| Message ID | 20240503130147.1154804-23-joey.gouly@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64: Permission Overlay Extension | expand |
On Fri, May 03, 2024 at 02:01:40PM +0100, 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@arm.com> > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
On 03/05/2024 15:01, 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@arm.com> > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> > --- > 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" Nit: empty line here to be consistent with other menu entries. Kevin > +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
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@arm.com> > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> Reviewed-by: Anshuman Khandual <anshuman.khandual@arm.com> > --- > 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
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" +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
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@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> --- arch/arm64/Kconfig | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)