1 files changed, 14 insertions, 0 deletions
diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c
index b14edd46ed..7e23e9080c 100644
--- a/hw/vfio/helpers.c
+++ b/hw/vfio/helpers.c
@@ -675,3 +675,17 @@ int vfio_device_get_aw_bits(VFIODevice *vdev)
 
     return HOST_IOMMU_DEVICE_CAP_AW_BITS_MAX;
 }
+
+bool vfio_device_is_mdev(VFIODevice *vbasedev)
+{
+    g_autofree char *subsys = NULL;
+    g_autofree char *tmp = NULL;
+
+    if (!vbasedev->sysfsdev) {
+        return false;
+    }
+
+    tmp = g_strdup_printf("%s/subsystem", vbasedev->sysfsdev);
+    subsys = realpath(tmp, NULL);
+    return subsys && (strcmp(subsys, "/sys/bus/mdev") == 0);
+}