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Peter Anvin" Subject: [RFC 15/16] KVM: selftests: add SEV-SNP boot tests Date: Tue, 5 Oct 2021 18:44:58 -0500 Message-Id: <20211005234459.430873-16-michael.roth@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20211005234459.430873-1-michael.roth@amd.com> References: <20211005234459.430873-1-michael.roth@amd.com> X-ClientProxiedBy: SA0PR12CA0007.namprd12.prod.outlook.com (2603:10b6:806:6f::12) To CH2PR12MB4133.namprd12.prod.outlook.com (2603:10b6:610:7a::13) MIME-Version: 1.0 Received: from localhost (165.204.77.1) by SA0PR12CA0007.namprd12.prod.outlook.com (2603:10b6:806:6f::12) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4587.18 via Frontend Transport; Tue, 5 Oct 2021 23:45:56 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: e8a4d8f8-0054-4700-f5b9-08d9885a468c X-MS-TrafficTypeDiagnostic: CH2PR12MB3925: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:5797; 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:255.255.255.255;CTRY:;LANG:en;SCL:5;SRV:;IPV:NLI;SFV:SPM;H:CH2PR12MB4133.namprd12.prod.outlook.com;PTR:;CAT:OSPM;SFS:(4636009)(366004)(8936002)(5660300002)(6486002)(6916009)(316002)(8676002)(44832011)(26005)(54906003)(66946007)(38350700002)(66556008)(66476007)(83380400001)(38100700002)(52116002)(956004)(508600001)(36756003)(7416002)(86362001)(2616005)(4326008)(1076003)(6496006)(186003)(2906002)(23200700001);DIR:OUT;SFP:1501; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: 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 X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-Network-Message-Id: e8a4d8f8-0054-4700-f5b9-08d9885a468c X-MS-Exchange-CrossTenant-AuthSource: CH2PR12MB4133.namprd12.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Oct 2021 23:45:56.6422 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: Jyd/GhVc6hYbUuVsG+tfzM6UhLxhWzfVWRte60h3RlDw6f5GALaXPolZ8Mnqql0loNkkLLBXls70zYw81kINYw== X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH2PR12MB3925 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org Extend the existing SEV/SEV-ES boot tests to also cover SEV-SNP guests. Also add a basic test to check validation state of initial guest memory. Signed-off-by: Michael Roth --- .../selftests/kvm/include/x86_64/svm_util.h | 1 + .../selftests/kvm/x86_64/sev_all_boot_test.c | 86 +++++++++++++++---- 2 files changed, 71 insertions(+), 16 deletions(-) diff --git a/tools/testing/selftests/kvm/include/x86_64/svm_util.h b/tools/testing/selftests/kvm/include/x86_64/svm_util.h index 4319bb6f4691..6c51fc304ce9 100644 --- a/tools/testing/selftests/kvm/include/x86_64/svm_util.h +++ b/tools/testing/selftests/kvm/include/x86_64/svm_util.h @@ -18,6 +18,7 @@ #define SVM_EXIT_CPUID 0x072 #define SVM_EXIT_VMMCALL 0x081 +#define SVM_EXIT_NOT_VALIDATED 0x404 struct svm_test_data { /* VMCB */ diff --git a/tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c b/tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c index 58c57c4c0ec1..3d8048efa25f 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c +++ b/tools/testing/selftests/kvm/x86_64/sev_all_boot_test.c @@ -217,6 +217,48 @@ guest_sev_es_code(struct sev_sync_data *sync, uint8_t *shared_buf, guest_test_done(sync); } +static void __attribute__((__flatten__)) +guest_sev_snp_code(struct sev_sync_data *sync, uint8_t *shared_buf, + uint8_t *private_buf, uint64_t ghcb_gpa, void *ghcb_gva) +{ + uint32_t eax, ebx, ecx, edx, token = 1; + uint64_t sev_status; + int ret; + + guest_test_start(sync); + +again: + /* Check CPUID values via GHCB MSR protocol. */ + eax = 0x8000001f; + ecx = 0; + cpuid(&eax, &ebx, &ecx, &edx); + + /* Check