcpy)
  65:	blr
  EXPORT_SYMBOL(memcpy)
  EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memcpy)
+EXPORT_SYMBOL_KASAN(memmove)

  generic_memcpy:
  	srwi.	r7,r5,3
diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
index 3c3be02f33b7..7f6bd031c306 100644
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -12,7 +12,9 @@
  #include <asm/errno.h>
  #include <asm/ppc_asm.h>
  #include <asm/export.h>
+#include <asm/kasan.h>

+#ifndef CONFIG_KASAN
  _GLOBAL(__memset16)
  	rlwimi	r4,r4,16,0,15
  	/* fall through */
@@ -29,8 +31,9 @@ _GLOBAL(__memset64)
  EXPORT_SYMBOL(__memset16)
  EXPORT_SYMBOL(__memset32)
  EXPORT_SYMBOL(__memset64)
+#endif

-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
  	neg	r0,r3
  	rlwimi	r4,r4,8,16,23
  	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
@@ -96,8 +99,9 @@ _GLOBAL(memset)
  	stb	r4,0(r6)
  	blr
  EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)

-_GLOBAL_TOC(memmove)
+_GLOBAL_TOC_KASAN(memmove)
  	cmplw	0,r3,r4
  	bgt	backwards_memcpy
  	b	memcpy
@@ -139,3 +143,4 @@ _GLOBAL(backwards_memcpy)
  	mtctr	r7
  	b	1b
  EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memmove)
diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
index 273ea67e60a1..25c3772c1dfb 100644
--- a/arch/powerpc/lib/memcpy_64.S
+++ b/arch/powerpc/lib/memcpy_64.S
@@ -11,6 +11,7 @@
  #include <asm/export.h>
  #include <asm/asm-compat.h>
  #include <asm/feature-fixups.h>
+#include <asm/kasan.h>

  #ifndef SELFTEST_CASE
  /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
@@ -18,7 +19,7 @@
  #endif

  	.align	7
-_GLOBAL_TOC(memcpy)
+_GLOBAL_TOC_KASAN(memcpy)
  BEGIN_FTR_SECTION
  #ifdef __LITTLE_ENDIAN__
  	cmpdi	cr7,r5,0
@@ -230,3 +231,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
  	blr
  #endif
  EXPORT_SYMBOL(memcpy)
+EXPORT_SYMBOL_KASAN(memcpy)


> 
> It seems to be related to the export line, as if I swap the exports to
> do fn before __##fn I get:
> 
> WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.
> 
> I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
> This works - no warning:
> 
> EXPORT_SYMBOL(memset)
> EXPORT_SYMBOL(__memset)
> 
> This throws a warning:
> 
> EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)
> 
> I notice in looking at the diff of preprocessed source we end up
> invoking an asm macro that doesn't seem to have a full final argument, I
> wonder if that's relevant...
> 
> -___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
> +___EXPORT_SYMBOL __memset, __memset,
> +___EXPORT_SYMBOL memset, memset,
> 
> I also notice that nowhere else in the source do people have multiple
> EXPORT_SYMBOLs on the same line, and other arches seem to just
> unconditionally export both symbols on multiple lines.
> 
> I have no idea how this works for you - maybe it's affected by something 32bit.
> 
> How would you feel about this approach instead? I'm not tied to any of
> the names or anything.
> 
> diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
> index e0637730a8e7..7b6a91b448dd 100644
> --- a/arch/powerpc/include/asm/ppc_asm.h
> +++ b/arch/powerpc/include/asm/ppc_asm.h
> @@ -214,6 +214,9 @@ name: \
>   
>   #define DOTSYM(a)      a
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #else
>   
>   #define XGLUE(a,b) a##b
> @@ -236,6 +239,10 @@ GLUE(.,name):
>   
>   #define DOTSYM(a)      GLUE(.,a)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ; \
> +       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
> +
>   #endif
>   
>   #else /* 32-bit */
> @@ -251,6 +258,9 @@ GLUE(.,name):
>   
>   #define _GLOBAL_TOC(name) _GLOBAL(name)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #endif
>   
>   /*
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
>   EXPORT_SYMBOL(__memset64)
>   #endif
>   
> -_GLOBAL_KASAN(memset)
> +PROVIDE_WEAK_ALIAS(__memset,memset)
> +_GLOBAL(__memset)
>          neg     r0,r3
>          rlwimi  r4,r4,8,16,23
>          andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
> @@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
>   10:    bflr    31
>          stb     r4,0(r6)
>          blr
> -EXPORT_SYMBOL_KASAN(memset)
> +EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL(__memset)
>   
> -_GLOBAL_TOC_KASAN(memmove)
> +PROVIDE_WEAK_ALIAS(__memmove,memove)
> +_GLOBAL_TOC(__memmove)
>          cmplw   0,r3,r4
>          bgt     backwards_memcpy
>          b       memcpy
> @@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
>          beq     2b
>          mtctr   r7
>          b       1b
> -EXPORT_SYMBOL_KASAN(memmove)
> +EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL(__memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 862b515b8868..7c1b09556cad 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -19,7 +19,8 @@
>   #endif
>   
>          .align  7
> -_GLOBAL_TOC_KASAN(memcpy)
> +PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
> +_GLOBAL_TOC(__memcpy)
>   BEGIN_FTR_SECTION
>   #ifdef __LITTLE_ENDIAN__
>          cmpdi   cr7,r5,0
> @@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>   4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
>          blr
>   #endif
> -EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL(__memcpy)
> +EXPORT_SYMBOL(memcpy)
> 
> 
> Regards,
> Daniel
> 
> 
>> +#else
>> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
>> +#endif
>> +
>> +#endif
>> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
>> index 1647de15a31e..9bf6dffb4090 100644
>> --- a/arch/powerpc/include/asm/string.h
>> +++ b/arch/powerpc/include/asm/string.h
>> @@ -4,14 +4,17 @@
>>   
>>   #ifdef __KERNEL__
>>   
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRNCPY
>>   #define __HAVE_ARCH_STRNCMP
>> +#define __HAVE_ARCH_MEMCHR
>> +#define __HAVE_ARCH_MEMCMP
>> +#define __HAVE_ARCH_MEMSET16
>> +#endif
>> +
>>   #define __HAVE_ARCH_MEMSET
>>   #define __HAVE_ARCH_MEMCPY
>>   #define __HAVE_ARCH_MEMMOVE
>> -#define __HAVE_ARCH_MEMCMP
>> -#define __HAVE_ARCH_MEMCHR
>> -#define __HAVE_ARCH_MEMSET16
>>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>>   
>>   extern char * strcpy(char *,const char *);
>> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>>   extern void * memchr(const void *,int,__kernel_size_t);
>>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>>   
>> +void *__memset(void *s, int c, __kernel_size_t count);
>> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
>> +void *__memmove(void *to, const void *from, __kernel_size_t n);
>> +
>> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
>> +/*
>> + * For files that are not instrumented (e.g. mm/slub.c) we
>> + * should use not instrumented version of mem* functions.
>> + */
>> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
>> +#define memmove(dst, src, len) __memmove(dst, src, len)
>> +#define memset(s, c, n) __memset(s, c, n)
>> +
>> +#ifndef __NO_FORTIFY
>> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
>> +#endif
>> +
>> +#endif
>> +
>>   #ifdef CONFIG_PPC64
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_MEMSET32
>>   #define __HAVE_ARCH_MEMSET64
>>   
>> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>>   {
>>   	return __memset64(p, v, n * 8);
>>   }
>> +#endif
>>   #else
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRLEN
>> +#endif
>>   
>>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>>   #endif
>> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
>> index 667df97d2595..181fd10008ef 100644
>> --- a/arch/powerpc/kernel/prom_init_check.sh
>> +++ b/arch/powerpc/kernel/prom_init_check.sh
>> @@ -16,8 +16,16 @@
>>   # If you really need to reference something from prom_init.o add
>>   # it to the list below:
>>   
>> +grep "^CONFIG_KASAN=y$" .config >/dev/null
>> +if [ $? -eq 0 ]
>> +then
>> +	MEM_FUNCS="__memcpy __memset"
>> +else
>> +	MEM_FUNCS="memcpy memset"
>> +fi
>> +
>>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
>> -_end enter_prom memcpy memset reloc_offset __secondary_hold
>> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>> index 79396e184bca..47a4de434c22 100644
>> --- a/arch/powerpc/lib/Makefile
>> +++ b/arch/powerpc/lib/Makefile
>> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>>   
>> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
>> +obj-y += alloc.o code-patching.o feature-fixups.o
>>   
>> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
>> +ifndef CONFIG_KASAN
>> +obj-y	+=	string.o memcmp_$(BITS).o
>> +obj-$(CONFIG_PPC32)	+= strlen_32.o
>> +endif
>> +
>> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>>   
>>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>>   
>> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>>   					   test_emulate_step_exec_instr.o
>>   
>>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
>> -			   string_$(BITS).o memcmp_$(BITS).o
>> +			   string_$(BITS).o
>>   
>>   obj-y			+= sstep.o ldstfp.o quad.o
>>   obj64-y			+= quad.o
>> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
>> index ba66846fe973..fc4fa7246200 100644
>> --- a/arch/powerpc/lib/copy_32.S
>> +++ b/arch/powerpc/lib/copy_32.S
>> @@ -14,6 +14,7 @@
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>>   #include <asm/code-patching-asm.h>
>> +#include <asm/kasan.h>
>>   
>>   #define COPY_16_BYTES		\
>>   	lwz	r7,4(r4);	\
>> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(memset16)
>>   	rlwinm.	r0 ,r5, 31, 1, 31
>>   	addi	r6, r3, -4
>> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>>   	sth	r4, 4(r6)
>>   	blr
>>   EXPORT_SYMBOL(memset16)
>> +#endif
>>   
>>   /*
>>    * Use dcbz on the complete cache lines in the destination
>> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	cmplwi	0,r5,4
>>   	blt	7f
>>   
>> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>>   9:	stbu	r4,1(r6)
>>   	bdnz	9b
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>>   /*
>>    * This version uses dcbz on the complete cache lines in the
>> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>>    * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memmove)
>> +_GLOBAL_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	/* fall through */
>>   
>> -_GLOBAL(memcpy)
>> +_GLOBAL_KASAN(memcpy)
>>   1:	b	generic_memcpy
>>   	patch_site	1b, patch__memcpy_nocache
>>   
>> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>>   	stbu	r0,1(r6)
>>   	bdnz	40b
>>   65:	blr
>> -EXPORT_SYMBOL(memcpy)
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> +EXPORT_SYMBOL_KASAN(memmove)
>>   
>>   generic_memcpy:
>>   	srwi.	r7,r5,3
>> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
>> index 3c3be02f33b7..7cd6cf6822a2 100644
>> --- a/arch/powerpc/lib/mem_64.S
>> +++ b/arch/powerpc/lib/mem_64.S
>> @@ -12,7 +12,9 @@
>>   #include <asm/errno.h>
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>> +#include <asm/kasan.h>
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(__memset16)
>>   	rlwimi	r4,r4,16,0,15
>>   	/* fall through */
>> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>>   EXPORT_SYMBOL(__memset16)
>>   EXPORT_SYMBOL(__memset32)
>>   EXPORT_SYMBOL(__memset64)
>> +#endif
>>   
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	neg	r0,r3
>>   	rlwimi	r4,r4,8,16,23
>>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
>> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>>   10:	bflr	31
>>   	stb	r4,0(r6)
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>> -_GLOBAL_TOC(memmove)
>> +_GLOBAL_TOC_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	b	memcpy
>> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>>   	beq	2b
>>   	mtctr	r7
>>   	b	1b
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memmove)
>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>> index 273ea67e60a1..862b515b8868 100644
>> --- a/arch/powerpc/lib/memcpy_64.S
>> +++ b/arch/powerpc/lib/memcpy_64.S
>> @@ -11,6 +11,7 @@
>>   #include <asm/export.h>
>>   #include <asm/asm-compat.h>
>>   #include <asm/feature-fixups.h>
>> +#include <asm/kasan.h>
>>   
>>   #ifndef SELFTEST_CASE
>>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
>> @@ -18,7 +19,7 @@
>>   #endif
>>   
>>   	.align	7
>> -_GLOBAL_TOC(memcpy)
>> +_GLOBAL_TOC_KASAN(memcpy)
>>   BEGIN_FTR_SECTION
>>   #ifdef __LITTLE_ENDIAN__
>>   	cmpdi	cr7,r5,0
>> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>   4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>>   	blr
>>   #endif
>> -EXPORT_SYMBOL(memcpy)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> -- 
>> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Christophe Leroy]

Hi Daniel,

On 03/04/2019 05:26 AM, Daniel Axtens wrote:
> Hi Christophe,
>> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
>> new file mode 100644
>> index 000000000000..c3161b8fc017
>> --- /dev/null
>> +++ b/arch/powerpc/include/asm/kasan.h
>> @@ -0,0 +1,15 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +#ifndef __ASM_KASAN_H
>> +#define __ASM_KASAN_H
>> +
>> +#ifdef CONFIG_KASAN
>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
> 
> I'm having some trouble with this. I get warnings like this:
> 
> WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.

I don't have this problem, neither with my PPC32 defconfigs nor with 
ppc64e_defconfig - SPARSEMEM_VMEMMAP + KASAN
Using GCC 8.1

I've been looking into it in more details and can't understand the need 
for a weak symbol. A weak symbol is to allow it's optional replacement 
by other code. But here KASAN replaces it inconditionally, so I see no 
point for a weak symbol here.

Regarding the export of the functions, I believe that when the functions 
are defined in KASAN, they should be exported by KASAN and not by the 
arch. But such a change is out of scope for now. So lets have a double 
export for now, one day we will drop it.

Regarding export of __memcpy() etc..., there is at least the LKDTM 
module which inhibits KASAN, so it really needs to be exported.

What about the patch below ?

Christophe

diff --git a/arch/powerpc/include/asm/kasan.h 
b/arch/powerpc/include/asm/kasan.h
new file mode 100644
index 000000000000..2c179a39d4ba
--- /dev/null
+++ b/arch/powerpc/include/asm/kasan.h
@@ -0,0 +1,15 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef __ASM_KASAN_H
+#define __ASM_KASAN_H
+
+#ifdef CONFIG_KASAN
+#define _GLOBAL_KASAN(fn)	_GLOBAL(__##fn)
+#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(__##fn)
+#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn)
+#else
+#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
+#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
+#define EXPORT_SYMBOL_KASAN(fn)
+#endif
+
+#endif
diff --git a/arch/powerpc/include/asm/string.h 
b/arch/powerpc/include/asm/string.h
index 1647de15a31e..9bf6dffb4090 100644
--- a/arch/powerpc/include/asm/string.h
+++ b/arch/powerpc/include/asm/string.h
@@ -4,14 +4,17 @@

  #ifdef __KERNEL__

+#ifndef CONFIG_KASAN
  #define __HAVE_ARCH_STRNCPY
  #define __HAVE_ARCH_STRNCMP
+#define __HAVE_ARCH_MEMCHR
+#define __HAVE_ARCH_MEMCMP
+#define __HAVE_ARCH_MEMSET16
+#endif
+
  #define __HAVE_ARCH_MEMSET
  #define __HAVE_ARCH_MEMCPY
  #define __HAVE_ARCH_MEMMOVE
-#define __HAVE_ARCH_MEMCMP
-#define __HAVE_ARCH_MEMCHR
-#define __HAVE_ARCH_MEMSET16
  #define __HAVE_ARCH_MEMCPY_FLUSHCACHE

  extern char * strcpy(char *,const char *);
@@ -27,7 +30,27 @@ extern int memcmp(const void *,const void 
*,__kernel_size_t);
  extern void * memchr(const void *,int,__kernel_size_t);
  extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);

+void *__memset(void *s, int c, __kernel_size_t count);
+void *__memcpy(void *to, const void *from, __kernel_size_t n);
+void *__memmove(void *to, const void *from, __kernel_size_t n);
+
+#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
+/*
+ * For files that are not instrumented (e.g. mm/slub.c) we
+ * should use not instrumented version of mem* functions.
+ */
+#define memcpy(dst, src, len) __memcpy(dst, src, len)
+#define memmove(dst, src, len) __memmove(dst, src, len)
+#define memset(s, c, n) __memset(s, c, n)
+
+#ifndef __NO_FORTIFY
+#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
+#endif
+
+#endif
+
  #ifdef CONFIG_PPC64
+#ifndef CONFIG_KASAN
  #define __HAVE_ARCH_MEMSET32
  #define __HAVE_ARCH_MEMSET64

@@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, 
__kernel_size_t n)
  {
  	return __memset64(p, v, n * 8);
  }
+#endif
  #else
+#ifndef CONFIG_KASAN
  #define __HAVE_ARCH_STRLEN
+#endif

  extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
  #endif
diff --git a/arch/powerpc/kernel/prom_init_check.sh 
b/arch/powerpc/kernel/prom_init_check.sh
index 667df97d2595..181fd10008ef 100644
--- a/arch/powerpc/kernel/prom_init_check.sh
+++ b/arch/powerpc/kernel/prom_init_check.sh
@@ -16,8 +16,16 @@
  # If you really need to reference something from prom_init.o add
  # it to the list below:

+grep "^CONFIG_KASAN=y$" .config >/dev/null
+if [ $? -eq 0 ]
+then
+	MEM_FUNCS="__memcpy __memset"
+else
+	MEM_FUNCS="memcpy memset"
+fi
+
  WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
-_end enter_prom memcpy memset reloc_offset __secondary_hold
+_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
  __secondary_hold_acknowledge __secondary_hold_spinloop __start
  strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
  reloc_got2 kernstart_addr memstart_addr linux_banner _stext
diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
index 79396e184bca..47a4de434c22 100644
--- a/arch/powerpc/lib/Makefile
+++ b/arch/powerpc/lib/Makefile
@@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
  CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
  CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)

-obj-y += string.o alloc.o code-patching.o feature-fixups.o
+obj-y += alloc.o code-patching.o feature-fixups.o

-obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
+ifndef CONFIG_KASAN
+obj-y	+=	string.o memcmp_$(BITS).o
+obj-$(CONFIG_PPC32)	+= strlen_32.o
+endif
+
+obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o

  obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o

@@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= 
test_emulate_step.o \
  					   test_emulate_step_exec_instr.o

  obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
-			   string_$(BITS).o memcmp_$(BITS).o
+			   string_$(BITS).o

  obj-y			+= sstep.o ldstfp.o quad.o
  obj64-y			+= quad.o
diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
index ba66846fe973..d5642481fb98 100644
--- a/arch/powerpc/lib/copy_32.S
+++ b/arch/powerpc/lib/copy_32.S
@@ -14,6 +14,7 @@
  #include <asm/ppc_asm.h>
  #include <asm/export.h>
  #include <asm/code-patching-asm.h>
+#include <asm/kasan.h>

  #define COPY_16_BYTES		\
  	lwz	r7,4(r4);	\
@@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
  LG_CACHELINE_BYTES = L1_CACHE_SHIFT
  CACHELINE_MASK = (L1_CACHE_BYTES-1)

+#ifndef CONFIG_KASAN
  _GLOBAL(memset16)
  	rlwinm.	r0 ,r5, 31, 1, 31
  	addi	r6, r3, -4
@@ -81,6 +83,7 @@ _GLOBAL(memset16)
  	sth	r4, 4(r6)
  	blr
  EXPORT_SYMBOL(memset16)
+#endif

  /*
   * Use dcbz on the complete cache lines in the destination
@@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
   * We therefore skip the optimised bloc that uses dcbz. This jump is
   * replaced by a nop once cache is active. This is done in machine_init()
   */
-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
  	cmplwi	0,r5,4
  	blt	7f

@@ -151,6 +154,7 @@ _GLOBAL(memset)
  	bdnz	9b
  	blr
  EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)

  /*
   * This version uses dcbz on the complete cache lines in the
@@ -163,12 +167,12 @@ EXPORT_SYMBOL(memset)
   * We therefore jump to generic_memcpy which doesn't use dcbz. This 
jump is
   * replaced by a nop once cache is active. This is done in machine_init()
   */
-_GLOBAL(memmove)
+_GLOBAL_KASAN(memmove)
  	cmplw	0,r3,r4
  	bgt	backwards_memcpy
  	/* fall through */

-_GLOBAL(memcpy)
+_GLOBAL_KASAN(memcpy)
  1:	b	generic_memcpy
  	patch_site	1b, patch__memcpy_nocache

@@ -244,6 +248,8 @@ _GLOBAL(memcpy)
  65:	blr
  EXPORT_SYMBOL(memcpy)
  EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memcpy)
+EXPORT_SYMBOL_KASAN(memmove)

  generic_memcpy:
  	srwi.	r7,r5,3
diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
index 3c3be02f33b7..7f6bd031c306 100644
--- a/arch/powerpc/lib/mem_64.S
+++ b/arch/powerpc/lib/mem_64.S
@@ -12,7 +12,9 @@
  #include <asm/errno.h>
  #include <asm/ppc_asm.h>
  #include <asm/export.h>
+#include <asm/kasan.h>

+#ifndef CONFIG_KASAN
  _GLOBAL(__memset16)
  	rlwimi	r4,r4,16,0,15
  	/* fall through */
@@ -29,8 +31,9 @@ _GLOBAL(__memset64)
  EXPORT_SYMBOL(__memset16)
  EXPORT_SYMBOL(__memset32)
  EXPORT_SYMBOL(__memset64)
+#endif

-_GLOBAL(memset)
+_GLOBAL_KASAN(memset)
  	neg	r0,r3
  	rlwimi	r4,r4,8,16,23
  	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
@@ -96,8 +99,9 @@ _GLOBAL(memset)
  	stb	r4,0(r6)
  	blr
  EXPORT_SYMBOL(memset)
+EXPORT_SYMBOL_KASAN(memset)

-_GLOBAL_TOC(memmove)
+_GLOBAL_TOC_KASAN(memmove)
  	cmplw	0,r3,r4
  	bgt	backwards_memcpy
  	b	memcpy
@@ -139,3 +143,4 @@ _GLOBAL(backwards_memcpy)
  	mtctr	r7
  	b	1b
  EXPORT_SYMBOL(memmove)
+EXPORT_SYMBOL_KASAN(memmove)
diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
index 273ea67e60a1..25c3772c1dfb 100644
--- a/arch/powerpc/lib/memcpy_64.S
+++ b/arch/powerpc/lib/memcpy_64.S
@@ -11,6 +11,7 @@
  #include <asm/export.h>
  #include <asm/asm-compat.h>
  #include <asm/feature-fixups.h>
+#include <asm/kasan.h>

  #ifndef SELFTEST_CASE
  /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
@@ -18,7 +19,7 @@
  #endif

  	.align	7
-_GLOBAL_TOC(memcpy)
+_GLOBAL_TOC_KASAN(memcpy)
  BEGIN_FTR_SECTION
  #ifdef __LITTLE_ENDIAN__
  	cmpdi	cr7,r5,0
@@ -230,3 +231,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
  	blr
  #endif
  EXPORT_SYMBOL(memcpy)
+EXPORT_SYMBOL_KASAN(memcpy)


> 
> It seems to be related to the export line, as if I swap the exports to
> do fn before __##fn I get:
> 
> WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.
> 
> I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
> This works - no warning:
> 
> EXPORT_SYMBOL(memset)
> EXPORT_SYMBOL(__memset)
> 
> This throws a warning:
> 
> EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)
> 
> I notice in looking at the diff of preprocessed source we end up
> invoking an asm macro that doesn't seem to have a full final argument, I
> wonder if that's relevant...
> 
> -___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
> +___EXPORT_SYMBOL __memset, __memset,
> +___EXPORT_SYMBOL memset, memset,
> 
> I also notice that nowhere else in the source do people have multiple
> EXPORT_SYMBOLs on the same line, and other arches seem to just
> unconditionally export both symbols on multiple lines.
> 
> I have no idea how this works for you - maybe it's affected by something 32bit.
> 
> How would you feel about this approach instead? I'm not tied to any of
> the names or anything.
> 
> diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
> index e0637730a8e7..7b6a91b448dd 100644
> --- a/arch/powerpc/include/asm/ppc_asm.h
> +++ b/arch/powerpc/include/asm/ppc_asm.h
> @@ -214,6 +214,9 @@ name: \
>   
>   #define DOTSYM(a)      a
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #else
>   
>   #define XGLUE(a,b) a##b
> @@ -236,6 +239,10 @@ GLUE(.,name):
>   
>   #define DOTSYM(a)      GLUE(.,a)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ; \
> +       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
> +
>   #endif
>   
>   #else /* 32-bit */
> @@ -251,6 +258,9 @@ GLUE(.,name):
>   
>   #define _GLOBAL_TOC(name) _GLOBAL(name)
>   
> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
> +       .weak weakname ; .set weakname, strongname ;
> +
>   #endif
>   
>   /*
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
>   EXPORT_SYMBOL(__memset64)
>   #endif
>   
> -_GLOBAL_KASAN(memset)
> +PROVIDE_WEAK_ALIAS(__memset,memset)
> +_GLOBAL(__memset)
>          neg     r0,r3
>          rlwimi  r4,r4,8,16,23
>          andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
> @@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
>   10:    bflr    31
>          stb     r4,0(r6)
>          blr
> -EXPORT_SYMBOL_KASAN(memset)
> +EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL(__memset)
>   
> -_GLOBAL_TOC_KASAN(memmove)
> +PROVIDE_WEAK_ALIAS(__memmove,memove)
> +_GLOBAL_TOC(__memmove)
>          cmplw   0,r3,r4
>          bgt     backwards_memcpy
>          b       memcpy
> @@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
>          beq     2b
>          mtctr   r7
>          b       1b
> -EXPORT_SYMBOL_KASAN(memmove)
> +EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL(__memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 862b515b8868..7c1b09556cad 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -19,7 +19,8 @@
>   #endif
>   
>          .align  7
> -_GLOBAL_TOC_KASAN(memcpy)
> +PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
> +_GLOBAL_TOC(__memcpy)
>   BEGIN_FTR_SECTION
>   #ifdef __LITTLE_ENDIAN__
>          cmpdi   cr7,r5,0
> @@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>   4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
>          blr
>   #endif
> -EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL(__memcpy)
> +EXPORT_SYMBOL(memcpy)
> 
> 
> Regards,
> Daniel
> 
> 
>> +#else
>> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
>> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
>> +#endif
>> +
>> +#endif
>> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
>> index 1647de15a31e..9bf6dffb4090 100644
>> --- a/arch/powerpc/include/asm/string.h
>> +++ b/arch/powerpc/include/asm/string.h
>> @@ -4,14 +4,17 @@
>>   
>>   #ifdef __KERNEL__
>>   
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRNCPY
>>   #define __HAVE_ARCH_STRNCMP
>> +#define __HAVE_ARCH_MEMCHR
>> +#define __HAVE_ARCH_MEMCMP
>> +#define __HAVE_ARCH_MEMSET16
>> +#endif
>> +
>>   #define __HAVE_ARCH_MEMSET
>>   #define __HAVE_ARCH_MEMCPY
>>   #define __HAVE_ARCH_MEMMOVE
>> -#define __HAVE_ARCH_MEMCMP
>> -#define __HAVE_ARCH_MEMCHR
>> -#define __HAVE_ARCH_MEMSET16
>>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>>   
>>   extern char * strcpy(char *,const char *);
>> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>>   extern void * memchr(const void *,int,__kernel_size_t);
>>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>>   
>> +void *__memset(void *s, int c, __kernel_size_t count);
>> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
>> +void *__memmove(void *to, const void *from, __kernel_size_t n);
>> +
>> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
>> +/*
>> + * For files that are not instrumented (e.g. mm/slub.c) we
>> + * should use not instrumented version of mem* functions.
>> + */
>> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
>> +#define memmove(dst, src, len) __memmove(dst, src, len)
>> +#define memset(s, c, n) __memset(s, c, n)
>> +
>> +#ifndef __NO_FORTIFY
>> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
>> +#endif
>> +
>> +#endif
>> +
>>   #ifdef CONFIG_PPC64
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_MEMSET32
>>   #define __HAVE_ARCH_MEMSET64
>>   
>> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>>   {
>>   	return __memset64(p, v, n * 8);
>>   }
>> +#endif
>>   #else
>> +#ifndef CONFIG_KASAN
>>   #define __HAVE_ARCH_STRLEN
>> +#endif
>>   
>>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>>   #endif
>> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
>> index 667df97d2595..181fd10008ef 100644
>> --- a/arch/powerpc/kernel/prom_init_check.sh
>> +++ b/arch/powerpc/kernel/prom_init_check.sh
>> @@ -16,8 +16,16 @@
>>   # If you really need to reference something from prom_init.o add
>>   # it to the list below:
>>   
>> +grep "^CONFIG_KASAN=y$" .config >/dev/null
>> +if [ $? -eq 0 ]
>> +then
>> +	MEM_FUNCS="__memcpy __memset"
>> +else
>> +	MEM_FUNCS="memcpy memset"
>> +fi
>> +
>>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
>> -_end enter_prom memcpy memset reloc_offset __secondary_hold
>> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>> index 79396e184bca..47a4de434c22 100644
>> --- a/arch/powerpc/lib/Makefile
>> +++ b/arch/powerpc/lib/Makefile
>> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>>   
>> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
>> +obj-y += alloc.o code-patching.o feature-fixups.o
>>   
>> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
>> +ifndef CONFIG_KASAN
>> +obj-y	+=	string.o memcmp_$(BITS).o
>> +obj-$(CONFIG_PPC32)	+= strlen_32.o
>> +endif
>> +
>> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>>   
>>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>>   
>> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>>   					   test_emulate_step_exec_instr.o
>>   
>>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
>> -			   string_$(BITS).o memcmp_$(BITS).o
>> +			   string_$(BITS).o
>>   
>>   obj-y			+= sstep.o ldstfp.o quad.o
>>   obj64-y			+= quad.o
>> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
>> index ba66846fe973..fc4fa7246200 100644
>> --- a/arch/powerpc/lib/copy_32.S
>> +++ b/arch/powerpc/lib/copy_32.S
>> @@ -14,6 +14,7 @@
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>>   #include <asm/code-patching-asm.h>
>> +#include <asm/kasan.h>
>>   
>>   #define COPY_16_BYTES		\
>>   	lwz	r7,4(r4);	\
>> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(memset16)
>>   	rlwinm.	r0 ,r5, 31, 1, 31
>>   	addi	r6, r3, -4
>> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>>   	sth	r4, 4(r6)
>>   	blr
>>   EXPORT_SYMBOL(memset16)
>> +#endif
>>   
>>   /*
>>    * Use dcbz on the complete cache lines in the destination
>> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	cmplwi	0,r5,4
>>   	blt	7f
>>   
>> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>>   9:	stbu	r4,1(r6)
>>   	bdnz	9b
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>>   /*
>>    * This version uses dcbz on the complete cache lines in the
>> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>>    * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>>    * replaced by a nop once cache is active. This is done in machine_init()
>>    */
>> -_GLOBAL(memmove)
>> +_GLOBAL_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	/* fall through */
>>   
>> -_GLOBAL(memcpy)
>> +_GLOBAL_KASAN(memcpy)
>>   1:	b	generic_memcpy
>>   	patch_site	1b, patch__memcpy_nocache
>>   
>> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>>   	stbu	r0,1(r6)
>>   	bdnz	40b
>>   65:	blr
>> -EXPORT_SYMBOL(memcpy)
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> +EXPORT_SYMBOL_KASAN(memmove)
>>   
>>   generic_memcpy:
>>   	srwi.	r7,r5,3
>> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
>> index 3c3be02f33b7..7cd6cf6822a2 100644
>> --- a/arch/powerpc/lib/mem_64.S
>> +++ b/arch/powerpc/lib/mem_64.S
>> @@ -12,7 +12,9 @@
>>   #include <asm/errno.h>
>>   #include <asm/ppc_asm.h>
>>   #include <asm/export.h>
>> +#include <asm/kasan.h>
>>   
>> +#ifndef CONFIG_KASAN
>>   _GLOBAL(__memset16)
>>   	rlwimi	r4,r4,16,0,15
>>   	/* fall through */
>> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>>   EXPORT_SYMBOL(__memset16)
>>   EXPORT_SYMBOL(__memset32)
>>   EXPORT_SYMBOL(__memset64)
>> +#endif
>>   
>> -_GLOBAL(memset)
>> +_GLOBAL_KASAN(memset)
>>   	neg	r0,r3
>>   	rlwimi	r4,r4,8,16,23
>>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
>> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>>   10:	bflr	31
>>   	stb	r4,0(r6)
>>   	blr
>> -EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL_KASAN(memset)
>>   
>> -_GLOBAL_TOC(memmove)
>> +_GLOBAL_TOC_KASAN(memmove)
>>   	cmplw	0,r3,r4
>>   	bgt	backwards_memcpy
>>   	b	memcpy
>> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>>   	beq	2b
>>   	mtctr	r7
>>   	b	1b
>> -EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL_KASAN(memmove)
>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>> index 273ea67e60a1..862b515b8868 100644
>> --- a/arch/powerpc/lib/memcpy_64.S
>> +++ b/arch/powerpc/lib/memcpy_64.S
>> @@ -11,6 +11,7 @@
>>   #include <asm/export.h>
>>   #include <asm/asm-compat.h>
>>   #include <asm/feature-fixups.h>
>> +#include <asm/kasan.h>
>>   
>>   #ifndef SELFTEST_CASE
>>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
>> @@ -18,7 +19,7 @@
>>   #endif
>>   
>>   	.align	7
>> -_GLOBAL_TOC(memcpy)
>> +_GLOBAL_TOC_KASAN(memcpy)
>>   BEGIN_FTR_SECTION
>>   #ifdef __LITTLE_ENDIAN__
>>   	cmpdi	cr7,r5,0
>> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>   4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>>   	blr
>>   #endif
>> -EXPORT_SYMBOL(memcpy)
>> +EXPORT_SYMBOL_KASAN(memcpy)
>> -- 
>> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Daniel Axtens]

[-- Attachment #1: Type: text/plain, Size: 1744 bytes --]

Christophe Leroy <christophe.leroy@c-s.fr> writes:

> Le 04/03/2019 à 06:26, Daniel Axtens a écrit :
>> Hi Christophe,
>>> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
>>> new file mode 100644
>>> index 000000000000..c3161b8fc017
>>> --- /dev/null
>>> +++ b/arch/powerpc/include/asm/kasan.h
>>> @@ -0,0 +1,15 @@
>>> +/* SPDX-License-Identifier: GPL-2.0 */
>>> +#ifndef __ASM_KASAN_H
>>> +#define __ASM_KASAN_H
>>> +
>>> +#ifdef CONFIG_KASAN
>>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
>> 
>> I'm having some trouble with this. I get warnings like this:
>
> I don't have such problem, neither with ppc32 nor with ppc64e_defconfig.
>

Fascinating, I'll dig into that more.

> What config are you using ?

Attached, it's based on the one provided with the SDK for the T4240RDB.

> Another (unrelated) question I have:
> On the initial arm64 implementation (39d114ddc682 arm64: add KASAN 
> support) they made KASAN implementation depend on SPARSEMEM_VMEMMAP 
> (allthough they later removed that dependency with commit e17d8025f07e 
> arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow)
>
> So I'm wondering why on your side, KASAN depends on !SPARSEMEM_VMEMMAP

I use the vmemmap area as the shadow region for kasan, in a way that
takes absolutely no account of any other use. It's very possible that I
could instead do something similar to what arm64 used to do - I think
one of the previous ppc64 approaches did something similar too.

