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authorChristophe Leroy <christophe.leroy@c-s.fr>2017-08-02 15:51:05 +0200
committerMichael Ellerman <mpe@ellerman.id.au>2017-08-15 22:55:57 +1000
commit95902e6c8864d39b09134dcaa3c99d8161d1deea (patch)
treecb41417a8e6436b46a3b504fe73641b4234d5262 /arch/powerpc/kernel/vmlinux.lds.S
parent3184cc4b6f6a1dc0c1745aafe2b14b1206ef3187 (diff)
powerpc/mm: Implement STRICT_KERNEL_RWX on PPC32
This patch implements STRICT_KERNEL_RWX on PPC32. As for CONFIG_DEBUG_PAGEALLOC, it deactivates BAT and LTLB mappings in order to allow page protection setup at the level of each page. As BAT/LTLB mappings are deactivated, there might be a performance impact. Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/kernel/vmlinux.lds.S')
-rw-r--r--arch/powerpc/kernel/vmlinux.lds.S2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index b1a250560198..882628fa6987 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -8,7 +8,7 @@
#include <asm/cache.h>
#include <asm/thread_info.h>
-#ifdef CONFIG_STRICT_KERNEL_RWX
+#if defined(CONFIG_STRICT_KERNEL_RWX) && !defined(CONFIG_PPC32)
#define STRICT_ALIGN_SIZE (1 << 24)
#else
#define STRICT_ALIGN_SIZE PAGE_SIZE