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Sampat" To: CC: , , , , , , , , , Subject: [PATCH v4 1/8] KVM: SEV: Disable SEV-SNP on FW validation failure Date: Thu, 14 Nov 2024 17:40:57 -0600 Message-ID: <20241114234104.128532-2-pratikrajesh.sampat@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> References: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: CO1PEPF000044F5:EE_|DM6PR12MB4370:EE_ X-MS-Office365-Filtering-Correlation-Id: 1b2a70cd-673e-48c7-61c4-08dd0505d8a2 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; 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:(13230040)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2024 23:41:22.2255 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 1b2a70cd-673e-48c7-61c4-08dd0505d8a2 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: CO1PEPF000044F5.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR12MB4370 On incompatible firmware versions, SEV-SNP support is pulled and the setup is not performed. However, the platform and subsequently the KVM capability may continue to advertize support for it. Disable support for SEV-SNP if the FW version validation fails. Fixes: 1dfe571c12cf ("KVM: SEV: Add initial SEV-SNP support") Signed-off-by: Pratik R. Sampat --- arch/x86/kvm/svm/sev.c | 4 +++- drivers/crypto/ccp/sev-dev.c | 6 ++++++ include/linux/psp-sev.h | 3 +++ 3 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c index 72674b8825c4..5ced00e54f0e 100644 --- a/arch/x86/kvm/svm/sev.c +++ b/arch/x86/kvm/svm/sev.c @@ -3053,7 +3053,9 @@ void __init sev_hardware_setup(void) sev_es_asid_count = min_sev_asid - 1; WARN_ON_ONCE(misc_cg_set_capacity(MISC_CG_RES_SEV_ES, sev_es_asid_count)); sev_es_supported = true; - sev_snp_supported = sev_snp_enabled && cc_platform_has(CC_ATTR_HOST_SEV_SNP); + sev_snp_supported = (sev_snp_enabled && + cc_platform_has(CC_ATTR_HOST_SEV_SNP) && + snp_fw_valid()); out: if (boot_cpu_has(X86_FEATURE_SEV)) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index af018afd9cd7..b45cd60c19b0 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -122,6 +122,12 @@ static inline bool sev_version_greater_or_equal(u8 maj, u8 min) return false; } +bool snp_fw_valid(void) +{ + return sev_version_greater_or_equal(SNP_MIN_API_MAJOR, SNP_MIN_API_MINOR); +} +EXPORT_SYMBOL_GPL(snp_fw_valid); + static void sev_irq_handler(int irq, void *data, unsigned int status) { struct sev_device *sev = data; diff --git a/include/linux/psp-sev.h b/include/linux/psp-sev.h index 903ddfea8585..e841a8fbbb15 100644 --- a/include/linux/psp-sev.h +++ b/include/linux/psp-sev.h @@ -945,6 +945,7 @@ int sev_do_cmd(int cmd, void *data, int *psp_ret); void *psp_copy_user_blob(u64 uaddr, u32 len); void *snp_alloc_firmware_page(gfp_t mask); void snp_free_firmware_page(void *addr); +bool snp_fw_valid(void); #else /* !CONFIG_CRYPTO_DEV_SP_PSP */ @@ -979,6 +980,8 @@ static inline void *snp_alloc_firmware_page(gfp_t mask) static inline void snp_free_firmware_page(void *addr) { } +static inline bool snp_fw_valid(void) { return false; } + #endif /* CONFIG_CRYPTO_DEV_SP_PSP */ #endif /* __PSP_SEV_H__ */ From patchwork Thu Nov 14 23:40:58 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Sampat" To: CC: , , , , , , , , , Subject: [PATCH v4 2/8] KVM: selftests: SEV-SNP test for KVM_SEV_INIT2 Date: Thu, 14 Nov 2024 17:40:58 -0600 Message-ID: <20241114234104.128532-3-pratikrajesh.sampat@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> References: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: CO1PEPF000044F4:EE_|IA1PR12MB7640:EE_ X-MS-Office365-Filtering-Correlation-Id: 975c1e84-a661-4b34-c065-08dd0505df5a X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|82310400026|36860700013|1800799024; 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:(13230040)(376014)(82310400026)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2024 23:41:33.4376 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 975c1e84-a661-4b34-c065-08dd0505df5a 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: CO1PEPF000044F4.