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.go...@arm.com>
Cc: Catalin Marinas <catalin.mari...@arm.com>
Cc: Will Deacon <w...@kernel.org>
Reviewed-by: Anshuman Khandual <anshuman.khand...@arm.com>
Acked-by: Catalin Marinas <catalin.mari...@arm.com>
---
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
