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

On 2023/02/08 0:37, Frank Li wrote:

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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@linutronix.de (local)

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 (local)

Thank for sharing this those information. I'll see the details to embed.

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Best,
Shunsuke.

Best,

Shunsuke.

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