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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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        Alexander Shishkin <alexander.shishkin@linux.intel.com>,
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        Mark Rutland <mark.rutland@arm.com>,
        Namhyung Kim <namhyung@kernel.org>,
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        Steve MacLean <Steve.MacLean@Microsoft.com>,
        Yonatan Goldschmidt <yonatan.goldschmidt@granulate.io>,
        Arnaldo Carvalho de Melo <acme@redhat.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.10 514/530] perf session: Add swap operation for event TIME_CONV
Date:   Wed, 12 May 2021 16:50:24 +0200
Message-Id: <20210512144836.650520829@linuxfoundation.org>
In-Reply-To: <20210512144819.664462530@linuxfoundation.org>
References: <20210512144819.664462530@linuxfoundation.org>
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From: Leo Yan <leo.yan@linaro.org>

[ Upstream commit 050ffc449008eeeafc187dec337d9cf1518f89bc ]

Since commit d110162cafc8 ("perf tsc: Support cap_user_time_short for
event TIME_CONV"), the event PERF_RECORD_TIME_CONV has extended the data
structure for clock parameters.

To be backwards-compatible, this patch adds a dedicated swap operation
for the event PERF_RECORD_TIME_CONV, based on checking if the event
contains field "time_cycles", it can support both for the old and new
event formats.

Fixes: d110162cafc8 ("perf tsc: Support cap_user_time_short for event TIME_CONV")
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Gustavo A. R. Silva <gustavoars@kernel.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steve MacLean <Steve.MacLean@Microsoft.com>
Cc: Yonatan Goldschmidt <yonatan.goldschmidt@granulate.io>
Link: https://lore.kernel.org/r/20210428120915.7123-4-leo.yan@linaro.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 tools/perf/util/session.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c
index 22098fffac4f..63b619084b34 100644
--- a/tools/perf/util/session.c
+++ b/tools/perf/util/session.c
@@ -945,6 +945,19 @@ static void perf_event__stat_round_swap(union perf_event *event,
 	event->stat_round.time = bswap_64(event->stat_round.time);
 }
 
+static void perf_event__time_conv_swap(union perf_event *event,
+				       bool sample_id_all __maybe_unused)
+{
+	event->time_conv.time_shift = bswap_64(event->time_conv.time_shift);
+	event->time_conv.time_mult  = bswap_64(event->time_conv.time_mult);
+	event->time_conv.time_zero  = bswap_64(event->time_conv.time_zero);
+
+	if (event_contains(event->time_conv, time_cycles)) {
+		event->time_conv.time_cycles = bswap_64(event->time_conv.time_cycles);
+		event->time_conv.time_mask = bswap_64(event->time_conv.time_mask);
+	}
+}
+
 typedef void (*perf_event__swap_op)(union perf_event *event,
 				    bool sample_id_all);
 
@@ -981,7 +994,7 @@ static perf_event__swap_op perf_event__swap_ops[] = {
 	[PERF_RECORD_STAT]		  = perf_event__stat_swap,
 	[PERF_RECORD_STAT_ROUND]	  = perf_event__stat_round_swap,
 	[PERF_RECORD_EVENT_UPDATE]	  = perf_event__event_update_swap,
-	[PERF_RECORD_TIME_CONV]		  = perf_event__all64_swap,
+	[PERF_RECORD_TIME_CONV]		  = perf_event__time_conv_swap,
 	[PERF_RECORD_HEADER_MAX]	  = NULL,
 };
 
-- 
2.30.2