Re: [SeaBIOS] [PATCH] seabios: restore piix pm config registers after resume

[Kevin O'Connor]

On Mon, Jan 13, 2014 at 06:36:56PM +0200, Michael S. Tsirkin wrote:
> On Mon, Jan 13, 2014 at 11:31:20AM -0500, Kevin O'Connor wrote:
> > +void
> > +pci_resume(void)
> > +{
> > if (!CONFIG_QEMU)
> >    return;
> > if (PiixPMBDF >= 0)
>
> so this does nothing unless piix4_pm_setup run but
> if it did why do we need to resume anything?

PiixPMBDF is set during the SeaBIOS init phase.  The proposed
pci_resume() function is called during the resume phase.  The goal of
the proposed patch is to store the BDF during init so that it's
available during resume without requiring a bus scan.

-Kevin