On 2021/1/30 ??4:54, Eugenio P?rez wrote:> Signed-off-by: Eugenio P?rez <eperezma at redhat.com>
> ---
> include/hw/virtio/vhost.h | 1 +
> hw/virtio/vhost.c | 17 +++++++++++++++++
> 2 files changed, 18 insertions(+)
>
> diff --git a/include/hw/virtio/vhost.h b/include/hw/virtio/vhost.h
> index 4a8bc75415..fca076e3f0 100644
> --- a/include/hw/virtio/vhost.h
> +++ b/include/hw/virtio/vhost.h
> @@ -123,6 +123,7 @@ uint64_t vhost_get_features(struct vhost_dev *hdev,
const int *feature_bits,
> void vhost_ack_features(struct vhost_dev *hdev, const int *feature_bits,
> uint64_t features);
> bool vhost_has_free_slot(void);
> +struct vhost_dev *vhost_dev_from_virtio(const VirtIODevice *vdev);
>
> int vhost_net_set_backend(struct vhost_dev *hdev,
> struct vhost_vring_file *file);
> diff --git a/hw/virtio/vhost.c b/hw/virtio/vhost.c
> index 28c7d78172..8683d507f5 100644
> --- a/hw/virtio/vhost.c
> +++ b/hw/virtio/vhost.c
> @@ -61,6 +61,23 @@ bool vhost_has_free_slot(void)
> return slots_limit > used_memslots;
> }
>
> +/*
> + * Get the vhost device associated to a VirtIO device.
> + */
> +struct vhost_dev *vhost_dev_from_virtio(const VirtIODevice *vdev)
> +{
> + struct vhost_dev *hdev;
> +
> + QLIST_FOREACH(hdev, &vhost_devices, entry) {
> + if (hdev->vdev == vdev) {
> + return hdev;
> + }
> + }
> +
> + assert(hdev);
> + return NULL;
> +}
I'm not sure this can work in the case of multiqueue. E.g vhost-net
multiqueue is a N:1 mapping between vhost devics and virtio devices.
Thanks
> +
> static void vhost_dev_sync_region(struct vhost_dev *dev,
> MemoryRegionSection *section,
> uint64_t mfirst, uint64_t mlast,