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authorArjan van de Ven <arjan@infradead.org>2006-01-06 00:12:04 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-06 08:33:36 -0800
commit67df197b1a07944c2e0e40ded3d4fd07d108e110 (patch)
treeb29534a27b2c18e64c6b3d4cdc149de8978e38ba /arch/x86_64/Kconfig.debug
parentc728252c7a072628bd3932ff87943d1e12423359 (diff)
[PATCH] x86/x86_64: mark rodata section read-only: x86-64 support
x86-64 specific parts to make the .rodata section read only Signed-off-by: Arjan van de Ven <arjan@infradead.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/x86_64/Kconfig.debug')
-rw-r--r--arch/x86_64/Kconfig.debug10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86_64/Kconfig.debug b/arch/x86_64/Kconfig.debug
index e2c6e64a85ec..fcb06a50fdd2 100644
--- a/arch/x86_64/Kconfig.debug
+++ b/arch/x86_64/Kconfig.debug
@@ -9,6 +9,16 @@ config INIT_DEBUG
Fill __init and __initdata at the end of boot. This helps debugging
illegal uses of __init and __initdata after initialization.
+config DEBUG_RODATA
+ bool "Write protect kernel read-only data structures"
+ depends on DEBUG_KERNEL
+ help
+ Mark the kernel read-only data as write-protected in the pagetables,
+ in order to catch accidental (and incorrect) writes to such const data.
+ This option may have a slight performance impact because a portion
+ of the kernel code won't be covered by a 2MB TLB anymore.
+ If in doubt, say "N".
+
config IOMMU_DEBUG
depends on GART_IOMMU && DEBUG_KERNEL
bool "Enable IOMMU debugging"