// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */
#include <
asm/unistd.h>
#include <stdlib.h>
#include <sys/capability.h>
#include <sys/mman.h>
#include <sys/eventfd.h>
#define __EXPORTED_HEADERS__
#include <linux/vfio.h>
#include "iommufd_utils.h"
static unsigned long HUGEPAGE_SIZE;
#define MOCK_PAGE_SIZE (PAGE_SIZE / 2)
#define MOCK_HUGE_PAGE_SIZE (512 * MOCK_PAGE_SIZE)
static unsigned long get_huge_page_size(
void)
{
char buf[80];
int ret;
int fd;
fd = open(
"/sys/kernel/mm/transparent_hugepage/hpage_pmd_size",
O_RDONLY);
if (fd < 0)
return 2 * 1024 * 1024;
ret = read(fd, buf,
sizeof(buf));
close(fd);
if (ret <= 0 || ret ==
sizeof(buf))
return 2 * 1024 * 1024;
buf[ret] = 0;
return strtoul(buf, NULL, 10);
}
static __attribute__((constructor))
void setup_sizes(
void)
{
void *vrc;
int rc;
PAGE_SIZE = sysconf(_SC_PAGE_SIZE);
HUGEPAGE_SIZE = get_huge_page_size();
BUFFER_SIZE = PAGE_SIZE * 16;
rc = posix_memalign(&buffer, HUGEPAGE_SIZE, BUFFER_SIZE);
assert(!rc);
assert(buffer);
assert((uintptr_t)buffer % HUGEPAGE_SIZE == 0);
vrc = mmap(buffer, BUFFER_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED, -1, 0);
assert(vrc == buffer);
mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED,
&mfd);
assert(mfd_buffer != MAP_FAILED);
assert(mfd > 0);
}
FIXTURE(iommufd)
{
int fd;
};
FIXTURE_SETUP(iommufd)
{
self->fd = open(
"/dev/iommu", O_RDWR);
ASSERT_NE(-1, self->fd);
}
FIXTURE_TEARDOWN(iommufd)
{
teardown_iommufd(self->fd, _metadata);
}
TEST_F(iommufd, simple_close)
{
}
TEST_F(iommufd, cmd_fail)
{
struct iommu_destroy cmd = { .size =
sizeof(cmd), .id = 0 };
/* object id is invalid */
EXPECT_ERRNO(ENOENT, _test_ioctl_destroy(self->fd, 0));
/* Bad pointer */
EXPECT_ERRNO(EFAULT, ioctl(self->fd, IOMMU_DESTROY, NULL));
/* Unknown ioctl */
EXPECT_ERRNO(ENOTTY,
ioctl(self->fd, _IO(IOMMUFD_TYPE, IOMMUFD_CMD_BASE - 1),
&cmd));
}
TEST_F(iommufd, cmd_length)
{
#define TEST_LENGTH(_
struct, _ioctl, _last) \
{ \
size_t min_size = offsetofend(
struct _
struct, _last); \
struct { \
struct _
struct cmd; \
uint8_t extra; \
} cmd = { .cmd = { .size = min_size - 1 }, \
.extra = UINT8_MAX }; \
int old_errno; \
int rc; \
\
EXPECT_ERRNO(EINVAL, ioctl(self->fd, _ioctl, &cmd)); \
cmd.cmd.size =
sizeof(
struct _
struct) + 1; \
EXPECT_ERRNO(E2BIG, ioctl(self->fd, _ioctl, &cmd)); \
cmd.cmd.size =
sizeof(
struct _
struct); \
rc = ioctl(self->fd, _ioctl, &cmd); \
old_errno = errno; \
cmd.cmd.size =
sizeof(
struct _
struct) + 1; \
cmd.extra = 0; \
if (rc) { \
EXPECT_ERRNO(old_errno, \
ioctl(self->fd, _ioctl, &cmd)); \
}
else { \
ASSERT_EQ(0, ioctl(self->fd, _ioctl, &cmd)); \
} \
}
TEST_LENGTH(iommu_destroy, IOMMU_DESTROY, id);
TEST_LENGTH(iommu_hw_info, IOMMU_GET_HW_INFO, __reserved);
TEST_LENGTH(iommu_hwpt_alloc, IOMMU_HWPT_ALLOC, __reserved);
TEST_LENGTH(iommu_hwpt_invalidate, IOMMU_HWPT_INVALIDATE, __reserved);
TEST_LENGTH(iommu_ioas_alloc, IOMMU_IOAS_ALLOC, out_ioas_id);
TEST_LENGTH(iommu_ioas_iova_ranges, IOMMU_IOAS_IOVA_RANGES,
out_iova_alignment);
TEST_LENGTH(iommu_ioas_allow_iovas, IOMMU_IOAS_ALLOW_IOVAS,
allowed_iovas);
TEST_LENGTH(iommu_ioas_map, IOMMU_IOAS_MAP, iova);
TEST_LENGTH(iommu_ioas_copy, IOMMU_IOAS_COPY, src_iova);
TEST_LENGTH(iommu_ioas_unmap, IOMMU_IOAS_UNMAP, length);
TEST_LENGTH(iommu_option, IOMMU_OPTION, val64);
TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS, __reserved);
TEST_LENGTH(iommu_ioas_map_file, IOMMU_IOAS_MAP_FILE, iova);
TEST_LENGTH(iommu_viommu_alloc, IOMMU_VIOMMU_ALLOC, out_viommu_id);
TEST_LENGTH(iommu_vdevice_alloc, IOMMU_VDEVICE_ALLOC, virt_id);
TEST_LENGTH(iommu_ioas_change_process, IOMMU_IOAS_CHANGE_PROCESS,
__reserved);
#undef TEST_LENGTH
}
TEST_F(iommufd, cmd_ex_fail)
{
struct {
struct iommu_destroy cmd;
__u64 future;
} cmd = { .cmd = { .size =
sizeof(cmd), .id = 0 } };
/* object id is invalid and command is longer */
EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_DESTROY, &cmd));
/* future area is non-zero */
cmd.future = 1;
EXPECT_ERRNO(E2BIG, ioctl(self->fd, IOMMU_DESTROY, &cmd));
/* Original command "works" */
cmd.cmd.size =
sizeof(cmd.cmd);
EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_DESTROY, &cmd));
/* Short command fails */
cmd.cmd.size =
sizeof(cmd.cmd) - 1;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_DESTROY, &cmd));
}
TEST_F(iommufd, global_options)
{
struct iommu_option cmd = {
.size =
sizeof(cmd),
.option_id = IOMMU_OPTION_RLIMIT_MODE,
.op = IOMMU_OPTION_OP_GET,
.val64 = 1,
};
cmd.option_id = IOMMU_OPTION_RLIMIT_MODE;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
ASSERT_EQ(0, cmd.val64);
/* This requires root */
cmd.op = IOMMU_OPTION_OP_SET;
cmd.val64 = 1;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
cmd.val64 = 2;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_OPTION, &cmd));
cmd.op = IOMMU_OPTION_OP_GET;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
ASSERT_EQ(1, cmd.val64);
cmd.op = IOMMU_OPTION_OP_SET;
cmd.val64 = 0;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
cmd.op = IOMMU_OPTION_OP_GET;
cmd.option_id = IOMMU_OPTION_HUGE_PAGES;
EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_OPTION, &cmd));
cmd.op = IOMMU_OPTION_OP_SET;
EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_OPTION, &cmd));
}
static void drop_cap_ipc_lock(
struct __test_metadata *_metadata)
{
cap_t caps;
cap_value_t cap_list[1] = { CAP_IPC_LOCK };
caps = cap_get_proc();
ASSERT_NE(caps, NULL);
ASSERT_NE(-1,
cap_set_flag(caps, CAP_EFFECTIVE, 1, cap_list, CAP_CLEAR));
ASSERT_NE(-1, cap_set_proc(caps));
cap_free(caps);
}
static long get_proc_status_value(pid_t pid,
const char *var)
{
FILE *fp;
char buf[80], tag[80];
long val = -1;
snprintf(buf,
sizeof(buf),
"/proc/%d/status", pid);
fp = fopen(buf,
"r");
if (!fp)
return val;
while (fgets(buf,
sizeof(buf), fp))
if (fscanf(fp,
"%s %ld\n", tag, &val) == 2 && !strcmp(tag, var))
break;
fclose(fp);
return val;
}
static long get_vm_pinned(pid_t pid)
{
return get_proc_status_value(pid,
"VmPin:");
}
static long get_vm_locked(pid_t pid)
{
return get_proc_status_value(pid,
"VmLck:");
}
FIXTURE(change_process)
{
int fd;
uint32_t ioas_id;
};
FIXTURE_VARIANT(change_process)
{
int accounting;
};
FIXTURE_SETUP(change_process)
{
self->fd = open(
"/dev/iommu", O_RDWR);
ASSERT_NE(-1, self->fd);
drop_cap_ipc_lock(_metadata);
if (variant->accounting != IOPT_PAGES_ACCOUNT_NONE) {
struct iommu_option set_limit_cmd = {
.size =
sizeof(set_limit_cmd),
.option_id = IOMMU_OPTION_RLIMIT_MODE,
.op = IOMMU_OPTION_OP_SET,
.val64 = (variant->accounting == IOPT_PAGES_ACCOUNT_MM),
};
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &set_limit_cmd));
}
test_ioctl_ioas_alloc(&self->ioas_id);
test_cmd_mock_domain(self->ioas_id, NULL, NULL, NULL);
}
FIXTURE_TEARDOWN(change_process)
{
teardown_iommufd(self->fd, _metadata);
}
FIXTURE_VARIANT_ADD(change_process, account_none)
{
.accounting = IOPT_PAGES_ACCOUNT_NONE,
};
FIXTURE_VARIANT_ADD(change_process, account_user)
{
.accounting = IOPT_PAGES_ACCOUNT_USER,
};
FIXTURE_VARIANT_ADD(change_process, account_mm)
{
.accounting = IOPT_PAGES_ACCOUNT_MM,
};
TEST_F(change_process, basic)
{
pid_t parent = getpid();
pid_t child;
__u64 iova;
struct iommu_ioas_change_process cmd = {
.size =
sizeof(cmd),
};
/* Expect failure if non-file maps exist */
test_ioctl_ioas_map(buffer, PAGE_SIZE, &iova);
EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_IOAS_CHANGE_PROCESS, &cmd));
test_ioctl_ioas_unmap(iova, PAGE_SIZE);
/* Change process works in current process. */
test_ioctl_ioas_map_file(mfd, 0, PAGE_SIZE, &iova);
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_CHANGE_PROCESS, &cmd));
/* Change process works in another process */
