Re: Bug in pci-detach (Was: Re: [Xen-devel] Re: VT-d HowTo Update)

[Akio Takebe <takebe_akio@xxxxxxxxxxxxxx>]

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

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