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

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

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/kvm/x86/hyperv_evmcs.c
Extension
.c
Size
8822 bytes
Lines
308
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

switch (get_ucall(vcpu, &uc)) {
		case UCALL_ABORT:
			REPORT_GUEST_ASSERT(uc);
			/* NOT REACHED */
		case UCALL_SYNC:
			break;
		case UCALL_DONE:
			goto done;
		default:
			TEST_FAIL("Unknown ucall %lu", uc.cmd);
		}

		/* UCALL_SYNC is handled here.  */
		TEST_ASSERT(!strcmp((const char *)uc.args[0], "hello") &&
			    uc.args[1] == stage, "Stage %d: Unexpected register values vmexit, got %lx",
			    stage, (ulong)uc.args[1]);

		vcpu = save_restore_vm(vm, vcpu);

		/* Force immediate L2->L1 exit before resuming */
		if (stage == 8) {
			pr_info("Injecting NMI into L1 before L2 had a chance to run after restore\n");
			inject_nmi(vcpu);
		}

		/*
		 * Do KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE for a freshly
		 * restored VM (before the first KVM_RUN) to check that
		 * KVM_STATE_NESTED_EVMCS is not lost.
		 */
		if (stage == 9) {
			pr_info("Trying extra KVM_GET_NESTED_STATE/KVM_SET_NESTED_STATE cycle\n");
			vcpu = save_restore_vm(vm, vcpu);
		}
	}

done:
	kvm_vm_free(vm);
}

Annotation

Implementation Notes