| Date | Tue, 17 Nov 2020 11:11:21 +0000 | From | Stefan Hajnoczi <> | Subject | Re: [PATCH RFC 04/12] vdpa: add vdpa simulator for block device |
| |
On Fri, Nov 13, 2020 at 02:47:04PM +0100, Stefano Garzarella wrote: > +static void vdpasim_blk_work(struct work_struct *work) > +{ > + struct vdpasim *vdpasim = container_of(work, struct vdpasim, work); > + u8 status = VIRTIO_BLK_S_OK; > + int i; > + > + spin_lock(&vdpasim->lock); > + > + if (!(vdpasim->status & VIRTIO_CONFIG_S_DRIVER_OK)) > + goto out; > + > + for (i = 0; i < VDPASIM_BLK_VQ_NUM; i++) { > + struct vdpasim_virtqueue *vq = &vdpasim->vqs[i]; > + > + if (!vq->ready) > + continue; > + > + while (vringh_getdesc_iotlb(&vq->vring, &vq->iov, &vq->iov, > + &vq->head, GFP_ATOMIC) > 0) { > + > + int write; > + > + vq->iov.i = vq->iov.used - 1; > + write = vringh_iov_push_iotlb(&vq->vring, &vq->iov, &status, 1); > + if (write <= 0) > + break;
We're lucky the guest driver doesn't crash after VIRTIO_BLK_T_GET_ID? :) [unhandled content-type:application/pgp-signature] |