From: Joey Gouly <joey.gouly@arm.com> To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, broonie@kernel.org, catalin.marinas@arm.com, dave.hansen@linux.intel.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, shuah@kernel.org, will@kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, James Morse <james.morse@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Zenghui Yu <yuzenghui@huawei.com> Subject: [PATCH v2 03/24] arm64: cpufeature: add Permission Overlay Extension cpucap Date: Fri, 27 Oct 2023 19:08:29 +0100 [thread overview] Message-ID: <20231027180850.1068089-4-joey.gouly@arm.com> (raw) In-Reply-To: <20231027180850.1068089-1-joey.gouly@arm.com> This indicates if the system supports POE. This is a CPUCAP_BOOT_CPU_FEATURE as the boot CPU will enable POE if it has it, so secondary CPUs must also have this feature. Add a new config option: ARM64_POE 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 | 16 ++++++++++++++++ arch/arm64/kernel/cpufeature.c | 9 +++++++++ arch/arm64/tools/cpucaps | 1 + 3 files changed, 26 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b10515c0200b..1f1a12e28c3f 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2060,6 +2060,22 @@ 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 + 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. + +endmenu # "ARMv8.9 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 444a73c2e638..f1c1f348a31d 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2719,6 +2719,15 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64MMFR2_EL1, EVT, IMP) }, +#ifdef CONFIG_ARM64_POE + { + .desc = "Stage-1 Permission Overlay Extension (S1POE)", + .capability = ARM64_HAS_S1POE, + .type = ARM64_CPUCAP_BOOT_CPU_FEATURE, + .matches = has_cpuid_feature, + ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, S1POE, IMP) + }, +#endif {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index c3f06fdef609..b8348e40f6d9 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -43,6 +43,7 @@ HAS_NO_FPSIMD HAS_NO_HW_PREFETCH HAS_PAN HAS_S1PIE +HAS_S1POE HAS_RAS_EXTN HAS_RNG HAS_SB -- 2.25.1
WARNING: multiple messages have this Message-ID (diff)
From: Joey Gouly <joey.gouly@arm.com> To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@linux.ibm.com, broonie@kernel.org, catalin.marinas@arm.com, dave.hansen@linux.intel.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, shuah@kernel.org, will@kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, James Morse <james.morse@arm.com>, Suzuki K Poulose <suzuki.poulose@arm.com>, Zenghui Yu <yuzenghui@huawei.com> Subject: [PATCH v2 03/24] arm64: cpufeature: add Permission Overlay Extension cpucap Date: Fri, 27 Oct 2023 19:08:29 +0100 [thread overview] Message-ID: <20231027180850.1068089-4-joey.gouly@arm.com> (raw) In-Reply-To: <20231027180850.1068089-1-joey.gouly@arm.com> This indicates if the system supports POE. This is a CPUCAP_BOOT_CPU_FEATURE as the boot CPU will enable POE if it has it, so secondary CPUs must also have this feature. Add a new config option: ARM64_POE 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 | 16 ++++++++++++++++ arch/arm64/kernel/cpufeature.c | 9 +++++++++ arch/arm64/tools/cpucaps | 1 + 3 files changed, 26 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index b10515c0200b..1f1a12e28c3f 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -2060,6 +2060,22 @@ 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 + 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. + +endmenu # "ARMv8.9 architectural features" + config ARM64_SVE bool "ARM Scalable Vector Extension support" default y diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 444a73c2e638..f1c1f348a31d 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2719,6 +2719,15 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .matches = has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64MMFR2_EL1, EVT, IMP) }, +#ifdef CONFIG_ARM64_POE + { + .desc = "Stage-1 Permission Overlay Extension (S1POE)", + .capability = ARM64_HAS_S1POE, + .type = ARM64_CPUCAP_BOOT_CPU_FEATURE, + .matches = has_cpuid_feature, + ARM64_CPUID_FIELDS(ID_AA64MMFR3_EL1, S1POE, IMP) + }, +#endif {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index c3f06fdef609..b8348e40f6d9 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -43,6 +43,7 @@ HAS_NO_FPSIMD HAS_NO_HW_PREFETCH HAS_PAN HAS_S1PIE +HAS_S1POE HAS_RAS_EXTN HAS_RNG HAS_SB -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-10-27 18:09 UTC|newest] Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-10-27 18:08 [PATCH v2 00/20] Permission Overlay Extension Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 01/24] arm64/sysreg: add system register POR_EL{0,1} Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 02/24] arm64/sysreg: update CPACR_EL1 register Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` Joey Gouly [this message] 2023-10-27 18:08 ` [PATCH v2 03/24] arm64: cpufeature: add Permission Overlay Extension cpucap Joey Gouly 2023-10-27 18:08 ` [PATCH v2 04/24] arm64: disable trapping of POR_EL0 to EL2 Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 05/24] arm64: context switch POR_EL0 register Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 06/24] KVM: arm64: Save/restore POE registers Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 07/24] arm64: enable the Permission Overlay Extension for EL0 Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 08/24] arm64: add POIndex defines Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 09/24] arm64: define VM_PKEY_BIT* for arm64 Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 10/24] arm64: mask out POIndex when modifying a PTE Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 11/24] arm64: enable ARCH_HAS_PKEYS on arm64 Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 12/24] arm64: handle PKEY/POE faults Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 13/24] arm64: stop using generic mm_hooks.h Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 14/24] arm64: implement PKEYS support Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 15/24] arm64: add POE signal support Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-30 19:10 ` Mark Brown 2023-10-30 19:10 ` Mark Brown 2023-10-27 18:08 ` [PATCH v2 16/24] arm64: enable PKEY support for CPUs with S1POE Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 17/24] arm64: enable POE and PIE to coexist Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 18/24] kselftest/arm64: move get_header() Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 19/24] selftests: mm: move fpregs printing Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 20/24] selftests: mm: make protection_keys test work on arm64 Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 21/24] kselftest/arm64: add HWCAP test for FEAT_S1POE Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-30 19:18 ` Mark Brown 2023-10-30 19:18 ` Mark Brown 2023-10-27 18:08 ` [PATCH v2 22/24] kselftest/arm64: parse POE_MAGIC in a signal frame Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-30 19:19 ` Mark Brown 2023-10-30 19:19 ` Mark Brown 2023-10-27 18:08 ` [PATCH v2 23/24] kselftest/arm64: Add test case for POR_EL0 signal frame records Joey Gouly 2023-10-27 18:08 ` Joey Gouly 2023-10-27 18:08 ` [PATCH v2 24/24] KVM: selftests: get-reg-list: add Permission Overlay registers Joey Gouly 2023-10-27 18:08 ` Joey Gouly
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