7115125057
It has been enabled by default for some time now and is cheap enough so it doesn't matter anyways. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
41 lines
1.5 KiB
Text
41 lines
1.5 KiB
Text
menu "Kernel hacking"
|
|
|
|
source "lib/Kconfig.debug"
|
|
|
|
config DEBUG_RODATA
|
|
bool "Write protect kernel read-only data structures"
|
|
depends on DEBUG_KERNEL
|
|
help
|
|
Mark the kernel read-only data as write-protected in the pagetables,
|
|
in order to catch accidental (and incorrect) writes to such const data.
|
|
This option may have a slight performance impact because a portion
|
|
of the kernel code won't be covered by a 2MB TLB anymore.
|
|
If in doubt, say "N".
|
|
|
|
config IOMMU_DEBUG
|
|
depends on GART_IOMMU && DEBUG_KERNEL
|
|
bool "Enable IOMMU debugging"
|
|
help
|
|
Force the IOMMU to on even when you have less than 4GB of
|
|
memory and add debugging code. On overflow always panic. And
|
|
allow to enable IOMMU leak tracing. Can be disabled at boot
|
|
time with iommu=noforce. This will also enable scatter gather
|
|
list merging. Currently not recommended for production
|
|
code. When you use it make sure you have a big enough
|
|
IOMMU/AGP aperture. Most of the options enabled by this can
|
|
be set more finegrained using the iommu= command line
|
|
options. See Documentation/x86_64/boot-options.txt for more
|
|
details.
|
|
|
|
config IOMMU_LEAK
|
|
bool "IOMMU leak tracing"
|
|
depends on DEBUG_KERNEL
|
|
depends on IOMMU_DEBUG
|
|
help
|
|
Add a simple leak tracer to the IOMMU code. This is useful when you
|
|
are debugging a buggy device driver that leaks IOMMU mappings.
|
|
|
|
#config X86_REMOTE_DEBUG
|
|
# bool "kgdb debugging stub"
|
|
|
|
endmenu
|