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SubjectRe: [PATCH v2 1/5] virtio-mmio: add notify feature for per-queue

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<>
>> 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]
>> Signed-off-by: Liu Jiang<>
>> Co-developed-by: Zha Bin<>
>> Signed-off-by: Zha Bin<>
>> Co-developed-by: Jing Liu<>
>> Signed-off-by: Jing Liu<>
>> Co-developed-by: Chao Peng<>
>> Signed-off-by: Chao Peng<>
> Hmm. Any way to make this static so we don't need
> base and multiplier?

E.g page per vq?


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