Re: KVM PCI passthrough IRQ limitations

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On Wednesday 04 March 2009 09:15:57 Jason Kwon wrote:
> Chris Wright wrote:
> > * Jason Kwon (jkwon@xxxxxxxxxxx) wrote:
> >> pci 0000:02:00.0: PCI INT A -> GSI 16 (level, low) -> IRQ 16
> >> IRQ handler type mismatch for IRQ 16
> >> current handler: uhci_hcd:usb3
> >
> > This is a shared interrupt (and pci device assignment will request a
> > non-shared interrupt).  Are you using that usb host controller?  Can you
> > unbind it?
>
> I attempted unbinding the usb host driver, but the IRQ was/is also
> shared by the SATA drive controller, so I'm stuck.  I tried moving the
> card to a different slot but the IRQ assignments were the same.
>
> Does it make any difference whether the device is MSI-capable or not?

If the device support MSI, msi2intx=1(default value) would resolve the sharing 
interrupt issue. So seems the device didn't support MSI...

-- 
regards
Yang, Sheng


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