diff options
Diffstat (limited to 'hw/virtio/vhost-shadow-virtqueue.c')
| -rw-r--r-- | hw/virtio/vhost-shadow-virtqueue.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/hw/virtio/vhost-shadow-virtqueue.c b/hw/virtio/vhost-shadow-virtqueue.c index 519328445c..573ac0d9cf 100644 --- a/hw/virtio/vhost-shadow-virtqueue.c +++ b/hw/virtio/vhost-shadow-virtqueue.c @@ -107,6 +107,35 @@ void vhost_svq_set_svq_call_fd(VhostShadowVirtqueue *svq, int call_fd) } /** + * Get the shadow vq vring address. + * @svq: Shadow virtqueue + * @addr: Destination to store address + */ +void vhost_svq_get_vring_addr(const VhostShadowVirtqueue *svq, + struct vhost_vring_addr *addr) +{ + addr->desc_user_addr = (uint64_t)(intptr_t)svq->vring.desc; + addr->avail_user_addr = (uint64_t)(intptr_t)svq->vring.avail; + addr->used_user_addr = (uint64_t)(intptr_t)svq->vring.used; +} + +size_t vhost_svq_driver_area_size(const VhostShadowVirtqueue *svq) +{ + size_t desc_size = sizeof(vring_desc_t) * svq->vring.num; + size_t avail_size = offsetof(vring_avail_t, ring) + + sizeof(uint16_t) * svq->vring.num; + + return ROUND_UP(desc_size + avail_size, qemu_real_host_page_size); +} + +size_t vhost_svq_device_area_size(const VhostShadowVirtqueue *svq) +{ + size_t used_size = offsetof(vring_used_t, ring) + + sizeof(vring_used_elem_t) * svq->vring.num; + return ROUND_UP(used_size, qemu_real_host_page_size); +} + +/** * Set a new file descriptor for the guest to kick the SVQ and notify for avail * * @svq: The svq |