From: Anshuman Khandual <anshuman.khandual@arm.com>
To: linux-arm-kernel@lists.infradead.org, coresight@lists.linaro.org
Cc: mike.leach@linaro.org,
Anshuman Khandual <anshuman.khandual@arm.com>,
linux-kernel@vger.kernel.org, mathieu.poirier@linaro.org,
suzuki.poulose@arm.com
Subject: [RFC 08/11] coresight: etm-perf: Truncate the perf record if handle has no space
Date: Tue, 10 Nov 2020 18:15:06 +0530 [thread overview]
Message-ID: <1605012309-24812-9-git-send-email-anshuman.khandual@arm.com> (raw)
In-Reply-To: <1605012309-24812-1-git-send-email-anshuman.khandual@arm.com>
While starting off the etm event, just abort and truncate the perf record
if the perf handle as no space left. This avoids configuring both source
and sink devices in case the data cannot be consumed in perf.
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
---
drivers/hwtracing/coresight/coresight-etm-perf.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-etm-perf.c b/drivers/hwtracing/coresight/coresight-etm-perf.c
index ea73cfa..534e205 100644
--- a/drivers/hwtracing/coresight/coresight-etm-perf.c
+++ b/drivers/hwtracing/coresight/coresight-etm-perf.c
@@ -347,6 +347,9 @@ static void etm_event_start(struct perf_event *event, int flags)
if (!event_data)
goto fail;
+ if (!handle->size)
+ goto fail_end_stop;
+
/*
* Check if this ETM is allowed to trace, as decided
* at etm_setup_aux(). This could be due to an unreachable
--
2.7.4
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next prev parent reply other threads:[~2020-11-10 12:47 UTC|newest]
Thread overview: 36+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-10 12:44 [RFC 00/11] arm64: coresight: Enable ETE and TRBE Anshuman Khandual
2020-11-10 12:44 ` [RFC 01/11] arm64: Add TRBE definitions Anshuman Khandual
2020-11-10 12:45 ` [RFC 02/11] coresight: etm-perf: Allow an event to use different sinks Anshuman Khandual
2020-11-12 9:21 ` Suzuki K Poulose
2020-11-12 10:37 ` Linu Cherian
2020-11-12 11:09 ` Suzuki K Poulose
2020-11-10 12:45 ` [RFC 03/11] coresight: Do not scan for graph if none is present Anshuman Khandual
2020-11-10 12:45 ` [RFC 04/11] coresight: etm4x: Add support for PE OS lock Anshuman Khandual
2020-11-10 12:45 ` [RFC 05/11] coresight: ete: Add support for sysreg support Anshuman Khandual
2020-11-10 12:45 ` [RFC 06/11] coresight: ete: Detect ETE as one of the supported ETMs Anshuman Khandual
2020-11-14 5:36 ` Tingwei Zhang
2020-11-23 9:56 ` Suzuki K Poulose
2020-11-10 12:45 ` [RFC 07/11] coresight: sink: Add TRBE driver Anshuman Khandual
2020-11-12 10:13 ` Suzuki K Poulose
2020-11-25 5:25 ` Anshuman Khandual
2020-11-14 5:38 ` Tingwei Zhang
2020-11-23 3:51 ` Anshuman Khandual
2020-11-10 12:45 ` Anshuman Khandual [this message]
2020-11-10 12:45 ` [RFC 09/11] coresight: etm-perf: Disable the path before capturing the trace data Anshuman Khandual
2020-11-12 9:27 ` Suzuki K Poulose
2020-11-23 6:08 ` Anshuman Khandual
2020-11-23 10:01 ` Suzuki K Poulose
2020-11-27 10:32 ` Suzuki K Poulose
2020-12-11 20:31 ` Mathieu Poirier
2020-12-14 10:00 ` Suzuki K Poulose
2020-11-10 12:45 ` [RFC 10/11] coresgith: etm-perf: Connect TRBE sink with ETE source Anshuman Khandual
2020-11-12 9:31 ` Suzuki K Poulose
2020-11-23 5:37 ` Anshuman Khandual
2020-12-11 21:31 ` Mathieu Poirier
2020-11-10 12:45 ` [RFC 11/11] dts: bindings: Document device tree binding for Arm TRBE Anshuman Khandual
2020-11-10 18:25 ` [RFC 00/11] arm64: coresight: Enable ETE and TRBE Mathieu Poirier
2020-11-14 5:17 ` Tingwei Zhang
2020-11-16 15:00 ` Mike Leach
2020-11-23 3:40 ` Anshuman Khandual
2020-11-23 12:30 ` Mike Leach
2020-11-23 2:43 ` Anshuman Khandual
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