summaryrefslogtreecommitdiffstats
path: root/drivers/hwtracing
Commit message (Collapse)AuthorAgeFilesLines
* mm, fs: reduce fault, page_mkwrite, and pfn_mkwrite to take only vmfDave Jiang2017-02-251-3/+3
| | | | | | | | | | | | | | | | | | | | | | | ->fault(), ->page_mkwrite(), and ->pfn_mkwrite() calls do not need to take a vma and vmf parameter when the vma already resides in vmf. Remove the vma parameter to simplify things. [arnd@arndb.de: fix ARM build] Link: http://lkml.kernel.org/r/20170125223558.1451224-1-arnd@arndb.de Link: http://lkml.kernel.org/r/148521301778.19116.10840599906674778980.stgit@djiang5-desk3.ch.intel.com Signed-off-by: Dave Jiang <dave.jiang@intel.com> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Cc: Theodore Ts'o <tytso@mit.edu> Cc: Darrick J. Wong <darrick.wong@oracle.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Jan Kara <jack@suse.com> Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* coresight: etm4x: Fix timestamp configuration when working from perfMathieu Poirier2017-01-251-1/+2
| | | | | | | | | | | | | | | | | When using the ETM4x tracers from the perf interface two trace options are available: cycle accurate and timestamp. Enabling the timestamp feature is done by setting TRCCONFIGR.TS (bit 11). The position of the timestamp bit in that register coincidentally happens to be the same as what was chosen to enable timestamping from the 'mode' sysFS entry. The code does the right thing but the semantic is wrong. This patch sets TRCCONFIGR.TS explicitly, as it is done from the sysFS interface. That way timestamps are set the same way from both perf and sysFS and there is no misunderstanding as to what is intended. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: Fix enabling of cycle accurate tracing in perf.Mike Leach2017-01-252-2/+6
| | | | | | | | | | | | Using perf record 'cyclacc' option in cs_etm event was not setting up cycle accurate trace correctly. Corrects bit set in TRCCONFIGR to enable cycle accurate trace. Programs TRCCCCTLR with a valid threshold value as required by ETMv4 spec. Signed-off-by: Mike Leach <mike.leach@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: fix kernel panic caused by invalid CPUWang Nan2017-01-251-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit d52c9750f150 ("coresight: reset "enable_sink" flag when need be") caused a kernel panic because of the using of an invalid value: after 'for_each_cpu(cpu, mask)', value of local variable 'cpu' become invalid, causes following 'cpu_to_node' access invalid memory area. This patch brings the deleted 'cpu = cpumask_first(mask)' back. Panic log: $ perf record -e cs_etm// ls Unable to handle kernel paging request at virtual address fffe801804af4f10 pgd = ffff8017ce031600 [fffe801804af4f10] *pgd=0000000000000000, *pud=0000000000000000 Internal error: Oops: 96000004 [#1] SMP Modules linked in: CPU: 33 PID: 1619 Comm: perf Not tainted 4.7.1+ #16 Hardware name: Huawei Taishan 2280 /CH05TEVBA, BIOS 1.10 11/24/2016 task: ffff8017cb0c8400 ti: ffff8017cb154000 task.ti: ffff8017cb154000 PC is at tmc_alloc_etf_buffer+0x60/0xd4 LR is at tmc_alloc_etf_buffer+0x44/0xd4 pc : [<ffff000008633df8>] lr : [<ffff000008633ddc>] pstate: 60000145 sp : ffff8017cb157b40 x29: ffff8017cb157b40 x28: 0000000000000000 ...skip... 7a60: ffff000008c64dc8 0000000000000006 0000000000000253 ffffffffffffffff 7a80: 0000000000000000 0000000000000000 ffff0000080872cc 0000000000000001 [<ffff000008633df8>] tmc_alloc_etf_buffer+0x60/0xd4 [<ffff000008632b9c>] etm_setup_aux+0x1dc/0x1e8 [<ffff00000816eed4>] rb_alloc_aux+0x2b0/0x338 [<ffff00000816a5e4>] perf_mmap+0x414/0x568 [<ffff0000081ab694>] mmap_region+0x324/0x544 [<ffff0000081abbe8>] do_mmap+0x334/0x3e0 [<ffff000008191150>] vm_mmap_pgoff+0xa4/0xc8 [<ffff0000081a9a30>] SyS_mmap_pgoff+0xb0/0x22c [<ffff0000080872e4>] sys_mmap+0x18/0x28 [<ffff0000080843f0>] el0_svc_naked+0x24/0x28 Code: 912040a5 d0001c00 f873d821 911c6000 (b8656822) ---[ end trace 98933da8f92b0c9a ]--- Signed-off-by: Wang Nan <wangnan0@huawei.com> Cc: Xia Kaixu <xiakaixu@huawei.com> Cc: Li Zefan <lizefan@huawei.