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: IA1PR12MB7640 Add the X86_FEATURE_SNP CPU feature to the architectural definition for the SEV-SNP VM type to exercise the KVM_SEV_INIT2 call. Ensure that the SNP test is skipped in scenarios where CPUID supports it but KVM does not, so that a failure is not reported in such cases. Signed-off-by: Pratik R. Sampat --- .../selftests/kvm/include/x86_64/processor.h | 1 + .../testing/selftests/kvm/x86_64/sev_init2_tests.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h index 645200e95f89..c18d2405798f 100644 --- a/tools/testing/selftests/kvm/include/x86_64/processor.h +++ b/tools/testing/selftests/kvm/include/x86_64/processor.h @@ -199,6 +199,7 @@ struct kvm_x86_cpu_feature { #define X86_FEATURE_VGIF KVM_X86_CPU_FEATURE(0x8000000A, 0, EDX, 16) #define X86_FEATURE_SEV KVM_X86_CPU_FEATURE(0x8000001F, 0, EAX, 1) #define X86_FEATURE_SEV_ES KVM_X86_CPU_FEATURE(0x8000001F, 0, EAX, 3) +#define X86_FEATURE_SNP KVM_X86_CPU_FEATURE(0x8000001F, 0, EAX, 4) /* * KVM defined paravirt features. diff --git a/tools/testing/selftests/kvm/x86_64/sev_init2_tests.c b/tools/testing/selftests/kvm/x86_64/sev_init2_tests.c index 3fb967f40c6a..3f8fb2cc3431 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_init2_tests.c +++ b/tools/testing/selftests/kvm/x86_64/sev_init2_tests.c @@ -28,6 +28,7 @@ int kvm_fd; u64 supported_vmsa_features; bool have_sev_es; +bool have_snp; static int __sev_ioctl(int vm_fd, int cmd_id, void *data) { @@ -83,6 +84,9 @@ void test_vm_types(void) if (have_sev_es) test_init2(KVM_X86_SEV_ES_VM, &(struct kvm_sev_init){}); + if (have_snp) + test_init2(KVM_X86_SNP_VM, &(struct kvm_sev_init){}); + test_init2_invalid(0, &(struct kvm_sev_init){}, "VM type is KVM_X86_DEFAULT_VM"); if (kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SW_PROTECTED_VM)) @@ -138,15 +142,24 @@ int main(int argc, char *argv[]) "sev-es: KVM_CAP_VM_TYPES (%x) does not match cpuid (checking %x)", kvm_check_cap(KVM_CAP_VM_TYPES), 1 << KVM_X86_SEV_ES_VM); + have_snp = kvm_check_cap(KVM_CAP_VM_TYPES) & BIT(KVM_X86_SNP_VM); + TEST_ASSERT(!have_snp || kvm_cpu_has(X86_FEATURE_SNP), + "sev-snp: KVM_CAP_VM_TYPES (%x) indicates SNP support (bit %d), but CPUID does not", + kvm_check_cap(KVM_CAP_VM_TYPES), KVM_X86_SNP_VM); + test_vm_types(); test_flags(KVM_X86_SEV_VM); if (have_sev_es) test_flags(KVM_X86_SEV_ES_VM); + if (have_snp) + test_flags(KVM_X86_SNP_VM); test_features(KVM_X86_SEV_VM, 0); if (have_sev_es) test_features(KVM_X86_SEV_ES_VM, supported_vmsa_features); + if (have_snp) + test_features(KVM_X86_SNP_VM, supported_vmsa_features); return 0; } From patchwork Thu Nov 14 23:40:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Sampat" To: CC: , , , , , , , , , Subject: [PATCH v4 3/8] KVM: selftests: Add VMGEXIT helper Date: Thu, 14 Nov 2024 17:40:59 -0600 Message-ID: <20241114234104.128532-4-pratikrajesh.sampat@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> References: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: CO1PEPF000044EF:EE_|DS7PR12MB6214:EE_ X-MS-Office365-Filtering-Correlation-Id: b38fcf4f-983d-4c50-d763-08dd0505e8cc X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|376014|36860700013|1800799024; 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:(13230040)(82310400026)(376014)(36860700013)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2024 23:41:49.3473 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b38fcf4f-983d-4c50-d763-08dd0505e8cc 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: CO1PEPF000044EF.