tools/testing/selftests/kvm/arm64/no-vgic.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/kvm/arm64/no-vgic.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/kvm/arm64/no-vgic.c
Extension
.c
Size
7385 bytes
Lines
299
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);
			break;
		case UCALL_PRINTF:
			printf("%s", uc.buffer);
			break;
		case UCALL_DONE:
			break;
		default:
			TEST_FAIL("Unknown ucall %lu", uc.cmd);
		}
	} while (uc.cmd != UCALL_DONE);
}

static void test_guest_no_vgic(void *guest_code)
{
	struct kvm_vcpu *vcpu;
	struct kvm_vm *vm;

	/* Create a VM without a GIC */
	vm = vm_create_with_one_vcpu(&vcpu, guest_code);

	vm_init_descriptor_tables(vm);
	vcpu_init_descriptor_tables(vcpu);

	vm_install_sync_handler(vm, VECTOR_SYNC_CURRENT,
				ESR_ELx_EC_UNKNOWN, guest_undef_handler);

	test_run_vcpu(vcpu);

	kvm_vm_free(vm);
}

int main(int argc, char *argv[])
{
	struct kvm_vcpu *vcpu;
	struct kvm_vm *vm;
	bool has_v3, has_v5;
	u64 pfr;

	test_disable_default_vgic();

	vm = vm_create_with_one_vcpu(&vcpu, NULL);

	pfr = vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_ID_AA64PFR0_EL1));
	has_v3 = !!FIELD_GET(ID_AA64PFR0_EL1_GIC, pfr);

	pfr = vcpu_get_reg(vcpu, KVM_ARM64_SYS_REG(SYS_ID_AA64PFR2_EL1));
	has_v5 = !!FIELD_GET(ID_AA64PFR2_EL1_GCIE, pfr);

	kvm_vm_free(vm);

	__TEST_REQUIRE(has_v3 || has_v5,
		       "Neither GICv3 nor GICv5 supported.");

	if (has_v3) {
		pr_info("Testing no-vgic-v3\n");
		test_guest_no_vgic(guest_code_gicv3);
	} else {
		pr_info("No GICv3 support: skipping no-vgic-v3 test\n");
	}

	if (has_v5) {
		pr_info("Testing no-vgic-v5\n");
		test_guest_no_vgic(guest_code_gicv5);
	} else {
		pr_info("No GICv5 support: skipping no-vgic-v5 test\n");
	}

	return 0;
}

Annotation

Implementation Notes