Re: [Fedora-xen] [Xen-devel] [PATCH] Xen 4.1.2 HVM guest realtek nic problems (eth0 8139cp transmit queue timed out)

["Pasi Kärkkäinen" <pasik@iki.fi>]

On Mon, Nov 07, 2011 at 12:02:03PM +0000, Stefano Stabellini wrote:
> On Thu, 3 Nov 2011, Keir Fraser wrote:
> > On 03/11/2011 18:07, "Pasi KÃ?rkkÃ?inen" <pasik@iki.fi> wrote:
> > 
> > > On Tue, Nov 01, 2011 at 10:56:06PM +0200, Pasi KÃ?rkkÃ?inen wrote:
> > >> On Mon, Oct 31, 2011 at 09:29:24PM +0200, Pasi KÃ?rkkÃ?inen wrote:
> > >>> On Mon, Oct 31, 2011 at 12:24:14PM -0700, Boris Derzhavets wrote:
> > >>>>    Seems to related
> > >>>> 
> > >>>>    https://bugs.launchpad.net/ubuntu/+source/xen/+bug/854829
> > >>>> 
> > >>> 
> > >>> Thanks, that seems to be the same bug.
> > >>> 
> > >>> Is the bugfix patch from xen-unstable going to backported to
> > >>> xen-4.1-testing.hg ?
> > >>> (4.1 backported patch available on ubuntu's launchpad above..)
> > >>> 
> > >> 
> > >> So the Ubuntu backport from xen-unstable to Xen 4.1.1 is here:
> > >> https://launchpadlibrarian.net/81948978/xen-pirq-resubmit-irq.patch
> > >> 
> > >> It seems to be shipping in Ubuntu 11.10 xen 4.1.1-2ubuntu4.1 packages.
> > >> 
> > >> Does that patch look suitable to be applied to xen-4.1-testing.hg ?
> > >> This bug should be fixed for Xen 4.1.3.
> > > 
> > > Any comments? 
> > 
> > This looks like a backport of Stefano's xen-unstable c/s 24007. I would like
> > him to submit/ack the backport, as it is not a trivial backport of the
> > xen-unstable patch.
> 
> I would rather use the following backport. Compared to the other one it
> returns EINVAL in PHYSDEVOP_irq_status_query when the arguments are not
> correct.
> 

Thanks! Mayoung added this patch in xen-4.1.2-1.1.fc14.src.rpm,
and binary rpms are built for Fedora 16 here:
http://koji.fedoraproject.org/koji/taskinfo?taskID=3495905

So people should test this patch (or the rpms above) and confirm 
that it fixes the emulated realtek/ne2k issues.

Thanks,

-- Pasi


> ---
> 
> diff -r 8c2d76193eaf xen/arch/x86/physdev.c
> --- a/xen/arch/x86/physdev.c	Wed Nov 02 15:02:18 2011 +0000
> +++ b/xen/arch/x86/physdev.c	Mon Nov 07 11:58:28 2011 +0000
> @@ -261,6 +261,7 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
>          ret = -EINVAL;
>          if ( eoi.irq >= v->domain->nr_pirqs )
>              break;
> +        spin_lock(&v->domain->event_lock);
>          if ( v->domain->arch.pirq_eoi_map )
>              evtchn_unmask(v->domain->pirq_to_evtchn[eoi.irq]);
>          if ( !is_hvm_domain(v->domain) ||
> @@ -268,6 +269,19 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
>              ret = pirq_guest_eoi(v->domain, eoi.irq);
>          else
>              ret = 0;
> +        if ( is_hvm_domain(v->domain) &&
> +                domain_pirq_to_emuirq(v->domain, eoi.irq) > 0 )
> +        {
> +            struct hvm_irq *hvm_irq = &v->domain->arch.hvm_domain.irq;
> +            int gsi = domain_pirq_to_emuirq(v->domain, eoi.irq);
> +
> +            /* if this is a level irq and count > 0, send another
> +             * notification */ 
> +            if ( gsi >= NR_ISAIRQS /* ISA irqs are edge triggered */
> +                    && hvm_irq->gsi_assert_count[gsi] )
> +                send_guest_pirq(v->domain, eoi.irq);
> +        }
> +        spin_unlock(&v->domain->event_lock);
>          break;
>      }
>  
> @@ -323,9 +337,10 @@ ret_t do_physdev_op(int cmd, XEN_GUEST_H
>              break;
>          irq_status_query.flags = 0;
>          if ( is_hvm_domain(v->domain) &&
> -             domain_pirq_to_irq(v->domain, irq) <= 0 )
> +                domain_pirq_to_irq(v->domain, irq) <= 0 &&
> +                domain_pirq_to_emuirq(v->domain, irq) == IRQ_UNBOUND )
>          {
> -            ret = copy_to_guest(arg, &irq_status_query, 1) ? -EFAULT : 0;
> +            ret = -EINVAL;
>              break;
>          }
>  
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