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Re: [RFC v1 3/4] vhost-vdpa: implement vhost-vdpa backend
From: |
Laurent Vivier |
Subject: |
Re: [RFC v1 3/4] vhost-vdpa: implement vhost-vdpa backend |
Date: |
Tue, 21 Apr 2020 17:54:14 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 |
On 20/04/2020 11:32, Cindy Lu wrote:
> Currently we have 2 types of vhost backends in QEMU: vhost kernel and
> vhost-user. The above patch provides a generic device for vDPA purpose,
> this vDPA device exposes to user space a non-vendor-specific configuration
> interface for setting up a vhost HW accelerator, this patch set introduces
> a third vhost backend called vhost-vdpa based on the vDPA interface.
>
> Vhost-vdpa usage:
>
> qemu-system-x86_64 -cpu host -enable-kvm \
> ......
> -netdev type=vhost-vdpa,vhostdev=/dev/vhost-vdpa-id,id=vhost-vdpa0 \
> -device virtio-net-pci,netdev=vhost-vdpa0,page-per-vq=on \
>
> Author: Tiwei Bie
Use "git commit --author" to set that.
> Signed-off-by: Cindy Lu <address@hidden>
> ---
> hw/net/vhost_net.c | 43 ++++
> hw/net/virtio-net.c | 9 +
> hw/virtio/Makefile.objs | 2 +-
> hw/virtio/vhost-backend.c | 3 +
> hw/virtio/vhost-vdpa.c | 379 ++++++++++++++++++++++++++++++
> hw/virtio/vhost.c | 5 +
> include/hw/virtio/vhost-backend.h | 6 +-
> include/hw/virtio/vhost-vdpa.h | 14 ++
> 8 files changed, 459 insertions(+), 2 deletions(-)
> create mode 100644 hw/virtio/vhost-vdpa.c
> create mode 100644 include/hw/virtio/vhost-vdpa.h
>
> diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
> index 4096d64aaf..0d13fda2fc 100644
> --- a/hw/net/vhost_net.c
> +++ b/hw/net/vhost_net.c
...
> @@ -434,6 +462,10 @@ VHostNetState *get_vhost_net(NetClientState *nc)
> assert(vhost_net);
> break;
> #endif
> + case NET_CLIENT_DRIVER_VHOST_VDPA:
> + vhost_net = vhost_vdpa_get_vhost_net(nc);
> + assert(vhost_net);
> + break;
This should be inside a "#ifdef".
Thanks,
Laurent
[RFC v1 3/4] vhost-vdpa: implement vhost-vdpa backend, Cindy Lu, 2020/04/20
[RFC v1 1/4] net: Introduce qemu_get_peer, Cindy Lu, 2020/04/20
[RFC v1 4/4] vhost: introduce vhost_set_vring_ready method, Cindy Lu, 2020/04/20
Re: [RFC v1 0/4] vDPA support in qemu, Jason Wang, 2020/04/21
Re: [RFC v1 0/4] vDPA support in qemu, Jason Wang, 2020/04/21