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linux-stable/arch/x86/events
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Kan Liang 4a263bf331 perf/x86/intel: Don't extend the pseudo-encoding to GP counters 
The INST_RETIRED.PREC_DIST event (0x0100) doesn't count on SPR.
perf stat -e cpu/event=0xc0,umask=0x0/,cpu/event=0x0,umask=0x1/ -C0

 Performance counter stats for 'CPU(s) 0':

           607,246      cpu/event=0xc0,umask=0x0/
                 0      cpu/event=0x0,umask=0x1/

The encoding for INST_RETIRED.PREC_DIST is pseudo-encoding, which
doesn't work on the generic counters. However, current perf extends its
mask to the generic counters.

The pseudo event-code for a fixed counter must be 0x00. Check and avoid
extending the mask for the fixed counter event which using the
pseudo-encoding, e.g., ref-cycles and PREC_DIST event.

With the patch,
perf stat -e cpu/event=0xc0,umask=0x0/,cpu/event=0x0,umask=0x1/ -C0

 Performance counter stats for 'CPU(s) 0':

           583,184      cpu/event=0xc0,umask=0x0/
           583,048      cpu/event=0x0,umask=0x1/

Fixes: 2de71ee153 ("perf/x86/intel: Fix ICL/SPR INST_RETIRED.PREC_DIST encodings")
Signed-off-by: Kan Liang <kan.liang@linux.intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lkml.kernel.org/r/1648482543-14923-1-git-send-email-kan.liang@linux.intel.com
2022-04-05 09:59:44 +02:00
..
amd x86/events/amd/iommu: Remove redundant assignment to variable shift 2021-12-28 21:30:05 +01:00
intel perf/x86/intel: Don't extend the pseudo-encoding to GP counters 2022-04-05 09:59:44 +02:00
zhaoxin x86: Fix various typos in comments 2021-03-18 15:31:53 +01:00
core.c x86: remove __range_not_ok() 2022-02-25 09:36:05 +01:00
Kconfig perf/amd/uncore: Allow the driver to be built as a module 2021-08-26 09:14:36 +02:00
Makefile perf/x86/rapl: Fix RAPL config variable bug 2020-06-02 11:52:56 +02:00
msr.c perf/x86/msr: Add Raptor Lake CPU support 2022-04-05 09:59:43 +02:00
perf_event.h perf/x86/intel/lbr: Support LBR format V7 2022-01-18 12:09:48 +01:00
probe.c perf/x86/rapl: Add msr mask support 2021-02-10 14:44:54 +01:00
probe.h perf/x86/rapl: Add msr mask support 2021-02-10 14:44:54 +01:00
rapl.c perf/x86/rapl: fix AMD event handling 2022-01-18 12:09:48 +01:00