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Commit 59660495 authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Allow max hw perf events to be variable. 



Now specified in sparc_pmu descriptor.

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent b38e99f5

arch/sparc/kernel/perf_event.c

+7 −3
Original line number Diff line number Diff line
@@ -151,6 +151,7 @@ struct sparc_pmu { 
	unsigned int			flags;

#define SPARC_PMU_ALL_EXCLUDES_SAME	0x00000001

#define SPARC_PMU_HAS_CONFLICTS		0x00000002

	int				max_hw_events;

};



static const struct perf_event_map ultra3_perfmon_event_map[] = {
@@ -277,6 +278,7 @@ static const struct sparc_pmu ultra3_pmu = { 
	.lower_nop	= 0x14,

	.flags		= (SPARC_PMU_ALL_EXCLUDES_SAME |

			   SPARC_PMU_HAS_CONFLICTS),

	.max_hw_events	= 2,

};



/* Niagara1 is very limited.  The upper PIC is hard-locked to count
@@ -408,6 +410,7 @@ static const struct sparc_pmu niagara1_pmu = { 
	.lower_nop	= 0x0,

	.flags		= (SPARC_PMU_ALL_EXCLUDES_SAME |

			   SPARC_PMU_HAS_CONFLICTS),

	.max_hw_events	= 2,

};



static const struct perf_event_map niagara2_perfmon_event_map[] = {
@@ -538,6 +541,7 @@ static const struct sparc_pmu niagara2_pmu = { 
	.lower_nop	= 0x220,

	.flags		= (SPARC_PMU_ALL_EXCLUDES_SAME |

			   SPARC_PMU_HAS_CONFLICTS),

	.max_hw_events	= 2,

};



static const struct sparc_pmu *sparc_pmu __read_mostly;
@@ -950,7 +954,7 @@ static int sparc_check_constraints(struct perf_event **evts, 
	if (!n_ev)

		return 0;



	if (n_ev > MAX_HWEVENTS)

	if (n_ev > sparc_pmu->max_hw_events)

		return -1;



	if (!(sparc_pmu->flags & SPARC_PMU_HAS_CONFLICTS)) {
@@ -1078,7 +1082,7 @@ static int sparc_pmu_add(struct perf_event *event, int ef_flags) 
	perf_pmu_disable(event->pmu);



	n0 = cpuc->n_events;

	if (n0 >= MAX_HWEVENTS)

	if (n0 >= sparc_pmu->max_hw_events)

		goto out;



	cpuc->event[n0] = event;
@@ -1174,7 +1178,7 @@ static int sparc_pmu_event_init(struct perf_event *event) 
	n = 0;

	if (event->group_leader != event) {

		n = collect_events(event->group_leader,

				   MAX_HWEVENTS - 1,

				   sparc_pmu->max_hw_events - 1,

				   evts, events, current_idx_dmy);

		if (n < 0)

			return -EINVAL;