search for: in_iov

...t; + > +enum { > + VHOST_BLK_VQ_MAX = 16, > + VHOST_BLK_VQ_MAX_REQS = 128, > +}; > + > +struct vhost_blk_req { > + struct llist_node list; > + int index; > + struct vhost_blk_queue *q; > + struct virtio_blk_outhdr hdr; > + struct iovec *out_iov; > + struct iovec *in_iov; > + u8 out_num; > + u8 in_num; > + long len; > + struct kiocb iocb; > + struct iov_iter i; > + int res; > + void __user *status; > +}; > + > +struct vhost_blk_queue { > + int index; > + struct vhost_blk *blk; > + struct vhost_virtqueue vq; > + struct vhost...

...ent->pid, current->comm, 155 write ? "WRITE" : "READ", req->hdr.sector, len); 156 157 req->len = len; 158 rem_len = len; 159 iov_iter_init(&req->i, (write ? WRITE : READ), 160 write ? &req->out_iov[0] : &req->in_iov[0], 161 nr_seg, len); 162 163 req->iocb.ki_pos = sector << 9; 164 req->iocb.ki_filp = blk->backend; 165 req->iocb.ki_complete = vhost_blk_iocb_complete; 166 req->iocb.ki_flags = IOCB_DIRECT; 167 168 if (write) 169 ret = call_wr...

...ee_vr; + + fd_install(fd, filp); + return fd; + +free_vr: + kfree(vr); +put_filp: + put_filp(filp); +put_fd: + put_unused_fd(fd); +out: + return err; +} + +/* Returns an error, or 0 (no buffers), or an id for vring_used_buffer() */ +int vring_get_buffer(struct vring_info *vr, + struct iovec *in_iov, + unsigned int *num_in, unsigned long *in_len, + struct iovec *out_iov, + unsigned int *num_out, unsigned long *out_len) +{ + unsigned int i, in = 0, out = 0; + unsigned long dummy; + u16 head; + struct vring_desc d; + + if (unlikely(get_user(head, &vr->ring.avail->idx)...

...ee_vr; + + fd_install(fd, filp); + return fd; + +free_vr: + kfree(vr); +put_filp: + put_filp(filp); +put_fd: + put_unused_fd(fd); +out: + return err; +} + +/* Returns an error, or 0 (no buffers), or an id for vring_used_buffer() */ +int vring_get_buffer(struct vring_info *vr, + struct iovec *in_iov, + unsigned int *num_in, unsigned long *in_len, + struct iovec *out_iov, + unsigned int *num_out, unsigned long *out_len) +{ + unsigned int i, in = 0, out = 0; + unsigned long dummy; + u16 head; + struct vring_desc d; + + if (unlikely(get_user(head, &vr->ring.avail->idx)...

...+ VHOST_BLK_VQ_MAX_REQS = 128, > +}; These limits seem arbitrary and probably too low. > + > +struct vhost_blk_req { > + struct llist_node list; > + int index; > + struct vhost_blk_queue *q; > + struct virtio_blk_outhdr hdr; > + struct iovec *out_iov; > + struct iovec *in_iov; > + u8 out_num; > + u8 in_num; > + long len; > + struct kiocb iocb; > + struct iov_iter i; > + int res; > + void __user *status; > +}; > + > +struct vhost_blk_queue { > + int index; > + struct vhost_blk *blk; > + struct vhost_virtqueue vq; > + struct vhost...

This series is mainly for testing live migration between 2 vdpa_sim_blk devices. The first patch is preparation and moves the buffer allocation into devices, the second patch adds the `shared_buffer_mutex` parameter to vdpa_sim_blk to use the same ramdisk for all devices. Tested with QEMU v8.0.0-rc2 in this way: modprobe vhost_vdpa modprobe vdpa_sim_blk shared_backend=true vdpa dev add mgmtdev

Hi all, These 2 patches added virtio-nvme to kernel and qemu, basically modified from virtio-blk and nvme code. As title said, request for your comments. Play it in Qemu with: -drive file=disk.img,format=raw,if=none,id=D22 \ -device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4 The goal is to have a full NVMe stack from VM guest(virtio-nvme) to host(vhost_nvme) to LIO NVMe-over-fabrics

Hi all, These 2 patches added virtio-nvme to kernel and qemu, basically modified from virtio-blk and nvme code. As title said, request for your comments. Play it in Qemu with: -drive file=disk.img,format=raw,if=none,id=D22 \ -device virtio-nvme-pci,drive=D22,serial=1234,num_queues=4 The goal is to have a full NVMe stack from VM guest(virtio-nvme) to host(vhost_nvme) to LIO NVMe-over-fabrics

The following patches were built over linux-next which contains various vhost patches in mst's tree and the vhost_task patchset in Christian Brauner's tree: git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git kernel.user_worker branch: https://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux.git/log/?h=kernel.user_worker The latter patchset handles the review comment

This is the initial proposal for a paravirtualized IOMMU device using virtio transport. It contains a description of the device, a Linux driver, and a toy implementation in kvmtool. With this prototype, you can translate DMA to guest memory from emulated (virtio), or passed-through (VFIO) devices. In its simplest form, implemented here, the device handles map/unmap requests from the guest. Future

This is the initial proposal for a paravirtualized IOMMU device using virtio transport. It contains a description of the device, a Linux driver, and a toy implementation in kvmtool. With this prototype, you can translate DMA to guest memory from emulated (virtio), or passed-through (VFIO) devices. In its simplest form, implemented here, the device handles map/unmap requests from the guest. Future