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Merge tag 'perf-core-for-mingo-5.8-20200420' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

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Pull perf/core fixes and improvements from Arnaldo Carvalho de Melo:

kernel + tools/perf:

  Alexey Budankov:

  - Introduce CAP_PERFMON to kernel and user space.

callchains:

  Adrian Hunter:

  - Allow using Intel PT to synthesize callchains for regular events.

  Kan Liang:

  - Stitch LBR records from multiple samples to get deeper backtraces,
    there are caveats, see the csets for details.

perf script:

  Andreas Gerstmayr:

  - Add flamegraph.py script

BPF:

  Jiri Olsa:

  - Synthesize bpf_trampoline/dispatcher ksymbol events.

perf stat:

  Arnaldo Carvalho de Melo:

  - Honour --timeout for forked workloads.

  Stephane Eranian:

  - Force error in fallback on :k events, to avoid counting nothing when
    the user asks for kernel events but is not allowed to.

perf bench:

  Ian Rogers:

  - Add event synthesis benchmark.

tools api fs:

  Stephane Eranian:

 - Make xxx__mountpoint() more scalable

libtraceevent:

  He Zhe:

  - Handle return value of asprintf.

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar
2020-04-22 14:08:28 +02:00
parent 18bf34080c 12e89e65f4
commit 87cfeb1920
85 changed files with 1855 additions and 517 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
drivers/gpu/drm/i915/i915_perf.c
View File

@@ -3390,10 +3390,10 @@ i915_perf_open_ioctl_locked(struct i915_perf *perf,
/* Similar to perf's kernel.perf_paranoid_cpu sysctl option
* we check a dev.i915.perf_stream_paranoid sysctl option
* to determine if it's ok to access system wide OA counters
* without CAP_SYS_ADMIN privileges.
* without CAP_PERFMON or CAP_SYS_ADMIN privileges.
*/
if (privileged_op &&
i915_perf_stream_paranoid && !capable(CAP_SYS_ADMIN)) {
i915_perf_stream_paranoid && !perfmon_capable()) {
DRM_DEBUG("Insufficient privileges to open i915 perf stream\n");
ret = -EACCES;
goto err_ctx;
@@ -3586,9 +3586,8 @@ static int read_properties_unlocked(struct i915_perf *perf,
} else
oa_freq_hz = 0;
if (oa_freq_hz > i915_oa_max_sample_rate &&
!capable(CAP_SYS_ADMIN)) {
DRM_DEBUG("OA exponent would exceed the max sampling frequency (sysctl dev.i915.oa_max_sample_rate) %uHz without root privileges\n",
if (oa_freq_hz > i915_oa_max_sample_rate && !perfmon_capable()) {
DRM_DEBUG("OA exponent would exceed the max sampling frequency (sysctl dev.i915.oa_max_sample_rate) %uHz without CAP_PERFMON or CAP_SYS_ADMIN privileges\n",
i915_oa_max_sample_rate);
return -EACCES;
}
@@ -4009,7 +4008,7 @@ int i915_perf_add_config_ioctl(struct drm_device *dev, void *data,
return -EINVAL;
}
if (i915_perf_stream_paranoid && !capable(CAP_SYS_ADMIN)) {
if (i915_perf_stream_paranoid && !perfmon_capable()) {
DRM_DEBUG("Insufficient privileges to add i915 OA config\n");
return -EACCES;
}
@@ -4156,7 +4155,7 @@ int i915_perf_remove_config_ioctl(struct drm_device *dev, void *data,
return -ENOTSUPP;
}
if (i915_perf_stream_paranoid && !capable(CAP_SYS_ADMIN)) {
if (i915_perf_stream_paranoid && !perfmon_capable()) {
DRM_DEBUG("Insufficient privileges to remove i915 OA config\n");
return -EACCES;
}