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authorRussell King <rmk+kernel@arm.linux.org.uk>2013-10-23 16:13:02 +0100
committerRussell King <rmk+kernel@arm.linux.org.uk>2013-12-11 09:53:13 +0000
commit1fd15b879d0075c8916e52fb9e52522827433d1f (patch)
treea9f950c9dd0eaf9de3c7d359d20bca783564630f /arch/arm/Kconfig.debug
parent6ce4eac1f600b34f2f7f58f9cd8f0503d79e42ae (diff)
ARM: add support to dump the kernel page tables
This patch allows the kernel page tables to be dumped via a debugfs file, allowing kernel developers to check the layout of the kernel page tables and the verify the various permissions and type settings. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig.debug')
-rw-r--r--arch/arm/Kconfig.debug12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/arm/Kconfig.debug b/arch/arm/Kconfig.debug
index 5765abf5ce84..0603a6a53902 100644
--- a/arch/arm/Kconfig.debug
+++ b/arch/arm/Kconfig.debug
@@ -2,6 +2,18 @@ menu "Kernel hacking"
source "lib/Kconfig.debug"
+config ARM_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