child = fork();
if (!child) {
int nlock = PAGE_SIZE / 1024;
/* Parent accounts for locked memory before */
ASSERT_EQ(nlock, get_vm_pinned(parent));
if (variant->accounting == IOPT_PAGES_ACCOUNT_MM)
ASSERT_EQ(nlock, get_vm_locked(parent));
ASSERT_EQ(0, get_vm_pinned(getpid()));
ASSERT_EQ(0, get_vm_locked(getpid()));
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_CHANGE_PROCESS, &cmd));
/* Child accounts for locked memory after */
ASSERT_EQ(0, get_vm_pinned(parent));
ASSERT_EQ(0, get_vm_locked(parent));
ASSERT_EQ(nlock, get_vm_pinned(getpid()));
if (variant->accounting == IOPT_PAGES_ACCOUNT_MM)
ASSERT_EQ(nlock, get_vm_locked(getpid()));
exit(0);
}
ASSERT_NE(-1, child);
ASSERT_EQ(child, waitpid(child, NULL, 0));
}
FIXTURE(iommufd_ioas)
{
int fd;
uint32_t ioas_id;
uint32_t stdev_id;
uint32_t hwpt_id;
uint32_t device_id;
uint64_t base_iova;
uint32_t device_pasid_id;
};
FIXTURE_VARIANT(iommufd_ioas)
{
unsigned int mock_domains;
unsigned int memory_limit;
bool pasid_capable;
};
FIXTURE_SETUP(iommufd_ioas)
{
unsigned int i;
self->fd = open(
"/dev/iommu", O_RDWR);
ASSERT_NE(-1, self->fd);
test_ioctl_ioas_alloc(&self->ioas_id);
if (!variant->memory_limit) {
test_ioctl_set_default_memory_limit();
}
else {
test_ioctl_set_temp_memory_limit(variant->memory_limit);
}
for (i = 0; i != variant->mock_domains; i++) {
test_cmd_mock_domain(self->ioas_id, &self->stdev_id,
&self->hwpt_id, &self->device_id);
test_cmd_dev_check_cache_all(self->device_id,
IOMMU_TEST_DEV_CACHE_DEFAULT);
self->base_iova = MOCK_APERTURE_START;
}
if (variant->pasid_capable)
test_cmd_mock_domain_flags(self->ioas_id,
MOCK_FLAGS_DEVICE_PASID,
NULL, NULL,
&self->device_pasid_id);
}
FIXTURE_TEARDOWN(iommufd_ioas)
{
test_ioctl_set_default_memory_limit();
teardown_iommufd(self->fd, _metadata);
}
FIXTURE_VARIANT_ADD(iommufd_ioas, no_domain)
{
};
FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain)
{
.mock_domains = 1,
.pasid_capable =
true,
};
FIXTURE_VARIANT_ADD(iommufd_ioas, two_mock_domain)
{
.mock_domains = 2,
};
FIXTURE_VARIANT_ADD(iommufd_ioas, mock_domain_limit)
{
.mock_domains = 1,
.memory_limit = 16,
};
TEST_F(iommufd_ioas, ioas_auto_destroy)
{
}
TEST_F(iommufd_ioas, ioas_destroy)
{
if (self->stdev_id) {
/* IOAS cannot be freed while a device has a HWPT using it */
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, self->ioas_id));
}
else {
/* Can allocate and manually free an IOAS table */
test_ioctl_destroy(self->ioas_id);
}
}
TEST_F(iommufd_ioas, alloc_hwpt_nested)
{
const uint32_t min_data_len =
offsetofend(
struct iommu_hwpt_selftest, iotlb);
struct iommu_hwpt_selftest data = {
.iotlb = IOMMU_TEST_IOTLB_DEFAULT,
};
struct iommu_hwpt_invalidate_selftest inv_reqs[2] = {};
uint32_t nested_hwpt_id[2] = {};
uint32_t num_inv;
uint32_t parent_hwpt_id = 0;
uint32_t parent_hwpt_id_not_work = 0;
uint32_t test_hwpt_id = 0;
uint32_t iopf_hwpt_id;
uint32_t fault_id;
uint32_t fault_fd;
if (self->device_id) {
/* Negative tests */
test_err_hwpt_alloc(ENOENT, self->ioas_id, self->device_id, 0,
&test_hwpt_id);
test_err_hwpt_alloc(EINVAL, self->device_id, self->device_id, 0,
&test_hwpt_id);
test_err_hwpt_alloc(EOPNOTSUPP, self->device_id, self->ioas_id,
IOMMU_HWPT_ALLOC_NEST_PARENT |
IOMMU_HWPT_FAULT_ID_VALID,
&test_hwpt_id);
test_cmd_hwpt_alloc(self->device_id, self->ioas_id,
IOMMU_HWPT_ALLOC_NEST_PARENT,
&parent_hwpt_id);
test_cmd_hwpt_alloc(self->device_id, self->ioas_id, 0,
&parent_hwpt_id_not_work);
/* Negative nested tests */
test_err_hwpt_alloc_nested(EINVAL, self->device_id,
parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_NONE, &data,
sizeof(data));
test_err_hwpt_alloc_nested(EOPNOTSUPP, self->device_id,
parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST + 1, &data,
sizeof(data));
test_err_hwpt_alloc_nested(EINVAL, self->device_id,
parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, &data,
min_data_len - 1);
test_err_hwpt_alloc_nested(EFAULT, self->device_id,
parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, NULL,
sizeof(data));
test_err_hwpt_alloc_nested(
EOPNOTSUPP, self->device_id, parent_hwpt_id,
IOMMU_HWPT_ALLOC_NEST_PARENT, &nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_err_hwpt_alloc_nested(EINVAL, self->device_id,
parent_hwpt_id_not_work, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
/* Allocate two nested hwpts sharing one common parent hwpt */
test_ioctl_fault_alloc(&fault_id, &fault_fd);
test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_cmd_hwpt_alloc_nested(self->device_id, parent_hwpt_id, 0,
&nested_hwpt_id[1],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_err_hwpt_alloc_iopf(ENOENT, self->device_id, parent_hwpt_id,
UINT32_MAX, IOMMU_HWPT_FAULT_ID_VALID,
&iopf_hwpt_id, IOMMU_HWPT_DATA_SELFTEST,
&data,
sizeof(data));
test_cmd_hwpt_alloc_iopf(self->device_id, parent_hwpt_id, fault_id,
IOMMU_HWPT_FAULT_ID_VALID, &iopf_hwpt_id,
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[0],
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[1],
IOMMU_TEST_IOTLB_DEFAULT);
/* Negative test: a nested hwpt on top of a nested hwpt */
test_err_hwpt_alloc_nested(EINVAL, self->device_id,
nested_hwpt_id[0], 0, &test_hwpt_id,
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
/* Negative test: parent hwpt now cannot be freed */
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, parent_hwpt_id));
/* hwpt_invalidate does not support a parent hwpt */
num_inv = 1;
test_err_hwpt_invalidate(EINVAL, parent_hwpt_id, inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(!num_inv);
/* Check data_type by passing zero-length array */
num_inv = 0;
test_cmd_hwpt_invalidate(nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(!num_inv);
/* Negative test: Invalid data_type */
num_inv = 1;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST_INVALID,
sizeof(*inv_reqs), &num_inv);
assert(!num_inv);
/* Negative test: structure size sanity */
num_inv = 1;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs) + 1, &num_inv);
assert(!num_inv);
num_inv = 1;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
1, &num_inv);
assert(!num_inv);
/* Negative test: invalid flag is passed */
num_inv = 1;
inv_reqs[0].flags = 0xffffffff;
test_err_hwpt_invalidate(EOPNOTSUPP, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(!num_inv);
/* Negative test: invalid data_uptr when array is not empty */
num_inv = 1;
inv_reqs[0].flags = 0;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], NULL,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(!num_inv);
/* Negative test: invalid entry_len when array is not empty */
num_inv = 1;
inv_reqs[0].flags = 0;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
0, &num_inv);
assert(!num_inv);
/* Negative test: invalid iotlb_id */
num_inv = 1;
inv_reqs[0].flags = 0;
inv_reqs[0].iotlb_id = MOCK_NESTED_DOMAIN_IOTLB_ID_MAX + 1;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(!num_inv);
/*
* Invalidate the 1st iotlb entry but fail the 2nd request
* due to invalid flags configuration in the 2nd request.
*/
num_inv = 2;
inv_reqs[0].flags = 0;
inv_reqs[0].iotlb_id = 0;
inv_reqs[1].flags = 0xffffffff;
inv_reqs[1].iotlb_id = 1;
test_err_hwpt_invalidate(EOPNOTSUPP, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(num_inv == 1);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 0, 0);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 1,
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 2,
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 3,
IOMMU_TEST_IOTLB_DEFAULT);
/*
* Invalidate the 1st iotlb entry but fail the 2nd request
* due to invalid iotlb_id configuration in the 2nd request.
