From patchwork Mon Feb 20 18:37:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michael Roth X-Patchwork-Id: 13146855 X-Patchwork-Delegate: herbert@gondor.apana.org.au 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 51C35C6379F for ; Mon, 20 Feb 2023 18:49:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231514AbjBTSs6 (ORCPT ); Mon, 20 Feb 2023 13:48:58 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58664 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232636AbjBTSsp (ORCPT ); Mon, 20 Feb 2023 13:48:45 -0500 Received: from NAM10-DM6-obe.outbound.protection.outlook.com (mail-dm6nam10on20611.outbound.protection.outlook.com [IPv6:2a01:111:f400:7e88::611]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2D7621E1E0; Mon, 20 Feb 2023 10:48:04 -0800 (PST) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=VMX2wOGkJlySpYru0yrtc8ipW4M9U7j+pjwE6eN/rBBf7XxyU7S73TZPZmNjrsxMDhrfiembiR6ENAzdQXh7OdTxR5HyQ4f72hcN7k7J84EJl/xNLW3sm5og8wN+DRJGXWjC0wp2CBtbswJ2AO650a+6KivuwdRm+Yh627mfwpIIYjunykMD0ixftOyGOYEqQOVl9n7AZmWKcDmo17Z7SpgI5fDqJheN8t5DgO4TiNpLcaWmyXfF0WWbSs5jeoGeeJPdqktj0WB1PD/cNeOc0rv0v+e7GCW2l9Vin2h4MAPwmoM1XQIv1VaAiNBk2Asn04MaBRa6K8BvzaJsfwcoww== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=rrQnaVQh2mcS503DV65lMv6uDTUoE4QTksfruqEgVic=; b=PCoRF+bGEfwx+c9JYKmCWUZOZKsN3Nx1nn479TbMXSYoT7E/J0tlE2UNqlxai+u7CXYYp0AoQE81yhKNZlk+p33nhZQQXRqTCIhjfxJURPVixt/G7bVA//KIKNSNzhDP09f7CHgPmG3l6F+dwucaUgYk10rlQzEXaL27xBW7UvUzYhQ1HRdfYEcPvbXm2zV107Nu6/B/aY54WxCW8LsaXb7RHrqysW7SiOZV6MlJkmavVSDukrQpj3/tjXBLASkRWNys6m98UrKsFqy8wbdqxvMk1MGocfCjyhM+lTbn1AXno3T4f/Ci97IyJloYklFZT0s2ZWkbRyf31vVVga+2pw== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass (sender ip is 165.204.84.17) smtp.rcpttodomain=vger.kernel.org smtp.mailfrom=amd.com; dmarc=pass (p=quarantine sp=quarantine pct=100) action=none header.from=amd.com; dkim=none (message not signed); arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=amd.com; s=selector1; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=rrQnaVQh2mcS503DV65lMv6uDTUoE4QTksfruqEgVic=; b=o8OBNomizSWbxJ9cYw29Pe3QA2JSH1JVHiLDYBPK1XGHnsAbPHglnKY2+jTwJbWc835BIpYqSSJ3TAffDjwH7QkUs5g6+/uR4pt3EYXIugwpkxZGXzrFwg1XQLisPP5vBLOKw+Ecj/knJsD1b3Axw4r31cN/Q4pU4RPClVLaOII= Received: from CY5PR15CA0044.namprd15.prod.outlook.com (2603:10b6:930:1b::27) by MW3PR12MB4361.namprd12.prod.outlook.com (2603:10b6:303:5a::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6111.20; Mon, 20 Feb 2023 18:47:44 +0000 Received: from CY4PEPF0000C966.namprd02.prod.outlook.com (2603:10b6:930:1b:cafe::fc) by CY5PR15CA0044.outlook.office365.com (2603:10b6:930:1b::27) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.6111.19 via Frontend Transport; Mon, 20 Feb 2023 18:47:44 +0000 X-MS-Exchange-Authentication-Results: spf=pass (sender IP is 165.204.84.17) smtp.mailfrom=amd.com; dkim=none (message not signed) header.d=none;dmarc=pass action=none header.from=amd.com; Received-SPF: Pass (protection.outlook.com: domain of amd.com designates 165.204.84.17 as permitted sender) receiver=protection.outlook.com; client-ip=165.204.84.17; helo=SATLEXMB04.amd.com; pr=C Received: from SATLEXMB04.amd.com (165.204.84.17) by CY4PEPF0000C966.mail.protection.outlook.com (10.167.241.70) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.6134.14 via Frontend Transport; Mon, 20 Feb 2023 18:47:44 +0000 Received: from localhost (10.180.168.240) by SATLEXMB04.amd.com (10.181.40.145) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.34; Mon, 20 Feb 2023 12:47:43 -0600 From: Michael Roth To: CC: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , Subject: [PATCH RFC v8 01/56] KVM: x86: Add 'fault_is_private' x86 op Date: Mon, 20 Feb 2023 12:37:52 -0600 Message-ID: <20230220183847.59159-2-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230220183847.59159-1-michael.roth@amd.com> References: <20230220183847.59159-1-michael.roth@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CY4PEPF0000C966:EE_|MW3PR12MB4361:EE_ X-MS-Office365-Filtering-Correlation-Id: bb36044f-08b9-4aa1-a24d-08db1372f426 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230025)(4636009)(396003)(376002)(346002)(136003)(39860400002)(451199018)(46966006)(36840700001)(40470700004)(5660300002)(8936002)(426003)(47076005)(36860700001)(83380400001)(40480700001)(40460700003)(86362001)(82740400003)(186003)(356005)(81166007)(336012)(316002)(82310400005)(54906003)(478600001)(4326008)(8676002)(41300700001)(70586007)(6916009)(2616005)(16526019)(1076003)(36756003)(6666004)(26005)(70206006)(2906002)(7416002)(7406005)(44832011)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Feb 2023 18:47:44.5335 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: bb36044f-08b9-4aa1-a24d-08db1372f426 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CY4PEPF0000C966.