[PATCH 0/7] DT: consolidate bootmem support

[PATCH 0/7] DT: consolidate bootmem support

[Rob Herring]

This series adds support for bootmem to the DT core code and removes the
remaining arch specific early_init_dt_alloc_memory_arch implementations.

Compile tested only on arm64, mips, x86, and xtensa.

Rob

Rob Herring (7):
  of/fdt: use memblock_virt_alloc for early alloc
  cris: remove arch specific early DT functions
  metag: remove arch specific early DT functions
  mips: remove arch specific early_init_dt_alloc_memory_arch
  nios2: remove arch specific early_init_dt_alloc_memory_arch
  x86: remove arch specific early_init_dt_alloc_memory_arch
  xtensa: remove arch specific early DT functions

 arch/cris/kernel/Makefile     | 19 -------------------
 arch/cris/kernel/devicetree.c | 15 ---------------
 arch/metag/kernel/devtree.c   | 14 --------------
 arch/mips/kernel/prom.c       |  5 -----
 arch/nios2/kernel/prom.c      |  5 -----
 arch/x86/kernel/devicetree.c  |  6 ------
 arch/xtensa/kernel/setup.c    | 12 ------------
 drivers/of/fdt.c              | 16 ++++------------
 drivers/of/unittest.c         | 11 ++++++++---
 include/linux/of_fdt.h        |  1 -
 10 files changed, 12 insertions(+), 92 deletions(-)
 delete mode 100644 arch/cris/kernel/devicetree.c

--
2.14.1

[PATCH 1/7] of/fdt: use memblock_virt_alloc for early alloc

[Rob Herring]

memblock_virt_alloc() works for both memblock and bootmem, so use it and
make early_init_dt_alloc_memory_arch a static function. The arches using
bootmem define early_init_dt_alloc_memory_arch as either:

__alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS))

or:

alloc_bootmem_align(size, align)

Both of these evaluate to the same thing as does memblock_virt_alloc for
bootmem. So we can disable the arch specific functions by making
early_init_dt_alloc_memory_arch static and they can be removed in
subsequent commits.

Cc: Frank Rowand <frowand.list@gmail.com>
Signed-off-by: Rob Herring <robh@kernel.org>
---
 drivers/of/fdt.c       | 16 ++++------------
 drivers/of/unittest.c  | 11 ++++++++---
 include/linux/of_fdt.h |  1 -
 3 files changed, 12 insertions(+), 16 deletions(-)

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index 4675e5ac4d11..444e65aa0d29 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -14,6 +14,7 @@
 #include <linux/crc32.h>
 #include <linux/kernel.h>
 #include <linux/initrd.h>
+#include <linux/bootmem.h>
 #include <linux/memblock.h>
 #include <linux/mutex.h>
 #include <linux/of.h>
@@ -1183,14 +1184,6 @@ int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
 	return memblock_reserve(base, size);
 }

-/*
- * called from unflatten_device_tree() to bootstrap devicetree itself
- * Architectures can override this definition if memblock isn't used
- */
-void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return __va(memblock_alloc(size, align));
-}
 #else
 void __init __weak early_init_dt_add_memory_arch(u64 base, u64 size)
 {
@@ -1209,13 +1202,12 @@ int __init __weak early_init_dt_reserve_memory_arch(phys_addr_t base,
 		  &base, &size, nomap ? " (nomap)" : "");
 	return -ENOSYS;
 }
+#endif

-void * __init __weak early_init_dt_alloc_memory_arch(u64 size, u64 align)
+static void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
 {
-	WARN_ON(1);
-	return NULL;
+	return memblock_virt_alloc(size, align);
 }
-#endif

 bool __init early_init_dt_verify(void *params)
 {
diff --git a/drivers/of/unittest.c b/drivers/of/unittest.c
index 0f8052f1355c..7a9abaae874d 100644
--- a/drivers/of/unittest.c
+++ b/drivers/of/unittest.c
@@ -5,6 +5,7 @@

