Commit eaacf07d authored by Kan Liang's avatar Kan Liang Committed by Peter Zijlstra
Browse files

perf/x86: Hybrid PMU support for unconstrained 



The unconstrained value depends on the number of GP and fixed counters.
Each hybrid PMU should use its own unconstrained.

Suggested-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/1618237865-33448-8-git-send-email-kan.liang@linux.intel.com
parent d4b294bf

arch/x86/events/intel/core.c

+1 −1
Original line number Diff line number Diff line
@@ -3147,7 +3147,7 @@ x86_get_event_constraints(struct cpu_hw_events *cpuc, int idx, 
		}

	}



	return &unconstrained;

	return &hybrid_var(cpuc->pmu, unconstrained);

}



static struct event_constraint *

arch/x86/events/perf_event.h

+11 −0
Original line number Diff line number Diff line
@@ -638,6 +638,7 @@ struct x86_hybrid_pmu { 
	int				max_pebs_events;

	int				num_counters;

	int				num_counters_fixed;

	struct event_constraint		unconstrained;

};



static __always_inline struct x86_hybrid_pmu *hybrid_pmu(struct pmu *pmu)
@@ -658,6 +659,16 @@ extern struct static_key_false perf_is_hybrid; 
	__Fp;						\

}))



#define hybrid_var(_pmu, _var)				\

(*({							\

	typeof(&_var) __Fp = &_var;			\

							\

	if (is_hybrid() && (_pmu))			\

		__Fp = &hybrid_pmu(_pmu)->_var;		\

							\

	__Fp;						\

}))



/*

 * struct x86_pmu - generic x86 pmu

 */