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

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Date:   Fri, 9 Jun 2023 15:56:08 +0800
From:   Junhao He <hejunhao3@...wei.com>
To:     <will@...nel.org>, <jonathan.cameron@...wei.com>,
        <linux-kernel@...r.kernel.org>, <mark.rutland@....com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-doc@...r.kernel.org>, <linuxarm@...wei.com>,
        <yangyicong@...wei.com>, <shenyang39@...wei.com>,
        <prime.zeng@...ilicon.com>, <hejunhao3@...wei.com>
Subject: [PATCH v4 3/3] docs: perf: Add new description for HiSilicon UC PMU

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>
---
 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