[SeaBIOS] [Qemu-devel] [Seabios] [PATCH v2] seabios: restore piix pm config registers after resume

Kevin O'Connor kevin at koconnor.net
Wed Jan 15 17:04:55 CET 2014


On Wed, Jan 15, 2014 at 02:24:40PM +0200, Marcel Apfelbaum wrote:
> On Wed, 2014-01-15 at 14:20 +0200, Marcel Apfelbaum wrote:
> > On resume, the OS queries the power management event that
> > caused it. In order to complete this task, it executes some
> > reads to the piix pm io space. This all happens before the
> > OS has a chance to restore the PCI config space for devices,
> > so it is bios's responsibility to make sure the pm IO space
> > is configured correctly. (During suspend, the piix pm
> > configuration space is lost).
> > 
> > Note: For 'ordinary' pci devices the config space is
> > saved by the OS on sleep and restored on resume.
> > 
> > Signed-off-by: Marcel Apfelbaum <marcel.a at redhat.com>
> 
> Ooops! I put a [Qemu-devel] prefix, it is going to be a problem?

I fixed it up.  The patch also had two header files declaring
pci_resume() - I fixed that up as well.  It's been committed.

Thanks.

-Kevin



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