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| author | Laura Abbott <lauraa@codeaurora.org> | 2014-11-26 00:28:39 +0000 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-11-26 17:19:18 +0000 |
| commit | c9465b4ec37a68425c5a574b56280dc1a7e34070 (patch) | |
| tree | 9931393ec1143911c02dc21faf0c62fcc26f4331 /arch/arm64/Kconfig.debug | |
| parent | dab78b6dcb2bfc90038f35ada826844273dde4d6 (diff) | |
| download | lwn-c9465b4ec37a68425c5a574b56280dc1a7e34070.tar.gz lwn-c9465b4ec37a68425c5a574b56280dc1a7e34070.zip | |
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.debug | 12 |
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 |