Add test cases to exercise IOMMU_IOAS_MAP_FILE.
Signed-off-by: Steve Sistare <steven.sistare@xxxxxxxxxx>
Reviewed-by: Nicolin Chen <nicolinc@xxxxxxxxxx>
---
tools/testing/selftests/iommu/iommufd.c | 127 ++++++++++++++++++++---
tools/testing/selftests/iommu/iommufd_fail_nth.c | 39 +++++++
tools/testing/selftests/iommu/iommufd_utils.h | 57 ++++++++++
3 files changed, 208 insertions(+), 15 deletions(-)
diff --git a/tools/testing/selftests/iommu/iommufd.c b/tools/testing/selftests/iommu/iommufd.c
index 4927b9a..e379adf 100644
--- a/tools/testing/selftests/iommu/iommufd.c
+++ b/tools/testing/selftests/iommu/iommufd.c
@@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2021-2022, NVIDIA CORPORATION & AFFILIATES */
+#include <asm/unistd.h>
#include <stdlib.h>
#include <sys/mman.h>
#include <sys/eventfd.h>
@@ -49,6 +50,9 @@ static __attribute__((constructor)) void setup_sizes(void)
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);
}
FIXTURE(iommufd)
@@ -128,6 +132,7 @@ static __attribute__((constructor)) void setup_sizes(void)
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);
#undef TEST_LENGTH
}
@@ -1372,6 +1377,7 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
{
unsigned int mock_domains;
bool hugepages;
+ bool file;
};
FIXTURE_SETUP(iommufd_mock_domain)
@@ -1410,26 +1416,45 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
{
.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) \
({ \
@@ -1455,7 +1480,10 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
} \
})
-TEST_F(iommufd_mock_domain, basic)
+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;
@@ -1478,6 +1506,43 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
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);
+
+ /* EFAULT half way through mapping */
+ ASSERT_EQ(0, munmap(buf + buf_size / 2, buf_size / 2));
+ test_err_ioctl_ioas_map_file(EFAULT, 0, buf_size, &iova);
+
+ /* EFAULT on first page */
+ ASSERT_EQ(0, munmap(buf, buf_size / 2));
+ test_err_ioctl_ioas_map_file(EFAULT, 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;
@@ -1513,9 +1578,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
unsigned int start;
unsigned int end;
uint8_t *buf;
+ int prot = PROT_READ | PROT_WRITE;
+ int mfd;
- buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1,
- 0);
+ 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);
check_refs(buf, buf_size, 0);
@@ -1532,7 +1601,12 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
size_t length = end - start;
__u64 iova;
- test_ioctl_ioas_map(buf + start, length, &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 -
@@ -1544,6 +1618,8 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
}
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)
@@ -1554,9 +1630,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
unsigned int start;
unsigned int end;
uint8_t *buf;
+ int prot = PROT_READ | PROT_WRITE;
+ int mfd;
- buf = mmap(0, buf_size, PROT_READ | PROT_WRITE, self->mmap_flags, -1,
- 0);
+ 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);
check_refs(buf, buf_size, 0);
@@ -1575,7 +1655,12 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
uint32_t mock_stdev_id;
__u64 iova;
- test_ioctl_ioas_map(buf + start, length, &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];
@@ -1596,15 +1681,18 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
}
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)buffer },
+ .uptr = (uintptr_t)buf },
};
struct iommu_ioas_copy copy_cmd = {
.size = sizeof(copy_cmd),
@@ -1623,9 +1711,13 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
/* 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,
- ©_cmd.src_iova);
-
+ 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);
@@ -1635,12 +1727,17 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
&access_cmd));
copy_cmd.src_ioas_id = ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
- check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE);
+ check_mock_iova(buf, MOCK_APERTURE_START, BUFFER_SIZE);
/* Now replace the ioas with a new one */
test_ioctl_ioas_alloc(&new_ioas_id);
- test_ioctl_ioas_map_id(new_ioas_id, buffer, BUFFER_SIZE,
- ©_cmd.src_iova);
+ 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 */
@@ -1654,7 +1751,7 @@ static void check_access_rw(struct __test_metadata *_metadata, int fd,
