projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 1da177e4 LT |
1 | menu "Kernel hacking" |
| 2 | ||
| 2601e64d IM |
3 | config TRACE_IRQFLAGS_SUPPORT |
| 4 | bool | |
| 5 | default y | |
| 6 | ||
| 1da177e4 LT |
7 | source "lib/Kconfig.debug" |
| 8 | ||
| 67df197b AV |
9 | config DEBUG_RODATA |
| 10 | bool "Write protect kernel read-only data structures" | |
| 11 | depends on DEBUG_KERNEL | |
| 12 | help | |
| 13 | Mark the kernel read-only data as write-protected in the pagetables, | |
| 14 | in order to catch accidental (and incorrect) writes to such const data. | |
| 15 | This option may have a slight performance impact because a portion | |
| 16 | of the kernel code won't be covered by a 2MB TLB anymore. | |
| 17 | If in doubt, say "N". | |
| 18 | ||
| 1da177e4 | 19 | config IOMMU_DEBUG |
| a813ce43 | 20 | depends on IOMMU && DEBUG_KERNEL |
| 1da177e4 LT |
21 | bool "Enable IOMMU debugging" |
| 22 | help | |
| 23 | Force the IOMMU to on even when you have less than 4GB of | |
| 24 | memory and add debugging code. On overflow always panic. And | |
| 25 | allow to enable IOMMU leak tracing. Can be disabled at boot | |
| 26 | time with iommu=noforce. This will also enable scatter gather | |
| 27 | list merging. Currently not recommended for production | |
| 28 | code. When you use it make sure you have a big enough | |
| 29 | IOMMU/AGP aperture. Most of the options enabled by this can | |
| 30 | be set more finegrained using the iommu= command line | |
| 31 | options. See Documentation/x86_64/boot-options.txt for more | |
| 32 | details. | |
| 33 | ||
| 1da177e4 LT |
34 | config IOMMU_LEAK |
| 35 | bool "IOMMU leak tracing" | |
| 36 | depends on DEBUG_KERNEL | |
| 37 | depends on IOMMU_DEBUG | |
| 38 | help | |
| 39 | Add a simple leak tracer to the IOMMU code. This is useful when you | |
| 40 | are debugging a buggy device driver that leaks IOMMU mappings. | |
| 41 | ||
| 4961f10e ES |
42 | config DEBUG_STACKOVERFLOW |
| 43 | bool "Check for stack overflows" | |
| 44 | depends on DEBUG_KERNEL | |
| 45 | help | |
| 46 | This option will cause messages to be printed if free stack space | |
| 47 | drops below a certain limit. | |
| 48 | ||
| 8501a2fb ES |
49 | config DEBUG_STACK_USAGE |
| 50 | bool "Stack utilization instrumentation" | |
| 51 | depends on DEBUG_KERNEL | |
| 52 | help | |
| 53 | Enables the display of the minimum amount of free stack which each | |
| 54 | task has ever had available in the sysrq-T and sysrq-P debug output. | |
| 55 | ||
| 56 | This option will slow down process creation somewhat. | |
| 57 | ||
| 1da177e4 LT |
58 | #config X86_REMOTE_DEBUG |
| 59 | # bool "kgdb debugging stub" | |
| 60 | ||
| 61 | endmenu |