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authorLaura Abbott <lauraa@codeaurora.org>2014-11-26 00:28:39 +0000
committerWill Deacon <will.deacon@arm.com>2014-11-26 17:19:18 +0000
commitc9465b4ec37a68425c5a574b56280dc1a7e34070 (patch)
tree9931393ec1143911c02dc21faf0c62fcc26f4331 /arch/arm64/Kconfig.debug
parentarm64: Add FIX_HOLE to permanent fixed addresses (diff)
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arm64: add support to dump the kernel page tables
In a similar manner to arm, it's useful to be able to dump the page tables to verify permissions and memory types. Add a debugfs file to check the page tables. Acked-by: Steve Capper <steve.capper@linaro.org> Tested-by: Steve Capper <steve.capper@linaro.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Laura Abbott <lauraa@codeaurora.org> [will: s/BUFFERABLE/NORMAL-NC/] Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig.debug')
-rw-r--r--arch/arm64/Kconfig.debug12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
index 0a12933e50ed..5fdd6dce8061 100644
--- a/arch/arm64/Kconfig.debug
+++ b/arch/arm64/Kconfig.debug
@@ -6,6 +6,18 @@ config FRAME_POINTER
bool
default y
+config ARM64_PTDUMP
+ bool "Export kernel pagetable layout to userspace via debugfs"
+ depends on DEBUG_KERNEL
+ select DEBUG_FS
+ help
+ Say Y here if you want to show the kernel pagetable layout in a
+ debugfs file. This information is only useful for kernel developers
+ who are working in architecture specific areas of the kernel.
+ It is probably not a good idea to enable this feature in a production
+ kernel.
+ If in doubt, say "N"
+
config STRICT_DEVMEM
bool "Filter access to /dev/mem"
depends on MMU