Re: [PATCH RFC 0/8] virtio: add guest MSI-X support

[Avi Kivity <avi@redhat.com>]

Michael S. Tsirkin wrote:
> This does not work for MSIX - in linux, you must map all MSI-X entries
> to interrupt vectors upfront.
>   

What?  that's very inflexible.

Can you point me at the code?

> So what I see is transports providing something like:
>
> struct virtio_interrupt_mapping {
> 	int virtqueue;
> 	int interrupt;
> };
>
> map_vqs_to_interrupt(dev, struct virtio_interrupt_mapping *, int nvirtqueues);
> unmap_vqs(dev);
>   

Isn't that the same thing?  Please explain the flow.


-- 
Do not meddle in the internals of kernels, for they are subtle and quick to panic.