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There are a number of free running counters introduced for uncore, which provide highly valuable information to a wide array of customers. However, the generic uncore code doesn't support them yet. The free running counters will be specially handled based on their unique attributes: - They are read-only. They cannot be enabled/disabled. - The event and the counter are always 1:1 mapped. It doesn't need to be assigned nor tracked by event_list. - They are always active. It doesn't need to check the availability. - They have different bit width. Also, using inline helpers to replace the check for fixed counter and free running counter. Signed-off-by: Kan Liang <kan.liang@intel.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: acme@kernel.org Cc: eranian@google.com Link: http://lkml.kernel.org/r/1525371913-10597-5-git-send-email-kan.liang@intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org> |
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| intel | ||
| core.c | ||
| Kconfig | ||
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| msr.c | ||
| perf_event.h | ||