tools/testing/selftests/kvm/x86/monitor_mwait_test.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/kvm/x86/monitor_mwait_test.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/kvm/x86/monitor_mwait_test.c
Extension
.c
Size
3728 bytes
Lines
137
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

if (testcase & MWAIT_QUIRK_DISABLED) {
			disabled_quirks |= KVM_X86_QUIRK_MWAIT_NEVER_UD_FAULTS;
			strcpy(test, "MWAIT can fault");
		} else {
			strcpy(test, "MWAIT never faults");
		}
		if (testcase & MISC_ENABLES_QUIRK_DISABLED) {
			disabled_quirks |= KVM_X86_QUIRK_MISC_ENABLE_NO_MWAIT;
			strcat(test, ", MISC_ENABLE updates CPUID");
		} else {
			strcat(test, ", no CPUID updates");
		}

		vm_enable_cap(vm, KVM_CAP_DISABLE_QUIRKS2, disabled_quirks);

		if (!(testcase & MISC_ENABLES_QUIRK_DISABLED) &&
		    (!!(testcase & CPUID_DISABLED) ^ !!(testcase & MWAIT_DISABLED)))
			continue;

		if (testcase & CPUID_DISABLED) {
			strcat(test, ", CPUID clear");
			vcpu_clear_cpuid_feature(vcpu, X86_FEATURE_MWAIT);
		} else {
			strcat(test, ", CPUID set");
			vcpu_set_cpuid_feature(vcpu, X86_FEATURE_MWAIT);
		}

		if (testcase & MWAIT_DISABLED)
			strcat(test, ", MWAIT disabled");

		vcpu_run(vcpu);
		TEST_ASSERT_KVM_EXIT_REASON(vcpu, KVM_EXIT_IO);

		switch (get_ucall(vcpu, &uc)) {
		case UCALL_ABORT:
			/* Detected in vcpu_run */
			break;
		case UCALL_DONE:
			ksft_test_result_pass("%s\n", test);
			break;
		default:
			TEST_FAIL("Unknown ucall %lu", uc.cmd);
			break;
		}
		kvm_vm_free(vm);
	}
	ksft_finished();

	return 0;
}

Annotation

Implementation Notes