Re: [PATCH v6 5/6] perf vendor events arm64: Update stall_slot workaround for N2 r0p3

[John Garry]

On 16/08/2023 12:47, James Clark wrote:
> N2 r0p3 doesn't require the workaround [1], so gating on (#slots - 5) no
> longer works because all N2s have 5 slots. Use the new expression
> builtin that allows calling strcmp_cpuid_str() and comparing CPUIDs in
> metric formulas.
>
> In this case, the commented formula looks like this:
>
>    strcmp_cpuid_str(0x410fd493)        # greater than or equal to N2 r0p3
>    | strcmp_cpuid_str(0x410fd490) ^ 1  # OR NOT any version of N2
>
> [1]:https://urldefense.com/v3/__https://gitlab.arm.com/telemetry-solution/telemetry-solution/-/blob/main/data/pmu/cpu/neoverse/neoverse-n2-r0p3.json__;!!ACWV5N9M2RV99hQ!JvpXOAN-7zsKcA750zS-vMlcJKvvIZ_H9zg6jitWJRMitlFGDrx8bXoMrhdK5ubhO8CtXObRFx7bDYM2R5Feqg$  
> Signed-off-by: James Clark<james.clark@xxxxxxx>
> ---

Reviewed-by: John Garry <john.g.garry@xxxxxxxxxx>