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Moving all kernel side CoreSight framework and drivers to SPDX identifier.
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This is a cosmetic patch that deals with the address filter structure's
ambiguous fields 'filter' and 'range'. The former stands to mean that the
filter's *action* should be to filter the traces to its address range if
it's set or stop tracing if it's unset. This is confusing and hard on the
eyes, so this patch replaces it with 'action' enum. The 'range' field is
completely redundant (meaning that the filter is an address range as
opposed to a single address trigger), as we can use zero size to mean the
same thing.
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: Will Deacon <will.deacon@arm.com>
Link: http://lkml.kernel.org/r/20180329120648.11902-1-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Return stack is a programmable option on some ETM and PTM hardware.
Adds the option flags to enable this from the perf event command line.
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>
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attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work with const
attribute_group. So mark the non-const structs as const.
File size before:
text data bss dec hex filename
2573 288 296 3157 c55 coresight-etm-perf.o
File size After adding 'const':
text data bss dec hex filename
2613 224 296 3133 c3d coresight-etm-perf.o
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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With 4.11-rc4, the following command triggers a WARN_ON,
when a sink is not enabled.
perf record -e cs_etm/@20010000.etf/
[88286.547741] ------------[ cut here ]------------
[88286.552332] WARNING: CPU: 3 PID: 2156 at kernel/workqueue.c:1442 __queue_work+0x29c/0x3b8
[88286.560427] Modules linked in:
[88286.563451]
[88286.564928] CPU: 3 PID: 2156 Comm: perf_v4.11 Not tainted 4.11.0-rc4 #217
[88286.573453] Hardware name: ARM LTD ARM Juno Development Platform/ARM Juno Development Platform, BIOS EDK II Aug 15
2016
[88286.584128] task: ffff80097597c200 task.stack: ffff8009768b0000
[88286.589990] PC is at __queue_work+0x29c/0x3b8
[88286.594303] LR is at __queue_work+0x104/0x3b8
[88286.598614] pc : [<ffff0000080d8c7c>] lr : [<ffff0000080d8ae4>] pstate: a00001c5
[88286.605934] sp : ffff8009768b3aa0
[88286.609212] x29: ffff8009768b3aa0 x28: ffff80097ff3da00
[88286.614477] x27: ffff80097ff89c00 x26: ffff8009751b0e00
[88286.619741] x25: ffff000008c9f000 x24: 0000000000000003
[88286.625004] x23: 0000000000000040 x22: ffff000008d3dab8
[88286.630268] x21: ffff800977804400 x20: 0000000000000007
[88286.635532] x19: ffff000008c54000 x18: 0000fffff9185160
[88286.640795] x17: 0000ffffb33d9a38 x16: ffff000008088270
[88286.646059] x15: 0000ffffb345b590 x14: 0000000000000000
[88286.651322] x13: 0000000000000004 x12: 0000000000000040
[88286.656586] x11: 0000000000000068 x10: 0000000000000000
[88286.661849] x9 : ffff800977400028 x8 : 0000000000000000
[88286.667113] x7 : 0000000000000000 x6 : ffff0000080d8ae4
[88286.672376] x5 : 0000000000000000 x4 : 0000000000000080
[88286.677639] x3 : 0000000000000000 x2 : 0000000000000000
[88286.682903] x1 : 0000000000000000 x0 : ffff8009751b0e08
[88286.688166]
[88286.689638] ---[ end trace 31633f18fd33d4cb ]---
[88286.694206] Call trace:
[88286.696627] Exception stack(0xffff8009768b38d0 to 0xffff8009768b3a00)
[88286.703004] 38c0: ffff000008c54000 0001000000000000
[88286.710757] 38e0: ffff8009768b3aa0 ffff0000080d8c7c ffff8009768b3b50 ffff80097ff8a5b0
[88286.718511] 3900: 0000800977325000 0000000000000000 0000000000000040 ffff80097ffc6180
[88286.726264] 3920: ffff8009768b3940 ffff0000088a8694 ffff80097ffc5800 0000000000000000
[88286.734017] 3940: ffff8009768b3960 ffff0000081919c0 ffff80097ffc5280 0000000000000001
[88286.741771] 3960: ffff8009768b3a50 ffff00000819206c ffff8009751b0e08 0000000000000000
[88286.749523] 3980: 0000000000000000 0000000000000000 0000000000000080 0000000000000000
[88286.757277] 39a0: ffff0000080d8ae4 0000000000000000 0000000000000000 ffff800977400028
[88286.765029] 39c0: 0000000000000000 0000000000000068 0000000000000040 0000000000000004
[88286.772783] 39e0: 0000000000000000 0000ffffb345b590 ffff000008088270 0000ffffb33d9a38
[88286.780537] [<ffff0000080d8c7c>] __queue_work+0x29c/0x3b8
[88286.785883] [<ffff0000080d8df8>] queue_work_on+0x60/0x78
[88286.791146] [<ffff000008764c68>] etm_setup_aux+0x178/0x238
[88286.796578] [<ffff000008183600>] rb_alloc_aux+0x228/0x310
[88286.801925] [<ffff00000817e564>] perf_mmap+0x404/0x5a8
[88286.807015] [<ffff0000081c60cc>] mmap_region+0x394/0x5c0
[88286.812276] [<ffff0000081c654c>] do_mmap+0x254/0x388
[88286.817191] [<ffff0000081a989c>] vm_mmap_pgoff+0xbc/0xe0
[88286.822452] [<ffff0000081c3ffc>] SyS_mmap_pgoff+0xac/0x228
[88286.827884] [<ffff000008088288>] sys_mmap+0x18/0x28
[88286.832714] [<ffff000008082f30>] el0_svc_naked+0x24/0x28
The patch makes sure that the event_data->work is initialised
properly before we could possibly use it.
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Tested-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>
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In preparation for adding more flags to perf AUX records, introduce a
separate API for setting the flags for a session, rather than appending
more bool arguments to perf_aux_output_end. This allows to set each
flag at the time a corresponding condition is detected, instead of
tracking it in each driver's private state.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@infradead.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: vince@deater.net
Link: http://lkml.kernel.org/r/20170220133352.17995-3-alexander.shishkin@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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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>
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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>
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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>
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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>
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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>
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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>
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In commit 941943cf519f7cacbbcecee5c4ef4b77b466bd5c ("drivers/hwtracing:
make coresight-* explicitly non-modular") we removed all uses of
modular functions/macros in favour of their built-in equivlents in
this subsystem.
However that commit and commit 0bcbf2e30ff2271b54f54c8697a185f7d86ec6e4
("coresight: etm-perf: new PMU driver for ETM tracers") were in flight
at the same time, and hence one new non-modular user of module_init
crept back in. Fix it up like we did all the others.
Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Perf is a well known and used tool for performance monitoring
and much more. A such it is an ideal candidate for integration
with coresight based HW tracing.
This patch introduces a PMU that represent a coresight tracer to
the Perf core.
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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