*/
num_inv = 2;
inv_reqs[0].flags = 0;
inv_reqs[0].iotlb_id = 0;
inv_reqs[1].flags = 0;
inv_reqs[1].iotlb_id = MOCK_NESTED_DOMAIN_IOTLB_ID_MAX + 1;
test_err_hwpt_invalidate(EINVAL, nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(num_inv == 1);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 0, 0);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 1,
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 2,
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 3,
IOMMU_TEST_IOTLB_DEFAULT);
/* Invalidate the 2nd iotlb entry and verify */
num_inv = 1;
inv_reqs[0].flags = 0;
inv_reqs[0].iotlb_id = 1;
test_cmd_hwpt_invalidate(nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(num_inv == 1);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 0, 0);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 1, 0);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 2,
IOMMU_TEST_IOTLB_DEFAULT);
test_cmd_hwpt_check_iotlb(nested_hwpt_id[0], 3,
IOMMU_TEST_IOTLB_DEFAULT);
/* Invalidate the 3rd and 4th iotlb entries and verify */
num_inv = 2;
inv_reqs[0].flags = 0;
inv_reqs[0].iotlb_id = 2;
inv_reqs[1].flags = 0;
inv_reqs[1].iotlb_id = 3;
test_cmd_hwpt_invalidate(nested_hwpt_id[0], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(num_inv == 2);
test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[0], 0);
/* Invalidate all iotlb entries for nested_hwpt_id[1] and verify */
num_inv = 1;
inv_reqs[0].flags = IOMMU_TEST_INVALIDATE_FLAG_ALL;
test_cmd_hwpt_invalidate(nested_hwpt_id[1], inv_reqs,
IOMMU_HWPT_INVALIDATE_DATA_SELFTEST,
sizeof(*inv_reqs), &num_inv);
assert(num_inv == 1);
test_cmd_hwpt_check_iotlb_all(nested_hwpt_id[1], 0);
/* Attach device to nested_hwpt_id[0] that then will be busy */
test_cmd_mock_domain_replace(self->stdev_id, nested_hwpt_id[0]);
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, nested_hwpt_id[0]));
/* Switch from nested_hwpt_id[0] to nested_hwpt_id[1] */
test_cmd_mock_domain_replace(self->stdev_id, nested_hwpt_id[1]);
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, nested_hwpt_id[1]));
test_ioctl_destroy(nested_hwpt_id[0]);
/* Switch from nested_hwpt_id[1] to iopf_hwpt_id */
test_cmd_mock_domain_replace(self->stdev_id, iopf_hwpt_id);
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, iopf_hwpt_id));
/* Trigger an IOPF on the device */
test_cmd_trigger_iopf(self->device_id, fault_fd);
/* Detach from nested_hwpt_id[1] and destroy it */
test_cmd_mock_domain_replace(self->stdev_id, parent_hwpt_id);
test_ioctl_destroy(nested_hwpt_id[1]);
test_ioctl_destroy(iopf_hwpt_id);
/* Detach from the parent hw_pagetable and destroy it */
test_cmd_mock_domain_replace(self->stdev_id, self->ioas_id);
test_ioctl_destroy(parent_hwpt_id);
test_ioctl_destroy(parent_hwpt_id_not_work);
close(fault_fd);
test_ioctl_destroy(fault_id);
}
else {
test_err_hwpt_alloc(ENOENT, self->device_id, self->ioas_id, 0,
&parent_hwpt_id);
test_err_hwpt_alloc_nested(ENOENT, self->device_id,
parent_hwpt_id, 0,
&nested_hwpt_id[0],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_err_hwpt_alloc_nested(ENOENT, self->device_id,
parent_hwpt_id, 0,
&nested_hwpt_id[1],
IOMMU_HWPT_DATA_SELFTEST, &data,
sizeof(data));
test_err_mock_domain_replace(ENOENT, self->stdev_id,
nested_hwpt_id[0]);
test_err_mock_domain_replace(ENOENT, self->stdev_id,
nested_hwpt_id[1]);
}
}
TEST_F(iommufd_ioas, hwpt_attach)
{
/* Create a device attached directly to a hwpt */
if (self->stdev_id) {
test_cmd_mock_domain(self->hwpt_id, NULL, NULL, NULL);
}
else {
test_err_mock_domain(ENOENT, self->hwpt_id, NULL, NULL);
}
}
TEST_F(iommufd_ioas, ioas_area_destroy)
{
/* Adding an area does not change ability to destroy */
test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, self->base_iova);
if (self->stdev_id)
EXPECT_ERRNO(EBUSY,
_test_ioctl_destroy(self->fd, self->ioas_id));
else
test_ioctl_destroy(self->ioas_id);
}
TEST_F(iommufd_ioas, ioas_area_auto_destroy)
{
int i;
/* Can allocate and automatically free an IOAS table with many areas */
for (i = 0; i != 10; i++) {
test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE,
self->base_iova + i * PAGE_SIZE);
}
}
TEST_F(iommufd_ioas, get_hw_info)
{
struct iommu_test_hw_info buffer_exact;
struct iommu_test_hw_info_buffer_larger {
struct iommu_test_hw_info info;
uint64_t trailing_bytes;
} buffer_larger;
struct iommu_test_hw_info_buffer_smaller {
__u32 flags;
} buffer_smaller;
if (self->device_id) {
uint8_t max_pasid = 0;
/* Provide a zero-size user_buffer */
test_cmd_get_hw_info(self->device_id,
IOMMU_HW_INFO_TYPE_DEFAULT, NULL, 0);
/* Provide a user_buffer with exact size */
test_cmd_get_hw_info(self->device_id,
IOMMU_HW_INFO_TYPE_DEFAULT, &buffer_exact,
sizeof(buffer_exact));
/* Request for a wrong data_type, and a correct one */
test_err_get_hw_info(EOPNOTSUPP, self->device_id,
IOMMU_HW_INFO_TYPE_SELFTEST + 1,
&buffer_exact,
sizeof(buffer_exact));
test_cmd_get_hw_info(self->device_id,
IOMMU_HW_INFO_TYPE_SELFTEST, &buffer_exact,
sizeof(buffer_exact));
/*
* Provide a user_buffer with size larger than the exact size to check if
* kernel zero the trailing bytes.
*/
test_cmd_get_hw_info(self->device_id,
IOMMU_HW_INFO_TYPE_DEFAULT, &buffer_larger,
sizeof(buffer_larger));
/*
* Provide a user_buffer with size smaller than the exact size to check if
* the fields within the size range still gets updated.
*/
test_cmd_get_hw_info(self->device_id,
IOMMU_HW_INFO_TYPE_DEFAULT,
&buffer_smaller,
sizeof(buffer_smaller));
test_cmd_get_hw_info_pasid(self->device_id, &max_pasid);
ASSERT_EQ(0, max_pasid);
if (variant->pasid_capable) {
test_cmd_get_hw_info_pasid(self->device_pasid_id,
&max_pasid);
ASSERT_EQ(MOCK_PASID_WIDTH, max_pasid);
}
}
else {
test_err_get_hw_info(ENOENT, self->device_id,
IOMMU_HW_INFO_TYPE_DEFAULT, &buffer_exact,
sizeof(buffer_exact));
test_err_get_hw_info(ENOENT, self->device_id,
IOMMU_HW_INFO_TYPE_DEFAULT, &buffer_larger,
sizeof(buffer_larger));
}
}
TEST_F(iommufd_ioas, area)
{
int i;
/* Unmap fails if nothing is mapped */
for (i = 0; i != 10; i++)
test_err_ioctl_ioas_unmap(ENOENT, i * PAGE_SIZE, PAGE_SIZE);
/* Unmap works */
for (i = 0; i != 10; i++)
test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE,
self->base_iova + i * PAGE_SIZE);
for (i = 0; i != 10; i++)
test_ioctl_ioas_unmap(self->base_iova + i * PAGE_SIZE,
PAGE_SIZE);
/* Split fails */
test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE * 2,
self->base_iova + 16 * PAGE_SIZE);
test_err_ioctl_ioas_unmap(ENOENT, self->base_iova + 16 * PAGE_SIZE,
PAGE_SIZE);
test_err_ioctl_ioas_unmap(ENOENT, self->base_iova + 17 * PAGE_SIZE,
PAGE_SIZE);
/* Over map fails */
test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE * 2,
self->base_iova + 16 * PAGE_SIZE);
test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE,
self->base_iova + 16 * PAGE_SIZE);
test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE,
self->base_iova + 17 * PAGE_SIZE);
test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE * 2,
self->base_iova + 15 * PAGE_SIZE);
test_err_ioctl_ioas_map_fixed(EEXIST, buffer, PAGE_SIZE * 3,
self->base_iova + 15 * PAGE_SIZE);
/* unmap all works */
test_ioctl_ioas_unmap(0, UINT64_MAX);
/* Unmap all succeeds on an empty IOAS */
test_ioctl_ioas_unmap(0, UINT64_MAX);
}
TEST_F(iommufd_ioas, unmap_fully_contained_areas)
{
uint64_t unmap_len;
int i;
/* Give no_domain some space to rewind base_iova */
self->base_iova += 4 * PAGE_SIZE;
for (i = 0; i != 4; i++)
