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linux-zen-desktop/tools/testing/selftests/iommu/iommufd.c

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// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/eventfd.h>
#define __EXPORTED_HEADERS__
#include <linux/vfio.h>
#include "iommufd_utils.h"
static void *buffer;
static unsigned long PAGE_SIZE;
static unsigned long HUGEPAGE_SIZE;
#define MOCK_PAGE_SIZE (PAGE_SIZE / 2)
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);
}
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) \
{ \
struct { \
struct _struct cmd; \
uint8_t extra; \
} cmd = { .cmd = { .size = sizeof(struct _struct) - 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);
TEST_LENGTH(iommu_ioas_alloc, IOMMU_IOAS_ALLOC);
TEST_LENGTH(iommu_ioas_iova_ranges, IOMMU_IOAS_IOVA_RANGES);
TEST_LENGTH(iommu_ioas_allow_iovas, IOMMU_IOAS_ALLOW_IOVAS);
TEST_LENGTH(iommu_ioas_map, IOMMU_IOAS_MAP);
TEST_LENGTH(iommu_ioas_copy, IOMMU_IOAS_COPY);
TEST_LENGTH(iommu_ioas_unmap, IOMMU_IOAS_UNMAP);
TEST_LENGTH(iommu_option, IOMMU_OPTION);
TEST_LENGTH(iommu_vfio_ioas, IOMMU_VFIO_IOAS);
#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));
}
FIXTURE(iommufd_ioas)
{
int fd;
uint32_t ioas_id;
uint32_t domain_id;
uint64_t base_iova;
};
FIXTURE_VARIANT(iommufd_ioas)
{
unsigned int mock_domains;
unsigned int memory_limit;
};
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, NULL, &self->domain_id);
self->base_iova = MOCK_APERTURE_START;
}
}
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,
};
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->domain_id) {
/* IOAS cannot be freed while a domain is on 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, 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->domain_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, 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->domain_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->domain_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));
}
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,
.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, &copy_cmd));
/* Copy between IOAS's */
copy_cmd.src_iova = self->base_iova;
copy_cmd.dst_iova = 0;
test_ioctl_ioas_alloc(&copy_cmd.dst_ioas_id);
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, &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->domain_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->domain_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->domain_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_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_device_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_device_id,
&mock_hwpt_id);
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_device_id);
test_ioctl_destroy(mock_hwpt_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->domain_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);
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);
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,
.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,
&copy_cmd));
} else {
ASSERT_EQ(0,
ioctl(self->fd, IOMMU_IOAS_COPY, &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 domain_id;
uint32_t domain_ids[2];
int mmap_flags;
size_t mmap_buf_size;
};
FIXTURE_VARIANT(iommufd_mock_domain)
{
unsigned int mock_domains;
bool hugepages;
};
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->domain_ids), variant->mock_domains);
for (i = 0; i != variant->mock_domains; i++)
test_cmd_mock_domain(self->ioas_id, NULL, &self->domain_ids[i]);
self->domain_id = self->domain_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,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains)
{
.mock_domains = 2,
.hugepages = false,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, one_domain_hugepage)
{
.mock_domains = 1,
.hugepages = true,
};
FIXTURE_VARIANT_ADD(iommufd_mock_domain, two_domains_hugepage)
{
.mock_domains = 2,
.hugepages = 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->domain_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->domain_ids[1]) { \
check_map_cmd.id = self->domain_ids[1]; \
ASSERT_EQ(0, \
ioctl(self->fd, \
_IOMMU_TEST_CMD( \
IOMMU_TEST_OP_MD_CHECK_MAP), \
&check_map_cmd)); \
} \
})
TEST_F(iommufd_mock_domain, basic)
{
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);
}
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;
buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1,
0);
ASSERT_NE(MAP_FAILED, buf);
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;
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));
}
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;
buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1,
0);
ASSERT_NE(MAP_FAILED, buf);
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_device_id;
__u64 iova;
test_ioctl_ioas_map(buf + start, length, &iova);
/* Add and destroy a domain while the area exists */
old_id = self->domain_ids[1];
