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// SPDX-License-Identifier: GPL-2.0
/*
* selftest for the Ultravisor UAPI device
*
* Copyright IBM Corp. 2022
* Author(s): Steffen Eiden <seiden@linux.ibm.com>
*/
#include <stdint.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <asm/uvdevice.h>
#include "../../../kselftest_harness.h"
#define UV_PATH "/dev/uv"
#define BUFFER_SIZE 0x200
FIXTURE(uvio_fixture) {
int uv_fd;
struct uvio_ioctl_cb uvio_ioctl;
uint8_t buffer[BUFFER_SIZE];
__u64 fault_page;
};
FIXTURE_VARIANT(uvio_fixture) {
unsigned long ioctl_cmd;
uint32_t arg_size;
};
FIXTURE_VARIANT_ADD(uvio_fixture, att) {
.ioctl_cmd = UVIO_IOCTL_ATT,
.arg_size = sizeof(struct uvio_attest),
};
FIXTURE_SETUP(uvio_fixture)
{
self->uv_fd = open(UV_PATH, O_ACCMODE);
self->uvio_ioctl.argument_addr = (__u64)self->buffer;
self->uvio_ioctl.argument_len = variant->arg_size;
self->fault_page =
(__u64)mmap(NULL, (size_t)getpagesize(), PROT_NONE, MAP_ANONYMOUS, -1, 0);
}
FIXTURE_TEARDOWN(uvio_fixture)
{
if (self->uv_fd)
close(self->uv_fd);
munmap((void *)self->fault_page, (size_t)getpagesize());
}
TEST_F(uvio_fixture, fault_ioctl_arg)
{
int rc, errno_cache;
rc = ioctl(self->uv_fd, variant->ioctl_cmd, NULL);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EFAULT);
rc = ioctl(self->uv_fd, variant->ioctl_cmd, self->fault_page);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EFAULT);
}
TEST_F(uvio_fixture, fault_uvio_arg)
{
int rc, errno_cache;
self->uvio_ioctl.argument_addr = 0;
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EFAULT);
self->uvio_ioctl.argument_addr = self->fault_page;
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EFAULT);
}
/*
* Test to verify that IOCTLs with invalid values in the ioctl_control block
* are rejected.
*/
TEST_F(uvio_fixture, inval_ioctl_cb)
{
int rc, errno_cache;
self->uvio_ioctl.argument_len = 0;
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EINVAL);
self->uvio_ioctl.argument_len = (uint32_t)-1;
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EINVAL);
self->uvio_ioctl.argument_len = variant->arg_size;
self->uvio_ioctl.flags = (uint32_t)-1;
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EINVAL);
self->uvio_ioctl.flags = 0;
memset(self->uvio_ioctl.reserved14, 0xff, sizeof(self->uvio_ioctl.reserved14));
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EINVAL);
memset(&self->uvio_ioctl, 0x11, sizeof(self->uvio_ioctl));
rc = ioctl(self->uv_fd, variant->ioctl_cmd, &self->uvio_ioctl);
ASSERT_EQ(rc, -1);
}
TEST_F(uvio_fixture, inval_ioctl_cmd)
{
int rc, errno_cache;
uint8_t nr = _IOC_NR(variant->ioctl_cmd);
unsigned long cmds[] = {
_IOWR('a', nr, struct uvio_ioctl_cb),
_IOWR(UVIO_TYPE_UVC, nr, int),
_IO(UVIO_TYPE_UVC, nr),
_IOR(UVIO_TYPE_UVC, nr, struct uvio_ioctl_cb),
_IOW(UVIO_TYPE_UVC, nr, struct uvio_ioctl_cb),
};
for (size_t i = 0; i < ARRAY_SIZE(cmds); i++) {
rc = ioctl(self->uv_fd, cmds[i], &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, ENOTTY);
}
}
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)
{
int rc, errno_cache;
__u64 tmp = *addr;
*addr = 0;
rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EFAULT);
*addr = self->fault_page;
rc = ioctl(self->uv_fd, UVIO_IOCTL_ATT, &self->uvio_ioctl);
errno_cache = errno;
ASSERT_EQ(rc, -1);
ASSERT_EQ(errno_cache, EFAULT);
*addr = tmp;
}
TEST_F(attest_fixture, att_inval_addr)
{
att_inval_addr_test(&self->uvio_attest.arcb_addr, _metadata, self);
att_inval_addr_test(&self->uvio_attest.add_data_addr, _metadata, self);
att_inval_addr_test(&self->uvio_attest.meas_addr, _metadata, self);
}
static void __attribute__((constructor)) __constructor_order_last(void)
{
if (!__constructor_order)
__constructor_order = _CONSTRUCTOR_ORDER_BACKWARD;
}
int main(int argc, char **argv)
{
int fd = open(UV_PATH, O_ACCMODE);
if (fd < 0)
ksft_exit_skip("No uv-device or cannot access " UV_PATH "\n"
"Enable CONFIG_S390_UV_UAPI and check the access rights on "
UV_PATH ".\n");
close(fd);
return test_harness_run(argc, argv);
}
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