1 files changed, 54 insertions, 0 deletions
diff --git a/hw/vfio/helpers.c b/hw/vfio/helpers.c
index 168847e7c5..6789870802 100644
--- a/hw/vfio/helpers.c
+++ b/hw/vfio/helpers.c
@@ -27,6 +27,7 @@
 #include "trace.h"
 #include "qapi/error.h"
 #include "qemu/error-report.h"
+#include "monitor/monitor.h"
 
 /*
  * Common VFIO interrupt disable
@@ -609,3 +610,56 @@ bool vfio_has_region_cap(VFIODevice *vbasedev, int region, uint16_t cap_type)
 
     return ret;
 }
+
+int vfio_device_get_name(VFIODevice *vbasedev, Error **errp)
+{
+    struct stat st;
+
+    if (vbasedev->fd < 0) {
+        if (stat(vbasedev->sysfsdev, &st) < 0) {
+            error_setg_errno(errp, errno, "no such host device");
+            error_prepend(errp, VFIO_MSG_PREFIX, vbasedev->sysfsdev);
+            return -errno;
+        }
+        /* User may specify a name, e.g: VFIO platform device */
+        if (!vbasedev->name) {
+            vbasedev->name = g_path_get_basename(vbasedev->sysfsdev);
+        }
+    } else {
+        if (!vbasedev->iommufd) {
+            error_setg(errp, "Use FD passing only with iommufd backend");
+            return -EINVAL;
+        }
+        /*
+         * Give a name with fd so any function printing out vbasedev->name
+         * will not break.
+         */
+        if (!vbasedev->name) {
+            vbasedev->name = g_strdup_printf("VFIO_FD%d", vbasedev->fd);
+        }
+    }
+
+    return 0;
+}
+
+void vfio_device_set_fd(VFIODevice *vbasedev, const char *str, Error **errp)
+{
+    int fd = monitor_fd_param(monitor_cur(), str, errp);
+
+    if (fd < 0) {
+        error_prepend(errp, "Could not parse remote object fd %s:", str);
+        return;
+    }
+    vbasedev->fd = fd;
+}
+
+void vfio_device_init(VFIODevice *vbasedev, int type, VFIODeviceOps *ops,
+                      DeviceState *dev, bool ram_discard)
+{
+    vbasedev->type = type;
+    vbasedev->ops = ops;
+    vbasedev->dev = dev;
+    vbasedev->fd = -1;
+
+    vbasedev->ram_block_discard_allowed = ram_discard;
+}