[PATCH v2 4/8] drivers/perf: hisi: Add new functions for HHA PMU

[Mark Rutland]

On Wed, Feb 03, 2021 at 03:51:04PM +0800, Shaokun Zhang wrote:
> On HiSilicon Hip09 platform, some new functions are also supported on
> HHA PMU, it can filter gathered statistics by the Master ID and mask
> from the SoC if the user wants to do deep-going profiling.
> Tracetag support is also added with L3C PMU in the SoC system.
> 
> $# perf stat -a -e hisi_sccl3_hha0/config=0x02,tracetag_en=0x1/ sleep 5
> 
> $# perf stat -a -e hisi_sccl3_hha0/config=0x02,srcid_cmd=0x1/ sleep 5
>
> Much more introduction is added in documentation:
> Documentation/admin-guide/perf/hisi-pmu.rst

Could we please enumerate the relevant fields here, with a brief
description? From a quick scan these are different to those added fo
rthe L3C PMU.

I appreciate the last partch in the series adds some documentation, but
it'd be nice to have the context where it's needed.

[...]

> @@ -193,6 +304,22 @@ static int hisi_hha_pmu_init_data(struct platform_device *pdev,
>  		dev_err(&pdev->dev, "Can not read hha sccl-id!\n");
>  		return -EINVAL;
>  	}
> +
> +	/*
> +	 * Early versions of BIOS support _UID by mistake, so we support
> +	 * both "hisilicon, idx-id" as preference, if availbale.

Typo: s/availbale/available/

Thanks,
Mark.