Expose the list of iommu_modes to enable tests that want to iterate
through all possible iommu modes.

Signed-off-by: David Matlack <dmatlack@google.com>
---
 tools/testing/selftests/vfio/lib/include/libvfio/iommu.h | 2 ++
 tools/testing/selftests/vfio/lib/iommu.c                 | 4 +++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/testing/selftests/vfio/lib/include/libvfio/iommu.h b/tools/testing/selftests/vfio/lib/include/libvfio/iommu.h
index 5c9b9dc6d993..a03ff2281f11 100644
--- a/tools/testing/selftests/vfio/lib/include/libvfio/iommu.h
+++ b/tools/testing/selftests/vfio/lib/include/libvfio/iommu.h
@@ -15,6 +15,8 @@ struct iommu_mode {
 	unsigned long iommu_type;
 };
 
+extern const struct iommu_mode iommu_modes[];
+extern const int nr_iommu_modes;
 extern const char *default_iommu_mode;
 
 struct dma_region {
diff --git a/tools/testing/selftests/vfio/lib/iommu.c b/tools/testing/selftests/vfio/lib/iommu.c
index 58b7fb7430d4..add35dbc83f8 100644
--- a/tools/testing/selftests/vfio/lib/iommu.c
+++ b/tools/testing/selftests/vfio/lib/iommu.c
@@ -23,7 +23,7 @@
 const char *default_iommu_mode = "iommufd";
 
 /* Reminder: Keep in sync with FIXTURE_VARIANT_ADD_ALL_IOMMU_MODES(). */
-static const struct iommu_mode iommu_modes[] = {
+const struct iommu_mode iommu_modes[] = {
 	{
 		.name = "vfio_type1_iommu",
 		.container_path = "/dev/vfio/vfio",
@@ -49,6 +49,8 @@ static const struct iommu_mode iommu_modes[] = {
 	},
 };
 
+const int nr_iommu_modes = ARRAY_SIZE(iommu_modes);
+
 static const struct iommu_mode *lookup_iommu_mode(const char *iommu_mode)
 {
 	int i;
-- 
2.53.0.rc1.225.gd81095ad13-goog