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR12MB6214 Abstract rep vmmcall coded into the VMGEXIT helper for the sev library. No functional change intended. Signed-off-by: Pratik R. Sampat --- tools/testing/selftests/kvm/include/x86_64/sev.h | 2 ++ tools/testing/selftests/kvm/x86_64/sev_smoke_test.c | 2 +- 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/include/x86_64/sev.h b/tools/testing/selftests/kvm/include/x86_64/sev.h index 82c11c81a956..e7df5d0987f6 100644 --- a/tools/testing/selftests/kvm/include/x86_64/sev.h +++ b/tools/testing/selftests/kvm/include/x86_64/sev.h @@ -27,6 +27,8 @@ enum sev_guest_state { #define GHCB_MSR_TERM_REQ 0x100 +#define VMGEXIT() { __asm__ __volatile__("rep; vmmcall"); } + void sev_vm_launch(struct kvm_vm *vm, uint32_t policy); void sev_vm_launch_measure(struct kvm_vm *vm, uint8_t *measurement); void sev_vm_launch_finish(struct kvm_vm *vm); diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c index ae77698e6e97..97d9989c8011 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c @@ -27,7 +27,7 @@ static void guest_sev_es_code(void) * force "termination" to signal "done" via the GHCB MSR protocol. */ wrmsr(MSR_AMD64_SEV_ES_GHCB, GHCB_MSR_TERM_REQ); - __asm__ __volatile__("rep; vmmcall"); + VMGEXIT(); } static void guest_sev_code(void) From patchwork Thu Nov 14 23:41:00 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Sampat" To: CC: , , , , , , , , , Subject: [PATCH v4 4/8] KVM: selftests: Introduce SEV VM type check Date: Thu, 14 Nov 2024 17:41:00 -0600 Message-ID: <20241114234104.128532-5-pratikrajesh.sampat@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> References: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: CO1PEPF000044F4:EE_|DM4PR12MB6009:EE_ X-MS-Office365-Filtering-Correlation-Id: ab2b42b7-aa3c-427f-116b-08dd0505f45b X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|1800799024|82310400026|376014; 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:(13230040)(36860700013)(1800799024)(82310400026)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2024 23:42:08.7344 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: ab2b42b7-aa3c-427f-116b-08dd0505f45b 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: CO1PEPF000044F4.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM4PR12MB6009 In preparation for SNP, declutter the vm type check by introducing a SEV-SNP VM type check as well a transitive set of helper functions. The SNP VM type is the subset of SEV-ES. Similarly, the SEV-ES and SNP types are subset of the SEV VM type check. Signed-off-by: Pratik R. Sampat --- .../testing/selftests/kvm/include/x86_64/sev.h | 4 ++++ .../selftests/kvm/lib/x86_64/processor.c | 4 ++-- tools/testing/selftests/kvm/lib/x86_64/sev.c | 17 +++++++++++++++++ .../selftests/kvm/x86_64/sev_smoke_test.c | 2 +- 4 files changed, 24 insertions(+), 3 deletions(-) diff --git a/tools/testing/selftests/kvm/include/x86_64/sev.h b/tools/testing/selftests/kvm/include/x86_64/sev.h index e7df5d0987f6..faed91435963 100644 --- a/tools/testing/selftests/kvm/include/x86_64/sev.h +++ b/tools/testing/selftests/kvm/include/x86_64/sev.h @@ -29,6 +29,10 @@ enum sev_guest_state { #define VMGEXIT() { __asm__ __volatile__("rep; vmmcall"); } +bool is_sev_vm(struct kvm_vm *vm); +bool is_sev_es_vm(struct kvm_vm *vm); +bool is_sev_snp_vm(struct kvm_vm *vm); + void sev_vm_launch(struct kvm_vm *vm, uint32_t policy); void