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Fixes: d52c9750f150 ("coresight: reset "enable_sink" flag when need be") Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: stable <stable@vger.kernel.org> # 4.10 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: STM: Balance enable/disableSuzuki K Poulose2017-01-191-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The stm is automatically enabled when an application sets the policy via ->link() call back by using coresight_enable(), which keeps the refcount of the current users of the STM. However, the unlink() callback issues stm_disable() directly, which leaves the STM turned off, without the coresight layer knowing about it. This prevents any further uses of the STM hardware as the coresight layer still thinks the STM is turned on and doesn't enable the hardware when required. Even manually enabling the STM via sysfs can't really enable the hw. e.g, $ echo 1 > $CS_DEVS/$ETR/enable_sink $ mkdir -p $CONFIG_FS/stp-policy/$source.0/stm_test/ $ echo 32768 65535 > $CONFIG_FS/stp-policy/$source.0/stm_test/channels $ echo 64 > $CS_DEVS/$source/traceid $ ./stm_app Sending 64000 byte blocks of pattern 0 at 0us intervals Success to map channel(32768~32783) to 0xffffa95fa000 Sending on channel 32768 $ dd if=/dev/$ETR of=~/trace.bin.1 597+1 records in 597+1 records out 305920 bytes (306 kB) copied, 0.399952 s, 765 kB/s $ ./stm_app Sending 64000 byte blocks of pattern 0 at 0us intervals Success to map channel(32768~32783) to 0xffff7e9e2000 Sending on channel 32768 $ dd if=/dev/$ETR of=~/trace.bin.2 0+0 records in 0+0 records out 0 bytes (0 B) copied, 0.0232083 s, 0.0 kB/s Note that we don't get any data from the ETR for the second session. Also dmesg shows : [ 77.520458] coresight-tmc 20800000.etr: TMC-ETR enabled [ 77.537097] coresight-replicator etr_replicator@20890000: REPLICATOR enabled [ 77.558828] coresight-replicator main_replicator@208a0000: REPLICATOR enabled [ 77.581068] coresight-funnel 208c0000.main_funnel: FUNNEL inport 0 enabled [ 77.602217] coresight-tmc 20840000.etf: TMC-ETF enabled [ 77.618422] coresight-stm 20860000.stm: STM tracing enabled [ 139.554252] coresight-stm 20860000.stm: STM tracing disabled # End of first tracing session [ 146.351135] coresight-tmc 20800000.etr: TMC read start [ 146.514486] coresight-tmc 20800000.etr: TMC read end # Note that the STM is not turned on via stm_generic_link()->coresight_enable() # and hence none of the components are turned on. [ 152.479080] coresight-tmc 20800000.etr: TMC read start [ 152.542632] coresight-tmc 20800000.etr: TMC read end This patch fixes the problem by balancing the unlink operation by using the coresight_disable(), keeping the coresight layer in sync with the hardware state and thus allowing normal usage of the STM component. Fixes: commit 237483aa5cf43 ("coresight: stm: adding driver for CoreSight STM component") Cc: Pratik Patel <pratikp@codeaurora.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: stable@vger.kernel.org # 4.7+ Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Chunyan Zhang <zhang.chunyan@linaro.org> Reported-by: Robert Walker <robert.walker@arm.com> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight/etm3/4x: Consolidate hotplug state spaceThomas Gleixner2016-12-251-2/+2
| | | | | | | | | | | | | | | Even if both drivers are compiled in only one instance can run on a given system depending on the available tracer cell. So having seperate hotplug states for them is pointless. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Link: http://lkml.kernel.org/r/20161221192112.162765484@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* cpu/hotplug: Cleanup state namesThomas Gleixner2016-12-252-4/+4
| | | | | | | | | | | | | | | | | When the state names got added a script was used to add the extra argument to the calls. The script basically converted the state constant to a string, but the cleanup to convert these strings into meaningful ones did not happen. Replace all the useless strings with 'subsys/xxx/yyy:state' strings which are used in all the other places already. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Sebastian Siewior <bigeasy@linutronix.de> Link: http://lkml.kernel.org/r/20161221192112.085444152@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* Merge tag 'trace-v4.10' of ↵Linus Torvalds2016-12-157-9/+113
