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authorLaura Abbott <lauraa@codeaurora.org>2015-01-22 02:36:05 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2015-01-22 12:50:56 +0100
commit2f896d5866107e2926dcdec34a7d40bc56dd2951 (patch)
tree45269256d0e928bcc51838ce63f2913abe252480 /arch/arm64/include
parentarm64: respect mem= for EFI (diff)
downloadlinux-2f896d5866107e2926dcdec34a7d40bc56dd2951.tar.xz
linux-2f896d5866107e2926dcdec34a7d40bc56dd2951.zip
arm64: use fixmap for text patching
When kernel text is marked as read only, it cannot be modified directly. Use a fixmap to modify the text instead in a similar manner to x86 and arm. Reviewed-by: Kees Cook <keescook@chromium.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Kees Cook <keescook@chromium.org> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/include')
-rw-r--r--arch/arm64/include/asm/fixmap.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/fixmap.h b/arch/arm64/include/asm/fixmap.h
index 9ef6eca905ca..defa0ff98250 100644
--- a/arch/arm64/include/asm/fixmap.h
+++ b/arch/arm64/include/asm/fixmap.h
@@ -49,6 +49,7 @@ enum fixed_addresses {
FIX_BTMAP_END = __end_of_permanent_fixed_addresses,
FIX_BTMAP_BEGIN = FIX_BTMAP_END + TOTAL_FIX_BTMAPS - 1,
+ FIX_TEXT_POKE0,
__end_of_fixed_addresses
};