Regards,
Daniel


[-- Attachment #2: .config --]
[-- Type: application/octet-stream, Size: 86167 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/powerpc 5.0.0-rc2 Kernel Configuration
#

#
# Compiler: powerpc64-linux-gnu-gcc (Ubuntu 8.2.0-7ubuntu1) 8.2.0
#
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=80200
CONFIG_CLANG_VERSION=0
CONFIG_CC_HAS_ASM_GOTO=y
CONFIG_CONSTRUCTORS=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_EXTABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y

#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_KERNEL_GZIP=y
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_CROSS_MEMORY_ATTACH=y
CONFIG_USELIB=y
CONFIG_AUDIT=y
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
CONFIG_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
CONFIG_GENERIC_IRQ_MIGRATION=y
CONFIG_IRQ_DOMAIN=y
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_ARCH_HAS_TICK_BROADCAST=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_GENERIC_CMOS_UPDATE=y

#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set

#
# CPU/Task time and stats accounting
#
CONFIG_VIRT_CPU_ACCOUNTING=y
# CONFIG_TICK_CPU_ACCOUNTING is not set
CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y
# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
# CONFIG_TASKSTATS is not set
# CONFIG_PSI is not set
CONFIG_CPU_ISOLATION=y

#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TREE_SRCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_BUILD_BIN2C=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
CONFIG_LOG_CPU_MAX_BUF_SHIFT=14
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=14
CONFIG_CGROUPS=y
CONFIG_PAGE_COUNTER=y
CONFIG_MEMCG=y
# CONFIG_MEMCG_SWAP is not set
CONFIG_MEMCG_KMEM=y
CONFIG_BLK_CGROUP=y
# CONFIG_DEBUG_BLK_CGROUP is not set
CONFIG_CGROUP_WRITEBACK=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_CFS_BANDWIDTH=y
# CONFIG_RT_GROUP_SCHED is not set
CONFIG_CGROUP_PIDS=y
# CONFIG_CGROUP_RDMA is not set
# CONFIG_CGROUP_FREEZER is not set
# CONFIG_CGROUP_HUGETLB is not set
# CONFIG_CPUSETS is not set
# CONFIG_CGROUP_DEVICE is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_PERF=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
# CONFIG_USER_NS is not set
CONFIG_PID_NS=y
CONFIG_NET_NS=y
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y
# CONFIG_LD_DEAD_CODE_DATA_ELIMINATION is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_BPF=y
CONFIG_EXPERT=y
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
# CONFIG_SYSCTL_SYSCALL is not set
# CONFIG_FHANDLE is not set
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_PRINTK_NMI=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_BASE_RELATIVE=y
# CONFIG_BPF_SYSCALL is not set
# CONFIG_USERFAULTFD is not set
CONFIG_ARCH_HAS_MEMBARRIER_CALLBACKS=y
CONFIG_RSEQ=y
# CONFIG_DEBUG_RSEQ is not set
CONFIG_EMBEDDED=y
CONFIG_HAVE_PERF_EVENTS=y
# CONFIG_PC104 is not set

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
CONFIG_SLAB_MERGE_DEFAULT=y
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_PROFILING is not set
CONFIG_TRACEPOINTS=y
CONFIG_PPC64=y

#
# Processor support
#
# CONFIG_PPC_BOOK3S_64 is not set
CONFIG_PPC_BOOK3E_64=y
# CONFIG_GENERIC_CPU is not set
# CONFIG_E5500_CPU is not set
CONFIG_E6500_CPU=y
CONFIG_TARGET_CPU_BOOL=y
CONFIG_PPC_BOOK3E=y
CONFIG_E500=y
CONFIG_PPC_E500MC=y
CONFIG_PPC_FPU=y
CONFIG_FSL_EMB_PERFMON=y
CONFIG_FSL_EMB_PERF_EVENT=y
CONFIG_FSL_EMB_PERF_EVENT_E500=y
CONFIG_BOOKE=y
CONFIG_PPC_FSL_BOOK3E=y
CONFIG_PTE_64BIT=y
CONFIG_PHYS_64BIT=y
CONFIG_ALTIVEC=y
CONFIG_PPC_MMU_NOHASH=y
CONFIG_PPC_BOOK3E_MMU=y
CONFIG_SMP=y
CONFIG_NR_CPUS=24
CONFIG_PPC_DOORBELL=y
CONFIG_VDSO32=y
CONFIG_CPU_BIG_ENDIAN=y
CONFIG_64BIT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MAX=32
CONFIG_ARCH_MMAP_RND_BITS_MIN=18
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=17
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=11
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NR_IRQS=512
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_PPC=y
CONFIG_PPC_BARRIER_NOSPEC=y
CONFIG_EARLY_PRINTK=y
CONFIG_PANIC_TIMEOUT=180
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_PPC_UDBG_16550=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
CONFIG_DEFAULT_UIMAGE=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_PPC_ADV_DEBUG_REGS=y
CONFIG_PPC_ADV_DEBUG_IACS=2
CONFIG_PPC_ADV_DEBUG_DACS=2
CONFIG_PPC_ADV_DEBUG_DVCS=0
CONFIG_ZONE_DMA=y
CONFIG_PGTABLE_LEVELS=4
CONFIG_PPC_MSI_BITMAP=y
CONFIG_FSL_CORENET_RCPM=y

#
# Platform support
#
CONFIG_FSL_SOC_BOOKE=y
# CONFIG_PPC_QEMU_E500 is not set
CONFIG_CORENET_GENERIC=y
# CONFIG_KVM_GUEST is not set
CONFIG_EPAPR_PARAVIRT=y
# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set
CONFIG_PPC_SMP_MUXED_IPI=y
CONFIG_MPIC=y
# CONFIG_MPIC_TIMER is not set
CONFIG_PPC_EPAPR_HV_PIC=y
# CONFIG_MPIC_MSGR is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set

#
# CPUIdle driver
#

#
# CPU Idle
#
# CONFIG_CPU_IDLE is not set
# CONFIG_GEN_RTC is not set
# CONFIG_SIMPLE_GPIO is not set

#
# Kernel options
#
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_SCHED_HRTICK=y
CONFIG_HUGETLB_PAGE_SIZE_VARIABLE=y
CONFIG_MATH_EMULATION=y
# CONFIG_MATH_EMULATION_FULL is not set
CONFIG_MATH_EMULATION_HW_UNIMPLEMENTED=y
# CONFIG_LD_HEAD_STUB_CATCH is not set
# CONFIG_HOTPLUG_CPU is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
# CONFIG_KEXEC is not set
# CONFIG_KEXEC_FILE is not set
# CONFIG_RELOCATABLE is not set
# CONFIG_CRASH_DUMP is not set
CONFIG_IRQ_ALL_CPUS=y
# CONFIG_NUMA is not set
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_SYS_SUPPORTS_HUGETLBFS=y
CONFIG_ILLEGAL_POINTER_VALUE=0x5deadbeef0000000
CONFIG_PPC_4K_PAGES=y
CONFIG_PPC_PAGE_SHIFT=12
CONFIG_THREAD_SHIFT=14
CONFIG_ETEXT_SHIFT=12
CONFIG_DATA_SHIFT=12
CONFIG_FORCE_MAX_ZONEORDER=13
# CONFIG_SCHED_SMT is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_EXTRA_TARGETS=""
# CONFIG_HIBERNATION is not set
# CONFIG_PM is not set
CONFIG_SECCOMP=y
CONFIG_ISA_DMA_API=y

#
# Bus options
#
CONFIG_GENERIC_ISA_DMA=y
CONFIG_PPC_INDIRECT_PCI=y
CONFIG_FSL_SOC=y
CONFIG_FSL_PCI=y
CONFIG_FSL_LBC=y
CONFIG_PAGE_OFFSET=0xc000000000000000
CONFIG_KERNEL_START=0xc000000000000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_VFIO=y
CONFIG_KVM_COMPAT=y
CONFIG_HAVE_KVM_IRQ_BYPASS=y
CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=y
CONFIG_KVM_BOOKE_HV=y
# CONFIG_KVM_EXIT_TIMING is not set
CONFIG_KVM_E500MC=y
# CONFIG_KVM_MPIC is not set
CONFIG_VHOST_NET=m
CONFIG_VHOST=m
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set

#
# General architecture-dependent options
#
CONFIG_CRASH_CORE=y
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_JUMP_LABEL=y
CONFIG_STATIC_KEYS_SELFTEST=y
CONFIG_OPTPROBES=y
CONFIG_UPROBES=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_KRETPROBES=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_HAVE_NMI=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_RCU_TABLE_FREE=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_ARCH_WEAK_RELEASE_ACQUIRE=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SECCOMP_FILTER=y
CONFIG_HAVE_STACKPROTECTOR=y
CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
CONFIG_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR_STRONG=y
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING=y
CONFIG_ARCH_HAS_SCALED_CPUTIME=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_ARCH_MMAP_RND_BITS=18
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
CONFIG_ARCH_MMAP_RND_COMPAT_BITS=11
CONFIG_CLONE_BACKWARDS=y
CONFIG_OLD_SIGSUSPEND=y
CONFIG_COMPAT_OLD_SIGACTION=y
CONFIG_COMPAT_32BIT_TIME=y
CONFIG_ARCH_HAS_PHYS_TO_DMA=y
# CONFIG_REFCOUNT_FULL is not set

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
CONFIG_PLUGIN_HOSTCC=""
CONFIG_HAVE_GCC_PLUGINS=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_MODULE_SIG is not set
# CONFIG_MODULE_COMPRESS is not set
# CONFIG_TRIM_UNUSED_KSYMS is not set
CONFIG_MODULES_TREE_LOOKUP=y
CONFIG_BLOCK=y
CONFIG_BLK_SCSI_REQUEST=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_ZONED is not set
# CONFIG_BLK_DEV_THROTTLING is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_CGROUP_IOLATENCY is not set
CONFIG_BLK_DEBUG_FS=y
# CONFIG_BLK_SED_OPAL is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
CONFIG_BLOCK_COMPAT=y
CONFIG_BLK_MQ_PCI=y

#
# IO Schedulers
#
CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_KYBER=y
# CONFIG_IOSCHED_BFQ is not set
CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_ASN1=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_ELFCORE=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_BINFMT_SCRIPT=y
CONFIG_BINFMT_MISC=m
CONFIG_COREDUMP=y

#
# Memory Management options
#
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
CONFIG_HAVE_GENERIC_GUP=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_BOUNCE=y
CONFIG_MMU_NOTIFIER=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
# CONFIG_CLEANCACHE is not set
# CONFIG_FRONTSWAP is not set
# CONFIG_CMA is not set
# CONFIG_ZPOOL is not set
# CONFIG_ZBUD is not set
# CONFIG_ZSMALLOC is not set
# CONFIG_IDLE_PAGE_TRACKING is not set
# CONFIG_PERCPU_STATS is not set
# CONFIG_GUP_BENCHMARK is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
CONFIG_NET=y
CONFIG_SKB_EXTENSIONS=y

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_DIAG is not set
CONFIG_UNIX=y
# CONFIG_UNIX_DIAG is not set
# CONFIG_TLS is not set
CONFIG_XFRM=y
CONFIG_XFRM_ALGO=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_INTERFACE is not set
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XFRM_IPCOMP=y
CONFIG_NET_KEY=y
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_FIB_TRIE_STATS is not set
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
CONFIG_NET_IPIP=y
# CONFIG_NET_IPGRE_DEMUX is not set
CONFIG_NET_IP_TUNNEL=y
CONFIG_IP_MROUTE_COMMON=y
CONFIG_IP_MROUTE=y
# CONFIG_IP_MROUTE_MULTIPLE_TABLES is not set
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
# CONFIG_SYN_COOKIES is not set
# CONFIG_NET_IPVTI is not set
# CONFIG_NET_FOU is not set
# CONFIG_NET_FOU_IP_TUNNELS is not set
CONFIG_INET_AH=y
CONFIG_INET_ESP=y
# CONFIG_INET_ESP_OFFLOAD is not set
CONFIG_INET_IPCOMP=y
CONFIG_INET_XFRM_TUNNEL=y
CONFIG_INET_TUNNEL=y
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_INET_UDP_DIAG is not set
# CONFIG_INET_RAW_DIAG is not set
# CONFIG_INET_DIAG_DESTROY is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=y
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
CONFIG_INET6_XFRM_MODE_BEET=y
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
# CONFIG_IPV6_VTI is not set
CONFIG_IPV6_SIT=y
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
# CONFIG_IPV6_SEG6_LWTUNNEL is not set
# CONFIG_IPV6_SEG6_HMAC is not set
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NET_PTP_CLASSIFY=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_BPFILTER is not set
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_OBJCNT is not set
CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1 is not set
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_NONE is not set
CONFIG_SCTP_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_COOKIE_HMAC_SHA1 is not set
CONFIG_INET_SCTP_DIAG=m
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
CONFIG_HAVE_NET_DSA=y
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=y
# CONFIG_VLAN_8021Q_GVRP is not set
# CONFIG_VLAN_8021Q_MVRP is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
# CONFIG_6LOWPAN is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
# CONFIG_VSOCKETS is not set
# CONFIG_NETLINK_DIAG is not set
# CONFIG_MPLS is not set
# CONFIG_NET_NSH is not set
# CONFIG_HSR is not set
# CONFIG_NET_SWITCHDEV is not set
# CONFIG_NET_L3_MASTER_DEV is not set
# CONFIG_NET_NCSI is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
# CONFIG_CGROUP_NET_PRIO is not set
# CONFIG_CGROUP_NET_CLASSID is not set
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y
# CONFIG_BPF_JIT is not set
CONFIG_NET_FLOW_LIMIT=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_DROP_MONITOR is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
# CONFIG_CFG80211 is not set

#
# CFG80211 needs to be enabled for MAC80211
#
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set
# CONFIG_PSAMPLE is not set
# CONFIG_NET_IFE is not set
# CONFIG_LWTUNNEL is not set
CONFIG_DST_CACHE=y
CONFIG_GRO_CELLS=y
# CONFIG_NET_DEVLINK is not set
CONFIG_MAY_USE_DEVLINK=y
# CONFIG_FAILOVER is not set
CONFIG_HAVE_EBPF_JIT=y

#
# Device Drivers
#
CONFIG_HAVE_PCI=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCI_SYSCALL=y
CONFIG_PCIEPORTBUS=y
CONFIG_PCIEAER=y
# CONFIG_PCIEAER_INJECT is not set
# CONFIG_PCIE_ECRC is not set
CONFIG_PCIEASPM=y
# CONFIG_PCIEASPM_DEBUG is not set
CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_POWERSAVE is not set
# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
# CONFIG_PCIEASPM_PERFORMANCE is not set
# CONFIG_PCIE_DPC is not set
# CONFIG_PCIE_PTM is not set
CONFIG_PCI_MSI=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
# CONFIG_PCI_IOV is not set
# CONFIG_PCI_PRI is not set
# CONFIG_PCI_PASID is not set
# CONFIG_HOTPLUG_PCI is not set

#
# PCI controller drivers
#

#
# Cadence PCIe controllers support
#
# CONFIG_PCIE_CADENCE_HOST is not set
# CONFIG_PCI_FTPCI100 is not set
# CONFIG_PCI_HOST_GENERIC is not set
# CONFIG_PCIE_XILINX is not set

#
# DesignWare PCI Core Support
#

#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set

#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
# CONFIG_PCCARD is not set
CONFIG_HAVE_RAPIDIO=y
# CONFIG_RAPIDIO is not set

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y

#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_FW_LOADER_USER_HELPER is not set
CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_GENERIC_CPU_VULNERABILITIES=y
CONFIG_SOC_BUS=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=y
CONFIG_REGMAP_SPI=y

#
# Bus devices
#
# CONFIG_CONNECTOR is not set
# CONFIG_GNSS is not set
CONFIG_MTD=y
# CONFIG_MTD_TESTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_OF_PARTS=y
# CONFIG_MTD_AR7_PARTS is not set

#
# Partition parsers
#
# CONFIG_MTD_REDBOOT_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_SM_FTL is not set
# CONFIG_MTD_OOPS is not set
# CONFIG_MTD_SWAP is not set
# CONFIG_MTD_PARTITIONED_MASTER is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
# CONFIG_MTD_PHYSMAP is not set
# CONFIG_MTD_INTEL_VR_NOR is not set
# CONFIG_MTD_PLATRAM is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_PMC551 is not set
# CONFIG_MTD_DATAFLASH is not set
CONFIG_MTD_M25P80=y
# CONFIG_MTD_MCHP23K256 is not set
# CONFIG_MTD_SST25L is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOCG3 is not set
# CONFIG_MTD_ONENAND is not set
CONFIG_MTD_NAND_ECC=y
# CONFIG_MTD_NAND_ECC_SMC is not set
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_ECC_BCH is not set
# CONFIG_MTD_NAND_DENALI_PCI is not set
# CONFIG_MTD_NAND_DENALI_DT is not set
# CONFIG_MTD_NAND_GPIO is not set
# CONFIG_MTD_NAND_RICOH is not set
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_CAFE is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_NAND_FSL_ELBC is not set
CONFIG_MTD_NAND_FSL_IFC=y
# CONFIG_MTD_SPI_NAND is not set

#
# LPDDR & LPDDR2 PCM memory drivers
#
# CONFIG_MTD_LPDDR is not set
CONFIG_MTD_SPI_NOR=y
# CONFIG_MTD_MT81xx_NOR is not set
# CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set
# CONFIG_MTD_UBI is not set
CONFIG_DTC=y
CONFIG_OF=y
# CONFIG_OF_UNITTEST is not set
CONFIG_OF_FLATTREE=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_KOBJ=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_IRQ=y
CONFIG_OF_NET=y
CONFIG_OF_MDIO=y
CONFIG_OF_RESERVED_MEM=y
# CONFIG_OF_OVERLAY is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_NULL_BLK is not set
# CONFIG_BLK_DEV_FD is not set
CONFIG_CDROM=y
# CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
# CONFIG_BLK_DEV_UMEM is not set
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SKD is not set
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=262144
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_BLK_DEV_RSXX is not set

#
# NVME Support
#
# CONFIG_BLK_DEV_NVME is not set
# CONFIG_NVME_FC is not set

#
# Misc devices
#
# CONFIG_AD525X_DPOT is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_PHANTOM is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_USB_SWITCH_FSA9480 is not set
# CONFIG_LATTICE_ECP3_CONFIG is not set
# CONFIG_SRAM is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_PVPANIC is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_AT24 is not set
# CONFIG_EEPROM_AT25 is not set
# CONFIG_EEPROM_LEGACY is not set
# CONFIG_EEPROM_MAX6875 is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_EEPROM_93XX46 is not set
# CONFIG_EEPROM_IDT_89HPESX is not set
# CONFIG_EEPROM_EE1004 is not set
# CONFIG_CB710_CORE is not set

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# CONFIG_SENSORS_LIS3_SPI is not set
# CONFIG_SENSORS_LIS3_I2C is not set
# CONFIG_ALTERA_STAPL is not set

#
# Intel MIC & related support
#

#
# Intel MIC Bus Driver
#

#
# SCIF Bus Driver
#

#
# VOP Bus Driver
#

#
# Intel MIC Host Driver
#

#
# Intel MIC Card Driver
#

#
# SCIF Driver
#

#
# Intel MIC Coprocessor State Management (COSM) Drivers
#

#
# VOP Driver
#
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_MISC_ALCOR_PCI is not set
# CONFIG_MISC_RTSX_PCI is not set
# CONFIG_MISC_RTSX_USB is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
# CONFIG_SCSI_CONSTANTS is not set
CONFIG_SCSI_LOGGING=y
# CONFIG_SCSI_SCAN_ASYNC is not set

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_ISCSI_BOOT_SYSFS is not set
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_BE2ISCSI is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_HPSA is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_3W_SAS is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_MVUMI is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ESAS2R is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_MPT3SAS is not set
# CONFIG_SCSI_MPT2SAS is not set
# CONFIG_SCSI_SMARTPQI is not set
# CONFIG_SCSI_UFSHCD is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_MYRB is not set
# CONFIG_SCSI_SNIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_WD719X is not set
# CONFIG_SCSI_DEBUG is not set
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_SATA_PMP=y

#
# Controllers with non-SFF native interface
#
# CONFIG_SATA_AHCI is not set
# CONFIG_SATA_AHCI_PLATFORM is not set
# CONFIG_AHCI_CEVA is not set
# CONFIG_AHCI_QORIQ is not set
CONFIG_SATA_FSL=y
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
CONFIG_SATA_SIL24=y
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
# CONFIG_ATA_PIIX is not set
# CONFIG_SATA_DWC is not set
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_SVW is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set

#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SCH is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_PATA_RZ1000 is not set

#
# Generic fallback / legacy drivers
#
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
# CONFIG_MD_AUTODETECT is not set
# CONFIG_MD_LINEAR is not set
# CONFIG_MD_RAID0 is not set
# CONFIG_MD_RAID1 is not set
# CONFIG_MD_RAID10 is not set
# CONFIG_MD_RAID456 is not set
# CONFIG_MD_MULTIPATH is not set
# CONFIG_MD_FAULTY is not set
# CONFIG_BCACHE is not set
# CONFIG_BLK_DEV_DM is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_EQUALIZER is not set
# CONFIG_NET_FC is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_MACSEC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_TUN is not set
# CONFIG_TUN_VNET_CROSS_LE is not set
# CONFIG_VETH is not set
# CONFIG_NLMON is not set
# CONFIG_ARCNET is not set

#
# CAIF transport drivers
#

#
# Distributed Switch Architecture drivers
#
CONFIG_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
# CONFIG_VORTEX is not set
# CONFIG_TYPHOON is not set
CONFIG_NET_VENDOR_ADAPTEC=y
# CONFIG_ADAPTEC_STARFIRE is not set
CONFIG_NET_VENDOR_AGERE=y
# CONFIG_ET131X is not set
CONFIG_NET_VENDOR_ALACRITECH=y
# CONFIG_SLICOSS is not set
CONFIG_NET_VENDOR_ALTEON=y
# CONFIG_ACENIC is not set
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
CONFIG_NET_VENDOR_AMD=y
# CONFIG_AMD8111_ETH is not set
# CONFIG_PCNET32 is not set
CONFIG_NET_VENDOR_AQUANTIA=y
CONFIG_NET_VENDOR_ARC=y
CONFIG_NET_VENDOR_ATHEROS=y
# CONFIG_ATL2 is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_ATL1C is not set
# CONFIG_ALX is not set
CONFIG_NET_VENDOR_AURORA=y
# CONFIG_AURORA_NB8800 is not set
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
# CONFIG_BCMGENET is not set
# CONFIG_BNX2 is not set
# CONFIG_CNIC is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2X is not set
# CONFIG_SYSTEMPORT is not set
# CONFIG_BNXT is not set
CONFIG_NET_VENDOR_BROCADE=y
# CONFIG_BNA is not set
CONFIG_NET_VENDOR_CADENCE=y
# CONFIG_MACB is not set
CONFIG_NET_VENDOR_CAVIUM=y
# CONFIG_THUNDER_NIC_PF is not set
# CONFIG_THUNDER_NIC_VF is not set
# CONFIG_THUNDER_NIC_BGX is not set
# CONFIG_THUNDER_NIC_RGX is not set
CONFIG_CAVIUM_PTP=y
# CONFIG_LIQUIDIO is not set
# CONFIG_LIQUIDIO_VF is not set
CONFIG_NET_VENDOR_CHELSIO=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
CONFIG_NET_VENDOR_CISCO=y
# CONFIG_ENIC is not set
CONFIG_NET_VENDOR_CORTINA=y
# CONFIG_GEMINI_ETHERNET is not set
# CONFIG_DNET is not set
CONFIG_NET_VENDOR_DEC=y
# CONFIG_NET_TULIP is not set
CONFIG_NET_VENDOR_DLINK=y
# CONFIG_DL2K is not set
# CONFIG_SUNDANCE is not set
CONFIG_NET_VENDOR_EMULEX=y
# CONFIG_BE2NET is not set
CONFIG_NET_VENDOR_EZCHIP=y
# CONFIG_EZCHIP_NPS_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_FREESCALE=y
# CONFIG_FSL_FMAN is not set
# CONFIG_FSL_PQ_MDIO is not set
CONFIG_FSL_XGMAC_MDIO=y
# CONFIG_GIANFAR is not set
CONFIG_NET_VENDOR_HP=y
# CONFIG_HP100 is not set
CONFIG_NET_VENDOR_HUAWEI=y
CONFIG_NET_VENDOR_I825XX=y
CONFIG_NET_VENDOR_INTEL=y
# CONFIG_E100 is not set
# CONFIG_E1000 is not set
CONFIG_E1000E=y
# CONFIG_IGB is not set
# CONFIG_IGBVF is not set
# CONFIG_IXGB is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGBEVF is not set
# CONFIG_I40E is not set
# CONFIG_I40EVF is not set
# CONFIG_ICE is not set
# CONFIG_FM10K is not set
# CONFIG_IGC is not set
# CONFIG_JME is not set
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_MVMDIO is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
CONFIG_NET_VENDOR_MELLANOX=y
# CONFIG_MLX4_EN is not set
# CONFIG_MLX5_CORE is not set
# CONFIG_MLXSW_CORE is not set
# CONFIG_MLXFW is not set
CONFIG_NET_VENDOR_MICREL=y
# CONFIG_KS8842 is not set
# CONFIG_KS8851 is not set
# CONFIG_KS8851_MLL is not set
# CONFIG_KSZ884X_PCI is not set
CONFIG_NET_VENDOR_MICROCHIP=y
# CONFIG_ENC28J60 is not set
# CONFIG_ENCX24J600 is not set
# CONFIG_LAN743X is not set
CONFIG_NET_VENDOR_MICROSEMI=y
CONFIG_NET_VENDOR_MYRI=y
# CONFIG_MYRI10GE is not set
# CONFIG_FEALNX is not set
CONFIG_NET_VENDOR_NATSEMI=y
# CONFIG_NATSEMI is not set
# CONFIG_NS83820 is not set
CONFIG_NET_VENDOR_NETERION=y
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
CONFIG_NET_VENDOR_NETRONOME=y
# CONFIG_NFP is not set
CONFIG_NET_VENDOR_NI=y
# CONFIG_NI_XGE_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_8390=y
# CONFIG_NE2K_PCI is not set
CONFIG_NET_VENDOR_NVIDIA=y
# CONFIG_FORCEDETH is not set
CONFIG_NET_VENDOR_OKI=y
# CONFIG_ETHOC is not set
CONFIG_NET_VENDOR_PACKET_ENGINES=y
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
CONFIG_NET_VENDOR_QLOGIC=y
# CONFIG_QLA3XXX is not set
# CONFIG_QLCNIC is not set
# CONFIG_QLGE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_QED is not set
CONFIG_NET_VENDOR_QUALCOMM=y
# CONFIG_QCA7000_SPI is not set
# CONFIG_QCOM_EMAC is not set
# CONFIG_RMNET is not set
CONFIG_NET_VENDOR_RDC=y
# CONFIG_R6040 is not set
CONFIG_NET_VENDOR_REALTEK=y
# CONFIG_8139CP is not set
# CONFIG_8139TOO is not set
# CONFIG_R8169 is not set
CONFIG_NET_VENDOR_RENESAS=y
CONFIG_NET_VENDOR_ROCKER=y
CONFIG_NET_VENDOR_SAMSUNG=y
# CONFIG_SXGBE_ETH is not set
CONFIG_NET_VENDOR_SEEQ=y
CONFIG_NET_VENDOR_SOLARFLARE=y
# CONFIG_SFC is not set
# CONFIG_SFC_FALCON is not set
CONFIG_NET_VENDOR_SILAN=y
# CONFIG_SC92031 is not set
CONFIG_NET_VENDOR_SIS=y
# CONFIG_SIS900 is not set
# CONFIG_SIS190 is not set
CONFIG_NET_VENDOR_SMSC=y
# CONFIG_EPIC100 is not set
# CONFIG_SMSC911X is not set
# CONFIG_SMSC9420 is not set
CONFIG_NET_VENDOR_SOCIONEXT=y
CONFIG_NET_VENDOR_STMICRO=y
# CONFIG_STMMAC_ETH is not set
CONFIG_NET_VENDOR_SUN=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NIU is not set
CONFIG_NET_VENDOR_SYNOPSYS=y
# CONFIG_DWC_XLGMAC is not set
CONFIG_NET_VENDOR_TEHUTI=y
# CONFIG_TEHUTI is not set
CONFIG_NET_VENDOR_TI=y
# CONFIG_TI_CPSW_ALE is not set
# CONFIG_TLAN is not set
CONFIG_NET_VENDOR_VIA=y
# CONFIG_VIA_RHINE is not set
# CONFIG_VIA_VELOCITY is not set
CONFIG_NET_VENDOR_WIZNET=y
# CONFIG_WIZNET_W5100 is not set
# CONFIG_WIZNET_W5300 is not set
CONFIG_NET_VENDOR_XILINX=y
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_BUS=y
# CONFIG_MDIO_BCM_UNIMAC is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_MDIO_BUS_MUX=y
# CONFIG_MDIO_BUS_MUX_GPIO is not set
CONFIG_MDIO_BUS_MUX_MMIOREG=y
# CONFIG_MDIO_HISI_FEMAC is not set
# CONFIG_MDIO_MSCC_MIIM is not set
# CONFIG_MDIO_OCTEON is not set
# CONFIG_MDIO_THUNDER is not set
CONFIG_PHYLIB=y
CONFIG_SWPHY=y

#
# MII PHY device drivers
#
# CONFIG_AMD_PHY is not set
CONFIG_AQUANTIA_PHY=y
# CONFIG_ASIX_PHY is not set
# CONFIG_AT803X_PHY is not set
# CONFIG_BCM7XXX_PHY is not set
# CONFIG_BCM87XX_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_CORTINA_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_DP83822_PHY is not set
# CONFIG_DP83TC811_PHY is not set
# CONFIG_DP83848_PHY is not set
# CONFIG_DP83867_PHY is not set
CONFIG_FIXED_PHY=y
# CONFIG_ICPLUS_PHY is not set
# CONFIG_INTEL_XWAY_PHY is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_MARVELL_10G_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_MICROCHIP_PHY is not set
# CONFIG_MICROCHIP_T1_PHY is not set
# CONFIG_MICROSEMI_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_RENESAS_PHY is not set
# CONFIG_ROCKCHIP_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_STE10XP is not set
CONFIG_TERANETICS_PHY=y
CONFIG_VITESSE_PHY=y
# CONFIG_XILINX_GMII2RGMII is not set
# CONFIG_MICREL_KS8995MA is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
CONFIG_USB_NET_DRIVERS=y
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_RTL8152 is not set
# CONFIG_USB_LAN78XX is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_IPHETH is not set
CONFIG_WLAN=y
# CONFIG_WIRELESS_WDS is not set
CONFIG_WLAN_VENDOR_ADMTEK=y
CONFIG_WLAN_VENDOR_ATH=y
# CONFIG_ATH_DEBUG is not set
# CONFIG_ATH5K_PCI is not set
CONFIG_WLAN_VENDOR_ATMEL=y
CONFIG_WLAN_VENDOR_BROADCOM=y
CONFIG_WLAN_VENDOR_CISCO=y
CONFIG_WLAN_VENDOR_INTEL=y
# CONFIG_IWLWIFI is not set
CONFIG_WLAN_VENDOR_INTERSIL=y
# CONFIG_HOSTAP is not set
# CONFIG_PRISM54 is not set
CONFIG_WLAN_VENDOR_MARVELL=y
CONFIG_WLAN_VENDOR_MEDIATEK=y
CONFIG_WLAN_VENDOR_RALINK=y
CONFIG_WLAN_VENDOR_REALTEK=y
CONFIG_WLAN_VENDOR_RSI=y
CONFIG_WLAN_VENDOR_ST=y
CONFIG_WLAN_VENDOR_TI=y
CONFIG_WLAN_VENDOR_ZYDAS=y
CONFIG_WLAN_VENDOR_QUANTENNA=y

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
# CONFIG_WAN is not set
# CONFIG_VMXNET3 is not set
# CONFIG_NETDEVSIM is not set
# CONFIG_NET_FAILOVER is not set
# CONFIG_ISDN is not set
# CONFIG_NVM is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
# CONFIG_RMI4_CORE is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_XILINX_XPS_PS2 is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_SERIO_ARC_PS2 is not set
# CONFIG_SERIO_APBPS2 is not set
# CONFIG_SERIO_OLPC_APSP is not set
# CONFIG_SERIO_GPIO_PS2 is not set
# CONFIG_USERIO is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_PPC_EPAPR_HV_BYTECHAN=y
# CONFIG_PPC_EARLY_DEBUG_EHV_BC is not set
CONFIG_DEVMEM=y
CONFIG_DEVKMEM=y

#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DMA=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_EXAR=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
# CONFIG_SERIAL_8250_ASPEED_VUART is not set
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_FSL=y
# CONFIG_SERIAL_8250_DW is not set
# CONFIG_SERIAL_8250_RT288X is not set
# CONFIG_SERIAL_8250_MOXA is not set
# CONFIG_SERIAL_OF_PLATFORM is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX310X is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_IFX6X60 is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
# CONFIG_HVC_UDBG is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
CONFIG_DEVPORT=y
# CONFIG_XILLYBUS is not set
# CONFIG_RANDOM_TRUST_CPU is not set

#
# I2C support
#
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_MUX=y

#
# Multiplexer I2C Chip support
#
# CONFIG_I2C_ARB_GPIO_CHALLENGE is not set
# CONFIG_I2C_MUX_GPIO is not set
# CONFIG_I2C_MUX_GPMUX is not set
# CONFIG_I2C_MUX_LTC4306 is not set
# CONFIG_I2C_MUX_PCA9541 is not set
CONFIG_I2C_MUX_PCA954x=y
# CONFIG_I2C_MUX_REG is not set
# CONFIG_I2C_MUX_MLXCPLD is not set
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_NVIDIA_GPU is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_CBUS_GPIO is not set
# CONFIG_I2C_DESIGNWARE_PLATFORM is not set
# CONFIG_I2C_DESIGNWARE_PCI is not set
# CONFIG_I2C_EMEV2 is not set
# CONFIG_I2C_GPIO is not set
CONFIG_I2C_MPC=y
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_RK3X is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_ROBOTFUZZ_OSIF is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_SLAVE is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I3C is not set
CONFIG_SPI=y
# CONFIG_SPI_DEBUG is not set
CONFIG_SPI_MASTER=y
CONFIG_SPI_MEM=y

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
# CONFIG_SPI_AXI_SPI_ENGINE is not set
CONFIG_SPI_BITBANG=y
# CONFIG_SPI_CADENCE is not set
# CONFIG_SPI_DESIGNWARE is not set
CONFIG_SPI_GPIO=y
CONFIG_SPI_FSL_LIB=y
CONFIG_SPI_FSL_CPM=y
CONFIG_SPI_FSL_SPI=y
CONFIG_SPI_FSL_ESPI=y
# CONFIG_SPI_OC_TINY is not set
# CONFIG_SPI_PXA2XX is not set
# CONFIG_SPI_ROCKCHIP is not set
# CONFIG_SPI_SC18IS602 is not set
# CONFIG_SPI_MXIC is not set
# CONFIG_SPI_XCOMM is not set
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_ZYNQMP_GQSPI is not set

#
# SPI Protocol Masters
#
# CONFIG_SPI_SPIDEV is not set
# CONFIG_SPI_LOOPBACK_TEST is not set
# CONFIG_SPI_TLE62X0 is not set
# CONFIG_SPI_SLAVE is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set

#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
# CONFIG_PPS_CLIENT_LDISC is not set
# CONFIG_PPS_CLIENT_GPIO is not set

#
# PPS generators support
#

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=y

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# CONFIG_PINCTRL is not set
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_OF_GPIO=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_GENERIC=y

#
# Memory mapped GPIO drivers
#
# CONFIG_GPIO_74XX_MMIO is not set
# CONFIG_GPIO_ALTERA is not set
# CONFIG_GPIO_CADENCE is not set
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_EXAR is not set
# CONFIG_GPIO_FTGPIO010 is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
# CONFIG_GPIO_GRGPIO is not set
# CONFIG_GPIO_HLWD is not set
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_MOCKUP is not set
CONFIG_GPIO_MPC8XXX=y
# CONFIG_GPIO_XILINX is not set

#
# I2C GPIO expanders
#
# CONFIG_GPIO_ADP5588 is not set
# CONFIG_GPIO_ADNP is not set
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_TPIC2810 is not set

#
# MFD GPIO expanders
#

#
# PCI GPIO expanders
#
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_PCI_IDIO_16 is not set
# CONFIG_GPIO_PCIE_IDIO_24 is not set
# CONFIG_GPIO_RDC321X is not set

#
# SPI GPIO expanders
#
# CONFIG_GPIO_74X164 is not set
# CONFIG_GPIO_MAX3191X is not set
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MC33880 is not set
# CONFIG_GPIO_PISOSR is not set
# CONFIG_GPIO_XRA1403 is not set

#
# USB GPIO expanders
#
# CONFIG_W1 is not set
# CONFIG_POWER_AVS is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
CONFIG_HWMON=y
CONFIG_HWMON_VID=y
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
# CONFIG_SENSORS_AD7314 is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7310 is not set
# CONFIG_SENSORS_ADT7410 is not set
# CONFIG_SENSORS_ADT7411 is not set
# CONFIG_SENSORS_ADT7462 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_ASC7621 is not set
# CONFIG_SENSORS_ASPEED is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS620 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_G762 is not set
# CONFIG_SENSORS_GPIO_FAN is not set
# CONFIG_SENSORS_HIH6130 is not set
# CONFIG_SENSORS_JC42 is not set
# CONFIG_SENSORS_POWR1220 is not set
# CONFIG_SENSORS_LINEAGE is not set
# CONFIG_SENSORS_LTC2945 is not set
# CONFIG_SENSORS_LTC2990 is not set
# CONFIG_SENSORS_LTC4151 is not set
# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4222 is not set
# CONFIG_SENSORS_LTC4245 is not set
# CONFIG_SENSORS_LTC4260 is not set
# CONFIG_SENSORS_LTC4261 is not set
# CONFIG_SENSORS_MAX1111 is not set
# CONFIG_SENSORS_MAX16065 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX1668 is not set
# CONFIG_SENSORS_MAX197 is not set
# CONFIG_SENSORS_MAX31722 is not set
# CONFIG_SENSORS_MAX6621 is not set
# CONFIG_SENSORS_MAX6639 is not set
# CONFIG_SENSORS_MAX6642 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_MAX6697 is not set
# CONFIG_SENSORS_MAX31790 is not set
# CONFIG_SENSORS_MCP3021 is not set
# CONFIG_SENSORS_TC654 is not set
# CONFIG_SENSORS_ADCXX is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM70 is not set
# CONFIG_SENSORS_LM73 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
CONFIG_SENSORS_LM90=y
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_LM95234 is not set
# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_LM95245 is not set
# CONFIG_SENSORS_NTC_THERMISTOR is not set
# CONFIG_SENSORS_NCT7802 is not set
# CONFIG_SENSORS_NCT7904 is not set
# CONFIG_SENSORS_NPCM7XX is not set
# CONFIG_SENSORS_OCC_P8_I2C is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_PMBUS is not set
# CONFIG_SENSORS_SHT15 is not set
# CONFIG_SENSORS_SHT21 is not set
# CONFIG_SENSORS_SHT3x is not set
# CONFIG_SENSORS_SHTC1 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_EMC1403 is not set
# CONFIG_SENSORS_EMC2103 is not set
# CONFIG_SENSORS_EMC6W201 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_STTS751 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_ADC128D818 is not set
# CONFIG_SENSORS_ADS1015 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_ADS7871 is not set
# CONFIG_SENSORS_AMC6821 is not set
# CONFIG_SENSORS_INA209 is not set
CONFIG_SENSORS_INA2XX=y
# CONFIG_SENSORS_INA3221 is not set
# CONFIG_SENSORS_TC74 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_TMP102 is not set
# CONFIG_SENSORS_TMP103 is not set
# CONFIG_SENSORS_TMP108 is not set
# CONFIG_SENSORS_TMP401 is not set
# CONFIG_SENSORS_TMP421 is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83773G is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
CONFIG_SENSORS_W83793=y
# CONFIG_SENSORS_W83795 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_ACT8945A is not set
# CONFIG_MFD_AS3711 is not set
# CONFIG_MFD_AS3722 is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_AT91_USART is not set
# CONFIG_MFD_ATMEL_FLEXCOM is not set
# CONFIG_MFD_ATMEL_HLCDC is not set
# CONFIG_MFD_BCM590XX is not set
# CONFIG_MFD_BD9571MWV is not set
# CONFIG_MFD_AXP20X_I2C is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_SPI is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_MFD_DA9055 is not set
# CONFIG_MFD_DA9062 is not set
# CONFIG_MFD_DA9063 is not set
# CONFIG_MFD_DA9150 is not set
# CONFIG_MFD_DLN2 is not set
# CONFIG_MFD_MC13XXX_SPI is not set
# CONFIG_MFD_MC13XXX_I2C is not set
# CONFIG_MFD_HI6421_PMIC is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_LPC_ICH is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_88PM800 is not set
# CONFIG_MFD_88PM805 is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_MAX14577 is not set
# CONFIG_MFD_MAX77620 is not set
# CONFIG_MFD_MAX77686 is not set
# CONFIG_MFD_MAX77693 is not set
# CONFIG_MFD_MAX77843 is not set
# CONFIG_MFD_MAX8907 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_MENF21BMC is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MFD_CPCAP is not set
# CONFIG_MFD_VIPERBOARD is not set
# CONFIG_MFD_RETU is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_RT5033 is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_MFD_RK808 is not set
# CONFIG_MFD_RN5T618 is not set
# CONFIG_MFD_SEC_CORE is not set
# CONFIG_MFD_SI476X_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SKY81452 is not set
# CONFIG_MFD_SMSC is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_LP3943 is not set
# CONFIG_MFD_LP8788 is not set
# CONFIG_MFD_TI_LMU is not set
# CONFIG_MFD_PALMAS is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65086 is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_TPS65217 is not set
# CONFIG_MFD_TI_LP873X is not set
# CONFIG_MFD_TI_LP87565 is not set
# CONFIG_MFD_TPS65218 is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS65912_SPI is not set
# CONFIG_MFD_TPS80031 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_LM3533 is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_MFD_ARIZONA_I2C is not set
# CONFIG_MFD_ARIZONA_SPI is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_ROHM_BD718XX is not set
# CONFIG_REGULATOR is not set
# CONFIG_RC_CORE is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_AGP is not set
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_DRM is not set
# CONFIG_DRM_DP_CEC is not set

