vdpa: introduce virtqueue groups
This patch introduces virtqueue groups to vDPA device. The virtqueue group is the minimal set of virtqueues that must share an address space. And the address space identifier could only be attached to a specific virtqueue group. Signed-off-by: NJason Wang <jasowang@redhat.com> Signed-off-by: NGautam Dawar <gdawar@xilinx.com> Message-Id: <20220330180436.24644-6-gdawar@xilinx.com> Signed-off-by: NMichael S. Tsirkin <mst@redhat.com>
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