Re: [XenPPC] [PATCH/RFC] Run C code that inits HID registers from secondary procs

[Segher Boessenkool <segher@xxxxxxxxxxxxxxxxxxx>]

> Question to all:
> The "cpuid" from firmware (OF "reg" property) is significant only  
> to uniquely identify the interrupt line that FW assigned to it  
> (usually for IPIs).
Not firmware in most cases; it's "hardcoded" in the hardware.

> It is not necessarily the processors PIR register value, nor does  
> it have any other meaning.
You can set the PIR to whatever you want, it's R/W.

> Should we use it as our global index or use our own numbering system
You want to remap those numbers; they can be sparse (like, on a 970GX
system, the CPUs are 0 and 2 typically).


Segher


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