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: MW3PR12MB4361 Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org This callback is used by the KVM MMU to check whether a #NPF was for a private GPA or not. In some cases the full 64-bit error code for the #NPF will be needed to make this determination, so also update kvm_mmu_do_page_fault() to accept the full 64-bit value so it can be plumbed through to the callback. Signed-off-by: Michael Roth Signed-off-by: Isaku Yamahata Signed-off-by: Isaku Yamahata --- arch/x86/include/asm/kvm-x86-ops.h | 1 + arch/x86/include/asm/kvm_host.h | 1 + arch/x86/kvm/mmu/mmu.c | 3 +-- arch/x86/kvm/mmu/mmu_internal.h | 37 +++++++++++++++++++++++++++--- 4 files changed, 37 insertions(+), 5 deletions(-) diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h index 8dc345cc6318..72183da010b8 100644 --- a/arch/x86/include/asm/kvm-x86-ops.h +++ b/arch/x86/include/asm/kvm-x86-ops.h @@ -131,6 +131,7 @@ KVM_X86_OP(msr_filter_changed) KVM_X86_OP(complete_emulated_msr) KVM_X86_OP(vcpu_deliver_sipi_vector) KVM_X86_OP_OPTIONAL_RET0(vcpu_get_apicv_inhibit_reasons); +KVM_X86_OP_OPTIONAL_RET0(fault_is_private); #undef KVM_X86_OP #undef KVM_X86_OP_OPTIONAL diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index e552374f2357..f856d689dda0 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -1643,6 +1643,7 @@ struct kvm_x86_ops { void (*load_mmu_pgd)(struct kvm_vcpu *vcpu, hpa_t root_hpa, int root_level); + bool (*fault_is_private)(struct kvm *kvm, gpa_t gpa, u64 error_code, bool *private_fault); bool (*has_wbinvd_exit)(void); diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index eda615f3951c..fb3f34b7391c 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -5724,8 +5724,7 @@ int noinline kvm_mmu_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, u64 err } if (r == RET_PF_INVALID) { - r = kvm_mmu_do_page_fault(vcpu, cr2_or_gpa, - lower_32_bits(error_code), false); + r = kvm_mmu_do_page_fault(vcpu, cr2_or_gpa, error_code, false); if (KVM_BUG_ON(r == RET_PF_INVALID, vcpu->kvm)) return -EIO; } diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index e642d431df4b..557a001210df 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -231,6 +231,37 @@ struct kvm_page_fault { int kvm_tdp_page_fault(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault); +static bool kvm_mmu_fault_is_private(struct kvm *kvm, gpa_t gpa, u64 err) +{ + struct kvm_memory_slot *slot; + bool private_fault = false; + gfn_t gfn = gpa_to_gfn(gpa); + + slot = gfn_to_memslot(kvm, gfn); + if (!slot) { + pr_debug("%s: no slot, GFN: 0x%llx\n", __func__, gfn); + goto out; + } + + if (!kvm_slot_can_be_private(slot)) { + pr_debug("%s: slot is not private, GFN: 0x%llx\n", __func__, gfn); + goto out; + } + + if (static_call(kvm_x86_fault_is_private)(kvm, gpa, err, &private_fault)) + goto out; + + /* + * Handling below is for UPM self-tests and guests that treat userspace + * as the authority on whether a fault should be private or not. + */ + private_fault = kvm_mem_is_private(kvm, gpa >> PAGE_SHIFT); + +out: + pr_debug("%s: GFN: 0x%llx, private: %d\n", __func__, gfn, private_fault); + return private_fault; +} + /* * Return values of handle_mmio_page_fault(), mmu.page_fault(), fast_page_fault(), * and of course kvm_mmu_do_page_fault(). @@ -262,11 +293,11 @@ enum { }; static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, - u32 err, bool prefetch) + u64 err, bool prefetch) { struct kvm_page_fault fault = { .addr = cr2_or_gpa, - .error_code = err, + .error_code = lower_32_bits(err), .exec = err & PFERR_FETCH_MASK, .write = err & PFERR_WRITE_MASK, .present = err & PFERR_PRESENT_MASK, @@ -280,7 +311,7 @@ static inline int kvm_mmu_do_page_fault(struct kvm_vcpu *vcpu, gpa_t cr2_or_gpa, .max_level = KVM_MAX_HUGEPAGE_LEVEL, .req_level = PG_LEVEL_4K, .goal_level = PG_LEVEL_4K, - .is_private = kvm_mem_is_private(vcpu->kvm, cr2_or_gpa >> PAGE_SHIFT), + .is_private = kvm_mmu_fault_is_private(vcpu->kvm, cr2_or_gpa, err), }; int r;