test_ioctl_ioas_map_fixed(buffer, 8 * PAGE_SIZE,
self->base_iova + i * 16 * PAGE_SIZE);
/* Unmap not fully contained area doesn't work */
test_err_ioctl_ioas_unmap(ENOENT, self->base_iova - 4 * PAGE_SIZE,
8 * PAGE_SIZE);
test_err_ioctl_ioas_unmap(ENOENT,
self->base_iova + 3 * 16 * PAGE_SIZE +
8 * PAGE_SIZE - 4 * PAGE_SIZE,
8 * PAGE_SIZE);
/* Unmap fully contained areas works */
ASSERT_EQ(0, _test_ioctl_ioas_unmap(self->fd, self->ioas_id,
self->base_iova - 4 * PAGE_SIZE,
3 * 16 * PAGE_SIZE + 8 * PAGE_SIZE +
4 * PAGE_SIZE,
&unmap_len));
ASSERT_EQ(32 * PAGE_SIZE, unmap_len);
}
TEST_F(iommufd_ioas, area_auto_iova)
{
struct iommu_test_cmd test_cmd = {
.size =
sizeof(test_cmd),
.op = IOMMU_TEST_OP_ADD_RESERVED,
.id = self->ioas_id,
.add_reserved = { .start = PAGE_SIZE * 4,
.length = PAGE_SIZE * 100 },
};
struct iommu_iova_range ranges[1] = {};
struct iommu_ioas_allow_iovas allow_cmd = {
.size =
sizeof(allow_cmd),
.ioas_id = self->ioas_id,
.num_iovas = 1,
.allowed_iovas = (uintptr_t)ranges,
};
__u64 iovas[10];
int i;
/* Simple 4k pages */
for (i = 0; i != 10; i++)
test_ioctl_ioas_map(buffer, PAGE_SIZE, &iovas[i]);
for (i = 0; i != 10; i++)
test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE);
/* Kernel automatically aligns IOVAs properly */
for (i = 0; i != 10; i++) {
size_t length = PAGE_SIZE * (i + 1);
if (self->stdev_id) {
test_ioctl_ioas_map(buffer, length, &iovas[i]);
}
else {
test_ioctl_ioas_map((
void *)(1UL << 31), length,
&iovas[i]);
}
EXPECT_EQ(0, iovas[i] % (1UL << (ffs(length) - 1)));
}
for (i = 0; i != 10; i++)
test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE * (i + 1));
/* Avoids a reserved region */
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED),
&test_cmd));
for (i = 0; i != 10; i++) {
size_t length = PAGE_SIZE * (i + 1);
test_ioctl_ioas_map(buffer, length, &iovas[i]);
EXPECT_EQ(0, iovas[i] % (1UL << (ffs(length) - 1)));
EXPECT_EQ(
false,
iovas[i] > test_cmd.add_reserved.start &&
iovas[i] <
test_cmd.add_reserved.start +
test_cmd.add_reserved.length);
}
for (i = 0; i != 10; i++)
test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE * (i + 1));
/* Allowed region intersects with a reserved region */
ranges[0].start = PAGE_SIZE;
ranges[0].last = PAGE_SIZE * 600;
EXPECT_ERRNO(EADDRINUSE,
ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd));
/* Allocate from an allowed region */
if (self->stdev_id) {
ranges[0].start = MOCK_APERTURE_START + PAGE_SIZE;
ranges[0].last = MOCK_APERTURE_START + PAGE_SIZE * 600 - 1;
}
else {
ranges[0].start = PAGE_SIZE * 200;
ranges[0].last = PAGE_SIZE * 600 - 1;
}
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd));
for (i = 0; i != 10; i++) {
size_t length = PAGE_SIZE * (i + 1);
test_ioctl_ioas_map(buffer, length, &iovas[i]);
EXPECT_EQ(0, iovas[i] % (1UL << (ffs(length) - 1)));
EXPECT_EQ(
true, iovas[i] >= ranges[0].start);
EXPECT_EQ(
true, iovas[i] <= ranges[0].last);
EXPECT_EQ(
true, iovas[i] + length > ranges[0].start);
EXPECT_EQ(
true, iovas[i] + length <= ranges[0].last + 1);
}
for (i = 0; i != 10; i++)
test_ioctl_ioas_unmap(iovas[i], PAGE_SIZE * (i + 1));
}
/* https://lore.kernel.org/r/685af644.a00a0220.2e5631.0094.GAE@google.com */
TEST_F(iommufd_ioas, reserved_overflow)
{
struct iommu_test_cmd test_cmd = {
.size =
sizeof(test_cmd),
.op = IOMMU_TEST_OP_ADD_RESERVED,
.id = self->ioas_id,
.add_reserved.start = 6,
};
unsigned int map_len;
__u64 iova;
if (PAGE_SIZE == 4096) {
test_cmd.add_reserved.length = 0xffffffffffff8001;
map_len = 0x5000;
}
else {
test_cmd.add_reserved.length =
0xffffffffffffffff - MOCK_PAGE_SIZE * 16;
map_len = MOCK_PAGE_SIZE * 10;
}
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED),
&test_cmd));
test_err_ioctl_ioas_map(ENOSPC, buffer, map_len, &iova);
}
TEST_F(iommufd_ioas, area_allowed)
{
struct iommu_test_cmd test_cmd = {
.size =
sizeof(test_cmd),
.op = IOMMU_TEST_OP_ADD_RESERVED,
.id = self->ioas_id,
.add_reserved = { .start = PAGE_SIZE * 4,
.length = PAGE_SIZE * 100 },
};
struct iommu_iova_range ranges[1] = {};
struct iommu_ioas_allow_iovas allow_cmd = {
.size =
sizeof(allow_cmd),
.ioas_id = self->ioas_id,
.num_iovas = 1,
.allowed_iovas = (uintptr_t)ranges,
};
/* Reserved intersects an allowed */
allow_cmd.num_iovas = 1;
ranges[0].start = self->base_iova;
ranges[0].last = ranges[0].start + PAGE_SIZE * 600;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd));
test_cmd.add_reserved.start = ranges[0].start + PAGE_SIZE;
test_cmd.add_reserved.length = PAGE_SIZE;
EXPECT_ERRNO(EADDRINUSE,
ioctl(self->fd,
_IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED),
&test_cmd));
allow_cmd.num_iovas = 0;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd));
/* Allowed intersects a reserved */
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED),
&test_cmd));
allow_cmd.num_iovas = 1;
ranges[0].start = self->base_iova;
ranges[0].last = ranges[0].start + PAGE_SIZE * 600;
EXPECT_ERRNO(EADDRINUSE,
ioctl(self->fd, IOMMU_IOAS_ALLOW_IOVAS, &allow_cmd));
}
TEST_F(iommufd_ioas, copy_area)
{
struct iommu_ioas_copy copy_cmd = {
.size =
sizeof(copy_cmd),
.flags = IOMMU_IOAS_MAP_FIXED_IOVA | IOMMU_IOAS_MAP_WRITEABLE,
.dst_ioas_id = self->ioas_id,
.src_ioas_id = self->ioas_id,
.length = PAGE_SIZE,
};
test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, self->base_iova);
/* Copy inside a single IOAS */
copy_cmd.src_iova = self->base_iova;
copy_cmd.dst_iova = self->base_iova + PAGE_SIZE;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
/* Copy between IOAS's */
copy_cmd.src_iova = self->base_iova;
copy_cmd.dst_iova = 0;
test_ioctl_ioas_alloc(©_cmd.dst_ioas_id);
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
}
TEST_F(iommufd_ioas, iova_ranges)
{
struct iommu_test_cmd test_cmd = {
.size =
sizeof(test_cmd),
.op = IOMMU_TEST_OP_ADD_RESERVED,
.id = self->ioas_id,
.add_reserved = { .start = PAGE_SIZE, .length = PAGE_SIZE },
};
struct iommu_iova_range *ranges = buffer;
struct iommu_ioas_iova_ranges ranges_cmd = {
.size =
sizeof(ranges_cmd),
.ioas_id = self->ioas_id,
.num_iovas = BUFFER_SIZE /
sizeof(*ranges),
.allowed_iovas = (uintptr_t)ranges,
};
/* Range can be read */
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd));
EXPECT_EQ(1, ranges_cmd.num_iovas);
if (!self->stdev_id) {
EXPECT_EQ(0, ranges[0].start);
EXPECT_EQ(SIZE_MAX, ranges[0].last);
EXPECT_EQ(1, ranges_cmd.out_iova_alignment);
}
else {
EXPECT_EQ(MOCK_APERTURE_START, ranges[0].start);
EXPECT_EQ(MOCK_APERTURE_LAST, ranges[0].last);
EXPECT_EQ(MOCK_PAGE_SIZE, ranges_cmd.out_iova_alignment);
}
/* Buffer too small */
memset(ranges, 0, BUFFER_SIZE);
ranges_cmd.num_iovas = 0;
EXPECT_ERRNO(EMSGSIZE,
ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd));
EXPECT_EQ(1, ranges_cmd.num_iovas);
EXPECT_EQ(0, ranges[0].start);
EXPECT_EQ(0, ranges[0].last);
/* 2 ranges */
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ADD_RESERVED),
&test_cmd));
ranges_cmd.num_iovas = BUFFER_SIZE /
sizeof(*ranges);
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd));
if (!self->stdev_id) {
EXPECT_EQ(2, ranges_cmd.num_iovas);
EXPECT_EQ(0, ranges[0].start);
EXPECT_EQ(PAGE_SIZE - 1, ranges[0].last);
EXPECT_EQ(PAGE_SIZE * 2, ranges[1].start);
EXPECT_EQ(SIZE_MAX, ranges[1].last);
}
else {
EXPECT_EQ(1, ranges_cmd.num_iovas);
EXPECT_EQ(MOCK_APERTURE_START, ranges[0].start);
EXPECT_EQ(MOCK_APERTURE_LAST, ranges[0].last);
}
/* Buffer too small */
memset(ranges, 0, BUFFER_SIZE);
ranges_cmd.num_iovas = 1;
