vfio: selftests: Move vfio dma mapping test to their own file

Move the dma_map_unmap test from vfio_pci_device_test to a new test:
vfio_dma_mapping_test. We are going to add more complex dma mapping
tests, so it makes sense to separate this from the vfio pci device
test which is more of a sanity check for vfio pci functionality.

Signed-off-by: Josh Hilke <jrhilke@google.com>
Acked-by: Shuah Khan <skhan@linuxfoundation.org>
Signed-off-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20250822212518.4156428-6-dmatlack@google.com
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>

diff --git a/tools/testing/selftests/vfio/Makefile b/tools/testing/selftests/vfio/Makefile
index e4a5d6eadff394ea3ff9d7a693876ee84fa053e5..05c5a585cca69316485c76989c51bcb2da904688 100644 (file)
--- a/tools/testing/selftests/vfio/Makefile
+++ b/tools/testing/selftests/vfio/Makefile
@@ -1,4 +1,5 @@
 CFLAGS = $(KHDR_INCLUDES)
+TEST_GEN_PROGS += vfio_dma_mapping_test
 TEST_GEN_PROGS += vfio_iommufd_setup_test
 TEST_GEN_PROGS += vfio_pci_device_test
 include ../lib.mk

diff --git a/tools/testing/selftests/vfio/vfio_dma_mapping_test.c b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c
new file mode 100644 (file)
index 0000000..b56cebb
--- /dev/null
+++ b/tools/testing/selftests/vfio/vfio_dma_mapping_test.c
@@ -0,0 +1,51 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <fcntl.h>
+
+#include <sys/mman.h>
+
+#include <linux/sizes.h>
+#include <linux/vfio.h>
+
+#include <vfio_util.h>
+
+#include "../kselftest_harness.h"
+
+static const char *device_bdf;
+
+FIXTURE(vfio_dma_mapping_test) {
+       struct vfio_pci_device *device;
+};
+
+FIXTURE_SETUP(vfio_dma_mapping_test)
+{
+       self->device = vfio_pci_device_init(device_bdf, VFIO_TYPE1_IOMMU);
+}
+
+FIXTURE_TEARDOWN(vfio_dma_mapping_test)
+{
+       vfio_pci_device_cleanup(self->device);
+}
+
+TEST_F(vfio_dma_mapping_test, dma_map_unmap)
+{
+       const u64 size = SZ_2M;
+       void *mem;
+       u64 iova;
+
+       mem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
+       ASSERT_NE(mem, MAP_FAILED);
+
+       iova = (u64)mem;
+
+       vfio_pci_dma_map(self->device, iova, size, mem);
+       printf("Mapped HVA %p (size 0x%lx) at IOVA 0x%lx\n", mem, size, iova);
+       vfio_pci_dma_unmap(self->device, iova, size);
+
+       ASSERT_TRUE(!munmap(mem, size));
+}
+
+int main(int argc, char *argv[])
+{
+       device_bdf = vfio_selftests_get_bdf(&argc, argv);
+       return test_harness_run(argc, argv);
+}

diff --git a/tools/testing/selftests/vfio/vfio_pci_device_test.c b/tools/testing/selftests/vfio/vfio_pci_device_test.c
index 3e7049b9c8f693e76c706262c72858d0cb4978e0..a2e41398d184c4c28c0b72ccbff25d88340527f3 100644 (file)
--- a/tools/testing/selftests/vfio/vfio_pci_device_test.c
+++ b/tools/testing/selftests/vfio/vfio_pci_device_test.c
@@ -36,24 +36,6 @@ FIXTURE_TEARDOWN(vfio_pci_device_test)
        vfio_pci_device_cleanup(self->device);
 }
 
-TEST_F(vfio_pci_device_test, dma_map_unmap)
-{
-       const u64 size = SZ_2M;
-       void *mem;
-       u64 iova;
-
-       mem = mmap(NULL, size, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANONYMOUS, -1, 0);
-       ASSERT_NE(mem, MAP_FAILED);
-
-       iova = (u64)mem;
-
-       vfio_pci_dma_map(self->device, iova, size, mem);
-       printf("Mapped HVA %p (size 0x%lx) at IOVA 0x%lx\n", mem, size, iova);
-       vfio_pci_dma_unmap(self->device, iova, size);
-
-       ASSERT_TRUE(!munmap(mem, SZ_2M));
-}
-
 #define read_pci_id_from_sysfs(_file) ({                                                       \
        char __sysfs_path[PATH_MAX];                                                            \
        char __buf[32];                                                                         \