&access_cmd));
copy_cmd.src_ioas_id = new_ioas_id;
ASSERT_EQ(0, ioctl(self->fd, IOMMU_IOAS_COPY, ©_cmd));
- check_mock_iova(buffer, MOCK_APERTURE_START, BUFFER_SIZE);
+ 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);
diff --git a/tools/testing/selftests/iommu/iommufd_fail_nth.c b/tools/testing/selftests/iommu/iommufd_fail_nth.c
index c5d5e69..2d7d016 100644
--- a/tools/testing/selftests/iommu/iommufd_fail_nth.c
+++ b/tools/testing/selftests/iommu/iommufd_fail_nth.c
@@ -47,6 +47,9 @@ static __attribute__((constructor)) void setup_buffer(void)
buffer = mmap(0, BUFFER_SIZE, PROT_READ | PROT_WRITE,
MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+
+ mfd_buffer = memfd_mmap(BUFFER_SIZE, PROT_READ | PROT_WRITE, MAP_SHARED,
+ &mfd);
}
/*
@@ -331,6 +334,42 @@ void __fail_nth_enable(struct __test_metadata *_metadata,
return 0;
}
+/* iopt_area_fill_domains() and iopt_area_fill_domain() */
+TEST_FAIL_NTH(basic_fail_nth, map_file_domain)
+{
+ uint32_t ioas_id;
+ __u32 stdev_id;
+ __u32 hwpt_id;
+ __u64 iova;
+
+ self->fd = open("/dev/iommu", O_RDWR);
+ if (self->fd == -1)
+ return -1;
+
+ if (_test_ioctl_ioas_alloc(self->fd, &ioas_id))
+ return -1;
+
+ if (_test_ioctl_set_temp_memory_limit(self->fd, 32))
+ return -1;
+
+ fail_nth_enable();
+
+ if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, &hwpt_id, NULL))
+ return -1;
+
+ if (_test_ioctl_ioas_map_file(self->fd, ioas_id, mfd, 0, 262144, &iova,
+ IOMMU_IOAS_MAP_WRITEABLE |
+ IOMMU_IOAS_MAP_READABLE))
+ return -1;
+
+ if (_test_ioctl_destroy(self->fd, stdev_id))
+ return -1;
+
+ if (_test_cmd_mock_domain(self->fd, ioas_id, &stdev_id, &hwpt_id, NULL))
+ return -1;
+ return 0;
+}
+
TEST_FAIL_NTH(basic_fail_nth, map_two_domains)
{
uint32_t ioas_id;
diff --git a/tools/testing/selftests/iommu/iommufd_utils.h b/tools/testing/selftests/iommu/iommufd_utils.h
index 40f6f14..6a11c26 100644
--- a/tools/testing/selftests/iommu/iommufd_utils.h
+++ b/tools/testing/selftests/iommu/iommufd_utils.h
@@ -40,12 +40,28 @@ static inline bool test_bit(unsigned int nr, unsigned long *addr)
static void *buffer;
static unsigned long BUFFER_SIZE;
+static void *mfd_buffer;
+static int mfd;
+
static unsigned long PAGE_SIZE;
#define sizeof_field(TYPE, MEMBER) sizeof((((TYPE *)0)->MEMBER))
#define offsetofend(TYPE, MEMBER) \
(offsetof(TYPE, MEMBER) + sizeof_field(TYPE, MEMBER))
+static inline void *memfd_mmap(size_t length, int prot, int flags, int *mfd_p)
+{
+ int mfd_flags = (flags & MAP_HUGETLB) ? MFD_HUGETLB : 0;
+ int mfd = memfd_create("buffer", mfd_flags);
+
+ if (mfd <= 0)
+ return MAP_FAILED;
+ if (ftruncate(mfd, length))
+ return MAP_FAILED;
+ *mfd_p = mfd;
+ return mmap(0, length, prot, flags, mfd, 0);
+}
+
/*
* Have the kernel check the refcount on pages. I don't know why a freshly
* mmap'd anon non-compound page starts out with a ref of 3
@@ -589,6 +605,47 @@ static int _test_ioctl_ioas_unmap(int fd, unsigned int ioas_id, uint64_t iova,
EXPECT_ERRNO(_errno, _test_ioctl_ioas_unmap(self->fd, self->ioas_id, \
iova, length, NULL))
+static int _test_ioctl_ioas_map_file(int fd, unsigned int ioas_id, int mfd,
+ size_t start, size_t length, __u64 *iova,
+ unsigned int flags)
+{
+ struct iommu_ioas_map_file cmd = {
+ .size = sizeof(cmd),
+ .flags = flags,
+ .ioas_id = ioas_id,
+ .fd = mfd,
+ .start = start,
+ .length = length,
+ };
+ int ret;
+
+ if (flags & IOMMU_IOAS_MAP_FIXED_IOVA)
+ cmd.iova = *iova;
+
+ ret = ioctl(fd, IOMMU_IOAS_MAP_FILE, &cmd);
+ *iova = cmd.iova;
+ return ret;
+}
+
+#define test_ioctl_ioas_map_file(mfd, start, length, iova_p) \
+ ASSERT_EQ(0, \
+ _test_ioctl_ioas_map_file( \
+ self->fd, self->ioas_id, mfd, start, length, iova_p, \
+ IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE))
+
+#define test_err_ioctl_ioas_map_file(_errno, mfd, start, length, iova_p) \
+ EXPECT_ERRNO( \
+ _errno, \
+ _test_ioctl_ioas_map_file( \
+ self->fd, self->ioas_id, mfd, start, length, iova_p, \
+ IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE))
+
+#define test_ioctl_ioas_map_id_file(ioas_id, mfd, start, length, iova_p) \
+ ASSERT_EQ(0, \
+ _test_ioctl_ioas_map_file( \
+ self->fd, ioas_id, mfd, start, length, iova_p, \
+ IOMMU_IOAS_MAP_WRITEABLE | IOMMU_IOAS_MAP_READABLE))
+
static int _test_ioctl_set_temp_memory_limit(int fd, unsigned int limit)
{
struct iommu_test_cmd memlimit_cmd = {
