diff --git a/tools/testing/selftests/kvm/include/x86_64/processor.h b/tools/testing/selftests/kvm/include/x86_64/processor.h
index a0c1440017bb..8acf06cc66cb 100644
--- a/tools/testing/selftests/kvm/include/x86_64/processor.h
+++ b/tools/testing/selftests/kvm/include/x86_64/processor.h
@@ -195,6 +195,7 @@ 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/include/x86_64/sev.h b/tools/testing/selftests/kvm/include/x86_64/sev.h
index 3998152cc081..658c3cca208d 100644
--- a/tools/testing/selftests/kvm/include/x86_64/sev.h
+++ b/tools/testing/selftests/kvm/include/x86_64/sev.h
@@ -22,8 +22,21 @@ enum sev_guest_state {
 	SEV_GUEST_STATE_RUNNING,
 };
 
+/* Minimum firmware version required for the SEV-SNP support */
+#define SNP_FW_REQ_VER_MAJOR	1
+#define SNP_FW_REQ_VER_MINOR	51
+#define SNP_POLICY_MINOR_BIT	0
+#define SNP_POLICY_MAJOR_BIT	8
+
 #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_POLICY		(SNP_POLICY_SMT | SNP_POLICY_RSVD_MBO)
+
+#define SNP_FW_VER_MAJOR(maj)	((uint8_t)(maj) << SNP_POLICY_MAJOR_BIT)
+#define SNP_FW_VER_MINOR(min)	((uint8_t)(min) << SNP_POLICY_MINOR_BIT)
 
 #define GHCB_MSR_TERM_REQ	0x100
 
@@ -32,14 +45,22 @@ int __sev_vm_launch_start(struct kvm_vm *vm, uint32_t policy);
 int __sev_vm_launch_update(struct kvm_vm *vm, uint32_t policy);
 int __sev_vm_launch_measure(struct kvm_vm *vm, uint8_t *measurement);
 int __sev_vm_launch_finish(struct kvm_vm *vm);
+int __snp_vm_launch_start(struct kvm_vm *vm, uint64_t policy, uint8_t flags);
+int __snp_vm_launch_update(struct kvm_vm *vm, uint8_t page_type);
+int __snp_vm_launch_finish(struct kvm_vm *vm, uint16_t flags);
 
 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);
+
+bool is_kvm_snp_supported(void);
 
 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);
 
@@ -74,8 +95,18 @@ kvm_static_assert(SEV_RET_SUCCESS == 0);
 	__TEST_ASSERT_VM_VCPU_IOCTL(!ret, #cmd,	ret, vm);		\
 })
 
+/* Ensure policy is within bounds for SEV, SEV-ES */
+#define ASSERT_SEV_POLICY(type, policy)				\
+({									\
+	if (type == KVM_X86_SEV_VM || type == KVM_X86_SEV_ES_VM) {	\
+		TEST_ASSERT(policy < ((uint32_t)~0U),			\
+			    "Policy beyond bounds for SEV");		\
+	}								\
+})									\
+
 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)
@@ -99,6 +130,19 @@ static inline int __sev_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa,
 	return __vm_sev_ioctl(vm, KVM_SEV_LAUNCH_UPDATE_DATA, &update_data);
 }
 
+static inline int __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,
+	};
+
+	return __vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_UPDATE, &update_data);
+}
+
 static inline void sev_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa,
 					  uint64_t hva, uint64_t size)
 {
@@ -107,4 +151,12 @@ static inline void sev_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa,
 	TEST_ASSERT_VM_VCPU_IOCTL(!ret, KVM_SEV_LAUNCH_UPDATE_DATA, ret, vm);
 }
 
+static inline int snp_launch_update_data(struct kvm_vm *vm, vm_paddr_t gpa,
+					 uint64_t hva, uint64_t size, uint8_t type)
+{
+	int ret = __snp_launch_update_data(vm, gpa, hva, size, type);
+
+	TEST_ASSERT_VM_VCPU_IOCTL(!ret, KVM_SEV_SNP_LAUNCH_UPDATE, ret, vm);
+}
+
 #endif /* SELFTEST_KVM_SEV_H */
diff --git a/tools/testing/selftests/kvm/lib/kvm_util.c b/tools/testing/selftests/kvm/lib/kvm_util.c
index 56b170b725b3..9cc4dfc72329 100644
--- a/tools/testing/selftests/kvm/lib/kvm_util.c
+++ b/tools/testing/selftests/kvm/lib/kvm_util.c
@@ -413,14 +413,18 @@ 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;
 
diff --git a/tools/testing/selftests/kvm/lib/x86_64/processor.c b/tools/testing/selftests/kvm/lib/x86_64/processor.c
index 153739f2e201..670fb09c43d0 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/processor.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/processor.c
@@ -629,7 +629,8 @@ 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 (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_VM ||
+	    vm->type == KVM_X86_SNP_VM) {
 		struct kvm_sev_init init = { 0 };
 
 		vm_sev_ioctl(vm, KVM_SEV_INIT2, &init);
@@ -1138,7 +1139,8 @@ 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 (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_VM ||
+	    vm->type == KVM_X86_SNP_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 290eb0bd495e..75c1463b98d4 100644
--- a/tools/testing/selftests/kvm/lib/x86_64/sev.c
+++ b/tools/testing/selftests/kvm/lib/x86_64/sev.c
@@ -14,7 +14,8 @@
  * and find the first range, but that's correct because the condition
  * expression would cause us to quit the loop.
  */
-static int encrypt_region(struct kvm_vm *vm, struct userspace_mem_region *region)
+static int 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;
@@ -25,12 +26,23 @@ static int encrypt_region(struct kvm_vm *vm, struct userspace_mem_region *region
 	if (!sparsebit_any_set(protected_phy_pages))
 		return 0;
 
