KVM: selftests: Use kvm_cpu_has() for nested VMX checks

Use kvm_cpu_has() to check for nested VMX support, and drop the helpers
now that their functionality is trivial to implement.

No functional change intended.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220614200707.3315957-7-seanjc@google.com

tools/testing/selftests/kvm/include/x86_64/vmx.h

@@ -607,8 +607,6 @@ bool prepare_for_vmx_operation(struct vmx_pages *vmx);
 void prepare_vmcs(struct vmx_pages *vmx, void *guest_rip, void *guest_rsp);
 bool load_vmcs(struct vmx_pages *vmx);
 
-bool nested_vmx_supported(void);
-void nested_vmx_check_supported(void);
 bool ept_1g_pages_supported(void);
 
 void nested_pg_map(struct vmx_pages *vmx, struct kvm_vm *vm,

tools/testing/selftests/kvm/lib/x86_64/perf_test_util.c

@@ -84,7 +84,7 @@ void perf_test_setup_nested(struct kvm_vm *vm, int nr_vcpus, struct kvm_vcpu *vc
 	vm_vaddr_t vmx_gva;
 	int vcpu_id;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	for (vcpu_id = 0; vcpu_id < nr_vcpus; vcpu_id++) {
 		vmx = vcpu_alloc_vmx(vm, &vmx_gva);

tools/testing/selftests/kvm/lib/x86_64/vmx.c

@@ -382,18 +382,6 @@ void prepare_vmcs(struct vmx_pages *vmx, void *guest_rip, void *guest_rsp)
 	init_vmcs_guest_state(guest_rip, guest_rsp);
 }
 
-bool nested_vmx_supported(void)
-{
-	struct kvm_cpuid_entry2 *entry = kvm_get_supported_cpuid_entry(1);
-
-	return entry->ecx & CPUID_VMX;
-}
-
-void nested_vmx_check_supported(void)
-{
-	TEST_REQUIRE(nested_vmx_supported());
-}
-
 static void nested_create_pte(struct kvm_vm *vm,
 			      struct eptPageTableEntry *pte,
 			      uint64_t nested_paddr,

tools/testing/selftests/kvm/x86_64/evmcs_test.c

@@ -208,7 +208,7 @@ int main(int argc, char *argv[])
 
 	vm = vm_create_with_one_vcpu(&vcpu, guest_code);
 
-	TEST_REQUIRE(nested_vmx_supported());
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 	TEST_REQUIRE(kvm_has_cap(KVM_CAP_NESTED_STATE));
 	TEST_REQUIRE(kvm_has_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS));
 

tools/testing/selftests/kvm/x86_64/hyperv_cpuid.c

@@ -148,7 +148,7 @@ int main(int argc, char *argv[])
 	test_hv_cpuid(hv_cpuid_entries, false);
 	free(hv_cpuid_entries);
 
-	if (!nested_vmx_supported() ||
+	if (!kvm_cpu_has(X86_FEATURE_VMX) ||
 	    !kvm_has_cap(KVM_CAP_HYPERV_ENLIGHTENED_VMCS)) {
 		print_skip("Enlightened VMCS is unsupported");
 		goto do_sys;
@@ -168,7 +168,7 @@ int main(int argc, char *argv[])
 	test_hv_cpuid_e2big(vm, NULL);
 
 	hv_cpuid_entries = kvm_get_supported_hv_cpuid();
-	test_hv_cpuid(hv_cpuid_entries, nested_vmx_supported());
+	test_hv_cpuid(hv_cpuid_entries, kvm_cpu_has(X86_FEATURE_VMX));
 
 out:
 	kvm_vm_free(vm);

