From patchwork Thu Aug 22 15:10:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Joey Gouly X-Patchwork-Id: 13773849 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 29FA3C3DA4A for ; Thu, 22 Aug 2024 15:52:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=XWloCsKInlghkQxh/mo59nFfEBaFhJ6JRXZEr40jxF0=; b=iMILeQN+M2jm3wy5GgtxQLZK7l FKSIVz3IH0a/n0r6j4PTOBjkvaAd+lCcbBiAeiHXp1CXZ63loRLAVNdG6lWGT8LKfZzOMbgiLerMW XvaCV5lzZdi/x8J67I8NEDIS7fDrgVcVLYbwrlBED0+g17KmMgSWoJFaf1khfDMqAWZIx8z7Td8gP kJa8VzWeGbjyoDDBq8iXbdviIRc8l6Y6ip9yPK3NIUptbEM3+aZGW0QH+4a4l+uVO/1HyLAlrV8Cf 8zZmezaM2drtSvY2vgMbUAngwOTN+mjylKJlbwv7SFfe+6/bqgVwWaI195JMprvfyi8mI/39Ci5WW afwrhNxQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1shA6r-0000000DPXG-1WWW; Thu, 22 Aug 2024 15:52:25 +0000 Received: from desiato.infradead.org ([2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sh9UH-0000000DIPB-1NIX for linux-arm-kernel@bombadil.infradead.org; Thu, 22 Aug 2024 15:12:33 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=Content-Transfer-Encoding:MIME-Version :References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=XWloCsKInlghkQxh/mo59nFfEBaFhJ6JRXZEr40jxF0=; b=EjJ/UnN2DcRhpt8/GXtETOk4zo C1YMUVl2HRtHi9sGnimwqqrLO+Qsrp7Ch1o7xWRvGMmNBg06LG6h2HOwZmx2P4RssQfUgPEjt4BhM qE3uXfLX5Sy4cmEZ1K0yRAyeyiE/eJIpQU01fCHqJ/FSZCNTWJ+lnMGYbd8ymu71YQgk1LM/xcAxv PxZdSLz4MiSkXhzuBuypQP07+I8A/DeHmLGXuOBVY2A7SDdUfKbCuZuh9C8ZpRmO1/KUiZLYOKi2C gvtr3fZV0pS76Nb6cpMO27bdU8wkSUIuncpUll5EnR3UWjl14c7/YlqDhoKoBpCoKqEu6FL35C/Gx yKiLhkoQ==; Received: from foss.arm.com ([217.140.110.172]) by desiato.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sh9UD-00000009yBa-26Le for linux-arm-kernel@lists.infradead.org; Thu, 22 Aug 2024 15:12:31 +0000 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 2BF8D165C; Thu, 22 Aug 2024 08:12:55 -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 0D3BE3F58B; Thu, 22 Aug 2024 08:12:24 -0700 (PDT) From: Joey Gouly To: linux-arm-kernel@lists.infradead.org Cc: nd@arm.com, akpm@linux-foundation.org, aneesh.kumar@kernel.org, aneesh.kumar@linux.ibm.com, anshuman.khandual@arm.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, skhan@linuxfoundation.org, szabolcs.nagy@arm.com, tglx@linutronix.de, will@kernel.org, x86@kernel.org, kvmarm@lists.linux.dev, linux-kselftest@vger.kernel.org Subject: [PATCH v5 15/30] arm64: mask out POIndex when modifying a PTE Date: Thu, 22 Aug 2024 16:10:58 +0100 Message-Id: <20240822151113.1479789-16-joey.gouly@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240822151113.1479789-1-joey.gouly@arm.com> References: <20240822151113.1479789-1-joey.gouly@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240822_161229_884775_B042AD97 X-CRM114-Status: GOOD ( 10.06 ) 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 When a PTE is modified, the POIndex must be masked off so that it can be modified. Signed-off-by: Joey Gouly Cc: Catalin Marinas Cc: Will Deacon Reviewed-by: Catalin Marinas Reviewed-by: Anshuman Khandual --- arch/arm64/include/asm/pgtable.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git arch/arm64/include/asm/pgtable.h arch/arm64/include/asm/pgtable.h index 7a4f5604be3f..1d0f18d30e1e 100644 --- arch/arm64/include/asm/pgtable.h +++ arch/arm64/include/asm/pgtable.h @@ -1103,7 +1103,8 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) */ const pteval_t mask = PTE_USER | PTE_PXN | PTE_UXN | PTE_RDONLY | PTE_PRESENT_INVALID | PTE_VALID | PTE_WRITE | - PTE_GP | PTE_ATTRINDX_MASK; + PTE_GP | PTE_ATTRINDX_MASK | PTE_PO_IDX_MASK; + /* preserve the hardware dirty information */ if (pte_hw_dirty(pte)) pte = set_pte_bit(pte, __pgprot(PTE_DIRTY));