Re: [Xen-devel] [PATCH 1.1 V2] xen: Fix PV-on-HVM

[Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>]

On Wed, 16 May 2012, Anthony PERARD wrote:
> In the context of PV-on-HVM under Xen, the emulated nics are supposed to be
> unplug before the guest drivers are initialized, when the guest write to a
> specific IO port.
> 
> Without this patch, the guest end up with two nics with the same MAC, the
> emulated nic and the PV nic.
> 
> Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>

Is this patch required in qemu-upstream-unstable.git too?
If so, could you please provide a backport?



>  hw/xen_platform.c |    5 ++++-
>  1 files changed, 4 insertions(+), 1 deletions(-)
> 
> diff --git a/hw/xen_platform.c b/hw/xen_platform.c
> index a9c52a6..0214f37 100644
> --- a/hw/xen_platform.c
> +++ b/hw/xen_platform.c
> @@ -87,7 +87,10 @@ static void unplug_nic(PCIBus *b, PCIDevice *d)
>  {
>      if (pci_get_word(d->config + PCI_CLASS_DEVICE) ==
>              PCI_CLASS_NETWORK_ETHERNET) {
> -        qdev_unplug(&(d->qdev), NULL);
> +        /* Until qdev_free includes a call to object_unparent, we call it 
> here
> +         */
> +        object_unparent(&d->qdev.parent_obj);
> +        qdev_free(&d->qdev);
>      }
>  }
>  
> -- 
> Anthony PERARD
> 

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