RE: [EXT] Re: [RFC PATCH 4/4] PCI: endpoint: function: Add EP function driver to provide virtio net device

[Frank Li]

> > but it may need update host side pci virtio driver.
> Thanks, is it possible to use  MSI-X as well? The virtio spec
> indicates to use legacy irq or
> MSI-X only.

I supposed yes. It is depend MSI controller type in EP side. 
But not like standard PCI MSI-X, it is platform MSI-X irq. 

If use GIC-its, it should support MSI-X.

Thomas Gleixner is working on pre-device msi irq domain. 
https://lore.kernel.org/all/20221121135653.208611233@xxxxxxxxxxxxx

I hope Thomas can finish their work soon. 
so I can continue my patch upstream work.
https://lore.kernel.org/imx/87wn7evql7.ffs@tglx/T/#u

> >
> Best,
> Shunsuke.