linux-kernel - Re: [PATCH v4 3/3] docs: perf: Add new description for HiSilicon UC PMU

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Message-ID: <ZILqF4F93sOCxLZh@FVFF77S0Q05N>
Date:   Fri, 9 Jun 2023 10:00:07 +0100
From:   Mark Rutland <mark.rutland@....com>
To:     Junhao He <hejunhao3@...wei.com>
Cc:     will@...nel.org, jonathan.cameron@...wei.com,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-doc@...r.kernel.org, linuxarm@...wei.com,
        yangyicong@...wei.com, shenyang39@...wei.com,
        prime.zeng@...ilicon.com
Subject: Re: [PATCH v4 3/3] docs: perf: Add new description for HiSilicon UC
 PMU

On Fri, Jun 09, 2023 at 03:56:08PM +0800, Junhao He wrote:
> A new function is added on HiSilicon uncore UC PMU.
> 
> The UC PMU support to filter statistical information based on
> the specified tx request uring channel. Make user configuration
> through "uring_channel" parameter.
> Document them to provide guidance on how to use them.
> 
> Signed-off-by: Junhao He <hejunhao3@...wei.com>
> Reviewed-by: Jonathan Cameron <Jonthan.Cameron@...wei.com>
> Reviewed-by: Yicong Yang <yangyicong@...ilicon.com>

Acked-by: Mark Rutland <mark.rutland@....com>

Mark.

> ---
>  Documentation/admin-guide/perf/hisi-pmu.rst | 8 ++++++++
>  1 file changed, 8 insertions(+)
> 
> diff --git a/Documentation/admin-guide/perf/hisi-pmu.rst b/Documentation/admin-guide/perf/hisi-pmu.rst
> index 546979360513..939a524fa1d6 100644
> --- a/Documentation/admin-guide/perf/hisi-pmu.rst
> +++ b/Documentation/admin-guide/perf/hisi-pmu.rst
> @@ -98,6 +98,14 @@ CCL/ICL-ID. For I/O die, the ICL-ID is followed by:
>  5'b00011: HAC_ICL;
>  5'b10000: PCIe_ICL;
>  
> +(e) uring_channel: UC PMU events 0x47~0x59 supports filtering by tx request
> +uring channel. It is 2 bits. Some important codes are as follows:
> +2'b11: count the events which sent to the uring_ext (MATA) channel;
> +2'b01: is the same as 2'b11;
> +2'b10: count the events which sent to the uring (non-MATA) channel;
> +2'b00: default value, count the events which sent to the both uring and
> +       uring_ext channel;
> +
>  Users could configure IDs to count data come from specific CCL/ICL, by setting
>  srcid_cmd & srcid_msk, and data desitined for specific CCL/ICL by setting
>  tgtid_cmd & tgtid_msk. A set bit in srcid_msk/tgtid_msk means the PMU will not
> -- 
> 2.33.0
>