3 source "lib/Kconfig.debug"
10 bool "Filter access to /dev/mem"
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.
18 If this option is switched on, the /dev/mem file only allows
19 userspace access to memory mapped peripherals.
23 config PID_IN_CONTEXTIDR
24 bool "Write the current PID to the CONTEXTIDR register"
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.