SEV bit. */ + SEV_GUEST_ASSERT(sync, token++, eax & (1 << 1)); + /* Check SEV-ES bit. */ + SEV_GUEST_ASSERT(sync, token++, eax & (1 << 3)); + + if (!ghcb0_gva) { + ghcb0_gva = ghcb_gva; + ghcb0_gpa = ghcb_gpa; + snp_register_ghcb(ghcb0_gpa); + /* Check CPUID bits again using GHCB-based protocol. */ + goto again; + } + + /* Check SEV/SEV-ES/SEV-SNP enabled bits (bits 0, 1, and 3, respectively). */ + sev_status = rdmsr(MSR_AMD64_SEV); + SEV_GUEST_ASSERT(sync, token++, (sev_status & 0x7) == 7); + + /* Confirm private data was validated by FW prior to boot. */ + ret = snp_pvalidate(private_buf, 0, true); + SEV_GUEST_ASSERT(sync, token++, ret == PVALIDATE_NO_UPDATE); + + guest_test_common(sync, shared_buf, private_buf); + + guest_test_done(sync); +} + static void setup_test_common(struct sev_vm *sev, void *guest_code, vm_vaddr_t *sync_vaddr, vm_vaddr_t *shared_vaddr, vm_vaddr_t *private_vaddr) @@ -244,7 +286,7 @@ setup_test_common(struct sev_vm *sev, void *guest_code, vm_vaddr_t *sync_vaddr, fill_buf(private_buf, PRIVATE_PAGES, PAGE_STRIDE, 0x42); } -static void test_sev(void *guest_code, uint64_t policy) +static void test_sev(void *guest_code, bool snp, uint64_t policy) { vm_vaddr_t sync_vaddr, shared_vaddr, private_vaddr; uint8_t *shared_buf, *private_buf; @@ -254,7 +296,8 @@ static void test_sev(void *guest_code, uint64_t policy) struct kvm_vm *vm; int i; - sev = sev_vm_create(policy, TOTAL_PAGES); + sev = snp ? sev_snp_vm_create(policy, TOTAL_PAGES) + : sev_vm_create(policy, TOTAL_PAGES); if (!sev) return; vm = sev_get_vm(sev); @@ -262,7 +305,7 @@ static void test_sev(void *guest_code, uint64_t policy) setup_test_common(sev, guest_code, &sync_vaddr, &shared_vaddr, &private_vaddr); /* Set up guest params. */ - if (policy & SEV_POLICY_ES) { + if (snp || (policy & SEV_POLICY_ES)) { vm_vaddr_t ghcb_vaddr = vm_vaddr_alloc_shared(vm, PAGE_SIZE, 0); vcpu_args_set(vm, VCPU_ID, 6, sync_vaddr, shared_vaddr, private_vaddr, @@ -280,34 +323,45 @@ static void test_sev(void *guest_code, uint64_t policy) private_buf = addr_gva2hva(vm, private_vaddr); /* Allocations/setup done. Encrypt initial guest payload. */ - sev_vm_launch(sev); + if (snp) { + sev_snp_vm_launch(sev); + } else { + sev_vm_launch(sev); - /* Dump the initial measurement. A test to actually verify it would be nice. */ - sev_vm_measure(sev, measurement); - pr_info("guest measurement: "); - for (i = 0; i < 32; ++i) - pr_info("%02x", measurement[i]); - pr_info("\n"); + /* Dump the initial measurement. A test to actually verify it would be nice. */ + sev_vm_measure(sev, measurement); + pr_info("guest measurement: "); + for (i = 0; i < 32; ++i) + pr_info("%02x", measurement[i]); + pr_info("\n"); - sev_vm_launch_finish(sev); + sev_vm_launch_finish(sev); + } /* Guest is ready to run. Do the tests. */ check_test_start(vm, sync); check_test_common(vm, sync, shared_buf, private_buf); check_test_done(vm, sync); - sev_vm_free(sev); + if (snp) + sev_snp_vm_free(sev); + else + sev_vm_free(sev); } int main(int argc, char *argv[]) { /* SEV tests */ - test_sev(guest_sev_code, SEV_POLICY_NO_DBG); - test_sev(guest_sev_code, 0); + test_sev(guest_sev_code, false, SEV_POLICY_NO_DBG); + test_sev(guest_sev_code, false, 0); /* SEV-ES tests */ - test_sev(guest_sev_es_code, SEV_POLICY_ES | SEV_POLICY_NO_DBG); - test_sev(guest_sev_es_code, SEV_POLICY_ES); + test_sev(guest_sev_es_code, false, SEV_POLICY_ES | SEV_POLICY_NO_DBG); + test_sev(guest_sev_es_code, false, SEV_POLICY_ES); + + /* SEV-SNP tests */ + test_sev(guest_sev_snp_code, true, SNP_POLICY_SMT); + test_sev(guest_sev_snp_code, true, SNP_POLICY_SMT | SNP_POLICY_DBG); return 0; }