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Date: Mon, 15 Jun 2009 07:52:17 -0500
From: Anthony Liguori <anthony@codemonkey.ws>
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Subject: Re: Configuration vs. compat hints [was Re: [Qemu-devel] [PATCHv3
	03/13] qemu: add routines to manage PCI capabilities]
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To: Avi Kivity <avi@redhat.com>
Cc: Carsten Otte <cotte@de.ibm.com>, Rusty Russell <rusty@rustcorp.com.au>, kvm@vger.kernel.org, Mark McLoughlin <markmc@redhat.com>, Glauber Costa <glommer@redhat.com>, "Michael S. Tsirkin" <mst@redhat.com>, qemu-devel@nongnu.org, virtualization@lists.linux-foundation.org, Blue Swirl <blauwirbel@gmail.com>, Christian Borntraeger <borntraeger@de.ibm.com>, Paul Brook <paul@codesourcery.com>

Avi Kivity wrote:
> On 06/15/2009 03:41 PM, Michael S. Tsirkin wrote:
>> We should just tell the user which slots are open.
>>   
>> This might be tricky if the config is passed in with the command line
>> flags.
>>    
>
> qemu -show-available-pci-slots

Why does the user care?

Let QEMU allocate the PCI slot, then query it to see what slot it 
assigned and remember that.

It's not a good idea to have management applications attempt to do PCI 
slot allocation.  For instance, one day we may decide to make virtio 
devices multi-function.

Regards,

Anthony Liguori