Re: [PATCH v9 05/10] vhost-vdpa: add support for config interrupt call back

[Michael S. Tsirkin]

On Thu, Sep 30, 2021 at 10:33:43AM +0800, Cindy Lu wrote:
> Add new call back function in vhost-vdpa, this call back function will
> set the fb number to hardware.
> 
> Signed-off-by: Cindy Lu <lulu@redhat.com>

fb being what? you mean fd. said fd doing what exactly?
all this needs to be in the commit log pls.

> ---
>  hw/virtio/trace-events | 2 ++
>  hw/virtio/vhost-vdpa.c | 7 +++++++
>  2 files changed, 9 insertions(+)
> 
> diff --git a/hw/virtio/trace-events b/hw/virtio/trace-events
> index 8ed19e9d0c..836e73d1f7 100644
> --- a/hw/virtio/trace-events
> +++ b/hw/virtio/trace-events
> @@ -52,6 +52,8 @@ vhost_vdpa_set_vring_call(void *dev, unsigned int index, 
> int fd) "dev: %p index:
>  vhost_vdpa_get_features(void *dev, uint64_t features) "dev: %p features: 
> 0x%"PRIx64
>  vhost_vdpa_set_owner(void *dev) "dev: %p"
>  vhost_vdpa_vq_get_addr(void *dev, void *vq, uint64_t desc_user_addr, 
> uint64_t avail_user_addr, uint64_t used_user_addr) "dev: %p vq: %p 
> desc_user_addr: 0x%"PRIx64" avail_user_addr: 0x%"PRIx64" used_user_addr: 
> 0x%"PRIx64
> +vhost_vdpa_set_config_call(void *dev, int fd)"dev: %p fd: %d"
> +
>  
>  # virtio.c
>  virtqueue_alloc_element(void *elem, size_t sz, unsigned in_num, unsigned 
> out_num) "elem %p size %zd in_num %u out_num %u"
> diff --git a/hw/virtio/vhost-vdpa.c b/hw/virtio/vhost-vdpa.c
> index 4fa414feea..73764afc61 100644
> --- a/hw/virtio/vhost-vdpa.c
> +++ b/hw/virtio/vhost-vdpa.c
> @@ -622,6 +622,12 @@ static int vhost_vdpa_set_vring_call(struct vhost_dev 
> *dev,
>      trace_vhost_vdpa_set_vring_call(dev, file->index, file->fd);
>      return vhost_vdpa_call(dev, VHOST_SET_VRING_CALL, file);
>  }
> +static int vhost_vdpa_set_config_call(struct vhost_dev *dev,
> +                                       int fd)
> +{
> +    trace_vhost_vdpa_set_config_call(dev, fd);
> +    return vhost_vdpa_call(dev, VHOST_VDPA_SET_CONFIG_CALL, &fd);
> +}
>  
>  static int vhost_vdpa_get_features(struct vhost_dev *dev,
>                                       uint64_t *features)
> @@ -688,4 +694,5 @@ const VhostOps vdpa_ops = {
>          .vhost_get_device_id = vhost_vdpa_get_device_id,
>          .vhost_vq_get_addr = vhost_vdpa_vq_get_addr,
>          .vhost_force_iommu = vhost_vdpa_force_iommu,
> +        .vhost_set_config_call = vhost_vdpa_set_config_call,
>  };
> -- 
> 2.21.3