Commit d013a27c authored by Randy Dunlap's avatar Randy Dunlap Committed by Sam Ravnborg

x86: unification of i386 and x86_64 Kconfig.debug

Adding proper dependencies so the two Kconfig.debug files
are now identical and move the result file to x86.
Signed-off-by: default avatarRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: default avatarSam Ravnborg <sam@ravnborg.org>
parent 2266cfd5
......@@ -1272,7 +1272,7 @@ source "fs/Kconfig"
source "kernel/Kconfig.instrumentation"
source "arch/i386/Kconfig.debug"
source "arch/x86/Kconfig.debug"
source "security/Kconfig"
......
menu "Kernel hacking"
config TRACE_IRQFLAGS_SUPPORT
bool
default y
def_bool y
source "lib/Kconfig.debug"
config EARLY_PRINTK
bool "Early printk" if EMBEDDED && DEBUG_KERNEL
default y
depends on X86_32
help
Write kernel log output directly into the VGA buffer or to a serial
port.
......@@ -37,10 +37,12 @@ config DEBUG_STACK_USAGE
comment "Page alloc debug is incompatible with Software Suspend on i386"
depends on DEBUG_KERNEL && HIBERNATION
depends on X86_32
config DEBUG_PAGEALLOC
bool "Debug page memory allocations"
depends on DEBUG_KERNEL && !HIBERNATION && !HUGETLBFS
depends on X86_32
help
Unmap pages from the kernel linear mapping after free_pages().
This results in a large slowdown, but helps to find certain types
......@@ -59,6 +61,7 @@ config DEBUG_RODATA
config 4KSTACKS
bool "Use 4Kb for kernel stacks instead of 8Kb"
depends on DEBUG_KERNEL
depends on X86_32
help
If you say Y here the kernel will use a 4Kb stacksize for the
kernel stack attached to each process/thread. This facilitates
......@@ -67,22 +70,50 @@ config 4KSTACKS
will also use IRQ stacks to compensate for the reduced stackspace.
config X86_FIND_SMP_CONFIG
bool
def_bool y
depends on X86_LOCAL_APIC || X86_VOYAGER
default y
depends on X86_32
config X86_MPPARSE
bool
def_bool y
depends on X86_LOCAL_APIC && !X86_VISWS
default y
depends on X86_32
config DOUBLEFAULT
default y
bool "Enable doublefault exception handler" if EMBEDDED
depends on X86_32
help
This option allows trapping of rare doublefault exceptions that
would otherwise cause a system to silently reboot. Disabling this
option saves about 4k and might cause you much additional grey
hair.
config IOMMU_DEBUG
bool "Enable IOMMU debugging"
depends on IOMMU && DEBUG_KERNEL
depends on X86_64
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
......@@ -835,7 +835,7 @@ source fs/Kconfig
source "kernel/Kconfig.instrumentation"
source "arch/x86_64/Kconfig.debug"
source "arch/x86/Kconfig.debug"
source "security/Kconfig"
......
menu "Kernel hacking"
config TRACE_IRQFLAGS_SUPPORT
bool
default y
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 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 DEBUG_STACKOVERFLOW
bool "Check for stack overflows"
depends on DEBUG_KERNEL
help
This option will cause messages to be printed if free stack space
drops below a certain limit.
config DEBUG_STACK_USAGE
bool "Stack utilization instrumentation"
depends on DEBUG_KERNEL
help
Enables the display of the minimum amount of free stack which each
task has ever had available in the sysrq-T and sysrq-P debug output.
This option will slow down process creation somewhat.
#config X86_REMOTE_DEBUG
# bool "kgdb debugging stub"
endmenu
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