Re: [Qemu-devel] [PATCH RFC 0/2] virtio-pci: polling mode support

[Rusty Russell]

On Wed, 2 Nov 2011 21:02:42 +0200, "Michael S. Tsirkin" <address@hidden> wrote:
> MSIX spec requires that device can be operated with
> all vectors masked, by polling.
> 
> So the following patchset (lightly tested) adds this
> ability: when driver reads ISR, the device
> recalls a pending notification, and returns
> pending status in the ISR register.
> 
> The polling driver can operate as follows:
> - map all VQs and config to the same vector
> - poll ISR to get status - this also flushes VQ updates to memory
> - handle config change or VQ event depending on ISR
> 
> Comments?

This seems sane to me...

Cheers,
Rusty.