if (!self->stdev_id) {
EXPECT_ERRNO(EMSGSIZE, ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES,
&ranges_cmd));
EXPECT_EQ(2, ranges_cmd.num_iovas);
EXPECT_EQ(0, ranges[0].start);
EXPECT_EQ(PAGE_SIZE - 1, ranges[0].last);
}
else {
ASSERT_EQ(0,
ioctl(self->fd, IOMMU_IOAS_IOVA_RANGES, &ranges_cmd));
EXPECT_EQ(1, ranges_cmd.num_iovas);
EXPECT_EQ(MOCK_APERTURE_START, ranges[0].start);
EXPECT_EQ(MOCK_APERTURE_LAST, ranges[0].last);
}
EXPECT_EQ(0, ranges[1].start);
EXPECT_EQ(0, ranges[1].last);
}
TEST_F(iommufd_ioas, access_domain_destory)
{
struct iommu_test_cmd access_cmd = {
.size =
sizeof(access_cmd),
.op = IOMMU_TEST_OP_ACCESS_PAGES,
.access_pages = { .iova = self->base_iova + PAGE_SIZE,
.length = PAGE_SIZE},
};
size_t buf_size = 2 * HUGEPAGE_SIZE;
uint8_t *buf;
buf = mmap(0, buf_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, -1,
0);
ASSERT_NE(MAP_FAILED, buf);
test_ioctl_ioas_map_fixed(buf, buf_size, self->base_iova);
test_cmd_create_access(self->ioas_id, &access_cmd.id,
MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES);
access_cmd.access_pages.uptr = (uintptr_t)buf + PAGE_SIZE;
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
/* Causes a complicated unpin across a huge page boundary */
if (self->stdev_id)
test_ioctl_destroy(self->stdev_id);
test_cmd_destroy_access_pages(
access_cmd.id, access_cmd.access_pages.out_access_pages_id);
test_cmd_destroy_access(access_cmd.id);
ASSERT_EQ(0, munmap(buf, buf_size));
}
TEST_F(iommufd_ioas, access_pin)
{
struct iommu_test_cmd access_cmd = {
.size =
sizeof(access_cmd),
.op = IOMMU_TEST_OP_ACCESS_PAGES,
.access_pages = { .iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
.uptr = (uintptr_t)buffer },
};
struct iommu_test_cmd check_map_cmd = {
.size =
sizeof(check_map_cmd),
.op = IOMMU_TEST_OP_MD_CHECK_MAP,
.check_map = { .iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
.uptr = (uintptr_t)buffer },
};
uint32_t access_pages_id;
unsigned int npages;
test_cmd_create_access(self->ioas_id, &access_cmd.id,
MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES);
for (npages = 1; npages < BUFFER_SIZE / PAGE_SIZE; npages++) {
uint32_t mock_stdev_id;
uint32_t mock_hwpt_id;
access_cmd.access_pages.length = npages * PAGE_SIZE;
/* Single map/unmap */
test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE,
MOCK_APERTURE_START);
ASSERT_EQ(0, ioctl(self->fd,
_IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
test_cmd_destroy_access_pages(
access_cmd.id,
access_cmd.access_pages.out_access_pages_id);
/* Double user */
ASSERT_EQ(0, ioctl(self->fd,
_IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
access_pages_id = access_cmd.access_pages.out_access_pages_id;
ASSERT_EQ(0, ioctl(self->fd,
_IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
test_cmd_destroy_access_pages(
access_cmd.id,
access_cmd.access_pages.out_access_pages_id);
test_cmd_destroy_access_pages(access_cmd.id, access_pages_id);
/* Add/remove a domain with a user */
ASSERT_EQ(0, ioctl(self->fd,
_IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
test_cmd_mock_domain(self->ioas_id, &mock_stdev_id,
&mock_hwpt_id, NULL);
check_map_cmd.id = mock_hwpt_id;
ASSERT_EQ(0, ioctl(self->fd,
_IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_MAP),
&check_map_cmd));
test_ioctl_destroy(mock_stdev_id);
test_cmd_destroy_access_pages(
access_cmd.id,
access_cmd.access_pages.out_access_pages_id);
test_ioctl_ioas_unmap(MOCK_APERTURE_START, BUFFER_SIZE);
}
test_cmd_destroy_access(access_cmd.id);
}
TEST_F(iommufd_ioas, access_pin_unmap)
{
struct iommu_test_cmd access_pages_cmd = {
.size =
sizeof(access_pages_cmd),
.op = IOMMU_TEST_OP_ACCESS_PAGES,
.access_pages = { .iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
.uptr = (uintptr_t)buffer },
};
test_cmd_create_access(self->ioas_id, &access_pages_cmd.id,
MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES);
test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, MOCK_APERTURE_START);
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_pages_cmd));
/* Trigger the unmap op */
test_ioctl_ioas_unmap(MOCK_APERTURE_START, BUFFER_SIZE);
/* kernel removed the item for us */
test_err_destroy_access_pages(
ENOENT, access_pages_cmd.id,
access_pages_cmd.access_pages.out_access_pages_id);
}
static void check_access_rw(
struct __test_metadata *_metadata,
int fd,
unsigned int access_id, uint64_t iova,
unsigned int def_flags)
{
uint16_t tmp[32];
struct iommu_test_cmd access_cmd = {
.size =
sizeof(access_cmd),
.op = IOMMU_TEST_OP_ACCESS_RW,
.id = access_id,
.access_rw = { .uptr = (uintptr_t)tmp },
};
uint16_t *buffer16 = buffer;
unsigned int i;
void *tmp2;
for (i = 0; i != BUFFER_SIZE /
sizeof(*buffer16); i++)
buffer16[i] = rand();
for (access_cmd.access_rw.iova = iova + PAGE_SIZE - 50;
access_cmd.access_rw.iova < iova + PAGE_SIZE + 50;
access_cmd.access_rw.iova++) {
for (access_cmd.access_rw.length = 1;
access_cmd.access_rw.length <
sizeof(tmp);
access_cmd.access_rw.length++) {
access_cmd.access_rw.flags = def_flags;
ASSERT_EQ(0, ioctl(fd,
_IOMMU_TEST_CMD(
IOMMU_TEST_OP_ACCESS_RW),
&access_cmd));
ASSERT_EQ(0,
memcmp(buffer + (access_cmd.access_rw.iova -
iova),
tmp, access_cmd.access_rw.length));
for (i = 0; i != ARRAY_SIZE(tmp); i++)
tmp[i] = rand();
access_cmd.access_rw.flags = def_flags |
MOCK_ACCESS_RW_WRITE;
ASSERT_EQ(0, ioctl(fd,
_IOMMU_TEST_CMD(
IOMMU_TEST_OP_ACCESS_RW),
&access_cmd));
ASSERT_EQ(0,
memcmp(buffer + (access_cmd.access_rw.iova -
iova),
tmp, access_cmd.access_rw.length));
}
}
/* Multi-page test */
tmp2 = malloc(BUFFER_SIZE);
ASSERT_NE(NULL, tmp2);
access_cmd.access_rw.iova = iova;
access_cmd.access_rw.length = BUFFER_SIZE;
access_cmd.access_rw.flags = def_flags;
access_cmd.access_rw.uptr = (uintptr_t)tmp2;
ASSERT_EQ(0, ioctl(fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_RW),
&access_cmd));
ASSERT_EQ(0, memcmp(buffer, tmp2, access_cmd.access_rw.length));
free(tmp2);
}
TEST_F(iommufd_ioas, access_rw)
{
__u32 access_id;
__u64 iova;
test_cmd_create_access(self->ioas_id, &access_id, 0);
test_ioctl_ioas_map(buffer, BUFFER_SIZE, &iova);
check_access_rw(_metadata, self->fd, access_id, iova, 0);
check_access_rw(_metadata, self->fd, access_id, iova,
MOCK_ACCESS_RW_SLOW_PATH);
test_ioctl_ioas_unmap(iova, BUFFER_SIZE);
test_cmd_destroy_access(access_id);
}
TEST_F(iommufd_ioas, access_rw_unaligned)
{
__u32 access_id;
__u64 iova;
test_cmd_create_access(self->ioas_id, &access_id, 0);
/* Unaligned pages */
iova = self->base_iova + MOCK_PAGE_SIZE;
test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE, iova);
check_access_rw(_metadata, self->fd, access_id, iova, 0);
test_ioctl_ioas_unmap(iova, BUFFER_SIZE);
test_cmd_destroy_access(access_id);
}
TEST_F(iommufd_ioas, fork_gone)
{
__u32 access_id;
pid_t child;
test_cmd_create_access(self->ioas_id, &access_id, 0);
/* Create a mapping with a different mm */
child = fork();
if (!child) {
test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE,
MOCK_APERTURE_START);
exit(0);
}
ASSERT_NE(-1, child);
ASSERT_EQ(child, waitpid(child, NULL, 0));
if (self->stdev_id) {
/*
* If a domain already existed then everything was pinned within
* the fork, so this copies from one domain to another.
*/
test_cmd_mock_domain(self->ioas_id, NULL, NULL, NULL);
check_access_rw(_metadata, self->fd, access_id,
MOCK_APERTURE_START, 0);
}
else {
/*
* Otherwise we need to actually pin pages which can't happen
* since the fork is gone.
