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[Xen-devel] Re: [Qemu-devel] [PATCH] xen: fix interrupt routing

To: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
Subject: [Xen-devel] Re: [Qemu-devel] [PATCH] xen: fix interrupt routing
From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
Date: Thu, 19 May 2011 20:16:59 +0100
Cc: "agraf@xxxxxxx" <agraf@xxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, "qemu-devel@xxxxxxxxxx" <qemu-devel@xxxxxxxxxx>, Stefano Stabellini <Stefano.Stabellini@xxxxxxxxxxxxx>
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On Thu, 19 May 2011, Isaku Yamahata wrote:
> On Wed, May 18, 2011 at 06:53:40PM +0100, stefano.stabellini@xxxxxxxxxxxxx 
> wrote:
> > From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> > 
> > Match the routing informations built by seabios:
> > 
> > - remove i440fx_write_config_xen
> > we don't need to intercept pci config writes to i440FX;
> > 
> > - introduce piix3_write_config_xen
> > we do need to intercept pci config write to the PCI-ISA bridge to update
> > the PCI link routing;
> So "i440FX-xen" isn't needed anymore, and something like PIIX3-xen
> is necessary instead of overwriting piix3->dev.config_write.

That is a good idea. I am also going to remove i440fx_xen_init to get rid of
a 'if (xen_enabled())' but to do that I have to move the call to
pci_bus_irqs in i440fx_common_init.

I'll send an update of the patch as soon as we figure out what to do
with the BIOS tables.

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