From nobody Sat Feb 7 09:34:58 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CBEA42528F8 for ; Thu, 3 Apr 2025 17:47:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702434; cv=none; b=CA7ZIJERY2oRpk6ry6ycGQhRfobDE97x+6WOyhnXgCkWZ7plwa4Srgalq/TMdeHf0e06ARMgPwx01KK/3VkJLFEU7f2D2Hbo28w4iuBYBB9cRVdHkRtOWIuL+9q8gUrSy+ZRHcltQTZPr2PQMNoJaGT3wq4uio56R8XaRyB6AZA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702434; c=relaxed/simple; bh=6J4ZeJjeWmgaza/vMJpLVHpRPHYTorbgfXi6umjFUzI=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=UKpau7jyNwWqsv4Nhh5TsRAPQ1MLLQ+YTiFeAUiS+jXh5An8wdfhamkV/paHTAeyTSsSaey3nHY1uIG9fat3AP+mceyrW27onmWYUvtYRC1bqglZLyP3KfzzDxRPxq/fR/Vcg6ipdY8xBYNAYAIpstYEO7Dvjyf3QEqAL65V5pE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9704815A1; Thu, 3 Apr 2025 10:47:14 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 475143F63F; Thu, 3 Apr 2025 10:47:08 -0700 (PDT) From: Yeoreum Yun To: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, anshuman.khandual@arm.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, frederic@kernel.org, james.morse@arm.com, hardevsinh.palaniya@siliconsignals.io, shameerali.kolothum.thodi@huawei.com, huangxiaojia2@huawei.com, mark.rutland@arm.com, samuel.holland@sifive.com, palmer@rivosinc.com, charlie@rivosinc.com, thiago.bauermann@linaro.org, bgray@linux.ibm.com, tglx@linutronix.de, puranjay@kernel.org, david@redhat.com, yang@os.amperecomputing.com, mbenes@suse.cz, joel.granados@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, nd@arm.com, Yeoreum Yun Subject: [PATCH v2 1/4] arm64/feature: add MTE_STORE_ONLY feature Date: Thu, 3 Apr 2025 18:46:58 +0100 Message-Id: <20250403174701.74312-2-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250403174701.74312-1-yeoreum.yun@arm.com> References: <20250403174701.74312-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" add MTE_STORE_ONLY feature and HWCAP. Signed-off-by: Yeoreum Yun --- Documentation/arch/arm64/elf_hwcaps.rst | 3 +++ arch/arm64/include/asm/hwcap.h | 1 + arch/arm64/include/uapi/asm/hwcap.h | 1 + arch/arm64/kernel/cpufeature.c | 9 +++++++++ arch/arm64/kernel/cpuinfo.c | 1 + arch/arm64/tools/cpucaps | 1 + 6 files changed, 16 insertions(+) diff --git a/Documentation/arch/arm64/elf_hwcaps.rst b/Documentation/arch/a= rm64/elf_hwcaps.rst index 358f5af035ff..f58ada4d6cb2 100644 --- a/Documentation/arch/arm64/elf_hwcaps.rst +++ b/Documentation/arch/arm64/elf_hwcaps.rst @@ -438,6 +438,9 @@ HWCAP2_POE HWCAP3_MTE_FAR Functionality implied by ID_AA64PFR2_EL1.MTEFAR =3D=3D 0b0001. =20 +HWCAP3_MTE_STORE_ONLY + Functionality implied by ID_AA64PFR2_EL1.MTESTOREONLY =3D=3D 0b0001. + 4. Unused AT_HWCAP bits ----------------------- =20 diff --git a/arch/arm64/include/asm/hwcap.h b/arch/arm64/include/asm/hwcap.h index 28dd1ac29ecc..13f94c8ddfc0 100644 --- a/arch/arm64/include/asm/hwcap.h +++ b/arch/arm64/include/asm/hwcap.h @@ -177,6 +177,7 @@ =20 #define __khwcap3_feature(x) (const_ilog2(HWCAP3_ ## x) + 128) #define KERNEL_HWCAP_MTE_FAR __khwcap3_feature(MTE_FAR) +#define KERNEL_HWCAP_MTE_STORE_ONLY __khwcap3_feature(MTE_STORE_ONLY) =20 /* * This yields a mask that user programs can use to figure out what diff --git a/arch/arm64/include/uapi/asm/hwcap.h