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| author | Rashmica Gupta <rashmicy@gmail.com> | 2016-05-27 15:48:59 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-11-17 17:11:46 +1100 |
| commit | 8eb07b187000d48152c4ef97f075bdfd82575e8f (patch) | |
| tree | 8611028d0616b147433290c3c70737e8a7c1ba39 /arch/powerpc/Kconfig.debug | |
| parent | 8f272a5dd6826f14e47110eccd37b6782bf74901 (diff) | |
| download | blackbird-obmc-linux-8eb07b187000d48152c4ef97f075bdfd82575e8f.tar.gz blackbird-obmc-linux-8eb07b187000d48152c4ef97f075bdfd82575e8f.zip | |
powerpc/mm: Dump linux pagetables
Useful to be able to dump the kernels page tables to check permissions
and memory types - derived from arm64's implementation.
Add a debugfs file to check the page tables. To use this the PPC_PTDUMP
config option must be selected.
Signed-off-by: Rashmica Gupta <rashmicy@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/Kconfig.debug')
| -rw-r--r-- | arch/powerpc/Kconfig.debug | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug index 63292f64b25a..20cf770611ec 100644 --- a/arch/powerpc/Kconfig.debug +++ b/arch/powerpc/Kconfig.debug @@ -354,4 +354,16 @@ config FAIL_IOMMU If you are unsure, say N. +config PPC_PTDUMP + bool "Export kernel pagetable layout to userspace via debugfs" + depends on DEBUG_KERNEL + select DEBUG_FS + help + This option exports the state of the kernel pagetables to a + debugfs file. This is only useful for kernel developers who are + working in architecture specific areas of the kernel - probably + not a good idea to enable this feature in a production kernel. + + If you are unsure, say N. + endmenu |