*/
test_err_mock_domain(EFAULT, self->ioas_id, NULL, NULL);
}
test_cmd_destroy_access(access_id);
}
TEST_F(iommufd_ioas, fork_present)
{
__u32 access_id;
int pipefds[2];
uint64_t tmp;
pid_t child;
int efd;
test_cmd_create_access(self->ioas_id, &access_id, 0);
ASSERT_EQ(0, pipe2(pipefds, O_CLOEXEC));
efd = eventfd(0, EFD_CLOEXEC);
ASSERT_NE(-1, efd);
/* Create a mapping with a different mm */
child = fork();
if (!child) {
__u64 iova;
uint64_t one = 1;
close(pipefds[1]);
test_ioctl_ioas_map_fixed(buffer, BUFFER_SIZE,
MOCK_APERTURE_START);
if (write(efd, &one,
sizeof(one)) !=
sizeof(one))
exit(100);
if (read(pipefds[0], &iova, 1) != 1)
exit(100);
exit(0);
}
close(pipefds[0]);
ASSERT_NE(-1, child);
ASSERT_EQ(8, read(efd, &tmp,
sizeof(tmp)));
/* Read pages from the remote process */
test_cmd_mock_domain(self->ioas_id, NULL, NULL, NULL);
check_access_rw(_metadata, self->fd, access_id, MOCK_APERTURE_START, 0);
ASSERT_EQ(0, close(pipefds[1]));
ASSERT_EQ(child, waitpid(child, NULL, 0));
test_cmd_destroy_access(access_id);
}
TEST_F(iommufd_ioas, ioas_option_huge_pages)
{
struct iommu_option cmd = {
.size =
sizeof(cmd),
.option_id = IOMMU_OPTION_HUGE_PAGES,
.op = IOMMU_OPTION_OP_GET,
.val64 = 3,
.object_id = self->ioas_id,
};
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
ASSERT_EQ(1, cmd.val64);
cmd.op = IOMMU_OPTION_OP_SET;
cmd.val64 = 0;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
cmd.op = IOMMU_OPTION_OP_GET;
cmd.val64 = 3;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
ASSERT_EQ(0, cmd.val64);
cmd.op = IOMMU_OPTION_OP_SET;
cmd.val64 = 2;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, IOMMU_OPTION, &cmd));
cmd.op = IOMMU_OPTION_OP_SET;
cmd.val64 = 1;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
}
TEST_F(iommufd_ioas, ioas_iova_alloc)
{
unsigned int length;
__u64 iova;
for (length = 1; length != PAGE_SIZE * 2; length++) {
if (variant->mock_domains && (length % MOCK_PAGE_SIZE)) {
test_err_ioctl_ioas_map(EINVAL, buffer, length, &iova);
}
else {
test_ioctl_ioas_map(buffer, length, &iova);
test_ioctl_ioas_unmap(iova, length);
}
}
}
TEST_F(iommufd_ioas, ioas_align_change)
{
struct iommu_option cmd = {
.size =
sizeof(cmd),
.option_id = IOMMU_OPTION_HUGE_PAGES,
.op = IOMMU_OPTION_OP_SET,
.object_id = self->ioas_id,
/* 0 means everything must be aligned to PAGE_SIZE */
.val64 = 0,
};
/*
* We cannot upgrade the alignment using OPTION_HUGE_PAGES when a domain
* and map are present.
*/
if (variant->mock_domains)
return;
/*
* We can upgrade to PAGE_SIZE alignment when things are aligned right
*/
test_ioctl_ioas_map_fixed(buffer, PAGE_SIZE, MOCK_APERTURE_START);
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
/* Misalignment is rejected at map time */
test_err_ioctl_ioas_map_fixed(EINVAL, buffer + MOCK_PAGE_SIZE,
PAGE_SIZE,
MOCK_APERTURE_START + PAGE_SIZE);
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
/* Reduce alignment */
cmd.val64 = 1;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_OPTION, &cmd));
/* Confirm misalignment is rejected during alignment upgrade */
test_ioctl_ioas_map_fixed(buffer + MOCK_PAGE_SIZE, PAGE_SIZE,
MOCK_APERTURE_START + PAGE_SIZE);
cmd.val64 = 0;
EXPECT_ERRNO(EADDRINUSE, ioctl(self->fd, IOMMU_OPTION, &cmd));
test_ioctl_ioas_unmap(MOCK_APERTURE_START + PAGE_SIZE, PAGE_SIZE);
test_ioctl_ioas_unmap(MOCK_APERTURE_START, PAGE_SIZE);
}
TEST_F(iommufd_ioas, copy_sweep)
{
struct iommu_ioas_copy copy_cmd = {
.size =
sizeof(copy_cmd),
.flags = IOMMU_IOAS_MAP_FIXED_IOVA | IOMMU_IOAS_MAP_WRITEABLE,
.src_ioas_id = self->ioas_id,
.dst_iova = MOCK_APERTURE_START,
.length = MOCK_PAGE_SIZE,
};
unsigned int dst_ioas_id;
uint64_t last_iova;
uint64_t iova;
test_ioctl_ioas_alloc(&dst_ioas_id);
copy_cmd.dst_ioas_id = dst_ioas_id;
if (variant->mock_domains)
last_iova = MOCK_APERTURE_START + BUFFER_SIZE - 1;
else
last_iova = MOCK_APERTURE_START + BUFFER_SIZE - 2;
test_ioctl_ioas_map_fixed(buffer, last_iova - MOCK_APERTURE_START + 1,
MOCK_APERTURE_START);
for (iova = MOCK_APERTURE_START - PAGE_SIZE; iova <= last_iova;
iova += 511) {
copy_cmd.src_iova = iova;
if (iova < MOCK_APERTURE_START ||
iova + copy_cmd.length - 1 > last_iova) {
EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_IOAS_COPY,
©_cmd));
}
else {
ASSERT_EQ(0,
ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
test_ioctl_ioas_unmap_id(dst_ioas_id, copy_cmd.dst_iova,
copy_cmd.length);
}
}
test_ioctl_destroy(dst_ioas_id);
}
FIXTURE(iommufd_mock_domain)
{
int fd;
uint32_t ioas_id;
uint32_t hwpt_id;
uint32_t hwpt_ids[2];
uint32_t stdev_ids[2];
uint32_t idev_ids[2];
int mmap_flags;
size_t mmap_buf_size;
};
FIXTURE_VARIANT(iommufd_mock_domain)
{
unsigned int mock_domains;
bool hugepages;
bool file;
};
FIXTURE_SETUP(iommufd_mock_domain)
{
unsigned int i;
self->fd = open(
"/dev/iommu", O_RDWR);
ASSERT_NE(-1, self->fd);
test_ioctl_ioas_alloc(&self->ioas_id);
ASSERT_GE(ARRAY_SIZE(self->hwpt_ids), variant->mock_domains);
for (i = 0; i != variant->mock_domains; i++) {
test_cmd_mock_domain(self->ioas_id, &self->stdev_ids[i],
&self->hwpt_ids[i], &self->idev_ids[i]);
test_cmd_dev_check_cache_all(self->idev_ids[0],
IOMMU_TEST_DEV_CACHE_DEFAULT);
}
self->hwpt_id = self->hwpt_ids[0];
self->mmap_flags = MAP_SHARED | MAP_ANONYMOUS;
self->mmap_buf_size = PAGE_SIZE * 8;
if (variant->hugepages) {
/*
* MAP_POPULATE will cause the kernel to fail mmap if THPs are
* not available.
*/
self->mmap_flags |= MAP_HUGETLB | MAP_POPULATE;
self->mmap_buf_size = HUGEPAGE_SIZE * 2;
}
}
FIXTURE_TEARDOWN(iommufd_mock_domain)
{
teardown_iommufd(self->fd, _metadata);
}
FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain)
{
.mock_domains = 1,
.hugepages =
false,
.file =
false,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains)
{
.mock_domains = 2,
.hugepages =
false,
.file =
false,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_hugepage)
{
.mock_domains = 1,
.hugepages =
true,
.file =
false,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains_hugepage)
{
.mock_domains = 2,
.hugepages =
true,
.file =
false,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_file)
{
.mock_domains = 1,
.hugepages =
false,
.file =
true,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_file_hugepage)
{
.mock_domains = 1,
.hugepages =
true,
.file =
true,
};
/* Have the kernel check that the user pages made it to the iommu_domain */
#define check_mock_iova(_ptr, _iova, _length) \
({ \
struct iommu_test_cmd check_map_cmd = { \
.size =
sizeof(check_map_cmd), \
.op = IOMMU_TEST_OP_MD_CHECK_MAP, \
.id = self->hwpt_id, \
.check_map = { .iova = _iova, \
.length = _length, \
.uptr = (uintptr_t)(_ptr) }, \
}; \
ASSERT_EQ(0, \
ioctl(self->fd, \
_IOMMU_TEST_CMD(IOMMU_TEST_OP_MD_CHECK_MAP), \
&check_map_cmd)); \
if (self->hwpt_ids[1]) { \
check_map_cmd.id = self->hwpt_ids[1]; \
ASSERT_EQ(0, \
ioctl(self->fd, \
_IOMMU_TEST_CMD( \
IOMMU_TEST_OP_MD_CHECK_MAP), \
&check_map_cmd)); \
} \
})
static void
test_basic_mmap(
struct __test_metadata *_metadata,
struct _test_data_iommufd_mock_domain *self,
const struct _fixture_variant_iommufd_mock_domain *variant)
{
size_t buf_size = self->mmap_buf_size;
uint8_t *buf;
__u64 iova;
/* Simple one page map */
test_ioctl_ioas_map(buffer, PAGE_SIZE, &iova);
check_mock_iova(buffer, iova, PAGE_SIZE);
buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1,
0);
ASSERT_NE(MAP_FAILED, buf);
/* EFAULT half way through mapping */
ASSERT_EQ(0, munmap(buf + buf_size / 2, buf_size / 2));
test_err_ioctl_ioas_map(EFAULT, buf, buf_size, &iova);
/* EFAULT on first page */
ASSERT_EQ(0, munmap(buf, buf_size / 2));
test_err_ioctl_ioas_map(EFAULT, buf, buf_size, &iova);
}
static void
test_basic_file(
struct __test_metadata *_metadata,
struct _test_data_iommufd_mock_domain *self,
const struct _fixture_variant_iommufd_mock_domain *variant)
{
size_t buf_size = self->mmap_buf_size;
uint8_t *buf;
__u64 iova;
int mfd_tmp;
int prot = PROT_READ | PROT_WRITE;
/* Simple one page map */
test_ioctl_ioas_map_file(mfd, 0, PAGE_SIZE, &iova);
check_mock_iova(mfd_buffer, iova, PAGE_SIZE);
buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd_tmp);
ASSERT_NE(MAP_FAILED, buf);
test_err_ioctl_ioas_map_file(EINVAL, mfd_tmp, 0, buf_size + 1, &iova);
ASSERT_EQ(0, ftruncate(mfd_tmp, 0));
test_err_ioctl_ioas_map_file(EINVAL, mfd_tmp, 0, buf_size, &iova);
close(mfd_tmp);
}
TEST_F(iommufd_mock_domain, basic)
{
if (variant->file)
test_basic_file(_metadata, self, variant);
else
test_basic_mmap(_metadata, self, variant);
}
TEST_F(iommufd_mock_domain, ro_unshare)
{
uint8_t *buf;
__u64 iova;
int fd;
fd = open(
"/proc/self/exe", O_RDONLY);
ASSERT_NE(-1, fd);
buf = mmap(0, PAGE_SIZE, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
ASSERT_NE(MAP_FAILED, buf);
close(fd);
/*
* There have been lots of changes to the "unshare" mechanism in
* get_user_pages(), make sure it works right. The write to the page
* after we map it for reading should not change the assigned PFN.