b/arch/arm64/include/uapi/= asm/hwcap.h index 7d22527a7975..72c78468b806 100644 --- a/arch/arm64/include/uapi/asm/hwcap.h +++ b/arch/arm64/include/uapi/asm/hwcap.h @@ -144,5 +144,6 @@ * HWCAP3 flags - for AT_HWCAP3 */ #define HWCAP3_MTE_FAR (1UL << 0) +#define HWCAP3_MTE_STORE_ONLY (1UL << 1) =20 #endif /* _UAPI__ASM_HWCAP_H */ diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 183b4b7e3074..a2f25a8bed96 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -313,6 +313,7 @@ static const struct arm64_ftr_bits ftr_id_aa64pfr1[] = =3D { static const struct arm64_ftr_bits ftr_id_aa64pfr2[] =3D { ARM64_FTR_BITS(FTR_VISIBLE, FTR_STRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL1_F= PMR_SHIFT, 4, 0), ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL= 1_MTEFAR_SHIFT, 4, ID_AA64PFR2_EL1_MTEFAR_NI), + ARM64_FTR_BITS(FTR_VISIBLE, FTR_NONSTRICT, FTR_LOWER_SAFE, ID_AA64PFR2_EL= 1_MTESTOREONLY_SHIFT, 4, ID_AA64PFR2_EL1_MTESTOREONLY_NI), ARM64_FTR_END, }; =20 @@ -2869,6 +2870,13 @@ static const struct arm64_cpu_capabilities arm64_fea= tures[] =3D { .matches =3D has_cpuid_feature, ARM64_CPUID_FIELDS(ID_AA64PFR2_EL1, MTEFAR, IMP) }, + { + .desc =3D "Store Only MTE Tag Check", + .capability =3D ARM64_MTE_STORE_ONLY, + .type =3D ARM64_CPUCAP_SYSTEM_FEATURE, + .matches =3D has_cpuid_feature, + ARM64_CPUID_FIELDS(ID_AA64PFR2_EL1, MTESTOREONLY, IMP) + }, #endif /* CONFIG_ARM64_MTE */ { .desc =3D "RCpc load-acquire (LDAPR)", @@ -3200,6 +3208,7 @@ static const struct arm64_cpu_capabilities arm64_elf_= hwcaps[] =3D { HWCAP_CAP(ID_AA64PFR1_EL1, MTE, MTE2, CAP_HWCAP, KERNEL_HWCAP_MTE), HWCAP_CAP(ID_AA64PFR1_EL1, MTE, MTE3, CAP_HWCAP, KERNEL_HWCAP_MTE3), HWCAP_CAP(ID_AA64PFR2_EL1, MTEFAR, IMP, CAP_HWCAP, KERNEL_HWCAP_MTE_FAR), + HWCAP_CAP(ID_AA64PFR2_EL1, MTESTOREONLY, IMP, CAP_HWCAP , KERNEL_HWCAP_MT= E_STORE_ONLY), #endif /* CONFIG_ARM64_MTE */ HWCAP_CAP(ID_AA64MMFR0_EL1, ECV, IMP, CAP_HWCAP, KERNEL_HWCAP_ECV), HWCAP_CAP(ID_AA64MMFR1_EL1, AFP, IMP, CAP_HWCAP, KERNEL_HWCAP_AFP), diff --git a/arch/arm64/kernel/cpuinfo.c b/arch/arm64/kernel/cpuinfo.c index e2b13454e38a..40f85ec01fe4 100644 --- a/arch/arm64/kernel/cpuinfo.c +++ b/arch/arm64/kernel/cpuinfo.c @@ -161,6 +161,7 @@ static const char *const hwcap_str[] =3D { [KERNEL_HWCAP_SME_STMOP] =3D "smestmop", [KERNEL_HWCAP_SME_SMOP4] =3D "smesmop4", [KERNEL_HWCAP_MTE_FAR] =3D "mte_far", + [KERNEL_HWCAP_MTE_STORE_ONLY] =3D "mte_store_only", }; =20 #ifdef CONFIG_COMPAT diff --git a/arch/arm64/tools/cpucaps b/arch/arm64/tools/cpucaps index ef62ea04ba37..282a1dbb8bc9 100644 --- a/arch/arm64/tools/cpucaps +++ b/arch/arm64/tools/cpucaps @@ -68,6 +68,7 @@ MPAM_HCR MTE MTE_ASYMM MTE_FAR +MTE_STORE_ONLY SME SME_FA64 SME2 --=20 LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7} From nobody Sat Feb 7 09:34:58 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id F080B2528F8 for ; Thu, 3 Apr 2025 17:47:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702438; cv=none; b=M1rPRBs03nTkbRCBgNC4idA+LcQdXpGNo0KbpCoDhtyPazX2HBXdZRSEPE/OlTI64ljZfIQOl3GmDkjWqifck0Jo+xjS3JBtK15LQ9MkLPa/r8OJ1fnIvhlHpyzy/GvmTn6Wha3cl1LyQgRWCdbQwjoo3GKM7k13phUhfFt4ODQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702438; c=relaxed/simple; bh=369bwvtiVylIIOkV/f/3osAZWZV4pzU5X5ry2ZDYtJs=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=HIHqBnVW6OkXlZUVmdaoWk1wh7/WEdBFV2NQ7ynKvCQQKF632AW6Oj66RjQGYg6/KBRflWn/yCIdSOcFsOeE/oRsHLNTm8waU4Y3G97LRHxRs2YKxYSz0z8Th+PSWxVl5sfrZUskTv3CeI3Rn7iO3YH8krIx3xvNjnszwplFblk= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id