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linux/arch/powerpc/perf
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Kajol Jain e5f9d88586 powerpc/perf/hv-24x7: Dont create sysfs event files for dummy events 
The hv_24x7 performance monitoring unit creates a list of supported
events from the event catalog obtained via HCALL. The hv_24x7 catalog
could also contain invalid or dummy events with names like RESERVED*.
These events do not have any hardware counters backing them. Add a
check to string compare the event names to filter such events out.

Result on power9 machine:

Before this patch:
  .....
  hv_24x7/PM_XLINK2_OUT_ODD_CYC,chip=?/              [Kernel PMU event]
  hv_24x7/PM_XLINK2_OUT_ODD_DATA_COUNT,chip=?/       [Kernel PMU event]
  hv_24x7/PM_XLINK2_OUT_ODD_TOTAL_UTIL,chip=?/       [Kernel PMU event]
  hv_24x7/PM_XTS_ATR_DEMAND_CHECKOUT,chip=?/         [Kernel PMU event]
  hv_24x7/PM_XTS_ATR_DEMAND_CHECKOUT_MISS,chip=?/    [Kernel PMU event]
  hv_24x7/PM_XTS_ATSD_SENT,chip=?/                   [Kernel PMU event]
  hv_24x7/PM_XTS_ATSD_TLBI_RCV,chip=?/               [Kernel PMU event]
  hv_24x7/RESERVED_NEST1,chip=?/                     [Kernel PMU event]
  hv_24x7/RESERVED_NEST10,chip=?/                    [Kernel PMU event]
  hv_24x7/RESERVED_NEST11,chip=?/                    [Kernel PMU event]
  hv_24x7/RESERVED_NEST12,chip=?/                    [Kernel PMU event]
  hv_24x7/RESERVED_NEST13,chip=?/                    [Kernel PMU event]
  ......

dmesg:
  [    0.000362] printk: console [hvc0] enabled
  [    0.815452] hv-24x7: read 1530 catalog entries, created 537 event attrs (0 failures), 275 descs

After this patch:
  ......
  hv_24x7/PM_XLINK2_OUT_ODD_AVLBL_CYC,chip=?/        [Kernel PMU event]
  hv_24x7/PM_XLINK2_OUT_ODD_CYC,chip=?/              [Kernel PMU event]
  hv_24x7/PM_XLINK2_OUT_ODD_DATA_COUNT,chip=?/       [Kernel PMU event]
  hv_24x7/PM_XLINK2_OUT_ODD_TOTAL_UTIL,chip=?/       [Kernel PMU event]
  hv_24x7/PM_XTS_ATR_DEMAND_CHECKOUT,chip=?/         [Kernel PMU event]
  hv_24x7/PM_XTS_ATR_DEMAND_CHECKOUT_MISS,chip=?/    [Kernel PMU event]
  hv_24x7/PM_XTS_ATSD_SENT,chip=?/                   [Kernel PMU event]
  hv_24x7/PM_XTS_ATSD_TLBI_RCV,chip=?/               [Kernel PMU event]
  hv_24x7/TOD,chip=?/                                [Kernel PMU event]
  ......

dmesg:
  [    0.000357] printk: console [hvc0] enabled
  [    0.808592] hv-24x7: read 1530 catalog entries, created 509 event attrs (0 failures), 275 descs

Signed-off-by: Kajol Jain <kjain@linux.ibm.com>
[mpe: Simplify ignore_event(), minor change log formatting]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201228085204.18026-1-kjain@linux.ibm.com
2021-01-30 11:39:25 +11:00
..
req-gen powerpc: clean the inclusion of stringify.h 2018-07-30 22:48:17 +10:00
8xx-pmu.c powerpc/ppc-opcode: Add PPC_RAW_MFSPR() 2020-12-09 23:48:13 +11:00
bhrb.S treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
callchain_32.c powerpc/vdso: Retrieve sigtramp offsets at buildtime 2020-12-04 01:01:17 +11:00
callchain_64.c powerpc/vdso: Retrieve sigtramp offsets at buildtime 2020-12-04 01:01:17 +11:00
callchain.c mm: don't include asm/pgtable.h if linux/mm.h is already included 2020-06-09 09:39:13 -07:00
callchain.h powerpc/64s/perf: perf interrupt does not have to get_user_pages to access user memory 2020-11-19 16:56:52 +11:00
core-book3s.c powerpc updates for 5.11 2020-12-17 13:34:25 -08:00
core-fsl-emb.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
e500-pmu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
e6500-pmu.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
generic-compat-pmu.c powerpc/perf: Update Power PMU cache_events to u64 type 2020-07-22 21:56:40 +10:00
hv-24x7-catalog.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hv-24x7-domains.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hv-24x7.c powerpc/perf/hv-24x7: Dont create sysfs event files for dummy events 2021-01-30 11:39:25 +11:00
hv-24x7.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hv-common.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hv-common.h License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
hv-gpci-requests.h powerpc/perf/hv-gpci: Fix starting index value 2020-10-07 22:34:48 +11:00
hv-gpci.c powerpc/hv-gpci: Add sysfs files inside hv-gpci device to show cpumask 2020-10-07 22:34:49 +11:00
hv-gpci.h powerpc/perf: consolidate GPCI hcall structs into asm/hvcall.h 2020-09-02 11:00:20 +10:00
imc-pmu.c powerpc: fix -Wimplicit-fallthrough 2020-11-18 14:18:09 -06:00
internal.h powerpc/perf: power10 Performance Monitoring support 2020-07-22 21:56:41 +10:00
isa207-common.c powerpc/perf: Fix Threshold Event Counter Multiplier width for P10 2020-12-15 22:50:04 +11:00
isa207-common.h powerpc/perf: Fix Threshold Event Counter Multiplier width for P10 2020-12-15 22:50:04 +11:00
Makefile powerpc/perf: power10 Performance Monitoring support 2020-07-22 21:56:41 +10:00
mpc7450-pmu.c powerpc/perf: Update Power PMU cache_events to u64 type 2020-07-22 21:56:40 +10:00
perf_regs.c perf/arch: Remove perf_sample_data::regs_user_copy 2020-11-09 18:12:34 +01:00
power5-pmu.c powerpc/perf: Add declarations to fix sparse warnings 2020-09-18 19:59:43 +10:00
power5+-pmu.c powerpc/perf: Add declarations to fix sparse warnings 2020-09-18 19:59:43 +10:00
power6-pmu.c powerpc/perf: Add declarations to fix sparse warnings 2020-09-18 19:59:43 +10:00
power7-events-list.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
power7-pmu.c powerpc/perf: Add declarations to fix sparse warnings 2020-09-18 19:59:43 +10:00
power8-events-list.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
power8-pmu.c powerpc/perf: Update Power PMU cache_events to u64 type 2020-07-22 21:56:40 +10:00
power9-events-list.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152 2019-05-30 11:26:32 -07:00
power9-pmu.c powerpc/perf: Add support for outputting extended regs in perf intr_regs 2020-08-17 13:11:22 +10:00
power10-events-list.h powerpc/perf: Fix to update cache events with l2l3 events in power10 2020-12-04 01:01:29 +11:00
power10-pmu.c powerpc/perf: Fix to update cache events with l2l3 events in power10 2020-12-04 01:01:29 +11:00
ppc970-pmu.c powerpc/perf: Add declarations to fix sparse warnings 2020-09-18 19:59:43 +10:00