Re: Was:Bug in PCI Passthrough. Is: XT-PIC controller not working with pvops kernel.

[Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>]

On Wed, Apr 20, 2011 at 10:01:10PM +0200, Josef Vogt wrote:
> 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):

Whoa. Old style PIC controller.
> 
>             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

So to fix your problem we would need to do some extra surgery in the
bringup code. We really did not think that anybody would still be
trying to run on this old hardware.