 #define pr_fmt(fmt) "### dt-test ### " fmt

+#include <linux/bootmem.h>
 #include <linux/clk.h>
 #include <linux/err.h>
 #include <linux/errno.h>
@@ -2053,6 +2054,11 @@ static struct overlay_info overlays[] = {

 static struct device_node *overlay_base_root;

+static void * __init dt_alloc_memory(u64 size, u64 align)
+{
+	return memblock_virt_alloc(size, align);
+}
+
 /*
  * Create base device tree for the overlay unittest.
  *
@@ -2092,8 +2098,7 @@ void __init unittest_unflatten_overlay_base(void)
 		return;
 	}

-	info->data = early_init_dt_alloc_memory_arch(size,
-					     roundup_pow_of_two(FDT_V17_SIZE));
+	info->data = dt_alloc_memory(size, roundup_pow_of_two(FDT_V17_SIZE));
 	if (!info->data) {
 		pr_err("alloc for dtb 'overlay_base' failed");
 		return;
@@ -2102,7 +2107,7 @@ void __init unittest_unflatten_overlay_base(void)
 	memcpy(info->data, info->dtb_begin, size);

 	__unflatten_device_tree(info->data, NULL, &info->np_overlay,
-				early_init_dt_alloc_memory_arch, true);
+				dt_alloc_memory, true);
 	overlay_base_root = info->np_overlay;
 }

diff --git a/include/linux/of_fdt.h b/include/linux/of_fdt.h
index 444e6e283828..02c05028d0ba 100644
--- a/include/linux/of_fdt.h
+++ b/include/linux/of_fdt.h
@@ -83,7 +83,6 @@ extern void early_init_dt_add_memory_arch(u64 base, u64 size);
 extern int early_init_dt_mark_hotplug_memory_arch(u64 base, u64 size);
 extern int early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
 					     bool no_map);
-extern void * early_init_dt_alloc_memory_arch(u64 size, u64 align);
 extern u64 dt_mem_next_cell(int s, const __be32 **cellp);

 /* Early flat tree scan hooks */
--
2.14.1

[PATCH 2/7] cris: remove arch specific early DT functions

[Rob Herring]

Now that the DT core code handles bootmem arches, we can remove the cris
specific early_init_dt_alloc_memory_arch function. As the default
early_init_dt_add_memory_arch just does a WARN, we can just remove the
entire devicetree.c file.

Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Cc: linux-cris-kernel@axis.com
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is dependent on patch 1. Please ack and I'll take or apply after
4.16-rc1.

 arch/cris/kernel/Makefile     | 19 -------------------
 arch/cris/kernel/devicetree.c | 15 ---------------
 2 files changed, 34 deletions(-)
 delete mode 100644 arch/cris/kernel/devicetree.c

diff --git a/arch/cris/kernel/Makefile b/arch/cris/kernel/Makefile
index af075a5fb9aa..e69de29bb2d1 100644
--- a/arch/cris/kernel/Makefile
+++ b/arch/cris/kernel/Makefile
@@ -1,19 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-# $Id: Makefile,v 1.12 2004/10/19 13:07:43 starvik Exp $
-#
-# Makefile for the linux kernel.
-#
-
-CPPFLAGS_vmlinux.lds := -DDRAM_VIRTUAL_BASE=0x$(CONFIG_ETRAX_DRAM_VIRTUAL_BASE)
-extra-y	:= vmlinux.lds
-
-obj-y   := process.o traps.o irq.o ptrace.o setup.o time.o sys_cris.o
-obj-y += devicetree.o
-obj-y += stacktrace.o
-
-obj-$(CONFIG_MODULES)    += crisksyms.o
-obj-$(CONFIG_MODULES)	 += module.o
-obj-$(CONFIG_SYSTEM_PROFILER)   += profile.o
-
-clean:
-
diff --git a/arch/cris/kernel/devicetree.c b/arch/cris/kernel/devicetree.c
deleted file mode 100644
index 36e1c658229f..000000000000
--- a/arch/cris/kernel/devicetree.c
+++ /dev/null
@@ -1,15 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-#include <linux/init.h>
-#include <linux/bootmem.h>
-#include <linux/printk.h>
-
-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
-	pr_err("%s(%llx, %llx)\n",
-	       __func__, base, size);
-}
-
-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return alloc_bootmem_align(size, align);
-}
--
2.14.1

[PATCH 3/7] metag: remove arch specific early DT functions

[Rob Herring]

Now that the DT core code handles bootmem arches, we can remove the metag
specific early_init_dt_alloc_memory_arch function. As the default
early_init_dt_add_memory_arch just does a WARN, we can remove it too.