sev_vm_launch_measure(struct kvm_vm *vm, uint8_t *measurement); void sev_vm_launch_finish(struct kvm_vm *vm); diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c index 636b29ba8985..13f060748fc2 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/processor.c +++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c @@ -641,7 +641,7 @@ void kvm_arch_vm_post_create(struct kvm_vm *vm) sync_global_to_guest(vm, host_cpu_is_amd); sync_global_to_guest(vm, is_forced_emulation_enabled); - if (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_VM) { + if (is_sev_vm(vm)) { struct kvm_sev_init init = { 0 }; vm_sev_ioctl(vm, KVM_SEV_INIT2, &init); @@ -1158,7 +1158,7 @@ void kvm_get_cpu_address_width(unsigned int *pa_bits, unsigned int *va_bits) void kvm_init_vm_address_properties(struct kvm_vm *vm) { - if (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_VM) { + if (is_sev_vm(vm)) { vm->arch.sev_fd = open_sev_dev_path_or_exit(); vm->arch.c_bit = BIT_ULL(this_cpu_property(X86_PROPERTY_SEV_C_BIT)); vm->gpa_tag_mask = vm->arch.c_bit; diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c index e9535ee20b7f..d6e7a422b69d 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c @@ -4,6 +4,23 @@ #include "sev.h" +bool is_sev_snp_vm(struct kvm_vm *vm) +{ + return vm->type == KVM_X86_SNP_VM; +} + +/* A SNP VM is also a SEV-ES VM */ +bool is_sev_es_vm(struct kvm_vm *vm) +{ + return is_sev_snp_vm(vm) || vm->type == KVM_X86_SEV_ES_VM; +} + +/* A SEV-ES and SNP VM is also a SEV VM */ +bool is_sev_vm(struct kvm_vm *vm) +{ + return is_sev_snp_vm(vm) || is_sev_es_vm(vm) || vm->type == KVM_X86_SEV_VM; +} + /* * sparsebit_next_clear() can return 0 if [x, 2**64-1] are all set, and the * -1 would then cause an underflow back to 2**64 - 1. This is expected and diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c index 97d9989c8011..53bc0af62bad 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c @@ -123,7 +123,7 @@ static void test_sev(void *guest_code, uint64_t policy) for (;;) { vcpu_run(vcpu); - if (policy & SEV_POLICY_ES) { + if (is_sev_es_vm(vm)) { TEST_ASSERT(vcpu->run->exit_reason == KVM_EXIT_SYSTEM_EVENT, "Wanted SYSTEM_EVENT, got %s", exit_reason_str(vcpu->run->exit_reason)); From patchwork Thu Nov 14 23:41:01 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Signed-off-by: Pratik R. Sampat --- .../selftests/kvm/include/x86_64/sev.h | 49 ++++++++++- tools/testing/selftests/kvm/lib/x86_64/sev.c | 81 ++++++++++++++++++- 2 files changed, 125 insertions(+), 5 deletions(-) diff --git a/tools/testing/selftests/kvm/include/x86_64/sev.h b/tools/testing/selftests/kvm/include/x86_64/sev.h index faed91435963..19454b0e10a6 100644 --- a/tools/testing/selftests/kvm/include/x86_64/sev.h +++ b/tools/testing/selftests/kvm/include/x86_64/sev.h @@ -22,9 +22,20 @@ enum sev_guest_state { SEV_GUEST_STATE_RUNNING, }; +/* Minimum firmware version required for the SEV-SNP support */ +#define SNP_MIN_API_MAJOR 1 +#define SNP_MIN_API_MINOR 51 + #define SEV_POLICY_NO_DBG (1UL << 0) #define SEV_POLICY_ES (1UL << 2) +#define SNP_POLICY_SMT (1ULL << 16) +#define SNP_POLICY_RSVD_MBO (1ULL << 17) +#define SNP_POLICY_DBG (1ULL << 19) + +#define SNP_FW_VER_MINOR(min) ((uint8_t)(min) << 0) +#define SNP_FW_VER_MAJOR(maj) ((uint8_t)(maj) << 8) + #define GHCB_MSR_TERM_REQ 0x100 #define VMGEXIT() { __asm__ __volatile__("rep; vmmcall"); } @@ -36,13 +47,35 @@ bool is_sev_snp_vm(struct kvm_vm *vm); void sev_vm_launch(struct kvm_vm *vm, uint32_t policy); void sev_vm_launch_measure(struct kvm_vm *vm, uint8_t *measurement); void sev_vm_launch_finish(struct kvm_vm *vm); +void snp_vm_launch_start(struct kvm_vm *vm, uint64_t policy); +void