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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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