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Re: [Xen-devel] Bug in PCI Passthrough

To: Josef Vogt <josef.vogt@xxxxxxxxxx>
Subject: Re: [Xen-devel] Bug in PCI Passthrough
From: Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>
Date: Wed, 20 Apr 2011 15:38:37 -0400
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On Wed, Apr 20, 2011 at 09:16:31PM +0200, Josef Vogt wrote:
> Am 20.04.2011 14:51, schrieb Konrad Rzeszutek Wilk:
> >On Wed, Apr 20, 2011 at 11:15:23AM +0200, Josef Vogt wrote:
> >>Hello all
> >>
> >>I tried to enable PCI Passthrough in my Debian Squeeze installation.
> >>Unfortunately, it didnt work. The following bug showed up (excerpt
> >>from dmesg):
> >>
> >>[ 10.148612] uhci_hcd 0000:00:14.2: PCI INT D ->  Link[LNKD] ->  GSI 11
> >>(level, low) ->  IRQ 11
> >>[ 4.678352] Failed to setup GSI :11, err_code:-22
> >>[ 4.678480] dmfe 0000:00:0e.0: PCI INT A ->  Link[LNKB] ->  GSI 11 (level,
> >>low) ->  IRQ 11
> >>[ 6.868419] Failed to setup GSI :10, err_code:-22
> >That is most strange. Your interrupts are below IRQ 16, and they are level?
> >They should have been edge, unless you have some strange machine.
> >
> Hm... it's a rather old one: Compaq Deskpro PD1006 (Pentium III)

Can you boot the same kernel but without Xen and send the bootup output?
And also the /proc/interrupts (the full one).
> >If you don't pass in the card to the DomU, but run it under Dom0, what is
> >the GSI and /proc/interrupts for the dmfe?
> /proc/interrupts for dmfe in Dom0 (card is up and running, I disabled the 
> other):
> cat /proc/interrupts | grep eth
> 11:        893  xen-pirq-xt-pic    uhci_hcd:usb1, eth0
> GSI: I'm not so sure what you mean but this must be GSI 11 (see above or 
> dmesg in attachment)

<blinks> Well, it looks like your motherboard has the IRQs below 16 to be level.
That is odd. 
> >Can you also attach the full serial output? (so we can see the Xen 
> >hypervisor output
> >and the Linux Dom0 output).
> This is what i get (see attached logs)

Thank you.

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