diff options
Diffstat (limited to 'arch/arm64/Kconfig.debug')
| -rw-r--r-- | arch/arm64/Kconfig.debug | 32 |
1 files changed, 18 insertions, 14 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index d7553f2bda6..1c1b7562984 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -6,22 +6,26 @@ config FRAME_POINTER bool default y -config DEBUG_ERRORS - bool "Verbose kernel error messages" - depends on DEBUG_KERNEL +config STRICT_DEVMEM + bool "Filter access to /dev/mem" + depends on MMU help - This option controls verbose debugging information which can be - printed when the kernel detects an internal error. This debugging - information is useful to kernel hackers when tracking down problems, - but mostly meaningless to other people. It's safe to say Y unless - you are concerned with the code size or don't want to see these - messages. + 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. -config DEBUG_STACK_USAGE - bool "Enable stack utilization instrumentation" - depends on DEBUG_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 PID_IN_CONTEXTIDR + bool "Write the current PID to the CONTEXTIDR register" help - Enables the display of the minimum amount of free stack which each - task has ever had available in the sysrq-T output. + Enabling this option causes the kernel to write the current PID to + the CONTEXTIDR register, at the expense of some additional + instructions during context switch. Say Y here only if you are + planning to use hardware trace tools with this kernel. endmenu |