diff options
Diffstat (limited to 'drivers/perf/riscv_pmu.c')
| -rw-r--r-- | drivers/perf/riscv_pmu.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/perf/riscv_pmu.c b/drivers/perf/riscv_pmu.c index c78a6fd6c57f..7644147d50b4 100644 --- a/drivers/perf/riscv_pmu.c +++ b/drivers/perf/riscv_pmu.c @@ -39,7 +39,6 @@ void arch_perf_update_userpage(struct perf_event *event, userpg->cap_user_time_short = 0; userpg->cap_user_rdpmc = riscv_perf_user_access(event); -#ifdef CONFIG_RISCV_PMU /* * The counters are 64-bit but the priv spec doesn't mandate all the * bits to be implemented: that's why, counter width can vary based on @@ -47,7 +46,6 @@ void arch_perf_update_userpage(struct perf_event *event, */ if (userpg->cap_user_rdpmc) userpg->pmc_width = to_riscv_pmu(event->pmu)->ctr_get_width(event->hw.idx) + 1; -#endif do { rd = sched_clock_read_begin(&seq); @@ -167,7 +165,7 @@ u64 riscv_pmu_event_update(struct perf_event *event) unsigned long cmask; u64 oldval, delta; - if (!rvpmu->ctr_read) + if (!rvpmu->ctr_read || (hwc->state & PERF_HES_UPTODATE)) return 0; cmask = riscv_pmu_ctr_get_width_mask(event); @@ -191,8 +189,6 @@ void riscv_pmu_stop(struct perf_event *event, int flags) struct hw_perf_event *hwc = &event->hw; struct riscv_pmu *rvpmu = to_riscv_pmu(event->pmu); - WARN_ON_ONCE(hwc->state & PERF_HES_STOPPED); - if (!(hwc->state & PERF_HES_STOPPED)) { if (rvpmu->ctr_stop) { rvpmu->ctr_stop(event, 0); @@ -313,6 +309,10 @@ static int riscv_pmu_event_init(struct perf_event *event) u64 event_config = 0; uint64_t cmask; + /* driver does not support branch stack sampling */ + if (has_branch_stack(event)) + return -EOPNOTSUPP; + hwc->flags = 0; mapped_event = rvpmu->event_map(event, &event_config); if (mapped_event < 0) { @@ -404,6 +404,7 @@ struct riscv_pmu *riscv_pmu_alloc(void) cpuc->n_events = 0; for (i = 0; i < RISCV_MAX_COUNTERS; i++) cpuc->events[i] = NULL; + cpuc->snapshot_addr = NULL; } pmu->pmu = (struct pmu) { .event_init = riscv_pmu_event_init, |