From: Mathieu Poirier <mathieu.poirier@linaro.org>
To: gregkh@linuxfoundation.org
Cc: saiprakash.ranjan@codeaurora.org, suzuki.poulose@arm.com,
vulab@iscas.ac.cn, tingwei@codeaurora.org,
andriy.shevchenko@linux.intel.com,
linux-arm-kernel@lists.infradead.org, mike.leach@linaro.org
Subject: [PATCH 10/17] coresight: etmv4: Counter values not saved on disable
Date: Thu, 16 Jul 2020 11:57:39 -0600 [thread overview]
Message-ID: <20200716175746.3338735-11-mathieu.poirier@linaro.org> (raw)
In-Reply-To: <20200716175746.3338735-1-mathieu.poirier@linaro.org>
From: Mike Leach <mike.leach@linaro.org>
The counter value registers change during operation, however this change
is not reflected in the values seen by the user in sysfs.
This fixes the issue by reading back the values on disable.
Signed-off-by: Mike Leach <mike.leach@linaro.org>
Fixes: 2e1cdfe184b52 ("coresight-etm4x: Adding CoreSight ETM4x driver")
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
---
drivers/hwtracing/coresight/coresight-etm4x.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.c b/drivers/hwtracing/coresight/coresight-etm4x.c
index 2290f41f0074..2d732af8b3e7 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x.c
@@ -511,6 +511,12 @@ static void etm4_disable_hw(void *info)
readl_relaxed(drvdata->base + TRCSSCSRn(i));
}
+ /* read back the current counter values */
+ for (i = 0; i < drvdata->nr_cntr; i++) {
+ config->cntr_val[i] =
+ readl_relaxed(drvdata->base + TRCCNTVRn(i));
+ }
+
coresight_disclaim_device_unlocked(drvdata->base);
CS_LOCK(drvdata->base);
--
2.25.1
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next prev parent reply other threads:[~2020-07-16 18:01 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-16 17:57 [PATCH 00/17] coresight: next v5.8-rc5 Mathieu Poirier
2020-07-16 17:57 ` [PATCH 01/17] coresight: replicator: Use CS_AMBA_ID macro for id table Mathieu Poirier
2020-07-16 17:57 ` [PATCH 02/17] coresight: catu: " Mathieu Poirier
2020-07-16 17:57 ` [PATCH 03/17] coresight: etm4x: Add support to skip trace unit power up Mathieu Poirier
2020-07-16 17:57 ` [PATCH 04/17] dt-bindings: arm: coresight: " Mathieu Poirier
2020-07-16 17:57 ` [PATCH 05/17] coresight: replicator: Reset replicator if context is lost Mathieu Poirier
2020-07-16 17:57 ` [PATCH 06/17] dt-bindings: arm: coresight: Add optional property to replicators Mathieu Poirier
2020-07-16 17:57 ` [PATCH 07/17] coresight: Use devm_kcalloc() in coresight_alloc_conns() Mathieu Poirier
2020-07-16 17:57 ` [PATCH 08/17] coresight: Drop double check for ACPI companion device Mathieu Poirier
2020-07-16 17:57 ` [PATCH 09/17] coresight: etmv4: Fix resource selector constant Mathieu Poirier
2020-07-16 17:57 ` Mathieu Poirier [this message]
2020-07-16 17:57 ` [PATCH 11/17] coresight: Fix comment in main header file Mathieu Poirier
2020-07-16 17:57 ` [PATCH 12/17] coresight: tmc: Add shutdown callback for TMC ETR Mathieu Poirier
2020-07-16 17:57 ` [PATCH 13/17] coresight: tmc: Fix TMC mode read in tmc_read_unprepare_etb() Mathieu Poirier
2020-07-16 17:57 ` [PATCH 14/17] coresight: Add default sink selection to CoreSight base Mathieu Poirier
2020-07-16 17:57 ` [PATCH 15/17] coresight: tmc: Update sink types for default selection Mathieu Poirier
2020-07-16 17:57 ` [PATCH 16/17] coresight: etm: perf: Add default sink selection to etm perf Mathieu Poirier
2020-07-16 17:57 ` [PATCH 17/17] coresight: etm4x: Fix save/restore during cpu idle Mathieu Poirier
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