#
# ACP (Audio CoProcessor) Configuration
#

#
# AMD Library routines
#

#
# Frame buffer Devices
#
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
# CONFIG_SOUND is not set

#
# HID support
#
CONFIG_HID=y
# CONFIG_HID_BATTERY_STRENGTH is not set
# CONFIG_HIDRAW is not set
# CONFIG_UHID is not set
CONFIG_HID_GENERIC=y

#
# Special HID drivers
#
# CONFIG_HID_A4TECH is not set
# CONFIG_HID_ACCUTOUCH is not set
# CONFIG_HID_ACRUX is not set
# CONFIG_HID_APPLE is not set
# CONFIG_HID_APPLEIR is not set
# CONFIG_HID_AUREAL is not set
# CONFIG_HID_BELKIN is not set
# CONFIG_HID_BETOP_FF is not set
# CONFIG_HID_CHERRY is not set
# CONFIG_HID_CHICONY is not set
# CONFIG_HID_COUGAR is not set
# CONFIG_HID_CMEDIA is not set
# CONFIG_HID_CYPRESS is not set
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_ELECOM is not set
# CONFIG_HID_ELO is not set
# CONFIG_HID_EZKEY is not set
# CONFIG_HID_GEMBIRD is not set
# CONFIG_HID_GFRM is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_KEYTOUCH is not set
# CONFIG_HID_KYE is not set
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
# CONFIG_HID_GYRATION is not set
# CONFIG_HID_ICADE is not set
# CONFIG_HID_ITE is not set
# CONFIG_HID_JABRA is not set
# CONFIG_HID_TWINHAN is not set
# CONFIG_HID_KENSINGTON is not set
# CONFIG_HID_LCPOWER is not set
# CONFIG_HID_LENOVO is not set
# CONFIG_HID_LOGITECH is not set
# CONFIG_HID_MAGICMOUSE is not set
# CONFIG_HID_MAYFLASH is not set
# CONFIG_HID_REDRAGON is not set
# CONFIG_HID_MICROSOFT is not set
# CONFIG_HID_MONTEREY is not set
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTI is not set
# CONFIG_HID_NTRIG is not set
# CONFIG_HID_ORTEK is not set
# CONFIG_HID_PANTHERLORD is not set
# CONFIG_HID_PENMOUNT is not set
# CONFIG_HID_PETALYNX is not set
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_PLANTRONICS is not set
# CONFIG_HID_PRIMAX is not set
# CONFIG_HID_RETRODE is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_SAITEK is not set
# CONFIG_HID_SAMSUNG is not set
# CONFIG_HID_SPEEDLINK is not set
# CONFIG_HID_STEAM is not set
# CONFIG_HID_STEELSERIES is not set
# CONFIG_HID_SUNPLUS is not set
# CONFIG_HID_RMI is not set
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
# CONFIG_HID_TIVO is not set
# CONFIG_HID_TOPSEED is not set
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_UDRAW_PS3 is not set
# CONFIG_HID_WACOM is not set
# CONFIG_HID_XINMO is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
# CONFIG_HID_SENSOR_HUB is not set
# CONFIG_HID_ALPS is not set

#
# USB HID support
#
CONFIG_USB_HID=y
# CONFIG_HID_PID is not set
# CONFIG_USB_HIDDEV is not set

#
# I2C HID support
#
# CONFIG_I2C_HID is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB=y
CONFIG_USB_PCI=y
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEFAULT_PERSIST=y
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_PCI=y
CONFIG_USB_EHCI_FSL=y
CONFIG_USB_EHCI_HCD_PPC_OF=y
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_FOTG210_HCD is not set
# CONFIG_USB_MAX3421_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
# CONFIG_USB_UHCI_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HCD_TEST_MODE is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
# CONFIG_USBIP_CORE is not set
# CONFIG_USB_MUSB_HDRC is not set
# CONFIG_USB_DWC3 is not set
# CONFIG_USB_DWC2 is not set
# CONFIG_USB_CHIPIDEA is not set
# CONFIG_USB_ISP1760 is not set

#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_EHSET_TEST_FIXTURE is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_EZUSB_FX2 is not set
# CONFIG_USB_HUB_USB251XB is not set
# CONFIG_USB_HSIC_USB3503 is not set
# CONFIG_USB_HSIC_USB4604 is not set
# CONFIG_USB_LINK_LAYER_TEST is not set
# CONFIG_USB_CHAOSKEY is not set

#
# USB Physical Layer drivers
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_USB_ISP1301 is not set
# CONFIG_USB_GADGET is not set
# CONFIG_TYPEC is not set
# CONFIG_USB_ROLE_SWITCH is not set
# CONFIG_USB_ULPI_BUS is not set
# CONFIG_UWB is not set
CONFIG_MMC=y
CONFIG_PWRSEQ_EMMC=y
CONFIG_PWRSEQ_SIMPLE=y
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_MINORS=8
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_IO_ACCESSORS=y
# CONFIG_MMC_SDHCI_PCI is not set
CONFIG_MMC_SDHCI_PLTFM=y
# CONFIG_MMC_SDHCI_OF_ARASAN is not set
# CONFIG_MMC_SDHCI_OF_AT91 is not set
CONFIG_MMC_SDHCI_OF_ESDHC=y
# CONFIG_MMC_SDHCI_OF_HLWD is not set
# CONFIG_MMC_SDHCI_OF_DWCMSHC is not set
# CONFIG_MMC_SDHCI_CADENCE is not set
# CONFIG_MMC_SDHCI_F_SDH30 is not set
# CONFIG_MMC_WBSD is not set
# CONFIG_MMC_TIFM_SD is not set
# CONFIG_MMC_SPI is not set
# CONFIG_MMC_CB710 is not set
# CONFIG_MMC_VIA_SDMMC is not set
# CONFIG_MMC_VUB300 is not set
# CONFIG_MMC_USHC is not set
# CONFIG_MMC_USDHI6ROL0 is not set
# CONFIG_MMC_CQHCI is not set
# CONFIG_MMC_TOSHIBA_PCI is not set
# CONFIG_MMC_MTK is not set
# CONFIG_MMC_SDHCI_XENON is not set
# CONFIG_MMC_SDHCI_OMAP is not set
# CONFIG_MMC_SDHCI_AM654 is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EDAC=y
CONFIG_EDAC_LEGACY_SYSFS=y
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_MPC85XX=y
# CONFIG_EDAC_CPC925 is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_MC146818_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_SYSTOHC=y
CONFIG_RTC_SYSTOHC_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set
CONFIG_RTC_NVMEM=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_ABB5ZES3 is not set
# CONFIG_RTC_DRV_ABX80X is not set
CONFIG_RTC_DRV_DS1307=y
# CONFIG_RTC_DRV_DS1307_CENTURY is not set
CONFIG_RTC_DRV_DS1374=y
# CONFIG_RTC_DRV_DS1374_WDT is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_HYM8563 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_ISL12026 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8523 is not set
# CONFIG_RTC_DRV_PCF85063 is not set
# CONFIG_RTC_DRV_PCF85363 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8010 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV8803 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T93 is not set
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1302 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1343 is not set
# CONFIG_RTC_DRV_DS1347 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6916 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RX4581 is not set
# CONFIG_RTC_DRV_RX6110 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_PCF2123 is not set
# CONFIG_RTC_DRV_MCP795 is not set
CONFIG_RTC_I2C_AND_SPI=y

#
# SPI and I2C RTC drivers
#
CONFIG_RTC_DRV_DS3232=y
CONFIG_RTC_DRV_DS3232_HWMON=y
# CONFIG_RTC_DRV_PCF2127 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1685_FAMILY is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_DS2404 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set
# CONFIG_RTC_DRV_ZYNQMP is not set

#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_GENERIC is not set
# CONFIG_RTC_DRV_FTRTC010 is not set
# CONFIG_RTC_DRV_SNVS is not set
# CONFIG_RTC_DRV_R7301 is not set

#
# HID Sensor RTC drivers
#
# CONFIG_RTC_DRV_HID_SENSOR_TIME is not set
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
CONFIG_DMA_ENGINE=y
CONFIG_DMA_OF=y
# CONFIG_ALTERA_MSGDMA is not set
# CONFIG_DW_AXI_DMAC is not set
# CONFIG_FSL_DMA is not set
# CONFIG_FSL_EDMA is not set
# CONFIG_FSL_RAID is not set
# CONFIG_INTEL_IDMA64 is not set
# CONFIG_QCOM_HIDMA_MGMT is not set
# CONFIG_QCOM_HIDMA is not set
# CONFIG_DW_DMAC is not set
# CONFIG_DW_DMAC_PCI is not set

#
# DMA Clients
#
# CONFIG_ASYNC_TX_DMA is not set
# CONFIG_DMATEST is not set

#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# CONFIG_AUXDISPLAY is not set
CONFIG_UIO=y
# CONFIG_UIO_CIF is not set
# CONFIG_UIO_PDRV_GENIRQ is not set
# CONFIG_UIO_DMEM_GENIRQ is not set
# CONFIG_UIO_AEC is not set
# CONFIG_UIO_SERCOS3 is not set
# CONFIG_UIO_PCI_GENERIC is not set
# CONFIG_UIO_NETX is not set
# CONFIG_UIO_FSL_ELBC_GPCM is not set
# CONFIG_UIO_PRUSS is not set
# CONFIG_UIO_MF624 is not set
# CONFIG_VFIO is not set
CONFIG_IRQ_BYPASS_MANAGER=y
CONFIG_VIRT_DRIVERS=y
CONFIG_FSL_HV_MANAGER=y
CONFIG_VIRTIO_MENU=y
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_MMIO is not set

#
# Microsoft Hyper-V guest support
#
CONFIG_STAGING=y
# CONFIG_COMEDI is not set
# CONFIG_RTL8192U is not set
# CONFIG_RTLLIB is not set
# CONFIG_R8712U is not set
# CONFIG_RTS5208 is not set

#
# Speakup console speech
#
# CONFIG_SPEAKUP is not set
# CONFIG_STAGING_MEDIA is not set

#
# Android
#
# CONFIG_STAGING_BOARD is not set
# CONFIG_LTE_GDM724X is not set
# CONFIG_GS_FPGABOOT is not set
# CONFIG_UNISYSSPAR is not set
# CONFIG_COMMON_CLK_XLNX_CLKWZRD is not set
# CONFIG_MOST is not set
# CONFIG_KS7010 is not set
# CONFIG_GREYBUS is not set
# CONFIG_PI433 is not set
# CONFIG_MTK_MMC is not set

#
# Gasket devices
#
# CONFIG_XIL_AXIS_FIFO is not set
# CONFIG_EROFS_FS is not set
CONFIG_CLKDEV_LOOKUP=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y

#
# Common Clock Framework
#
# CONFIG_CLK_HSDK is not set
# CONFIG_COMMON_CLK_MAX9485 is not set
# CONFIG_COMMON_CLK_SI5351 is not set
# CONFIG_COMMON_CLK_SI514 is not set
# CONFIG_COMMON_CLK_SI544 is not set
# CONFIG_COMMON_CLK_SI570 is not set
# CONFIG_COMMON_CLK_CDCE706 is not set
# CONFIG_COMMON_CLK_CDCE925 is not set
# CONFIG_COMMON_CLK_CS2000_CP is not set
CONFIG_CLK_QORIQ=y
# CONFIG_COMMON_CLK_VC5 is not set
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
# CONFIG_MAILBOX is not set
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y

#
# Generic IOMMU Pagetable Support
#
# CONFIG_IOMMU_DEBUGFS is not set
# CONFIG_IOMMU_DEFAULT_PASSTHROUGH is not set
CONFIG_OF_IOMMU=y
CONFIG_FSL_PAMU=y

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set

#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#

#
# Broadcom SoC drivers
#

#
# NXP/Freescale QorIQ SoC drivers
#
# CONFIG_FSL_DPAA is not set
CONFIG_FSL_GUTS=y

#
# i.MX SoC drivers
#

#
# Qualcomm SoC drivers
#
# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# CONFIG_XILINX_VCU is not set
# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
CONFIG_MEMORY=y
# CONFIG_FSL_CORENET_CF is not set
CONFIG_FSL_IFC=y
# CONFIG_IIO is not set
# CONFIG_NTB is not set
# CONFIG_VME_BUS is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
CONFIG_IRQCHIP=y
CONFIG_ARM_GIC_MAX_NR=1
# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set
# CONFIG_FMC is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_CADENCE_DP is not set
# CONFIG_PHY_FSL_IMX8MQ_USB is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# CONFIG_PHY_MAPPHONE_MDM6600 is not set
# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set

#
# Performance monitor support
#
CONFIG_RAS=y

#
# Android
#
# CONFIG_ANDROID is not set
# CONFIG_LIBNVDIMM is not set
# CONFIG_DAX is not set
CONFIG_NVMEM=y

#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# CONFIG_FPGA is not set
# CONFIG_FSI is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set

#
# File systems
#
CONFIG_FS_IOMAP=y
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_POSIX_ACL is not set
# CONFIG_EXT3_FS_SECURITY is not set
CONFIG_EXT4_FS=y
# CONFIG_EXT4_FS_POSIX_ACL is not set
# CONFIG_EXT4_FS_SECURITY is not set
# CONFIG_EXT4_ENCRYPTION is not set
# CONFIG_EXT4_DEBUG is not set
CONFIG_JBD2=y
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_F2FS_FS is not set
# CONFIG_FS_DAX is not set
CONFIG_EXPORTFS=m
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
CONFIG_MANDATORY_FILE_LOCKING=y
# CONFIG_FS_ENCRYPTION is not set
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_FAT_DEFAULT_UTF8 is not set
CONFIG_NTFS_FS=y
# CONFIG_NTFS_DEBUG is not set
# CONFIG_NTFS_RW is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_PROC_CHILDREN is not set
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_MEMFD_CREATE=y
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ORANGEFS_FS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_FS_WRITEBUFFER=y
# CONFIG_JFFS2_FS_WBUF_VERIFY is not set
# CONFIG_JFFS2_SUMMARY is not set
# CONFIG_JFFS2_FS_XATTR is not set
# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
CONFIG_JFFS2_ZLIB=y
CONFIG_JFFS2_RTIME=y
CONFIG_CRAMFS=y
CONFIG_CRAMFS_BLOCKDEV=y
# CONFIG_CRAMFS_MTD is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX6FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_PSTORE is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V2=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
CONFIG_NFS_V4=y
# CONFIG_NFS_SWAP is not set
# CONFIG_NFS_V4_1 is not set
CONFIG_ROOT_NFS=y
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFSD=m
# CONFIG_NFSD_V3 is not set
# CONFIG_NFSD_V4 is not set
CONFIG_GRACE_PERIOD=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
# CONFIG_SUNRPC_DEBUG is not set
# CONFIG_CEPH_FS is not set
# CONFIG_CIFS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=y
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_MAC_ROMAN is not set
# CONFIG_NLS_MAC_CELTIC is not set
# CONFIG_NLS_MAC_CENTEURO is not set
# CONFIG_NLS_MAC_CROATIAN is not set
# CONFIG_NLS_MAC_CYRILLIC is not set
# CONFIG_NLS_MAC_GAELIC is not set
# CONFIG_NLS_MAC_GREEK is not set
# CONFIG_NLS_MAC_ICELAND is not set
# CONFIG_NLS_MAC_INUIT is not set
# CONFIG_NLS_MAC_ROMANIAN is not set
# CONFIG_NLS_MAC_TURKISH is not set
CONFIG_NLS_UTF8=m

#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_COMPAT=y
# CONFIG_PERSISTENT_KEYRINGS is not set
# CONFIG_BIG_KEYS is not set
# CONFIG_ENCRYPTED_KEYS is not set
# CONFIG_KEY_DH_OPERATIONS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_RNG_DEFAULT=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_AKCIPHER=y
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_RSA=y
# CONFIG_CRYPTO_DH is not set
# CONFIG_CRYPTO_ECDH is not set
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_USER is not set
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=y
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_CHACHA20POLY1305 is not set
# CONFIG_CRYPTO_AEGIS128 is not set
# CONFIG_CRYPTO_AEGIS128L is not set
# CONFIG_CRYPTO_AEGIS256 is not set
# CONFIG_CRYPTO_MORUS640 is not set
# CONFIG_CRYPTO_MORUS1280 is not set
# CONFIG_CRYPTO_SEQIV is not set
CONFIG_CRYPTO_ECHAINIV=y

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CFB is not set
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_OFB is not set
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_XTS is not set
# CONFIG_CRYPTO_KEYWRAP is not set
# CONFIG_CRYPTO_ADIANTUM is not set

#
# Hash modes
#
# CONFIG_CRYPTO_CMAC is not set
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
# CONFIG_CRYPTO_CRC32C_VPMSUM is not set
# CONFIG_CRYPTO_CRC32 is not set
# CONFIG_CRYPTO_CRCT10DIF is not set
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_POLY1305 is not set
CONFIG_CRYPTO_MD4=y
CONFIG_CRYPTO_MD5=y
# CONFIG_CRYPTO_MD5_PPC is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=y
# CONFIG_CRYPTO_SHA1_PPC is not set
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
# CONFIG_CRYPTO_SHA3 is not set
# CONFIG_CRYPTO_SM3 is not set
# CONFIG_CRYPTO_STREEBOG is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_TI is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_CHACHA20 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_SM4 is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
# CONFIG_CRYPTO_LZO is not set
# CONFIG_CRYPTO_842 is not set
# CONFIG_CRYPTO_LZ4 is not set
# CONFIG_CRYPTO_LZ4HC is not set
# CONFIG_CRYPTO_ZSTD is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRYPTO_DRBG_MENU=y
CONFIG_CRYPTO_DRBG_HMAC=y
# CONFIG_CRYPTO_DRBG_HASH is not set
CONFIG_CRYPTO_DRBG=y
CONFIG_CRYPTO_JITTERENTROPY=y
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
# CONFIG_CRYPTO_USER_API_RNG is not set
# CONFIG_CRYPTO_USER_API_AEAD is not set
CONFIG_CRYPTO_HW=y
CONFIG_CRYPTO_DEV_FSL_CAAM_COMMON=y
CONFIG_CRYPTO_DEV_FSL_CAAM=y
# CONFIG_CRYPTO_DEV_FSL_CAAM_DEBUG is not set
CONFIG_CRYPTO_DEV_FSL_CAAM_JR=y
CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE=9
# CONFIG_CRYPTO_DEV_FSL_CAAM_INTC is not set
CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC=y
CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC=y
# CONFIG_CRYPTO_DEV_TALITOS is not set
# CONFIG_CRYPTO_DEV_NX is not set
# CONFIG_CRYPTO_DEV_NITROX_CNN55XX is not set
# CONFIG_CRYPTO_DEV_CCREE is not set
# CONFIG_ASYMMETRIC_KEY_TYPE is not set

#
# Certificates for signature checking
#
# CONFIG_SYSTEM_BLACKLIST_KEYRING is not set
CONFIG_BINARY_PRINTF=y

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_RATIONAL=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GENERIC_NET_UTILS=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
# CONFIG_CRC_CCITT is not set
CONFIG_CRC16=y
# CONFIG_CRC_T10DIF is not set
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=y
# CONFIG_CRC8 is not set
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_ASSOCIATIVE_ARRAY=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_ARCH_HAS_DMA_SET_MASK=y
CONFIG_SWIOTLB=y
CONFIG_SGL_ALLOC=y
CONFIG_IOMMU_HELPER=y
CONFIG_CPU_RMAP=y
CONFIG_DQL=y
CONFIG_GLOB=y
# CONFIG_GLOB_SELFTEST is not set
CONFIG_NLATTR=y
CONFIG_CLZ_TAB=y
# CONFIG_CORDIC is not set
# CONFIG_DDR is not set
# CONFIG_IRQ_POLL is not set
CONFIG_MPILIB=y
CONFIG_LIBFDT=y
CONFIG_OID_REGISTRY=y
CONFIG_SG_POOL=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_STACKDEPOT=y
CONFIG_SBITMAP=y
# CONFIG_STRING_SELFTEST is not set

#
# Kernel hacking
#

#
# printk and dmesg options
#
# CONFIG_PRINTK_TIME is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_DYNAMIC_DEBUG is not set

#
# Compile-time checks and compiler options
#
# CONFIG_DEBUG_INFO is not set
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=2048
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_READABLE_ASM is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_PAGE_OWNER is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
CONFIG_MAGIC_SYSRQ_SERIAL=y
CONFIG_DEBUG_KERNEL=y

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_PAGE_REF is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_DEBUG_SLAB is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_VM is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_KASAN=y
CONFIG_KASAN_GENERIC=y
# CONFIG_KASAN_EXTRA is not set
CONFIG_KASAN_OUTLINE=y
# CONFIG_KASAN_INLINE is not set
CONFIG_TEST_KASAN=m
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
CONFIG_DEBUG_SHIRQ=y

#
# Debug Lockups and Hangs
#
# CONFIG_SOFTLOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
# CONFIG_WQ_WATCHDOG is not set
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_PI_LIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set

#
# RCU Debugging
#
# CONFIG_RCU_PERF_TEST is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=21
CONFIG_RCU_TRACE=y
# CONFIG_RCU_EQS_DEBUG is not set
# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
CONFIG_FUNCTION_ERROR_INJECTION=y
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_TRACE_CLOCK=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_FUNCTION_TRACER is not set
# CONFIG_PREEMPTIRQ_EVENTS is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_HWLAT_TRACER is not set
# CONFIG_ENABLE_DEFAULT_TRACERS is not set
# CONFIG_FTRACE_SYSCALLS is not set
# CONFIG_TRACER_SNAPSHOT is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
CONFIG_KPROBE_EVENTS=y
CONFIG_UPROBE_EVENTS=y
CONFIG_DYNAMIC_EVENTS=y
CONFIG_PROBE_EVENTS=y
# CONFIG_HIST_TRIGGERS is not set
# CONFIG_TRACEPOINT_BENCHMARK is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
# CONFIG_RING_BUFFER_STARTUP_TEST is not set
# CONFIG_PREEMPTIRQ_DELAY_TEST is not set
# CONFIG_TRACE_EVAL_MAP_FILE is not set
CONFIG_TRACING_EVENTS_GPIO=y
# CONFIG_DMA_API_DEBUG is not set
CONFIG_RUNTIME_TESTING_MENU=y
# CONFIG_LKDTM is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_TEST_SORT is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_RBTREE_TEST is not set
# CONFIG_INTERVAL_TREE_TEST is not set
# CONFIG_PERCPU_TEST is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_TEST_HEXDUMP is not set
# CONFIG_TEST_STRING_HELPERS is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_TEST_PRINTF is not set
# CONFIG_TEST_BITMAP is not set
# CONFIG_TEST_BITFIELD is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_XARRAY is not set
# CONFIG_TEST_OVERFLOW is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_HASH is not set
# CONFIG_TEST_IDA is not set
# CONFIG_TEST_LKM is not set
# CONFIG_TEST_USER_COPY is not set
# CONFIG_TEST_BPF is not set
# CONFIG_FIND_BIT_BENCHMARK is not set
# CONFIG_TEST_FIRMWARE is not set
# CONFIG_TEST_SYSCTL is not set
# CONFIG_TEST_UDELAY is not set
# CONFIG_TEST_STATIC_KEYS is not set
# CONFIG_TEST_KMOD is not set
# CONFIG_TEST_MEMCAT_P is not set
# CONFIG_MEMTEST is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
# CONFIG_UBSAN is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
CONFIG_STRICT_DEVMEM=y
# CONFIG_IO_STRICT_DEVMEM is not set
# CONFIG_PPC_DISABLE_WERROR is not set
CONFIG_PPC_WERROR=y
CONFIG_PRINT_STACK_DEPTH=64
# CONFIG_PPC_EMULATED_STATS is not set
# CONFIG_CODE_PATCHING_SELFTEST is not set
CONFIG_JUMP_LABEL_FEATURE_CHECKS=y
# CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG is not set
# CONFIG_FTR_FIXUP_SELFTEST is not set
# CONFIG_MSI_BITMAP_SELFTEST is not set
# CONFIG_PPC_IRQ_SOFT_MASK_DEBUG is not set
# CONFIG_XMON is not set
CONFIG_PPC_EARLY_DEBUG=y
CONFIG_PPC_EARLY_DEBUG_MEMCONS=y
CONFIG_PPC_MEMCONS_OUTPUT_SIZE=4096
CONFIG_PPC_MEMCONS_INPUT_SIZE=128
CONFIG_PPC_PTDUMP=y

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Daniel Axtens]

[-- Attachment #1: Type: text/plain, Size: 1744 bytes --]

Christophe Leroy <christophe.leroy@c-s.fr> writes:

> Le 04/03/2019 à 06:26, Daniel Axtens a écrit :
>> Hi Christophe,
>>> diff --git a/arch/powerpc/include/asm/kasan.h b/arch/powerpc/include/asm/kasan.h
>>> new file mode 100644
>>> index 000000000000..c3161b8fc017
>>> --- /dev/null
>>> +++ b/arch/powerpc/include/asm/kasan.h
>>> @@ -0,0 +1,15 @@
>>> +/* SPDX-License-Identifier: GPL-2.0 */
>>> +#ifndef __ASM_KASAN_H
>>> +#define __ASM_KASAN_H
>>> +
>>> +#ifdef CONFIG_KASAN
>>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
>> 
>> I'm having some trouble with this. I get warnings like this:
>
> I don't have such problem, neither with ppc32 nor with ppc64e_defconfig.
>

Fascinating, I'll dig into that more.

> What config are you using ?

Attached, it's based on the one provided with the SDK for the T4240RDB.

> Another (unrelated) question I have:
> On the initial arm64 implementation (39d114ddc682 arm64: add KASAN 
> support) they made KASAN implementation depend on SPARSEMEM_VMEMMAP 
> (allthough they later removed that dependency with commit e17d8025f07e 
> arm64/mm/kasan: don't use vmemmap_populate() to initialize shadow)
>
> So I'm wondering why on your side, KASAN depends on !SPARSEMEM_VMEMMAP

I use the vmemmap area as the shadow region for kasan, in a way that
takes absolutely no account of any other use. It's very possible that I
could instead do something similar to what arm64 used to do - I think
one of the previous ppc64 approaches did something similar too.

Regards,
Daniel


[-- Attachment #2: .config --]
[-- Type: application/octet-stream, Size: 86167 bytes --]

#
# Automatically generated file; DO NOT EDIT.
# Linux/powerpc 5.0.0-rc2 Kernel Configuration
#

#
# Compiler: powerpc64-linux-gnu-gcc (Ubuntu 8.2.0-7ubuntu1) 8.2.0
#
CONFIG_CC_IS_GCC=y
CONFIG_GCC_VERSION=80200
CONFIG_CLANG_VERSION=0
CONFIG_CC_HAS_ASM_GOTO=y
CONFIG_CONSTRUCTORS=y
CONFIG_IRQ_WORK=y
CONFIG_BUILDTIME_EXTABLE_SORT=y
CONFIG_THREAD_INFO_IN_TASK=y

#
# General setup
#
CONFIG_INIT_ENV_ARG_LIMIT=32
# CONFIG_COMPILE_TEST is not set
CONFIG_LOCALVERSION=""
CONFIG_LOCALVERSION_AUTO=y
CONFIG_BUILD_SALT=""
CONFIG_HAVE_KERNEL_GZIP=y
CONFIG_KERNEL_GZIP=y
CONFIG_DEFAULT_HOSTNAME="(none)"
CONFIG_SWAP=y
CONFIG_SYSVIPC=y
CONFIG_SYSVIPC_SYSCTL=y
CONFIG_POSIX_MQUEUE=y
CONFIG_POSIX_MQUEUE_SYSCTL=y
CONFIG_CROSS_MEMORY_ATTACH=y
CONFIG_USELIB=y
CONFIG_AUDIT=y
CONFIG_HAVE_ARCH_AUDITSYSCALL=y
CONFIG_AUDITSYSCALL=y

#
# IRQ subsystem
#
CONFIG_GENERIC_IRQ_SHOW=y
CONFIG_GENERIC_IRQ_SHOW_LEVEL=y
CONFIG_GENERIC_IRQ_MIGRATION=y
CONFIG_IRQ_DOMAIN=y
CONFIG_GENERIC_MSI_IRQ=y
CONFIG_IRQ_FORCED_THREADING=y
CONFIG_SPARSE_IRQ=y
# CONFIG_GENERIC_IRQ_DEBUGFS is not set
CONFIG_GENERIC_TIME_VSYSCALL=y
CONFIG_GENERIC_CLOCKEVENTS=y
CONFIG_ARCH_HAS_TICK_BROADCAST=y
CONFIG_GENERIC_CLOCKEVENTS_BROADCAST=y
CONFIG_GENERIC_CMOS_UPDATE=y

#
# Timers subsystem
#
CONFIG_TICK_ONESHOT=y
CONFIG_NO_HZ_COMMON=y
# CONFIG_HZ_PERIODIC is not set
CONFIG_NO_HZ_IDLE=y
# CONFIG_NO_HZ_FULL is not set
CONFIG_NO_HZ=y
CONFIG_HIGH_RES_TIMERS=y
CONFIG_PREEMPT_NONE=y
# CONFIG_PREEMPT_VOLUNTARY is not set
# CONFIG_PREEMPT is not set

#
# CPU/Task time and stats accounting
#
CONFIG_VIRT_CPU_ACCOUNTING=y
# CONFIG_TICK_CPU_ACCOUNTING is not set
CONFIG_VIRT_CPU_ACCOUNTING_NATIVE=y
# CONFIG_VIRT_CPU_ACCOUNTING_GEN is not set
CONFIG_BSD_PROCESS_ACCT=y
# CONFIG_BSD_PROCESS_ACCT_V3 is not set
# CONFIG_TASKSTATS is not set
# CONFIG_PSI is not set
CONFIG_CPU_ISOLATION=y

#
# RCU Subsystem
#
CONFIG_TREE_RCU=y
# CONFIG_RCU_EXPERT is not set
CONFIG_SRCU=y
CONFIG_TREE_SRCU=y
CONFIG_RCU_STALL_COMMON=y
CONFIG_RCU_NEED_SEGCBLIST=y
CONFIG_BUILD_BIN2C=y
CONFIG_IKCONFIG=y
CONFIG_IKCONFIG_PROC=y
CONFIG_LOG_BUF_SHIFT=17
CONFIG_LOG_CPU_MAX_BUF_SHIFT=14
CONFIG_PRINTK_SAFE_LOG_BUF_SHIFT=14
CONFIG_CGROUPS=y
CONFIG_PAGE_COUNTER=y
CONFIG_MEMCG=y
# CONFIG_MEMCG_SWAP is not set
CONFIG_MEMCG_KMEM=y
CONFIG_BLK_CGROUP=y
# CONFIG_DEBUG_BLK_CGROUP is not set
CONFIG_CGROUP_WRITEBACK=y
CONFIG_CGROUP_SCHED=y
CONFIG_FAIR_GROUP_SCHED=y
CONFIG_CFS_BANDWIDTH=y
# CONFIG_RT_GROUP_SCHED is not set
CONFIG_CGROUP_PIDS=y
# CONFIG_CGROUP_RDMA is not set
# CONFIG_CGROUP_FREEZER is not set
# CONFIG_CGROUP_HUGETLB is not set
# CONFIG_CPUSETS is not set
# CONFIG_CGROUP_DEVICE is not set
CONFIG_CGROUP_CPUACCT=y
CONFIG_CGROUP_PERF=y
# CONFIG_CGROUP_DEBUG is not set
CONFIG_NAMESPACES=y
CONFIG_UTS_NS=y
CONFIG_IPC_NS=y
# CONFIG_USER_NS is not set
CONFIG_PID_NS=y
CONFIG_NET_NS=y
# CONFIG_CHECKPOINT_RESTORE is not set
# CONFIG_SCHED_AUTOGROUP is not set
# CONFIG_SYSFS_DEPRECATED is not set
# CONFIG_RELAY is not set
CONFIG_BLK_DEV_INITRD=y
CONFIG_INITRAMFS_SOURCE=""
CONFIG_RD_GZIP=y
CONFIG_RD_BZIP2=y
CONFIG_RD_LZMA=y
CONFIG_RD_XZ=y
CONFIG_RD_LZO=y
CONFIG_RD_LZ4=y
CONFIG_CC_OPTIMIZE_FOR_PERFORMANCE=y
# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set
CONFIG_HAVE_LD_DEAD_CODE_DATA_ELIMINATION=y
# CONFIG_LD_DEAD_CODE_DATA_ELIMINATION is not set
CONFIG_SYSCTL=y
CONFIG_ANON_INODES=y
CONFIG_SYSCTL_EXCEPTION_TRACE=y
CONFIG_BPF=y
CONFIG_EXPERT=y
CONFIG_MULTIUSER=y
CONFIG_SGETMASK_SYSCALL=y
CONFIG_SYSFS_SYSCALL=y
# CONFIG_SYSCTL_SYSCALL is not set
# CONFIG_FHANDLE is not set
CONFIG_POSIX_TIMERS=y
CONFIG_PRINTK=y
CONFIG_PRINTK_NMI=y
CONFIG_BUG=y
CONFIG_ELF_CORE=y
CONFIG_BASE_FULL=y
CONFIG_FUTEX=y
CONFIG_FUTEX_PI=y
CONFIG_EPOLL=y
CONFIG_SIGNALFD=y
CONFIG_TIMERFD=y
CONFIG_EVENTFD=y
CONFIG_SHMEM=y
CONFIG_AIO=y
CONFIG_ADVISE_SYSCALLS=y
CONFIG_MEMBARRIER=y
CONFIG_KALLSYMS=y
CONFIG_KALLSYMS_ALL=y
CONFIG_KALLSYMS_BASE_RELATIVE=y
# CONFIG_BPF_SYSCALL is not set
# CONFIG_USERFAULTFD is not set
CONFIG_ARCH_HAS_MEMBARRIER_CALLBACKS=y
CONFIG_RSEQ=y
# CONFIG_DEBUG_RSEQ is not set
CONFIG_EMBEDDED=y
CONFIG_HAVE_PERF_EVENTS=y
# CONFIG_PC104 is not set

#
# Kernel Performance Events And Counters
#
CONFIG_PERF_EVENTS=y
CONFIG_VM_EVENT_COUNTERS=y
# CONFIG_COMPAT_BRK is not set
CONFIG_SLAB=y
# CONFIG_SLUB is not set
# CONFIG_SLOB is not set
CONFIG_SLAB_MERGE_DEFAULT=y
# CONFIG_SLAB_FREELIST_RANDOM is not set
# CONFIG_PROFILING is not set
CONFIG_TRACEPOINTS=y
CONFIG_PPC64=y

