diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 0b8227f23eed615d6d15a9322c604933fabbf07d..e8dd55e7db3832038ec090d1ca144b84f63141eb 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -794,6 +794,14 @@ config SETEND_EMULATION If unsure, say Y endif +config ARM64_SW_TTBR0_PAN + bool "Emulate Privileged Access Never using TTBR0_EL1 switching" + help + Enabling this option prevents the kernel from accessing + user-space memory directly by pointing TTBR0_EL1 to a reserved + zeroed area and reserved ASID. The user access routines + restore the valid TTBR0_EL1 temporarily. + menu "ARMv8.1 architectural features" config ARM64_HW_AFDBM