Re: [Qemu-devel] [PATCH 00/25] q35 series take #1

[Jason Baron]

On Fri, Sep 14, 2012 at 12:29:17AM +0200, Alexander Graf wrote:
> On 13.09.2012, at 22:12, Jason Baron wrote:
> 
> > Hi,
> > 
> > Qemu bits for q35 support, I'm posting the seabios changes separately. The
> > patches require '-M pc_q35' and -L 'seabios dir with q35 changes' on the
> > qemu command line. Hopefully, we can make it the default for x86 at some 
> > future
> > point when we feel comfortable with it.
> 
> Without having had a real look at the code in detail yet, how did you design 
> the PCI-ISA bridge (LPC device)? I'm asking mostly because Mac OS X 
> unconditionally accesses that device's PCI config space to find the base 
> address of the HPET.
> 

The LPC device is inherits from TYPE_PCI_DEVICE, and has modeling for
configuring pmbase (where the power management io region resides) and
for configuring pirq irq routing. It does not have the addr for the
HPET. I'll have to check the spec and see where it resides.

> If it's not modeled at all right now, that would certainly be nice to have 
> before we make the machine the default. Until then I would mark it simply as 
> experimental and declare it unstable wrt version coherence.
> 

ok, I haven't played with Mac OS X yet on q35, but its something I would
really like to have working - my focus has been on linux and windows
guests.

Thanks,

-Jason