Re: [Qemu-devel] [PATCH] Revert "hw/pci: disable pci-bridge's shpc by default"

[Marcel Apfelbaum <marcel@redhat.com>]

----- Original Message -----
> From: "Paolo Bonzini" <pbonzini@redhat.com>
> To: "Marcel Apfelbaum" <marcel@redhat.com>, qemu-devel@nongnu.org
> Cc: qemu-stable@nongnu.org, mst@redhat.com
> Sent: Wednesday, May 10, 2017 6:38:45 PM
> Subject: Re: [Qemu-devel] [PATCH] Revert "hw/pci: disable pci-bridge's shpc by default"
> 
> 
> 
> On 10/05/2017 11:29, Marcel Apfelbaum wrote:
> > +++ b/hw/pci-bridge/pci_bridge_dev.c
> > @@ -163,7 +163,7 @@ static Property pci_bridge_dev_properties[] = {
> >      DEFINE_PROP_ON_OFF_AUTO(PCI_BRIDGE_DEV_PROP_MSI, PCIBridgeDev, msi,
> >                              ON_OFF_AUTO_AUTO),
> >      DEFINE_PROP_BIT(PCI_BRIDGE_DEV_PROP_SHPC, PCIBridgeDev, flags,
> > -                    PCI_BRIDGE_DEV_F_SHPC_REQ, false),
> > +                    PCI_BRIDGE_DEV_F_SHPC_REQ, true),
> >      DEFINE_PROP_END_OF_LIST(),
> >  };
> >  
> > diff --git a/include/hw/compat.h b/include/hw/compat.h
> > index 846b90e..eff021f 100644
> > --- a/include/hw/compat.h
> > +++ b/include/hw/compat.h
> > @@ -18,10 +18,6 @@
> >          .property = "old-multiple-chip-handling",\
> >          .value    = "on",\
> >      },{\
> > -        .driver   = "pci-bridge",\
> > -        .property = "shpc",\
> > -        .value    = "on",\
> > -    },{\
> 

Hi Paolo,

> Unless we make a conscious decision to break PCI bridge backwards
> compatibility, you now have to disable it for 2.9 and leave this
> HW_COMPAT_2_8 hunk intact.  Peter Xu has a patch to add the 2.10 machine
> types.
> 

I thought is not an interesting enough scenario to keep it "broken" for 2.9,
but I'll do that, sure, I'll add it on top of Peter's patch.

Thanks,
Marcel

> Paolo
> 
> >          .driver   = TYPE_PCI_DEVICE,\
> >          .property = "x-pcie-extcap-init",\
> >          .value    = "off",\
> > -- 2.9.3
>