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 EARLY_PRINTK
  24         bool "Early printk support"
  25         default y
  26         help
  27           Say Y here if you want to have an early console using the
  28           earlyprintk=<name>[,<addr>][,<options>] kernel parameter. It
  29           is assumed that the early console device has been initialised
  30           by the boot loader prior to starting the Linux kernel.
  31
  32 config PID_IN_CONTEXTIDR
  33         bool "Write the current PID to the CONTEXTIDR register"
  34         help
  35           Enabling this option causes the kernel to write the current PID to
  36           the CONTEXTIDR register, at the expense of some additional
  37           instructions during context switch. Say Y here only if you are
  38           planning to use hardware trace tools with this kernel.
  39
  40 endmenu