Re: [Qemu-devel] [PATCH 2/2 RFC] s390x/pci: rework pci infrastructure modeling

[Frank Blaschka]

On Wed, Mar 11, 2015 at 03:57:05PM +0100, Michael S. Tsirkin wrote:
> On Wed, Mar 11, 2015 at 03:38:44PM +0100, Frank Blaschka wrote:
> > I like Alex's idea because:
> > 1) It reflects pretty well the actual nature of the pci system in real s390 
> > hw
> 
> why do you say this? does real hw has this
> one device per bridge limit?
> 
Actually we don't know. HW does not expose this information. All we know is each
pci function is completely separated. So it is a good assumption to have a 
separate
bridge/bus for each pci function. By the way the Linux kernel for s390 makes the
same assumption by creating a new pci domain for each function. You may want
to read the cover letter again to get more technical details on this.