B018D1C01; Thu, 3 Apr 2025 10:47:18 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 579963F63F; Thu, 3 Apr 2025 10:47:12 -0700 (PDT) From: Yeoreum Yun To: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, anshuman.khandual@arm.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, frederic@kernel.org, james.morse@arm.com, hardevsinh.palaniya@siliconsignals.io, shameerali.kolothum.thodi@huawei.com, huangxiaojia2@huawei.com, mark.rutland@arm.com, samuel.holland@sifive.com, palmer@rivosinc.com, charlie@rivosinc.com, thiago.bauermann@linaro.org, bgray@linux.ibm.com, tglx@linutronix.de, puranjay@kernel.org, david@redhat.com, yang@os.amperecomputing.com, mbenes@suse.cz, joel.granados@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, nd@arm.com, Yeoreum Yun Subject: [PATCH v2 2/4] prtcl: introduce PR_MTE_STORE_ONLY Date: Thu, 3 Apr 2025 18:46:59 +0100 Message-Id: <20250403174701.74312-3-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250403174701.74312-1-yeoreum.yun@arm.com> References: <20250403174701.74312-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" PR_MTE_STORE_ONLY is used to restrict the MTE tag check for store opeartion only. Signed-off-by: Yeoreum Yun --- include/uapi/linux/prctl.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/uapi/linux/prctl.h b/include/uapi/linux/prctl.h index 15c18ef4eb11..83ac566251d8 100644 --- a/include/uapi/linux/prctl.h +++ b/include/uapi/linux/prctl.h @@ -244,6 +244,8 @@ struct prctl_mm_map { # define PR_MTE_TAG_MASK (0xffffUL << PR_MTE_TAG_SHIFT) /* Unused; kept only for source compatibility */ # define PR_MTE_TCF_SHIFT 1 +/* MTE tag check store only */ +# define PR_MTE_STORE_ONLY (1UL << 19) /* RISC-V pointer masking tag length */ # define PR_PMLEN_SHIFT 24 # define PR_PMLEN_MASK (0x7fUL << PR_PMLEN_SHIFT) --=20 LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7} From nobody Sat Feb 7 09:34:58 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EBD39253B71 for ; Thu, 3 Apr 2025 17:47:20 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702442; cv=none; b=o4+dtqNddw5zHz61FTR3f6nPW061SBJjPiu9ocK0ZDueDsmUfm/076EojA7Mmxp06iJaFvGfb3JD66WscVPLrZBvzS5QzB8KxZ9XDT2+yim22kfy3sAX2bHdDkC1veJjhy00W8dCppnL6YQsGx0kJ/79V2DQfT5keM4fcxLKcas= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702442; c=relaxed/simple; bh=afGq6vaBuCHVV4TwQlk/pOOSz5YsAKgn4eZzYrQlYYo=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=g46GcLV0CZGNvQ0+DRtjx0J0/vrykR890BI4u+8H9RJgc0IGK84ugZJtn1qPvOCvkteDQeQqRxRY1PimvWrC9T8Hdol0z4bQowDHTkFqZBV3VrOR+wEaqMjs3GT+dvW9NyW2LyS0MEOUMFGBuCoyV88I2j4YnziqkLwas65Yb0E= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id C0CB815A1; Thu, 3 Apr 2025 10:47:22 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 710F53F63F; Thu, 3 Apr 2025 10:47:16 -0700 (PDT) From: Yeoreum Yun To: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, anshuman.khandual@arm.