Re: [PATCH 12/21] vhost-vdpa: introduce uAPI to get the number of virtqueue groups

[Jason Wang]

On 2020/12/30 下午6:05, Eli Cohen wrote:
> On Wed, Dec 16, 2020 at 02:48:09PM +0800, Jason Wang wrote:
> > Follows the vDPA support for multiple address spaces, this patch
> > introduce uAPI for the userspace to know the number of virtqueue
> > groups supported by the vDPA device.
> >
> > Signed-off-by: Jason Wang<jasowang@xxxxxxxxxx>
> > ---
> >   drivers/vhost/vdpa.c       | 4 ++++
> >   include/uapi/linux/vhost.h | 3 +++
> >   2 files changed, 7 insertions(+)
> >
> > diff --git a/drivers/vhost/vdpa.c b/drivers/vhost/vdpa.c
> > index 060d5b5b7e64..1ba5901b28e7 100644
> > --- a/drivers/vhost/vdpa.c
> > +++ b/drivers/vhost/vdpa.c
> > @@ -536,6 +536,10 @@ static long vhost_vdpa_unlocked_ioctl(struct file *filep,
> >   	case VHOST_VDPA_GET_VRING_NUM:
> >   		r = vhost_vdpa_get_vring_num(v, argp);
> >   		break;
> > +	case VHOST_VDPA_GET_GROUP_NUM:
> > +		r = copy_to_user(argp, &v->vdpa->ngroups,
> > +				 sizeof(v->vdpa->ngroups));
> > +		break;
> Is this and other ioctls already supported in qemu?


Not yet, the prototype is under development.

I test the series with a small and dedicated userspace program.

Thanks


>