Cc: James Hogan <jhogan@kernel.org>
Cc: linux-metag@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is dependent on patch 1. Please ack and I'll take or apply after
4.16-rc1.

 arch/metag/kernel/devtree.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/arch/metag/kernel/devtree.c b/arch/metag/kernel/devtree.c
index 18dd7aea9fdc..6af749a64438 100644
--- a/arch/metag/kernel/devtree.c
+++ b/arch/metag/kernel/devtree.c
@@ -14,26 +14,12 @@
 #include <linux/init.h>
 #include <linux/export.h>
 #include <linux/types.h>
-#include <linux/bootmem.h>
-#include <linux/memblock.h>
-#include <linux/of.h>
 #include <linux/of_fdt.h>

 #include <asm/setup.h>
 #include <asm/page.h>
 #include <asm/mach/arch.h>

-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
-	pr_err("%s(%llx, %llx)\n",
-	       __func__, base, size);
-}
-
-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return alloc_bootmem_align(size, align);
-}
-
 static const void * __init arch_get_next_mach(const char *const **match)
 {
 	static const struct machine_desc *mdesc = __arch_info_begin;
--
2.14.1

[PATCH 4/7] mips: remove arch specific early_init_dt_alloc_memory_arch

[Rob Herring]

Now that the DT core code handles bootmem arches, we can remove the MIPS
specific early_init_dt_alloc_memory_arch function.

Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is dependent on patch 1. Please ack and I'll take or apply after
4.16-rc1.

 arch/mips/kernel/prom.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/mips/kernel/prom.c b/arch/mips/kernel/prom.c
index 0dbcd152a1a9..89950b7bf536 100644
--- a/arch/mips/kernel/prom.c
+++ b/arch/mips/kernel/prom.c
@@ -44,11 +44,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 	return add_memory_region(base, size, BOOT_MEM_RAM);
 }

-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
-}
-
 int __init early_init_dt_reserve_memory_arch(phys_addr_t base,
 					phys_addr_t size, bool nomap)
 {
--
2.14.1

[PATCH 5/7] nios2: remove arch specific early_init_dt_alloc_memory_arch

[Rob Herring]

Now that the DT core code handles bootmem arches, we can remove the nios2
specific early_init_dt_alloc_memory_arch function.

Cc: Ley Foon Tan <lftan@altera.com>
Cc: nios2-dev@lists.rocketboards.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is dependent on patch 1. Please ack and I'll take or apply after
4.16-rc1.

 arch/nios2/kernel/prom.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/arch/nios2/kernel/prom.c b/arch/nios2/kernel/prom.c
index 6688576b3a47..8d7446a4b475 100644
--- a/arch/nios2/kernel/prom.c
+++ b/arch/nios2/kernel/prom.c
@@ -42,11 +42,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)

 }

-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return alloc_bootmem_align(size, align);
-}
-
 int __init early_init_dt_reserve_memory_arch(phys_addr_t base, phys_addr_t size,
 					     bool nomap)
 {
--
2.14.1

[PATCH 6/7] x86: remove arch specific early_init_dt_alloc_memory_arch

[Rob Herring]

Now that the DT core code handles bootmem arches, we can remove the x86
specific early_init_dt_alloc_memory_arch function.