-	sev_register_encrypted_memory(vm, region);
+	if (vm->type == KVM_X86_SEV_VM || vm->type == KVM_X86_SEV_ES_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 (vm->type == KVM_X86_SNP_VM) {
+			vm_mem_set_private(vm, gpa_base + offset, size);
+			ret = __snp_launch_update_data(vm, gpa_base + offset,
+						      (uint64_t)addr_gpa2hva(vm, gpa_base + offset),
+						      size, page_type);
+			if (ret)
+				return ret;
+			continue;
+		}
+
 		ret = __sev_launch_update_data(vm, gpa_base + offset,
 					       (uint64_t)addr_gpa2hva(vm, gpa_base + offset),
 					       size);
@@ -68,6 +80,14 @@ 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);
+}
+
 int __sev_vm_launch_start(struct kvm_vm *vm, uint32_t policy)
 {
 	struct kvm_sev_launch_start launch_start = {
@@ -83,7 +103,7 @@ int __sev_vm_launch_update(struct kvm_vm *vm, uint32_t policy)
 	int ctr;
 
 	hash_for_each(vm->regions.slot_hash, ctr, region, slot_node) {
-		int ret = encrypt_region(vm, region);
+		int ret = encrypt_region(vm, region, 0);
 
 		if (ret)
 			return ret;
@@ -112,6 +132,41 @@ int __sev_vm_launch_finish(struct kvm_vm *vm)
 	return __vm_sev_ioctl(vm, KVM_SEV_LAUNCH_FINISH, NULL);
 }
 
+int __snp_vm_launch_start(struct kvm_vm *vm, uint64_t policy, uint8_t flags)
+{
+	struct kvm_sev_snp_launch_start launch_start = {
+		.policy = policy,
+		.flags = flags,
+	};
+
+	return __vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_START, &launch_start);
+}
+
+int __snp_vm_launch_update(struct kvm_vm *vm, uint8_t page_type)
+{
+	struct userspace_mem_region *region;
+	int ctr, ret;
+
+	hash_for_each(vm->regions.slot_hash, ctr, region, slot_node) {
+		ret = encrypt_region(vm, region, page_type);
+		if (ret)
+			return ret;
+	}
+
+	vm->arch.is_pt_protected = true;
+
+	return 0;
+}
+
+int __snp_vm_launch_finish(struct kvm_vm *vm, uint16_t flags)
+{
+	struct kvm_sev_snp_launch_finish launch_finish = {
+		.flags = flags,
+	};
+
+	return __vm_sev_ioctl(vm, KVM_SEV_SNP_LAUNCH_FINISH, &launch_finish);
+}
+
 void sev_vm_launch(struct kvm_vm *vm, uint32_t policy)
 {
 	struct kvm_sev_guest_status status;
@@ -158,6 +213,45 @@ 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)
+{
+	int ret = __snp_vm_launch_start(vm, policy, 0);
+
+	TEST_ASSERT_VM_VCPU_IOCTL(!ret, KVM_SEV_SNP_LAUNCH_START, ret, vm);
+}
+
+void snp_vm_launch_update(struct kvm_vm *vm)
+{
+	int ret = __snp_vm_launch_update(vm, KVM_SEV_SNP_PAGE_TYPE_NORMAL);
+
+	TEST_ASSERT_VM_VCPU_IOCTL(!ret, KVM_SEV_SNP_LAUNCH_UPDATE, ret, vm);
+}
+
+void snp_vm_launch_finish(struct kvm_vm *vm)
+{
+	int ret = __snp_vm_launch_finish(vm, 0);
+
+	TEST_ASSERT_VM_VCPU_IOCTL(!ret, KVM_SEV_SNP_LAUNCH_FINISH, ret, vm);
+}
+
+bool is_kvm_snp_supported(void)
+{
+	int sev_fd = open_sev_dev_path_or_exit();
+	struct sev_user_data_status sev_status;
+
+	struct sev_issue_cmd arg = {
+		.cmd = SEV_PLATFORM_STATUS,
+		.data = (unsigned long)&sev_status,
+	};
+
+	kvm_ioctl(sev_fd, SEV_ISSUE_CMD, &arg);
+	close(sev_fd);
+
+	return sev_status.api_major > SNP_FW_REQ_VER_MAJOR ||
+		(sev_status.api_major == SNP_FW_REQ_VER_MAJOR &&
+		sev_status.api_minor >= SNP_FW_REQ_VER_MINOR);
+}
+
 struct kvm_vm *vm_sev_create_with_one_vcpu(uint32_t type, void *guest_code,
 					   struct kvm_vcpu **cpu)
 {
@@ -174,8 +268,22 @@ 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 (vm->type == KVM_X86_SNP_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;
+	}
+
+	ASSERT_SEV_POLICY(vm->type, policy);
+
 	sev_vm_launch(vm, policy);
 
 	if (!measurement)
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 04f24d5f0987..0b65b59b9b40 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 +16,27 @@
 