tools/testing/selftests/kvm/x86_64/smm_test.c

@@ -156,7 +156,7 @@ int main(int argc, char *argv[])
 	if (kvm_has_cap(KVM_CAP_NESTED_STATE)) {
 		if (kvm_cpu_has(X86_FEATURE_SVM))
 			vcpu_alloc_svm(vm, &nested_gva);
-		else if (nested_vmx_supported())
+		else if (kvm_cpu_has(X86_FEATURE_VMX))
 			vcpu_alloc_vmx(vm, &nested_gva);
 	}
 

tools/testing/selftests/kvm/x86_64/state_test.c

@@ -172,7 +172,7 @@ int main(int argc, char *argv[])
 	if (kvm_has_cap(KVM_CAP_NESTED_STATE)) {
 		if (kvm_cpu_has(X86_FEATURE_SVM))
 			vcpu_alloc_svm(vm, &nested_gva);
-		else if (nested_vmx_supported())
+		else if (kvm_cpu_has(X86_FEATURE_VMX))
 			vcpu_alloc_vmx(vm, &nested_gva);
 	}
 

tools/testing/selftests/kvm/x86_64/triple_fault_event_test.c

@@ -46,7 +46,7 @@ int main(void)
 	vm_vaddr_t vmx_pages_gva;
 	struct ucall uc;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	TEST_REQUIRE(kvm_has_cap(KVM_CAP_X86_TRIPLE_FAULT_EVENT));
 

tools/testing/selftests/kvm/x86_64/vmx_apic_access_test.c

@@ -80,7 +80,7 @@ int main(int argc, char *argv[])
 	struct kvm_vcpu *vcpu;
 	struct kvm_vm *vm;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
 

tools/testing/selftests/kvm/x86_64/vmx_close_while_nested_test.c

@@ -51,7 +51,7 @@ int main(int argc, char *argv[])
 	struct kvm_vcpu *vcpu;
 	struct kvm_vm *vm;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
 

tools/testing/selftests/kvm/x86_64/vmx_dirty_log_test.c

@@ -77,7 +77,7 @@ int main(int argc, char *argv[])
 	struct ucall uc;
 	bool done = false;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	/* Create VM */
 	vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);

tools/testing/selftests/kvm/x86_64/vmx_invalid_nested_guest_state.c

@@ -58,7 +58,7 @@ int main(int argc, char *argv[])
 	struct kvm_run *run;
 	struct ucall uc;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	vm = vm_create_with_one_vcpu(&vcpu, l1_guest_code);
 

tools/testing/selftests/kvm/x86_64/vmx_nested_tsc_scaling_test.c

@@ -150,7 +150,7 @@ int main(int argc, char *argv[])
 	uint64_t l1_tsc_freq = 0;
 	uint64_t l2_tsc_freq = 0;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 	TEST_REQUIRE(kvm_has_cap(KVM_CAP_TSC_CONTROL));
 	stable_tsc_check_supported();
 

tools/testing/selftests/kvm/x86_64/vmx_preemption_timer_test.c

@@ -167,7 +167,7 @@ int main(int argc, char *argv[])
 	 * AMD currently does not implement any VMX features, so for now we
 	 * just early out.
 	 */
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	TEST_REQUIRE(kvm_has_cap(KVM_CAP_NESTED_STATE));
 

tools/testing/selftests/kvm/x86_64/vmx_set_nested_state_test.c

@@ -273,7 +273,7 @@ int main(int argc, char *argv[])
 	 * AMD currently does not implement set_nested_state, so for now we
 	 * just early out.
 	 */
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	vm = vm_create_with_one_vcpu(&vcpu, NULL);
 

tools/testing/selftests/kvm/x86_64/vmx_tsc_adjust_test.c

@@ -127,7 +127,7 @@ int main(int argc, char *argv[])
 	vm_vaddr_t vmx_pages_gva;
 	struct kvm_vcpu *vcpu;
 
-	nested_vmx_check_supported();
+	TEST_REQUIRE(kvm_cpu_has(X86_FEATURE_VMX));
 
 	vm = vm_create_with_one_vcpu(&vcpu, (void *) l1_guest_code);