Re: [PATCH 1/2] perf-events: Add support for supplementary eventregisters v2

[Andi Kleen]

On Mon, Nov 15, 2010 at 12:03:28PM +0100, Stephane Eranian wrote:
> On Sat, Nov 13, 2010 at 11:34 AM, Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> wrote:
> > On Sat, 2010-11-13 at 11:17 +0100, Andi Kleen wrote:
> >> > That would assume a single event doesn't contain offcore and lbr, no?
> >> > Currently the extra_reg thing assumes there's only one extra reg encoded
> >> > in the config word.
> >>
> >> It would not be too hard to make it an array if that's needed.
> >
> > I don't think we want to go there anyway, one extra_reg per config value
> > is fine.
> >
> I think offcore goes into .config, lbr goes into extra_reg. That should take
> care of combinations as well.

The context switch code needs extra_reg for any extra regs including 
offcore, I don't want to walk the event table for that.

-Andi

-- 
ak@xxxxxxxxxxxxxxx -- Speaking for myself only.
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