diff options
| -rw-r--r-- | arch/arm64/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index a5019f2afa9c..350c05eacb0d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -715,6 +715,14 @@ config SETEND_EMULATION If unsure, say Y endif +config ARM64_SW_TTBR0_PAN + bool "Emulate Priviledged 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 |