#
# Processor support
#
# CONFIG_PPC_BOOK3S_64 is not set
CONFIG_PPC_BOOK3E_64=y
# CONFIG_GENERIC_CPU is not set
# CONFIG_E5500_CPU is not set
CONFIG_E6500_CPU=y
CONFIG_TARGET_CPU_BOOL=y
CONFIG_PPC_BOOK3E=y
CONFIG_E500=y
CONFIG_PPC_E500MC=y
CONFIG_PPC_FPU=y
CONFIG_FSL_EMB_PERFMON=y
CONFIG_FSL_EMB_PERF_EVENT=y
CONFIG_FSL_EMB_PERF_EVENT_E500=y
CONFIG_BOOKE=y
CONFIG_PPC_FSL_BOOK3E=y
CONFIG_PTE_64BIT=y
CONFIG_PHYS_64BIT=y
CONFIG_ALTIVEC=y
CONFIG_PPC_MMU_NOHASH=y
CONFIG_PPC_BOOK3E_MMU=y
CONFIG_SMP=y
CONFIG_NR_CPUS=24
CONFIG_PPC_DOORBELL=y
CONFIG_VDSO32=y
CONFIG_CPU_BIG_ENDIAN=y
CONFIG_64BIT=y
CONFIG_MMU=y
CONFIG_ARCH_MMAP_RND_BITS_MAX=32
CONFIG_ARCH_MMAP_RND_BITS_MIN=18
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MAX=17
CONFIG_ARCH_MMAP_RND_COMPAT_BITS_MIN=11
CONFIG_HAVE_SETUP_PER_CPU_AREA=y
CONFIG_NEED_PER_CPU_EMBED_FIRST_CHUNK=y
CONFIG_NR_IRQS=512
CONFIG_STACKTRACE_SUPPORT=y
CONFIG_TRACE_IRQFLAGS_SUPPORT=y
CONFIG_LOCKDEP_SUPPORT=y
CONFIG_RWSEM_XCHGADD_ALGORITHM=y
CONFIG_GENERIC_HWEIGHT=y
CONFIG_PPC=y
CONFIG_PPC_BARRIER_NOSPEC=y
CONFIG_EARLY_PRINTK=y
CONFIG_PANIC_TIMEOUT=180
CONFIG_COMPAT=y
CONFIG_SYSVIPC_COMPAT=y
CONFIG_SCHED_OMIT_FRAME_POINTER=y
CONFIG_ARCH_MAY_HAVE_PC_FDC=y
CONFIG_PPC_UDBG_16550=y
CONFIG_AUDIT_ARCH=y
CONFIG_GENERIC_BUG=y
CONFIG_DEFAULT_UIMAGE=y
CONFIG_ARCH_HIBERNATION_POSSIBLE=y
CONFIG_ARCH_SUPPORTS_UPROBES=y
CONFIG_PPC_ADV_DEBUG_REGS=y
CONFIG_PPC_ADV_DEBUG_IACS=2
CONFIG_PPC_ADV_DEBUG_DACS=2
CONFIG_PPC_ADV_DEBUG_DVCS=0
CONFIG_ZONE_DMA=y
CONFIG_PGTABLE_LEVELS=4
CONFIG_PPC_MSI_BITMAP=y
CONFIG_FSL_CORENET_RCPM=y

#
# Platform support
#
CONFIG_FSL_SOC_BOOKE=y
# CONFIG_PPC_QEMU_E500 is not set
CONFIG_CORENET_GENERIC=y
# CONFIG_KVM_GUEST is not set
CONFIG_EPAPR_PARAVIRT=y
# CONFIG_PPC_OF_BOOT_TRAMPOLINE is not set
CONFIG_PPC_SMP_MUXED_IPI=y
CONFIG_MPIC=y
# CONFIG_MPIC_TIMER is not set
CONFIG_PPC_EPAPR_HV_PIC=y
# CONFIG_MPIC_MSGR is not set

#
# CPU Frequency scaling
#
# CONFIG_CPU_FREQ is not set

#
# CPUIdle driver
#

#
# CPU Idle
#
# CONFIG_CPU_IDLE is not set
# CONFIG_GEN_RTC is not set
# CONFIG_SIMPLE_GPIO is not set

#
# Kernel options
#
# CONFIG_HZ_100 is not set
CONFIG_HZ_250=y
# CONFIG_HZ_300 is not set
# CONFIG_HZ_1000 is not set
CONFIG_HZ=250
CONFIG_SCHED_HRTICK=y
CONFIG_HUGETLB_PAGE_SIZE_VARIABLE=y
CONFIG_MATH_EMULATION=y
# CONFIG_MATH_EMULATION_FULL is not set
CONFIG_MATH_EMULATION_HW_UNIMPLEMENTED=y
# CONFIG_LD_HEAD_STUB_CATCH is not set
# CONFIG_HOTPLUG_CPU is not set
CONFIG_ARCH_ENABLE_MEMORY_HOTPLUG=y
CONFIG_ARCH_ENABLE_MEMORY_HOTREMOVE=y
# CONFIG_KEXEC is not set
# CONFIG_KEXEC_FILE is not set
# CONFIG_RELOCATABLE is not set
# CONFIG_CRASH_DUMP is not set
CONFIG_IRQ_ALL_CPUS=y
# CONFIG_NUMA is not set
CONFIG_ARCH_SELECT_MEMORY_MODEL=y
CONFIG_ARCH_FLATMEM_ENABLE=y
CONFIG_ARCH_SPARSEMEM_ENABLE=y
CONFIG_SYS_SUPPORTS_HUGETLBFS=y
CONFIG_ILLEGAL_POINTER_VALUE=0x5deadbeef0000000
CONFIG_PPC_4K_PAGES=y
CONFIG_PPC_PAGE_SHIFT=12
CONFIG_THREAD_SHIFT=14
CONFIG_ETEXT_SHIFT=12
CONFIG_DATA_SHIFT=12
CONFIG_FORCE_MAX_ZONEORDER=13
# CONFIG_SCHED_SMT is not set
# CONFIG_CMDLINE_BOOL is not set
CONFIG_EXTRA_TARGETS=""
# CONFIG_HIBERNATION is not set
# CONFIG_PM is not set
CONFIG_SECCOMP=y
CONFIG_ISA_DMA_API=y

#
# Bus options
#
CONFIG_GENERIC_ISA_DMA=y
CONFIG_PPC_INDIRECT_PCI=y
CONFIG_FSL_SOC=y
CONFIG_FSL_PCI=y
CONFIG_FSL_LBC=y
CONFIG_PAGE_OFFSET=0xc000000000000000
CONFIG_KERNEL_START=0xc000000000000000
CONFIG_PHYSICAL_START=0x00000000
CONFIG_HAVE_KVM_EVENTFD=y
CONFIG_KVM_MMIO=y
CONFIG_KVM_VFIO=y
CONFIG_KVM_COMPAT=y
CONFIG_HAVE_KVM_IRQ_BYPASS=y
CONFIG_HAVE_KVM_VCPU_ASYNC_IOCTL=y
CONFIG_VIRTUALIZATION=y
CONFIG_KVM=y
CONFIG_KVM_BOOKE_HV=y
# CONFIG_KVM_EXIT_TIMING is not set
CONFIG_KVM_E500MC=y
# CONFIG_KVM_MPIC is not set
CONFIG_VHOST_NET=m
CONFIG_VHOST=m
# CONFIG_VHOST_CROSS_ENDIAN_LEGACY is not set

#
# General architecture-dependent options
#
CONFIG_CRASH_CORE=y
CONFIG_HAVE_OPROFILE=y
CONFIG_KPROBES=y
CONFIG_JUMP_LABEL=y
CONFIG_STATIC_KEYS_SELFTEST=y
CONFIG_OPTPROBES=y
CONFIG_UPROBES=y
CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y
CONFIG_ARCH_USE_BUILTIN_BSWAP=y
CONFIG_KRETPROBES=y
CONFIG_HAVE_IOREMAP_PROT=y
CONFIG_HAVE_KPROBES=y
CONFIG_HAVE_KRETPROBES=y
CONFIG_HAVE_OPTPROBES=y
CONFIG_HAVE_KPROBES_ON_FTRACE=y
CONFIG_HAVE_FUNCTION_ERROR_INJECTION=y
CONFIG_HAVE_NMI=y
CONFIG_HAVE_ARCH_TRACEHOOK=y
CONFIG_GENERIC_SMP_IDLE_THREAD=y
CONFIG_ARCH_HAS_FORTIFY_SOURCE=y
CONFIG_HAVE_REGS_AND_STACK_ACCESS_API=y
CONFIG_HAVE_RSEQ=y
CONFIG_HAVE_CLK=y
CONFIG_HAVE_PERF_EVENTS_NMI=y
CONFIG_HAVE_HARDLOCKUP_DETECTOR_PERF=y
CONFIG_HAVE_PERF_REGS=y
CONFIG_HAVE_PERF_USER_STACK_DUMP=y
CONFIG_HAVE_ARCH_JUMP_LABEL=y
CONFIG_HAVE_RCU_TABLE_FREE=y
CONFIG_ARCH_HAVE_NMI_SAFE_CMPXCHG=y
CONFIG_ARCH_WEAK_RELEASE_ACQUIRE=y
CONFIG_ARCH_WANT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_COMPAT_IPC_PARSE_VERSION=y
CONFIG_ARCH_WANT_OLD_COMPAT_IPC=y
CONFIG_HAVE_ARCH_SECCOMP_FILTER=y
CONFIG_SECCOMP_FILTER=y
CONFIG_HAVE_STACKPROTECTOR=y
CONFIG_CC_HAS_STACKPROTECTOR_NONE=y
CONFIG_STACKPROTECTOR=y
CONFIG_STACKPROTECTOR_STRONG=y
CONFIG_HAVE_CONTEXT_TRACKING=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING=y
CONFIG_ARCH_HAS_SCALED_CPUTIME=y
CONFIG_HAVE_VIRT_CPU_ACCOUNTING_GEN=y
CONFIG_HAVE_IRQ_TIME_ACCOUNTING=y
CONFIG_HAVE_MOD_ARCH_SPECIFIC=y
CONFIG_MODULES_USE_ELF_RELA=y
CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK=y
CONFIG_ARCH_HAS_ELF_RANDOMIZE=y
CONFIG_HAVE_ARCH_MMAP_RND_BITS=y
CONFIG_ARCH_MMAP_RND_BITS=18
CONFIG_HAVE_ARCH_MMAP_RND_COMPAT_BITS=y
CONFIG_ARCH_MMAP_RND_COMPAT_BITS=11
CONFIG_CLONE_BACKWARDS=y
CONFIG_OLD_SIGSUSPEND=y
CONFIG_COMPAT_OLD_SIGACTION=y
CONFIG_COMPAT_32BIT_TIME=y
CONFIG_ARCH_HAS_PHYS_TO_DMA=y
# CONFIG_REFCOUNT_FULL is not set

#
# GCOV-based kernel profiling
#
# CONFIG_GCOV_KERNEL is not set
CONFIG_ARCH_HAS_GCOV_PROFILE_ALL=y
CONFIG_PLUGIN_HOSTCC=""
CONFIG_HAVE_GCC_PLUGINS=y
CONFIG_RT_MUTEXES=y
CONFIG_BASE_SMALL=0
CONFIG_MODULES=y
# CONFIG_MODULE_FORCE_LOAD is not set
CONFIG_MODULE_UNLOAD=y
CONFIG_MODULE_FORCE_UNLOAD=y
CONFIG_MODVERSIONS=y
# CONFIG_MODULE_SRCVERSION_ALL is not set
# CONFIG_MODULE_SIG is not set
# CONFIG_MODULE_COMPRESS is not set
# CONFIG_TRIM_UNUSED_KSYMS is not set
CONFIG_MODULES_TREE_LOOKUP=y
CONFIG_BLOCK=y
CONFIG_BLK_SCSI_REQUEST=y
# CONFIG_BLK_DEV_BSG is not set
# CONFIG_BLK_DEV_BSGLIB is not set
# CONFIG_BLK_DEV_INTEGRITY is not set
# CONFIG_BLK_DEV_ZONED is not set
# CONFIG_BLK_DEV_THROTTLING is not set
# CONFIG_BLK_CMDLINE_PARSER is not set
# CONFIG_BLK_WBT is not set
# CONFIG_BLK_CGROUP_IOLATENCY is not set
CONFIG_BLK_DEBUG_FS=y
# CONFIG_BLK_SED_OPAL is not set

#
# Partition Types
#
CONFIG_PARTITION_ADVANCED=y
# CONFIG_ACORN_PARTITION is not set
# CONFIG_AIX_PARTITION is not set
# CONFIG_OSF_PARTITION is not set
# CONFIG_AMIGA_PARTITION is not set
# CONFIG_ATARI_PARTITION is not set
CONFIG_MAC_PARTITION=y
CONFIG_MSDOS_PARTITION=y
# CONFIG_BSD_DISKLABEL is not set
# CONFIG_MINIX_SUBPARTITION is not set
# CONFIG_SOLARIS_X86_PARTITION is not set
# CONFIG_UNIXWARE_DISKLABEL is not set
# CONFIG_LDM_PARTITION is not set
# CONFIG_SGI_PARTITION is not set
# CONFIG_ULTRIX_PARTITION is not set
# CONFIG_SUN_PARTITION is not set
# CONFIG_KARMA_PARTITION is not set
CONFIG_EFI_PARTITION=y
# CONFIG_SYSV68_PARTITION is not set
# CONFIG_CMDLINE_PARTITION is not set
CONFIG_BLOCK_COMPAT=y
CONFIG_BLK_MQ_PCI=y

#
# IO Schedulers
#
CONFIG_MQ_IOSCHED_DEADLINE=y
CONFIG_MQ_IOSCHED_KYBER=y
# CONFIG_IOSCHED_BFQ is not set
CONFIG_PREEMPT_NOTIFIERS=y
CONFIG_ASN1=y
CONFIG_INLINE_SPIN_UNLOCK_IRQ=y
CONFIG_INLINE_READ_UNLOCK=y
CONFIG_INLINE_READ_UNLOCK_IRQ=y
CONFIG_INLINE_WRITE_UNLOCK=y
CONFIG_INLINE_WRITE_UNLOCK_IRQ=y
CONFIG_ARCH_SUPPORTS_ATOMIC_RMW=y
CONFIG_MUTEX_SPIN_ON_OWNER=y
CONFIG_RWSEM_SPIN_ON_OWNER=y
CONFIG_LOCK_SPIN_ON_OWNER=y

#
# Executable file formats
#
CONFIG_BINFMT_ELF=y
CONFIG_COMPAT_BINFMT_ELF=y
CONFIG_ELFCORE=y
# CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
CONFIG_BINFMT_SCRIPT=y
CONFIG_BINFMT_MISC=m
CONFIG_COREDUMP=y

#
# Memory Management options
#
CONFIG_SELECT_MEMORY_MODEL=y
CONFIG_FLATMEM_MANUAL=y
# CONFIG_SPARSEMEM_MANUAL is not set
CONFIG_FLATMEM=y
CONFIG_FLAT_NODE_MEM_MAP=y
CONFIG_SPARSEMEM_VMEMMAP_ENABLE=y
CONFIG_HAVE_MEMBLOCK_NODE_MAP=y
CONFIG_HAVE_GENERIC_GUP=y
CONFIG_SPLIT_PTLOCK_CPUS=4
CONFIG_COMPACTION=y
CONFIG_MIGRATION=y
CONFIG_PHYS_ADDR_T_64BIT=y
CONFIG_BOUNCE=y
CONFIG_MMU_NOTIFIER=y
# CONFIG_KSM is not set
CONFIG_DEFAULT_MMAP_MIN_ADDR=4096
# CONFIG_CLEANCACHE is not set
# CONFIG_FRONTSWAP is not set
# CONFIG_CMA is not set
# CONFIG_ZPOOL is not set
# CONFIG_ZBUD is not set
# CONFIG_ZSMALLOC is not set
# CONFIG_IDLE_PAGE_TRACKING is not set
# CONFIG_PERCPU_STATS is not set
# CONFIG_GUP_BENCHMARK is not set
CONFIG_ARCH_HAS_PTE_SPECIAL=y
CONFIG_NET=y
CONFIG_SKB_EXTENSIONS=y

#
# Networking options
#
CONFIG_PACKET=y
# CONFIG_PACKET_DIAG is not set
CONFIG_UNIX=y
# CONFIG_UNIX_DIAG is not set
# CONFIG_TLS is not set
CONFIG_XFRM=y
CONFIG_XFRM_ALGO=y
CONFIG_XFRM_USER=y
# CONFIG_XFRM_INTERFACE is not set
CONFIG_XFRM_SUB_POLICY=y
CONFIG_XFRM_MIGRATE=y
CONFIG_XFRM_STATISTICS=y
CONFIG_XFRM_IPCOMP=y
CONFIG_NET_KEY=y
CONFIG_NET_KEY_MIGRATE=y
CONFIG_INET=y
CONFIG_IP_MULTICAST=y
CONFIG_IP_ADVANCED_ROUTER=y
# CONFIG_IP_FIB_TRIE_STATS is not set
CONFIG_IP_MULTIPLE_TABLES=y
CONFIG_IP_ROUTE_MULTIPATH=y
CONFIG_IP_ROUTE_VERBOSE=y
CONFIG_IP_PNP=y
CONFIG_IP_PNP_DHCP=y
CONFIG_IP_PNP_BOOTP=y
CONFIG_IP_PNP_RARP=y
CONFIG_NET_IPIP=y
# CONFIG_NET_IPGRE_DEMUX is not set
CONFIG_NET_IP_TUNNEL=y
CONFIG_IP_MROUTE_COMMON=y
CONFIG_IP_MROUTE=y
# CONFIG_IP_MROUTE_MULTIPLE_TABLES is not set
CONFIG_IP_PIMSM_V1=y
CONFIG_IP_PIMSM_V2=y
# CONFIG_SYN_COOKIES is not set
# CONFIG_NET_IPVTI is not set
# CONFIG_NET_FOU is not set
# CONFIG_NET_FOU_IP_TUNNELS is not set
CONFIG_INET_AH=y
CONFIG_INET_ESP=y
# CONFIG_INET_ESP_OFFLOAD is not set
CONFIG_INET_IPCOMP=y
CONFIG_INET_XFRM_TUNNEL=y
CONFIG_INET_TUNNEL=y
CONFIG_INET_XFRM_MODE_TRANSPORT=y
CONFIG_INET_XFRM_MODE_TUNNEL=y
CONFIG_INET_XFRM_MODE_BEET=y
CONFIG_INET_DIAG=y
CONFIG_INET_TCP_DIAG=y
# CONFIG_INET_UDP_DIAG is not set
# CONFIG_INET_RAW_DIAG is not set
# CONFIG_INET_DIAG_DESTROY is not set
# CONFIG_TCP_CONG_ADVANCED is not set
CONFIG_TCP_CONG_CUBIC=y
CONFIG_DEFAULT_TCP_CONG="cubic"
# CONFIG_TCP_MD5SIG is not set
CONFIG_IPV6=y
# CONFIG_IPV6_ROUTER_PREF is not set
# CONFIG_IPV6_OPTIMISTIC_DAD is not set
# CONFIG_INET6_AH is not set
# CONFIG_INET6_ESP is not set
# CONFIG_INET6_IPCOMP is not set
# CONFIG_IPV6_MIP6 is not set
CONFIG_INET6_XFRM_MODE_TRANSPORT=y
CONFIG_INET6_XFRM_MODE_TUNNEL=y
CONFIG_INET6_XFRM_MODE_BEET=y
# CONFIG_INET6_XFRM_MODE_ROUTEOPTIMIZATION is not set
# CONFIG_IPV6_VTI is not set
CONFIG_IPV6_SIT=y
# CONFIG_IPV6_SIT_6RD is not set
CONFIG_IPV6_NDISC_NODETYPE=y
# CONFIG_IPV6_TUNNEL is not set
# CONFIG_IPV6_MULTIPLE_TABLES is not set
# CONFIG_IPV6_MROUTE is not set
# CONFIG_IPV6_SEG6_LWTUNNEL is not set
# CONFIG_IPV6_SEG6_HMAC is not set
# CONFIG_NETWORK_SECMARK is not set
CONFIG_NET_PTP_CLASSIFY=y
# CONFIG_NETWORK_PHY_TIMESTAMPING is not set
# CONFIG_NETFILTER is not set
# CONFIG_BPFILTER is not set
# CONFIG_IP_DCCP is not set
CONFIG_IP_SCTP=m
# CONFIG_SCTP_DBG_OBJCNT is not set
CONFIG_SCTP_DEFAULT_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_SHA1 is not set
# CONFIG_SCTP_DEFAULT_COOKIE_HMAC_NONE is not set
CONFIG_SCTP_COOKIE_HMAC_MD5=y
# CONFIG_SCTP_COOKIE_HMAC_SHA1 is not set
CONFIG_INET_SCTP_DIAG=m
# CONFIG_RDS is not set
# CONFIG_TIPC is not set
# CONFIG_ATM is not set
# CONFIG_L2TP is not set
# CONFIG_BRIDGE is not set
CONFIG_HAVE_NET_DSA=y
# CONFIG_NET_DSA is not set
CONFIG_VLAN_8021Q=y
# CONFIG_VLAN_8021Q_GVRP is not set
# CONFIG_VLAN_8021Q_MVRP is not set
# CONFIG_DECNET is not set
# CONFIG_LLC2 is not set
# CONFIG_ATALK is not set
# CONFIG_X25 is not set
# CONFIG_LAPB is not set
# CONFIG_PHONET is not set
# CONFIG_6LOWPAN is not set
# CONFIG_IEEE802154 is not set
# CONFIG_NET_SCHED is not set
# CONFIG_DCB is not set
CONFIG_DNS_RESOLVER=y
# CONFIG_BATMAN_ADV is not set
# CONFIG_OPENVSWITCH is not set
# CONFIG_VSOCKETS is not set
# CONFIG_NETLINK_DIAG is not set
# CONFIG_MPLS is not set
# CONFIG_NET_NSH is not set
# CONFIG_HSR is not set
# CONFIG_NET_SWITCHDEV is not set
# CONFIG_NET_L3_MASTER_DEV is not set
# CONFIG_NET_NCSI is not set
CONFIG_RPS=y
CONFIG_RFS_ACCEL=y
CONFIG_XPS=y
# CONFIG_CGROUP_NET_PRIO is not set
# CONFIG_CGROUP_NET_CLASSID is not set
CONFIG_NET_RX_BUSY_POLL=y
CONFIG_BQL=y
# CONFIG_BPF_JIT is not set
CONFIG_NET_FLOW_LIMIT=y

#
# Network testing
#
# CONFIG_NET_PKTGEN is not set
# CONFIG_NET_DROP_MONITOR is not set
# CONFIG_HAMRADIO is not set
# CONFIG_CAN is not set
# CONFIG_BT is not set
# CONFIG_AF_RXRPC is not set
# CONFIG_AF_KCM is not set
CONFIG_FIB_RULES=y
CONFIG_WIRELESS=y
# CONFIG_CFG80211 is not set

#
# CFG80211 needs to be enabled for MAC80211
#
CONFIG_MAC80211_STA_HASH_MAX_SIZE=0
# CONFIG_WIMAX is not set
# CONFIG_RFKILL is not set
# CONFIG_NET_9P is not set
# CONFIG_CAIF is not set
# CONFIG_CEPH_LIB is not set
# CONFIG_NFC is not set
# CONFIG_PSAMPLE is not set
# CONFIG_NET_IFE is not set
# CONFIG_LWTUNNEL is not set
CONFIG_DST_CACHE=y
CONFIG_GRO_CELLS=y
# CONFIG_NET_DEVLINK is not set
CONFIG_MAY_USE_DEVLINK=y
# CONFIG_FAILOVER is not set
CONFIG_HAVE_EBPF_JIT=y

#
# Device Drivers
#
CONFIG_HAVE_PCI=y
CONFIG_PCI=y
CONFIG_PCI_DOMAINS=y
CONFIG_PCI_SYSCALL=y
CONFIG_PCIEPORTBUS=y
CONFIG_PCIEAER=y
# CONFIG_PCIEAER_INJECT is not set
# CONFIG_PCIE_ECRC is not set
CONFIG_PCIEASPM=y
# CONFIG_PCIEASPM_DEBUG is not set
CONFIG_PCIEASPM_DEFAULT=y
# CONFIG_PCIEASPM_POWERSAVE is not set
# CONFIG_PCIEASPM_POWER_SUPERSAVE is not set
# CONFIG_PCIEASPM_PERFORMANCE is not set
# CONFIG_PCIE_DPC is not set
# CONFIG_PCIE_PTM is not set
CONFIG_PCI_MSI=y
CONFIG_PCI_QUIRKS=y
# CONFIG_PCI_DEBUG is not set
# CONFIG_PCI_STUB is not set
# CONFIG_PCI_IOV is not set
# CONFIG_PCI_PRI is not set
# CONFIG_PCI_PASID is not set
# CONFIG_HOTPLUG_PCI is not set

#
# PCI controller drivers
#

#
# Cadence PCIe controllers support
#
# CONFIG_PCIE_CADENCE_HOST is not set
# CONFIG_PCI_FTPCI100 is not set
# CONFIG_PCI_HOST_GENERIC is not set
# CONFIG_PCIE_XILINX is not set

#
# DesignWare PCI Core Support
#

#
# PCI Endpoint
#
# CONFIG_PCI_ENDPOINT is not set

#
# PCI switch controller drivers
#
# CONFIG_PCI_SW_SWITCHTEC is not set
# CONFIG_PCCARD is not set
CONFIG_HAVE_RAPIDIO=y
# CONFIG_RAPIDIO is not set

#
# Generic Driver Options
#
CONFIG_UEVENT_HELPER=y
CONFIG_UEVENT_HELPER_PATH="/sbin/hotplug"
CONFIG_DEVTMPFS=y
CONFIG_DEVTMPFS_MOUNT=y
CONFIG_STANDALONE=y
CONFIG_PREVENT_FIRMWARE_BUILD=y

#
# Firmware loader
#
CONFIG_FW_LOADER=y
CONFIG_EXTRA_FIRMWARE=""
# CONFIG_FW_LOADER_USER_HELPER is not set
CONFIG_ALLOW_DEV_COREDUMP=y
# CONFIG_DEBUG_DRIVER is not set
# CONFIG_DEBUG_DEVRES is not set
# CONFIG_DEBUG_TEST_DRIVER_REMOVE is not set
# CONFIG_TEST_ASYNC_DRIVER_PROBE is not set
CONFIG_GENERIC_CPU_AUTOPROBE=y
CONFIG_GENERIC_CPU_VULNERABILITIES=y
CONFIG_SOC_BUS=y
CONFIG_REGMAP=y
CONFIG_REGMAP_I2C=y
CONFIG_REGMAP_SPI=y

#
# Bus devices
#
# CONFIG_CONNECTOR is not set
# CONFIG_GNSS is not set
CONFIG_MTD=y
# CONFIG_MTD_TESTS is not set
CONFIG_MTD_CMDLINE_PARTS=y
CONFIG_MTD_OF_PARTS=y
# CONFIG_MTD_AR7_PARTS is not set

#
# Partition parsers
#
# CONFIG_MTD_REDBOOT_PARTS is not set

#
# User Modules And Translation Layers
#
CONFIG_MTD_BLKDEVS=y
CONFIG_MTD_BLOCK=y
# CONFIG_FTL is not set
# CONFIG_NFTL is not set
# CONFIG_INFTL is not set
# CONFIG_RFD_FTL is not set
# CONFIG_SSFDC is not set
# CONFIG_SM_FTL is not set
# CONFIG_MTD_OOPS is not set
# CONFIG_MTD_SWAP is not set
# CONFIG_MTD_PARTITIONED_MASTER is not set

#
# RAM/ROM/Flash chip drivers
#
CONFIG_MTD_CFI=y
# CONFIG_MTD_JEDECPROBE is not set
CONFIG_MTD_GEN_PROBE=y
# CONFIG_MTD_CFI_ADV_OPTIONS is not set
CONFIG_MTD_MAP_BANK_WIDTH_1=y
CONFIG_MTD_MAP_BANK_WIDTH_2=y
CONFIG_MTD_MAP_BANK_WIDTH_4=y
CONFIG_MTD_CFI_I1=y
CONFIG_MTD_CFI_I2=y
# CONFIG_MTD_CFI_INTELEXT is not set
CONFIG_MTD_CFI_AMDSTD=y
# CONFIG_MTD_CFI_STAA is not set
CONFIG_MTD_CFI_UTIL=y
# CONFIG_MTD_RAM is not set
# CONFIG_MTD_ROM is not set
# CONFIG_MTD_ABSENT is not set

#
# Mapping drivers for chip access
#
# CONFIG_MTD_COMPLEX_MAPPINGS is not set
# CONFIG_MTD_PHYSMAP is not set
# CONFIG_MTD_INTEL_VR_NOR is not set
# CONFIG_MTD_PLATRAM is not set

#
# Self-contained MTD device drivers
#
# CONFIG_MTD_PMC551 is not set
# CONFIG_MTD_DATAFLASH is not set
CONFIG_MTD_M25P80=y
# CONFIG_MTD_MCHP23K256 is not set
# CONFIG_MTD_SST25L is not set
# CONFIG_MTD_SLRAM is not set
# CONFIG_MTD_PHRAM is not set
# CONFIG_MTD_MTDRAM is not set
# CONFIG_MTD_BLOCK2MTD is not set

#
# Disk-On-Chip Device Drivers
#
# CONFIG_MTD_DOCG3 is not set
# CONFIG_MTD_ONENAND is not set
CONFIG_MTD_NAND_ECC=y
# CONFIG_MTD_NAND_ECC_SMC is not set
CONFIG_MTD_NAND=y
# CONFIG_MTD_NAND_ECC_BCH is not set
# CONFIG_MTD_NAND_DENALI_PCI is not set
# CONFIG_MTD_NAND_DENALI_DT is not set
# CONFIG_MTD_NAND_GPIO is not set
# CONFIG_MTD_NAND_RICOH is not set
# CONFIG_MTD_NAND_DISKONCHIP is not set
# CONFIG_MTD_NAND_CAFE is not set
# CONFIG_MTD_NAND_NANDSIM is not set
# CONFIG_MTD_NAND_PLATFORM is not set
# CONFIG_MTD_NAND_FSL_ELBC is not set
CONFIG_MTD_NAND_FSL_IFC=y
# CONFIG_MTD_SPI_NAND is not set

#
# LPDDR & LPDDR2 PCM memory drivers
#
# CONFIG_MTD_LPDDR is not set
CONFIG_MTD_SPI_NOR=y
# CONFIG_MTD_MT81xx_NOR is not set
# CONFIG_MTD_SPI_NOR_USE_4K_SECTORS is not set
# CONFIG_MTD_UBI is not set
CONFIG_DTC=y
CONFIG_OF=y
# CONFIG_OF_UNITTEST is not set
CONFIG_OF_FLATTREE=y
CONFIG_OF_EARLY_FLATTREE=y
CONFIG_OF_KOBJ=y
CONFIG_OF_ADDRESS=y
CONFIG_OF_IRQ=y
CONFIG_OF_NET=y
CONFIG_OF_MDIO=y
CONFIG_OF_RESERVED_MEM=y
# CONFIG_OF_OVERLAY is not set
CONFIG_ARCH_MIGHT_HAVE_PC_PARPORT=y
# CONFIG_PARPORT is not set
CONFIG_BLK_DEV=y
# CONFIG_BLK_DEV_NULL_BLK is not set
# CONFIG_BLK_DEV_FD is not set
CONFIG_CDROM=y
# CONFIG_BLK_DEV_PCIESSD_MTIP32XX is not set
# CONFIG_BLK_DEV_UMEM is not set
CONFIG_BLK_DEV_LOOP=y
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
# CONFIG_BLK_DEV_CRYPTOLOOP is not set
# CONFIG_BLK_DEV_DRBD is not set
# CONFIG_BLK_DEV_NBD is not set
# CONFIG_BLK_DEV_SKD is not set
# CONFIG_BLK_DEV_SX8 is not set
CONFIG_BLK_DEV_RAM=y
CONFIG_BLK_DEV_RAM_COUNT=16
CONFIG_BLK_DEV_RAM_SIZE=262144
# CONFIG_CDROM_PKTCDVD is not set
# CONFIG_ATA_OVER_ETH is not set
# CONFIG_BLK_DEV_RBD is not set
# CONFIG_BLK_DEV_RSXX is not set

#
# NVME Support
#
# CONFIG_BLK_DEV_NVME is not set
# CONFIG_NVME_FC is not set

#
# Misc devices
#
# CONFIG_AD525X_DPOT is not set
# CONFIG_DUMMY_IRQ is not set
# CONFIG_PHANTOM is not set
# CONFIG_SGI_IOC4 is not set
# CONFIG_TIFM_CORE is not set
# CONFIG_ICS932S401 is not set
# CONFIG_ENCLOSURE_SERVICES is not set
# CONFIG_HP_ILO is not set
# CONFIG_APDS9802ALS is not set
# CONFIG_ISL29003 is not set
# CONFIG_ISL29020 is not set
# CONFIG_SENSORS_TSL2550 is not set
# CONFIG_SENSORS_BH1770 is not set
# CONFIG_SENSORS_APDS990X is not set
# CONFIG_HMC6352 is not set
# CONFIG_DS1682 is not set
# CONFIG_USB_SWITCH_FSA9480 is not set
# CONFIG_LATTICE_ECP3_CONFIG is not set
# CONFIG_SRAM is not set
# CONFIG_PCI_ENDPOINT_TEST is not set
# CONFIG_PVPANIC is not set
# CONFIG_C2PORT is not set

#
# EEPROM support
#
# CONFIG_EEPROM_AT24 is not set
# CONFIG_EEPROM_AT25 is not set
# CONFIG_EEPROM_LEGACY is not set
# CONFIG_EEPROM_MAX6875 is not set
# CONFIG_EEPROM_93CX6 is not set
# CONFIG_EEPROM_93XX46 is not set
# CONFIG_EEPROM_IDT_89HPESX is not set
# CONFIG_EEPROM_EE1004 is not set
# CONFIG_CB710_CORE is not set

#
# Texas Instruments shared transport line discipline
#
# CONFIG_TI_ST is not set
# CONFIG_SENSORS_LIS3_SPI is not set
# CONFIG_SENSORS_LIS3_I2C is not set
# CONFIG_ALTERA_STAPL is not set

#
# Intel MIC & related support
#

#
# Intel MIC Bus Driver
#

#
# SCIF Bus Driver
#

#
# VOP Bus Driver
#

#
# Intel MIC Host Driver
#

#
# Intel MIC Card Driver
#

#
# SCIF Driver
#

#
# Intel MIC Coprocessor State Management (COSM) Drivers
#

#
# VOP Driver
#
# CONFIG_GENWQE is not set
# CONFIG_ECHO is not set
# CONFIG_MISC_ALCOR_PCI is not set
# CONFIG_MISC_RTSX_PCI is not set
# CONFIG_MISC_RTSX_USB is not set
CONFIG_HAVE_IDE=y
# CONFIG_IDE is not set

#
# SCSI device support
#
CONFIG_SCSI_MOD=y
# CONFIG_RAID_ATTRS is not set
CONFIG_SCSI=y
CONFIG_SCSI_DMA=y
CONFIG_SCSI_PROC_FS=y

#
# SCSI support type (disk, tape, CD-ROM)
#
CONFIG_BLK_DEV_SD=y
CONFIG_CHR_DEV_ST=y
# CONFIG_CHR_DEV_OSST is not set
CONFIG_BLK_DEV_SR=y
# CONFIG_BLK_DEV_SR_VENDOR is not set
CONFIG_CHR_DEV_SG=y
# CONFIG_CHR_DEV_SCH is not set
# CONFIG_SCSI_CONSTANTS is not set
CONFIG_SCSI_LOGGING=y
# CONFIG_SCSI_SCAN_ASYNC is not set

#
# SCSI Transports
#
CONFIG_SCSI_SPI_ATTRS=y
# CONFIG_SCSI_FC_ATTRS is not set
# CONFIG_SCSI_ISCSI_ATTRS is not set
# CONFIG_SCSI_SAS_ATTRS is not set
# CONFIG_SCSI_SAS_LIBSAS is not set
# CONFIG_SCSI_SRP_ATTRS is not set
CONFIG_SCSI_LOWLEVEL=y
# CONFIG_ISCSI_TCP is not set
# CONFIG_ISCSI_BOOT_SYSFS is not set
# CONFIG_SCSI_CXGB3_ISCSI is not set
# CONFIG_SCSI_CXGB4_ISCSI is not set
# CONFIG_SCSI_BNX2_ISCSI is not set
# CONFIG_BE2ISCSI is not set
# CONFIG_BLK_DEV_3W_XXXX_RAID is not set
# CONFIG_SCSI_HPSA is not set
# CONFIG_SCSI_3W_9XXX is not set
# CONFIG_SCSI_3W_SAS is not set
# CONFIG_SCSI_ACARD is not set
# CONFIG_SCSI_AACRAID is not set
# CONFIG_SCSI_AIC7XXX is not set
# CONFIG_SCSI_AIC79XX is not set
# CONFIG_SCSI_AIC94XX is not set
# CONFIG_SCSI_MVSAS is not set
# CONFIG_SCSI_MVUMI is not set
# CONFIG_SCSI_ADVANSYS is not set
# CONFIG_SCSI_ARCMSR is not set
# CONFIG_SCSI_ESAS2R is not set
# CONFIG_MEGARAID_NEWGEN is not set
# CONFIG_MEGARAID_LEGACY is not set
# CONFIG_MEGARAID_SAS is not set
# CONFIG_SCSI_MPT3SAS is not set
# CONFIG_SCSI_MPT2SAS is not set
# CONFIG_SCSI_SMARTPQI is not set
# CONFIG_SCSI_UFSHCD is not set
# CONFIG_SCSI_HPTIOP is not set
# CONFIG_SCSI_MYRB is not set
# CONFIG_SCSI_SNIC is not set
# CONFIG_SCSI_DMX3191D is not set
# CONFIG_SCSI_GDTH is not set
# CONFIG_SCSI_IPS is not set
# CONFIG_SCSI_INITIO is not set
# CONFIG_SCSI_INIA100 is not set
# CONFIG_SCSI_STEX is not set
# CONFIG_SCSI_SYM53C8XX_2 is not set
# CONFIG_SCSI_IPR is not set
# CONFIG_SCSI_QLOGIC_1280 is not set
# CONFIG_SCSI_QLA_ISCSI is not set
# CONFIG_SCSI_DC395x is not set
# CONFIG_SCSI_AM53C974 is not set
# CONFIG_SCSI_WD719X is not set
# CONFIG_SCSI_DEBUG is not set
# CONFIG_SCSI_PMCRAID is not set
# CONFIG_SCSI_PM8001 is not set
# CONFIG_SCSI_DH is not set
# CONFIG_SCSI_OSD_INITIATOR is not set
CONFIG_ATA=y
CONFIG_ATA_VERBOSE_ERROR=y
CONFIG_SATA_PMP=y

#
# Controllers with non-SFF native interface
#
# CONFIG_SATA_AHCI is not set
# CONFIG_SATA_AHCI_PLATFORM is not set
# CONFIG_AHCI_CEVA is not set
# CONFIG_AHCI_QORIQ is not set
CONFIG_SATA_FSL=y
# CONFIG_SATA_INIC162X is not set
# CONFIG_SATA_ACARD_AHCI is not set
CONFIG_SATA_SIL24=y
CONFIG_ATA_SFF=y

#
# SFF controllers with custom DMA interface
#
# CONFIG_PDC_ADMA is not set
# CONFIG_SATA_QSTOR is not set
# CONFIG_SATA_SX4 is not set
CONFIG_ATA_BMDMA=y

#
# SATA SFF controllers with BMDMA
#
# CONFIG_ATA_PIIX is not set
# CONFIG_SATA_DWC is not set
# CONFIG_SATA_MV is not set
# CONFIG_SATA_NV is not set
# CONFIG_SATA_PROMISE is not set
# CONFIG_SATA_SIL is not set
# CONFIG_SATA_SIS is not set
# CONFIG_SATA_SVW is not set
# CONFIG_SATA_ULI is not set
# CONFIG_SATA_VIA is not set
# CONFIG_SATA_VITESSE is not set

#
# PATA SFF controllers with BMDMA
#
# CONFIG_PATA_ALI is not set
# CONFIG_PATA_AMD is not set
# CONFIG_PATA_ARTOP is not set
# CONFIG_PATA_ATIIXP is not set
# CONFIG_PATA_ATP867X is not set
# CONFIG_PATA_CMD64X is not set
# CONFIG_PATA_CYPRESS is not set
# CONFIG_PATA_EFAR is not set
# CONFIG_PATA_HPT366 is not set
# CONFIG_PATA_HPT37X is not set
# CONFIG_PATA_HPT3X2N is not set
# CONFIG_PATA_HPT3X3 is not set
# CONFIG_PATA_IT8213 is not set
# CONFIG_PATA_IT821X is not set
# CONFIG_PATA_JMICRON is not set
# CONFIG_PATA_MARVELL is not set
# CONFIG_PATA_NETCELL is not set
# CONFIG_PATA_NINJA32 is not set
# CONFIG_PATA_NS87415 is not set
# CONFIG_PATA_OLDPIIX is not set
# CONFIG_PATA_OPTIDMA is not set
# CONFIG_PATA_PDC2027X is not set
# CONFIG_PATA_PDC_OLD is not set
# CONFIG_PATA_RADISYS is not set
# CONFIG_PATA_RDC is not set
# CONFIG_PATA_SCH is not set
# CONFIG_PATA_SERVERWORKS is not set
# CONFIG_PATA_SIL680 is not set
# CONFIG_PATA_SIS is not set
# CONFIG_PATA_TOSHIBA is not set
# CONFIG_PATA_TRIFLEX is not set
# CONFIG_PATA_VIA is not set
# CONFIG_PATA_WINBOND is not set

#
# PIO-only SFF controllers
#
# CONFIG_PATA_CMD640_PCI is not set
# CONFIG_PATA_MPIIX is not set
# CONFIG_PATA_NS87410 is not set
# CONFIG_PATA_OPTI is not set
# CONFIG_PATA_PLATFORM is not set
# CONFIG_PATA_RZ1000 is not set

#
# Generic fallback / legacy drivers
#
# CONFIG_ATA_GENERIC is not set
# CONFIG_PATA_LEGACY is not set
CONFIG_MD=y
CONFIG_BLK_DEV_MD=y
# CONFIG_MD_AUTODETECT is not set
# CONFIG_MD_LINEAR is not set
# CONFIG_MD_RAID0 is not set
# CONFIG_MD_RAID1 is not set
# CONFIG_MD_RAID10 is not set
# CONFIG_MD_RAID456 is not set
# CONFIG_MD_MULTIPATH is not set
# CONFIG_MD_FAULTY is not set
# CONFIG_BCACHE is not set
# CONFIG_BLK_DEV_DM is not set
# CONFIG_TARGET_CORE is not set
# CONFIG_FUSION is not set

#
# IEEE 1394 (FireWire) support
#
# CONFIG_FIREWIRE is not set
# CONFIG_FIREWIRE_NOSY is not set
# CONFIG_MACINTOSH_DRIVERS is not set
CONFIG_NETDEVICES=y
CONFIG_NET_CORE=y
# CONFIG_BONDING is not set
# CONFIG_DUMMY is not set
# CONFIG_EQUALIZER is not set
# CONFIG_NET_FC is not set
# CONFIG_NET_TEAM is not set
# CONFIG_MACVLAN is not set
# CONFIG_VXLAN is not set
# CONFIG_MACSEC is not set
# CONFIG_NETCONSOLE is not set
# CONFIG_TUN is not set
# CONFIG_TUN_VNET_CROSS_LE is not set
# CONFIG_VETH is not set
# CONFIG_NLMON is not set
# CONFIG_ARCNET is not set

#
# CAIF transport drivers
#

#
# Distributed Switch Architecture drivers
#
CONFIG_ETHERNET=y
CONFIG_NET_VENDOR_3COM=y
# CONFIG_VORTEX is not set
# CONFIG_TYPHOON is not set
CONFIG_NET_VENDOR_ADAPTEC=y
# CONFIG_ADAPTEC_STARFIRE is not set
CONFIG_NET_VENDOR_AGERE=y
# CONFIG_ET131X is not set
CONFIG_NET_VENDOR_ALACRITECH=y
# CONFIG_SLICOSS is not set
CONFIG_NET_VENDOR_ALTEON=y
# CONFIG_ACENIC is not set
# CONFIG_ALTERA_TSE is not set
CONFIG_NET_VENDOR_AMAZON=y
CONFIG_NET_VENDOR_AMD=y
# CONFIG_AMD8111_ETH is not set
# CONFIG_PCNET32 is not set
CONFIG_NET_VENDOR_AQUANTIA=y
CONFIG_NET_VENDOR_ARC=y
CONFIG_NET_VENDOR_ATHEROS=y
# CONFIG_ATL2 is not set
# CONFIG_ATL1 is not set
# CONFIG_ATL1E is not set
# CONFIG_ATL1C is not set
# CONFIG_ALX is not set
CONFIG_NET_VENDOR_AURORA=y
# CONFIG_AURORA_NB8800 is not set
CONFIG_NET_VENDOR_BROADCOM=y
# CONFIG_B44 is not set
# CONFIG_BCMGENET is not set
# CONFIG_BNX2 is not set
# CONFIG_CNIC is not set
# CONFIG_TIGON3 is not set
# CONFIG_BNX2X is not set
# CONFIG_SYSTEMPORT is not set
# CONFIG_BNXT is not set
CONFIG_NET_VENDOR_BROCADE=y
# CONFIG_BNA is not set
CONFIG_NET_VENDOR_CADENCE=y
# CONFIG_MACB is not set
CONFIG_NET_VENDOR_CAVIUM=y
# CONFIG_THUNDER_NIC_PF is not set
# CONFIG_THUNDER_NIC_VF is not set
# CONFIG_THUNDER_NIC_BGX is not set
# CONFIG_THUNDER_NIC_RGX is not set
CONFIG_CAVIUM_PTP=y
# CONFIG_LIQUIDIO is not set
# CONFIG_LIQUIDIO_VF is not set
CONFIG_NET_VENDOR_CHELSIO=y
# CONFIG_CHELSIO_T1 is not set
# CONFIG_CHELSIO_T3 is not set
# CONFIG_CHELSIO_T4 is not set
# CONFIG_CHELSIO_T4VF is not set
CONFIG_NET_VENDOR_CISCO=y
# CONFIG_ENIC is not set
CONFIG_NET_VENDOR_CORTINA=y
# CONFIG_GEMINI_ETHERNET is not set
# CONFIG_DNET is not set
CONFIG_NET_VENDOR_DEC=y
# CONFIG_NET_TULIP is not set
CONFIG_NET_VENDOR_DLINK=y
# CONFIG_DL2K is not set
# CONFIG_SUNDANCE is not set
CONFIG_NET_VENDOR_EMULEX=y
# CONFIG_BE2NET is not set
CONFIG_NET_VENDOR_EZCHIP=y
# CONFIG_EZCHIP_NPS_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_FREESCALE=y
# CONFIG_FSL_FMAN is not set
# CONFIG_FSL_PQ_MDIO is not set
CONFIG_FSL_XGMAC_MDIO=y
# CONFIG_GIANFAR is not set
CONFIG_NET_VENDOR_HP=y
# CONFIG_HP100 is not set
CONFIG_NET_VENDOR_HUAWEI=y
CONFIG_NET_VENDOR_I825XX=y
CONFIG_NET_VENDOR_INTEL=y
# CONFIG_E100 is not set
# CONFIG_E1000 is not set
CONFIG_E1000E=y
# CONFIG_IGB is not set
# CONFIG_IGBVF is not set
# CONFIG_IXGB is not set
# CONFIG_IXGBE is not set
# CONFIG_IXGBEVF is not set
# CONFIG_I40E is not set
# CONFIG_I40EVF is not set
# CONFIG_ICE is not set
# CONFIG_FM10K is not set
# CONFIG_IGC is not set
# CONFIG_JME is not set
CONFIG_NET_VENDOR_MARVELL=y
# CONFIG_MVMDIO is not set
# CONFIG_SKGE is not set
# CONFIG_SKY2 is not set
CONFIG_NET_VENDOR_MELLANOX=y
# CONFIG_MLX4_EN is not set
# CONFIG_MLX5_CORE is not set
# CONFIG_MLXSW_CORE is not set
# CONFIG_MLXFW is not set
CONFIG_NET_VENDOR_MICREL=y
# CONFIG_KS8842 is not set
# CONFIG_KS8851 is not set
# CONFIG_KS8851_MLL is not set
# CONFIG_KSZ884X_PCI is not set
CONFIG_NET_VENDOR_MICROCHIP=y
# CONFIG_ENC28J60 is not set
# CONFIG_ENCX24J600 is not set
# CONFIG_LAN743X is not set
CONFIG_NET_VENDOR_MICROSEMI=y
CONFIG_NET_VENDOR_MYRI=y
# CONFIG_MYRI10GE is not set
# CONFIG_FEALNX is not set
CONFIG_NET_VENDOR_NATSEMI=y
# CONFIG_NATSEMI is not set
# CONFIG_NS83820 is not set
CONFIG_NET_VENDOR_NETERION=y
# CONFIG_S2IO is not set
# CONFIG_VXGE is not set
CONFIG_NET_VENDOR_NETRONOME=y
# CONFIG_NFP is not set
CONFIG_NET_VENDOR_NI=y
# CONFIG_NI_XGE_MANAGEMENT_ENET is not set
CONFIG_NET_VENDOR_8390=y
# CONFIG_NE2K_PCI is not set
CONFIG_NET_VENDOR_NVIDIA=y
# CONFIG_FORCEDETH is not set
CONFIG_NET_VENDOR_OKI=y
# CONFIG_ETHOC is not set
CONFIG_NET_VENDOR_PACKET_ENGINES=y
# CONFIG_HAMACHI is not set
# CONFIG_YELLOWFIN is not set
CONFIG_NET_VENDOR_QLOGIC=y
# CONFIG_QLA3XXX is not set
# CONFIG_QLCNIC is not set
# CONFIG_QLGE is not set
# CONFIG_NETXEN_NIC is not set
# CONFIG_QED is not set
CONFIG_NET_VENDOR_QUALCOMM=y
# CONFIG_QCA7000_SPI is not set
# CONFIG_QCOM_EMAC is not set
# CONFIG_RMNET is not set
CONFIG_NET_VENDOR_RDC=y
# CONFIG_R6040 is not set
CONFIG_NET_VENDOR_REALTEK=y
# CONFIG_8139CP is not set
# CONFIG_8139TOO is not set
# CONFIG_R8169 is not set
CONFIG_NET_VENDOR_RENESAS=y
CONFIG_NET_VENDOR_ROCKER=y
CONFIG_NET_VENDOR_SAMSUNG=y
# CONFIG_SXGBE_ETH is not set
CONFIG_NET_VENDOR_SEEQ=y
CONFIG_NET_VENDOR_SOLARFLARE=y
# CONFIG_SFC is not set
# CONFIG_SFC_FALCON is not set
CONFIG_NET_VENDOR_SILAN=y
# CONFIG_SC92031 is not set
CONFIG_NET_VENDOR_SIS=y
# CONFIG_SIS900 is not set
# CONFIG_SIS190 is not set
CONFIG_NET_VENDOR_SMSC=y
# CONFIG_EPIC100 is not set
# CONFIG_SMSC911X is not set
# CONFIG_SMSC9420 is not set
CONFIG_NET_VENDOR_SOCIONEXT=y
CONFIG_NET_VENDOR_STMICRO=y
# CONFIG_STMMAC_ETH is not set
CONFIG_NET_VENDOR_SUN=y
# CONFIG_HAPPYMEAL is not set
# CONFIG_SUNGEM is not set
# CONFIG_CASSINI is not set
# CONFIG_NIU is not set
CONFIG_NET_VENDOR_SYNOPSYS=y
# CONFIG_DWC_XLGMAC is not set
CONFIG_NET_VENDOR_TEHUTI=y
# CONFIG_TEHUTI is not set
CONFIG_NET_VENDOR_TI=y
# CONFIG_TI_CPSW_ALE is not set
# CONFIG_TLAN is not set
CONFIG_NET_VENDOR_VIA=y
# CONFIG_VIA_RHINE is not set
# CONFIG_VIA_VELOCITY is not set
CONFIG_NET_VENDOR_WIZNET=y
# CONFIG_WIZNET_W5100 is not set
# CONFIG_WIZNET_W5300 is not set
CONFIG_NET_VENDOR_XILINX=y
# CONFIG_FDDI is not set
# CONFIG_HIPPI is not set
CONFIG_MDIO_DEVICE=y
CONFIG_MDIO_BUS=y
# CONFIG_MDIO_BCM_UNIMAC is not set
# CONFIG_MDIO_BITBANG is not set
CONFIG_MDIO_BUS_MUX=y
# CONFIG_MDIO_BUS_MUX_GPIO is not set
CONFIG_MDIO_BUS_MUX_MMIOREG=y
# CONFIG_MDIO_HISI_FEMAC is not set
# CONFIG_MDIO_MSCC_MIIM is not set
# CONFIG_MDIO_OCTEON is not set
# CONFIG_MDIO_THUNDER is not set
CONFIG_PHYLIB=y
CONFIG_SWPHY=y

#
# MII PHY device drivers
#
# CONFIG_AMD_PHY is not set
CONFIG_AQUANTIA_PHY=y
# CONFIG_ASIX_PHY is not set
# CONFIG_AT803X_PHY is not set
# CONFIG_BCM7XXX_PHY is not set
# CONFIG_BCM87XX_PHY is not set
# CONFIG_BROADCOM_PHY is not set
# CONFIG_CICADA_PHY is not set
# CONFIG_CORTINA_PHY is not set
# CONFIG_DAVICOM_PHY is not set
# CONFIG_DP83822_PHY is not set
# CONFIG_DP83TC811_PHY is not set
# CONFIG_DP83848_PHY is not set
# CONFIG_DP83867_PHY is not set
CONFIG_FIXED_PHY=y
# CONFIG_ICPLUS_PHY is not set
# CONFIG_INTEL_XWAY_PHY is not set
# CONFIG_LSI_ET1011C_PHY is not set
# CONFIG_LXT_PHY is not set
# CONFIG_MARVELL_PHY is not set
# CONFIG_MARVELL_10G_PHY is not set
# CONFIG_MICREL_PHY is not set
# CONFIG_MICROCHIP_PHY is not set
# CONFIG_MICROCHIP_T1_PHY is not set
# CONFIG_MICROSEMI_PHY is not set
# CONFIG_NATIONAL_PHY is not set
# CONFIG_QSEMI_PHY is not set
# CONFIG_REALTEK_PHY is not set
# CONFIG_RENESAS_PHY is not set
# CONFIG_ROCKCHIP_PHY is not set
# CONFIG_SMSC_PHY is not set
# CONFIG_STE10XP is not set
CONFIG_TERANETICS_PHY=y
CONFIG_VITESSE_PHY=y
# CONFIG_XILINX_GMII2RGMII is not set
# CONFIG_MICREL_KS8995MA is not set
# CONFIG_PPP is not set
# CONFIG_SLIP is not set
CONFIG_USB_NET_DRIVERS=y
# CONFIG_USB_CATC is not set
# CONFIG_USB_KAWETH is not set
# CONFIG_USB_PEGASUS is not set
# CONFIG_USB_RTL8150 is not set
# CONFIG_USB_RTL8152 is not set
# CONFIG_USB_LAN78XX is not set
# CONFIG_USB_USBNET is not set
# CONFIG_USB_IPHETH is not set
CONFIG_WLAN=y
# CONFIG_WIRELESS_WDS is not set
CONFIG_WLAN_VENDOR_ADMTEK=y
CONFIG_WLAN_VENDOR_ATH=y
# CONFIG_ATH_DEBUG is not set
# CONFIG_ATH5K_PCI is not set
CONFIG_WLAN_VENDOR_ATMEL=y
CONFIG_WLAN_VENDOR_BROADCOM=y
CONFIG_WLAN_VENDOR_CISCO=y
CONFIG_WLAN_VENDOR_INTEL=y
# CONFIG_IWLWIFI is not set
CONFIG_WLAN_VENDOR_INTERSIL=y
# CONFIG_HOSTAP is not set
# CONFIG_PRISM54 is not set
CONFIG_WLAN_VENDOR_MARVELL=y
CONFIG_WLAN_VENDOR_MEDIATEK=y
CONFIG_WLAN_VENDOR_RALINK=y
CONFIG_WLAN_VENDOR_REALTEK=y
CONFIG_WLAN_VENDOR_RSI=y
CONFIG_WLAN_VENDOR_ST=y
CONFIG_WLAN_VENDOR_TI=y
CONFIG_WLAN_VENDOR_ZYDAS=y
CONFIG_WLAN_VENDOR_QUANTENNA=y

#
# Enable WiMAX (Networking options) to see the WiMAX drivers
#
# CONFIG_WAN is not set
# CONFIG_VMXNET3 is not set
# CONFIG_NETDEVSIM is not set
# CONFIG_NET_FAILOVER is not set
# CONFIG_ISDN is not set
# CONFIG_NVM is not set

#
# Input device support
#
CONFIG_INPUT=y
# CONFIG_INPUT_FF_MEMLESS is not set
# CONFIG_INPUT_POLLDEV is not set
# CONFIG_INPUT_SPARSEKMAP is not set
# CONFIG_INPUT_MATRIXKMAP is not set

#
# Userland interfaces
#
# CONFIG_INPUT_MOUSEDEV is not set
# CONFIG_INPUT_JOYDEV is not set
# CONFIG_INPUT_EVDEV is not set
# CONFIG_INPUT_EVBUG is not set

#
# Input Device Drivers
#
# CONFIG_INPUT_KEYBOARD is not set
# CONFIG_INPUT_MOUSE is not set
# CONFIG_INPUT_JOYSTICK is not set
# CONFIG_INPUT_TABLET is not set
# CONFIG_INPUT_TOUCHSCREEN is not set
# CONFIG_INPUT_MISC is not set
# CONFIG_RMI4_CORE is not set

#
# Hardware I/O ports
#
CONFIG_SERIO=y
CONFIG_ARCH_MIGHT_HAVE_PC_SERIO=y
CONFIG_SERIO_I8042=y
CONFIG_SERIO_SERPORT=y
# CONFIG_SERIO_PCIPS2 is not set
CONFIG_SERIO_LIBPS2=y
# CONFIG_SERIO_RAW is not set
# CONFIG_SERIO_XILINX_XPS_PS2 is not set
# CONFIG_SERIO_ALTERA_PS2 is not set
# CONFIG_SERIO_PS2MULT is not set
# CONFIG_SERIO_ARC_PS2 is not set
# CONFIG_SERIO_APBPS2 is not set
# CONFIG_SERIO_OLPC_APSP is not set
# CONFIG_SERIO_GPIO_PS2 is not set
# CONFIG_USERIO is not set
# CONFIG_GAMEPORT is not set

#
# Character devices
#
CONFIG_TTY=y
CONFIG_VT=y
CONFIG_CONSOLE_TRANSLATIONS=y
CONFIG_VT_CONSOLE=y
CONFIG_HW_CONSOLE=y
# CONFIG_VT_HW_CONSOLE_BINDING is not set
CONFIG_UNIX98_PTYS=y
# CONFIG_LEGACY_PTYS is not set
# CONFIG_SERIAL_NONSTANDARD is not set
# CONFIG_NOZOMI is not set
# CONFIG_N_GSM is not set
# CONFIG_TRACE_SINK is not set
CONFIG_PPC_EPAPR_HV_BYTECHAN=y
# CONFIG_PPC_EARLY_DEBUG_EHV_BC is not set
CONFIG_DEVMEM=y
CONFIG_DEVKMEM=y

#
# Serial drivers
#
CONFIG_SERIAL_EARLYCON=y
CONFIG_SERIAL_8250=y
CONFIG_SERIAL_8250_DEPRECATED_OPTIONS=y
# CONFIG_SERIAL_8250_FINTEK is not set
CONFIG_SERIAL_8250_CONSOLE=y
CONFIG_SERIAL_8250_DMA=y
CONFIG_SERIAL_8250_PCI=y
CONFIG_SERIAL_8250_EXAR=y
CONFIG_SERIAL_8250_NR_UARTS=4
CONFIG_SERIAL_8250_RUNTIME_UARTS=4
CONFIG_SERIAL_8250_EXTENDED=y
CONFIG_SERIAL_8250_MANY_PORTS=y
# CONFIG_SERIAL_8250_ASPEED_VUART is not set
CONFIG_SERIAL_8250_SHARE_IRQ=y
CONFIG_SERIAL_8250_DETECT_IRQ=y
CONFIG_SERIAL_8250_RSA=y
CONFIG_SERIAL_8250_FSL=y
# CONFIG_SERIAL_8250_DW is not set
# CONFIG_SERIAL_8250_RT288X is not set
# CONFIG_SERIAL_8250_MOXA is not set
# CONFIG_SERIAL_OF_PLATFORM is not set

#
# Non-8250 serial port support
#
# CONFIG_SERIAL_MAX3100 is not set
# CONFIG_SERIAL_MAX310X is not set
# CONFIG_SERIAL_UARTLITE is not set
CONFIG_SERIAL_CORE=y
CONFIG_SERIAL_CORE_CONSOLE=y
# CONFIG_SERIAL_JSM is not set
# CONFIG_SERIAL_SCCNXP is not set
# CONFIG_SERIAL_SC16IS7XX is not set
# CONFIG_SERIAL_ALTERA_JTAGUART is not set
# CONFIG_SERIAL_ALTERA_UART is not set
# CONFIG_SERIAL_IFX6X60 is not set
# CONFIG_SERIAL_XILINX_PS_UART is not set
# CONFIG_SERIAL_ARC is not set
# CONFIG_SERIAL_RP2 is not set
# CONFIG_SERIAL_FSL_LPUART is not set
# CONFIG_SERIAL_CONEXANT_DIGICOLOR is not set
# CONFIG_SERIAL_DEV_BUS is not set
# CONFIG_TTY_PRINTK is not set
# CONFIG_HVC_UDBG is not set
# CONFIG_IPMI_HANDLER is not set
CONFIG_HW_RANDOM=y
# CONFIG_HW_RANDOM_TIMERIOMEM is not set
# CONFIG_R3964 is not set
# CONFIG_APPLICOM is not set
# CONFIG_RAW_DRIVER is not set
# CONFIG_HANGCHECK_TIMER is not set
# CONFIG_TCG_TPM is not set
CONFIG_DEVPORT=y
# CONFIG_XILLYBUS is not set
# CONFIG_RANDOM_TRUST_CPU is not set

#
# I2C support
#
CONFIG_I2C=y
CONFIG_I2C_BOARDINFO=y
CONFIG_I2C_COMPAT=y
CONFIG_I2C_CHARDEV=y
CONFIG_I2C_MUX=y

#
# Multiplexer I2C Chip support
#
# CONFIG_I2C_ARB_GPIO_CHALLENGE is not set
# CONFIG_I2C_MUX_GPIO is not set
# CONFIG_I2C_MUX_GPMUX is not set
# CONFIG_I2C_MUX_LTC4306 is not set
# CONFIG_I2C_MUX_PCA9541 is not set
CONFIG_I2C_MUX_PCA954x=y
# CONFIG_I2C_MUX_REG is not set
# CONFIG_I2C_MUX_MLXCPLD is not set
CONFIG_I2C_HELPER_AUTO=y

#
# I2C Hardware Bus support
#

#
# PC SMBus host controller drivers
#
# CONFIG_I2C_ALI1535 is not set
# CONFIG_I2C_ALI1563 is not set
# CONFIG_I2C_ALI15X3 is not set
# CONFIG_I2C_AMD756 is not set
# CONFIG_I2C_AMD8111 is not set
# CONFIG_I2C_I801 is not set
# CONFIG_I2C_ISCH is not set
# CONFIG_I2C_PIIX4 is not set
# CONFIG_I2C_NFORCE2 is not set
# CONFIG_I2C_NVIDIA_GPU is not set
# CONFIG_I2C_SIS5595 is not set
# CONFIG_I2C_SIS630 is not set
# CONFIG_I2C_SIS96X is not set
# CONFIG_I2C_VIA is not set
# CONFIG_I2C_VIAPRO is not set

#
# I2C system bus drivers (mostly embedded / system-on-chip)
#
# CONFIG_I2C_CBUS_GPIO is not set
# CONFIG_I2C_DESIGNWARE_PLATFORM is not set
# CONFIG_I2C_DESIGNWARE_PCI is not set
# CONFIG_I2C_EMEV2 is not set
# CONFIG_I2C_GPIO is not set
CONFIG_I2C_MPC=y
# CONFIG_I2C_OCORES is not set
# CONFIG_I2C_PCA_PLATFORM is not set
# CONFIG_I2C_RK3X is not set
# CONFIG_I2C_SIMTEC is not set
# CONFIG_I2C_XILINX is not set

#
# External I2C/SMBus adapter drivers
#
# CONFIG_I2C_DIOLAN_U2C is not set
# CONFIG_I2C_PARPORT_LIGHT is not set
# CONFIG_I2C_ROBOTFUZZ_OSIF is not set
# CONFIG_I2C_TAOS_EVM is not set
# CONFIG_I2C_TINY_USB is not set

#
# Other I2C/SMBus bus drivers
#
# CONFIG_I2C_STUB is not set
# CONFIG_I2C_SLAVE is not set
# CONFIG_I2C_DEBUG_CORE is not set
# CONFIG_I2C_DEBUG_ALGO is not set
# CONFIG_I2C_DEBUG_BUS is not set
# CONFIG_I3C is not set
CONFIG_SPI=y
# CONFIG_SPI_DEBUG is not set
CONFIG_SPI_MASTER=y
CONFIG_SPI_MEM=y

#
# SPI Master Controller Drivers
#
# CONFIG_SPI_ALTERA is not set
# CONFIG_SPI_AXI_SPI_ENGINE is not set
CONFIG_SPI_BITBANG=y
# CONFIG_SPI_CADENCE is not set
# CONFIG_SPI_DESIGNWARE is not set
CONFIG_SPI_GPIO=y
CONFIG_SPI_FSL_LIB=y
CONFIG_SPI_FSL_CPM=y
CONFIG_SPI_FSL_SPI=y
CONFIG_SPI_FSL_ESPI=y
# CONFIG_SPI_OC_TINY is not set
# CONFIG_SPI_PXA2XX is not set
# CONFIG_SPI_ROCKCHIP is not set
# CONFIG_SPI_SC18IS602 is not set
# CONFIG_SPI_MXIC is not set
# CONFIG_SPI_XCOMM is not set
# CONFIG_SPI_XILINX is not set
# CONFIG_SPI_ZYNQMP_GQSPI is not set

#
# SPI Protocol Masters
#
# CONFIG_SPI_SPIDEV is not set
# CONFIG_SPI_LOOPBACK_TEST is not set
# CONFIG_SPI_TLE62X0 is not set
# CONFIG_SPI_SLAVE is not set
# CONFIG_SPMI is not set
# CONFIG_HSI is not set
CONFIG_PPS=y
# CONFIG_PPS_DEBUG is not set

#
# PPS clients support
#
# CONFIG_PPS_CLIENT_KTIMER is not set
# CONFIG_PPS_CLIENT_LDISC is not set
# CONFIG_PPS_CLIENT_GPIO is not set

#
# PPS generators support
#

#
# PTP clock support
#
CONFIG_PTP_1588_CLOCK=y

#
# Enable PHYLIB and NETWORK_PHY_TIMESTAMPING to see the additional clocks.
#
# CONFIG_PINCTRL is not set
CONFIG_GPIOLIB=y
CONFIG_GPIOLIB_FASTPATH_LIMIT=512
CONFIG_OF_GPIO=y
# CONFIG_DEBUG_GPIO is not set
CONFIG_GPIO_SYSFS=y
CONFIG_GPIO_GENERIC=y

#
# Memory mapped GPIO drivers
#
# CONFIG_GPIO_74XX_MMIO is not set
# CONFIG_GPIO_ALTERA is not set
# CONFIG_GPIO_CADENCE is not set
# CONFIG_GPIO_DWAPB is not set
# CONFIG_GPIO_EXAR is not set
# CONFIG_GPIO_FTGPIO010 is not set
# CONFIG_GPIO_GENERIC_PLATFORM is not set
# CONFIG_GPIO_GRGPIO is not set
# CONFIG_GPIO_HLWD is not set
# CONFIG_GPIO_MB86S7X is not set
# CONFIG_GPIO_MOCKUP is not set
CONFIG_GPIO_MPC8XXX=y
# CONFIG_GPIO_XILINX is not set

#
# I2C GPIO expanders
#
# CONFIG_GPIO_ADP5588 is not set
# CONFIG_GPIO_ADNP is not set
# CONFIG_GPIO_MAX7300 is not set
# CONFIG_GPIO_MAX732X is not set
# CONFIG_GPIO_PCA953X is not set
# CONFIG_GPIO_PCF857X is not set
# CONFIG_GPIO_TPIC2810 is not set

#
# MFD GPIO expanders
#

#
# PCI GPIO expanders
#
# CONFIG_GPIO_BT8XX is not set
# CONFIG_GPIO_PCI_IDIO_16 is not set
# CONFIG_GPIO_PCIE_IDIO_24 is not set
# CONFIG_GPIO_RDC321X is not set

#
# SPI GPIO expanders
#
# CONFIG_GPIO_74X164 is not set
# CONFIG_GPIO_MAX3191X is not set
# CONFIG_GPIO_MAX7301 is not set
# CONFIG_GPIO_MC33880 is not set
# CONFIG_GPIO_PISOSR is not set
# CONFIG_GPIO_XRA1403 is not set

#
# USB GPIO expanders
#
# CONFIG_W1 is not set
# CONFIG_POWER_AVS is not set
# CONFIG_POWER_RESET is not set
# CONFIG_POWER_SUPPLY is not set
CONFIG_HWMON=y
CONFIG_HWMON_VID=y
# CONFIG_HWMON_DEBUG_CHIP is not set

#
# Native drivers
#
# CONFIG_SENSORS_AD7314 is not set
# CONFIG_SENSORS_AD7414 is not set
# CONFIG_SENSORS_AD7418 is not set
# CONFIG_SENSORS_ADM1021 is not set
# CONFIG_SENSORS_ADM1025 is not set
# CONFIG_SENSORS_ADM1026 is not set
# CONFIG_SENSORS_ADM1029 is not set
# CONFIG_SENSORS_ADM1031 is not set
# CONFIG_SENSORS_ADM9240 is not set
# CONFIG_SENSORS_ADT7310 is not set
# CONFIG_SENSORS_ADT7410 is not set
# CONFIG_SENSORS_ADT7411 is not set
# CONFIG_SENSORS_ADT7462 is not set
# CONFIG_SENSORS_ADT7470 is not set
# CONFIG_SENSORS_ADT7475 is not set
# CONFIG_SENSORS_ASC7621 is not set
# CONFIG_SENSORS_ASPEED is not set
# CONFIG_SENSORS_ATXP1 is not set
# CONFIG_SENSORS_DS620 is not set
# CONFIG_SENSORS_DS1621 is not set
# CONFIG_SENSORS_I5K_AMB is not set
# CONFIG_SENSORS_F75375S is not set
# CONFIG_SENSORS_GL518SM is not set
# CONFIG_SENSORS_GL520SM is not set
# CONFIG_SENSORS_G760A is not set
# CONFIG_SENSORS_G762 is not set
# CONFIG_SENSORS_GPIO_FAN is not set
# CONFIG_SENSORS_HIH6130 is not set
# CONFIG_SENSORS_JC42 is not set
# CONFIG_SENSORS_POWR1220 is not set
# CONFIG_SENSORS_LINEAGE is not set
# CONFIG_SENSORS_LTC2945 is not set
# CONFIG_SENSORS_LTC2990 is not set
# CONFIG_SENSORS_LTC4151 is not set
# CONFIG_SENSORS_LTC4215 is not set
# CONFIG_SENSORS_LTC4222 is not set
# CONFIG_SENSORS_LTC4245 is not set
# CONFIG_SENSORS_LTC4260 is not set
# CONFIG_SENSORS_LTC4261 is not set
# CONFIG_SENSORS_MAX1111 is not set
# CONFIG_SENSORS_MAX16065 is not set
# CONFIG_SENSORS_MAX1619 is not set
# CONFIG_SENSORS_MAX1668 is not set
# CONFIG_SENSORS_MAX197 is not set
# CONFIG_SENSORS_MAX31722 is not set
# CONFIG_SENSORS_MAX6621 is not set
# CONFIG_SENSORS_MAX6639 is not set
# CONFIG_SENSORS_MAX6642 is not set
# CONFIG_SENSORS_MAX6650 is not set
# CONFIG_SENSORS_MAX6697 is not set
# CONFIG_SENSORS_MAX31790 is not set
# CONFIG_SENSORS_MCP3021 is not set
# CONFIG_SENSORS_TC654 is not set
# CONFIG_SENSORS_ADCXX is not set
# CONFIG_SENSORS_LM63 is not set
# CONFIG_SENSORS_LM70 is not set
# CONFIG_SENSORS_LM73 is not set
# CONFIG_SENSORS_LM75 is not set
# CONFIG_SENSORS_LM77 is not set
# CONFIG_SENSORS_LM78 is not set
# CONFIG_SENSORS_LM80 is not set
# CONFIG_SENSORS_LM83 is not set
# CONFIG_SENSORS_LM85 is not set
# CONFIG_SENSORS_LM87 is not set
CONFIG_SENSORS_LM90=y
# CONFIG_SENSORS_LM92 is not set
# CONFIG_SENSORS_LM93 is not set
# CONFIG_SENSORS_LM95234 is not set
# CONFIG_SENSORS_LM95241 is not set
# CONFIG_SENSORS_LM95245 is not set
# CONFIG_SENSORS_NTC_THERMISTOR is not set
# CONFIG_SENSORS_NCT7802 is not set
# CONFIG_SENSORS_NCT7904 is not set
# CONFIG_SENSORS_NPCM7XX is not set
# CONFIG_SENSORS_OCC_P8_I2C is not set
# CONFIG_SENSORS_PCF8591 is not set
# CONFIG_PMBUS is not set
# CONFIG_SENSORS_SHT15 is not set
# CONFIG_SENSORS_SHT21 is not set
# CONFIG_SENSORS_SHT3x is not set
# CONFIG_SENSORS_SHTC1 is not set
# CONFIG_SENSORS_SIS5595 is not set
# CONFIG_SENSORS_EMC1403 is not set
# CONFIG_SENSORS_EMC2103 is not set
# CONFIG_SENSORS_EMC6W201 is not set
# CONFIG_SENSORS_SMSC47M192 is not set
# CONFIG_SENSORS_STTS751 is not set
# CONFIG_SENSORS_SMM665 is not set
# CONFIG_SENSORS_ADC128D818 is not set
# CONFIG_SENSORS_ADS1015 is not set
# CONFIG_SENSORS_ADS7828 is not set
# CONFIG_SENSORS_ADS7871 is not set
# CONFIG_SENSORS_AMC6821 is not set
# CONFIG_SENSORS_INA209 is not set
CONFIG_SENSORS_INA2XX=y
# CONFIG_SENSORS_INA3221 is not set
# CONFIG_SENSORS_TC74 is not set
# CONFIG_SENSORS_THMC50 is not set
# CONFIG_SENSORS_TMP102 is not set
# CONFIG_SENSORS_TMP103 is not set
# CONFIG_SENSORS_TMP108 is not set
# CONFIG_SENSORS_TMP401 is not set
# CONFIG_SENSORS_TMP421 is not set
# CONFIG_SENSORS_VIA686A is not set
# CONFIG_SENSORS_VT8231 is not set
# CONFIG_SENSORS_W83773G is not set
# CONFIG_SENSORS_W83781D is not set
# CONFIG_SENSORS_W83791D is not set
# CONFIG_SENSORS_W83792D is not set
CONFIG_SENSORS_W83793=y
# CONFIG_SENSORS_W83795 is not set
# CONFIG_SENSORS_W83L785TS is not set
# CONFIG_SENSORS_W83L786NG is not set
# CONFIG_THERMAL is not set
# CONFIG_WATCHDOG is not set
CONFIG_SSB_POSSIBLE=y
# CONFIG_SSB is not set
CONFIG_BCMA_POSSIBLE=y
# CONFIG_BCMA is not set

