usb-redir: Get rid of local shadow copy of packet headers

[qemu.git] / hw / vhost.c

diff --git a/hw/vhost.c b/hw/vhost.c
index 5ece659f4ae18281a72a3236b6da8e7b55486ffe..d0ce5aad9b76f57a021fb3dc19b2e71917a3681f 100644 (file)
--- a/hw/vhost.c
+++ b/hw/vhost.c
@@ -31,11 +31,12 @@ static void vhost_dev_sync_region(struct vhost_dev *dev,
     vhost_log_chunk_t *to = dev->log + end / VHOST_LOG_CHUNK + 1;
     uint64_t addr = (start / VHOST_LOG_CHUNK) * VHOST_LOG_CHUNK;
 
-    assert(end / VHOST_LOG_CHUNK < dev->log_size);
-    assert(start / VHOST_LOG_CHUNK < dev->log_size);
     if (end < start) {
         return;
     }
+    assert(end / VHOST_LOG_CHUNK < dev->log_size);
+    assert(start / VHOST_LOG_CHUNK < dev->log_size);
+
     for (;from < to; ++from) {
         vhost_log_chunk_t log;
         int bit;
@@ -277,8 +278,9 @@ static inline void vhost_dev_log_resize(struct vhost_dev* dev, uint64_t size)
     r = ioctl(dev->control, VHOST_SET_LOG_BASE, &log_base);
     assert(r >= 0);
     for (i = 0; i < dev->n_mem_sections; ++i) {
-        vhost_sync_dirty_bitmap(dev, &dev->mem_sections[i],
-                                0, (target_phys_addr_t)~0x0ull);
+        /* Sync only the range covered by the old log */
+        vhost_sync_dirty_bitmap(dev, &dev->mem_sections[i], 0,
+                                dev->log_size * VHOST_LOG_CHUNK - 1);
     }
     if (dev->log) {
         g_free(dev->log);
@@ -436,6 +438,14 @@ static bool vhost_section(MemoryRegionSection *section)
         && memory_region_is_ram(section->mr);
 }
 
+static void vhost_begin(MemoryListener *listener)
+{
+}
+
+static void vhost_commit(MemoryListener *listener)
+{
+}
+
 static void vhost_region_add(MemoryListener *listener,
                              MemoryRegionSection *section)
 {
@@ -476,6 +486,11 @@ static void vhost_region_del(MemoryListener *listener,
     }
 }
 
+static void vhost_region_nop(MemoryListener *listener,
+                             MemoryRegionSection *section)
+{
+}
+
 static int vhost_virtqueue_set_addr(struct vhost_dev *dev,
                                     struct vhost_virtqueue *vq,
                                     unsigned idx, bool enable_log)
@@ -720,14 +735,27 @@ static void vhost_virtqueue_cleanup(struct vhost_dev *dev,
                               0, virtio_queue_get_desc_size(vdev, idx));
 }
 
-int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
+static void vhost_eventfd_add(MemoryListener *listener,
+                              MemoryRegionSection *section,
+                              bool match_data, uint64_t data, EventNotifier *e)
+{
+}
+
+static void vhost_eventfd_del(MemoryListener *listener,
+                              MemoryRegionSection *section,
+                              bool match_data, uint64_t data, EventNotifier *e)
+{
+}
+
+int vhost_dev_init(struct vhost_dev *hdev, int devfd, const char *devpath,
+                   bool force)
 {
     uint64_t features;
     int r;
     if (devfd >= 0) {
         hdev->control = devfd;
     } else {
-        hdev->control = open("/dev/vhost-net", O_RDWR);
+        hdev->control = open(devpath, O_RDWR);
         if (hdev->control < 0) {
             return -errno;
         }
@@ -744,13 +772,19 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
     hdev->features = features;
 
     hdev->memory_listener = (MemoryListener) {
+        .begin = vhost_begin,
+        .commit = vhost_commit,
         .region_add = vhost_region_add,
         .region_del = vhost_region_del,
+        .region_nop = vhost_region_nop,
         .log_start = vhost_log_start,
         .log_stop = vhost_log_stop,
         .log_sync = vhost_log_sync,
         .log_global_start = vhost_log_global_start,
         .log_global_stop = vhost_log_global_stop,
+        .eventfd_add = vhost_eventfd_add,
+        .eventfd_del = vhost_eventfd_del,
+        .priority = 10
     };
     hdev->mem = g_malloc0(offsetof(struct vhost_memory, regions));
     hdev->n_mem_sections = 0;
@@ -759,7 +793,7 @@ int vhost_dev_init(struct vhost_dev *hdev, int devfd, bool force)
     hdev->log_size = 0;
     hdev->log_enabled = false;
     hdev->started = false;
-    memory_listener_register(&hdev->memory_listener);
+    memory_listener_register(&hdev->memory_listener, NULL);
     hdev->force = force;
     return 0;
 fail: