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add null event check logic in riscv_pmu_sbi.c 

Signed-off-by: lin peng <peng.lin@sophgo.com>
This commit is contained in:
lin peng 2024-08-17 14:13:03 +08:00 committed by Xiaoguang Xing
parent 7cb1cba6b2
commit fbae4bce18
1 changed files with 11 additions and 9 deletions
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20
drivers/perf/riscv_pmu_sbi.c
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@ -650,18 +650,20 @@ static inline void pmu_sbi_start_overflow_mask(struct riscv_pmu *pmu,
/* Reinitialize and start all the counter that overflowed */
while (ctr_ovf_mask) {
if (ctr_ovf_mask & 0x01) {
event = cpu_hw_evt->events[idx];
hwc = &event->hw;
max_period = riscv_pmu_ctr_get_width_mask(event);
init_val = local64_read(&hwc->prev_count) & max_period;
if(event) {
event = cpu_hw_evt->events[idx];
hwc = &event->hw;
max_period = riscv_pmu_ctr_get_width_mask(event);
init_val = local64_read(&hwc->prev_count) & max_period;
#if defined(CONFIG_32BIT)
sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1,
flag, init_val, init_val >> 32, 0);
sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1,
flag, init_val, init_val >> 32, 0);
#else
sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1,
flag, init_val, 0, 0);
sbi_ecall(SBI_EXT_PMU, SBI_EXT_PMU_COUNTER_START, idx, 1,
flag, init_val, 0, 0);
#endif
perf_event_update_userpage(event);
perf_event_update_userpage(event);
}
}
ctr_ovf_mask = ctr_ovf_mask >> 1;
idx++;