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docs: pmu: Update the pmu doc with removal of mcountinhbit restriction 

Since commit b28f070, it is possible for platforms to run perf monitoring
even if mcountinhibit is not supported. Sampling still won't be possible
though as it requires sscofpmf extension.

Update the docs to remove the restriction.

Signed-off-by: Atish Patra <atishp@rivosinc.com>
Reviewed-by: Anup Patel <anup@brainfault.org>
This commit is contained in:
Atish Patra 2022-12-22 12:38:50 -08:00 committed by Anup Patel
parent 0412460baf
commit d5d12a91d1
1 changed files with 0 additions and 3 deletions
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docs/pmu_support.md
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@ -6,9 +6,6 @@ capability of performance analysis tools such as perf if SBI PMU extension is
enabled. The OpenSBI implementation makes the following assumptions about the
hardware platform.
* MCOUNTINHIBIT CSR must be implemented in the hardware. Otherwise, SBI PMU
extension will not be enabled.
* The platform must provide information about PMU event to counter mapping
via device tree or platform specific hooks. Otherwise, SBI PMU extension will
not be enabled.