From: Christophe Leroy <christophe.leroy@csgroup.eu>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>
Cc: Christophe Leroy <christophe.leroy@csgroup.eu>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v1 1/8] powerpc/booke: Disable STRICT_KERNEL_RWX, DEBUG_PAGEALLOC and KFENCE
Date: Fri, 15 Oct 2021 12:02:42 +0200 [thread overview]
Message-ID: <d1ad9fdd9b27da3fdfa16510bb542ed51fa6e134.1634292136.git.christophe.leroy@csgroup.eu> (raw)
fsl_booke and 44x are not able to map kernel linear memory with
pages, so they can't support DEBUG_PAGEALLOC and KFENCE, and
STRICT_KERNEL_RWX is also a problem for now.
Enable those only on book3s (both 32 and 64 except KFENCE), 8xx and 40x.
Fixes: 88df6e90fa97 ("[POWERPC] DEBUG_PAGEALLOC for 32-bit")
Fixes: 95902e6c8864 ("powerpc/mm: Implement STRICT_KERNEL_RWX on PPC32")
Fixes: 90cbac0e995d ("powerpc: Enable KFENCE for PPC32")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
---
arch/powerpc/Kconfig | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index ba5b66189358..6b9f523882c5 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -138,7 +138,7 @@ config PPC
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE && PPC_BOOK3S_64
select ARCH_HAS_SET_MEMORY
- select ARCH_HAS_STRICT_KERNEL_RWX if ((PPC_BOOK3S_64 || PPC32) && !HIBERNATION)
+ select ARCH_HAS_STRICT_KERNEL_RWX if (PPC_BOOK3S || PPC_8xx || 40x) && !HIBERNATION
select ARCH_HAS_STRICT_MODULE_RWX if ARCH_HAS_STRICT_KERNEL_RWX && !PPC_BOOK3S_32
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAS_UACCESS_FLUSHCACHE
@@ -150,7 +150,7 @@ config PPC
select ARCH_OPTIONAL_KERNEL_RWX if ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_STACKWALK
select ARCH_SUPPORTS_ATOMIC_RMW
- select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC32 || PPC_BOOK3S_64
+ select ARCH_SUPPORTS_DEBUG_PAGEALLOC if PPC_BOOK3S || PPC_8xx || 40x
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF if PPC64
select ARCH_USE_MEMTEST
@@ -190,7 +190,7 @@ config PPC
select HAVE_ARCH_JUMP_LABEL_RELATIVE
select HAVE_ARCH_KASAN if PPC32 && PPC_PAGE_SHIFT <= 14
select HAVE_ARCH_KASAN_VMALLOC if PPC32 && PPC_PAGE_SHIFT <= 14
- select HAVE_ARCH_KFENCE if PPC32
+ select HAVE_ARCH_KFENCE if PPC_BOOK3S_32 || PPC_8xx || 40x
select HAVE_ARCH_KGDB
select HAVE_ARCH_MMAP_RND_BITS
select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT
--
2.31.1
next reply other threads:[~2021-10-15 10:03 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-15 10:02 Christophe Leroy [this message]
2021-10-15 10:02 ` [PATCH v1 2/8] powerpc/fsl_booke: Rename fsl_booke.c to fsl_book3e.c Christophe Leroy
2021-10-15 10:02 ` [PATCH v1 3/8] powerpc/fsl_booke: Take exec flag into account when setting TLBCAMs Christophe Leroy
2021-10-15 10:02 ` [PATCH v1 4/8] powerpc/fsl_booke: Enable reloading of TLBCAM without switching to AS1 Christophe Leroy
2021-10-15 10:02 ` [PATCH v1 5/8] powerpc/fsl_booke: Tell map_mem_in_cams() if init is done Christophe Leroy
2021-10-15 10:02 ` [PATCH v1 6/8] powerpc/fsl_booke: Allocate separate TLBCAMs for readonly memory Christophe Leroy
2021-10-15 10:02 ` [PATCH v1 7/8] powerpc/fsl_booke: Update of TLBCAMs after init Christophe Leroy
2021-10-15 10:02 ` [PATCH v1 8/8] powerpc/fsl_booke: Enable STRICT_KERNEL_RWX Christophe Leroy
2021-11-02 10:11 ` [PATCH v1 1/8] powerpc/booke: Disable STRICT_KERNEL_RWX, DEBUG_PAGEALLOC and KFENCE Michael Ellerman
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