1 files changed, 27 insertions, 4 deletions

diff --git a/hw/vfio/platform.c b/hw/vfio/platform.c
index 57c4a0ee2b..398db38f14 100644
--- a/hw/vfio/platform.c
+++ b/hw/vfio/platform.c
@@ -655,10 +655,32 @@ static void vfio_platform_realize(DeviceState *dev, Error **errp)
         goto out;
     }
 
+    if (!vdev->compat) {
+        GError *gerr = NULL;
+        gchar *contents;
+        gsize length;
+        char *path;
+
+        path = g_strdup_printf("%s/of_node/compatible", vbasedev->sysfsdev);
+        if (!g_file_get_contents(path, &contents, &length, &gerr)) {
+            error_setg(errp, "%s", gerr->message);
+            g_error_free(gerr);
+            g_free(path);
+            return;
+        }
+        g_free(path);
+        vdev->compat = contents;
+        for (vdev->num_compat = 0; length; vdev->num_compat++) {
+            size_t skip = strlen(contents) + 1;
+            contents += skip;
+            length -= skip;
+        }
+    }
+
     for (i = 0; i < vbasedev->num_regions; i++) {
         if (vfio_region_mmap(vdev->regions[i])) {
-            error_report("%s mmap unsupported. Performance may be slow",
-                         memory_region_name(vdev->regions[i]->mem));
+            warn_report("%s mmap unsupported, performance may be slow",
+                        memory_region_name(vdev->regions[i]->mem));
         }
         sysbus_init_mmio(sbdev, vdev->regions[i]->mem);
     }
@@ -668,7 +690,7 @@ out:
     }
 
     if (vdev->vbasedev.name) {
-        error_prepend(errp, ERR_PREFIX, vdev->vbasedev.name);
+        error_prepend(errp, VFIO_MSG_PREFIX, vdev->vbasedev.name);
     } else {
         error_prepend(errp, "vfio error: ");
     }
@@ -700,6 +722,8 @@ static void vfio_platform_class_init(ObjectClass *klass, void *data)
     dc->desc = "VFIO-based platform device assignment";
     sbc->connect_irq_notifier = vfio_start_irqfd_injection;
     set_bit(DEVICE_CATEGORY_MISC, dc->categories);
+    /* Supported by TYPE_VIRT_MACHINE */
+    dc->user_creatable = true;
 }
 
 static const TypeInfo vfio_platform_dev_info = {
@@ -708,7 +732,6 @@ static const TypeInfo vfio_platform_dev_info = {
     .instance_size = sizeof(VFIOPlatformDevice),
     .class_init = vfio_platform_class_init,
     .class_size = sizeof(VFIOPlatformDeviceClass),
-    .abstract   = true,
 };
 
 static void register_vfio_platform_dev_type(void)