On 2020/2/11 下午7:33, Michael S. Tsirkin wrote:
On Mon, Feb 10, 2020 at 05:05:17PM +0800, Zha Bin wrote:
From: Liu Jiang<ge...@linux.alibaba.com>

The standard virtio-mmio devices use notification register to signal
backend. This will cause vmexits and slow down the performance when we
passthrough the virtio-mmio devices to guest virtual machines.
We proposed to update virtio over MMIO spec to add the per-queue
notify feature VIRTIO_F_MMIO_NOTIFICATION[1]. It can allow the VMM to
configure notify location for each queue.

[1]https://lkml.org/lkml/2020/1/21/31

Signed-off-by: Liu Jiang<ge...@linux.alibaba.com>
Co-developed-by: Zha Bin<zha...@linux.alibaba.com>
Signed-off-by: Zha Bin<zha...@linux.alibaba.com>
Co-developed-by: Jing Liu<jing2....@linux.intel.com>
Signed-off-by: Jing Liu<jing2....@linux.intel.com>
Co-developed-by: Chao Peng<chao.p.p...@linux.intel.com>
Signed-off-by: Chao Peng<chao.p.p...@linux.intel.com>
Hmm. Any way to make this static so we don't need
base and multiplier?


E.g page per vq?

Thanks


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