diff options
Diffstat (limited to 'hw/virtio/vhost.c')
-rw-r--r-- | hw/virtio/vhost.c | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c index 311432f190..7f61018f2a 100644 --- a/hw/virtio/vhost.c +++ b/hw/virtio/vhost.c @@ -1481,6 +1481,102 @@ void vhost_dev_set_config_notifier(struct vhost_dev *hdev, hdev->config_ops = ops; } +void vhost_dev_free_inflight(struct vhost_inflight *inflight) +{ + if (inflight->addr) { + qemu_memfd_free(inflight->addr, inflight->size, inflight->fd); + inflight->addr = NULL; + inflight->fd = -1; + } +} + +static int vhost_dev_resize_inflight(struct vhost_inflight *inflight, + uint64_t new_size) +{ + Error *err = NULL; + int fd = -1; + void *addr = qemu_memfd_alloc("vhost-inflight", new_size, + F_SEAL_GROW | F_SEAL_SHRINK | F_SEAL_SEAL, + &fd, &err); + + if (err) { + error_report_err(err); + return -1; + } + + vhost_dev_free_inflight(inflight); + inflight->offset = 0; + inflight->addr = addr; + inflight->fd = fd; + inflight->size = new_size; + + return 0; +} + +void vhost_dev_save_inflight(struct vhost_inflight *inflight, QEMUFile *f) +{ + if (inflight->addr) { + qemu_put_be64(f, inflight->size); + qemu_put_be16(f, inflight->queue_size); + qemu_put_buffer(f, inflight->addr, inflight->size); + } else { + qemu_put_be64(f, 0); + } +} + +int vhost_dev_load_inflight(struct vhost_inflight *inflight, QEMUFile *f) +{ + uint64_t size; + + size = qemu_get_be64(f); + if (!size) { + return 0; + } + + if (inflight->size != size) { + if (vhost_dev_resize_inflight(inflight, size)) { + return -1; + } + } + inflight->queue_size = qemu_get_be16(f); + + qemu_get_buffer(f, inflight->addr, size); + + return 0; +} + +int vhost_dev_set_inflight(struct vhost_dev *dev, + struct vhost_inflight *inflight) +{ + int r; + + if (dev->vhost_ops->vhost_set_inflight_fd && inflight->addr) { + r = dev->vhost_ops->vhost_set_inflight_fd(dev, inflight); + if (r) { + VHOST_OPS_DEBUG("vhost_set_inflight_fd failed"); + return -errno; + } + } + + return 0; +} + +int vhost_dev_get_inflight(struct vhost_dev *dev, uint16_t queue_size, + struct vhost_inflight *inflight) +{ + int r; + + if (dev->vhost_ops->vhost_get_inflight_fd) { + r = dev->vhost_ops->vhost_get_inflight_fd(dev, queue_size, inflight); + if (r) { + VHOST_OPS_DEBUG("vhost_get_inflight_fd failed"); + return -errno; + } + } + + return 0; +} + /* Host notifiers must be enabled at this point. */ int vhost_dev_start(struct vhost_dev *hdev, VirtIODevice *vdev) { |