#
# Multifunction device drivers
#
# CONFIG_MFD_ACT8945A is not set
# CONFIG_MFD_AS3711 is not set
# CONFIG_MFD_AS3722 is not set
# CONFIG_PMIC_ADP5520 is not set
# CONFIG_MFD_AAT2870_CORE is not set
# CONFIG_MFD_AT91_USART is not set
# CONFIG_MFD_ATMEL_FLEXCOM is not set
# CONFIG_MFD_ATMEL_HLCDC is not set
# CONFIG_MFD_BCM590XX is not set
# CONFIG_MFD_BD9571MWV is not set
# CONFIG_MFD_AXP20X_I2C is not set
# CONFIG_MFD_MADERA is not set
# CONFIG_PMIC_DA903X is not set
# CONFIG_MFD_DA9052_SPI is not set
# CONFIG_MFD_DA9052_I2C is not set
# CONFIG_MFD_DA9055 is not set
# CONFIG_MFD_DA9062 is not set
# CONFIG_MFD_DA9063 is not set
# CONFIG_MFD_DA9150 is not set
# CONFIG_MFD_DLN2 is not set
# CONFIG_MFD_MC13XXX_SPI is not set
# CONFIG_MFD_MC13XXX_I2C is not set
# CONFIG_MFD_HI6421_PMIC is not set
# CONFIG_HTC_PASIC3 is not set
# CONFIG_HTC_I2CPLD is not set
# CONFIG_LPC_ICH is not set
# CONFIG_LPC_SCH is not set
# CONFIG_MFD_JANZ_CMODIO is not set
# CONFIG_MFD_KEMPLD is not set
# CONFIG_MFD_88PM800 is not set
# CONFIG_MFD_88PM805 is not set
# CONFIG_MFD_88PM860X is not set
# CONFIG_MFD_MAX14577 is not set
# CONFIG_MFD_MAX77620 is not set
# CONFIG_MFD_MAX77686 is not set
# CONFIG_MFD_MAX77693 is not set
# CONFIG_MFD_MAX77843 is not set
# CONFIG_MFD_MAX8907 is not set
# CONFIG_MFD_MAX8925 is not set
# CONFIG_MFD_MAX8997 is not set
# CONFIG_MFD_MAX8998 is not set
# CONFIG_MFD_MT6397 is not set
# CONFIG_MFD_MENF21BMC is not set
# CONFIG_EZX_PCAP is not set
# CONFIG_MFD_CPCAP is not set
# CONFIG_MFD_VIPERBOARD is not set
# CONFIG_MFD_RETU is not set
# CONFIG_MFD_PCF50633 is not set
# CONFIG_MFD_RDC321X is not set
# CONFIG_MFD_RT5033 is not set
# CONFIG_MFD_RC5T583 is not set
# CONFIG_MFD_RK808 is not set
# CONFIG_MFD_RN5T618 is not set
# CONFIG_MFD_SEC_CORE is not set
# CONFIG_MFD_SI476X_CORE is not set
# CONFIG_MFD_SM501 is not set
# CONFIG_MFD_SKY81452 is not set
# CONFIG_MFD_SMSC is not set
# CONFIG_ABX500_CORE is not set
# CONFIG_MFD_STMPE is not set
# CONFIG_MFD_SYSCON is not set
# CONFIG_MFD_TI_AM335X_TSCADC is not set
# CONFIG_MFD_LP3943 is not set
# CONFIG_MFD_LP8788 is not set
# CONFIG_MFD_TI_LMU is not set
# CONFIG_MFD_PALMAS is not set
# CONFIG_TPS6105X is not set
# CONFIG_TPS65010 is not set
# CONFIG_TPS6507X is not set
# CONFIG_MFD_TPS65086 is not set
# CONFIG_MFD_TPS65090 is not set
# CONFIG_MFD_TPS65217 is not set
# CONFIG_MFD_TI_LP873X is not set
# CONFIG_MFD_TI_LP87565 is not set
# CONFIG_MFD_TPS65218 is not set
# CONFIG_MFD_TPS6586X is not set
# CONFIG_MFD_TPS65910 is not set
# CONFIG_MFD_TPS65912_I2C is not set
# CONFIG_MFD_TPS65912_SPI is not set
# CONFIG_MFD_TPS80031 is not set
# CONFIG_TWL4030_CORE is not set
# CONFIG_TWL6040_CORE is not set
# CONFIG_MFD_WL1273_CORE is not set
# CONFIG_MFD_LM3533 is not set
# CONFIG_MFD_TC3589X is not set
# CONFIG_MFD_VX855 is not set
# CONFIG_MFD_ARIZONA_I2C is not set
# CONFIG_MFD_ARIZONA_SPI is not set
# CONFIG_MFD_WM8400 is not set
# CONFIG_MFD_WM831X_I2C is not set
# CONFIG_MFD_WM831X_SPI is not set
# CONFIG_MFD_WM8350_I2C is not set
# CONFIG_MFD_WM8994 is not set
# CONFIG_MFD_ROHM_BD718XX is not set
# CONFIG_REGULATOR is not set
# CONFIG_RC_CORE is not set
# CONFIG_MEDIA_SUPPORT is not set

#
# Graphics support
#
# CONFIG_AGP is not set
CONFIG_VGA_ARB=y
CONFIG_VGA_ARB_MAX_GPUS=16
# CONFIG_DRM is not set
# CONFIG_DRM_DP_CEC is not set

#
# ACP (Audio CoProcessor) Configuration
#

#
# AMD Library routines
#

#
# Frame buffer Devices
#
# CONFIG_FB is not set
# CONFIG_BACKLIGHT_LCD_SUPPORT is not set

#
# Console display driver support
#
CONFIG_VGA_CONSOLE=y
# CONFIG_VGACON_SOFT_SCROLLBACK is not set
CONFIG_DUMMY_CONSOLE=y
CONFIG_DUMMY_CONSOLE_COLUMNS=80
CONFIG_DUMMY_CONSOLE_ROWS=25
# CONFIG_SOUND is not set

#
# HID support
#
CONFIG_HID=y
# CONFIG_HID_BATTERY_STRENGTH is not set
# CONFIG_HIDRAW is not set
# CONFIG_UHID is not set
CONFIG_HID_GENERIC=y

#
# Special HID drivers
#
# CONFIG_HID_A4TECH is not set
# CONFIG_HID_ACCUTOUCH is not set
# CONFIG_HID_ACRUX is not set
# CONFIG_HID_APPLE is not set
# CONFIG_HID_APPLEIR is not set
# CONFIG_HID_AUREAL is not set
# CONFIG_HID_BELKIN is not set
# CONFIG_HID_BETOP_FF is not set
# CONFIG_HID_CHERRY is not set
# CONFIG_HID_CHICONY is not set
# CONFIG_HID_COUGAR is not set
# CONFIG_HID_CMEDIA is not set
# CONFIG_HID_CYPRESS is not set
# CONFIG_HID_DRAGONRISE is not set
# CONFIG_HID_EMS_FF is not set
# CONFIG_HID_ELECOM is not set
# CONFIG_HID_ELO is not set
# CONFIG_HID_EZKEY is not set
# CONFIG_HID_GEMBIRD is not set
# CONFIG_HID_GFRM is not set
# CONFIG_HID_HOLTEK is not set
# CONFIG_HID_KEYTOUCH is not set
# CONFIG_HID_KYE is not set
# CONFIG_HID_UCLOGIC is not set
# CONFIG_HID_WALTOP is not set
# CONFIG_HID_GYRATION is not set
# CONFIG_HID_ICADE is not set
# CONFIG_HID_ITE is not set
# CONFIG_HID_JABRA is not set
# CONFIG_HID_TWINHAN is not set
# CONFIG_HID_KENSINGTON is not set
# CONFIG_HID_LCPOWER is not set
# CONFIG_HID_LENOVO is not set
# CONFIG_HID_LOGITECH is not set
# CONFIG_HID_MAGICMOUSE is not set
# CONFIG_HID_MAYFLASH is not set
# CONFIG_HID_REDRAGON is not set
# CONFIG_HID_MICROSOFT is not set
# CONFIG_HID_MONTEREY is not set
# CONFIG_HID_MULTITOUCH is not set
# CONFIG_HID_NTI is not set
# CONFIG_HID_NTRIG is not set
# CONFIG_HID_ORTEK is not set
# CONFIG_HID_PANTHERLORD is not set
# CONFIG_HID_PENMOUNT is not set
# CONFIG_HID_PETALYNX is not set
# CONFIG_HID_PICOLCD is not set
# CONFIG_HID_PLANTRONICS is not set
# CONFIG_HID_PRIMAX is not set
# CONFIG_HID_RETRODE is not set
# CONFIG_HID_ROCCAT is not set
# CONFIG_HID_SAITEK is not set
# CONFIG_HID_SAMSUNG is not set
# CONFIG_HID_SPEEDLINK is not set
# CONFIG_HID_STEAM is not set
# CONFIG_HID_STEELSERIES is not set
# CONFIG_HID_SUNPLUS is not set
# CONFIG_HID_RMI is not set
# CONFIG_HID_GREENASIA is not set
# CONFIG_HID_SMARTJOYPLUS is not set
# CONFIG_HID_TIVO is not set
# CONFIG_HID_TOPSEED is not set
# CONFIG_HID_THRUSTMASTER is not set
# CONFIG_HID_UDRAW_PS3 is not set
# CONFIG_HID_WACOM is not set
# CONFIG_HID_XINMO is not set
# CONFIG_HID_ZEROPLUS is not set
# CONFIG_HID_ZYDACRON is not set
# CONFIG_HID_SENSOR_HUB is not set
# CONFIG_HID_ALPS is not set

#
# USB HID support
#
CONFIG_USB_HID=y
# CONFIG_HID_PID is not set
# CONFIG_USB_HIDDEV is not set

#
# I2C HID support
#
# CONFIG_I2C_HID is not set
CONFIG_USB_OHCI_LITTLE_ENDIAN=y
CONFIG_USB_SUPPORT=y
CONFIG_USB_COMMON=y
CONFIG_USB_ARCH_HAS_HCD=y
CONFIG_USB=y
CONFIG_USB_PCI=y
# CONFIG_USB_ANNOUNCE_NEW_DEVICES is not set

#
# Miscellaneous USB options
#
CONFIG_USB_DEFAULT_PERSIST=y
# CONFIG_USB_DYNAMIC_MINORS is not set
# CONFIG_USB_OTG_WHITELIST is not set
# CONFIG_USB_OTG_BLACKLIST_HUB is not set
# CONFIG_USB_MON is not set
# CONFIG_USB_WUSB_CBAF is not set

#
# USB Host Controller Drivers
#
# CONFIG_USB_C67X00_HCD is not set
# CONFIG_USB_XHCI_HCD is not set
CONFIG_USB_EHCI_HCD=y
CONFIG_USB_EHCI_ROOT_HUB_TT=y
CONFIG_USB_EHCI_TT_NEWSCHED=y
CONFIG_USB_EHCI_PCI=y
CONFIG_USB_EHCI_FSL=y
CONFIG_USB_EHCI_HCD_PPC_OF=y
# CONFIG_USB_EHCI_HCD_PLATFORM is not set
# CONFIG_USB_OXU210HP_HCD is not set
# CONFIG_USB_ISP116X_HCD is not set
# CONFIG_USB_FOTG210_HCD is not set
# CONFIG_USB_MAX3421_HCD is not set
# CONFIG_USB_OHCI_HCD is not set
# CONFIG_USB_UHCI_HCD is not set
# CONFIG_USB_SL811_HCD is not set
# CONFIG_USB_R8A66597_HCD is not set
# CONFIG_USB_HCD_TEST_MODE is not set

#
# USB Device Class drivers
#
# CONFIG_USB_ACM is not set
# CONFIG_USB_PRINTER is not set
# CONFIG_USB_WDM is not set
# CONFIG_USB_TMC is not set

#
# NOTE: USB_STORAGE depends on SCSI but BLK_DEV_SD may
#

#
# also be needed; see USB_STORAGE Help for more info
#
CONFIG_USB_STORAGE=y
# CONFIG_USB_STORAGE_DEBUG is not set
# CONFIG_USB_STORAGE_REALTEK is not set
# CONFIG_USB_STORAGE_DATAFAB is not set
# CONFIG_USB_STORAGE_FREECOM is not set
# CONFIG_USB_STORAGE_ISD200 is not set
# CONFIG_USB_STORAGE_USBAT is not set
# CONFIG_USB_STORAGE_SDDR09 is not set
# CONFIG_USB_STORAGE_SDDR55 is not set
# CONFIG_USB_STORAGE_JUMPSHOT is not set
# CONFIG_USB_STORAGE_ALAUDA is not set
# CONFIG_USB_STORAGE_ONETOUCH is not set
# CONFIG_USB_STORAGE_KARMA is not set
# CONFIG_USB_STORAGE_CYPRESS_ATACB is not set
# CONFIG_USB_STORAGE_ENE_UB6250 is not set
# CONFIG_USB_UAS is not set

#
# USB Imaging devices
#
# CONFIG_USB_MDC800 is not set
# CONFIG_USB_MICROTEK is not set
# CONFIG_USBIP_CORE is not set
# CONFIG_USB_MUSB_HDRC is not set
# CONFIG_USB_DWC3 is not set
# CONFIG_USB_DWC2 is not set
# CONFIG_USB_CHIPIDEA is not set
# CONFIG_USB_ISP1760 is not set

#
# USB port drivers
#
# CONFIG_USB_SERIAL is not set

#
# USB Miscellaneous drivers
#
# CONFIG_USB_EMI62 is not set
# CONFIG_USB_EMI26 is not set
# CONFIG_USB_ADUTUX is not set
# CONFIG_USB_SEVSEG is not set
# CONFIG_USB_RIO500 is not set
# CONFIG_USB_LEGOTOWER is not set
# CONFIG_USB_LCD is not set
# CONFIG_USB_CYPRESS_CY7C63 is not set
# CONFIG_USB_CYTHERM is not set
# CONFIG_USB_IDMOUSE is not set
# CONFIG_USB_FTDI_ELAN is not set
# CONFIG_USB_APPLEDISPLAY is not set
# CONFIG_USB_SISUSBVGA is not set
# CONFIG_USB_LD is not set
# CONFIG_USB_TRANCEVIBRATOR is not set
# CONFIG_USB_IOWARRIOR is not set
# CONFIG_USB_TEST is not set
# CONFIG_USB_EHSET_TEST_FIXTURE is not set
# CONFIG_USB_ISIGHTFW is not set
# CONFIG_USB_YUREX is not set
# CONFIG_USB_EZUSB_FX2 is not set
# CONFIG_USB_HUB_USB251XB is not set
# CONFIG_USB_HSIC_USB3503 is not set
# CONFIG_USB_HSIC_USB4604 is not set
# CONFIG_USB_LINK_LAYER_TEST is not set
# CONFIG_USB_CHAOSKEY is not set

#
# USB Physical Layer drivers
#
# CONFIG_NOP_USB_XCEIV is not set
# CONFIG_USB_GPIO_VBUS is not set
# CONFIG_USB_ISP1301 is not set
# CONFIG_USB_GADGET is not set
# CONFIG_TYPEC is not set
# CONFIG_USB_ROLE_SWITCH is not set
# CONFIG_USB_ULPI_BUS is not set
# CONFIG_UWB is not set
CONFIG_MMC=y
CONFIG_PWRSEQ_EMMC=y
CONFIG_PWRSEQ_SIMPLE=y
CONFIG_MMC_BLOCK=y
CONFIG_MMC_BLOCK_MINORS=8
# CONFIG_SDIO_UART is not set
# CONFIG_MMC_TEST is not set

#
# MMC/SD/SDIO Host Controller Drivers
#
# CONFIG_MMC_DEBUG is not set
CONFIG_MMC_SDHCI=y
CONFIG_MMC_SDHCI_IO_ACCESSORS=y
# CONFIG_MMC_SDHCI_PCI is not set
CONFIG_MMC_SDHCI_PLTFM=y
# CONFIG_MMC_SDHCI_OF_ARASAN is not set
# CONFIG_MMC_SDHCI_OF_AT91 is not set
CONFIG_MMC_SDHCI_OF_ESDHC=y
# CONFIG_MMC_SDHCI_OF_HLWD is not set
# CONFIG_MMC_SDHCI_OF_DWCMSHC is not set
# CONFIG_MMC_SDHCI_CADENCE is not set
# CONFIG_MMC_SDHCI_F_SDH30 is not set
# CONFIG_MMC_WBSD is not set
# CONFIG_MMC_TIFM_SD is not set
# CONFIG_MMC_SPI is not set
# CONFIG_MMC_CB710 is not set
# CONFIG_MMC_VIA_SDMMC is not set
# CONFIG_MMC_VUB300 is not set
# CONFIG_MMC_USHC is not set
# CONFIG_MMC_USDHI6ROL0 is not set
# CONFIG_MMC_CQHCI is not set
# CONFIG_MMC_TOSHIBA_PCI is not set
# CONFIG_MMC_MTK is not set
# CONFIG_MMC_SDHCI_XENON is not set
# CONFIG_MMC_SDHCI_OMAP is not set
# CONFIG_MMC_SDHCI_AM654 is not set
# CONFIG_MEMSTICK is not set
# CONFIG_NEW_LEDS is not set
# CONFIG_ACCESSIBILITY is not set
# CONFIG_INFINIBAND is not set
CONFIG_EDAC_ATOMIC_SCRUB=y
CONFIG_EDAC_SUPPORT=y
CONFIG_EDAC=y
CONFIG_EDAC_LEGACY_SYSFS=y
# CONFIG_EDAC_DEBUG is not set
CONFIG_EDAC_MPC85XX=y
# CONFIG_EDAC_CPC925 is not set
CONFIG_RTC_LIB=y
CONFIG_RTC_MC146818_LIB=y
CONFIG_RTC_CLASS=y
CONFIG_RTC_HCTOSYS=y
CONFIG_RTC_HCTOSYS_DEVICE="rtc0"
CONFIG_RTC_SYSTOHC=y
CONFIG_RTC_SYSTOHC_DEVICE="rtc0"
# CONFIG_RTC_DEBUG is not set
CONFIG_RTC_NVMEM=y

#
# RTC interfaces
#
CONFIG_RTC_INTF_SYSFS=y
CONFIG_RTC_INTF_PROC=y
CONFIG_RTC_INTF_DEV=y
# CONFIG_RTC_INTF_DEV_UIE_EMUL is not set
# CONFIG_RTC_DRV_TEST is not set

#
# I2C RTC drivers
#
# CONFIG_RTC_DRV_ABB5ZES3 is not set
# CONFIG_RTC_DRV_ABX80X is not set
CONFIG_RTC_DRV_DS1307=y
# CONFIG_RTC_DRV_DS1307_CENTURY is not set
CONFIG_RTC_DRV_DS1374=y
# CONFIG_RTC_DRV_DS1374_WDT is not set
# CONFIG_RTC_DRV_DS1672 is not set
# CONFIG_RTC_DRV_HYM8563 is not set
# CONFIG_RTC_DRV_MAX6900 is not set
# CONFIG_RTC_DRV_RS5C372 is not set
# CONFIG_RTC_DRV_ISL1208 is not set
# CONFIG_RTC_DRV_ISL12022 is not set
# CONFIG_RTC_DRV_ISL12026 is not set
# CONFIG_RTC_DRV_X1205 is not set
# CONFIG_RTC_DRV_PCF8523 is not set
# CONFIG_RTC_DRV_PCF85063 is not set
# CONFIG_RTC_DRV_PCF85363 is not set
# CONFIG_RTC_DRV_PCF8563 is not set
# CONFIG_RTC_DRV_PCF8583 is not set
# CONFIG_RTC_DRV_M41T80 is not set
# CONFIG_RTC_DRV_BQ32K is not set
# CONFIG_RTC_DRV_S35390A is not set
# CONFIG_RTC_DRV_FM3130 is not set
# CONFIG_RTC_DRV_RX8010 is not set
# CONFIG_RTC_DRV_RX8581 is not set
# CONFIG_RTC_DRV_RX8025 is not set
# CONFIG_RTC_DRV_EM3027 is not set
# CONFIG_RTC_DRV_RV8803 is not set

#
# SPI RTC drivers
#
# CONFIG_RTC_DRV_M41T93 is not set
# CONFIG_RTC_DRV_M41T94 is not set
# CONFIG_RTC_DRV_DS1302 is not set
# CONFIG_RTC_DRV_DS1305 is not set
# CONFIG_RTC_DRV_DS1343 is not set
# CONFIG_RTC_DRV_DS1347 is not set
# CONFIG_RTC_DRV_DS1390 is not set
# CONFIG_RTC_DRV_MAX6916 is not set
# CONFIG_RTC_DRV_R9701 is not set
# CONFIG_RTC_DRV_RX4581 is not set
# CONFIG_RTC_DRV_RX6110 is not set
# CONFIG_RTC_DRV_RS5C348 is not set
# CONFIG_RTC_DRV_MAX6902 is not set
# CONFIG_RTC_DRV_PCF2123 is not set
# CONFIG_RTC_DRV_MCP795 is not set
CONFIG_RTC_I2C_AND_SPI=y

#
# SPI and I2C RTC drivers
#
CONFIG_RTC_DRV_DS3232=y
CONFIG_RTC_DRV_DS3232_HWMON=y
# CONFIG_RTC_DRV_PCF2127 is not set
# CONFIG_RTC_DRV_RV3029C2 is not set

#
# Platform RTC drivers
#
CONFIG_RTC_DRV_CMOS=y
# CONFIG_RTC_DRV_DS1286 is not set
# CONFIG_RTC_DRV_DS1511 is not set
# CONFIG_RTC_DRV_DS1553 is not set
# CONFIG_RTC_DRV_DS1685_FAMILY is not set
# CONFIG_RTC_DRV_DS1742 is not set
# CONFIG_RTC_DRV_DS2404 is not set
# CONFIG_RTC_DRV_STK17TA8 is not set
# CONFIG_RTC_DRV_M48T86 is not set
# CONFIG_RTC_DRV_M48T35 is not set
# CONFIG_RTC_DRV_M48T59 is not set
# CONFIG_RTC_DRV_MSM6242 is not set
# CONFIG_RTC_DRV_BQ4802 is not set
# CONFIG_RTC_DRV_RP5C01 is not set
# CONFIG_RTC_DRV_V3020 is not set
# CONFIG_RTC_DRV_ZYNQMP is not set

#
# on-CPU RTC drivers
#
# CONFIG_RTC_DRV_GENERIC is not set
# CONFIG_RTC_DRV_FTRTC010 is not set
# CONFIG_RTC_DRV_SNVS is not set
# CONFIG_RTC_DRV_R7301 is not set

#
# HID Sensor RTC drivers
#
# CONFIG_RTC_DRV_HID_SENSOR_TIME is not set
CONFIG_DMADEVICES=y
# CONFIG_DMADEVICES_DEBUG is not set

#
# DMA Devices
#
CONFIG_DMA_ENGINE=y
CONFIG_DMA_OF=y
# CONFIG_ALTERA_MSGDMA is not set
# CONFIG_DW_AXI_DMAC is not set
# CONFIG_FSL_DMA is not set
# CONFIG_FSL_EDMA is not set
# CONFIG_FSL_RAID is not set
# CONFIG_INTEL_IDMA64 is not set
# CONFIG_QCOM_HIDMA_MGMT is not set
# CONFIG_QCOM_HIDMA is not set
# CONFIG_DW_DMAC is not set
# CONFIG_DW_DMAC_PCI is not set

#
# DMA Clients
#
# CONFIG_ASYNC_TX_DMA is not set
# CONFIG_DMATEST is not set

#
# DMABUF options
#
# CONFIG_SYNC_FILE is not set
# CONFIG_AUXDISPLAY is not set
CONFIG_UIO=y
# CONFIG_UIO_CIF is not set
# CONFIG_UIO_PDRV_GENIRQ is not set
# CONFIG_UIO_DMEM_GENIRQ is not set
# CONFIG_UIO_AEC is not set
# CONFIG_UIO_SERCOS3 is not set
# CONFIG_UIO_PCI_GENERIC is not set
# CONFIG_UIO_NETX is not set
# CONFIG_UIO_FSL_ELBC_GPCM is not set
# CONFIG_UIO_PRUSS is not set
# CONFIG_UIO_MF624 is not set
# CONFIG_VFIO is not set
CONFIG_IRQ_BYPASS_MANAGER=y
CONFIG_VIRT_DRIVERS=y
CONFIG_FSL_HV_MANAGER=y
CONFIG_VIRTIO_MENU=y
# CONFIG_VIRTIO_PCI is not set
# CONFIG_VIRTIO_MMIO is not set

#
# Microsoft Hyper-V guest support
#
CONFIG_STAGING=y
# CONFIG_COMEDI is not set
# CONFIG_RTL8192U is not set
# CONFIG_RTLLIB is not set
# CONFIG_R8712U is not set
# CONFIG_RTS5208 is not set

#
# Speakup console speech
#
# CONFIG_SPEAKUP is not set
# CONFIG_STAGING_MEDIA is not set

#
# Android
#
# CONFIG_STAGING_BOARD is not set
# CONFIG_LTE_GDM724X is not set
# CONFIG_GS_FPGABOOT is not set
# CONFIG_UNISYSSPAR is not set
# CONFIG_COMMON_CLK_XLNX_CLKWZRD is not set
# CONFIG_MOST is not set
# CONFIG_KS7010 is not set
# CONFIG_GREYBUS is not set
# CONFIG_PI433 is not set
# CONFIG_MTK_MMC is not set

#
# Gasket devices
#
# CONFIG_XIL_AXIS_FIFO is not set
# CONFIG_EROFS_FS is not set
CONFIG_CLKDEV_LOOKUP=y
CONFIG_HAVE_CLK_PREPARE=y
CONFIG_COMMON_CLK=y

#
# Common Clock Framework
#
# CONFIG_CLK_HSDK is not set
# CONFIG_COMMON_CLK_MAX9485 is not set
# CONFIG_COMMON_CLK_SI5351 is not set
# CONFIG_COMMON_CLK_SI514 is not set
# CONFIG_COMMON_CLK_SI544 is not set
# CONFIG_COMMON_CLK_SI570 is not set
# CONFIG_COMMON_CLK_CDCE706 is not set
# CONFIG_COMMON_CLK_CDCE925 is not set
# CONFIG_COMMON_CLK_CS2000_CP is not set
CONFIG_CLK_QORIQ=y
# CONFIG_COMMON_CLK_VC5 is not set
# CONFIG_HWSPINLOCK is not set

#
# Clock Source drivers
#
# CONFIG_MAILBOX is not set
CONFIG_IOMMU_API=y
CONFIG_IOMMU_SUPPORT=y

#
# Generic IOMMU Pagetable Support
#
# CONFIG_IOMMU_DEBUGFS is not set
# CONFIG_IOMMU_DEFAULT_PASSTHROUGH is not set
CONFIG_OF_IOMMU=y
CONFIG_FSL_PAMU=y

#
# Remoteproc drivers
#
# CONFIG_REMOTEPROC is not set

#
# Rpmsg drivers
#
# CONFIG_RPMSG_VIRTIO is not set
# CONFIG_SOUNDWIRE is not set

#
# SOC (System On Chip) specific Drivers
#

#
# Amlogic SoC drivers
#

#
# Broadcom SoC drivers
#

#
# NXP/Freescale QorIQ SoC drivers
#
# CONFIG_FSL_DPAA is not set
CONFIG_FSL_GUTS=y

#
# i.MX SoC drivers
#

#
# Qualcomm SoC drivers
#
# CONFIG_SOC_TI is not set

#
# Xilinx SoC drivers
#
# CONFIG_XILINX_VCU is not set
# CONFIG_PM_DEVFREQ is not set
# CONFIG_EXTCON is not set
CONFIG_MEMORY=y
# CONFIG_FSL_CORENET_CF is not set
CONFIG_FSL_IFC=y
# CONFIG_IIO is not set
# CONFIG_NTB is not set
# CONFIG_VME_BUS is not set
# CONFIG_PWM is not set

#
# IRQ chip support
#
CONFIG_IRQCHIP=y
CONFIG_ARM_GIC_MAX_NR=1
# CONFIG_IPACK_BUS is not set
# CONFIG_RESET_CONTROLLER is not set
# CONFIG_FMC is not set

#
# PHY Subsystem
#
# CONFIG_GENERIC_PHY is not set
# CONFIG_BCM_KONA_USB2_PHY is not set
# CONFIG_PHY_CADENCE_DP is not set
# CONFIG_PHY_FSL_IMX8MQ_USB is not set
# CONFIG_PHY_PXA_28NM_HSIC is not set
# CONFIG_PHY_PXA_28NM_USB2 is not set
# CONFIG_PHY_MAPPHONE_MDM6600 is not set
# CONFIG_POWERCAP is not set
# CONFIG_MCB is not set

#
# Performance monitor support
#
CONFIG_RAS=y

#
# Android
#
# CONFIG_ANDROID is not set
# CONFIG_LIBNVDIMM is not set
# CONFIG_DAX is not set
CONFIG_NVMEM=y

#
# HW tracing support
#
# CONFIG_STM is not set
# CONFIG_INTEL_TH is not set
# CONFIG_FPGA is not set
# CONFIG_FSI is not set
# CONFIG_SIOX is not set
# CONFIG_SLIMBUS is not set

#
# File systems
#
CONFIG_FS_IOMAP=y
CONFIG_EXT2_FS=y
# CONFIG_EXT2_FS_XATTR is not set
CONFIG_EXT3_FS=y
# CONFIG_EXT3_FS_POSIX_ACL is not set
# CONFIG_EXT3_FS_SECURITY is not set
CONFIG_EXT4_FS=y
# CONFIG_EXT4_FS_POSIX_ACL is not set
# CONFIG_EXT4_FS_SECURITY is not set
# CONFIG_EXT4_ENCRYPTION is not set
# CONFIG_EXT4_DEBUG is not set
CONFIG_JBD2=y
# CONFIG_JBD2_DEBUG is not set
CONFIG_FS_MBCACHE=y
# CONFIG_REISERFS_FS is not set
# CONFIG_JFS_FS is not set
# CONFIG_XFS_FS is not set
# CONFIG_GFS2_FS is not set
# CONFIG_BTRFS_FS is not set
# CONFIG_NILFS2_FS is not set
# CONFIG_F2FS_FS is not set
# CONFIG_FS_DAX is not set
CONFIG_EXPORTFS=m
# CONFIG_EXPORTFS_BLOCK_OPS is not set
CONFIG_FILE_LOCKING=y
CONFIG_MANDATORY_FILE_LOCKING=y
# CONFIG_FS_ENCRYPTION is not set
CONFIG_FSNOTIFY=y
CONFIG_DNOTIFY=y
CONFIG_INOTIFY_USER=y
# CONFIG_FANOTIFY is not set
# CONFIG_QUOTA is not set
# CONFIG_AUTOFS4_FS is not set
# CONFIG_AUTOFS_FS is not set
# CONFIG_FUSE_FS is not set
# CONFIG_OVERLAY_FS is not set

#
# Caches
#
# CONFIG_FSCACHE is not set

#
# CD-ROM/DVD Filesystems
#
CONFIG_ISO9660_FS=m
CONFIG_JOLIET=y
CONFIG_ZISOFS=y
CONFIG_UDF_FS=m

#
# DOS/FAT/NT Filesystems
#
CONFIG_FAT_FS=y
CONFIG_MSDOS_FS=m
CONFIG_VFAT_FS=y
CONFIG_FAT_DEFAULT_CODEPAGE=437
CONFIG_FAT_DEFAULT_IOCHARSET="iso8859-1"
# CONFIG_FAT_DEFAULT_UTF8 is not set
CONFIG_NTFS_FS=y
# CONFIG_NTFS_DEBUG is not set
# CONFIG_NTFS_RW is not set

#
# Pseudo filesystems
#
CONFIG_PROC_FS=y
CONFIG_PROC_KCORE=y
CONFIG_PROC_SYSCTL=y
CONFIG_PROC_PAGE_MONITOR=y
# CONFIG_PROC_CHILDREN is not set
CONFIG_KERNFS=y
CONFIG_SYSFS=y
CONFIG_TMPFS=y
# CONFIG_TMPFS_POSIX_ACL is not set
# CONFIG_TMPFS_XATTR is not set
CONFIG_HUGETLBFS=y
CONFIG_HUGETLB_PAGE=y
CONFIG_MEMFD_CREATE=y
# CONFIG_CONFIGFS_FS is not set
CONFIG_MISC_FILESYSTEMS=y
# CONFIG_ORANGEFS_FS is not set
# CONFIG_ADFS_FS is not set
# CONFIG_AFFS_FS is not set
# CONFIG_ECRYPT_FS is not set
# CONFIG_HFS_FS is not set
# CONFIG_HFSPLUS_FS is not set
# CONFIG_BEFS_FS is not set
# CONFIG_BFS_FS is not set
# CONFIG_EFS_FS is not set
CONFIG_JFFS2_FS=y
CONFIG_JFFS2_FS_DEBUG=0
CONFIG_JFFS2_FS_WRITEBUFFER=y
# CONFIG_JFFS2_FS_WBUF_VERIFY is not set
# CONFIG_JFFS2_SUMMARY is not set
# CONFIG_JFFS2_FS_XATTR is not set
# CONFIG_JFFS2_COMPRESSION_OPTIONS is not set
CONFIG_JFFS2_ZLIB=y
CONFIG_JFFS2_RTIME=y
CONFIG_CRAMFS=y
CONFIG_CRAMFS_BLOCKDEV=y
# CONFIG_CRAMFS_MTD is not set
# CONFIG_SQUASHFS is not set
# CONFIG_VXFS_FS is not set
# CONFIG_MINIX_FS is not set
# CONFIG_OMFS_FS is not set
# CONFIG_HPFS_FS is not set
# CONFIG_QNX4FS_FS is not set
# CONFIG_QNX6FS_FS is not set
# CONFIG_ROMFS_FS is not set
# CONFIG_PSTORE is not set
# CONFIG_SYSV_FS is not set
# CONFIG_UFS_FS is not set
CONFIG_NETWORK_FILESYSTEMS=y
CONFIG_NFS_FS=y
CONFIG_NFS_V2=y
CONFIG_NFS_V3=y
# CONFIG_NFS_V3_ACL is not set
CONFIG_NFS_V4=y
# CONFIG_NFS_SWAP is not set
# CONFIG_NFS_V4_1 is not set
CONFIG_ROOT_NFS=y
# CONFIG_NFS_USE_LEGACY_DNS is not set
CONFIG_NFS_USE_KERNEL_DNS=y
CONFIG_NFSD=m
# CONFIG_NFSD_V3 is not set
# CONFIG_NFSD_V4 is not set
CONFIG_GRACE_PERIOD=y
CONFIG_LOCKD=y
CONFIG_LOCKD_V4=y
CONFIG_NFS_COMMON=y
CONFIG_SUNRPC=y
CONFIG_SUNRPC_GSS=y
# CONFIG_SUNRPC_DEBUG is not set
# CONFIG_CEPH_FS is not set
# CONFIG_CIFS is not set
# CONFIG_CODA_FS is not set
# CONFIG_AFS_FS is not set
CONFIG_NLS=y
CONFIG_NLS_DEFAULT="iso8859-1"
CONFIG_NLS_CODEPAGE_437=y
# CONFIG_NLS_CODEPAGE_737 is not set
# CONFIG_NLS_CODEPAGE_775 is not set
CONFIG_NLS_CODEPAGE_850=y
# CONFIG_NLS_CODEPAGE_852 is not set
# CONFIG_NLS_CODEPAGE_855 is not set
# CONFIG_NLS_CODEPAGE_857 is not set
# CONFIG_NLS_CODEPAGE_860 is not set
# CONFIG_NLS_CODEPAGE_861 is not set
# CONFIG_NLS_CODEPAGE_862 is not set
# CONFIG_NLS_CODEPAGE_863 is not set
# CONFIG_NLS_CODEPAGE_864 is not set
# CONFIG_NLS_CODEPAGE_865 is not set
# CONFIG_NLS_CODEPAGE_866 is not set
# CONFIG_NLS_CODEPAGE_869 is not set
# CONFIG_NLS_CODEPAGE_936 is not set
# CONFIG_NLS_CODEPAGE_950 is not set
# CONFIG_NLS_CODEPAGE_932 is not set
# CONFIG_NLS_CODEPAGE_949 is not set
# CONFIG_NLS_CODEPAGE_874 is not set
# CONFIG_NLS_ISO8859_8 is not set
# CONFIG_NLS_CODEPAGE_1250 is not set
# CONFIG_NLS_CODEPAGE_1251 is not set
# CONFIG_NLS_ASCII is not set
CONFIG_NLS_ISO8859_1=y
# CONFIG_NLS_ISO8859_2 is not set
# CONFIG_NLS_ISO8859_3 is not set
# CONFIG_NLS_ISO8859_4 is not set
# CONFIG_NLS_ISO8859_5 is not set
# CONFIG_NLS_ISO8859_6 is not set
# CONFIG_NLS_ISO8859_7 is not set
# CONFIG_NLS_ISO8859_9 is not set
# CONFIG_NLS_ISO8859_13 is not set
# CONFIG_NLS_ISO8859_14 is not set
# CONFIG_NLS_ISO8859_15 is not set
# CONFIG_NLS_KOI8_R is not set
# CONFIG_NLS_KOI8_U is not set
# CONFIG_NLS_MAC_ROMAN is not set
# CONFIG_NLS_MAC_CELTIC is not set
# CONFIG_NLS_MAC_CENTEURO is not set
# CONFIG_NLS_MAC_CROATIAN is not set
# CONFIG_NLS_MAC_CYRILLIC is not set
# CONFIG_NLS_MAC_GAELIC is not set
# CONFIG_NLS_MAC_GREEK is not set
# CONFIG_NLS_MAC_ICELAND is not set
# CONFIG_NLS_MAC_INUIT is not set
# CONFIG_NLS_MAC_ROMANIAN is not set
# CONFIG_NLS_MAC_TURKISH is not set
CONFIG_NLS_UTF8=m

#
# Security options
#
CONFIG_KEYS=y
CONFIG_KEYS_COMPAT=y
# CONFIG_PERSISTENT_KEYRINGS is not set
# CONFIG_BIG_KEYS is not set
# CONFIG_ENCRYPTED_KEYS is not set
# CONFIG_KEY_DH_OPERATIONS is not set
# CONFIG_SECURITY_DMESG_RESTRICT is not set
# CONFIG_SECURITY is not set
# CONFIG_SECURITYFS is not set
CONFIG_HAVE_HARDENED_USERCOPY_ALLOCATOR=y
# CONFIG_HARDENED_USERCOPY is not set
# CONFIG_FORTIFY_SOURCE is not set
# CONFIG_STATIC_USERMODEHELPER is not set
CONFIG_DEFAULT_SECURITY_DAC=y
CONFIG_DEFAULT_SECURITY=""
CONFIG_CRYPTO=y