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: x86@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is dependent on patch 1. Please ack and I'll take or apply after
4.16-rc1.

 arch/x86/kernel/devicetree.c | 6 ------
 1 file changed, 6 deletions(-)

diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c
index 76e07698e6d1..25de5f6ca997 100644
--- a/arch/x86/kernel/devicetree.c
+++ b/arch/x86/kernel/devicetree.c
@@ -2,7 +2,6 @@
 /*
  * Architecture specific OF callbacks.
  */
-#include <linux/bootmem.h>
 #include <linux/export.h>
 #include <linux/io.h>
 #include <linux/interrupt.h>
@@ -39,11 +38,6 @@ void __init early_init_dt_add_memory_arch(u64 base, u64 size)
 	BUG();
 }

-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return __alloc_bootmem(size, align, __pa(MAX_DMA_ADDRESS));
-}
-
 void __init add_dtb(u64 data)
 {
 	initial_dtb = data + offsetof(struct setup_data, data);
--
2.14.1

[PATCH 7/7] xtensa: remove arch specific early DT functions

[Rob Herring]

Now that the DT core code handles bootmem arches, we can remove the xtensa
specific early_init_dt_alloc_memory_arch function. The common
early_init_dt_add_memory_arch can be used too now that xtensa switched to
memblock.

Cc: Chris Zankel <chris@zankel.net>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Cc: linux-xtensa@linux-xtensa.org
Signed-off-by: Rob Herring <robh@kernel.org>
---
This is dependent on patch 1. Please ack and I'll take or apply after
4.16-rc1.

 arch/xtensa/kernel/setup.c | 12 ------------
 1 file changed, 12 deletions(-)

diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
index 08175df7a69e..82bd1a94157c 100644
--- a/arch/xtensa/kernel/setup.c
+++ b/arch/xtensa/kernel/setup.c
@@ -20,7 +20,6 @@
 #include <linux/mm.h>
 #include <linux/proc_fs.h>
 #include <linux/screen_info.h>
-#include <linux/bootmem.h>
 #include <linux/kernel.h>
 #include <linux/percpu.h>
 #include <linux/cpu.h>
@@ -218,17 +217,6 @@ static int __init xtensa_dt_io_area(unsigned long node, const char *uname,
 }
 #endif

-void __init early_init_dt_add_memory_arch(u64 base, u64 size)
-{
-	size &= PAGE_MASK;
-	memblock_add(base, size);
-}
-
-void * __init early_init_dt_alloc_memory_arch(u64 size, u64 align)
-{
-	return __alloc_bootmem(size, align, 0);
-}
-
 void __init early_init_devtree(void *params)
 {
 	early_init_dt_scan(params);
--
2.14.1

Re: [PATCH 7/7] xtensa: remove arch specific early DT functions

[Max Filippov]

Hi Rob,

On Fri, Jan 5, 2018 at 3:20 PM, Rob Herring <robh@kernel.org> wrote:
> Now that the DT core code handles bootmem arches, we can remove the xtensa
> specific early_init_dt_alloc_memory_arch function. The common
> early_init_dt_add_memory_arch can be used too now that xtensa switched to
> memblock.
>
> Cc: Chris Zankel <chris@zankel.net>
> Cc: Max Filippov <jcmvbkbc@gmail.com>
> Cc: linux-xtensa@linux-xtensa.org
> Signed-off-by: Rob Herring <robh@kernel.org>
> ---
> This is dependent on patch 1. Please ack and I'll take or apply after
> 4.16-rc1.
>
>  arch/xtensa/kernel/setup.c | 12 ------------
>  1 file changed, 12 deletions(-)

Acked-by: Max Filippov <jcmvbkbc@gmail.com>

-- 
Thanks.
-- Max

Re: [PATCH 5/7] nios2: remove arch specific early_init_dt_alloc_memory_arch

[Tobias Klauser]

On 2018-01-06 at 00:20:52 +0100, Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org> wrote:
> Now that the DT core code handles bootmem arches, we can remove the nios2
> specific early_init_dt_alloc_memory_arch function.
> 
> Cc: Ley Foon Tan <lftan-EIB2kfCEclfQT0dZR+AlfA@public.gmane.org>
> Cc: nios2-dev-g9ZBwUv/Ih/yUk5EbOjzuce+I+R0W71w@public.gmane.org
> Signed-off-by: Rob Herring <robh-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org>

Reviewed-by: Tobias Klauser <tklauser-93Khv+1bN0NyDzI6CaY1VQ@public.gmane.org>
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