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace Pull tracing updates from Steven Rostedt: "This release has a few updates: - STM can hook into the function tracer - Function filtering now supports more advance glob matching - Ftrace selftests updates and added tests - Softirq tag in traces now show only softirqs - ARM nop added to non traced locations at compile time - New trace_marker_raw file that allows for binary input - Optimizations to the ring buffer - Removal of kmap in trace_marker - Wakeup and irqsoff tracers now adhere to the set_graph_notrace file - Other various fixes and clean ups" * tag 'trace-v4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace: (42 commits) selftests: ftrace: Shift down default message verbosity kprobes/trace: Fix kprobe selftest for newer gcc tracing/kprobes: Add a helper method to return number of probe hits tracing/rb: Init the CPU mask on allocation tracing: Use SOFTIRQ_OFFSET for softirq dectection for more accurate results tracing/fgraph: Have wakeup and irqsoff tracers ignore graph functions too fgraph: Handle a case where a tracer ignores set_graph_notrace tracing: Replace kmap with copy_from_user() in trace_marker writing ftrace/x86_32: Set ftrace_stub to weak to prevent gcc from using short jumps to it tracing: Allow benchmark to be enabled at early_initcall() tracing: Have system enable return error if one of the events fail tracing: Do not start benchmark on boot up tracing: Have the reg function allow to fail ring-buffer: Force rb_end_commit() and rb_set_commit_to_write() inline ring-buffer: Froce rb_update_write_stamp() to be inlined ring-buffer: Force inline of hotpath helper functions tracing: Make __buffer_unlock_commit() always_inline tracing: Make tracepoint_printk a static_key ring-buffer: Always inline rb_event_data() ring-buffer: Make rb_reserve_next_event() always inlined ...
| * stm: Mark the functions of writing STM with notraceChunyan Zhang2016-11-221-3/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | If CONFIG_STM_SOURCE_FTRACE is selected, Function trace data can be writen to sink via STM, all functions that related to writing data packets to STM should be marked 'notrace' to avoid being traced by Ftrace, otherwise the program would stall into an endless loop. Link: http://lkml.kernel.org/r/1479715043-6534-7-git-send-email-zhang.chunyan@linaro.org Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * stm dummy: Mark dummy_stm_packet() with notraceChunyan Zhang2016-11-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | If CONFIG_STM_SOURCE_FTRACE is selected, Function trace data can be writen to sink via STM, all functions that related to writing data packets to STM should be marked 'notrace' to avoid being traced by Ftrace, otherwise the program would stall into an endless loop. Link: http://lkml.kernel.org/r/1479715043-6534-6-git-send-email-zhang.chunyan@linaro.org Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * intel_th: Mark sth_stm_packet() with notraceChunyan Zhang2016-11-221-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | If CONFIG_STM_SOURCE_FTRACE is selected, Function trace data can be writen to sink via STM, all functions that related to writing data packets to STM should be marked 'notrace' to avoid being traced by Ftrace, otherwise the program would stall into an endless loop. Link: http://lkml.kernel.org/r/1479715043-6534-5-git-send-email-zhang.chunyan@linaro.org Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * coresight: Mark stm_generic_packet() with notraceChunyan Zhang2016-11-221-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | If CONFIG_STM_SOURCE_FTRACE is selected, Function trace data can be writen to sink via STM, all functions that related to writing data packets to STM should be marked 'notrace' to avoid being traced by Ftrace, otherwise the program would stall into an endless loop. Link: http://lkml.kernel.org/r/1479715043-6534-4-git-send-email-zhang.chunyan@linaro.org Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
| * stm class: ftrace: Add ftrace-export-over-stm driverChunyan Zhang2016-11-223-0/+100
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a driver that models itself as an stm_source called stm_ftrace. Once the stm device and stm_ftrace have been linked via sysfs, the driver registers itself as a trace_export and everything passed to the interface from Ftrace subsystem will end up in the STM trace engine. Link: http://lkml.kernel.org/r/1479715043-6534-3-git-send-email-zhang.chunyan@linaro.org Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Acked-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
* | coresight: perf: Add a missing call to etm_free_auxQuentin Lambert2016-11-291-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Most error branches following the call to alloc_event_data contain a call to etm_free_aux. This patch add a call to etm_free_aux to an error branch that does not call it. This issue was found with Hector. Signed-off-by: Quentin Lambert <lambert.quentin@gmail.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: Add support for ARM Coresight STM-500Suzuki K Poulose2016-11-291-0/+5