 #define XFEATURE_MASK_X87_AVX (XFEATURE_MASK_FP | XFEATURE_MASK_SSE | XFEATURE_MASK_YMM)
 
+static bool is_smt_active(void)
+{
+	FILE *f;
+
+	f = fopen("/sys/devices/system/cpu/smt/active", "r");
+	if (!f)
+		return false;
+
+	return fgetc(f) - '0';
+}
+
+static void guest_snp_code(void)
+{
+	GUEST_ASSERT(rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ENABLED);
+	GUEST_ASSERT(rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_ES_ENABLED);
+	GUEST_ASSERT(rdmsr(MSR_AMD64_SEV) & MSR_AMD64_SEV_SNP_ENABLED);
+
+	wrmsr(MSR_AMD64_SEV_ES_GHCB, GHCB_MSR_TERM_REQ);
+	__asm__ __volatile__("rep; vmmcall");
+}
+
 static void guest_sev_es_code(void)
 {
 	/* TODO: Check CPUID after GHCB-based hypercall support is added. */
@@ -61,7 +82,7 @@ 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;
@@ -77,7 +98,10 @@ static void test_sync_vmsa(uint32_t policy)
 		.xcrs[0].value = XFEATURE_MASK_X87_AVX,
 	};
 
-	vm = vm_sev_create_with_one_vcpu(KVM_X86_SEV_ES_VM, guest_code_xsave, &vcpu);
+	TEST_ASSERT(type != KVM_X86_SEV_VM,
+		    "sync_vmsa only supported for SEV-ES and SNP VM types");
+
+	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);
@@ -99,7 +123,7 @@ 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);
@@ -118,14 +142,12 @@ 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. */
@@ -134,7 +156,7 @@ static void test_sev(void *guest_code, uint64_t policy)
 	for (;;) {
 		vcpu_run(vcpu);
 
-		if (policy & SEV_POLICY_ES) {
+		if (vm->type == KVM_X86_SEV_ES_VM || vm->type == KVM_X86_SNP_VM) {
 			TEST_ASSERT(vcpu->run->exit_reason == KVM_EXIT_SYSTEM_EVENT,
 				    "Wanted SYSTEM_EVENT, got %s",
 				    exit_reason_str(vcpu->run->exit_reason));
@@ -188,19 +210,38 @@ int main(int argc, char *argv[])
 {
 	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(guest_sev_code, KVM_X86_SEV_VM, SEV_POLICY_NO_DBG);
+	test_sev(guest_sev_code, KVM_X86_SEV_VM, 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(guest_sev_es_code, KVM_X86_SEV_ES_VM, SEV_POLICY_ES | SEV_POLICY_NO_DBG);
+		test_sev(guest_sev_es_code, KVM_X86_SEV_ES_VM, SEV_POLICY_ES);
 
 		test_sev_es_shutdown();
 
 		if (kvm_has_cap(KVM_CAP_XCRS) &&
 		    (xgetbv(0) & XFEATURE_MASK_X87_AVX) == XFEATURE_MASK_X87_AVX) {
-			test_sync_vmsa(0);
-			test_sync_vmsa(SEV_POLICY_NO_DBG);
+			test_sync_vmsa(KVM_X86_SEV_ES_VM, SEV_POLICY_ES);
+			test_sync_vmsa(KVM_X86_SEV_ES_VM, SEV_POLICY_ES | SEV_POLICY_NO_DBG);
+		}
+	}
+
+	if (kvm_cpu_has(X86_FEATURE_SNP) && is_kvm_snp_supported()) {
+		unsigned long snp_policy = SNP_POLICY;
+
+		if (unlikely(!is_smt_active()))
+			snp_policy &= ~SNP_POLICY_SMT;
+
+		test_sev(guest_snp_code, KVM_X86_SNP_VM, snp_policy);
+		/* Test minimum firmware level */
+		test_sev(guest_snp_code, KVM_X86_SNP_VM,
+			 snp_policy |
+			 SNP_FW_VER_MAJOR(SNP_FW_REQ_VER_MAJOR) |
+			 SNP_FW_VER_MINOR(SNP_FW_REQ_VER_MINOR));
+
+		if (kvm_has_cap(KVM_CAP_XCRS) &&
+		    (xgetbv(0) & XFEATURE_MASK_X87_AVX) == XFEATURE_MASK_X87_AVX) {
+			test_sync_vmsa(KVM_X86_SNP_VM, snp_policy);
 		}
 	}
 
