diff options
Diffstat (limited to 'arch/arm64/Kconfig.debug')
| -rw-r--r-- | arch/arm64/Kconfig.debug | 42 |
1 files changed, 41 insertions, 1 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index 8b0cd45de394..441005f88761 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -73,7 +73,7 @@ config DEBUG_RODATA If in doubt, say Y config DEBUG_ALIGN_RODATA - depends on DEBUG_RODATA && ARM64_4K_PAGES + depends on DEBUG_RODATA bool "Align linker sections up to SECTION_SIZE" help If this option is enabled, sections that may potentially be marked as @@ -85,6 +85,46 @@ config DEBUG_ALIGN_RODATA If in doubt, say N +config FORCE_PAGES + bool "Force lowmem to be mapped with 4K pages" + help + There are some advanced debug features that can only be done when + memory is mapped with pages instead of sections. Enable this option + to always map lowmem pages with pages. This may have a performance + cost due to increased TLB pressure. + + If unsure say N. + +config FREE_PAGES_RDONLY + bool "Set pages as read only while on the buddy list" + select FORCE_PAGES + select DEBUG_PAGEALLOC + help + Pages are always mapped in the kernel. This means that anyone + can write to the page if they have the address. Enable this option + to mark pages as read only to trigger a fault if any code attempts + to write to a page on the buddy list. This may have a performance + impact. + + If unsure, say N. + +config KERNEL_TEXT_RDONLY + bool "Set kernel text section pages as read only" + depends on FREE_PAGES_RDONLY + depends on !DEBUG_RODATA + help + The kernel text pages are always mapped in the kernel. + This means that anyone can write to the page if they have + the address. Enable this option to mark the kernel text pages + as read only to trigger a fault if any code attempts to write + to a page part of the kernel text section. This may have a + performance impact. + + If unsure, say N. + +config ARM64_STRICT_BREAK_BEFORE_MAKE + bool "Enforce strict break-before-make on page table updates " + source "drivers/hwtracing/coresight/Kconfig" endmenu |