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| author | Cindy Lu <lulu@redhat.com> | 2020-07-01 22:55:37 +0800 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2020-07-07 07:59:51 -0400 |
| commit | 108a64818e69be0a97cde3838d768f2d9910c08b (patch) | |
| tree | a60b587a2ff2b704dac731d9886bc8c30c7d0d0c /docs | |
| parent | 38140cc4d9713dc9af78090503105bf9c82b6bff (diff) | |
| download | qemu-108a64818e69be0a97cde3838d768f2d9910c08b.zip qemu-108a64818e69be0a97cde3838d768f2d9910c08b.tar.gz qemu-108a64818e69be0a97cde3838d768f2d9910c08b.tar.bz2 | |
vhost-vdpa: introduce vhost-vdpa backend
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 \
Signed-off-by: Lingshan zhu <lingshan.zhu@intel.com>
Signed-off-by: Tiwei Bie <tiwei.bie@intel.com>
Signed-off-by: Cindy Lu <lulu@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Message-Id: <20200701145538.22333-14-lulu@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/interop/index.rst | 1 | ||||
| -rw-r--r-- | docs/interop/vhost-vdpa.rst | 17 |
2 files changed, 18 insertions, 0 deletions
diff --git a/docs/interop/index.rst b/docs/interop/index.rst index 049387a..006f986 100644 --- a/docs/interop/index.rst +++ b/docs/interop/index.rst @@ -20,3 +20,4 @@ Contents: qemu-ga vhost-user vhost-user-gpu + vhost-vdpa diff --git a/docs/interop/vhost-vdpa.rst b/docs/interop/vhost-vdpa.rst new file mode 100644 index 0000000..0c70ba0 --- /dev/null +++ b/docs/interop/vhost-vdpa.rst @@ -0,0 +1,17 @@ +===================== +Vhost-vdpa Protocol +===================== + +Introduction +============= +vDPA(Virtual data path acceleration) device is a device that uses +a datapath which complies with the virtio specifications with vendor +specific control path. vDPA devices can be both physically located on +the hardware or emulated by software. + +This document describes the vDPA support in qemu + +Here is the kernel commit here +https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4c8cf31885f69e86be0b5b9e6677a26797365e1d + +TODO : More information will add later |