Re: [PATCHv2 6/9] perf: expose perf capability to other modules.

[Peter Zijlstra]

On Mon, 2011-11-07 at 17:53 +0200, Gleb Natapov wrote:
> I removed branch-miss-retired here because for perf user it exists. Perf
> approximates it by other event but perf user shouldn't know that. A
> guest is not always runs with exactly same cpu model number as a host,
> so if we will not drop the bit here if guest will see cpu model other
> than the one that has this quirk it will not be able to use the event.

Right, so what model number do you expose? Anyway I don't really mind
masking the thing as long as we grow an ebx iteration,

> BTW why perf does not check event mask to see if architectural event is
> available before programming it? 

No idea why not.. just one of those things nobody noticed/got around to
doing or so.
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