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[PATCH V3 10/26] coresight: etm3x: set progbit to stop trace collection

From Mathieu Poirier <mathieu.poirier@linaro.org>
Newsgroups linux.kernel
Subject [PATCH V3 10/26] coresight: etm3x: set progbit to stop trace collection
Date 2015-11-11 23:30 +0100
Message-ID <qtM3U-lk-45@gated-at.bofh.it> (permalink)
References <qtLUd-hJ-3@gated-at.bofh.it>
Organization linux.* mail to news gateway

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There is no need to use the event enable's "always false" event to
stop trace collection.  For that purpose setting the programming bit
(ETMCR:10) is enough.

Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
 drivers/hwtracing/coresight/coresight-etm3x.c | 3 ---
 1 file changed, 3 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c
index 5a2be0590754..d1235711b576 100644
--- a/drivers/hwtracing/coresight/coresight-etm3x.c
+++ b/drivers/hwtracing/coresight/coresight-etm3x.c
@@ -422,9 +422,6 @@ static void etm_disable_hw(void *info)
 	CS_UNLOCK(drvdata->base);
 	etm_set_prog(drvdata);
 
-	/* Program trace enable to low by using always false event */
-	etm_writel(drvdata, ETM_HARD_WIRE_RES_A | ETM_EVENT_NOT_A, ETMTEEVR);
-
 	/* Read back sequencer and counters for post trace analysis */
 	config->seq_curr_state = (etm_readl(drvdata, ETMSQR) & ETM_SQR_MASK);
 
-- 
1.9.1

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Thread

[PATCH V3 00/26] Coresight integration with perf Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:20 +0100
  [PATCH V3 07/26] coresight: moving PM runtime operations to core framework Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 17/26] coresight: etb10: moving to local atomic operations Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 24/26] perf tools: adding perf_session to *info_prive_size() Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 05/26] coresight: etm3x: implementing 'cpu_id()' API Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 08/26] coresight: etm3x: adding operation mode for etm_enable() Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 23/26] perf tools: making function set_max_cpu_num() non static Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 20/26] coresight: etm-perf: new PMU driver for ETM tracers Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 06/26] coresight: associating path with session rather than tracer Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 11/26] coresight: etm3x: changing default trace configuration Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 25/26] perf tools: making coresight PMU listable Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 12/26] coresight: etm3x: consolidating initial config Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 19/26] coresight: etb10: implementing AUX space API Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 10/26] coresight: etm3x: set progbit to stop trace collection Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 03/26] coresight: etm3x: unlocking tracers in default arch init Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 14/26] coresight: etm3x: adding perf_get/set_config() API Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 09/26] coresight: add API to get sink from path Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 16/26] perf: changing pmu::setup_aux() parameter to include event Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 18/26] coresight: adding operation mode for sink->enable() Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 01/26] coresight: etm3x: moving etm_readl/writel to header file Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 26/26] perf tools: adding coresight etm PMU record capabilities Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 21/26] coresight: introducing a global trace ID function Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  [PATCH V3 22/26] coresight: updating documentation to reflect integration with perf Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-11 23:30 +0100
  Re: [PATCH V3 02/26] coresight: etm3x: moving sysFS entries to dedicated file Arnd Bergmann <arnd@arndb.de> - 2015-11-11 23:40 +0100
    Re: [PATCH V3 02/26] coresight: etm3x: moving sysFS entries to  dedicated file Mathieu Poirier <mathieu.poirier@linaro.org> - 2015-11-13 17:20 +0100
      Re: [PATCH V3 02/26] coresight: etm3x: moving sysFS entries to dedicated file Arnd Bergmann <arnd@arndb.de> - 2015-11-13 17:30 +0100
  Re: [PATCH V3 00/26] Coresight integration with perf Alexander Shishkin <alexander.shishkin@linux.intel.com> - 2015-11-12 12:00 +0100

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