AuxXxilium/linux_dsm_epyc7002
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f797f05d91
linux_dsm_epyc7002/arch/x86/events
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Alexander Antonov f797f05d91 perf/x86/intel/uncore: Fix for iio mapping on Skylake Server 
Introduced early attributes /sys/devices/uncore_iio_<pmu_idx>/die* are
initialized by skx_iio_set_mapping(), however, for example, for multiple
segment platforms skx_iio_get_topology() returns -EPERM before a list of
attributes in skx_iio_mapping_group will have been initialized.
As a result the list is being NULL. Thus the warning
"sysfs: (bin_)attrs not set by subsystem for group: uncore_iio_*/" appears
and uncore_iio pmus are not available in sysfs. Clear IIO attr_update
to properly handle the cases when topology information cannot be
retrieved.

Fixes: bb42b3d397 ("perf/x86/intel/uncore: Expose an Uncore unit to IIO PMON mapping")
Reported-by: Kyle Meyer <kyle.meyer@hpe.com>
Suggested-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Alexander Antonov <alexander.antonov@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Alexei Budankov <alexey.budankov@linux.intel.com>
Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Link: https://lkml.kernel.org/r/20200928102133.61041-1-alexander.antonov@linux.intel.com
2020-09-29 09:57:02 +02:00
..
amd perf/amd/uncore: Inform the user how many counters each uncore PMU has 2020-09-24 15:55:50 +02:00
intel perf/x86/intel/uncore: Fix for iio mapping on Skylake Server 2020-09-29 09:57:02 +02:00
zhaoxin x86/perf: Fix a typo 2020-07-22 10:22:08 +02:00
core.c perf/x86/amd: Fix sampling Large Increment per Cycle events 2020-09-10 11:19:35 +02:00
Kconfig treewide: replace '---help---' in Kconfig files with 'help' 2020-06-14 01:57:21 +09:00
Makefile perf/x86/rapl: Fix RAPL config variable bug 2020-06-02 11:52:56 +02:00
msr.c perf/x86/msr: Add Jasper Lake support 2020-09-29 09:57:02 +02:00
perf_event.h perf/x86/intel: Support TopDown metrics on Ice Lake 2020-08-18 16:34:37 +02:00
probe.c perf/x86/rapl: Make perf_probe_msr() more robust and flexible 2020-05-28 07:58:55 +02:00
probe.h
rapl.c perf/x86/rapl: Add AMD Fam19h RAPL support 2020-09-10 11:19:36 +02:00