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mirror_ubuntu-kernels/arch/x86/events/intel
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Stephane Eranian d1e7e602cd perf/x86/intel: Move regs->flags EXACT bit init 
This patch removes a redundant store on regs->flags introduced
by commit:

  71eb9ee959 ("perf/x86/intel: Fix linear IP of PEBS real_ip on Haswell and later CPUs")

We were clearing the PERF_EFLAGS_EXACT but it was overwritten by
regs->flags = pebs->flags later on.

The PERF_EFLAGS_EXACT is a software flag using bit 3 of regs->flags.
X86 marks this bit as Reserved. To make sure this bit is zero before
we do any IP processing, we clear it explicitly.

Patch also removes the following assignment:

	regs->flags = pebs->flags | (regs->flags & PERF_EFLAGS_VM);

Because there is no regs->flags to preserve anymore because
set_linear_ip() is not called until later.

Signed-off-by: Stephane Eranian <eranian@google.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: kan.liang@intel.com
Link: http://lkml.kernel.org/r/1522909791-32498-1-git-send-email-eranian@google.com
[ Improve capitalization, punctuation and clarity of comments. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2018-04-05 09:28:40 +02:00
..
bts.c x86,perf: Disable intel_bts when PTI 2018-01-14 11:42:10 +01:00
core.c Merge branch 'perf/urgent' into perf/core, to pick up fixes 2018-03-24 09:21:47 +01:00
cstate.c perf/x86/intel: Enable C-state residency events for Cannon Lake 2018-03-31 11:28:36 +02:00
ds.c perf/x86/intel: Move regs->flags EXACT bit init 2018-04-05 09:28:40 +02:00
knc.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
lbr.c x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping 2018-02-15 01:15:52 +01:00
Makefile License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
p4.c x86: Mark various structures and functions as 'static' 2017-08-11 14:49:43 +02:00
p6.c x86/cpu: Rename cpu_data.x86_mask to cpu_data.x86_stepping 2018-02-15 01:15:52 +01:00
pt.c perf/x86/pt, coresight: Clean up address filter structure 2018-03-29 16:07:22 +02:00
pt.h
rapl.c perf/x86/intel: Add Cannon Lake support for RAPL profiling 2018-03-31 11:28:36 +02:00
uncore_nhmex.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
uncore_snb.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
uncore_snbep.c perf/x86/intel/uncore: Fix multi-domain PCI CHA enumeration bug on Skylake servers 2018-03-20 08:58:47 +01:00
uncore.c perf: Fix sibling iteration 2018-03-16 20:44:12 +01:00
uncore.h perf/x86/intel/uncore: Cache logical pkg id in uncore driver 2017-11-17 16:22:30 +01:00