From mboxrd@z Thu Jan 1 00:00:00 1970 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 93649C3DA49 for ; Fri, 26 Jul 2024 23:52:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:Reply-To:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:Message-ID :References:Mime-Version:In-Reply-To:Date:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=CI8qbNEz/MrvxEYVIoyw0x94Z81QkK/OYFIk4cdhN0M=; b=HiDZymbCAN9LHl J793delOWas7fSqJ3aPPiigke56473TCmf1QlqTCI7H+gfYQ4lYcnVZpXV7lcMwEO5r0aUV8N03Ui a+m2RohdG2UwgjxyZ4159+q9hItEn7QSUKR5DhaR3KpMBd5EcrwcIe3F8Pd9FoiHEtM6oU36DocsL h5N134b35zs7+1cuKC0TmWM5N2XwYetjpeQHciv+wopWctR91yMUNrGQCv4V9uIqDx9efpmKGJJAl CL1cyPJUaCrf/0vdQixoaub3rfZ/YDNqR3XFEkV8kpmiD/dghwC1iwuInQeYgeUABM1cNA9DCN8Ep uqq49Rd3SS39VWtvYfSQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sXUjv-00000005PCy-3alm; Fri, 26 Jul 2024 23:52:47 +0000 Received: from mail-pl1-x649.google.com ([2607:f8b0:4864:20::649]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sXUjp-00000005P8A-2g4G for linux-riscv@lists.infradead.org; Fri, 26 Jul 2024 23:52:43 +0000 Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1fc52d3c76eso12293385ad.3 for ; Fri, 26 Jul 2024 16:52:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1722037960; x=1722642760; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=B44llYCZd4EZ9BiHApjJ5QQ8CK6GbkfpTxw4rYmbmqk=; b=zm3Q8cbxYWgV/ICg/XpBQIFA5ZZrUheT5124qEoiaiXcrddyX94DdP0qUCzD45kwt+ RDlY5TVAitXGwXPxoMn4gWERtB7jj3o6wCuMtvorUh8FXdD3LZLuBHIerNymmFjUchg1 B2UugSa8CQzLCMz2F6aMXicsUkh0+Xcxf0jP2sGH5MLm8U9TlZifNMbg1YfjCkWmdmWm WIbu6BHnysY/udvO2+MxiwruCh2amZM0c3IBBl7dJT129UFrBxRyeE7pdUIf0U7+UKMb DP23v07HGXZL/WrCAcfDvW6hjnes8bdkxeQU2b9s8xm0sEA3icUbvNCUKBcl2jbmHEIt Phsg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1722037960; x=1722642760; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=B44llYCZd4EZ9BiHApjJ5QQ8CK6GbkfpTxw4rYmbmqk=; b=qtkGfHcVPFLrB65HaRnSfIiZAsbNqyj9mWD7XDCCC6mysFoCjYYsRRjZtZpZi80wt5 gyU1xb6sCOuPugT1kLDjE6bDOHuWqGPYWK6WresfiyVieru8Ms9/dwwGOyK9mP4nWdhQ 0x4Ogw3+Zz6BKkoTKGqCV1FbbNIBaq173Tc2mqokWTUak4fpeMMGQYapQqrBoIzAamtH A0135isCiAyzfq6H7yjOwVXSM5pGqoGZ3X1N4RLXZEs47SgERSchoyr1G8Zjh+DQDMXY SGJhr25yqyr08/OF2VXtyjyjtXgNNVuG/nf7J896ZoTeo+Y14ktr007R3yFkGF2RzAtI aIAg== X-Forwarded-Encrypted: i=1; AJvYcCWNZWCJcguU+5TtNmkY5pu/GclNnASS5xwH0z0aNfJNEeAR07qMjHN7pC75tYQSjCYhMZIfw8SBFKOalaGMy7UxP+yMRNJ3BnxhXVFtBLuw X-Gm-Message-State: AOJu0YyEiFrqZRUtd95wF6BT3HVbaLrauwBS4OTE30XXJ9Hx9p7NpF2F Ur23EGy3Hv1rSe59FXlcf59TiusKmEFpySGVXPwDt7S8VumRULWJsLrWXr/yLAd3qvJb9UKoZOT lMQ== X-Google-Smtp-Source: AGHT+IEjG0ZQEVlDvyCmqtjyibvaIBPxkBHQDdDjj94pZYYC/xb/lJ2iSbTktb4rvu/gOGNYLlpIc1q2Vcw= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a17:903:2b0e:b0:1fd:7097:af5c with SMTP id d9443c01a7336-1ff048d8505mr410065ad.11.1722037959655; Fri, 26 Jul 2024 16:52:39 -0700 (PDT) Date: Fri, 26 Jul 2024 16:51:10 -0700 In-Reply-To: <20240726235234.228822-1-seanjc@google.com> Mime-Version: 1.0 References: <20240726235234.228822-1-seanjc@google.com> X-Mailer: git-send-email 2.46.0.rc1.232.g9752f9e123-goog Message-ID: <20240726235234.228822-2-seanjc@google.com> Subject: [PATCH v12 01/84] KVM: arm64: Release pfn, i.e. put page, if copying MTE tags hits ZONE_DEVICE From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Matlack , David Stevens X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240726_165241_725246_9ED4E247 X-CRM114-Status: UNSURE ( 8.04 ) X-CRM114-Notice: Please train this message. X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Put the page reference acquired by gfn_to_pfn_prot() if kvm_vm_ioctl_mte_copy_tags() runs into ZONE_DEVICE memory. KVM's less- than-stellar heuristics for dealing with pfn-mapped memory means that KVM can get a page reference to ZONE_DEVICE memory. Fixes: f0376edb1ddc ("KVM: arm64: Add ioctl to fetch/store tags in a guest") Signed-off-by: Sean Christopherson --- arch/arm64/kvm/guest.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 11098eb7eb44..e1f0ff08836a 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -1059,6 +1059,7 @@ int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm, page = pfn_to_online_page(pfn); if (!page) { /* Reject ZONE_DEVICE memory */ + kvm_release_pfn_clean(pfn); ret = -EFAULT; goto out; } -- 2.46.0.rc1.232.g9752f9e123-goog _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv