[Qemu-devel] [RFC PATCH 0/2] virtio-mmio: add irqfd support for vhost-net based on virtio-mmio

Li Liu
Mon, 27 Oct 2014 11:23:04 -0000

On 2014/10/27 17:37, Peter Maydell wrote:
> On 25 October 2014 09:24, john.liuli <john.liuli at huawei.com>
wrote:
>> To get the interrupt reason to support such VIRTIO_NET_F_STATUS
>> features I add a new register offset VIRTIO_MMIO_ISRMEM which
>> will help to establish a shared memory region between qemu and
>> virtio-mmio device. Then the interrupt reason can be accessed by
>> guest driver through this region. At the same time, the virtio-mmio
>> dirver check this region to see irqfd is supported or not during
>> the irq handler registration, and different handler will be assigned.
>
> If you want to add a new register you should probably propose
> an update to the virtio spec. However, it seems to me it would
> be better to get generic PCI/PCIe working on the ARM virt
> board instead; then we can let virtio-mmio quietly fade away.
> This has been on the todo list for ages (and there have been
> RFC patches posted for plain PCI), it's just nobody's had time
> to work on it.
>
> thanks
> -- PMM
>

So you mean virtio-mmio will be replaced by PCI/PCIe on ARM at last?
If so, let this patch go with the wind:). Thx.

Li.
> .
>