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Re: [Qemu-devel] [PATCH RESEND v3] xen: implement unplug protocol in xen


From: Kevin Wolf
Subject: Re: [Qemu-devel] [PATCH RESEND v3] xen: implement unplug protocol in xen_platform
Date: Wed, 27 Jul 2011 14:58:12 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:5.0) Gecko/20110707 Thunderbird/5.0

Am 27.07.2011 14:44, schrieb Alexander Graf:
> On 07/18/2011 06:07 PM, address@hidden wrote:
>> From: Stefano Stabellini<address@hidden>
>>
>> The unplug protocol is necessary to support PV drivers in the guest: the
>> drivers expect to be able to "unplug" emulated disks and nics before
>> initializing the Xen PV interfaces.
>> It is responsibility of the guest to make sure that the unplug is done
>> before the emulated devices or the PV interface start to be used.
>>
>> We use pci_for_each_device to walk the PCI bus, identify the devices and
>> disks that we want to disable and dynamically unplug them.
>>
>> Changes in v2:
>>
>> - use PCI_CLASS constants;
>>
>> - replace pci_unplug_device with qdev_unplug;
>>
>> - do not import hw/ide/internal.h in xen_platform.c;
>>
>>
>> Changes in v3:
>>
>> - introduce piix3-ide-xen, that support hot-unplug;
>>
>> - move the unplug code to hw/ide/piix.c;
>>
>> - just call qdev_unplug from xen_platform.c to unplug the IDE disks;
>>
>> Signed-off-by: Stefano Stabellini<address@hidden>
> 
> Kevin, please ack.

Trivial rebase of the version I already acked.

Acked-by: Kevin Wolf <address@hidden>



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