[PATCH 0/2] oprofile support for ppc750

[Octavian Purdila]

From: Benjamin Herrenschmidt <benh at kernel.crashing.org>

> On Tue, 2009-01-06 at 14:55 +0200, Octavian Purdila wrote:
> > Adds oprofile support for ppc750. ppc750 performance counters
> > interface is similar with G4, but it only has 4 performance counters
> > instead of 6.
> >
> > I tested this on a PPC750GX and it seems to work fine.
>
> I'm not too sure about using the same model as 74xx... 

I've double checked the bits, and it looks to me that what is implemented in 
op_model_7450.c maps with my User’s Manual IBM PowerPC 750GX and 750GL RISC 
Microprocessor copy :)


> I have some
> patches that haven't been released yet from Jack Miller to implement the
> full OP support for 750 but they appear to cause crashes.
>

Were they posted somewhere?

> There is a known HW bug in various 750's that basically make the
> performance interrupt unuseable. I -think- it may have been fixed in the
> very latest revision of the 750CL though but I'm not sure.

Yeah, I've read that somewhere, but I did not notice any issues with 750GX I 
am using - so far.

Thanks,
tavi