snp_vm_launch_update(struct kvm_vm *vm); +void snp_vm_launch_finish(struct kvm_vm *vm); struct kvm_vm *vm_sev_create_with_one_vcpu(uint32_t type, void *guest_code, struct kvm_vcpu **cpu); -void vm_sev_launch(struct kvm_vm *vm, uint32_t policy, uint8_t *measurement); +void vm_sev_launch(struct kvm_vm *vm, uint64_t policy, uint8_t *measurement); kvm_static_assert(SEV_RET_SUCCESS == 0); +/* + * A SEV-SNP VM requires the policy default bit to always be set. + * The SMT policy bit is also required to be set based on SMT being + * available and active on the system. + */ +static inline u64 snp_default_policy(void) +{ + bool smt_active = false; + FILE *f; + + f = fopen("/sys/devices/system/cpu/smt/active", "r"); + if (f) { + smt_active = fgetc(f) - '0'; + fclose(f); + } + + return SNP_POLICY_RSVD_MBO | (smt_active ? SNP_POLICY_SMT : 0); +} + /* * The KVM_MEMORY_ENCRYPT_OP uAPI is utter garbage and takes an "unsigned long" * instead of a proper struct. The size of the parameter is embedded in the @@ -76,6 +109,7 @@ kvm_static_assert(SEV_RET_SUCCESS == 0); void sev_vm_init(struct kvm_vm *vm); void sev_es_vm_init(struct kvm_vm *vm); +void snp_vm_init(struct kvm_vm *vm); static inline void sev_register_encrypted_memory(struct kvm_vm *vm, struct userspace_mem_region *region) @@ -99,4 +133,17 @@ static inline void sev_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa, vm_sev_ioctl(vm, KVM_SEV_LAUNCH_UPDATE_DATA, &update_data); } +static inline void snp_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa, + uint64_t hva, uint64_t size, uint8_t type) +{ + struct kvm_sev_snp_launch_update update_data = { + .uaddr = hva, + .gfn_start = gpa >> PAGE_SHIFT, + .len = size, + .type = type, + }; + + vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_UPDATE, &update_data); +} + #endif /* SELFTEST_KVM_SEV_H */ diff --git a/tools/testing/selftests/kvm/lib/x86_64/sev.c b/tools/testing/selftests/kvm/lib/x86_64/sev.c index d6e7a422b69d..40b90d3a5769 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/sev.c +++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c @@ -31,7 +31,8 @@ bool is_sev_vm(struct kvm_vm *vm) * and find the first range, but that's correct because the condition * expression would cause us to quit the loop. */ -static void encrypt_region(struct kvm_vm *vm, struct userspace_mem_region *region) +static void encrypt_region(struct kvm_vm *vm, struct userspace_mem_region *region, + uint8_t page_type) { const struct sparsebit *protected_phy_pages = region->protected_phy_pages; const vm_paddr_t gpa_base = region->region.guest_phys_addr; @@ -41,16 +42,39 @@ static void encrypt_region(struct kvm_vm *vm, struct userspace_mem_region *regio if (!sparsebit_any_set(protected_phy_pages)) return; - sev_register_encrypted_memory(vm, region); + if (!is_sev_snp_vm(vm)) + sev_register_encrypted_memory(vm, region); sparsebit_for_each_set_range(protected_phy_pages, i, j) { const uint64_t size = (j - i + 1) * vm->page_size; const uint64_t offset = (i - lowest_page_in_region) * vm->page_size; + if (is_sev_snp_vm(vm)) { + snp_launch_update_data(vm, gpa_base + offset, + (uint64_t)addr_gpa2hva(vm, gpa_base + offset), + size, page_type); + continue; + } + sev_launch_update_data(vm, gpa_base + offset, size); } } +static void privatize_region(struct kvm_vm *vm, struct userspace_mem_region *region) +{ + const struct sparsebit *protected_phy_pages = region->protected_phy_pages; + const vm_paddr_t gpa_base = region->region.guest_phys_addr; + const sparsebit_idx_t lowest_page_in_region = gpa_base >> vm->page_shift; + sparsebit_idx_t i, j; + + sparsebit_for_each_set_range(protected_phy_pages, i, j) { + const uint64_t size = (j - i + 