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

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Mon, Mar 18, 2013 at 07:02:42PM +0200, Pasi Kärkkäinen wrote:
> On Mon, Mar 18, 2013 at 09:06:59AM -0400, Konrad Rzeszutek Wilk wrote:
> > > On my box, I took the SSDT but it did not give any insight, except that
> > > the _PDC and _OSC end up calling in the  \_PR.OSC method pasted above:
> > > 
> > >     Scope (\_PR)                                                          
> > >       
> > >     {                                                                     
> > >       
> > >         Processor (P000, 0x01, 0x00000410, 0x06)                          
> > >       
> > >         {                             
> > > .. snip..                                          
> > >             Method (_OSC, 4, NotSerialized)                               
> > >       
> > >             {                                                             
> > >       
> > >                 Return (\_PR.OSC)                                         
> > >       
> > >                 Arg0                                                      
> > >       
> > >                 Arg1                                                      
> > >       
> > >                 Arg2                                                      
> > >       
> > >                 Arg3                                                      
> > >       
> > >             }                                                             
> > >       
> > >         }                                                                 
> > >       
> > >                                       
> > >     }
> > > 
> > > It looks like the magic incantations are in:
> > > 
> > >         OperationRegion (CSDT, SystemMemory, 0xBAE0BE18, 0x0084)
> > > 
> > > so physical address 0xBAE0BE18. The machine is offline so it will have
> > > to wait until I can get the contents of that physical address.
> > 
> > 
> > And if I dug deep enough and looked in: /sys/firmware/acpi/tables/dynamic/
> > I would have found SSDT2 and SSDT3 and SSDT2 sure enough has:
> > 
> >   Scope (\_PR.P000)
> >     {
> >         Name (_PCT, Package (0x02)
> >         {
> > 
> > . .. snip..
> > 
> > and also the _PSS, _PPC, etc.
> >
> 
> Hmm, on the R510 server where xen-acpi-processor doesn't work 
> /sys/firmware/acpi/tables/dynamic/ is empty.. 

Pfff.. And 'cpuinfo' or 'cpufreq-info' when you boot baremetal gives
you different P-states?

If so, is the DSDT different that when running under Xen? And
lasty, does it create any SSDT in the dynamic directory?

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