From patchwork Mon Dec 13 17:33:54 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brijesh Singh X-Patchwork-Id: 12674445 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 D9DCEC433F5 for ; Mon, 13 Dec 2021 17:34:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241364AbhLMRek (ORCPT ); Mon, 13 Dec 2021 12:34:40 -0500 Received: from mail-dm6nam10on2087.outbound.protection.outlook.com ([40.107.93.87]:52864 "EHLO NAM10-DM6-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S235736AbhLMRei (ORCPT ); Mon, 13 Dec 2021 12:34:38 -0500 ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=hAW5wSFUf62jPmiLrMN0gUI5UYIrjHB6wD+l4bmJv+8NyTm8PniN9pNUbO8URGasn1+4NaO2GZd0iV2Ug9OJ9nRZ74F9L9tRIa+kIxGGOiULGlyyJRa36EKdkcXBx2a9RJHKlHeSepb2oy3jmB/yLsxG+WrVnYvyA7fF4cogGFc6/D++EkzKI7d+tksIGZgKNrbD3prFGAYFvoe9GiJdtB8S70iP8qNEjU8HLgghTHisGWfqQFElHAS33iwykwipXcbv/3R6FaWojz/TR9EbDmwg4K0Ck/McomavMZpHWnqibhjedMK63qzkpIyAubpr+WGT+wdnMg2si6x0bgrh3g== 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=iaH7YlHQEbNRCtT2xWBnDxe2GbR3iPgmIpIDLW9LG0I=; b=ZTkAv3vT+Nzu0rlUmLo3CgMqFJYXNtuIfLAiZ+hjcCPQF7/RW8kgDjqUJ6RPNHYMUkNxoAiyrJ65mHs77f+g0rqK8LOjJ9fOYpcOr7l9uz9SkajqmWSPO+R08OvMjMFCJhH+P1OZqOnfmzlrODD1boq+EO6QvxVgm0n6u8ZOeizWvd9oXlSPAQAJe4OV1hRMUWW3fhEa5lPVMuFsnnz4IRPqQ01zF01M3IzRiBXS9otfdMe1QO3/IQiGQZVSMbeMMYjMLBnpjeke/dL8gsF54NjGRMWZIg+x2wMwrxqEWVfrjdGRQojyNLlZr+QOzLEev0x1t2EHVdzgnMAuj+fRIQ== 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=iaH7YlHQEbNRCtT2xWBnDxe2GbR3iPgmIpIDLW9LG0I=; b=Z0wpv3bQml0GhpqdkV9DOLeXTRumrRXCBSpEgqvDxp+ZRVj5lZaDv1HLGe1+5AIjJBRhUrzfWanblf/RASpi+YSw6/PJe6KrbJg1phrfvctXwtZUSnfUm/iShzGJFGh/aZN/u7rd3nfMyg3LhwxxE1RMqLpu3UXiXPTglQ/OFc4= Received: from BN6PR17CA0028.namprd17.prod.outlook.com (2603:10b6:405:75::17) by SJ0PR12MB5456.namprd12.prod.outlook.com (2603:10b6:a03:3ae::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4778.17; Mon, 13 Dec 2021 17:34:34 +0000 Received: from BN8NAM11FT010.eop-nam11.prod.protection.outlook.com (2603:10b6:405:75:cafe::68) by BN6PR17CA0028.outlook.office365.com (2603:10b6:405:75::17) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4778.13 via Frontend Transport; Mon, 13 Dec 2021 17:34:34 +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=SATLEXMB03.amd.com; Received: from SATLEXMB03.amd.com (165.204.84.17) by BN8NAM11FT010.mail.protection.outlook.com (10.13.177.53) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.20.4778.13 via Frontend Transport; Mon, 13 Dec 2021 17:34:34 +0000 Received: from sbrijesh-desktop.amd.com (10.180.168.240) by SATLEXMB03.amd.com (10.181.40.144) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.2375.17; Mon, 13 Dec 2021 11:34:26 -0600 From: Brijesh Singh To: CC: , , Ingo Molnar , Joerg Roedel , Tom Lendacky , Paolo Bonzini , "Sean Christopherson" , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , "Andy Lutomirski" , Dave Hansen , David Rientjes , Peter Gonda , Borislav Petkov , , , Brijesh Singh Subject: [PATCH 2/4] KVM: SVM: Create a separate mapping for the SEV-ES save area Date: Mon, 13 Dec 2021 11:33:54 -0600 Message-ID: <20211213173356.138726-3-brijesh.singh@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211213173356.138726-1-brijesh.singh@amd.com> References: <20211213173356.138726-1-brijesh.singh@amd.com> MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB03.amd.com (10.181.40.144) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 2151fe4c-3541-4837-2fe5-08d9be5ed426 X-MS-TrafficTypeDiagnostic: SJ0PR12MB5456:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:8882; 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:SATLEXMB03.