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Alexandre GhitiandAnup Patel 674e0199b2 lib: sbi: Fix counter index calculation for SBI_PMU_CFG_FLAG_SKIP_MATCH 
As per the SBI specification, we should "unconditionally select the first
counter from the set of counters specified by the counter_idx_base and
counter_idx_mask", so implement this behaviour.

Suggested-by: Atish Patra <atishp@atishpatra.org>
Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
 2023-04-17 09:26:28 +05:30
Alexandre GhitiandAnup Patel bdb3c42bca lib: sbi: Do not clear active_events for cycle/instret when stopping 
Those events are enabled by default and should not be reset afterwards
since when using SBI_PMU_CFG_FLAG_SKIP_MATCH, it leads to unaccessible
counters after the first use.

Signed-off-by: Alexandre Ghiti <alexghiti@rivosinc.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
 2023-04-17 09:26:26 +05:30