arch/arm64/Kconfig.debug

   1 menu "Kernel hacking"
   2
   3 source "lib/Kconfig.debug"
   4
   5 config FRAME_POINTER
   6         bool
   7         default y
   8
   9 config STRICT_DEVMEM
  10         bool "Filter access to /dev/mem"
  11         depends on MMU
  12         help
  13           If this option is disabled, you allow userspace (root) access to all
  14           of memory, including kernel and userspace memory. Accidental
  15           access to this is obviously disastrous, but specific access can
  16           be used by people debugging the kernel.
  17
  18           If this option is switched on, the /dev/mem file only allows
  19           userspace access to memory mapped peripherals.
  20
  21           If in doubt, say Y.
  22
  23 config PID_IN_CONTEXTIDR
  24         bool "Write the current PID to the CONTEXTIDR register"
  25         help
  26           Enabling this option causes the kernel to write the current PID to
  27           the CONTEXTIDR register, at the expense of some additional
  28           instructions during context switch. Say Y here only if you are
  29           planning to use hardware trace tools with this kernel.
  30
  31 endmenu