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Diffstat (limited to 'arch/mips/kernel/perf_event_mipsxx.c')
-rw-r--r--arch/mips/kernel/perf_event_mipsxx.c91
1 files changed, 40 insertions, 51 deletions
diff --git a/arch/mips/kernel/perf_event_mipsxx.c b/arch/mips/kernel/perf_event_mipsxx.c
index ee73550f0b9a..413863508f6f 100644
--- a/arch/mips/kernel/perf_event_mipsxx.c
+++ b/arch/mips/kernel/perf_event_mipsxx.c
@@ -129,20 +129,14 @@ static struct mips_pmu mipspmu;
#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
-static int cpu_has_mipsmt_pertccounters;
-
static DEFINE_RWLOCK(pmuint_rwlock);
#if defined(CONFIG_CPU_BMIPS5000)
#define vpe_id() (cpu_has_mipsmt_pertccounters ? \
0 : (smp_processor_id() & MIPS_CPUID_TO_COUNTER_MASK))
#else
-/*
- * FIXME: For VSMP, vpe_id() is redefined for Perf-events, because
- * cpu_data[cpuid].vpe_id reports 0 for _both_ CPUs.
- */
#define vpe_id() (cpu_has_mipsmt_pertccounters ? \
- 0 : smp_processor_id())
+ 0 : cpu_vpe_id(&current_cpu_data))
#endif
/* Copied from op_model_mipsxx.c */
@@ -329,7 +323,11 @@ static int mipsxx_pmu_alloc_counter(struct cpu_hw_events *cpuc,
static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
{
+ struct perf_event *event = container_of(evt, struct perf_event, hw);
struct cpu_hw_events *cpuc = this_cpu_ptr(&cpu_hw_events);
+#ifdef CONFIG_MIPS_MT_SMP
+ unsigned int range = evt->event_base >> 24;
+#endif /* CONFIG_MIPS_MT_SMP */
WARN_ON(idx < 0 || idx >= mipspmu.num_counters);
@@ -337,11 +335,37 @@ static void mipsxx_pmu_enable_event(struct hw_perf_event *evt, int idx)
(evt->config_base & M_PERFCTL_CONFIG_MASK) |
/* Make sure interrupt enabled. */
MIPS_PERFCTRL_IE;
- if (IS_ENABLED(CONFIG_CPU_BMIPS5000))
+
+#ifdef CONFIG_CPU_BMIPS5000
+ {
/* enable the counter for the calling thread */
cpuc->saved_ctrl[idx] |=
(1 << (12 + vpe_id())) | BRCM_PERFCTRL_TC;
+ }
+#else
+#ifdef CONFIG_MIPS_MT_SMP
+ if (range > V) {
+ /* The counter is processor wide. Set it up to count all TCs. */
+ pr_debug("Enabling perf counter for all TCs\n");
+ cpuc->saved_ctrl[idx] |= M_TC_EN_ALL;
+ } else
+#endif /* CONFIG_MIPS_MT_SMP */
+ {
+ unsigned int cpu, ctrl;
+
+ /*
+ * Set up the counter for a particular CPU when event->cpu is
+ * a valid CPU number. Otherwise set up the counter for the CPU
+ * scheduling this thread.
+ */
+ cpu = (event->cpu >= 0) ? event->cpu : smp_processor_id();
+ ctrl = M_PERFCTL_VPEID(cpu_vpe_id(&cpu_data[cpu]));
+ ctrl |= M_TC_EN_VPE;
+ cpuc->saved_ctrl[idx] |= ctrl;
+ pr_debug("Enabling perf counter for CPU%d\n", cpu);
+ }
+#endif /* CONFIG_CPU_BMIPS5000 */
/*
* We do not actually let the counter run. Leave it until start().
*/
@@ -655,13 +679,14 @@ static unsigned int mipspmu_perf_event_encode(const struct mips_perf_event *pev)
* event_id.
*/
#ifdef CONFIG_MIPS_MT_SMP
- return ((unsigned int)pev->range << 24) |
- (pev->cntr_mask & 0xffff00) |
- (pev->event_id & 0xff);
-#else
- return (pev->cntr_mask & 0xffff00) |
- (pev->event_id & 0xff);
-#endif
+ if (num_possible_cpus() > 1)
+ return ((unsigned int)pev->range << 24) |
+ (pev->cntr_mask & 0xffff00) |
+ (pev->event_id & 0xff);
+ else
+#endif /* CONFIG_MIPS_MT_SMP */
+ return ((pev->cntr_mask & 0xffff00) |
+ (pev->event_id & 0xff));
}
static const struct mips_perf_event *mipspmu_map_general_event(int idx)
@@ -1265,37 +1290,6 @@ static const struct mips_perf_event xlp_cache_map
},
};
-#ifdef CONFIG_MIPS_MT_SMP
-static void check_and_calc_range(struct perf_event *event,
- const struct mips_perf_event *pev)
-{
- struct hw_perf_event *hwc = &event->hw;
-
- if (event->cpu >= 0) {
- if (pev->range > V) {
- /*
- * The user selected an event that is processor
- * wide, while expecting it to be VPE wide.
- */
- hwc->config_base |= M_TC_EN_ALL;
- } else {
- /*
- * FIXME: cpu_data[event->cpu].vpe_id reports 0
- * for both CPUs.
- */
- hwc->config_base |= M_PERFCTL_VPEID(event->cpu);
- hwc->config_base |= M_TC_EN_VPE;
- }
- } else
- hwc->config_base |= M_TC_EN_ALL;
-}
-#else
-static void check_and_calc_range(struct perf_event *event,
- const struct mips_perf_event *pev)
-{
-}
-#endif
-
static int __hw_perf_event_init(struct perf_event *event)
{
struct perf_event_attr *attr = &event->attr;
@@ -1331,10 +1325,6 @@ static int __hw_perf_event_init(struct perf_event *event)
*/
hwc->config_base = MIPS_PERFCTRL_IE;
- /* Calculate range bits and validate it. */
- if (num_possible_cpus() > 1)
- check_and_calc_range(event, pev);
-
hwc->event_base = mipspmu_perf_event_encode(pev);
if (PERF_TYPE_RAW == event->attr.type)
mutex_unlock(&raw_event_mutex);
@@ -1723,7 +1713,6 @@ init_hw_perf_events(void)
}
#ifdef CONFIG_MIPS_PERF_SHARED_TC_COUNTERS
- cpu_has_mipsmt_pertccounters = read_c0_config7() & (1<<19);
if (!cpu_has_mipsmt_pertccounters)
counters = counters_total_to_per_cpu(counters);
#endif