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(4636009)(46966006)(36840700001)(40470700001)(16526019)(2616005)(186003)(86362001)(82310400004)(54906003)(336012)(81166007)(83380400001)(6916009)(8676002)(426003)(47076005)(508600001)(8936002)(356005)(26005)(6666004)(7696005)(70206006)(70586007)(5660300002)(36860700001)(316002)(40460700001)(2906002)(36756003)(44832011)(4326008)(1076003)(7416002)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Dec 2021 17:34:34.4667 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2151fe4c-3541-4837-2fe5-08d9be5ed426 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: BN8NAM11FT010.eop-nam11.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB5456 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org From: Tom Lendacky The save area for SEV-ES/SEV-SNP guests, as used by the hardware, is different from the save area of a non SEV-ES/SEV-SNP guest. This is the first step in defining the multiple save areas to keep them separate and ensuring proper operation amongst the different types of guests. Create an SEV-ES/SEV-SNP save area and adjust usage to the new save area definition where needed. Signed-off-by: Tom Lendacky Signed-off-by: Brijesh Singh --- arch/x86/include/asm/svm.h | 87 +++++++++++++++++++++++++++++--------- arch/x86/kvm/svm/sev.c | 24 +++++------ arch/x86/kvm/svm/svm.h | 2 +- 3 files changed, 80 insertions(+), 33 deletions(-) diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h index 7c9cf4f3c164..3ce2e575a2de 100644 --- a/arch/x86/include/asm/svm.h +++ b/arch/x86/include/asm/svm.h @@ -227,6 +227,7 @@ struct vmcb_seg { u64 base; } __packed; +/* Save area definition for legacy and SEV-MEM guests */ struct vmcb_save_area { struct vmcb_seg es; struct vmcb_seg cs; @@ -243,8 +244,58 @@ struct vmcb_save_area { u8 cpl; u8 reserved_2[4]; u64 efer; + u8 reserved_3[112]; + u64 cr4; + u64 cr3; + u64 cr0; + u64 dr7; + u64 dr6; + u64 rflags; + u64 rip; + u8 reserved_4[88]; + u64 rsp; + u64 s_cet; + u64 ssp; + u64 isst_addr; + u64 rax; + u64 star; + u64 lstar; + u64 cstar; + u64 sfmask; + u64 kernel_gs_base; + u64 sysenter_cs; + u64 sysenter_esp; + u64 sysenter_eip; + u64 cr2; + u8 reserved_5[32]; + u64 g_pat; + u64 dbgctl; + u64 br_from; + u64 br_to; + u64 last_excp_from; + u64 last_excp_to; + u8 reserved_6[72]; + u32 spec_ctrl; /* Guest version of SPEC_CTRL at 0x2E0 */ +} __packed; + +/* Save area definition for SEV-ES and SEV-SNP guests */ +struct sev_es_save_area { + struct vmcb_seg es; + struct vmcb_seg cs; + struct vmcb_seg ss; + struct vmcb_seg ds; + struct vmcb_seg fs; + struct vmcb_seg gs; + struct vmcb_seg gdtr; + struct vmcb_seg ldtr; + struct vmcb_seg idtr; + struct vmcb_seg tr; + u8 reserved_1[43]; + u8 cpl; + u8 reserved_2[4]; + u64 efer; u8 reserved_3[104]; - u64 xss; /* Valid for SEV-ES only */ + u64 xss; u64 cr4; u64 cr3; u64 cr0; @@ -272,22 +323,14 @@ struct vmcb_save_area { u64 br_to; u64 last_excp_from; u64 last_excp_to; - - /* - * The following part of the save area is valid only for - * SEV-ES guests when referenced through the GHCB or for - * saving to the host save area. - */ - u8 reserved_7[72]; - u32 spec_ctrl; /* Guest version of SPEC_CTRL at 0x2E0 */ - u8 reserved_7b[4]; + u8 reserved_7[80]; u32 pkru; - u8 reserved_7a[20]; - u64 reserved_8; /* rax already available at 0x01f8 */ + u8 reserved_9[20]; + u64 reserved_10; /* rax already available at 0x01f8 */ u64 rcx; u64 rdx; u64 rbx; - u64 reserved_9; /* rsp already available at 0x01d8 */ + u64 reserved_11; /* rsp already available at 0x01d8 */ u64 rbp; u64 rsi; u64 rdi; @@ -299,23 +342,25 @@ struct vmcb_save_area { u64 r13; u64 r14; u64 r15; - u8 reserved_10[16]; + u8 reserved_12[16]; u64 sw_exit_code; u64 sw_exit_info_1; u64 sw_exit_info_2; u64 sw_scratch; u64 sev_features; - u8 reserved_11[48]; + u8 reserved_13[48]; u64 xcr0; u8 valid_bitmap[16]; u64 x87_state_gpa; } __packed; +#define GHCB_SHARED_BUF_SIZE 2032 + struct ghcb { - struct vmcb_save_area save; - u8 reserved_save[2048 - sizeof(struct vmcb_save_area)]; + struct sev_es_save_area