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    powerpc/perf: Factor out PPMU_ONLY_COUNT_RUN check code from power8 · 70a7e720
    Madhavan Srinivasan 提交于
    There are some hardware events on Power systems which only count when
    the processor is not idle, and there are some fixed-function counters
    which count such events. For example, the "run cycles" event counts
    cycles when the processor is not idle. If the user asks to count
    cycles, we can use "run cycles" if this is a per-task event, since the
    processor is running when the task is running, by definition. We can't
    use "run cycles" if the user asks for "cycles" on a system-wide
    counter.
    
    Currently in power8 this check is done using PPMU_ONLY_COUNT_RUN flag
    in power8_get_alternatives() function. Based on the flag, events are
    switched if needed. This function should also be enabled in power9, so
    factor out the code to isa207_get_alternatives().
    
    Fixes: efe881af ('powerpc/perf: Factor out event_alternative function')
    Reported-by: NAnton Blanchard <anton@samba.org>
    Signed-off-by: NMadhavan Srinivasan <maddy@linux.vnet.ibm.com>
    Signed-off-by: NMichael Ellerman <mpe@ellerman.id.au>
    70a7e720
power8-pmu.c 9.2 KB