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Thu, 9 Mar 2023 14:52:53 +0000 From: Joey Gouly To: CC: , , , , , , , , , , Subject: [PATCH v1 08/18] arm64: cpufeature: add Permission Indirection Extension cpucap Date: Thu, 9 Mar 2023 14:52:36 +0000 Message-ID: <20230309145246.22787-9-joey.gouly@arm.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20230309145246.22787-1-joey.gouly@arm.com> References: <20230309145246.22787-1-joey.gouly@arm.com> MIME-Version: 1.0 X-EOPAttributedMessage: 1 X-MS-TrafficTypeDiagnostic: VI1EUR03FT059:EE_|GV2PR08MB8320:EE_|VI1EUR03FT064:EE_|AS8PR08MB6533:EE_ X-MS-Office365-Filtering-Correlation-Id: 03ba7c7d-fd5c-4812-57dc-08db20ae0392 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0; X-Microsoft-Antispam-Message-Info-Original: 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 X-Forefront-Antispam-Report-Untrusted: CIP:40.67.248.234;CTRY:IE;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:nebula.arm.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(346002)(136003)(396003)(39860400002)(376002)(451199018)(46966006)(36840700001)(70206006)(8676002)(70586007)(47076005)(186003)(82310400005)(426003)(54906003)(40480700001)(86362001)(36860700001)(356005)(2616005)(26005)(82740400003)(36756003)(1076003)(336012)(81166007)(316002)(6916009)(7696005)(2906002)(8936002)(44832011)(478600001)(6666004)(5660300002)(4326008)(41300700001)(36900700001);DIR:OUT;SFP:1101; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org This indicates if the system supports PIE. This is a CPUCAP_BOOT_CPU_FEATURE as the boot CPU will enable PIE if it has it, so secondary CPUs must also have this feature. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon Reviewed-by: Catalin Marinas --- arch/arm64/kernel/cpufeature.c | 11 +++++++++++ arch/arm64/tools/cpucaps | 1 + 2 files changed, 12 insertions(+) diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 6944d8bbb17c..acbc21963128 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -2793,6 +2793,17 @@ static const struct arm64_cpu_capabilities arm64_features[] = { .min_field_value = ID_AA64MMFR3_EL1_TCRX_IMP, .matches = has_cpuid_feature, }, + { + .desc = "Permission Indirection Extension (PIE)", + .capability = ARM64_HAS_PIE, + .type = ARM64_CPUCAP_BOOT_CPU_FEATURE, + .sys_reg = SYS_ID_AA64MMFR3_EL1, + .sign = FTR_UNSIGNED, + .field_pos = ID_AA64MMFR3_EL1_S1PIE_SHIFT, + .field_width = 4, + .min_field_value = ID_AA64MMFR3_EL1_S1PIE_IMP, + .matches = has_cpuid_feature, + }, {}, }; diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index 5859b9ee7444..c4c4c59882b8 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -37,6 +37,7 @@ HAS_NESTED_VIRT HAS_NO_FPSIMD HAS_NO_HW_PREFETCH HAS_PAN +HAS_PIE HAS_RAS_EXTN HAS_RNG HAS_SB