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[184.64.168.246]) by smtp.gmail.com with ESMTPSA id xi7sm21737967pbc.56.2015.11.13.10.46.21 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Fri, 13 Nov 2015 10:46:22 -0800 (PST) From: Mathieu Poirier To: gregkh@linuxfoundation.org, a.p.zijlstra@chello.nl, alexander.shishkin@linux.intel.com, acme@kernel.org, mingo@redhat.com, corbet@lwn.net, nicolas.pitre@linaro.org Subject: [PATCH V4 05/26] coresight: etm3x: implementing 'cpu_id()' API Date: Fri, 13 Nov 2015 11:44:56 -0700 Message-Id: <1447440317-1977-6-git-send-email-mathieu.poirier@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1447440317-1977-1-git-send-email-mathieu.poirier@linaro.org> References: <1447440317-1977-1-git-send-email-mathieu.poirier@linaro.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151113_104644_447000_2BA87781 X-CRM114-Status: GOOD ( 14.46 ) X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: al.grant@arm.com, mathieu.poirier@linaro.org, pawel.moll@arm.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, fainelli@broadcom.com, adrian.hunter@intel.com, tor@ti.com, mike.leach@arm.com, zhang.chunyan@linaro.org, linux-arm-kernel@lists.infradead.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.4 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Other than plainly parsing the device tree there is no way to know which CPU a tracer is affined to. As such adding an interface to lookup the CPU field enclosed in the etm_drvdata structure that was initialised at boot time. Signed-off-by: Mathieu Poirier --- drivers/hwtracing/coresight/coresight-etm3x.c | 8 ++++++++ include/linux/coresight.h | 3 +++ 2 files changed, 11 insertions(+) diff --git a/drivers/hwtracing/coresight/coresight-etm3x.c b/drivers/hwtracing/coresight/coresight-etm3x.c index 67af548a874d..74526f044a06 100644 --- a/drivers/hwtracing/coresight/coresight-etm3x.c +++ b/drivers/hwtracing/coresight/coresight-etm3x.c @@ -312,6 +312,13 @@ static void etm_enable_hw(void *info) dev_dbg(drvdata->dev, "cpu: %d enable smp call done\n", drvdata->cpu); } +static int etm_cpu_id(struct coresight_device *csdev) +{ + struct etm_drvdata *drvdata = dev_get_drvdata(csdev->dev.parent); + + return drvdata->cpu; +} + int etm_get_trace_id(struct etm_drvdata *drvdata) { unsigned long flags; @@ -438,6 +445,7 @@ static void etm_disable(struct coresight_device *csdev) } static const struct coresight_ops_source etm_source_ops = { + .cpu_id = etm_cpu_id, .trace_id = etm_trace_id, .enable = etm_enable, .disable = etm_disable, diff --git a/include/linux/coresight.h b/include/linux/coresight.h index a7cabfa23b55..bf62b265bf52 100644 --- a/include/linux/coresight.h +++ b/include/linux/coresight.h @@ -205,12 +205,15 @@ struct coresight_ops_link { /** * struct coresight_ops_source - basic operations for a source * Operations available for sources. + * @cpu_id: returns the value of the CPU number this component + * is associated to. * @trace_id: returns the value of the component's trace ID as known to the HW. * @enable: enables tracing for a source. * @disable: disables tracing for a source. */ struct coresight_ops_source { + int (*cpu_id)(struct coresight_device *csdev); int (*trace_id)(struct coresight_device *csdev); int (*enable)(struct coresight_device *csdev); void (*disable)(struct coresight_device *csdev);