test_cmd_mock_domain(self->ioas_id, &mock_device_id,
&self->domain_ids[1]);
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_device_id);
test_ioctl_destroy(self->domain_ids[1]);
self->domain_ids[1] = old_id;
test_ioctl_ioas_unmap(iova, length);
}
}
check_refs(buf, buf_size, 0);
ASSERT_EQ(0, munmap(buf, buf_size));
}
TEST_F(iommufd_mock_domain, user_copy)
{
struct iommu_test_cmd access_cmd = {
.size = sizeof(access_cmd),
.op = IOMMU_TEST_OP_ACCESS_PAGES,
.access_pages = { .length = BUFFER_SIZE,
.uptr = (uintptr_t)buffer },
};
struct iommu_ioas_copy copy_cmd = {
.size = sizeof(copy_cmd),
.flags = IOMMU_IOAS_MAP_FIXED_IOVA,
.dst_ioas_id = self->ioas_id,
.dst_iova = MOCK_APERTURE_START,
.length = BUFFER_SIZE,
};
unsigned int ioas_id;
/* Pin the pages in an IOAS with no domains then copy to an IOAS with domains */
test_ioctl_ioas_alloc(&ioas_id);
test_ioctl_ioas_map_id(ioas_id, buffer, BUFFER_SIZE,
&copy_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, &copy_cmd));
check_mock_iova(buffer, 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(ioas_id);
}
/* VFIO compatibility IOCTLs */
TEST_F(iommufd, simple_ioctls)
{
ASSERT_EQ(VFIO_API_VERSION, ioctl(self->fd, VFIO_GET_API_VERSION));
ASSERT_EQ(1, ioctl(self->fd, VFIO_CHECK_EXTENSION, VFIO_TYPE1v2_IOMMU));
}
TEST_F(iommufd, unmap_cmd)
{
struct vfio_iommu_type1_dma_unmap unmap_cmd = {
.iova = MOCK_APERTURE_START,
.size = PAGE_SIZE,
};
unmap_cmd.argsz = 1;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
unmap_cmd.argsz = sizeof(unmap_cmd);
unmap_cmd.flags = 1 << 31;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
unmap_cmd.flags = 0;
EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
}
TEST_F(iommufd, map_cmd)
{
struct vfio_iommu_type1_dma_map map_cmd = {
.iova = MOCK_APERTURE_START,
.size = PAGE_SIZE,
.vaddr = (__u64)buffer,
};
map_cmd.argsz = 1;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
map_cmd.argsz = sizeof(map_cmd);
map_cmd.flags = 1 << 31;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
/* Requires a domain to be attached */
map_cmd.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE;
EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
}
TEST_F(iommufd, info_cmd)
{
struct vfio_iommu_type1_info info_cmd = {};
/* Invalid argsz */
info_cmd.argsz = 1;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_GET_INFO, &info_cmd));
info_cmd.argsz = sizeof(info_cmd);
EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_IOMMU_GET_INFO, &info_cmd));
}
TEST_F(iommufd, set_iommu_cmd)
{
/* Requires a domain to be attached */
EXPECT_ERRNO(ENODEV,
ioctl(self->fd, VFIO_SET_IOMMU, VFIO_TYPE1v2_IOMMU));
EXPECT_ERRNO(ENODEV, ioctl(self->fd, VFIO_SET_IOMMU, VFIO_TYPE1_IOMMU));
}
TEST_F(iommufd, vfio_ioas)
{
struct iommu_vfio_ioas vfio_ioas_cmd = {
.size = sizeof(vfio_ioas_cmd),
.op = IOMMU_VFIO_IOAS_GET,
};
__u32 ioas_id;
/* ENODEV if there is no compat ioas */
EXPECT_ERRNO(ENODEV, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
/* Invalid id for set */
vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_SET;
EXPECT_ERRNO(ENOENT, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
/* Valid id for set*/
test_ioctl_ioas_alloc(&ioas_id);
vfio_ioas_cmd.ioas_id = ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
/* Same id comes back from get */
vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_GET;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
ASSERT_EQ(ioas_id, vfio_ioas_cmd.ioas_id);
/* Clear works */
vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_CLEAR;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
vfio_ioas_cmd.op = IOMMU_VFIO_IOAS_GET;
EXPECT_ERRNO(ENODEV, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
}
FIXTURE(vfio_compat_mock_domain)
{
int fd;
uint32_t ioas_id;
};
FIXTURE_VARIANT(vfio_compat_mock_domain)
{
unsigned int version;
};
FIXTURE_SETUP(vfio_compat_mock_domain)
{
struct iommu_vfio_ioas vfio_ioas_cmd = {
.size = sizeof(vfio_ioas_cmd),
.op = IOMMU_VFIO_IOAS_SET,
};
self->fd = open("/dev/iommu", O_RDWR);
ASSERT_NE(-1, self->fd);
/* Create what VFIO would consider a group */
test_ioctl_ioas_alloc(&self->ioas_id);
test_cmd_mock_domain(self->ioas_id, NULL, NULL);
/* Attach it to the vfio compat */
vfio_ioas_cmd.ioas_id = self->ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_VFIO_IOAS, &vfio_ioas_cmd));
ASSERT_EQ(0, ioctl(self->fd, VFIO_SET_IOMMU, variant->version));
}
FIXTURE_TEARDOWN(vfio_compat_mock_domain)
{
teardown_iommufd(self->fd, _metadata);
}
FIXTURE_VARIANT_ADD(vfio_compat_mock_domain, Ver1v2)
{
.version = VFIO_TYPE1v2_IOMMU,
};
FIXTURE_VARIANT_ADD(vfio_compat_mock_domain, Ver1v0)
{
.version = VFIO_TYPE1_IOMMU,
};
TEST_F(vfio_compat_mock_domain, simple_close)
{
}
TEST_F(vfio_compat_mock_domain, 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));
if (variant->version == VFIO_TYPE1_IOMMU) {
ASSERT_EQ(0, cmd.val64);
} else {
ASSERT_EQ(1, cmd.val64);
}
}
/*
* Execute an ioctl command stored in buffer and check that the result does not
* overflow memory.
