linux-kernel - [PATCH v3 9/9] perf mem: Document event type 'ldst'

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Message-Id: <20201028063813.8562-10-leo.yan@linaro.org>
Date:   Wed, 28 Oct 2020 14:38:13 +0800
From:   Leo Yan <leo.yan@...aro.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        Kemeng Shi <shikemeng@...wei.com>,
        "Naveen N. Rao" <naveen.n.rao@...ux.vnet.ibm.com>,
        Ian Rogers <irogers@...gle.com>, Al Grant <Al.Grant@....com>,
        James Clark <james.clark@....com>,
        Wei Li <liwei391@...wei.com>,
        André Przywara <andre.przywara@....com>,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     Leo Yan <leo.yan@...aro.org>
Subject: [PATCH v3 9/9] perf mem: Document event type 'ldst'

The event type 'ldst' is added for recording both load and store memory
operations, this patch documents for the new event type.

Signed-off-by: Leo Yan <leo.yan@...aro.org>
---
 tools/perf/Documentation/perf-mem.txt | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/tools/perf/Documentation/perf-mem.txt b/tools/perf/Documentation/perf-mem.txt
index 199ea0f0a6c0..c50ef37dba72 100644
--- a/tools/perf/Documentation/perf-mem.txt
+++ b/tools/perf/Documentation/perf-mem.txt
@@ -38,7 +38,11 @@ OPTIONS
 
 -t::
 --type=<type>::
-	Select the memory operation type: load or store (default: load,store)
+	Select the memory operation type: load, store, ldst (default: load,store).
+	The type 'ldst' means the single event can record both for load and store
+	operations; Intel and PowerPC support the types 'load' and 'store' but
+	'ldst' cannot be used; on Arm64, it uses Arm SPE as memory events and
+	user needs to specify one of these three types.
 
 -D::
 --dump-raw-samples::
-- 
2.17.1