From mboxrd@z Thu Jan  1 00:00:00 1970
From: Akio Takebe <takebe_akio@jp.fujitsu.com>
Subject: Re: Bug in pci-detach (Was: Re: Re: VT-d HowTo Update)
Date: Wed, 22 Apr 2009 11:18:53 +0900
Message-ID: <49EE7E8D.6080102@jp.fujitsu.com>
References: <20090422014446.GA30419@verge.net.au>
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To: Simon Horman <horms@verge.net.au>
Cc: "xen-devel@lists.xensource.com" <xen-devel@lists.xensource.com>, "Zhai,
	Edwin" <edwin.zhai@intel.com>, "Cui, Dexuan" <dexuan.cui@intel.com>, "Han,
	Weidong" <weidong.han@intel.com>, Keir Fraser <keir.fraser@eu.citrix.com>, Christian Tramnitz <chris.ace@gmx.net>
List-Id: xen-devel@lists.xenproject.org

Hi, Simon

Simon Horman wrote:
> On Wed, Apr 22, 2009 at 09:11:58AM +1000, Simon Horman wrote:
>> On Tue, Apr 21, 2009 at 05:16:14PM +0800, Cui, Dexuan wrote:
>>> Simon Horman wrote:
>>>> Hi,
>>>>
>>>> in preparation for 3.4.0 I have made a number of updates to the VT-d
>>>> Howto. I have tried to retain the original information while
>>>> reorganising things a bit. I have also added information on recent
>>>> work I have done in this area. 
>>>>
>>>> Apologies in advance for any errors, accidental deletions, etc...
>>>>
>>>> http://wiki.xensource.com/xenwiki/VTdHowTo
>>> Hi Simon,
>>> There is a bug: we can't pci-detach a statically-assigned (I mean: use the pci string in hvm config file) devices for hvm guest.
>>> Accordong my limited experience, after a device is assigned to hvm guest, ioemu does write the correct vslots value into xenstore, but looks xend can't get the correct value somwhow.
>>> Could you help to have a look? Thanks!
>> Sure, I can look into that. Do you have a version that you are worried
>> about? It did seem to work the last time that I checked.
> 
> Hi Dexuan,
> 
> I am seeing this bug too. I'll try and get a fix ASAP.
> 

Does AUTO_PHP_SLOT also support hotplug?

@tools/python/xen/xend/XendDomainInfo.py

     def hvm_destroyPCIDevice(self, vslot):
         log.debug("hvm_destroyPCIDevice called %s", vslot)

         if not self.info.is_hvm():
             raise VmError("hvm_destroyPCIDevice called on non-HVM guest")
... snip ...
         if vslot == AUTO_PHP_SLOT:
             raise VmError("Device @ vslot 0x%x doesn't support hotplug." % (vslot))

Best Regards,

Akio Takebe