Re: [PATCH 1/1] perf, Add support for Xeon-Phi PMU

[Peter Zijlstra]

On Tue, 2012-09-25 at 15:42 +0400, Cyrill Gorcunov wrote:

> Guys, letme re-read this whole mail thread first since I have no clue
> what this remapping about ;)

x86_setup_perfctr() / set_ext_hw_attr() have special purposed 0 and -1
config values to mean -ENOENT and -EINVAL resp.

This means neither config value can be a 'real' event. Now it turns out
Xeon-Phi has an actual event 0, which is masked by these special case
thingies.
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