| | | | | | | | | | | | | | | | | | | | Add the PIDs for STM-500 to the known STM devices list. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: tmc: Remove duplicate memsetSuzuki K. Poulose2016-11-291-2/+0Star
| | | | | | | | | | | | | | | | | | | | | | The tmc_etr_enable_hw() fills the buffer with 0's before enabling the hardware. So, we don't need an explicit memset() in tmc_enable_etr_sink_sysfs() before calling the tmc_etr_enable_hw(). This patch removes the explicit memset from tmc_enable_etr_sink_sysfs. Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: tmc: Get rid of mode parameter for helper routinesSuzuki K. Poulose2016-11-292-24/+9Star
| | | | | | | | | | | | | | | | | | | | | | Get rid of the superfluous mode parameter and the check for the mode in tmc_etX_enable_sink_{perf/sysfs}. While at it, also remove the unnecessary WARN_ON() checks. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: tmc: Cleanup operation mode handlingSuzuki K. Poulose2016-11-293-34/+26Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The mode of operation of the TMC tracked in drvdata->mode is defined as a local_t type. This is always checked and modified under the drvdata->spinlock and hence we don't need local_t for it and the unnecessary synchronisation instructions that comes with it. This change makes the code a bit more cleaner. Also fixes the order in which we update the drvdata->mode to CS_MODE_DISABLED. i.e, in tmc_disable_etX_sink we change the mode to CS_MODE_DISABLED before invoking tmc_disable_etX_hw() which in turn depends on the mode to decide whether to dump the trace to a buffer. Applies on mathieu's coresight/next tree [1] https://git.linaro.org/kernel/coresight.git next Reported-by: Venkatesh Vivekanandan <venkatesh.vivekanandan@broadcom.com> Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: reset "enable_sink" flag when need beMathieu Poirier2016-11-293-22/+87
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using coresight from the perf interface sinks are specified as part of the perf command line. As such the sink needs to be disabled once it has been acknowledged by the coresight framework. Otherwise the sink stays enabled, which may interfere with other sessions. This patch removes the sink selection check from the build path process and make it a function on it's own. The function is then used when operating from sysFS or perf to determine what sink has been selected. If operated from perf the status of the "enable_sink" flag is reset so that concurrent session can use a different sink. When used from sysFS the status of the flag is left untouched since users have full control. The implementation doesn't handle a scenario where a sink has been enabled from sysFS and another sink is selected from the perf command line as both modes of operation are mutually exclusive. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: etm3x: Adding missing features of Coresight PTM componentsMuhammad Abdul WAHAB2016-11-292-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the current driver for Coresight components, two features of PTM components are missing: 1. Branch Broadcasting (present also in ETM but called Branch Output) 2. Return Stack (only present in PTM v1.0 and PTMv1.1) These features can be added simply to the code using `mode` field of `etm_config` struct. 1. **Branch Broadcast** : The branch broadcast feature is present in ETM components as well and is called Branch output. It allows to retrieve addresses for direct branch addresses alongside the indirect branch addresses. For example, it could be useful in cases when tracing without source code. 2. **Return Stack** : The return stack option allows to retrieve the return addresses of function calls. It can be useful to avoid CRA (Code Reuse Attacks) by keeping a shadowstack. Signed-off-by: Muhammad Abdul Wahab <muhammadabdul.wahab@centralesupelec.fr> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: etm3x: indentation fix (extra space removed)Muhammad Abdul WAHAB2016-11-291-1/+1
