sparc64: Allow max hw perf events to be variable.

Now specified in sparc_pmu descriptor.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 7 insertions, 3 deletions

diff --git a/arch/sparc/kernel/perf_event.c b/arch/sparc/kernel/perf_event.c
index 11b424bb0b2b..f7b9ae39c264 100644
--- a/arch/sparc/kernel/perf_event.c
+++ b/arch/sparc/kernel/perf_event.c
@@ -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;