641cc93881
Adding sysfs group '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 sysfs attribute within the format attribute group, describes mapping of name and bitfield definition within one of above attributes. eg: "/sys/...<dev>/format/event" contains "config:0-7" "/sys/...<dev>/format/umask" contains "config:8-15" "/sys/...<dev>/format/usr" contains "config:16" the attribute value syntax is: line: config ':' bits config: 'config' | 'config1' | 'config2" bits: bits ',' bit_term | bit_term bit_term: VALUE '-' VALUE | VALUE Adding format attribute definitions for x86 cpu pmus. Acked-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Jiri Olsa <jolsa@redhat.com> Link: http://lkml.kernel.org/n/tip-vhdk5y2hyype9j63prymty36@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
15 lines
517 B
Plaintext
15 lines
517 B
Plaintext
Where: /sys/bus/event_source/devices/<dev>/format
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Date: January 2012
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Kernel Version: 3.3
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Contact: Jiri Olsa <jolsa@redhat.com>
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Description:
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Attribute group to describe the magic bits that go into
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perf_event_attr::config[012] for a particular pmu.
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Each attribute of this group defines the 'hardware' bitmask
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we want to export, so that userspace can deal with sane
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name/value pairs.
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Example: 'config1:1,6-10,44'
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Defines contents of attribute that occupies bits 1,6-10,44 of
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perf_event_attr::config1.
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