| | | | | | | | | | | | | | | | An extra space is removed. Signed-off-by: Muhammad Abdul Wahab <muhammadabdul.wahab@centralesupelec.fr> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | coresight: stm: return error code instead of zero in .packet()Chunyan Zhang2016-11-291-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In STM framework driver, the trace data writing loop would keep running until it received a negative return value or the whole trace packet has been written to STM device. So if the .packet() of STM device always returns zero since the device is not enabled or the parameter isn't supported, STM framework driver will stall into a dead loop. Returning -EACCES (Permission denied) in .packet() if the device is disabled makes more sense, and this is the same for returning -EINVAL if the channel passed into is not supported. Signed-off-by: Chunyan Zhang <zhang.chunyan@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* | intel_th: gth: Handle host mode correctlyAlexander Shishkin2016-11-181-2/+24
| | | | | | | | | | | | | | | | | | | | | | | | | | When detecting host debugger mode either though a module option or via the scratchpad register, do not export any configuration or capture related attributes to userspace and refuse attempts by the output drivers to configure output ports. This way, GTH can still act as a hub and ensure that the other components that rely on its presence continue to function properly, namely the source devices. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
* | intel_th: Support Host Debugger mode of operationAlexander Shishkin2016-11-182-8/+22
| | | | | | | | | | | | | | | | | | | | | | | | This patch adds a 'host_mode' module option to enable host-driven operational mode in the driver. In this mode, the driver does not perform trace configuration or enable trace capture, but still provides all the means necessary for software trace sources to write their data to the Trace Hub. This means that the debug host takes care of all the configuration and enabling and we do not interfere. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
* | intel_th: Constify subdevicesAlexander Shishkin2016-11-181-1/+1
| | | | | | | | | | | | The subdevice array consists of immutable objects, make them const. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
* | stm class: Fix device leak in open error pathJohan Hovold2016-11-181-3/+5
|/ | | | | | | | | | Make sure to drop the reference taken by class_find_device() also on allocation errors in open(). Signed-off-by: Johan Hovold <johan@kernel.org> Fixes: 7bd1d4093c2f ("stm class: Introduce an abstraction for...") Cc: stable@vger.kernel.org # v4.6+ Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
* coresight: tmc: mark symbols static where possibleBaoyou Xie2016-09-093-4/+4
| | | | | | | | | | | | | | | | We get a few warnings when building kernel with W=1: drivers/hwtracing/coresight/coresight-tmc-etr.c:23:6: warning: no previous prototype for 'tmc_etr_enable_hw' [-Wmissing-prototypes] drivers/hwtracing/coresight/coresight-tmc-etf.c:25:6: warning: no previous prototype for 'tmc_etb_enable_hw' [-Wmissing-prototypes] drivers/hwtracing/coresight/coresight-tmc.c:250:9: warning: no previous prototype for ‘trigger_cntr_show’ [-Wmissing-prototypes] ... In fact, these functions are only used in the file in which they are declared and don't need a declaration, but can be made static. so this patch marks these functions with 'static'. Signed-off-by: Baoyou Xie <baoyou.xie@linaro.org> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: perf: deal with error condition properlyMathieu Poirier2016-09-092-3/+3
| | | | | | | | | Function coresight_build_path() should return -ENOMEM when kzalloc fails to allocated the requested memory. That way callers can deal with the error condition in a similar way. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: adding configurable start/stop filteringMathieu Poirier2016-08-311-0/+71
| | | | | | | | | | With this patch we add start/stop filtering as specified on the perf cmd line. When the IP matches the start address trace generation gets triggered. The stop condition is achieved when the IP matches the stop address. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: adding configurable address range filteringMathieu Poirier2016-08-311-9/+119
| | | | | | | | | This patch adds the capability to specify address ranges from the perf cmd line using the --filter option. If the IP falls within the range(s) program flow traces are generated. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: configuring include/exclude functionMathieu Poirier2016-08-311-10/+25
| | | | | | | | | The include/exclude function of a tracer is applicable to address range and start/stop filters. To avoid duplication and reuse code moving the include/exclude configuration to a function of its own. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: adding range filter configuration functionMathieu Poirier2016-08-311-18/+38
