diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/sbi/sbi_pmu.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/lib/sbi/sbi_pmu.c b/lib/sbi/sbi_pmu.c index 376afec1..a209c8e2 100644 --- a/lib/sbi/sbi_pmu.c +++ b/lib/sbi/sbi_pmu.c @@ -256,7 +256,7 @@ static int pmu_ctr_enable_irq_hw(int ctr_idx) #if __riscv_xlen == 32 mhpmevent_csr = CSR_MHPMEVENT3H + ctr_idx - 3; - of_mask = ~MHPMEVENTH_OF; + of_mask = (uint32_t)~MHPMEVENTH_OF; #else mhpmevent_csr = CSR_MHPMEVENT3 + ctr_idx - 3; of_mask = ~MHPMEVENT_OF; @@ -470,9 +470,13 @@ static int pmu_update_hw_mhpmevent(struct sbi_pmu_hw_event *hw_evt, int ctr_idx, if (!mhpmevent_val || ctr_idx < 3 || ctr_idx >= SBI_PMU_HW_CTR_MAX) return SBI_EFAIL; - /* Always clear the OVF bit and inhibit countin of events in M-mode */ + /** + * Always set the OVF bit(disable interrupts) and inhibit counting of + * events in M-mode. The OVF bit should be enabled during the start call. + */ if (sbi_hart_has_feature(scratch, SBI_HART_HAS_SSCOFPMF)) - mhpmevent_val = (mhpmevent_val & ~MHPMEVENT_SSCOF_MASK) | MHPMEVENT_MINH; + mhpmevent_val = (mhpmevent_val & ~MHPMEVENT_SSCOF_MASK) | + MHPMEVENT_MINH | MHPMEVENT_OF; /* Update the inhibit flags based on inhibit flags received from supervisor */ pmu_update_inhibit_flags(flags, &mhpmevent_val); |