Re: [Xen-devel] MSI-X interrupts to guests

[Kieran Mansley <kmansley@xxxxxxxxxxxxxx>]

On Wed, 2009-04-15 at 16:58 +0100, Jan Beulich wrote:
> >>> Kieran Mansley <kmansley@xxxxxxxxxxxxxx> 15.04.09 17:43 >>>
> >     rc = HYPERVISOR_physdev_op(PHYSDEVOP_map_pirq, &map_irq);
> 
> But you don't do this yourself, you get this done for you, right?

No, I was doing it myself.  What approach would you recommend?

> >This call succeeds.  dom0 then tells the guest the value of map_irq.pirq
> >(which seems to have a sensible value given the other interrupts mapped
> >to that domain) that it gets back from this hypercall, and the guest
> >tries to call request_irq() using that value.  The call to request_irq()
> >returns -38 (ENOSYS).
> >
> >Any ideas what the problem could be?  I'm happy to investigate.
> 
> What kernel version is it that's running in the guest? Sounds like some
> preparatory step might be missing the particular kernel version you got.

c/s 855 from the linux-2.6.18-xen.hg tree.

Thanks

Kieran


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