| | | | | | | | Introducing a new function to do address range configuration generic enough to work for any address range and any comparator. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: cleaning up default filter configurationMathieu Poirier2016-08-311-26/+27
| | | | | | | | | | | The default filter configuration was hard to read and included some redundancy. This patch attempts to stream line configuration and improve readability. No change of functionality is included. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: split default and filter configurationMathieu Poirier2016-08-311-14/+22
| | | | | | | | | | | | | | Splitting the steps involved in the configuration of a tracer. The first part is generic and can be reused for both sysFS and Perf methods. The second part pertains to the configuration of filters themselves where the source of the information used to configure the filters will vary depending on the access methods. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm-perf: configuring filters from perf coreMathieu Poirier2016-08-312-15/+168
| | | | | | | | This patch implements the required API needed to access and retrieve range and start/stop filters from the perf core. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: remove duplicated enumerationMathieu Poirier2016-08-315-16/+10Star
| | | | | | | | | | | Both ETMv3 and ETMv4 drivers are declaring an 'enum etm_addr_type', creating reduncancy. This patch removes the enumeration from the driver files and adds it to a common header. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm-perf: pass struct perf_event to source::enable/disable()Mathieu Poirier2016-08-315-20/+26
| | | | | | | | | | | | With this commit [1] address range filter information is now found in the struct hw_perf_event::addr_filters. As such pass the event itself to the coresight_source::enable/disable() functions so that both event attribute and filter can be accessible for configuration. [1] 'commit 375637bc5249 ("perf/core: Introduce address range filtering")' Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: fix handling of ETM trace register access via sysfsSudeep Holla2016-08-316-22/+57
| | | | | | | | | | | | | | | | | | The ETM registers are classified into 2 categories: trace and management. The core power domain contains most of the trace unit logic including all(except TRCOSLAR and TRCOSLSR) the trace registers. The debug power domain contains the external debugger interface including all management registers. This patch adds coresight unit specific function coresight_simple_func which can be used for ETM trace registers by providing a ETM specific read function which does smp cross call to ensure the trace core is powered up before the register is accessed. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: request to retain power to the trace unit when activeSudeep Holla2016-08-312-0/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The Coresight ETMv4 architecture provides a way to request to keep the power to the trace unit. This might help to collect the traces without the need to disable the CPU power management(entering/exiting deeper idle states). Trace PowerDown Control Register provides powerup request bit which when set requests the system to retain power to the trace unit and emulate the powerdown request. Typically, a trace unit drives a signal to the power controller to request that the trace unit core power domain is powered up. However, if the trace unit and the CPU are in the same power domain then the implementation might combine the trace unit power up status with a signal from the CPU. This patch requests to retain power to the trace unit when active and to remove when inactive. Note this change will only request but the behaviour depends on the implementation. However, it matches the exact behaviour expected when the external debugger is connected with respect to CPU power states. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: tmc: Delete an unnecessary check before the function call "kfree"Markus Elfring2016-08-311-1/+1
| | | | | | | | | | | The kfree() function tests whether its argument is NULL and then returns immediately. Thus the test around the call is not needed. This issue was detected by using the Coccinelle software. Signed-off-by: Markus Elfring <elfring@users.sourceforge.net> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etm4x: remove duplicated include from coresight-etm4x.cWei Yongjun2016-08-311-1/+0Star
