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Vhost-vdpa Protocol
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Introduction
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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