tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c

Source file repositories/reference/linux-study-clean/tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/drivers/s390x/uvdevice/test_uvdevice.c
Extension
.c
Size
7125 bytes
Lines
271
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

struct test_attest_buffer {
	uint8_t arcb[0x180];
	uint8_t meas[64];
	uint8_t add[32];
};

FIXTURE(attest_fixture) {
	int uv_fd;
	struct uvio_ioctl_cb uvio_ioctl;
	struct uvio_attest uvio_attest;
	struct test_attest_buffer attest_buffer;
	__u64 fault_page;
};

FIXTURE_SETUP(attest_fixture)
{
	self->uv_fd = open(UV_PATH, O_ACCMODE);

	self->uvio_ioctl.argument_addr = (__u64)&self->uvio_attest;
	self->uvio_ioctl.argument_len = sizeof(self->uvio_attest);

	self->uvio_attest.arcb_addr = (__u64)&self->attest_buffer.arcb;
	self->uvio_attest.arcb_len = sizeof(self->attest_buffer.arcb);

	self->uvio_attest.meas_addr = (__u64)&self->attest_buffer.meas;
	self->uvio_attest.meas_len = sizeof(self->attest_buffer.meas);

	self->uvio_attest.add_data_addr = (__u64)&self->attest_buffer.add;
	self->uvio_attest.add_data_len = sizeof(self->attest_buffer.add);
	self->fault_page =
		(__u64)mmap(NULL, (size_t)getpagesize(), PROT_NONE, MAP_ANONYMOUS, -1, 0);
}

FIXTURE_TEARDOWN(attest_fixture)
{
	if (self->uv_fd)
		close(self->uv_fd);
	munmap((void *)self->fault_page, (size_t)getpagesize());
}

static void att_inval_sizes_test(uint32_t *size, uint32_t max_size, bool test_zero,
				 struct __test_metadata *_metadata,
				 FIXTURE_DATA(attest_fixture) *self)
{
	int rc, errno_cache;
	uint32_t tmp = *size;

	if (test_zero) {
		*size = 0;
		rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl);
		errno_cache = errno;
		ASSERT_EQ(rc, -1);
		ASSERT_EQ(errno_cache, EINVAL);
	}
	*size = max_size + 1;
	rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl);
	errno_cache = errno;
	ASSERT_EQ(rc, -1);
	ASSERT_EQ(errno_cache, EINVAL);
	*size = tmp;
}

/*
 * Test to verify that attestation IOCTLs with invalid values in the UVIO
 * attestation control block are rejected.
 */
TEST_F(attest_fixture, att_inval_request)
{
	int rc, errno_cache;

	att_inval_sizes_test(&self->uvio_attest.add_data_len, UVIO_ATT_ADDITIONAL_MAX_LEN,
			     false, _metadata, self);
	att_inval_sizes_test(&self->uvio_attest.meas_len, UVIO_ATT_MEASUREMENT_MAX_LEN,
			     true, _metadata, self);
	att_inval_sizes_test(&self->uvio_attest.arcb_len, UVIO_ATT_ARCB_MAX_LEN,
			     true, _metadata, self);

	self->uvio_attest.reserved136 = (uint16_t)-1;
	rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl);
	errno_cache = errno;
	ASSERT_EQ(rc, -1);
	ASSERT_EQ(errno_cache, EINVAL);

	memset(&self->uvio_attest, 0x11, sizeof(self->uvio_attest));
	rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl);
	ASSERT_EQ(rc, -1);
}

static void att_inval_addr_test(__u64 *addr, struct __test_metadata *_metadata,
				FIXTURE_DATA(attest_fixture) *self)

Annotation

Implementation Notes