1) * vm->page_size; + const uint64_t offset = (i - lowest_page_in_region) * vm->page_size; + + vm_mem_set_private(vm, gpa_base + offset, size); + } +} + void sev_vm_init(struct kvm_vm *vm) { if (vm->type == KVM_X86_DEFAULT_VM) { @@ -77,6 +101,14 @@ void sev_es_vm_init(struct kvm_vm *vm) } } +void snp_vm_init(struct kvm_vm *vm) +{ + struct kvm_sev_init init = { 0 }; + + assert(vm->type == KVM_X86_SNP_VM); + vm_sev_ioctl(vm, KVM_SEV_INIT2, &init); +} + void sev_vm_launch(struct kvm_vm *vm, uint32_t policy) { struct kvm_sev_launch_start launch_start = { @@ -93,7 +125,7 @@ void sev_vm_launch(struct kvm_vm *vm, uint32_t policy) TEST_ASSERT_EQ(status.state, SEV_GUEST_STATE_LAUNCH_UPDATE); hash_for_each(vm->regions.slot_hash, ctr, region, slot_node) - encrypt_region(vm, region); + encrypt_region(vm, region, 0); if (policy & SEV_POLICY_ES) vm_sev_ioctl(vm, KVM_SEV_LAUNCH_UPDATE_VMSA, NULL); @@ -129,6 +161,35 @@ void sev_vm_launch_finish(struct kvm_vm *vm) TEST_ASSERT_EQ(status.state, SEV_GUEST_STATE_RUNNING); } +void snp_vm_launch_start(struct kvm_vm *vm, uint64_t policy) +{ + struct kvm_sev_snp_launch_start launch_start = { + .policy = policy, + }; + + vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_START, &launch_start); +} + +void snp_vm_launch_update(struct kvm_vm *vm) +{ + struct userspace_mem_region *region; + int ctr; + + hash_for_each(vm->regions.slot_hash, ctr, region, slot_node) { + privatize_region(vm, region); + encrypt_region(vm, region, KVM_SEV_SNP_PAGE_TYPE_NORMAL); + } + + vm->arch.is_pt_protected = true; +} + +void snp_vm_launch_finish(struct kvm_vm *vm) +{ + struct kvm_sev_snp_launch_finish launch_finish = { 0 }; + + vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_FINISH, &launch_finish); +} + struct kvm_vm *vm_sev_create_with_one_vcpu(uint32_t type, void *guest_code, struct kvm_vcpu **cpu) { @@ -145,8 +206,20 @@ struct kvm_vm *vm_sev_create_with_one_vcpu(uint32_t type, void *guest_code, return vm; } -void vm_sev_launch(struct kvm_vm *vm, uint32_t policy, uint8_t *measurement) +void vm_sev_launch(struct kvm_vm *vm, uint64_t policy, uint8_t *measurement) { + if (is_sev_snp_vm(vm)) { + vm_enable_cap(vm, KVM_CAP_EXIT_HYPERCALL, (1 << KVM_HC_MAP_GPA_RANGE)); + + snp_vm_launch_start(vm, policy); + + snp_vm_launch_update(vm); + + snp_vm_launch_finish(vm); + + return; + } + sev_vm_launch(vm, policy); if (!measurement) From patchwork Thu Nov 14 23:41:02 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Signed-off-by: Pratik R. Sampat --- tools/testing/selftests/kvm/lib/kvm_util.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c index 480e3a40d197..26179fb2f0e7 100644 --- a/tools/testing/selftests/kvm/lib/kvm_util.c +++ b/tools/testing/selftests/kvm/lib/kvm_util.c @@ -413,14 +413,17 @@ struct kvm_vm *__vm_create(struct vm_shape shape, uint32_t nr_runnable_vcpus, nr_extra_pages); struct userspace_mem_region *slot0; struct kvm_vm *vm; - int i; + int i, flags = 0; pr_debug("%s: mode='%s' type='%d', pages='%ld'\n", __func__, vm_guest_mode_string(shape.mode), shape.type, nr_pages); vm = ____vm_create(shape); - vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, 0); + if (shape.type == KVM_X86_SNP_VM) + flags |= KVM_MEM_GUEST_MEMFD; + + vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, 0, 0, nr_pages, flags); for (i = 0; i < NR_MEM_REGIONS; i++) vm->memslots[i] = 0; From patchwork Thu Nov 14 23:41:03 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Introduce, wrappers for SEV and SEV-ES types to abstract the parametrized launch tests calls and reduce verbosity. No functional change intended. Signed-off-by: Pratik R. Sampat --- .../selftests/kvm/x86_64/sev_smoke_test.c | 50 ++++++++++++------- 1 file changed, 33 insertions(+), 17 deletions(-) diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c index 53bc0af62bad..af1beabbbf8e 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c @@ -61,7 +61,7 @@ static void compare_xsave(u8 *from_host, u8 *from_guest) abort(); } -static void test_sync_vmsa(uint32_t policy) +static void __test_sync_vmsa(uint32_t type, uint64_t policy) { struct kvm_vcpu *vcpu; struct kvm_vm *vm; @@ -71,7 +71,7 @@ static void test_sync_vmsa(uint32_t policy) double x87val = M_PI; struct kvm_xsave __attribute__((aligned(64))) xsave = { 0 }; - vm = vm_sev_create_with_one_vcpu(KVM_X86_SEV_ES_VM, guest_code_xsave, &vcpu); + vm = vm_sev_create_with_one_vcpu(type, guest_code_xsave, &vcpu); gva = vm_vaddr_alloc_shared(vm, PAGE_SIZE, KVM_UTIL_MIN_VADDR, MEM_REGION_TEST_DATA); hva = addr_gva2hva(vm, gva); @@ -88,7 +88,7 @@ static void test_sync_vmsa(uint32_t policy) : "ymm4", "st", "st(1)", "st(2)", "st(3)", "st(4)", "st(5)", "st(6)", "st(7)"); vcpu_xsave_set(vcpu, &xsave); - vm_sev_launch(vm, SEV_POLICY_ES | policy, NULL); + vm_sev_launch(vm, policy, NULL); /* This page is shared, so make it decrypted. */ memset(hva, 0, 4096); @@ -107,14 +107,12 @@ static void test_sync_vmsa(uint32_t policy) kvm_vm_free(vm); } -static void test_sev(void *guest_code, uint64_t policy) +static void __test_sev(void *guest_code, uint32_t type, uint64_t policy) { struct kvm_vcpu *vcpu; struct kvm_vm *vm; struct ucall uc; - uint32_t type = policy & SEV_POLICY_ES ? KVM_X86_SEV_ES_VM : KVM_X86_SEV_VM; - vm = vm_sev_create_with_one_vcpu(type, guest_code, &vcpu); /* TODO: Validate the measurement is as expected. */ @@ -149,6 +147,21 @@ static void test_sev(void *guest_code, uint64_t policy) kvm_vm_free(vm); } +static void test_sev(uint64_t policy) +{ + __test_sev(guest_sev_code, KVM_X86_SEV_VM, policy); +} + +static void test_sev_es(uint64_t policy) +{ + __test_sev(guest_sev_es_code, KVM_X86_SEV_ES_VM, policy); +} + +static void test_sync_vmsa_sev_es(uint64_t policy) +{ + __test_sync_vmsa(KVM_X86_SEV_ES_VM, policy); +} + static void guest_shutdown_code(void) { struct desc_ptr idt; @@ -160,16 +173,14 @@ static void guest_shutdown_code(void) __asm__ __volatile__("ud2"); } -static void test_sev_es_shutdown(void) +static void __test_sev_shutdown(uint32_t type, uint64_t policy) { struct kvm_vcpu *vcpu; struct kvm_vm *vm; - uint32_t type = KVM_X86_SEV_ES_VM; - vm = vm_sev_create_with_one_vcpu(type, guest_shutdown_code, &vcpu); - vm_sev_launch(vm, SEV_POLICY_ES, NULL); + vm_sev_launch(vm, policy, NULL); vcpu_run(vcpu); TEST_ASSERT(vcpu->run->exit_reason == KVM_EXIT_SHUTDOWN, @@ -179,25 +190,30 @@ static void test_sev_es_shutdown(void) kvm_vm_free(vm); } +static void test_sev_es_shutdown(uint64_t policy) +{ + __test_sev_shutdown(KVM_X86_SEV_ES_VM, SEV_POLICY_ES); +} + int main(int argc, char *argv[]) { const u64 xf_mask = XFEATURE_MASK_X87_AVX; TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_SEV)); - test_sev(guest_sev_code, SEV_POLICY_NO_DBG); - test_sev(guest_sev_code, 0); + test_sev(SEV_POLICY_NO_DBG); + test_sev(0); if (kvm_cpu_has(X86_FEATURE_SEV_ES)) { - test_sev(guest_sev_es_code, SEV_POLICY_ES | SEV_POLICY_NO_DBG); - test_sev(guest_sev_es_code, SEV_POLICY_ES); + test_sev_es(SEV_POLICY_ES | SEV_POLICY_NO_DBG); + test_sev_es(SEV_POLICY_ES); - test_sev_es_shutdown(); + test_sev_es_shutdown(SEV_POLICY_ES); if (kvm_has_cap(KVM_CAP_XCRS) && (xgetbv(0) & kvm_cpu_supported_xcr0() & xf_mask) == xf_mask) { - test_sync_vmsa(0); - test_sync_vmsa(SEV_POLICY_NO_DBG); + test_sync_vmsa_sev_es(SEV_POLICY_ES); + test_sync_vmsa_sev_es(SEV_POLICY_NO_DBG | SEV_POLICY_ES); } } From patchwork Thu Nov 14 23:41:04 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Pratik R. 