save; + u8 reserved_save[2048 - sizeof(struct sev_es_save_area)]; - u8 shared_buffer[2032]; + u8 shared_buffer[GHCB_SHARED_BUF_SIZE]; u8 reserved_1[10]; u16 protocol_version; /* negotiated SEV-ES/GHCB protocol version */ @@ -323,13 +368,15 @@ struct ghcb { } __packed; -#define EXPECTED_VMCB_SAVE_AREA_SIZE 1032 +#define EXPECTED_VMCB_SAVE_AREA_SIZE 740 +#define EXPECTED_SEV_ES_SAVE_AREA_SIZE 1032 #define EXPECTED_VMCB_CONTROL_AREA_SIZE 1024 #define EXPECTED_GHCB_SIZE PAGE_SIZE static inline void __unused_size_checks(void) { BUILD_BUG_ON(sizeof(struct vmcb_save_area) != EXPECTED_VMCB_SAVE_AREA_SIZE); + BUILD_BUG_ON(sizeof(struct sev_es_save_area) != EXPECTED_SEV_ES_SAVE_AREA_SIZE); BUILD_BUG_ON(sizeof(struct vmcb_control_area) != EXPECTED_VMCB_CONTROL_AREA_SIZE); BUILD_BUG_ON(sizeof(struct ghcb) != EXPECTED_GHCB_SIZE); } @@ -399,7 +446,7 @@ struct vmcb { /* GHCB Accessor functions */ #define GHCB_BITMAP_IDX(field) \ - (offsetof(struct vmcb_save_area, field) / sizeof(u64)) + (offsetof(struct sev_es_save_area, field) / sizeof(u64)) #define DEFINE_GHCB_ACCESSORS(field) \ static inline bool ghcb_##field##_is_valid(const struct ghcb *ghcb) \ diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 322553322202..c79da6af40b6 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -558,12 +558,20 @@ static int sev_launch_update_data(struct kvm *kvm, struct kvm_sev_cmd *argp) static int sev_es_sync_vmsa(struct vcpu_svm *svm) { - struct vmcb_save_area *save = &svm->vmcb->save; + struct sev_es_save_area *save = svm->sev_es.vmsa; /* Check some debug related fields before encrypting the VMSA */ - if (svm->vcpu.guest_debug || (save->dr7 & ~DR7_FIXED_1)) + if (svm->vcpu.guest_debug || (svm->vmcb->save.dr7 & ~DR7_FIXED_1)) return -EINVAL; + /* + * SEV-ES will use a VMSA that is pointed to by the VMCB, not + * the traditional VMSA that is part of the VMCB. Copy the + * traditional VMSA as it has been built so far (in prep + * for LAUNCH_UPDATE_VMSA) to be the initial SEV-ES state. + */ + memcpy(save, &svm->vmcb->save, sizeof(svm->vmcb->save)); + /* Sync registgers */ save->rax = svm->vcpu.arch.regs[VCPU_REGS_RAX]; save->rbx = svm->vcpu.arch.regs[VCPU_REGS_RBX]; @@ -591,14 +599,6 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm) save->xss = svm->vcpu.arch.ia32_xss; save->dr6 = svm->vcpu.arch.dr6; - /* - * SEV-ES will use a VMSA that is pointed to by the VMCB, not - * the traditional VMSA that is part of the VMCB. Copy the - * traditional VMSA as it has been built so far (in prep - * for LAUNCH_UPDATE_VMSA) to be the initial SEV-ES state. - */ - memcpy(svm->sev_es.vmsa, save, sizeof(*save)); - return 0; } @@ -2905,7 +2905,7 @@ void sev_es_vcpu_reset(struct vcpu_svm *svm) void sev_es_prepare_guest_switch(struct vcpu_svm *svm, unsigned int cpu) { struct svm_cpu_data *sd = per_cpu(svm_data, cpu); - struct vmcb_save_area *hostsa; + struct sev_es_save_area *hostsa; /* * As an SEV-ES guest, hardware will restore the host state on VMEXIT, @@ -2915,7 +2915,7 @@ void sev_es_prepare_guest_switch(struct vcpu_svm *svm, unsigned int cpu) vmsave(__sme_page_pa(sd->save_area)); /* XCR0 is restored on VMEXIT, save the current host value */ - hostsa = (struct vmcb_save_area *)(page_address(sd->save_area) + 0x400); + hostsa = (struct sev_es_save_area *)(page_address(sd->save_area) + 0x400); hostsa->xcr0 = xgetbv(XCR_XFEATURE_ENABLED_MASK); /* PKRU is restored on VMEXIT, save the current host value */ diff --git a/arch/x86/kvm/svm/svm.h b/arch/x86/kvm/svm/svm.h index daa8ca84afcc..d383d477bb29 100644 --- a/arch/x86/kvm/svm/svm.h +++ b/arch/x86/kvm/svm/svm.h @@ -168,7 +168,7 @@ struct svm_nested_state { struct vcpu_sev_es_state { /* SEV-ES support */ - struct vmcb_save_area *vmsa; + struct sev_es_save_area *vmsa; struct ghcb *ghcb; struct kvm_host_map ghcb_map; bool received_first_sipi;