pci: move pcibus_t to qemu-common

[qemu.git] / hw / virtio.c

diff --git a/hw/virtio.c b/hw/virtio.c
index 1f92171f688545b38bbe549dc3658b6fe86bc49c..7c020a3383a7c0df01fe8d792e7b2ffa0590fb94 100644 (file)
--- a/hw/virtio.c
+++ b/hw/virtio.c
@@ -75,8 +75,6 @@ struct VirtQueue
     void (*handle_output)(VirtIODevice *vdev, VirtQueue *vq);
 };
 
-#define VIRTIO_PCI_QUEUE_MAX        16
-
 /* virt queue functions */
 static void virtqueue_init(VirtQueue *vq)
 {
@@ -445,7 +443,7 @@ void virtio_reset(void *opaque)
     if (vdev->reset)
         vdev->reset(vdev);
 
-    vdev->features = 0;
+    vdev->guest_features = 0;
     vdev->queue_sel = 0;
     vdev->status = 0;
     vdev->isr = 0;
@@ -598,7 +596,7 @@ void virtio_notify(VirtIODevice *vdev, VirtQueue *vq)
 {
     /* Always notify when queue is empty (when feature acknowledge) */
     if ((vring_avail_flags(vq) & VRING_AVAIL_F_NO_INTERRUPT) &&
-        (!(vdev->features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) ||
+        (!(vdev->guest_features & (1 << VIRTIO_F_NOTIFY_ON_EMPTY)) ||
          (vq->inuse || vring_avail_idx(vq) != vq->last_avail_idx)))
         return;
 
@@ -625,7 +623,7 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
     qemu_put_8s(f, &vdev->status);
     qemu_put_8s(f, &vdev->isr);
     qemu_put_be16s(f, &vdev->queue_sel);
-    qemu_put_be32s(f, &vdev->features);
+    qemu_put_be32s(f, &vdev->guest_features);
     qemu_put_be32(f, vdev->config_len);
     qemu_put_buffer(f, vdev->config, vdev->config_len);
 
@@ -651,6 +649,9 @@ void virtio_save(VirtIODevice *vdev, QEMUFile *f)
 int virtio_load(VirtIODevice *vdev, QEMUFile *f)
 {
     int num, i, ret;
+    uint32_t features;
+    uint32_t supported_features =
+        vdev->binding->get_features(vdev->binding_opaque);
 
     if (vdev->binding->load_config) {
         ret = vdev->binding->load_config(vdev->binding_opaque, f);
@@ -661,7 +662,13 @@ int virtio_load(VirtIODevice *vdev, QEMUFile *f)
     qemu_get_8s(f, &vdev->status);
     qemu_get_8s(f, &vdev->isr);
     qemu_get_be16s(f, &vdev->queue_sel);
-    qemu_get_be32s(f, &vdev->features);
+    qemu_get_be32s(f, &features);
+    if (features & ~supported_features) {
+        fprintf(stderr, "Features 0x%x unsupported. Allowed features: 0x%x\n",
+                features, supported_features);
+        return -1;
+    }
+    vdev->guest_features = features;
     vdev->config_len = qemu_get_be32(f);
     qemu_get_buffer(f, vdev->config, vdev->config_len);