#
# Crypto core or helper
#
CONFIG_CRYPTO_ALGAPI=y
CONFIG_CRYPTO_ALGAPI2=y
CONFIG_CRYPTO_AEAD=y
CONFIG_CRYPTO_AEAD2=y
CONFIG_CRYPTO_BLKCIPHER=y
CONFIG_CRYPTO_BLKCIPHER2=y
CONFIG_CRYPTO_HASH=y
CONFIG_CRYPTO_HASH2=y
CONFIG_CRYPTO_RNG=y
CONFIG_CRYPTO_RNG2=y
CONFIG_CRYPTO_RNG_DEFAULT=y
CONFIG_CRYPTO_AKCIPHER2=y
CONFIG_CRYPTO_AKCIPHER=y
CONFIG_CRYPTO_KPP2=y
CONFIG_CRYPTO_ACOMP2=y
CONFIG_CRYPTO_RSA=y
# CONFIG_CRYPTO_DH is not set
# CONFIG_CRYPTO_ECDH is not set
CONFIG_CRYPTO_MANAGER=y
CONFIG_CRYPTO_MANAGER2=y
# CONFIG_CRYPTO_USER is not set
CONFIG_CRYPTO_MANAGER_DISABLE_TESTS=y
# CONFIG_CRYPTO_GF128MUL is not set
CONFIG_CRYPTO_NULL=y
CONFIG_CRYPTO_NULL2=y
# CONFIG_CRYPTO_PCRYPT is not set
CONFIG_CRYPTO_WORKQUEUE=y
# CONFIG_CRYPTO_CRYPTD is not set
CONFIG_CRYPTO_AUTHENC=y
# CONFIG_CRYPTO_TEST is not set

#
# Authenticated Encryption with Associated Data
#
# CONFIG_CRYPTO_CCM is not set
# CONFIG_CRYPTO_GCM is not set
# CONFIG_CRYPTO_CHACHA20POLY1305 is not set
# CONFIG_CRYPTO_AEGIS128 is not set
# CONFIG_CRYPTO_AEGIS128L is not set
# CONFIG_CRYPTO_AEGIS256 is not set
# CONFIG_CRYPTO_MORUS640 is not set
# CONFIG_CRYPTO_MORUS1280 is not set
# CONFIG_CRYPTO_SEQIV is not set
CONFIG_CRYPTO_ECHAINIV=y

#
# Block modes
#
CONFIG_CRYPTO_CBC=y
# CONFIG_CRYPTO_CFB is not set
# CONFIG_CRYPTO_CTR is not set
# CONFIG_CRYPTO_CTS is not set
# CONFIG_CRYPTO_ECB is not set
# CONFIG_CRYPTO_LRW is not set
# CONFIG_CRYPTO_OFB is not set
CONFIG_CRYPTO_PCBC=m
# CONFIG_CRYPTO_XTS is not set
# CONFIG_CRYPTO_KEYWRAP is not set
# CONFIG_CRYPTO_ADIANTUM is not set

#
# Hash modes
#
# CONFIG_CRYPTO_CMAC is not set
CONFIG_CRYPTO_HMAC=y
# CONFIG_CRYPTO_XCBC is not set
# CONFIG_CRYPTO_VMAC is not set

#
# Digest
#
CONFIG_CRYPTO_CRC32C=y
# CONFIG_CRYPTO_CRC32C_VPMSUM is not set
# CONFIG_CRYPTO_CRC32 is not set
# CONFIG_CRYPTO_CRCT10DIF is not set
# CONFIG_CRYPTO_GHASH is not set
# CONFIG_CRYPTO_POLY1305 is not set
CONFIG_CRYPTO_MD4=y
CONFIG_CRYPTO_MD5=y
# CONFIG_CRYPTO_MD5_PPC is not set
# CONFIG_CRYPTO_MICHAEL_MIC is not set
# CONFIG_CRYPTO_RMD128 is not set
# CONFIG_CRYPTO_RMD160 is not set
# CONFIG_CRYPTO_RMD256 is not set
# CONFIG_CRYPTO_RMD320 is not set
CONFIG_CRYPTO_SHA1=y
# CONFIG_CRYPTO_SHA1_PPC is not set
CONFIG_CRYPTO_SHA256=y
CONFIG_CRYPTO_SHA512=y
# CONFIG_CRYPTO_SHA3 is not set
# CONFIG_CRYPTO_SM3 is not set
# CONFIG_CRYPTO_STREEBOG is not set
# CONFIG_CRYPTO_TGR192 is not set
# CONFIG_CRYPTO_WP512 is not set

#
# Ciphers
#
CONFIG_CRYPTO_AES=y
# CONFIG_CRYPTO_AES_TI is not set
# CONFIG_CRYPTO_ANUBIS is not set
# CONFIG_CRYPTO_ARC4 is not set
# CONFIG_CRYPTO_BLOWFISH is not set
# CONFIG_CRYPTO_CAMELLIA is not set
# CONFIG_CRYPTO_CAST5 is not set
# CONFIG_CRYPTO_CAST6 is not set
CONFIG_CRYPTO_DES=y
# CONFIG_CRYPTO_FCRYPT is not set
# CONFIG_CRYPTO_KHAZAD is not set
# CONFIG_CRYPTO_SALSA20 is not set
# CONFIG_CRYPTO_CHACHA20 is not set
# CONFIG_CRYPTO_SEED is not set
# CONFIG_CRYPTO_SERPENT is not set
# CONFIG_CRYPTO_SM4 is not set
# CONFIG_CRYPTO_TEA is not set
# CONFIG_CRYPTO_TWOFISH is not set

#
# Compression
#
CONFIG_CRYPTO_DEFLATE=y
# CONFIG_CRYPTO_LZO is not set
# CONFIG_CRYPTO_842 is not set
# CONFIG_CRYPTO_LZ4 is not set
# CONFIG_CRYPTO_LZ4HC is not set
# CONFIG_CRYPTO_ZSTD is not set

#
# Random Number Generation
#
# CONFIG_CRYPTO_ANSI_CPRNG is not set
CONFIG_CRYPTO_DRBG_MENU=y
CONFIG_CRYPTO_DRBG_HMAC=y
# CONFIG_CRYPTO_DRBG_HASH is not set
CONFIG_CRYPTO_DRBG=y
CONFIG_CRYPTO_JITTERENTROPY=y
# CONFIG_CRYPTO_USER_API_HASH is not set
# CONFIG_CRYPTO_USER_API_SKCIPHER is not set
# CONFIG_CRYPTO_USER_API_RNG is not set
# CONFIG_CRYPTO_USER_API_AEAD is not set
CONFIG_CRYPTO_HW=y
CONFIG_CRYPTO_DEV_FSL_CAAM_COMMON=y
CONFIG_CRYPTO_DEV_FSL_CAAM=y
# CONFIG_CRYPTO_DEV_FSL_CAAM_DEBUG is not set
CONFIG_CRYPTO_DEV_FSL_CAAM_JR=y
CONFIG_CRYPTO_DEV_FSL_CAAM_RINGSIZE=9
# CONFIG_CRYPTO_DEV_FSL_CAAM_INTC is not set
CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_PKC_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_RNG_API=y
CONFIG_CRYPTO_DEV_FSL_CAAM_CRYPTO_API_DESC=y
CONFIG_CRYPTO_DEV_FSL_CAAM_AHASH_API_DESC=y
# CONFIG_CRYPTO_DEV_TALITOS is not set
# CONFIG_CRYPTO_DEV_NX is not set
# CONFIG_CRYPTO_DEV_NITROX_CNN55XX is not set
# CONFIG_CRYPTO_DEV_CCREE is not set
# CONFIG_ASYMMETRIC_KEY_TYPE is not set

#
# Certificates for signature checking
#
# CONFIG_SYSTEM_BLACKLIST_KEYRING is not set
CONFIG_BINARY_PRINTF=y

#
# Library routines
#
CONFIG_BITREVERSE=y
CONFIG_RATIONAL=y
CONFIG_GENERIC_STRNCPY_FROM_USER=y
CONFIG_GENERIC_STRNLEN_USER=y
CONFIG_GENERIC_NET_UTILS=y
CONFIG_GENERIC_PCI_IOMAP=y
CONFIG_ARCH_USE_CMPXCHG_LOCKREF=y
# CONFIG_CRC_CCITT is not set
CONFIG_CRC16=y
# CONFIG_CRC_T10DIF is not set
CONFIG_CRC_ITU_T=m
CONFIG_CRC32=y
# CONFIG_CRC32_SELFTEST is not set
CONFIG_CRC32_SLICEBY8=y
# CONFIG_CRC32_SLICEBY4 is not set
# CONFIG_CRC32_SARWATE is not set
# CONFIG_CRC32_BIT is not set
# CONFIG_CRC64 is not set
# CONFIG_CRC4 is not set
# CONFIG_CRC7 is not set
CONFIG_LIBCRC32C=y
# CONFIG_CRC8 is not set
# CONFIG_RANDOM32_SELFTEST is not set
CONFIG_ZLIB_INFLATE=y
CONFIG_ZLIB_DEFLATE=y
CONFIG_LZO_DECOMPRESS=y
CONFIG_LZ4_DECOMPRESS=y
CONFIG_XZ_DEC=y
CONFIG_XZ_DEC_X86=y
CONFIG_XZ_DEC_POWERPC=y
CONFIG_XZ_DEC_IA64=y
CONFIG_XZ_DEC_ARM=y
CONFIG_XZ_DEC_ARMTHUMB=y
CONFIG_XZ_DEC_SPARC=y
CONFIG_XZ_DEC_BCJ=y
# CONFIG_XZ_DEC_TEST is not set
CONFIG_DECOMPRESS_GZIP=y
CONFIG_DECOMPRESS_BZIP2=y
CONFIG_DECOMPRESS_LZMA=y
CONFIG_DECOMPRESS_XZ=y
CONFIG_DECOMPRESS_LZO=y
CONFIG_DECOMPRESS_LZ4=y
CONFIG_GENERIC_ALLOCATOR=y
CONFIG_ASSOCIATIVE_ARRAY=y
CONFIG_HAS_IOMEM=y
CONFIG_HAS_IOPORT_MAP=y
CONFIG_HAS_DMA=y
CONFIG_NEED_SG_DMA_LENGTH=y
CONFIG_NEED_DMA_MAP_STATE=y
CONFIG_ARCH_DMA_ADDR_T_64BIT=y
CONFIG_ARCH_HAS_DMA_SET_MASK=y
CONFIG_SWIOTLB=y
CONFIG_SGL_ALLOC=y
CONFIG_IOMMU_HELPER=y
CONFIG_CPU_RMAP=y
CONFIG_DQL=y
CONFIG_GLOB=y
# CONFIG_GLOB_SELFTEST is not set
CONFIG_NLATTR=y
CONFIG_CLZ_TAB=y
# CONFIG_CORDIC is not set
# CONFIG_DDR is not set
# CONFIG_IRQ_POLL is not set
CONFIG_MPILIB=y
CONFIG_LIBFDT=y
CONFIG_OID_REGISTRY=y
CONFIG_SG_POOL=y
CONFIG_ARCH_HAS_PMEM_API=y
CONFIG_ARCH_HAS_UACCESS_FLUSHCACHE=y
CONFIG_STACKDEPOT=y
CONFIG_SBITMAP=y
# CONFIG_STRING_SELFTEST is not set

#
# Kernel hacking
#

#
# printk and dmesg options
#
# CONFIG_PRINTK_TIME is not set
CONFIG_CONSOLE_LOGLEVEL_DEFAULT=7
CONFIG_CONSOLE_LOGLEVEL_QUIET=4
CONFIG_MESSAGE_LOGLEVEL_DEFAULT=4
# CONFIG_DYNAMIC_DEBUG is not set

#
# Compile-time checks and compiler options
#
# CONFIG_DEBUG_INFO is not set
CONFIG_ENABLE_MUST_CHECK=y
CONFIG_FRAME_WARN=2048
# CONFIG_STRIP_ASM_SYMS is not set
# CONFIG_READABLE_ASM is not set
# CONFIG_UNUSED_SYMBOLS is not set
# CONFIG_PAGE_OWNER is not set
CONFIG_DEBUG_FS=y
# CONFIG_HEADERS_CHECK is not set
# CONFIG_DEBUG_SECTION_MISMATCH is not set
CONFIG_SECTION_MISMATCH_WARN_ONLY=y
# CONFIG_DEBUG_FORCE_WEAK_PER_CPU is not set
CONFIG_MAGIC_SYSRQ=y
CONFIG_MAGIC_SYSRQ_DEFAULT_ENABLE=0x1
CONFIG_MAGIC_SYSRQ_SERIAL=y
CONFIG_DEBUG_KERNEL=y

#
# Memory Debugging
#
# CONFIG_PAGE_EXTENSION is not set
# CONFIG_DEBUG_PAGEALLOC is not set
# CONFIG_PAGE_POISONING is not set
# CONFIG_DEBUG_PAGE_REF is not set
# CONFIG_DEBUG_OBJECTS is not set
# CONFIG_DEBUG_SLAB is not set
CONFIG_HAVE_DEBUG_KMEMLEAK=y
# CONFIG_DEBUG_KMEMLEAK is not set
# CONFIG_DEBUG_STACK_USAGE is not set
# CONFIG_DEBUG_VM is not set
CONFIG_ARCH_HAS_DEBUG_VIRTUAL=y
# CONFIG_DEBUG_VIRTUAL is not set
# CONFIG_DEBUG_MEMORY_INIT is not set
# CONFIG_DEBUG_PER_CPU_MAPS is not set
CONFIG_HAVE_DEBUG_STACKOVERFLOW=y
CONFIG_DEBUG_STACKOVERFLOW=y
CONFIG_HAVE_ARCH_KASAN=y
CONFIG_CC_HAS_KASAN_GENERIC=y
CONFIG_KASAN=y
CONFIG_KASAN_GENERIC=y
# CONFIG_KASAN_EXTRA is not set
CONFIG_KASAN_OUTLINE=y
# CONFIG_KASAN_INLINE is not set
CONFIG_TEST_KASAN=m
CONFIG_ARCH_HAS_KCOV=y
CONFIG_CC_HAS_SANCOV_TRACE_PC=y
# CONFIG_KCOV is not set
CONFIG_DEBUG_SHIRQ=y

#
# Debug Lockups and Hangs
#
# CONFIG_SOFTLOCKUP_DETECTOR is not set
# CONFIG_HARDLOCKUP_DETECTOR is not set
CONFIG_DETECT_HUNG_TASK=y
CONFIG_DEFAULT_HUNG_TASK_TIMEOUT=120
# CONFIG_BOOTPARAM_HUNG_TASK_PANIC is not set
CONFIG_BOOTPARAM_HUNG_TASK_PANIC_VALUE=0
# CONFIG_WQ_WATCHDOG is not set
# CONFIG_PANIC_ON_OOPS is not set
CONFIG_PANIC_ON_OOPS_VALUE=0
# CONFIG_SCHED_DEBUG is not set
# CONFIG_SCHEDSTATS is not set
# CONFIG_SCHED_STACK_END_CHECK is not set
# CONFIG_DEBUG_TIMEKEEPING is not set

#
# Lock Debugging (spinlocks, mutexes, etc...)
#
CONFIG_LOCK_DEBUGGING_SUPPORT=y
# CONFIG_PROVE_LOCKING is not set
# CONFIG_LOCK_STAT is not set
# CONFIG_DEBUG_RT_MUTEXES is not set
# CONFIG_DEBUG_SPINLOCK is not set
# CONFIG_DEBUG_MUTEXES is not set
# CONFIG_DEBUG_WW_MUTEX_SLOWPATH is not set
# CONFIG_DEBUG_RWSEMS is not set
# CONFIG_DEBUG_LOCK_ALLOC is not set
# CONFIG_DEBUG_ATOMIC_SLEEP is not set
# CONFIG_DEBUG_LOCKING_API_SELFTESTS is not set
# CONFIG_LOCK_TORTURE_TEST is not set
# CONFIG_WW_MUTEX_SELFTEST is not set
CONFIG_STACKTRACE=y
# CONFIG_WARN_ALL_UNSEEDED_RANDOM is not set
# CONFIG_DEBUG_KOBJECT is not set
CONFIG_DEBUG_BUGVERBOSE=y
# CONFIG_DEBUG_LIST is not set
# CONFIG_DEBUG_PI_LIST is not set
# CONFIG_DEBUG_SG is not set
# CONFIG_DEBUG_NOTIFIERS is not set
# CONFIG_DEBUG_CREDENTIALS is not set

#
# RCU Debugging
#
# CONFIG_RCU_PERF_TEST is not set
# CONFIG_RCU_TORTURE_TEST is not set
CONFIG_RCU_CPU_STALL_TIMEOUT=21
CONFIG_RCU_TRACE=y
# CONFIG_RCU_EQS_DEBUG is not set
# CONFIG_DEBUG_WQ_FORCE_RR_CPU is not set
# CONFIG_DEBUG_BLOCK_EXT_DEVT is not set
# CONFIG_NOTIFIER_ERROR_INJECTION is not set
CONFIG_FUNCTION_ERROR_INJECTION=y
# CONFIG_FAULT_INJECTION is not set
# CONFIG_LATENCYTOP is not set
CONFIG_NOP_TRACER=y
CONFIG_HAVE_FUNCTION_TRACER=y
CONFIG_HAVE_FUNCTION_GRAPH_TRACER=y
CONFIG_HAVE_DYNAMIC_FTRACE=y
CONFIG_HAVE_FTRACE_MCOUNT_RECORD=y
CONFIG_HAVE_SYSCALL_TRACEPOINTS=y
CONFIG_TRACE_CLOCK=y
CONFIG_RING_BUFFER=y
CONFIG_EVENT_TRACING=y
CONFIG_CONTEXT_SWITCH_TRACER=y
CONFIG_TRACING=y
CONFIG_TRACING_SUPPORT=y
CONFIG_FTRACE=y
# CONFIG_FUNCTION_TRACER is not set
# CONFIG_PREEMPTIRQ_EVENTS is not set
# CONFIG_IRQSOFF_TRACER is not set
# CONFIG_SCHED_TRACER is not set
# CONFIG_HWLAT_TRACER is not set
# CONFIG_ENABLE_DEFAULT_TRACERS is not set
# CONFIG_FTRACE_SYSCALLS is not set
# CONFIG_TRACER_SNAPSHOT is not set
CONFIG_BRANCH_PROFILE_NONE=y
# CONFIG_PROFILE_ANNOTATED_BRANCHES is not set
# CONFIG_PROFILE_ALL_BRANCHES is not set
# CONFIG_STACK_TRACER is not set
# CONFIG_BLK_DEV_IO_TRACE is not set
CONFIG_KPROBE_EVENTS=y
CONFIG_UPROBE_EVENTS=y
CONFIG_DYNAMIC_EVENTS=y
CONFIG_PROBE_EVENTS=y
# CONFIG_HIST_TRIGGERS is not set
# CONFIG_TRACEPOINT_BENCHMARK is not set
# CONFIG_RING_BUFFER_BENCHMARK is not set
# CONFIG_RING_BUFFER_STARTUP_TEST is not set
# CONFIG_PREEMPTIRQ_DELAY_TEST is not set
# CONFIG_TRACE_EVAL_MAP_FILE is not set
CONFIG_TRACING_EVENTS_GPIO=y
# CONFIG_DMA_API_DEBUG is not set
CONFIG_RUNTIME_TESTING_MENU=y
# CONFIG_LKDTM is not set
# CONFIG_TEST_LIST_SORT is not set
# CONFIG_TEST_SORT is not set
# CONFIG_KPROBES_SANITY_TEST is not set
# CONFIG_BACKTRACE_SELF_TEST is not set
# CONFIG_RBTREE_TEST is not set
# CONFIG_INTERVAL_TREE_TEST is not set
# CONFIG_PERCPU_TEST is not set
# CONFIG_ATOMIC64_SELFTEST is not set
# CONFIG_TEST_HEXDUMP is not set
# CONFIG_TEST_STRING_HELPERS is not set
# CONFIG_TEST_KSTRTOX is not set
# CONFIG_TEST_PRINTF is not set
# CONFIG_TEST_BITMAP is not set
# CONFIG_TEST_BITFIELD is not set
# CONFIG_TEST_UUID is not set
# CONFIG_TEST_XARRAY is not set
# CONFIG_TEST_OVERFLOW is not set
# CONFIG_TEST_RHASHTABLE is not set
# CONFIG_TEST_HASH is not set
# CONFIG_TEST_IDA is not set
# CONFIG_TEST_LKM is not set
# CONFIG_TEST_USER_COPY is not set
# CONFIG_TEST_BPF is not set
# CONFIG_FIND_BIT_BENCHMARK is not set
# CONFIG_TEST_FIRMWARE is not set
# CONFIG_TEST_SYSCTL is not set
# CONFIG_TEST_UDELAY is not set
# CONFIG_TEST_STATIC_KEYS is not set
# CONFIG_TEST_KMOD is not set
# CONFIG_TEST_MEMCAT_P is not set
# CONFIG_MEMTEST is not set
# CONFIG_BUG_ON_DATA_CORRUPTION is not set
# CONFIG_SAMPLES is not set
CONFIG_HAVE_ARCH_KGDB=y
# CONFIG_KGDB is not set
CONFIG_ARCH_HAS_UBSAN_SANITIZE_ALL=y
# CONFIG_UBSAN is not set
CONFIG_ARCH_HAS_DEVMEM_IS_ALLOWED=y
CONFIG_STRICT_DEVMEM=y
# CONFIG_IO_STRICT_DEVMEM is not set
# CONFIG_PPC_DISABLE_WERROR is not set
CONFIG_PPC_WERROR=y
CONFIG_PRINT_STACK_DEPTH=64
# CONFIG_PPC_EMULATED_STATS is not set
# CONFIG_CODE_PATCHING_SELFTEST is not set
CONFIG_JUMP_LABEL_FEATURE_CHECKS=y
# CONFIG_JUMP_LABEL_FEATURE_CHECK_DEBUG is not set
# CONFIG_FTR_FIXUP_SELFTEST is not set
# CONFIG_MSI_BITMAP_SELFTEST is not set
# CONFIG_PPC_IRQ_SOFT_MASK_DEBUG is not set
# CONFIG_XMON is not set
CONFIG_PPC_EARLY_DEBUG=y
CONFIG_PPC_EARLY_DEBUG_MEMCONS=y
CONFIG_PPC_MEMCONS_OUTPUT_SIZE=4096
CONFIG_PPC_MEMCONS_INPUT_SIZE=128
CONFIG_PPC_PTDUMP=y

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Daniel Axtens]

>>> +#ifdef CONFIG_KASAN
>>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
>> 
>> I'm having some trouble with this. I get warnings like this:
>> 
>> WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.
>
> I don't have this problem, neither with my PPC32 defconfigs nor with 
> ppc64e_defconfig - SPARSEMEM_VMEMMAP + KASAN
> Using GCC 8.1
>
> I've been looking into it in more details and can't understand the need 
> for a weak symbol. A weak symbol is to allow it's optional replacement 
> by other code. But here KASAN replaces it inconditionally, so I see no 
> point for a weak symbol here.

If you don't make it weak, and kasan and arch code will export it as
a regular symbol, and you will end up with a clash like this:

powerpc64-linux-gnu-ld: mm/kasan/common.o: in function `.memset':
(.text+0x210): multiple definition of `.memset'; arch/powerpc/lib/mem_64.o:(.text+0x0): first defined here
powerpc64-linux-gnu-ld: mm/kasan/common.o:(.opd+0x78): multiple definition of `memset'; arch/powerpc/lib/mem_64.o:(.opd+0x0): first defined here

But your patch doesn't do that, so don't worry :)

> Regarding the export of the functions, I believe that when the functions 
> are defined in KASAN, they should be exported by KASAN and not by the 
> arch. But such a change is out of scope for now. So lets have a double 
> export for now, one day we will drop it.
>
> Regarding export of __memcpy() etc..., there is at least the LKDTM 
> module which inhibits KASAN, so it really needs to be exported.
>
> What about the patch below ?

Yes, that works for me. After de-mangling it I have used it to replace
your patch 2 v9.

Thanks for bearing with me.

Regards,
Daniel

>
> Christophe
>
> diff --git a/arch/powerpc/include/asm/kasan.h 
> b/arch/powerpc/include/asm/kasan.h
> new file mode 100644
> index 000000000000..2c179a39d4ba
> --- /dev/null
> +++ b/arch/powerpc/include/asm/kasan.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __ASM_KASAN_H
> +#define __ASM_KASAN_H
> +
> +#ifdef CONFIG_KASAN
> +#define _GLOBAL_KASAN(fn)	_GLOBAL(__##fn)
> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(__##fn)
> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn)
> +#else
> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
> +#define EXPORT_SYMBOL_KASAN(fn)
> +#endif
> +
> +#endif
> diff --git a/arch/powerpc/include/asm/string.h 
> b/arch/powerpc/include/asm/string.h
> index 1647de15a31e..9bf6dffb4090 100644
> --- a/arch/powerpc/include/asm/string.h
> +++ b/arch/powerpc/include/asm/string.h
> @@ -4,14 +4,17 @@
>
>   #ifdef __KERNEL__
>
> +#ifndef CONFIG_KASAN
>   #define __HAVE_ARCH_STRNCPY
>   #define __HAVE_ARCH_STRNCMP
> +#define __HAVE_ARCH_MEMCHR
> +#define __HAVE_ARCH_MEMCMP
> +#define __HAVE_ARCH_MEMSET16
> +#endif
> +
>   #define __HAVE_ARCH_MEMSET
>   #define __HAVE_ARCH_MEMCPY
>   #define __HAVE_ARCH_MEMMOVE
> -#define __HAVE_ARCH_MEMCMP
> -#define __HAVE_ARCH_MEMCHR
> -#define __HAVE_ARCH_MEMSET16
>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>
>   extern char * strcpy(char *,const char *);
> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void 
> *,__kernel_size_t);
>   extern void * memchr(const void *,int,__kernel_size_t);
>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>
> +void *__memset(void *s, int c, __kernel_size_t count);
> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
> +void *__memmove(void *to, const void *from, __kernel_size_t n);
> +
> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
> +/*
> + * For files that are not instrumented (e.g. mm/slub.c) we
> + * should use not instrumented version of mem* functions.
> + */
> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
> +#define memmove(dst, src, len) __memmove(dst, src, len)
> +#define memset(s, c, n) __memset(s, c, n)
> +
> +#ifndef __NO_FORTIFY
> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
> +#endif
> +
> +#endif
> +
>   #ifdef CONFIG_PPC64
> +#ifndef CONFIG_KASAN
>   #define __HAVE_ARCH_MEMSET32
>   #define __HAVE_ARCH_MEMSET64
>
> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, 
> __kernel_size_t n)
>   {
>   	return __memset64(p, v, n * 8);
>   }
> +#endif
>   #else
> +#ifndef CONFIG_KASAN
>   #define __HAVE_ARCH_STRLEN
> +#endif
>
>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>   #endif
> diff --git a/arch/powerpc/kernel/prom_init_check.sh 
> b/arch/powerpc/kernel/prom_init_check.sh
> index 667df97d2595..181fd10008ef 100644
> --- a/arch/powerpc/kernel/prom_init_check.sh
> +++ b/arch/powerpc/kernel/prom_init_check.sh
> @@ -16,8 +16,16 @@
>   # If you really need to reference something from prom_init.o add
>   # it to the list below:
>
> +grep "^CONFIG_KASAN=y$" .config >/dev/null
> +if [ $? -eq 0 ]
> +then
> +	MEM_FUNCS="__memcpy __memset"
> +else
> +	MEM_FUNCS="memcpy memset"
> +fi
> +
>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
> -_end enter_prom memcpy memset reloc_offset __secondary_hold
> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 79396e184bca..47a4de434c22 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>
> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
> +obj-y += alloc.o code-patching.o feature-fixups.o
>
> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
> +ifndef CONFIG_KASAN
> +obj-y	+=	string.o memcmp_$(BITS).o
> +obj-$(CONFIG_PPC32)	+= strlen_32.o
> +endif
> +
> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>
>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>
> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= 
> test_emulate_step.o \
>   					   test_emulate_step_exec_instr.o
>
>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
> -			   string_$(BITS).o memcmp_$(BITS).o
> +			   string_$(BITS).o
>
>   obj-y			+= sstep.o ldstfp.o quad.o
>   obj64-y			+= quad.o
> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
> index ba66846fe973..d5642481fb98 100644
> --- a/arch/powerpc/lib/copy_32.S
> +++ b/arch/powerpc/lib/copy_32.S
> @@ -14,6 +14,7 @@
>   #include <asm/ppc_asm.h>
>   #include <asm/export.h>
>   #include <asm/code-patching-asm.h>
> +#include <asm/kasan.h>
>
>   #define COPY_16_BYTES		\
>   	lwz	r7,4(r4);	\
> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>
> +#ifndef CONFIG_KASAN
>   _GLOBAL(memset16)
>   	rlwinm.	r0 ,r5, 31, 1, 31
>   	addi	r6, r3, -4
> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>   	sth	r4, 4(r6)
>   	blr
>   EXPORT_SYMBOL(memset16)
> +#endif
>
>   /*
>    * Use dcbz on the complete cache lines in the destination
> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>    * replaced by a nop once cache is active. This is done in machine_init()
>    */
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>   	cmplwi	0,r5,4
>   	blt	7f
>
> @@ -151,6 +154,7 @@ _GLOBAL(memset)
>   	bdnz	9b
>   	blr
>   EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>
>   /*
>    * This version uses dcbz on the complete cache lines in the
> @@ -163,12 +167,12 @@ EXPORT_SYMBOL(memset)
>    * We therefore jump to generic_memcpy which doesn't use dcbz. This 
> jump is
>    * replaced by a nop once cache is active. This is done in machine_init()
>    */
> -_GLOBAL(memmove)
> +_GLOBAL_KASAN(memmove)
>   	cmplw	0,r3,r4
>   	bgt	backwards_memcpy
>   	/* fall through */
>
> -_GLOBAL(memcpy)
> +_GLOBAL_KASAN(memcpy)
>   1:	b	generic_memcpy
>   	patch_site	1b, patch__memcpy_nocache
>
> @@ -244,6 +248,8 @@ _GLOBAL(memcpy)
>   65:	blr
>   EXPORT_SYMBOL(memcpy)
>   EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL_KASAN(memmove)
>
>   generic_memcpy:
>   	srwi.	r7,r5,3
> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
> index 3c3be02f33b7..7f6bd031c306 100644
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -12,7 +12,9 @@
>   #include <asm/errno.h>
>   #include <asm/ppc_asm.h>
>   #include <asm/export.h>
> +#include <asm/kasan.h>
>
> +#ifndef CONFIG_KASAN
>   _GLOBAL(__memset16)
>   	rlwimi	r4,r4,16,0,15
>   	/* fall through */
> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>   EXPORT_SYMBOL(__memset16)
>   EXPORT_SYMBOL(__memset32)
>   EXPORT_SYMBOL(__memset64)
> +#endif
>
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>   	neg	r0,r3
>   	rlwimi	r4,r4,8,16,23
>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
> @@ -96,8 +99,9 @@ _GLOBAL(memset)
>   	stb	r4,0(r6)
>   	blr
>   EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>
> -_GLOBAL_TOC(memmove)
> +_GLOBAL_TOC_KASAN(memmove)
>   	cmplw	0,r3,r4
>   	bgt	backwards_memcpy
>   	b	memcpy
> @@ -139,3 +143,4 @@ _GLOBAL(backwards_memcpy)
>   	mtctr	r7
>   	b	1b
>   EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 273ea67e60a1..25c3772c1dfb 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -11,6 +11,7 @@
>   #include <asm/export.h>
>   #include <asm/asm-compat.h>
>   #include <asm/feature-fixups.h>
> +#include <asm/kasan.h>
>
>   #ifndef SELFTEST_CASE
>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
> @@ -18,7 +19,7 @@
>   #endif
>
>   	.align	7
> -_GLOBAL_TOC(memcpy)
> +_GLOBAL_TOC_KASAN(memcpy)
>   BEGIN_FTR_SECTION
>   #ifdef __LITTLE_ENDIAN__
>   	cmpdi	cr7,r5,0
> @@ -230,3 +231,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>   	blr
>   #endif
>   EXPORT_SYMBOL(memcpy)
> +EXPORT_SYMBOL_KASAN(memcpy)
>
>
>> 
>> It seems to be related to the export line, as if I swap the exports to
>> do fn before __##fn I get:
>> 
>> WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.
>> 
>> I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
>> This works - no warning:
>> 
>> EXPORT_SYMBOL(memset)
>> EXPORT_SYMBOL(__memset)
>> 
>> This throws a warning:
>> 
>> EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)
>> 
>> I notice in looking at the diff of preprocessed source we end up
>> invoking an asm macro that doesn't seem to have a full final argument, I
>> wonder if that's relevant...
>> 
>> -___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
>> +___EXPORT_SYMBOL __memset, __memset,
>> +___EXPORT_SYMBOL memset, memset,
>> 
>> I also notice that nowhere else in the source do people have multiple
>> EXPORT_SYMBOLs on the same line, and other arches seem to just
>> unconditionally export both symbols on multiple lines.
>> 
>> I have no idea how this works for you - maybe it's affected by something 32bit.
>> 
>> How would you feel about this approach instead? I'm not tied to any of
>> the names or anything.
>> 
>> diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
>> index e0637730a8e7..7b6a91b448dd 100644
>> --- a/arch/powerpc/include/asm/ppc_asm.h
>> +++ b/arch/powerpc/include/asm/ppc_asm.h
>> @@ -214,6 +214,9 @@ name: \
>>   
>>   #define DOTSYM(a)      a
>>   
>> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
>> +       .weak weakname ; .set weakname, strongname ;
>> +
>>   #else
>>   
>>   #define XGLUE(a,b) a##b
>> @@ -236,6 +239,10 @@ GLUE(.,name):
>>   
>>   #define DOTSYM(a)      GLUE(.,a)
>>   
>> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
>> +       .weak weakname ; .set weakname, strongname ; \
>> +       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
>> +
>>   #endif
>>   
>>   #else /* 32-bit */
>> @@ -251,6 +258,9 @@ GLUE(.,name):
>>   
>>   #define _GLOBAL_TOC(name) _GLOBAL(name)
>>   
>> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
>> +       .weak weakname ; .set weakname, strongname ;
>> +
>>   #endif
>>   
>>   /*
>> --- a/arch/powerpc/lib/mem_64.S
>> +++ b/arch/powerpc/lib/mem_64.S
>> @@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
>>   EXPORT_SYMBOL(__memset64)
>>   #endif
>>   
>> -_GLOBAL_KASAN(memset)
>> +PROVIDE_WEAK_ALIAS(__memset,memset)
>> +_GLOBAL(__memset)
>>          neg     r0,r3
>>          rlwimi  r4,r4,8,16,23
>>          andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
>> @@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
>>   10:    bflr    31
>>          stb     r4,0(r6)
>>          blr
>> -EXPORT_SYMBOL_KASAN(memset)
>> +EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL(__memset)
>>   
>> -_GLOBAL_TOC_KASAN(memmove)
>> +PROVIDE_WEAK_ALIAS(__memmove,memove)
>> +_GLOBAL_TOC(__memmove)
>>          cmplw   0,r3,r4
>>          bgt     backwards_memcpy
>>          b       memcpy
>> @@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
>>          beq     2b
>>          mtctr   r7
>>          b       1b
>> -EXPORT_SYMBOL_KASAN(memmove)
>> +EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL(__memmove)
>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>> index 862b515b8868..7c1b09556cad 100644
>> --- a/arch/powerpc/lib/memcpy_64.S
>> +++ b/arch/powerpc/lib/memcpy_64.S
>> @@ -19,7 +19,8 @@
>>   #endif
>>   
>>          .align  7
>> -_GLOBAL_TOC_KASAN(memcpy)
>> +PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
>> +_GLOBAL_TOC(__memcpy)
>>   BEGIN_FTR_SECTION
>>   #ifdef __LITTLE_ENDIAN__
>>          cmpdi   cr7,r5,0
>> @@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>   4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
>>          blr
>>   #endif
>> -EXPORT_SYMBOL_KASAN(memcpy)
>> +EXPORT_SYMBOL(__memcpy)
>> +EXPORT_SYMBOL(memcpy)
>> 
>> 
>> Regards,
>> Daniel
>> 
>> 
>>> +#else
>>> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
>>> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
>>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
>>> +#endif
>>> +
>>> +#endif
>>> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
>>> index 1647de15a31e..9bf6dffb4090 100644
>>> --- a/arch/powerpc/include/asm/string.h
>>> +++ b/arch/powerpc/include/asm/string.h
>>> @@ -4,14 +4,17 @@
>>>   
>>>   #ifdef __KERNEL__
>>>   
>>> +#ifndef CONFIG_KASAN
>>>   #define __HAVE_ARCH_STRNCPY
>>>   #define __HAVE_ARCH_STRNCMP
>>> +#define __HAVE_ARCH_MEMCHR
>>> +#define __HAVE_ARCH_MEMCMP
>>> +#define __HAVE_ARCH_MEMSET16
>>> +#endif
>>> +
>>>   #define __HAVE_ARCH_MEMSET
>>>   #define __HAVE_ARCH_MEMCPY
>>>   #define __HAVE_ARCH_MEMMOVE
>>> -#define __HAVE_ARCH_MEMCMP
>>> -#define __HAVE_ARCH_MEMCHR
>>> -#define __HAVE_ARCH_MEMSET16
>>>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>>>   
>>>   extern char * strcpy(char *,const char *);
>>> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>>>   extern void * memchr(const void *,int,__kernel_size_t);
>>>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>>>   
>>> +void *__memset(void *s, int c, __kernel_size_t count);
>>> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
>>> +void *__memmove(void *to, const void *from, __kernel_size_t n);
>>> +
>>> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
>>> +/*
>>> + * For files that are not instrumented (e.g. mm/slub.c) we
>>> + * should use not instrumented version of mem* functions.
>>> + */
>>> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
>>> +#define memmove(dst, src, len) __memmove(dst, src, len)
>>> +#define memset(s, c, n) __memset(s, c, n)
>>> +
>>> +#ifndef __NO_FORTIFY
>>> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
>>> +#endif
>>> +
>>> +#endif
>>> +
>>>   #ifdef CONFIG_PPC64
>>> +#ifndef CONFIG_KASAN
>>>   #define __HAVE_ARCH_MEMSET32
>>>   #define __HAVE_ARCH_MEMSET64
>>>   
>>> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>>>   {
>>>   	return __memset64(p, v, n * 8);
>>>   }
>>> +#endif
>>>   #else
>>> +#ifndef CONFIG_KASAN
>>>   #define __HAVE_ARCH_STRLEN
>>> +#endif
>>>   
>>>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>>>   #endif
>>> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
>>> index 667df97d2595..181fd10008ef 100644
>>> --- a/arch/powerpc/kernel/prom_init_check.sh
>>> +++ b/arch/powerpc/kernel/prom_init_check.sh
>>> @@ -16,8 +16,16 @@
>>>   # If you really need to reference something from prom_init.o add
>>>   # it to the list below:
>>>   
>>> +grep "^CONFIG_KASAN=y$" .config >/dev/null
>>> +if [ $? -eq 0 ]
>>> +then
>>> +	MEM_FUNCS="__memcpy __memset"
>>> +else
>>> +	MEM_FUNCS="memcpy memset"
>>> +fi
>>> +
>>>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
>>> -_end enter_prom memcpy memset reloc_offset __secondary_hold
>>> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>>>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>>>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>>>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
>>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>>> index 79396e184bca..47a4de434c22 100644
>>> --- a/arch/powerpc/lib/Makefile
>>> +++ b/arch/powerpc/lib/Makefile
>>> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>>>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>>>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>>>   
>>> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
>>> +obj-y += alloc.o code-patching.o feature-fixups.o
>>>   
>>> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
>>> +ifndef CONFIG_KASAN
>>> +obj-y	+=	string.o memcmp_$(BITS).o
>>> +obj-$(CONFIG_PPC32)	+= strlen_32.o
>>> +endif
>>> +
>>> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>>>   
>>>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>>>   
>>> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>>>   					   test_emulate_step_exec_instr.o
>>>   
>>>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
>>> -			   string_$(BITS).o memcmp_$(BITS).o
>>> +			   string_$(BITS).o
>>>   
>>>   obj-y			+= sstep.o ldstfp.o quad.o
>>>   obj64-y			+= quad.o
>>> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
>>> index ba66846fe973..fc4fa7246200 100644
>>> --- a/arch/powerpc/lib/copy_32.S
>>> +++ b/arch/powerpc/lib/copy_32.S
>>> @@ -14,6 +14,7 @@
>>>   #include <asm/ppc_asm.h>
>>>   #include <asm/export.h>
>>>   #include <asm/code-patching-asm.h>
>>> +#include <asm/kasan.h>
>>>   
>>>   #define COPY_16_BYTES		\
>>>   	lwz	r7,4(r4);	\
>>> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>>>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>>>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>>>   
>>> +#ifndef CONFIG_KASAN
>>>   _GLOBAL(memset16)
>>>   	rlwinm.	r0 ,r5, 31, 1, 31
>>>   	addi	r6, r3, -4
>>> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>>>   	sth	r4, 4(r6)
>>>   	blr
>>>   EXPORT_SYMBOL(memset16)
>>> +#endif
>>>   
>>>   /*
>>>    * Use dcbz on the complete cache lines in the destination
>>> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>>>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>>>    * replaced by a nop once cache is active. This is done in machine_init()
>>>    */
>>> -_GLOBAL(memset)
>>> +_GLOBAL_KASAN(memset)
>>>   	cmplwi	0,r5,4
>>>   	blt	7f
>>>   
>>> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>>>   9:	stbu	r4,1(r6)
>>>   	bdnz	9b
>>>   	blr
>>> -EXPORT_SYMBOL(memset)
>>> +EXPORT_SYMBOL_KASAN(memset)
>>>   
>>>   /*
>>>    * This version uses dcbz on the complete cache lines in the
>>> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>>>    * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>>>    * replaced by a nop once cache is active. This is done in machine_init()
>>>    */
>>> -_GLOBAL(memmove)
>>> +_GLOBAL_KASAN(memmove)
>>>   	cmplw	0,r3,r4
>>>   	bgt	backwards_memcpy
>>>   	/* fall through */
>>>   
>>> -_GLOBAL(memcpy)
>>> +_GLOBAL_KASAN(memcpy)
>>>   1:	b	generic_memcpy
>>>   	patch_site	1b, patch__memcpy_nocache
>>>   
>>> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>>>   	stbu	r0,1(r6)
>>>   	bdnz	40b
>>>   65:	blr
>>> -EXPORT_SYMBOL(memcpy)
>>> -EXPORT_SYMBOL(memmove)
>>> +EXPORT_SYMBOL_KASAN(memcpy)
>>> +EXPORT_SYMBOL_KASAN(memmove)
>>>   
>>>   generic_memcpy:
>>>   	srwi.	r7,r5,3
>>> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
>>> index 3c3be02f33b7..7cd6cf6822a2 100644
>>> --- a/arch/powerpc/lib/mem_64.S
>>> +++ b/arch/powerpc/lib/mem_64.S
>>> @@ -12,7 +12,9 @@
>>>   #include <asm/errno.h>
>>>   #include <asm/ppc_asm.h>
>>>   #include <asm/export.h>
>>> +#include <asm/kasan.h>
>>>   
>>> +#ifndef CONFIG_KASAN
>>>   _GLOBAL(__memset16)
>>>   	rlwimi	r4,r4,16,0,15
>>>   	/* fall through */
>>> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>>>   EXPORT_SYMBOL(__memset16)
>>>   EXPORT_SYMBOL(__memset32)
>>>   EXPORT_SYMBOL(__memset64)
>>> +#endif
>>>   
>>> -_GLOBAL(memset)
>>> +_GLOBAL_KASAN(memset)
>>>   	neg	r0,r3
>>>   	rlwimi	r4,r4,8,16,23
>>>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
>>> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>>>   10:	bflr	31
>>>   	stb	r4,0(r6)
>>>   	blr
>>> -EXPORT_SYMBOL(memset)
>>> +EXPORT_SYMBOL_KASAN(memset)
>>>   
>>> -_GLOBAL_TOC(memmove)
>>> +_GLOBAL_TOC_KASAN(memmove)
>>>   	cmplw	0,r3,r4
>>>   	bgt	backwards_memcpy
>>>   	b	memcpy
>>> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>>>   	beq	2b
>>>   	mtctr	r7
>>>   	b	1b
>>> -EXPORT_SYMBOL(memmove)
>>> +EXPORT_SYMBOL_KASAN(memmove)
>>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>>> index 273ea67e60a1..862b515b8868 100644
>>> --- a/arch/powerpc/lib/memcpy_64.S
>>> +++ b/arch/powerpc/lib/memcpy_64.S
>>> @@ -11,6 +11,7 @@
>>>   #include <asm/export.h>
>>>   #include <asm/asm-compat.h>
>>>   #include <asm/feature-fixups.h>
>>> +#include <asm/kasan.h>
>>>   
>>>   #ifndef SELFTEST_CASE
>>>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
>>> @@ -18,7 +19,7 @@
>>>   #endif
>>>   
>>>   	.align	7
>>> -_GLOBAL_TOC(memcpy)
>>> +_GLOBAL_TOC_KASAN(memcpy)
>>>   BEGIN_FTR_SECTION
>>>   #ifdef __LITTLE_ENDIAN__
>>>   	cmpdi	cr7,r5,0
>>> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>>   4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>>>   	blr
>>>   #endif
>>> -EXPORT_SYMBOL(memcpy)
>>> +EXPORT_SYMBOL_KASAN(memcpy)
>>> -- 
>>> 2.13.3

