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SubjectRe: [PATCH 5/9] perf: Add sysfs format attribute for pmu device
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On Mon, 2012-01-16 at 13:31 +0100, Jiri Olsa wrote:
> Adding 'format' attribute for pmu device that contains
> a syntax description on how to construct raw events.
>
> The event configuration is described in following
> struct pefr_event_attr attributes:
>
> config
> config1
> config2
>
> Each line of the format file describes mapping of name
> and bitfield definition within one of abve attributes.
>
> eg:
> event config:0-7
> umask config:8-15
> usr config:16
> os config:17
> edge config:18
> any config:21
> inv config:23
> cmask config:24-31
>
> Line syntax:
> line: NAME config ':' bits
> config: 'config' | 'config1' | 'config2"
> bits: bits ',' bit_term | bit_term
> bit_term: VALUE '-' VALUE | VALUE
>
> Adding event_format callback to the struct pmu, which provides
> the format information. The pmu shall override this function
> and provide its own specific format information.
>
> If not overloaded the default format information is used:
>
> config config:0-63
> config1 config1:0-63
> config2 config2:0-63

Shouldn't config[012] be hard-coded like period? They are struct
perf_event_attr members after all and it doesn't really make sense to
have them dynamic if we're going to have to add them to all pmu/format
things.




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