*/
static bool is_filled(const void *buf, uint8_t c, size_t len)
{
const uint8_t *cbuf = buf;
for (; len; cbuf++, len--)
if (*cbuf != c)
return false;
return true;
}
#define ioctl_check_buf(fd, cmd) \
({ \
size_t _cmd_len = *(__u32 *)buffer; \
\
memset(buffer + _cmd_len, 0xAA, BUFFER_SIZE - _cmd_len); \
ASSERT_EQ(0, ioctl(fd, cmd, buffer)); \
ASSERT_EQ(true, is_filled(buffer + _cmd_len, 0xAA, \
BUFFER_SIZE - _cmd_len)); \
})
static void check_vfio_info_cap_chain(struct __test_metadata *_metadata,
struct vfio_iommu_type1_info *info_cmd)
{
const struct vfio_info_cap_header *cap;
ASSERT_GE(info_cmd->argsz, info_cmd->cap_offset + sizeof(*cap));
cap = buffer + info_cmd->cap_offset;
while (true) {
size_t cap_size;
if (cap->next)
cap_size = (buffer + cap->next) - (void *)cap;
else
cap_size = (buffer + info_cmd->argsz) - (void *)cap;
switch (cap->id) {
case VFIO_IOMMU_TYPE1_INFO_CAP_IOVA_RANGE: {
struct vfio_iommu_type1_info_cap_iova_range *data =
(void *)cap;
ASSERT_EQ(1, data->header.version);
ASSERT_EQ(1, data->nr_iovas);
EXPECT_EQ(MOCK_APERTURE_START,
data->iova_ranges[0].start);
EXPECT_EQ(MOCK_APERTURE_LAST, data->iova_ranges[0].end);
break;
}
case VFIO_IOMMU_TYPE1_INFO_DMA_AVAIL: {
struct vfio_iommu_type1_info_dma_avail *data =
(void *)cap;
ASSERT_EQ(1, data->header.version);
ASSERT_EQ(sizeof(*data), cap_size);
break;
}
default:
ASSERT_EQ(false, true);
break;
}
if (!cap->next)
break;
ASSERT_GE(info_cmd->argsz, cap->next + sizeof(*cap));
ASSERT_GE(buffer + cap->next, (void *)cap);
cap = buffer + cap->next;
}
}
TEST_F(vfio_compat_mock_domain, get_info)
{
struct vfio_iommu_type1_info *info_cmd = buffer;
unsigned int i;
size_t caplen;
/* Pre-cap ABI */
*info_cmd = (struct vfio_iommu_type1_info){
.argsz = offsetof(struct vfio_iommu_type1_info, cap_offset),
};
ioctl_check_buf(self->fd, VFIO_IOMMU_GET_INFO);
ASSERT_NE(0, info_cmd->iova_pgsizes);
ASSERT_EQ(VFIO_IOMMU_INFO_PGSIZES | VFIO_IOMMU_INFO_CAPS,
info_cmd->flags);
/* Read the cap chain size */
*info_cmd = (struct vfio_iommu_type1_info){
.argsz = sizeof(*info_cmd),
};
ioctl_check_buf(self->fd, VFIO_IOMMU_GET_INFO);
ASSERT_NE(0, info_cmd->iova_pgsizes);
ASSERT_EQ(VFIO_IOMMU_INFO_PGSIZES | VFIO_IOMMU_INFO_CAPS,
info_cmd->flags);
ASSERT_EQ(0, info_cmd->cap_offset);
ASSERT_LT(sizeof(*info_cmd), info_cmd->argsz);
/* Read the caps, kernel should never create a corrupted caps */
caplen = info_cmd->argsz;
for (i = sizeof(*info_cmd); i < caplen; i++) {
*info_cmd = (struct vfio_iommu_type1_info){
.argsz = i,
};
ioctl_check_buf(self->fd, VFIO_IOMMU_GET_INFO);
ASSERT_EQ(VFIO_IOMMU_INFO_PGSIZES | VFIO_IOMMU_INFO_CAPS,
info_cmd->flags);
if (!info_cmd->cap_offset)
continue;
check_vfio_info_cap_chain(_metadata, info_cmd);
}
}
static void shuffle_array(unsigned long *array, size_t nelms)
{
unsigned int i;
/* Shuffle */
for (i = 0; i != nelms; i++) {
unsigned long tmp = array[i];
