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Re: [Xen-devel] Linux 3.4 dom0 kernel error loading xen-acpi-processor: Input/output error

On Fri, Mar 15, 2013 at 09:37:06PM +0200, Pasi Kärkkäinen wrote:
> On Fri, Mar 15, 2013 at 05:19:34PM +0200, Pasi Kärkkäinen wrote:
> > 
> > > I need to look back at my notes on how the _PCT, _PSS, _Pwhatevername
> > > work.
> > >
> > 
> > Yep. Does xen-acpi-processor driver load OK on your servers? 
> > 
> I just tried Linux 3.8.3 as dom0 on the Xeon 5600 CPU and xen-acpi-processor 
> fails 
> in the same way as it fails with Linux 3.4.
> I also tested on my Ivy Bridge i7 desktop, and there xen-acpi-processor 
> driver loads OK..

And when I add some extra printks in working box I see that these calls:

        acpi_get_handle(pr->handle, "_PCT", &handle);
        acpi_get_handle(pr->handle, "_PSD", &handle);
        acpi_get_handle(pr->handle, "_PSS", &handle);

work, yet in the SSDT and DSDT those strings don't show up? I think this
requires some deep ACPI sorcery to figure out. On the AMD boxes they
nicely show up.

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