*/
ASSERT_EQ(0,
_test_ioctl_ioas_map(self->fd, self->ioas_id, buf, PAGE_SIZE,
&iova, IOMMU_IOAS_MAP_READABLE));
check_mock_iova(buf, iova, PAGE_SIZE);
memset(buf, 1, PAGE_SIZE);
check_mock_iova(buf, iova, PAGE_SIZE);
ASSERT_EQ(0, munmap(buf, PAGE_SIZE));
}
TEST_F(iommufd_mock_domain, all_aligns)
{
size_t test_step = variant->hugepages ? (self->mmap_buf_size / 16) :
MOCK_PAGE_SIZE;
size_t buf_size = self->mmap_buf_size;
unsigned int start;
unsigned int end;
uint8_t *buf;
int prot = PROT_READ | PROT_WRITE;
int mfd = -1;
if (variant->file)
buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd);
else
buf = mmap(0, buf_size, prot, self->mmap_flags, -1, 0);
ASSERT_NE(MAP_FAILED, buf);
if (variant->file)
ASSERT_GT(mfd, 0);
check_refs(buf, buf_size, 0);
/*
* Map every combination of page size and alignment within a big region,
* less for hugepage case as it takes so long to finish.
*/
for (start = 0; start < buf_size; start += test_step) {
if (variant->hugepages)
end = buf_size;
else
end = start + MOCK_PAGE_SIZE;
for (; end < buf_size; end += MOCK_PAGE_SIZE) {
size_t length = end - start;
__u64 iova;
if (variant->file) {
test_ioctl_ioas_map_file(mfd, start, length,
&iova);
}
else {
test_ioctl_ioas_map(buf + start, length, &iova);
}
check_mock_iova(buf + start, iova, length);
check_refs(buf + start / PAGE_SIZE * PAGE_SIZE,
end / PAGE_SIZE * PAGE_SIZE -
start / PAGE_SIZE * PAGE_SIZE,
1);
test_ioctl_ioas_unmap(iova, length);
}
}
check_refs(buf, buf_size, 0);
ASSERT_EQ(0, munmap(buf, buf_size));
if (variant->file)
close(mfd);
}
TEST_F(iommufd_mock_domain, all_aligns_copy)
{
size_t test_step = variant->hugepages ? self->mmap_buf_size / 16 :
MOCK_PAGE_SIZE;
size_t buf_size = self->mmap_buf_size;
unsigned int start;
unsigned int end;
uint8_t *buf;
int prot = PROT_READ | PROT_WRITE;
int mfd = -1;
if (variant->file)
buf = memfd_mmap(buf_size, prot, MAP_SHARED, &mfd);
else
buf = mmap(0, buf_size, prot, self->mmap_flags, -1, 0);
ASSERT_NE(MAP_FAILED, buf);
if (variant->file)
ASSERT_GT(mfd, 0);
check_refs(buf, buf_size, 0);
/*
* Map every combination of page size and alignment within a big region,
* less for hugepage case as it takes so long to finish.
*/
for (start = 0; start < buf_size; start += test_step) {
if (variant->hugepages)
end = buf_size;
else
end = start + MOCK_PAGE_SIZE;
for (; end < buf_size; end += MOCK_PAGE_SIZE) {
size_t length = end - start;
unsigned int old_id;
uint32_t mock_stdev_id;
__u64 iova;
if (variant->file) {
test_ioctl_ioas_map_file(mfd, start, length,
&iova);
}
else {
test_ioctl_ioas_map(buf + start, length, &iova);
}
/* Add and destroy a domain while the area exists */
old_id = self->hwpt_ids[1];
test_cmd_mock_domain(self->ioas_id, &mock_stdev_id,
&self->hwpt_ids[1], NULL);
check_mock_iova(buf + start, iova, length);
check_refs(buf + start / PAGE_SIZE * PAGE_SIZE,
end / PAGE_SIZE * PAGE_SIZE -
start / PAGE_SIZE * PAGE_SIZE,
1);
test_ioctl_destroy(mock_stdev_id);
self->hwpt_ids[1] = old_id;
test_ioctl_ioas_unmap(iova, length);
}
}
check_refs(buf, buf_size, 0);
ASSERT_EQ(0, munmap(buf, buf_size));
if (variant->file)
close(mfd);
}
TEST_F(iommufd_mock_domain, user_copy)
{
void *buf = variant->file ? mfd_buffer : buffer;
struct iommu_test_cmd access_cmd = {
.size =
sizeof(access_cmd),
.op = IOMMU_TEST_OP_ACCESS_PAGES,
.access_pages = { .length = BUFFER_SIZE,
.uptr = (uintptr_t)buf },
};
struct iommu_ioas_copy copy_cmd = {
.size =
sizeof(copy_cmd),
.flags = IOMMU_IOAS_MAP_FIXED_IOVA | IOMMU_IOAS_MAP_WRITEABLE,
.dst_ioas_id = self->ioas_id,
.dst_iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
};
struct iommu_ioas_unmap unmap_cmd = {
.size =
sizeof(unmap_cmd),
.ioas_id = self->ioas_id,
.iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
};
unsigned int new_ioas_id, ioas_id;
/* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */
test_ioctl_ioas_alloc(&ioas_id);
if (variant->file) {
test_ioctl_ioas_map_id_file(ioas_id, mfd, 0, BUFFER_SIZE,
©_cmd.src_iova);
}
else {
test_ioctl_ioas_map_id(ioas_id, buf, BUFFER_SIZE,
©_cmd.src_iova);
}
test_cmd_create_access(ioas_id, &access_cmd.id,
MOCK_FLAGS_ACCESS_CREATE_NEEDS_PIN_PAGES);
access_cmd.access_pages.iova = copy_cmd.src_iova;
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
copy_cmd.src_ioas_id = ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE);
/* Now replace the ioas with a new one */
test_ioctl_ioas_alloc(&new_ioas_id);
if (variant->file) {
test_ioctl_ioas_map_id_file(new_ioas_id, mfd, 0, BUFFER_SIZE,
©_cmd.src_iova);
}
else {
test_ioctl_ioas_map_id(new_ioas_id, buf, BUFFER_SIZE,
©_cmd.src_iova);
}
test_cmd_access_replace_ioas(access_cmd.id, new_ioas_id);
/* Destroy the old ioas and cleanup copied mapping */
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_UNMAP, &unmap_cmd));
test_ioctl_destroy(ioas_id);
/* Then run the same test again with the new ioas */
access_cmd.access_pages.iova = copy_cmd.src_iova;
ASSERT_EQ(0,
ioctl(self->fd, _IOMMU_TEST_CMD(IOMMU_TEST_OP_ACCESS_PAGES),
&access_cmd));
copy_cmd.src_ioas_id = new_ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE);
test_cmd_destroy_access_pages(
access_cmd.id, access_cmd.access_pages.out_access_pages_id);
test_cmd_destroy_access(access_cmd.id);
test_ioctl_destroy(new_ioas_id);
}
TEST_F(iommufd_mock_domain, replace)
{
uint32_t ioas_id;
test_ioctl_ioas_alloc(&ioas_id);
test_cmd_mock_domain_replace(self->stdev_ids[0], ioas_id);
/*
* Replacing the IOAS causes the prior HWPT to be deallocated, thus we
* should get enoent when we try to use it.
