On 5/3/24 18:31, Joey Gouly wrote: > 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> > --- > arch/arm64/Kconfig | 22 ++++++++++++++++++++++ > 1 file changed, 22 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 7b11c98b3e84..676ebe4bf9eb 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -2095,6 +2095,28 @@ config ARM64_EPAN > if the cpu does not implement the feature. > endmenu # "ARMv8.7 architectural features" > > +menu "ARMv8.9 architectural features" Agree with Kevin regarding need for an empty line here. > +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
