Now that support for POE and Protection Keys has been implemented, add a config to allow users to actually enable it. Signed-off-by: Joey Gouly <joey.gouly@xxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Reviewed-by: Anshuman Khandual <anshuman.khandual@xxxxxxx> Acked-by: Catalin Marinas <catalin.marinas@xxxxxxx> --- arch/arm64/Kconfig | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git arch/arm64/Kconfig arch/arm64/Kconfig index a2f8ff354ca6..35dfc6275328 100644 --- arch/arm64/Kconfig +++ arch/arm64/Kconfig @@ -2137,6 +2137,29 @@ config ARM64_EPAN if the cpu does not implement the feature. endmenu # "ARMv8.7 architectural features" +menu "ARMv8.9 architectural features" + +config ARM64_POE + prompt "Permission Overlay Extension" + def_bool y + select ARCH_USES_HIGH_VMA_FLAGS + select ARCH_HAS_PKEYS + help + The Permission Overlay Extension is used to implement Memory + Protection Keys. Memory Protection Keys provides a mechanism for + enforcing page-based protections, but without requiring modification + of the page tables when an application changes protection domains. + + For details, see Documentation/core-api/protection-keys.rst + + If unsure, say y. + +config ARCH_PKEY_BITS + int + default 3 + +endmenu # "ARMv8.9 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y -- 2.25.1