*/
if (variant->mock_domains == 1)
test_err_mock_domain_replace(ENOENT, self->stdev_ids[0],
self->hwpt_ids[0]);
test_cmd_mock_domain_replace(self->stdev_ids[0], ioas_id);
if (variant->mock_domains >= 2) {
test_cmd_mock_domain_replace(self->stdev_ids[0],
self->hwpt_ids[1]);
test_cmd_mock_domain_replace(self->stdev_ids[0],
self->hwpt_ids[1]);
test_cmd_mock_domain_replace(self->stdev_ids[0],
self->hwpt_ids[0]);
}
test_cmd_mock_domain_replace(self->stdev_ids[0], self->ioas_id);
test_ioctl_destroy(ioas_id);
}
TEST_F(iommufd_mock_domain, alloc_hwpt)
{
int i;
for (i = 0; i != variant->mock_domains; i++) {
uint32_t hwpt_id[2];
uint32_t stddev_id;
test_err_hwpt_alloc(EOPNOTSUPP,
self->idev_ids[i], self->ioas_id,
~IOMMU_HWPT_ALLOC_NEST_PARENT, &hwpt_id[0]);
test_cmd_hwpt_alloc(self->idev_ids[i], self->ioas_id,
0, &hwpt_id[0]);
test_cmd_hwpt_alloc(self->idev_ids[i], self->ioas_id,
IOMMU_HWPT_ALLOC_NEST_PARENT, &hwpt_id[1]);
/* Do a hw_pagetable rotation test */
test_cmd_mock_domain_replace(self->stdev_ids[i], hwpt_id[0]);
EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, hwpt_id[0]));
test_cmd_mock_domain_replace(self->stdev_ids[i], hwpt_id[1]);
EXPECT_ERRNO(EBUSY, _test_ioctl_destroy(self->fd, hwpt_id[1]));
test_cmd_mock_domain_replace(self->stdev_ids[i], self->ioas_id);
test_ioctl_destroy(hwpt_id[1]);
test_cmd_mock_domain(hwpt_id[0], &stddev_id, NULL, NULL);
test_ioctl_destroy(stddev_id);
test_ioctl_destroy(hwpt_id[0]);
}
}
FIXTURE(iommufd_dirty_tracking)
{
int fd;
uint32_t ioas_id;
uint32_t hwpt_id;
uint32_t stdev_id;
uint32_t idev_id;
unsigned long page_size;
unsigned long bitmap_size;
void *bitmap;
void *buffer;
};
FIXTURE_VARIANT(iommufd_dirty_tracking)
{
unsigned long buffer_size;
bool hugepages;
};
FIXTURE_SETUP(iommufd_dirty_tracking)
{
size_t mmap_buffer_size;
unsigned long size;
int mmap_flags;
void *vrc;
int rc;
if (variant->buffer_size < MOCK_PAGE_SIZE) {
SKIP(
return,
"Skipping buffer_size=%lu, less than MOCK_PAGE_SIZE=%lu",
variant->buffer_size, MOCK_PAGE_SIZE);
}
self->fd = open(
"/dev/iommu", O_RDWR);
ASSERT_NE(-1, self->fd);
mmap_flags = MAP_SHARED | MAP_ANONYMOUS | MAP_FIXED;
mmap_buffer_size = variant->buffer_size;
if (variant->hugepages) {
/*
* MAP_POPULATE will cause the kernel to fail mmap if THPs are
* not available.
*/
mmap_flags |= MAP_HUGETLB | MAP_POPULATE;
/*
* Allocation must be aligned to the HUGEPAGE_SIZE, because the
* following mmap() will automatically align the length to be a
* multiple of the underlying huge page size. Failing to do the
* same at this allocation will result in a memory overwrite by
* the mmap().
*/
if (mmap_buffer_size < HUGEPAGE_SIZE)
mmap_buffer_size = HUGEPAGE_SIZE;
}
rc = posix_memalign(&self->buffer, HUGEPAGE_SIZE, mmap_buffer_size);
if (rc || !self->buffer) {
SKIP(
return,
"Skipping buffer_size=%lu due to errno=%d",
mmap_buffer_size, rc);
}
assert((uintptr_t)self->buffer % HUGEPAGE_SIZE == 0);
vrc = mmap(self->buffer, mmap_buffer_size, PROT_READ | PROT_WRITE,
mmap_flags, -1, 0);
assert(vrc == self->buffer);
self->page_size = MOCK_PAGE_SIZE;
self->bitmap_size = variant->buffer_size / self->page_size;
/* Provision with an extra (PAGE_SIZE) for the unaligned case */
size = DIV_ROUND_UP(self->bitmap_size, BITS_PER_BYTE);
rc = posix_memalign(&self->bitmap, PAGE_SIZE, size + PAGE_SIZE);
assert(!rc);
assert(self->bitmap);
assert((uintptr_t)self->bitmap % PAGE_SIZE == 0);
test_ioctl_ioas_alloc(&self->ioas_id);
/* Enable 1M mock IOMMU hugepages */
if (variant->hugepages) {
test_cmd_mock_domain_flags(self->ioas_id,
MOCK_FLAGS_DEVICE_HUGE_IOVA,
&self->stdev_id, &self->hwpt_id,
&self->idev_id);
}
else {
test_cmd_mock_domain(self->ioas_id, &self->stdev_id,
&self->hwpt_id, &self->idev_id);
}
}
FIXTURE_TEARDOWN(iommufd_dirty_tracking)
{
free(self->buffer);
free(self->bitmap);
teardown_iommufd(self->fd, _metadata);
}
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty8k)
{
/* half of an u8 index bitmap */
.buffer_size = 8UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty16k)
{
/* one u8 index bitmap */
.buffer_size = 16UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty64k)
{
/* one u32 index bitmap */
.buffer_size = 64UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty128k)
{
/* one u64 index bitmap */
.buffer_size = 128UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty320k)
{
/* two u64 index and trailing end bitmap */
.buffer_size = 320UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty64M)
{
/* 4K bitmap (64M IOVA range) */
.buffer_size = 64UL * 1024UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty64M_huge)
{
/* 4K bitmap (64M IOVA range) */
.buffer_size = 64UL * 1024UL * 1024UL,
.hugepages =
true,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty128M)
{
/* 8K bitmap (128M IOVA range) */
.buffer_size = 128UL * 1024UL * 1024UL,
};
FIXTURE_VARIANT_ADD(iommufd_dirty_tracking, domain_dirty128M_huge)
{
/* 8K bitmap (128M IOVA range) */
.buffer_size = 128UL * 1024UL * 1024UL,
.hugepages =
true,
};
TEST_F(iommufd_dirty_tracking, enforce_dirty)
{
uint32_t ioas_id, stddev_id, idev_id;
uint32_t hwpt_id, _hwpt_id;
uint32_t dev_flags;
/* Regular case */
dev_flags = MOCK_FLAGS_DEVICE_NO_DIRTY;
test_cmd_hwpt_alloc(self->idev_id, self->ioas_id,
IOMMU_HWPT_ALLOC_DIRTY_TRACKING, &hwpt_id);
test_cmd_mock_domain(hwpt_id, &stddev_id, NULL, NULL);
test_err_mock_domain_flags(EINVAL, hwpt_id, dev_flags, &stddev_id,
NULL);
test_ioctl_destroy(stddev_id);
test_ioctl_destroy(hwpt_id);
/* IOMMU device does not support dirty tracking */
test_ioctl_ioas_alloc(&ioas_id);
test_cmd_mock_domain_flags(ioas_id, dev_flags, &stddev_id, &_hwpt_id,
&idev_id);
test_err_hwpt_alloc(EOPNOTSUPP, idev_id, ioas_id,
IOMMU_HWPT_ALLOC_DIRTY_TRACKING, &hwpt_id);
test_ioctl_destroy(stddev_id);
}
TEST_F(iommufd_dirty_tracking, set_dirty_tracking)
{
uint32_t stddev_id;
uint32_t hwpt_id;
test_cmd_hwpt_alloc(self->idev_id, self->ioas_id,
IOMMU_HWPT_ALLOC_DIRTY_TRACKING, &hwpt_id);
test_cmd_mock_domain(hwpt_id, &stddev_id, NULL, NULL);
test_cmd_set_dirty_tracking(hwpt_id,
true);
test_cmd_set_dirty_tracking(hwpt_id,
false);
test_ioctl_destroy(stddev_id);
test_ioctl_destroy(hwpt_id);
}
TEST_F(iommufd_dirty_tracking, device_dirty_capability)
{
uint32_t caps = 0;
uint32_t stddev_id;
uint32_t hwpt_id;
test_cmd_hwpt_alloc(self->idev_id, self->ioas_id, 0, &hwpt_id);
test_cmd_mock_domain(hwpt_id, &stddev_id, NULL, NULL);
test_cmd_get_hw_capabilities(self->idev_id, caps);
ASSERT_EQ(IOMMU_HW_CAP_DIRTY_TRACKING,
caps & IOMMU_HW_CAP_DIRTY_TRACKING);
test_ioctl_destroy(stddev_id);
test_ioctl_destroy(hwpt_id);
}
TEST_F(iommufd_dirty_tracking, get_dirty_bitmap)
{
uint32_t page_size = MOCK_PAGE_SIZE;
uint32_t hwpt_id;
uint32_t ioas_id;
if (variant->hugepages)
page_size = MOCK_HUGE_PAGE_SIZE;
test_ioctl_ioas_alloc(&ioas_id);
test_ioctl_ioas_map_fixed_id(ioas_id, self->buffer,
variant->buffer_size, MOCK_APERTURE_START);
test_cmd_hwpt_alloc(self->idev_id, ioas_id,
IOMMU_HWPT_ALLOC_DIRTY_TRACKING, &hwpt_id);
test_cmd_set_dirty_tracking(hwpt_id,
true);
test_mock_dirty_bitmaps(hwpt_id, variant->buffer_size,
MOCK_APERTURE_START, self->page_size, page_size,
self->bitmap, self->bitmap_size, 0, _metadata);
/* PAGE_SIZE unaligned bitmap */
--> --------------------
--> maximum size reached
--> --------------------
