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authorLaura Abbott <lauraa@codeaurora.org>2014-04-05 01:30:50 +0100
committerCatalin Marinas <catalin.marinas@arm.com>2014-04-07 17:33:13 +0100
commitd253b4406df69fa7a74231769d6f6ad80dc33063 (patch)
treed98ed01d699d74d317c232e924a2839bc0efc5e9 /arch/arm64/Kconfig.debug
parentarm64: fix !CONFIG_COMPAT build failures (diff)
downloadlinux-dev-d253b4406df69fa7a74231769d6f6ad80dc33063.tar.xz
linux-dev-d253b4406df69fa7a74231769d6f6ad80dc33063.zip
arm64: Add missing Kconfig for CONFIG_STRICT_DEVMEM
The Kconfig for CONFIG_STRICT_DEVMEM is missing despite being used in mmap.c. Add it. Signed-off-by: Laura Abbott <lauraa@codeaurora.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig.debug')
-rw-r--r--arch/arm64/Kconfig.debug14
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug
index 835c559786bd..d10ec334c93b 100644
--- a/arch/arm64/Kconfig.debug
+++ b/arch/arm64/Kconfig.debug
@@ -6,6 +6,20 @@ config FRAME_POINTER
bool
default y
+config STRICT_DEVMEM
+ bool "Filter access to /dev/mem"
+ depends on MMU
+ help
+ If this option is disabled, you allow userspace (root) access to all
+ of memory, including kernel and userspace memory. Accidental
+ access to this is obviously disastrous, but specific access can
+ be used by people debugging the kernel.
+
+ If this option is switched on, the /dev/mem file only allows
+ userspace access to memory mapped peripherals.
+
+ If in doubt, say Y.
+
config EARLY_PRINTK
bool "Early printk support"
default y