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Date: Sun, 14 Jun 2009 12:50:16 +0300
From: "Michael S. Tsirkin" <mst@redhat.com>
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: Mark McLoughlin <markmc@redhat.com>
Cc: Carsten Otte <cotte@de.ibm.com>, kvm@vger.kernel.org, Glauber Costa <glommer@redhat.com>, Rusty Russell <rusty@rustcorp.com.au>, 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 <avi@redhat.com>

On Fri, Jun 12, 2009 at 05:48:23PM +0100, Mark McLoughlin wrote:
> However, in order to retain compat for that SCSI device (e.g. ensuring
> the PCI address doesn't change as other devices are added an removed),
> we're back to the same problem ... either:
> 
>   1) Use '-drive file=foo.img,if=scsi,pci_addr=foo'; in order to figure 
>      out what address to use, libvirt would need to query qemu for what 
>      address was originally allocated to device or it would do all the 
>      PCI address allocation itself ... 

This last option makes sense to me: in a real world the user has
control over where he places the device on the bus, so why
not with qemu?

-- 
MST