From nobody Thu Oct 9 13:21:57 2025 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 2235628541B for ; Wed, 18 Jun 2025 09:30:09 +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=1750239011; cv=none; b=lDhhlNNwwXKyIxujx4IbEky216A6v4dB+Oi+/GmXYRKT8b+j9YHdb4RZrJ5I+VrQuyPrP4OKQodWpT1tCvmShdIxvjrKEHtiJkhRQZgDsufMKeyHaRoEaOA1jSGfTJphHKdzLrtzgksaSIgwz59ip8jZWOSWtITAOwG8osUqJ8s= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750239011; c=relaxed/simple; bh=qWDgYU9GjYEy2tejugw8ZczCVa9XsBOTxffWoLLYfZk=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=nh+7UBGifNXc/iR/7BqIdnzAYLBVmmcv4NaRAaYoGx1wwtOYA6USjpCogJnzbTqkDHfEtkxD9vkbUPW2Dx6iD5khfTVjbZqKK1huHIhL/tpeTqTLbJRymh+9q6ouD/6xoieDwsoQIrU/nQ9Juf9XvhZrilwTWlRoZHAEINlqzyw= 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 E57441D13; Wed, 18 Jun 2025 02:29:48 -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 3B2513F58B; Wed, 18 Jun 2025 02:30:06 -0700 (PDT) From: Yeoreum Yun To: catalin.marinas@arm.com, pcc@google.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, hardevsinh.palaniya@siliconsignals.io, 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, Yeoreum Yun Subject: [PATCH v7 2/8] prctl: introduce PR_MTE_STORE_ONLY Date: Wed, 18 Jun 2025 10:29:51 +0100 Message-Id: <20250618092957.2069907-3-yeoreum.yun@arm.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20250618092957.2069907-1-yeoreum.yun@arm.com> References: <20250618092957.2069907-1-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 Reviewed-by: Mark Brown --- 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 43dec6eed559..f6fb137c407f 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}