| | | | | | | | Remove duplicated include. Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: Use local coresight_desc instancesSuzuki K Poulose2016-08-319-114/+75Star
| | | | | | | | | | | | | | | Each coresight device prepares a description for coresight_register() in struct coresight_desc. Once we register the device, the description is useless and can be freed. The coresight_desc is small enough (48bytes on 64bit)i to be allocated on the stack. Hence use an automatic variable to avoid a needless dynamic allocation and wasting the memory(which will only be free'd when the device is destroyed). Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Pratik Patel <pratikp@codeaurora.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* hwtracing: coresight: of_coresight: add missing of_node_put after calling ↵Peter Chen2016-08-311-0/+1
| | | | | | | | | | | | | of_parse_phandle of_node_put needs to be called when the device node which is got from of_parse_phandle has finished using. Cc: linux-arm-kernel@lists.infradead.org Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Peter Chen <peter.chen@nxp.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight-etm3x: Add ARM ETM 3.5 Cortex-A5 peripheral IDOlivier Schonken2016-08-311-0/+5
| | | | | | Signed-off-by: Olivier Schonken <olivier.schonken@gmail.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: add PM runtime calls to coresight_simple_func()Mathieu Poirier2016-08-311-2/+6
| | | | | | | | | | It is mandatory to enable a coresight block's power domain before trying to access management registers. Otherwise the transaction simply stalls, leading to a system hang. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Reviewed-by: Sudeep Holla <sudeep.holla@arm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: delay initialisation when children are missingMathieu Poirier2016-08-311-1/+1
| | | | | | | | | | | | | | | Depending on when CoreSight device are discovered it is possible that some IP block may be referencing devices that have not been added to the bus yet. The end result is missing nodes in the CoreSight topology even when the devices are present and properly initialised. This patch solves the problem by asking the driver core to try initialising the device at a later time when the children of a CoreSight node are missing. Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: Add better messages for coresight_timeoutSuzuki K Poulose2016-08-313-12/+6Star
| | | | | | | | | | | | | | When we encounter a timeout waiting for a status change via coresight_timeout, the caller always print the offset which was tried. This is pretty much useless as it doesn't specify the bit position we wait for. Also, one needs to lookup the TRM to figure out, what was wrong. This patch changes all such error messages to print something more meaningful. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: Cleanup TMC status checkSuzuki K Poulose2016-08-311-1/+1
| | | | | | | | | | Use the defined symbol rather than hardcoding the value to check whether the TMC buffer is full. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: etmv4: Fix ETMv4x peripheral ID tableSuzuki K Poulose2016-08-311-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | This patch cleans up the peripheral id table for different ETMv4 implementations. As per Cortex-A53 TRM, the ETM has following id values: Peripheral ID0 0x5D 0xFE0 Peripheral ID1 0xB9 0xFE4 Peripheral ID2 0x4B 0xFE8 Peripheral ID3 0x00 0xFEC where, PID2: has the following format: [7:4] Revision [3] JEDEC 0b1 res1. Indicates a JEP106 identity code is used [2:0] DES_1 0b011 ARM Limited. This is bits[6:4] of JEP106 ID code The existing table entry checks only the bits [1:0], which is not sufficient enough. Fix it to match bits [3:0], just like the other entries do. While at it, correct the comment for A57 and the A53 entry. Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* coresight: tmc: Limit the trace to available dataSuzuki K Poulose2016-08-314-7/+17
| | | | | | | | | | | | At present the ETF or ETR gives out the entire device buffer, even if there is less or even no trace data available. This patch limits the trace data given out to the actual trace data collected. Cc: mathieu.poirier@linaro.org Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com> Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-11-14 03:57:48 +0100