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lib: sbi: Reset the mhpmevent value upon counter reset

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The hardware solely relies on the event selector value in mhpmevent
to figure out what event to monitor using that counter. It should be
reset when counter reset happens.

Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
Signed-off-by: Atish Patra <atish.patra@wdc.com>
This commit is contained in:
Atish Patra
2021-11-08 10:53:03 -08:00
committed by Anup Patel
parent 0c304b6619
commit 1e147324f0
1 changed files with 17 additions and 1 deletions
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18
lib/sbi/sbi_pmu.c
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@@ -369,6 +369,20 @@ static int pmu_ctr_stop_fw(uint32_t cidx, uint32_t fw_evt_code)
return 0;
}
static int pmu_reset_hw_mhpmevent(int ctr_idx)
{
if (ctr_idx < 3 || ctr_idx >= SBI_PMU_HW_CTR_MAX)
return SBI_EFAIL;
#if __riscv_xlen == 32
csr_write_num(CSR_MHPMEVENT3 + ctr_idx - 3, 0);
csr_write_num(CSR_MHPMEVENT3H + ctr_idx - 3, 0);
#else
csr_write_num(CSR_MHPMEVENT3 + ctr_idx - 3, 0);
#endif
return 0;
}
int sbi_pmu_ctr_stop(unsigned long cbase, unsigned long cmask,
unsigned long flag)
{
@@ -392,8 +406,10 @@ int sbi_pmu_ctr_stop(unsigned long cbase, unsigned long cmask,
else
ret = pmu_ctr_stop_hw(cbase);
if (!ret && (flag & SBI_PMU_STOP_FLAG_RESET))
if (flag & SBI_PMU_STOP_FLAG_RESET) {
active_events[hartid][cbase] = SBI_PMU_EVENT_IDX_INVALID;
pmu_reset_hw_mhpmevent(cbase);
}
}
return ret;