From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id C916115381E for ; Fri, 3 May 2024 13:02:48 +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=1714741370; cv=none; b=Z6oqTQHUgiPt7aly7hBSdsCL5/o3vxpNbZ2nHzHSqF0WkFSv1PuozmC2nXWP6GYJhx5GxLmW70TxSviPMxwvpWf/JJLy23q7fkkS5uSjZMh1iaw3hFJ2zXJLOI+TYubUuDXtc52AI1tzTsW98+PiZOm4Zc7+NgBVvhvI6eFO+VI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1714741370; c=relaxed/simple; bh=5Gq4AOxEnwqxawnBzoFTTv6SA6kdFIGsOCIqOX2vtd4=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=pywOrFRO4o1ITJcOS7zUO17z766vqxfL6pMNMVScEV+8W3t7CkF6CeoQJ4/Ke308rGngP+QY5ON7MuWHUNY8rp6p/NaiH4N3A5yqHUzybqp5yVUXu76nv3RZyjXJzsZpX3CjY6T6vI4JQF/eknBXO+n1tFO3I8F31flmQliV0OU= 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 BE51016F3; Fri, 3 May 2024 06:03:13 -0700 (PDT) Received: from e124191.cambridge.arm.com (e124191.cambridge.arm.com [10.1.197.45]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 69B1E3F73F; Fri, 3 May 2024 06:02:45 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, bp@alien8.de, broonie@kernel.org, catalin.marinas@arm.com, christophe.leroy@csgroup.eu, dave.hansen@linux.intel.com, hpa@zytor.com, joey.gouly@arm.com, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, maz@kernel.org, mingo@redhat.com, mpe@ellerman.id.au, naveen.n.rao@linux.ibm.com, npiggin@gmail.com, oliver.upton@linux.dev, shuah@kernel.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev Subject: [PATCH v4 16/29] arm64: add pte_access_permitted_no_overlay() Date: Fri, 3 May 2024 14:01:34 +0100 Message-Id: <20240503130147.1154804-17-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240503130147.1154804-1-joey.gouly@arm.com> References: <20240503130147.1154804-1-joey.gouly@arm.com> Precedence: bulk X-Mailing-List: linux-fsdevel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit We do not want take POE into account when clearing the MTE tags. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/pgtable.h | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 5c970a9cca67..2449e4e27ea6 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -160,8 +160,10 @@ static inline pteval_t __phys_to_pte_val(phys_addr_t phys) * not set) must return false. PROT_NONE mappings do not have the * PTE_VALID bit set. */ -#define pte_access_permitted(pte, write) \ +#define pte_access_permitted_no_overlay(pte, write) \ (((pte_val(pte) & (PTE_VALID | PTE_USER)) == (PTE_VALID | PTE_USER)) && (!(write) || pte_write(pte))) +#define pte_access_permitted(pte, write) \ + pte_access_permitted_no_overlay(pte, write) #define pmd_access_permitted(pmd, write) \ (pte_access_permitted(pmd_pte(pmd), (write))) #define pud_access_permitted(pud, write) \ @@ -348,10 +350,11 @@ static inline void __sync_cache_and_tags(pte_t pte, unsigned int nr_pages) /* * If the PTE would provide user space access to the tags associated * with it then ensure that the MTE tags are synchronised. Although - * pte_access_permitted() returns false for exec only mappings, they - * don't expose tags (instruction fetches don't check tags). + * pte_access_permitted_no_overlay() returns false for exec only + * mappings, they don't expose tags (instruction fetches don't check + * tags). */ - if (system_supports_mte() && pte_access_permitted(pte, false) && + if (system_supports_mte() && pte_access_permitted_no_overlay(pte, false) && !pte_special(pte) && pte_tagged(pte)) mte_sync_tags(pte, nr_pages); } -- 2.25.1