From: Suzuki K Poulose <suzuki.poulose@arm.com> To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, coresight@lists.linaro.org, mathieu.poirier@linaro.org, leo.yan@linaro.org, mike.leach@linaro.org, anshuman.khandual@arm.com, Suzuki K Poulose <suzuki.poulose@arm.com> Subject: [PATCH v6 18/26] coresight: etm4x: Expose trcdevarch via sysfs Date: Thu, 7 Jan 2021 12:38:51 +0000 [thread overview] Message-ID: <20210107123859.674252-19-suzuki.poulose@arm.com> (raw) In-Reply-To: <20210107123859.674252-1-suzuki.poulose@arm.com> Expose the TRCDEVARCH register via the sysfs for component detection. Given that the TRCIDR1 may not completely identify the ETM component and instead need to use TRCDEVARCH, expose this via sysfs for tools to use it for identification. Cc: Mike Leach <mike.leach@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- Changes since v5: - Move the trcdevarch to mgmt/ instead of the trcidr (Mike L) - Add sysfs documentation for the new register (Mike L) --- .../ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 ++++++++ drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++ 2 files changed, 10 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 881f0cd99ce4..8e53a32f8150 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -371,6 +371,14 @@ Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (Read) Print the content of the Device ID Register (0xFC8). The value is taken directly from the HW. +What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevarch +Date: January 2021 +KernelVersion: 5.12 +Contact: Mathieu Poirier <mathieu.poirier@linaro.org> +Description: (Read) Print the content of the Device Architecture Register + (offset 0xFBC). The value is taken directly read + from the HW. + What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevtype Date: April 2015 KernelVersion: 4.01 diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index 009818675928..b590b042dca3 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -2357,6 +2357,7 @@ coresight_etm4x_cross_read(trclsr, TRCLSR); coresight_etm4x_cross_read(trcauthstatus, TRCAUTHSTATUS); coresight_etm4x_cross_read(trcdevid, TRCDEVID); coresight_etm4x_cross_read(trcdevtype, TRCDEVTYPE); +coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH); coresight_etm4x_cross_read(trcpidr0, TRCPIDR0); coresight_etm4x_cross_read(trcpidr1, TRCPIDR1); coresight_etm4x_cross_read(trcpidr2, TRCPIDR2); @@ -2375,6 +2376,7 @@ static struct attribute *coresight_etmv4_mgmt_attrs[] = { &dev_attr_trcauthstatus.attr, &dev_attr_trcdevid.attr, &dev_attr_trcdevtype.attr, + &dev_attr_trcdevarch.attr, &dev_attr_trcpidr0.attr, &dev_attr_trcpidr1.attr, &dev_attr_trcpidr2.attr, -- 2.24.1
WARNING: multiple messages have this Message-ID (diff)
From: Suzuki K Poulose <suzuki.poulose@arm.com> To: linux-arm-kernel@lists.infradead.org Cc: mathieu.poirier@linaro.org, anshuman.khandual@arm.com, coresight@lists.linaro.org, Suzuki K Poulose <suzuki.poulose@arm.com>, linux-kernel@vger.kernel.org, leo.yan@linaro.org, mike.leach@linaro.org Subject: [PATCH v6 18/26] coresight: etm4x: Expose trcdevarch via sysfs Date: Thu, 7 Jan 2021 12:38:51 +0000 [thread overview] Message-ID: <20210107123859.674252-19-suzuki.poulose@arm.com> (raw) In-Reply-To: <20210107123859.674252-1-suzuki.poulose@arm.com> Expose the TRCDEVARCH register via the sysfs for component detection. Given that the TRCIDR1 may not completely identify the ETM component and instead need to use TRCDEVARCH, expose this via sysfs for tools to use it for identification. Cc: Mike Leach <mike.leach@linaro.org> Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> --- Changes since v5: - Move the trcdevarch to mgmt/ instead of the trcidr (Mike L) - Add sysfs documentation for the new register (Mike L) --- .../ABI/testing/sysfs-bus-coresight-devices-etm4x | 8 ++++++++ drivers/hwtracing/coresight/coresight-etm4x-sysfs.c | 2 ++ 2 files changed, 10 insertions(+) diff --git a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x index 881f0cd99ce4..8e53a32f8150 100644 --- a/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x +++ b/Documentation/ABI/testing/sysfs-bus-coresight-devices-etm4x @@ -371,6 +371,14 @@ Contact: Mathieu Poirier <mathieu.poirier@linaro.org> Description: (Read) Print the content of the Device ID Register (0xFC8). The value is taken directly from the HW. +What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevarch +Date: January 2021 +KernelVersion: 5.12 +Contact: Mathieu Poirier <mathieu.poirier@linaro.org> +Description: (Read) Print the content of the Device Architecture Register + (offset 0xFBC). The value is taken directly read + from the HW. + What: /sys/bus/coresight/devices/etm<N>/mgmt/trcdevtype Date: April 2015 KernelVersion: 4.01 diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c index 009818675928..b590b042dca3 100644 --- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c +++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c @@ -2357,6 +2357,7 @@ coresight_etm4x_cross_read(trclsr, TRCLSR); coresight_etm4x_cross_read(trcauthstatus, TRCAUTHSTATUS); coresight_etm4x_cross_read(trcdevid, TRCDEVID); coresight_etm4x_cross_read(trcdevtype, TRCDEVTYPE); +coresight_etm4x_cross_read(trcdevarch, TRCDEVARCH); coresight_etm4x_cross_read(trcpidr0, TRCPIDR0); coresight_etm4x_cross_read(trcpidr1, TRCPIDR1); coresight_etm4x_cross_read(trcpidr2, TRCPIDR2); @@ -2375,6 +2376,7 @@ static struct attribute *coresight_etmv4_mgmt_attrs[] = { &dev_attr_trcauthstatus.attr, &dev_attr_trcdevid.attr, &dev_attr_trcdevtype.attr, + &dev_attr_trcdevarch.attr, &dev_attr_trcpidr0.attr, &dev_attr_trcpidr1.attr, &dev_attr_trcpidr2.attr, -- 2.24.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2021-01-07 12:41 UTC|newest] Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-07 12:38 [PATCH v6 00/26] coresight: etm4x: Support for system instructions Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 01/26] coresight: etm4x: Handle access to TRCSSPCICRn Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 02/26] coresight: etm4x: Skip accessing TRCPDCR in save/restore Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 03/26] coresight: Introduce device access abstraction Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 23:38 ` Mathieu Poirier 2021-01-07 23:38 ` Mathieu Poirier 2021-01-07 12:38 ` [PATCH v6 04/26] coresight: tpiu: Prepare for using coresight " Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 05/26] coresight: Convert coresight_timeout to use " Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 06/26] coresight: Convert claim/disclaim operations to use access wrappers Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 07/26] coresight: etm4x: Always read the registers on the host CPU Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 08/26] coresight: etm4x: Convert all register accesses Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 09/26] coresight: etm4x: Add commentary on the registers Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 10/26] coresight: etm4x: Add sysreg access helpers Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 11/26] coresight: etm4x: Define DEVARCH register fields Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 12/26] coresight: etm4x: Check for Software Lock Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-08 0:18 ` Mathieu Poirier 2021-01-08 0:18 ` Mathieu Poirier 2021-01-07 12:38 ` [PATCH v6 13/26] coresight: etm4x: Cleanup secure exception level masks Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 14/26] coresight: etm4x: Clean up " Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 15/26] coresight: etm4x: Handle ETM architecture version Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 16/26] coresight: etm4x: Detect access early on the target CPU Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 17/26] coresight: etm4x: Use TRCDEVARCH for component discovery Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose [this message] 2021-01-07 12:38 ` [PATCH v6 18/26] coresight: etm4x: Expose trcdevarch via sysfs Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 19/26] coresight: etm4x: Add necessary synchronization for sysreg access Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 20/26] coresight: etm4x: Detect system instructions support Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 21/26] coresight: etm4x: Refactor probing routine Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-08 0:38 ` Mathieu Poirier 2021-01-08 0:38 ` Mathieu Poirier 2021-01-07 12:38 ` [PATCH v6 22/26] coresight: etm4x: Run arch feature detection on the CPU Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-08 0:49 ` Mathieu Poirier 2021-01-08 0:49 ` Mathieu Poirier 2021-01-07 12:38 ` [PATCH v6 23/26] coresight: etm4x: Add support for sysreg only devices Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-08 0:55 ` Mathieu Poirier 2021-01-08 0:55 ` Mathieu Poirier 2021-01-07 12:38 ` [PATCH v6 24/26] dts: bindings: coresight: ETM system register access only units Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-07 12:38 ` [PATCH v6 25/26] arm64: Add TRFCR_ELx definitions Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-08 1:01 ` Mathieu Poirier 2021-01-08 1:01 ` Mathieu Poirier 2021-01-07 12:38 ` [PATCH v6 26/26] coresight: Add support for v8.4 SelfHosted tracing Suzuki K Poulose 2021-01-07 12:38 ` Suzuki K Poulose 2021-01-08 1:02 ` Mathieu Poirier 2021-01-08 1:02 ` Mathieu Poirier 2021-01-08 1:09 ` [PATCH v6 00/26] coresight: etm4x: Support for system instructions Mathieu Poirier 2021-01-08 1:09 ` Mathieu Poirier 2021-01-08 9:08 ` Suzuki K Poulose 2021-01-08 9:08 ` Suzuki K Poulose 2021-01-08 14:15 ` Suzuki K Poulose 2021-01-08 14:15 ` Suzuki K Poulose
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