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, frederic@kernel.org, james.morse@arm.com, hardevsinh.palaniya@siliconsignals.io, shameerali.kolothum.thodi@huawei.com, huangxiaojia2@huawei.com, mark.rutland@arm.com, samuel.holland@sifive.com, palmer@rivosinc.com, charlie@rivosinc.com, thiago.bauermann@linaro.org, bgray@linux.ibm.com, tglx@linutronix.de, puranjay@kernel.org, david@redhat.com, yang@os.amperecomputing.com, mbenes@suse.cz, joel.granados@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, nd@arm.com, Yeoreum Yun Subject: [PATCH v2 3/4] arm64/kernel: support store-only mte tag check Date: Thu, 3 Apr 2025 18:47:00 +0100 Message-Id: <20250403174701.74312-4-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250403174701.74312-1-yeoreum.yun@arm.com> References: <20250403174701.74312-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Introduce new flag -- MTE_CTRL_STORE_ONLY used to set store-only tag check. This flag isn't overrided by prefered tcf flag setting but set together with prefered setting of way to report tag check fault. Signed-off-by: Yeoreum Yun --- arch/arm64/include/asm/processor.h | 2 ++ arch/arm64/kernel/mte.c | 11 ++++++++++- arch/arm64/kernel/process.c | 6 +++++- 3 files changed, 17 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/processor.h b/arch/arm64/include/asm/pr= ocessor.h index 1bf1a3b16e88..61d62bfd5a7b 100644 --- a/arch/arm64/include/asm/processor.h +++ b/arch/arm64/include/asm/processor.h @@ -23,6 +23,8 @@ #define MTE_CTRL_TCF_ASYNC (1UL << 17) #define MTE_CTRL_TCF_ASYMM (1UL << 18) =20 +#define MTE_CTRL_STORE_ONLY (1UL << 19) + #ifndef __ASSEMBLY__ =20 #include diff --git a/arch/arm64/kernel/mte.c b/arch/arm64/kernel/mte.c index 2fbfd27ff5f2..e5e773844889 100644 --- a/arch/arm64/kernel/mte.c +++ b/arch/arm64/kernel/mte.c @@ -200,7 +200,7 @@ static void mte_update_sctlr_user(struct task_struct *t= ask) * program requested values go with what was requested. */ resolved_mte_tcf =3D (mte_ctrl & pref) ? pref : mte_ctrl; - sctlr &=3D ~SCTLR_EL1_TCF0_MASK; + sctlr &=3D ~(SCTLR_EL1_TCF0_MASK | SCTLR_EL1_TCSO0_MASK); /* * Pick an actual setting. The order in which we check for * set bits and map into register values determines our @@ -212,6 +212,10 @@ static void mte_update_sctlr_user(struct task_struct *= task) sctlr |=3D SYS_FIELD_PREP_ENUM(SCTLR_EL1, TCF0, ASYNC); else if (resolved_mte_tcf & MTE_CTRL_TCF_SYNC) sctlr |=3D SYS_FIELD_PREP_ENUM(SCTLR_EL1, TCF0, SYNC); + + if (mte_ctrl & MTE_CTRL_STORE_ONLY) + sctlr |=3D SYS_FIELD_PREP(SCTLR_EL1, TCSO0, 1); + task->thread.sctlr_user =3D sctlr; } =20 @@ -371,6 +375,9 @@ long set_mte_ctrl(struct task_struct *task, unsigned lo= ng arg) (arg & PR_MTE_TCF_SYNC)) mte_ctrl |=3D MTE_CTRL_TCF_ASYMM; =20 + if (arg & PR_MTE_STORE_ONLY) + mte_ctrl |=3D MTE_CTRL_STORE_ONLY; + task->thread.mte_ctrl =3D mte_ctrl; if (task =3D=3D current) { preempt_disable(); @@ -398,6 +405,8 @@ long get_mte_ctrl(struct task_struct *task) ret |=3D PR_MTE_TCF_ASYNC; if (mte_ctrl & MTE_CTRL_TCF_SYNC) ret |=3D PR_MTE_TCF_SYNC; + if (mte_ctrl & MTE_CTRL_STORE_ONLY) + ret |=3D PR_MTE_STORE_ONLY; =20 return ret; } diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 42faebb7b712..cea4a23a15de 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -815,10 +815,14 @@ long set_tagged_addr_ctrl(struct