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Sampat" To: CC: , , , , , , , , , Subject: [PATCH v4 8/8] KVM: selftests: Add a basic SEV-SNP smoke test Date: Thu, 14 Nov 2024 17:41:04 -0600 Message-ID: <20241114234104.128532-9-pratikrajesh.sampat@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> References: <20241114234104.128532-1-pratikrajesh.sampat@amd.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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: CO1PEPF000044EE:EE_|PH7PR12MB7163:EE_ X-MS-Office365-Filtering-Correlation-Id: 9f74f144-34c1-4a09-861e-08dd05060cd0 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700013|376014|82310400026|1800799024; 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:(13230040)(36860700013)(376014)(82310400026)(1800799024);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 14 Nov 2024 23:42:49.7850 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 9f74f144-34c1-4a09-861e-08dd05060cd0 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: CO1PEPF000044EE.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7163 Extend sev_smoke_test to also run a minimal SEV-SNP smoke test that initializes and sets up private memory regions required to run a simple SEV-SNP guest. Similar to its SEV-ES smoke test counterpart, this also does not support GHCB and ucall yet and uses the GHCB MSR protocol to trigger an exit of the type KVM_EXIT_SYSTEM_EVENT. Signed-off-by: Pratik R. Sampat --- .../selftests/kvm/x86_64/sev_smoke_test.c | 42 +++++++++++++++++++ 1 file changed, 42 insertions(+) diff --git a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c index af1beabbbf8e..ff508d67377d 100644 --- a/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c +++ b/tools/testing/selftests/kvm/x86_64/sev_smoke_test.c @@ -16,6 +16,18 @@ #define XFEATURE_MASK_X87_AVX (XFEATURE_MASK_FP | XFEATURE_MASK_SSE | XFEATURE_MASK_YMM) +static void guest_snp_code(void) +{ + uint64_t sev_msr = rdmsr(MSR_AMD64_SEV); + + GUEST_ASSERT(sev_msr & MSR_AMD64_SEV_ENABLED); + GUEST_ASSERT(sev_msr & MSR_AMD64_SEV_ES_ENABLED); + GUEST_ASSERT(sev_msr & MSR_AMD64_SEV_SNP_ENABLED); + + wrmsr(MSR_AMD64_SEV_ES_GHCB, GHCB_MSR_TERM_REQ); + VMGEXIT(); +} + static void guest_sev_es_code(void) { /* TODO: Check CPUID after GHCB-based hypercall support is added. */ @@ -157,11 +169,21 @@ static void test_sev_es(uint64_t policy) __test_sev(guest_sev_es_code, KVM_X86_SEV_ES_VM, policy); } +static void test_snp(uint64_t policy) +{ + __test_sev(guest_snp_code, KVM_X86_SNP_VM, policy); +} + static void test_sync_vmsa_sev_es(uint64_t policy) { __test_sync_vmsa(KVM_X86_SEV_ES_VM, policy); } +static void test_sync_vmsa_snp(uint64_t policy) +{ + __test_sync_vmsa(KVM_X86_SNP_VM, policy); +} + static void guest_shutdown_code(void) { struct desc_ptr idt; @@ -195,6 +217,11 @@ static void test_sev_es_shutdown(uint64_t policy) __test_sev_shutdown(KVM_X86_SEV_ES_VM, SEV_POLICY_ES); } +static void test_snp_shutdown(uint64_t policy) +{ + __test_sev_shutdown(KVM_X86_SNP_VM, policy); +} + int main(int argc, char *argv[]) { const u64 xf_mask = XFEATURE_MASK_X87_AVX; @@ -217,5 +244,20 @@ int main(int argc, char *argv[]) } } + if (kvm_cpu_has(X86_FEATURE_SNP)) { + uint64_t snp_policy = snp_default_policy(); + + test_snp(snp_policy); + /* Test minimum firmware level */ + test_snp(snp_policy | SNP_FW_VER_MAJOR(SNP_MIN_API_MAJOR) | + SNP_FW_VER_MINOR(SNP_MIN_API_MINOR)); + + test_snp_shutdown(snp_policy); + + if (kvm_has_cap(KVM_CAP_XCRS) && + (xgetbv(0) & kvm_cpu_supported_xcr0() & xf_mask) == xf_mask) + test_sync_vmsa_snp(snp_policy); + } + return 0; }