Re: [PATCH v9 02/11] powerpc: prepare string/mem functions for KASAN

[Daniel Axtens]

>>> +#ifdef CONFIG_KASAN
>>> +#define _GLOBAL_KASAN(fn)	.weak fn ; _GLOBAL(__##fn) ; _GLOBAL(fn)
>>> +#define _GLOBAL_TOC_KASAN(fn)	.weak fn ; _GLOBAL_TOC(__##fn) ; _GLOBAL_TOC(fn)
>>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn) ; EXPORT_SYMBOL(fn)
>> 
>> I'm having some trouble with this. I get warnings like this:
>> 
>> WARNING: EXPORT symbol "__memcpy" [vmlinux] version generation failed, symbol will not be versioned.
>
> I don't have this problem, neither with my PPC32 defconfigs nor with 
> ppc64e_defconfig - SPARSEMEM_VMEMMAP + KASAN
> Using GCC 8.1
>
> I've been looking into it in more details and can't understand the need 
> for a weak symbol. A weak symbol is to allow it's optional replacement 
> by other code. But here KASAN replaces it inconditionally, so I see no 
> point for a weak symbol here.

If you don't make it weak, and kasan and arch code will export it as
a regular symbol, and you will end up with a clash like this:

powerpc64-linux-gnu-ld: mm/kasan/common.o: in function `.memset':
(.text+0x210): multiple definition of `.memset'; arch/powerpc/lib/mem_64.o:(.text+0x0): first defined here
powerpc64-linux-gnu-ld: mm/kasan/common.o:(.opd+0x78): multiple definition of `memset'; arch/powerpc/lib/mem_64.o:(.opd+0x0): first defined here

But your patch doesn't do that, so don't worry :)

> Regarding the export of the functions, I believe that when the functions 
> are defined in KASAN, they should be exported by KASAN and not by the 
> arch. But such a change is out of scope for now. So lets have a double 
> export for now, one day we will drop it.
>
> Regarding export of __memcpy() etc..., there is at least the LKDTM 
> module which inhibits KASAN, so it really needs to be exported.
>
> What about the patch below ?

Yes, that works for me. After de-mangling it I have used it to replace
your patch 2 v9.

Thanks for bearing with me.

Regards,
Daniel

>
> Christophe
>
> diff --git a/arch/powerpc/include/asm/kasan.h 
> b/arch/powerpc/include/asm/kasan.h
> new file mode 100644
> index 000000000000..2c179a39d4ba
> --- /dev/null
> +++ b/arch/powerpc/include/asm/kasan.h
> @@ -0,0 +1,15 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +#ifndef __ASM_KASAN_H
> +#define __ASM_KASAN_H
> +
> +#ifdef CONFIG_KASAN
> +#define _GLOBAL_KASAN(fn)	_GLOBAL(__##fn)
> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(__##fn)
> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(__##fn)
> +#else
> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
> +#define EXPORT_SYMBOL_KASAN(fn)
> +#endif
> +
> +#endif
> diff --git a/arch/powerpc/include/asm/string.h 
> b/arch/powerpc/include/asm/string.h
> index 1647de15a31e..9bf6dffb4090 100644
> --- a/arch/powerpc/include/asm/string.h
> +++ b/arch/powerpc/include/asm/string.h
> @@ -4,14 +4,17 @@
>
>   #ifdef __KERNEL__
>
> +#ifndef CONFIG_KASAN
>   #define __HAVE_ARCH_STRNCPY
>   #define __HAVE_ARCH_STRNCMP
> +#define __HAVE_ARCH_MEMCHR
> +#define __HAVE_ARCH_MEMCMP
> +#define __HAVE_ARCH_MEMSET16
> +#endif
> +
>   #define __HAVE_ARCH_MEMSET
>   #define __HAVE_ARCH_MEMCPY
>   #define __HAVE_ARCH_MEMMOVE
> -#define __HAVE_ARCH_MEMCMP
> -#define __HAVE_ARCH_MEMCHR
> -#define __HAVE_ARCH_MEMSET16
>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>
>   extern char * strcpy(char *,const char *);
> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void 
> *,__kernel_size_t);
>   extern void * memchr(const void *,int,__kernel_size_t);
>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>
> +void *__memset(void *s, int c, __kernel_size_t count);
> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
> +void *__memmove(void *to, const void *from, __kernel_size_t n);
> +
> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
> +/*
> + * For files that are not instrumented (e.g. mm/slub.c) we
> + * should use not instrumented version of mem* functions.
> + */
> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
> +#define memmove(dst, src, len) __memmove(dst, src, len)
> +#define memset(s, c, n) __memset(s, c, n)
> +
> +#ifndef __NO_FORTIFY
> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
> +#endif
> +
> +#endif
> +
>   #ifdef CONFIG_PPC64
> +#ifndef CONFIG_KASAN
>   #define __HAVE_ARCH_MEMSET32
>   #define __HAVE_ARCH_MEMSET64
>
> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, 
> __kernel_size_t n)
>   {
>   	return __memset64(p, v, n * 8);
>   }
> +#endif
>   #else
> +#ifndef CONFIG_KASAN
>   #define __HAVE_ARCH_STRLEN
> +#endif
>
>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>   #endif
> diff --git a/arch/powerpc/kernel/prom_init_check.sh 
> b/arch/powerpc/kernel/prom_init_check.sh
> index 667df97d2595..181fd10008ef 100644
> --- a/arch/powerpc/kernel/prom_init_check.sh
> +++ b/arch/powerpc/kernel/prom_init_check.sh
> @@ -16,8 +16,16 @@
>   # If you really need to reference something from prom_init.o add
>   # it to the list below:
>
> +grep "^CONFIG_KASAN=y$" .config >/dev/null
> +if [ $? -eq 0 ]
> +then
> +	MEM_FUNCS="__memcpy __memset"
> +else
> +	MEM_FUNCS="memcpy memset"
> +fi
> +
>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
> -_end enter_prom memcpy memset reloc_offset __secondary_hold
> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
> index 79396e184bca..47a4de434c22 100644
> --- a/arch/powerpc/lib/Makefile
> +++ b/arch/powerpc/lib/Makefile
> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>
> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
> +obj-y += alloc.o code-patching.o feature-fixups.o
>
> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
> +ifndef CONFIG_KASAN
> +obj-y	+=	string.o memcmp_$(BITS).o
> +obj-$(CONFIG_PPC32)	+= strlen_32.o
> +endif
> +
> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>
>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>
> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= 
> test_emulate_step.o \
>   					   test_emulate_step_exec_instr.o
>
>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
> -			   string_$(BITS).o memcmp_$(BITS).o
> +			   string_$(BITS).o
>
>   obj-y			+= sstep.o ldstfp.o quad.o
>   obj64-y			+= quad.o
> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
> index ba66846fe973..d5642481fb98 100644
> --- a/arch/powerpc/lib/copy_32.S
> +++ b/arch/powerpc/lib/copy_32.S
> @@ -14,6 +14,7 @@
>   #include <asm/ppc_asm.h>
>   #include <asm/export.h>
>   #include <asm/code-patching-asm.h>
> +#include <asm/kasan.h>
>
>   #define COPY_16_BYTES		\
>   	lwz	r7,4(r4);	\
> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>
> +#ifndef CONFIG_KASAN
>   _GLOBAL(memset16)
>   	rlwinm.	r0 ,r5, 31, 1, 31
>   	addi	r6, r3, -4
> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>   	sth	r4, 4(r6)
>   	blr
>   EXPORT_SYMBOL(memset16)
> +#endif
>
>   /*
>    * Use dcbz on the complete cache lines in the destination
> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>    * replaced by a nop once cache is active. This is done in machine_init()
>    */
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>   	cmplwi	0,r5,4
>   	blt	7f
>
> @@ -151,6 +154,7 @@ _GLOBAL(memset)
>   	bdnz	9b
>   	blr
>   EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>
>   /*
>    * This version uses dcbz on the complete cache lines in the
> @@ -163,12 +167,12 @@ EXPORT_SYMBOL(memset)
>    * We therefore jump to generic_memcpy which doesn't use dcbz. This 
> jump is
>    * replaced by a nop once cache is active. This is done in machine_init()
>    */
> -_GLOBAL(memmove)
> +_GLOBAL_KASAN(memmove)
>   	cmplw	0,r3,r4
>   	bgt	backwards_memcpy
>   	/* fall through */
>
> -_GLOBAL(memcpy)
> +_GLOBAL_KASAN(memcpy)
>   1:	b	generic_memcpy
>   	patch_site	1b, patch__memcpy_nocache
>
> @@ -244,6 +248,8 @@ _GLOBAL(memcpy)
>   65:	blr
>   EXPORT_SYMBOL(memcpy)
>   EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memcpy)
> +EXPORT_SYMBOL_KASAN(memmove)
>
>   generic_memcpy:
>   	srwi.	r7,r5,3
> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
> index 3c3be02f33b7..7f6bd031c306 100644
> --- a/arch/powerpc/lib/mem_64.S
> +++ b/arch/powerpc/lib/mem_64.S
> @@ -12,7 +12,9 @@
>   #include <asm/errno.h>
>   #include <asm/ppc_asm.h>
>   #include <asm/export.h>
> +#include <asm/kasan.h>
>
> +#ifndef CONFIG_KASAN
>   _GLOBAL(__memset16)
>   	rlwimi	r4,r4,16,0,15
>   	/* fall through */
> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>   EXPORT_SYMBOL(__memset16)
>   EXPORT_SYMBOL(__memset32)
>   EXPORT_SYMBOL(__memset64)
> +#endif
>
> -_GLOBAL(memset)
> +_GLOBAL_KASAN(memset)
>   	neg	r0,r3
>   	rlwimi	r4,r4,8,16,23
>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
> @@ -96,8 +99,9 @@ _GLOBAL(memset)
>   	stb	r4,0(r6)
>   	blr
>   EXPORT_SYMBOL(memset)
> +EXPORT_SYMBOL_KASAN(memset)
>
> -_GLOBAL_TOC(memmove)
> +_GLOBAL_TOC_KASAN(memmove)
>   	cmplw	0,r3,r4
>   	bgt	backwards_memcpy
>   	b	memcpy
> @@ -139,3 +143,4 @@ _GLOBAL(backwards_memcpy)
>   	mtctr	r7
>   	b	1b
>   EXPORT_SYMBOL(memmove)
> +EXPORT_SYMBOL_KASAN(memmove)
> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
> index 273ea67e60a1..25c3772c1dfb 100644
> --- a/arch/powerpc/lib/memcpy_64.S
> +++ b/arch/powerpc/lib/memcpy_64.S
> @@ -11,6 +11,7 @@
>   #include <asm/export.h>
>   #include <asm/asm-compat.h>
>   #include <asm/feature-fixups.h>
> +#include <asm/kasan.h>
>
>   #ifndef SELFTEST_CASE
>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
> @@ -18,7 +19,7 @@
>   #endif
>
>   	.align	7
> -_GLOBAL_TOC(memcpy)
> +_GLOBAL_TOC_KASAN(memcpy)
>   BEGIN_FTR_SECTION
>   #ifdef __LITTLE_ENDIAN__
>   	cmpdi	cr7,r5,0
> @@ -230,3 +231,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>   	blr
>   #endif
>   EXPORT_SYMBOL(memcpy)
> +EXPORT_SYMBOL_KASAN(memcpy)
>
>
>> 
>> It seems to be related to the export line, as if I swap the exports to
>> do fn before __##fn I get:
>> 
>> WARNING: EXPORT symbol "memset" [vmlinux] version generation failed, symbol will not be versioned.
>> 
>> I have narrowed this down to combining 2 EXPORT_SYMBOL()s on one line.
>> This works - no warning:
>> 
>> EXPORT_SYMBOL(memset)
>> EXPORT_SYMBOL(__memset)
>> 
>> This throws a warning:
>> 
>> EXPORT_SYMBOL(memset) ; EXPORT_SYMBOL(__memset)
>> 
>> I notice in looking at the diff of preprocessed source we end up
>> invoking an asm macro that doesn't seem to have a full final argument, I
>> wonder if that's relevant...
>> 
>> -___EXPORT_SYMBOL __memset, __memset, ; ___EXPORT_SYMBOL memset, memset,
>> +___EXPORT_SYMBOL __memset, __memset,
>> +___EXPORT_SYMBOL memset, memset,
>> 
>> I also notice that nowhere else in the source do people have multiple
>> EXPORT_SYMBOLs on the same line, and other arches seem to just
>> unconditionally export both symbols on multiple lines.
>> 
>> I have no idea how this works for you - maybe it's affected by something 32bit.
>> 
>> How would you feel about this approach instead? I'm not tied to any of
>> the names or anything.
>> 
>> diff --git a/arch/powerpc/include/asm/ppc_asm.h b/arch/powerpc/include/asm/ppc_asm.h
>> index e0637730a8e7..7b6a91b448dd 100644
>> --- a/arch/powerpc/include/asm/ppc_asm.h
>> +++ b/arch/powerpc/include/asm/ppc_asm.h
>> @@ -214,6 +214,9 @@ name: \
>>   
>>   #define DOTSYM(a)      a
>>   
>> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
>> +       .weak weakname ; .set weakname, strongname ;
>> +
>>   #else
>>   
>>   #define XGLUE(a,b) a##b
>> @@ -236,6 +239,10 @@ GLUE(.,name):
>>   
>>   #define DOTSYM(a)      GLUE(.,a)
>>   
>> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
>> +       .weak weakname ; .set weakname, strongname ; \
>> +       .weak DOTSYM(weakname) ; .set DOTSYM(weakname), DOTSYM(strongname) ;
>> +
>>   #endif
>>   
>>   #else /* 32-bit */
>> @@ -251,6 +258,9 @@ GLUE(.,name):
>>   
>>   #define _GLOBAL_TOC(name) _GLOBAL(name)
>>   
>> +#define PROVIDE_WEAK_ALIAS(strongname, weakname) \
>> +       .weak weakname ; .set weakname, strongname ;
>> +
>>   #endif
>>   
>>   /*
>> --- a/arch/powerpc/lib/mem_64.S
>> +++ b/arch/powerpc/lib/mem_64.S
>> @@ -33,7 +33,8 @@ EXPORT_SYMBOL(__memset32)
>>   EXPORT_SYMBOL(__memset64)
>>   #endif
>>   
>> -_GLOBAL_KASAN(memset)
>> +PROVIDE_WEAK_ALIAS(__memset,memset)
>> +_GLOBAL(__memset)
>>          neg     r0,r3
>>          rlwimi  r4,r4,8,16,23
>>          andi.   r0,r0,7                 /* # bytes to be 8-byte aligned */
>> @@ -98,9 +99,11 @@ _GLOBAL_KASAN(memset)
>>   10:    bflr    31
>>          stb     r4,0(r6)
>>          blr
>> -EXPORT_SYMBOL_KASAN(memset)
>> +EXPORT_SYMBOL(memset)
>> +EXPORT_SYMBOL(__memset)
>>   
>> -_GLOBAL_TOC_KASAN(memmove)
>> +PROVIDE_WEAK_ALIAS(__memmove,memove)
>> +_GLOBAL_TOC(__memmove)
>>          cmplw   0,r3,r4
>>          bgt     backwards_memcpy
>>          b       memcpy
>> @@ -141,4 +144,5 @@ _GLOBAL(backwards_memcpy)
>>          beq     2b
>>          mtctr   r7
>>          b       1b
>> -EXPORT_SYMBOL_KASAN(memmove)
>> +EXPORT_SYMBOL(memmove)
>> +EXPORT_SYMBOL(__memmove)
>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>> index 862b515b8868..7c1b09556cad 100644
>> --- a/arch/powerpc/lib/memcpy_64.S
>> +++ b/arch/powerpc/lib/memcpy_64.S
>> @@ -19,7 +19,8 @@
>>   #endif
>>   
>>          .align  7
>> -_GLOBAL_TOC_KASAN(memcpy)
>> +PROVIDE_WEAK_ALIAS(__memcpy,memcpy)
>> +_GLOBAL_TOC(__memcpy)
>>   BEGIN_FTR_SECTION
>>   #ifdef __LITTLE_ENDIAN__
>>          cmpdi   cr7,r5,0
>> @@ -230,4 +231,5 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>   4:     ld      r3,-STACKFRAMESIZE+STK_REG(R31)(r1)     /* return dest pointer */
>>          blr
>>   #endif
>> -EXPORT_SYMBOL_KASAN(memcpy)
>> +EXPORT_SYMBOL(__memcpy)
>> +EXPORT_SYMBOL(memcpy)
>> 
>> 
>> Regards,
>> Daniel
>> 
>> 
>>> +#else
>>> +#define _GLOBAL_KASAN(fn)	_GLOBAL(fn)
>>> +#define _GLOBAL_TOC_KASAN(fn)	_GLOBAL_TOC(fn)
>>> +#define EXPORT_SYMBOL_KASAN(fn)	EXPORT_SYMBOL(fn)
>>> +#endif
>>> +
>>> +#endif
>>> diff --git a/arch/powerpc/include/asm/string.h b/arch/powerpc/include/asm/string.h
>>> index 1647de15a31e..9bf6dffb4090 100644
>>> --- a/arch/powerpc/include/asm/string.h
>>> +++ b/arch/powerpc/include/asm/string.h
>>> @@ -4,14 +4,17 @@
>>>   
>>>   #ifdef __KERNEL__
>>>   
>>> +#ifndef CONFIG_KASAN
>>>   #define __HAVE_ARCH_STRNCPY
>>>   #define __HAVE_ARCH_STRNCMP
>>> +#define __HAVE_ARCH_MEMCHR
>>> +#define __HAVE_ARCH_MEMCMP
>>> +#define __HAVE_ARCH_MEMSET16
>>> +#endif
>>> +
>>>   #define __HAVE_ARCH_MEMSET
>>>   #define __HAVE_ARCH_MEMCPY
>>>   #define __HAVE_ARCH_MEMMOVE
>>> -#define __HAVE_ARCH_MEMCMP
>>> -#define __HAVE_ARCH_MEMCHR
>>> -#define __HAVE_ARCH_MEMSET16
>>>   #define __HAVE_ARCH_MEMCPY_FLUSHCACHE
>>>   
>>>   extern char * strcpy(char *,const char *);
>>> @@ -27,7 +30,27 @@ extern int memcmp(const void *,const void *,__kernel_size_t);
>>>   extern void * memchr(const void *,int,__kernel_size_t);
>>>   extern void * memcpy_flushcache(void *,const void *,__kernel_size_t);
>>>   
>>> +void *__memset(void *s, int c, __kernel_size_t count);
>>> +void *__memcpy(void *to, const void *from, __kernel_size_t n);
>>> +void *__memmove(void *to, const void *from, __kernel_size_t n);
>>> +
>>> +#if defined(CONFIG_KASAN) && !defined(__SANITIZE_ADDRESS__)
>>> +/*
>>> + * For files that are not instrumented (e.g. mm/slub.c) we
>>> + * should use not instrumented version of mem* functions.
>>> + */
>>> +#define memcpy(dst, src, len) __memcpy(dst, src, len)
>>> +#define memmove(dst, src, len) __memmove(dst, src, len)
>>> +#define memset(s, c, n) __memset(s, c, n)
>>> +
>>> +#ifndef __NO_FORTIFY
>>> +#define __NO_FORTIFY /* FORTIFY_SOURCE uses __builtin_memcpy, etc. */
>>> +#endif
>>> +
>>> +#endif
>>> +
>>>   #ifdef CONFIG_PPC64
>>> +#ifndef CONFIG_KASAN
>>>   #define __HAVE_ARCH_MEMSET32
>>>   #define __HAVE_ARCH_MEMSET64
>>>   
>>> @@ -49,8 +72,11 @@ static inline void *memset64(uint64_t *p, uint64_t v, __kernel_size_t n)
>>>   {
>>>   	return __memset64(p, v, n * 8);
>>>   }
>>> +#endif
>>>   #else
>>> +#ifndef CONFIG_KASAN
>>>   #define __HAVE_ARCH_STRLEN
>>> +#endif
>>>   
>>>   extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
>>>   #endif
>>> diff --git a/arch/powerpc/kernel/prom_init_check.sh b/arch/powerpc/kernel/prom_init_check.sh
>>> index 667df97d2595..181fd10008ef 100644
>>> --- a/arch/powerpc/kernel/prom_init_check.sh
>>> +++ b/arch/powerpc/kernel/prom_init_check.sh
>>> @@ -16,8 +16,16 @@
>>>   # If you really need to reference something from prom_init.o add
>>>   # it to the list below:
>>>   
>>> +grep "^CONFIG_KASAN=y$" .config >/dev/null
>>> +if [ $? -eq 0 ]
>>> +then
>>> +	MEM_FUNCS="__memcpy __memset"
>>> +else
>>> +	MEM_FUNCS="memcpy memset"
>>> +fi
>>> +
>>>   WHITELIST="add_reloc_offset __bss_start __bss_stop copy_and_flush
>>> -_end enter_prom memcpy memset reloc_offset __secondary_hold
>>> +_end enter_prom $MEM_FUNCS reloc_offset __secondary_hold
>>>   __secondary_hold_acknowledge __secondary_hold_spinloop __start
>>>   strcmp strcpy strlcpy strlen strncmp strstr kstrtobool logo_linux_clut224
>>>   reloc_got2 kernstart_addr memstart_addr linux_banner _stext
>>> diff --git a/arch/powerpc/lib/Makefile b/arch/powerpc/lib/Makefile
>>> index 79396e184bca..47a4de434c22 100644
>>> --- a/arch/powerpc/lib/Makefile
>>> +++ b/arch/powerpc/lib/Makefile
>>> @@ -8,9 +8,14 @@ ccflags-$(CONFIG_PPC64)	:= $(NO_MINIMAL_TOC)
>>>   CFLAGS_REMOVE_code-patching.o = $(CC_FLAGS_FTRACE)
>>>   CFLAGS_REMOVE_feature-fixups.o = $(CC_FLAGS_FTRACE)
>>>   
>>> -obj-y += string.o alloc.o code-patching.o feature-fixups.o
>>> +obj-y += alloc.o code-patching.o feature-fixups.o
>>>   
>>> -obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o strlen_32.o
>>> +ifndef CONFIG_KASAN
>>> +obj-y	+=	string.o memcmp_$(BITS).o
>>> +obj-$(CONFIG_PPC32)	+= strlen_32.o
>>> +endif
>>> +
>>> +obj-$(CONFIG_PPC32)	+= div64.o copy_32.o crtsavres.o
>>>   
>>>   obj-$(CONFIG_FUNCTION_ERROR_INJECTION)	+= error-inject.o
>>>   
>>> @@ -34,7 +39,7 @@ obj64-$(CONFIG_KPROBES_SANITY_TEST)	+= test_emulate_step.o \
>>>   					   test_emulate_step_exec_instr.o
>>>   
>>>   obj-y			+= checksum_$(BITS).o checksum_wrappers.o \
>>> -			   string_$(BITS).o memcmp_$(BITS).o
>>> +			   string_$(BITS).o
>>>   
>>>   obj-y			+= sstep.o ldstfp.o quad.o
>>>   obj64-y			+= quad.o
>>> diff --git a/arch/powerpc/lib/copy_32.S b/arch/powerpc/lib/copy_32.S
>>> index ba66846fe973..fc4fa7246200 100644
>>> --- a/arch/powerpc/lib/copy_32.S
>>> +++ b/arch/powerpc/lib/copy_32.S
>>> @@ -14,6 +14,7 @@
>>>   #include <asm/ppc_asm.h>
>>>   #include <asm/export.h>
>>>   #include <asm/code-patching-asm.h>
>>> +#include <asm/kasan.h>
>>>   
>>>   #define COPY_16_BYTES		\
>>>   	lwz	r7,4(r4);	\
>>> @@ -68,6 +69,7 @@ CACHELINE_BYTES = L1_CACHE_BYTES
>>>   LG_CACHELINE_BYTES = L1_CACHE_SHIFT
>>>   CACHELINE_MASK = (L1_CACHE_BYTES-1)
>>>   
>>> +#ifndef CONFIG_KASAN
>>>   _GLOBAL(memset16)
>>>   	rlwinm.	r0 ,r5, 31, 1, 31
>>>   	addi	r6, r3, -4
>>> @@ -81,6 +83,7 @@ _GLOBAL(memset16)
>>>   	sth	r4, 4(r6)
>>>   	blr
>>>   EXPORT_SYMBOL(memset16)
>>> +#endif
>>>   
>>>   /*
>>>    * Use dcbz on the complete cache lines in the destination
>>> @@ -91,7 +94,7 @@ EXPORT_SYMBOL(memset16)
>>>    * We therefore skip the optimised bloc that uses dcbz. This jump is
>>>    * replaced by a nop once cache is active. This is done in machine_init()
>>>    */
>>> -_GLOBAL(memset)
>>> +_GLOBAL_KASAN(memset)
>>>   	cmplwi	0,r5,4
>>>   	blt	7f
>>>   
>>> @@ -150,7 +153,7 @@ _GLOBAL(memset)
>>>   9:	stbu	r4,1(r6)
>>>   	bdnz	9b
>>>   	blr
>>> -EXPORT_SYMBOL(memset)
>>> +EXPORT_SYMBOL_KASAN(memset)
>>>   
>>>   /*
>>>    * This version uses dcbz on the complete cache lines in the
>>> @@ -163,12 +166,12 @@ EXPORT_SYMBOL(memset)
>>>    * We therefore jump to generic_memcpy which doesn't use dcbz. This jump is
>>>    * replaced by a nop once cache is active. This is done in machine_init()
>>>    */
>>> -_GLOBAL(memmove)
>>> +_GLOBAL_KASAN(memmove)
>>>   	cmplw	0,r3,r4
>>>   	bgt	backwards_memcpy
>>>   	/* fall through */
>>>   
>>> -_GLOBAL(memcpy)
>>> +_GLOBAL_KASAN(memcpy)
>>>   1:	b	generic_memcpy
>>>   	patch_site	1b, patch__memcpy_nocache
>>>   
>>> @@ -242,8 +245,8 @@ _GLOBAL(memcpy)
>>>   	stbu	r0,1(r6)
>>>   	bdnz	40b
>>>   65:	blr
>>> -EXPORT_SYMBOL(memcpy)
>>> -EXPORT_SYMBOL(memmove)
>>> +EXPORT_SYMBOL_KASAN(memcpy)
>>> +EXPORT_SYMBOL_KASAN(memmove)
>>>   
>>>   generic_memcpy:
>>>   	srwi.	r7,r5,3
>>> diff --git a/arch/powerpc/lib/mem_64.S b/arch/powerpc/lib/mem_64.S
>>> index 3c3be02f33b7..7cd6cf6822a2 100644
>>> --- a/arch/powerpc/lib/mem_64.S
>>> +++ b/arch/powerpc/lib/mem_64.S
>>> @@ -12,7 +12,9 @@
>>>   #include <asm/errno.h>
>>>   #include <asm/ppc_asm.h>
>>>   #include <asm/export.h>
>>> +#include <asm/kasan.h>
>>>   
>>> +#ifndef CONFIG_KASAN
>>>   _GLOBAL(__memset16)
>>>   	rlwimi	r4,r4,16,0,15
>>>   	/* fall through */
>>> @@ -29,8 +31,9 @@ _GLOBAL(__memset64)
>>>   EXPORT_SYMBOL(__memset16)
>>>   EXPORT_SYMBOL(__memset32)
>>>   EXPORT_SYMBOL(__memset64)
>>> +#endif
>>>   
>>> -_GLOBAL(memset)
>>> +_GLOBAL_KASAN(memset)
>>>   	neg	r0,r3
>>>   	rlwimi	r4,r4,8,16,23
>>>   	andi.	r0,r0,7			/* # bytes to be 8-byte aligned */
>>> @@ -95,9 +98,9 @@ _GLOBAL(memset)
>>>   10:	bflr	31
>>>   	stb	r4,0(r6)
>>>   	blr
>>> -EXPORT_SYMBOL(memset)
>>> +EXPORT_SYMBOL_KASAN(memset)
>>>   
>>> -_GLOBAL_TOC(memmove)
>>> +_GLOBAL_TOC_KASAN(memmove)
>>>   	cmplw	0,r3,r4
>>>   	bgt	backwards_memcpy
>>>   	b	memcpy
>>> @@ -138,4 +141,4 @@ _GLOBAL(backwards_memcpy)
>>>   	beq	2b
>>>   	mtctr	r7
>>>   	b	1b
>>> -EXPORT_SYMBOL(memmove)
>>> +EXPORT_SYMBOL_KASAN(memmove)
>>> diff --git a/arch/powerpc/lib/memcpy_64.S b/arch/powerpc/lib/memcpy_64.S
>>> index 273ea67e60a1..862b515b8868 100644
>>> --- a/arch/powerpc/lib/memcpy_64.S
>>> +++ b/arch/powerpc/lib/memcpy_64.S
>>> @@ -11,6 +11,7 @@
>>>   #include <asm/export.h>
>>>   #include <asm/asm-compat.h>
>>>   #include <asm/feature-fixups.h>
>>> +#include <asm/kasan.h>
>>>   
>>>   #ifndef SELFTEST_CASE
>>>   /* For big-endian, 0 == most CPUs, 1 == POWER6, 2 == Cell */
>>> @@ -18,7 +19,7 @@
>>>   #endif
>>>   
>>>   	.align	7
>>> -_GLOBAL_TOC(memcpy)
>>> +_GLOBAL_TOC_KASAN(memcpy)
>>>   BEGIN_FTR_SECTION
>>>   #ifdef __LITTLE_ENDIAN__
>>>   	cmpdi	cr7,r5,0
>>> @@ -229,4 +230,4 @@ END_FTR_SECTION_IFCLR(CPU_FTR_UNALIGNED_LD_STD)
>>>   4:	ld	r3,-STACKFRAMESIZE+STK_REG(R31)(r1)	/* return dest pointer */
>>>   	blr
>>>   #endif
>>> -EXPORT_SYMBOL(memcpy)
>>> +EXPORT_SYMBOL_KASAN(memcpy)
>>> -- 
>>> 2.13.3