Commit 70b6f57f authored by Kan Liang's avatar Kan Liang Committed by Aichun Shi
Browse files

perf/x86/intel: Fix instructions:ppp support in Sapphire Rapids

mainline inclusion
from mainline-v5.14-rc1
commit 1d5c7880
category: feature
feature: SPR PMU core event enhancement
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I596BF



Intel-SIG: commit 1d5c7880 ("perf/x86/intel: Fix instructions:ppp
support in Sapphire Rapids")

-------------------------------------

perf/x86/intel: Fix instructions:ppp support in Sapphire Rapids

Perf errors out when sampling instructions:ppp.

$ perf record -e instructions:ppp -- true
Error:
The sys_perf_event_open() syscall returned with 22 (Invalid argument)
for event (instructions:ppp).

The instruction PDIR is only available on the fixed counter 0. The event
constraint has been updated to fixed0_constraint in
icl_get_event_constraints(). The Sapphire Rapids codes unconditionally
error out for the event which is not available on the GP counter 0.

Make the instructions:ppp an exception.

Fixes: 61b985e3 ("perf/x86/intel: Add perf core PMU support for Sapphire Rapids")
Reported-by: default avatarYasin, Ahmad <ahmad.yasin@intel.com>
Signed-off-by: default avatarKan Liang <kan.liang@linux.intel.com>
Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/1624029174-122219-4-git-send-email-kan.liang@linux.intel.com


Signed-off-by: default avatarYunying Sun <yunying.sun@intel.com>
Signed-off-by: default avatarJason Zeng <jason.zeng@intel.com>
Signed-off-by: default avatarAichun Shi <aichun.shi@intel.com>
parent 73527c57
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