task_struct *task, u= nsigned long arg) if (is_compat_thread(ti)) return -EINVAL; =20 - if (system_supports_mte()) + if (system_supports_mte()) { valid_mask |=3D PR_MTE_TCF_SYNC | PR_MTE_TCF_ASYNC \ | PR_MTE_TAG_MASK; =20 + if (cpus_have_cap(ARM64_MTE_STORE_ONLY)) + valid_mask |=3D PR_MTE_STORE_ONLY; + } + if (arg & ~valid_mask) return -EINVAL; =20 --=20 LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7} From nobody Sat Feb 7 09:34:58 2026 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id F213F252906 for ; Thu, 3 Apr 2025 17:47:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702446; cv=none; b=SK61I99gVu/XMBSbdk+hoTBbU/lprsHi1p693wn2NusUCSUwV//a/jVJdztc44wuGigfWiTHE/8n9WeGUK8lPrTA871R1uLJmfj8sYd0RXlqgHUO/iU4zKsB7V2HZ3NXemlrgXTuca29z7A/FFRyj+DAKZtPU2O+0jUS525cvkA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743702446; c=relaxed/simple; bh=L0zaOj5o13xR5jbFWehlI7DGmTMxzyZwV/9ij8UcDas=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=rlgBr7xWdA8jD5BpxaJgdkejTP1Etw8f7V+3MHyGCWx2BCO6TIcJ1SVZ3DhWaBXwwFsw7/Ada3A0EKDX9DL4MIX4VH3s0zlGGINrKD+eWctoVyZkFunBWmjhW0Q2J+bri8AWV79qG+3t1DtJ51M6JUiAO9KSAtbpE6XDgs7g/bQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id D923F15A1; Thu, 3 Apr 2025 10:47:26 -0700 (PDT) Received: from e129823.cambridge.arm.com (e129823.arm.com [10.1.197.6]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 813793F63F; Thu, 3 Apr 2025 10:47:20 -0700 (PDT) From: Yeoreum Yun To: catalin.marinas@arm.com, will@kernel.org, broonie@kernel.org, anshuman.khandual@arm.com, joey.gouly@arm.com, maz@kernel.org, oliver.upton@linux.dev, frederic@kernel.org, james.morse@arm.com, hardevsinh.palaniya@siliconsignals.io, shameerali.kolothum.thodi@huawei.com, huangxiaojia2@huawei.com, mark.rutland@arm.com, samuel.holland@sifive.com, palmer@rivosinc.com, charlie@rivosinc.com, thiago.bauermann@linaro.org, bgray@linux.ibm.com, tglx@linutronix.de, puranjay@kernel.org, david@redhat.com, yang@os.amperecomputing.com, mbenes@suse.cz, joel.granados@kernel.org Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, nd@arm.com, Yeoreum Yun Subject: [PATCH v2 4/4] tools/kselftest: add MTE_STORE_ONLY feature hwcap test Date: Thu, 3 Apr 2025 18:47:01 +0100 Message-Id: <20250403174701.74312-5-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250403174701.74312-1-yeoreum.yun@arm.com> References: <20250403174701.74312-1-yeoreum.yun@arm.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" add MTE_STORE_ONLY feature hwcap test. Signed-off-by: Yeoreum Yun Reviewed-by: Mark Brown --- tools/testing/selftests/arm64/abi/hwcap.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/tools/testing/selftests/arm64/abi/hwcap.c b/tools/testing/self= tests/arm64/abi/hwcap.c index a539eeb0bfc0..32385f67498e 100644 --- a/tools/testing/selftests/arm64/abi/hwcap.c +++ b/tools/testing/selftests/arm64/abi/hwcap.c @@ -1104,6 +1104,12 @@ static const struct hwcap_data { .hwcap_bit =3D HWCAP3_MTE_FAR, .cpuinfo =3D "mte_far", }, + { + .name =3D "MTE_STOREONLY", + .at_hwcap =3D AT_HWCAP3, + .hwcap_bit =3D HWCAP3_MTE_STORE_ONLY, + .cpuinfo =3D "mte_store_only", + }, }; =20 typedef void (*sighandler_fn)(int, siginfo_t *, void *); --=20 LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}