Re: [Xen-devel] Bug in PCI Passthrough

[Josef Vogt <josef.vogt@xxxxxxxxxx>]

Am 20.04.2011 21:38, schrieb Konrad Rzeszutek Wilk:
> 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).
>    
This is from Standard debian kernel (2.6.32-5-686):

            CPU0

   0:      33706    XT-PIC-XT        timer
   1:        154    XT-PIC-XT        i8042
   2:          0    XT-PIC-XT        cascade
   5:          0    XT-PIC-XT        ES18xx
   6:          3    XT-PIC-XT        floppy
   7:          1    XT-PIC-XT        parport0
   8:          0    XT-PIC-XT        rtc0
   9:          0    XT-PIC-XT        acpi
  10:        250    XT-PIC-XT        eth1
  11:        796    XT-PIC-XT        uhci_hcd:usb1, eth0
  12:          4    XT-PIC-XT        i8042
  14:      16290    XT-PIC-XT        ata_piix
  15:        206    XT-PIC-XT        ata_piix
 NMI:          0   Non-maskable interrupts
 LOC:          0   Local timer interrupts
 SPU:          0   Spurious interrupts
 PMI:          0   Performance monitoring interrupts
 PND:          0   Performance pending work
 RES:          0   Rescheduling interrupts
 CAL:          0   Function call interrupts
 TLB:          0   TLB shootdowns
 TRM:          0   Thermal event interrupts
 THR:          0   Threshold APIC interrupts
 MCE:          0   Machine check exceptions
 MCP:          2   Machine check polls
 ERR:          0
 MIS:          0

For dmesg see attachment.

> >      
> > > 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.
>    
No, thank you for looking at this! :)

Attachment: dmesg_standard_kernel
Description: Text document

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