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-rw-r--r--arch/arm64/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 0b8227f23eed..e8dd55e7db38 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