KVM: selftests: Replace assert() with TEST_ASSERT_EQ()

For SEV tests, assert() failures on VM type or fd do not provide
sufficient error reporting. Replace assert() with TEST_ASSERT_EQ() to
obtain more detailed information on the assertion condition failure,
including the call stack.

Signed-off-by: Pratik R. Sampat <prsampat@amd.com>
Link: https://lore.kernel.org/r/20250305230000.231025-6-prsampat@amd.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: pratiksampat

tools/testing/selftests/kvm/lib/x86/sev.c

@@ -37,25 +37,25 @@ static void encrypt_region(struct kvm_vm *vm, struct userspace_mem_region *regio
 void sev_vm_init(struct kvm_vm *vm)
 {
 	if (vm->type == KVM_X86_DEFAULT_VM) {
-		assert(vm->arch.sev_fd == -1);
+		TEST_ASSERT_EQ(vm->arch.sev_fd, -1);
 		vm->arch.sev_fd = open_sev_dev_path_or_exit();
 		vm_sev_ioctl(vm, KVM_SEV_INIT, NULL);
 	} else {
 		struct kvm_sev_init init = { 0 };
-		assert(vm->type == KVM_X86_SEV_VM);
+		TEST_ASSERT_EQ(vm->type, KVM_X86_SEV_VM);
 		vm_sev_ioctl(vm, KVM_SEV_INIT2, &init);
 	}
 }
 
 void sev_es_vm_init(struct kvm_vm *vm)
 {
 	if (vm->type == KVM_X86_DEFAULT_VM) {
-		assert(vm->arch.sev_fd == -1);
+		TEST_ASSERT_EQ(vm->arch.sev_fd, -1);
 		vm->arch.sev_fd = open_sev_dev_path_or_exit();
 		vm_sev_ioctl(vm, KVM_SEV_ES_INIT, NULL);
 	} else {
 		struct kvm_sev_init init = { 0 };
-		assert(vm->type == KVM_X86_SEV_ES_VM);
+		TEST_ASSERT_EQ(vm->type, KVM_X86_SEV_ES_VM);
 		vm_sev_ioctl(vm, KVM_SEV_INIT2, &init);
 	}
 }