unsigned int other = rand() % (nelms - i);
array[i] = array[other];
array[other] = tmp;
}
}
TEST_F(vfio_compat_mock_domain, map)
{
struct vfio_iommu_type1_dma_map map_cmd = {
.argsz = sizeof(map_cmd),
.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE,
.vaddr = (uintptr_t)buffer,
.size = BUFFER_SIZE,
.iova = MOCK_APERTURE_START,
};
struct vfio_iommu_type1_dma_unmap unmap_cmd = {
.argsz = sizeof(unmap_cmd),
.size = BUFFER_SIZE,
.iova = MOCK_APERTURE_START,
};
unsigned long pages_iova[BUFFER_SIZE / PAGE_SIZE];
unsigned int i;
/* Simple map/unmap */
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
ASSERT_EQ(BUFFER_SIZE, unmap_cmd.size);
/* UNMAP_FLAG_ALL requres 0 iova/size */
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
unmap_cmd.flags = VFIO_DMA_UNMAP_FLAG_ALL;
EXPECT_ERRNO(EINVAL, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
unmap_cmd.iova = 0;
unmap_cmd.size = 0;
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
ASSERT_EQ(BUFFER_SIZE, unmap_cmd.size);
/* Small pages */
for (i = 0; i != ARRAY_SIZE(pages_iova); i++) {
map_cmd.iova = pages_iova[i] =
MOCK_APERTURE_START + i * PAGE_SIZE;
map_cmd.vaddr = (uintptr_t)buffer + i * PAGE_SIZE;
map_cmd.size = PAGE_SIZE;
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
}
shuffle_array(pages_iova, ARRAY_SIZE(pages_iova));
unmap_cmd.flags = 0;
unmap_cmd.size = PAGE_SIZE;
for (i = 0; i != ARRAY_SIZE(pages_iova); i++) {
unmap_cmd.iova = pages_iova[i];
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA, &unmap_cmd));
}
}
TEST_F(vfio_compat_mock_domain, huge_map)
{
size_t buf_size = HUGEPAGE_SIZE * 2;
struct vfio_iommu_type1_dma_map map_cmd = {
.argsz = sizeof(map_cmd),
.flags = VFIO_DMA_MAP_FLAG_READ | VFIO_DMA_MAP_FLAG_WRITE,
.size = buf_size,
.iova = MOCK_APERTURE_START,
};
struct vfio_iommu_type1_dma_unmap unmap_cmd = {
.argsz = sizeof(unmap_cmd),
};
unsigned long pages_iova[16];
unsigned int i;
void *buf;
/* Test huge pages and splitting */
buf = mmap(0, buf_size, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS | MAP_HUGETLB | MAP_POPULATE, -1,
0);
ASSERT_NE(MAP_FAILED, buf);
map_cmd.vaddr = (uintptr_t)buf;
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_MAP_DMA, &map_cmd));
unmap_cmd.size = buf_size / ARRAY_SIZE(pages_iova);
for (i = 0; i != ARRAY_SIZE(pages_iova); i++)
pages_iova[i] = MOCK_APERTURE_START + (i * unmap_cmd.size);
shuffle_array(pages_iova, ARRAY_SIZE(pages_iova));
/* type1 mode can cut up larger mappings, type1v2 always fails */
for (i = 0; i != ARRAY_SIZE(pages_iova); i++) {
unmap_cmd.iova = pages_iova[i];
unmap_cmd.size = buf_size / ARRAY_SIZE(pages_iova);
if (variant->version == VFIO_TYPE1_IOMMU) {
ASSERT_EQ(0, ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA,
&unmap_cmd));
} else {
EXPECT_ERRNO(ENOENT,
ioctl(self->fd, VFIO_IOMMU_UNMAP_DMA,
&unmap_cmd));
}
}
}
TEST_HARNESS_MAIN
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