diff options
Diffstat (limited to 'arch/arm64/Kconfig.debug')
| -rw-r--r-- | arch/arm64/Kconfig.debug | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/arch/arm64/Kconfig.debug b/arch/arm64/Kconfig.debug index 835c559786bd..1c1b75629842 100644 --- a/arch/arm64/Kconfig.debug +++ b/arch/arm64/Kconfig.debug @@ -6,14 +6,19 @@ config FRAME_POINTER bool default y -config EARLY_PRINTK - bool "Early printk support" - default y +config STRICT_DEVMEM + bool "Filter access to /dev/mem" + depends on MMU help - Say Y here if you want to have an early console using the - earlyprintk=<name>[,<addr>][,<options>] kernel parameter. It - is assumed that the early console device has been initialised - by the boot loader prior to starting the Linux kernel. + 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. + + 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" |