user/sven/linux.git/include/linux/coresight.h, branch v5.4.76

coresight: Use platform agnostic names

2019-06-20T05:56:13Z

So far we have reused the name of the "platform" device for the CoreSight device. But this is not very intuitive when we move to ACPI. Also, the ACPI device names have ":" in them (e.g, ARMHC97C:01), which the perf tool doesn't like very much. This patch introduces a generic naming scheme, givin more intuitive names for the devices that appear on the CoreSight bus. The names follow the pattern "prefix" followed by "index" (e.g, etm5). We maintain a list of allocated devices per "prefix" to make sure we don't allocate a new name when it is reprobed (e.g, due to unsatisifed device dependencies). So, we maintain the list of "fwnodes" of the parent devices to allocate a consistent name. All devices except the ETMs get an index allocated in the order of probing. ETMs get an index based on the CPU they are attached to. TMC devices are named using "tmc_etf", "tmc_etb", and "tmc_etr" prefixes depending on the configuration of the device. The replicators and funnels are not classified as dynamic/static anymore. One could easily figure that out by checking the presence of "mgmt" registers under sysfs. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Use fwnode handle instead of device names

2019-06-20T05:56:13Z

We rely on the device names to find a CoreSight device on the coresight bus. The device name however is obtained from the platform, which is bound to the real platform/amba device. As we are about to use different naming scheme for the coresight devices, we can't rely on the platform device name to find the corresponding coresight device. Instead we use the platform agnostic "fwnode handle" of the parent device to find the devices. We also reuse the same fwnode as the parent for the Coresight device we create. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Reuse platform data structure for connection tracking

2019-06-20T05:56:12Z

The platform specific information describes the connections and the ports of a given coresigh device. This information is also recorded in the coresight device as separate fields. Let us reuse the original platform description to streamline the handling of the data. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Remove name from platform description

2019-06-20T05:56:12Z

We are about to use a name independent of the parent AMBA device name. As such, there is no need to have it in the platform description. Let us move this to coresight description instead. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Remove cpu field from platform data

2019-06-20T05:56:12Z

CPU field is only used by ETMs and there is a separate API for fetching the same. So, let us use that instead of using the common platform probing helper. Also, remove it from the platform_data. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Make device to CPU mapping generic

2019-06-20T05:56:11Z

The CoreSight components ETM and CPU-Debug are always associated with CPUs. Replace the of_coresight_get_cpu() with a platform agnostic helper, in preparation to add ACPI support. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Introduce generic platform data helper

2019-06-20T05:56:11Z

So far we have hard coded the DT platform parsing code in every driver. Introduce generic helper to parse the information provided by the firmware in a platform agnostic manner, in preparation for the ACPI support. Signed-off-by: Suzuki K Poulose Signed-off-by: Mathieu Poirier Signed-off-by: Greg Kroah-Hartman

coresight: Communicate perf event to sink buffer allocation functions

2019-04-25T20:00:17Z

Make struct perf_event available to sink buffer allocation functions in order to use the pid they carry to allocate and free buffer memory along with regimenting access to what source a sink can collect data for. Signed-off-by: Mathieu Poirier Tested-by: Leo Yan Tested-by: Robert Walker Signed-off-by: Greg Kroah-Hartman

coresight: Adding return code to sink::disable() operation

2019-04-25T20:00:16Z

In preparation to handle device reference counting inside of the sink drivers, add a return code to the sink::disable() operation so that proper action can be taken if a sink has not been disabled. Signed-off-by: Mathieu Poirier Reviewed-by: Suzuki K Poulose Tested-by: Leo Yan Tested-by: Robert Walker Signed-off-by: Greg Kroah-Hartman

coresight: perf: Add "sinks" group to PMU directory

2019-02-06T13:00:39Z

Add a "sinks" directory entry so that users can see all the sinks available in the system in a single place. Individual sink are added as they are registered with the coresight bus. Committer tests: Test built on a ubuntu 18.04 container with a cross build environment to arm64, the new field is there, need to find a machine with this feature to do further testing in the future. root@d15263e5734a:/git/perf# grep CORESIGHT /tmp/build/v5.0-rc2+/.config CONFIG_CORESIGHT=y CONFIG_CORESIGHT_LINKS_AND_SINKS=y CONFIG_CORESIGHT_LINK_AND_SINK_TMC=y CONFIG_CORESIGHT_CATU=y CONFIG_CORESIGHT_SINK_TPIU=y CONFIG_CORESIGHT_SINK_ETBV10=y CONFIG_CORESIGHT_SOURCE_ETM4X=y CONFIG_CORESIGHT_DYNAMIC_REPLICATOR=y CONFIG_CORESIGHT_STM=y CONFIG_CORESIGHT_CPU_DEBUG=m root@d15263e5734a:/git/perf# root@d15263e5734a:/git/perf# file /tmp/build/v5.0-rc2+/drivers/hwtracing/coresight/*.o .../coresight/coresight-catu.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-cpu-debug.mod.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-cpu-debug.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-dynamic-replicator.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-etb10.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-etm-perf.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-etm4x-sysfs.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-etm4x.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-funnel.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-replicator.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-stm.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-tmc-etf.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-tmc-etr.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-tmc.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight-tpiu.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/coresight.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped .../coresight/of_coresight.o: ELF 64-bit MSB relocatable, ARM aarch64, version 1 (SYSV), not stripped root@d15263e5734a:/git/perf# root@d15263e5734a:/git/perf# pahole -C coresight_device /tmp/build/v5.0-rc2+/drivers/hwtracing/coresight/coresight.o struct coresight_device { struct coresight_connection * conns; /* 0 8 */ int nr_inport; /* 8 4 */ int nr_outport; /* 12 4 */ enum coresight_dev_type type; /* 16 4 */ union coresight_dev_subtype subtype; /* 20 8 */ /* XXX 4 bytes hole, try to pack */ const struct coresight_ops * ops; /* 32 8 */ struct device dev; /* 40 1408 */ /* XXX last struct has 7 bytes of padding */ /* --- cacheline 22 boundary (1408 bytes) was 40 bytes ago --- */ atomic_t * refcnt; /* 1448 8 */ bool orphan; /* 1456 1 */ bool enable; /* 1457 1 */ bool activated; /* 1458 1 */ /* XXX 5 bytes hole, try to pack */ struct dev_ext_attribute * ea; /* 1464 8 */ /* size: 1472, cachelines: 23, members: 12 */ /* sum members: 1463, holes: 2, sum holes: 9 */ /* paddings: 1, sum paddings: 7 */ }; root@d15263e5734a:/git/perf# Signed-off-by: Mathieu Poirier Reviewed-by: Suzuki K Poulose Acked-by: Peter Zijlstra Cc: Adrian Hunter Cc: Alexander Shishkin Cc: Alexei Starovoitov Cc: Greg Kroah-Hartman Cc: H. Peter Anvin Cc: Heiko Carstens Cc: Jiri Olsa Cc: Mark Rutland Cc: Martin Schwidefsky Cc: Namhyung Kim Cc: Peter Zijlstra Cc: Thomas Gleixner Cc: Will Deacon Cc: linux-arm-kernel@lists.infradead.org Cc: linux-s390@vger.kernel.org Link: http://lkml.kernel.org/r/20190131184714.20388-3-mathieu.poirier@linaro.org Signed-off-by: Arnaldo Carvalho de Melo