linux-kernel - [PATCH v4 0/4] tools perf: Add branch speculation info

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Date:   Thu, 2 Feb 2023 17:56:13 +0530
From:   Sandipan Das <sandipan.das@....com>
To:     <linux-kernel@...r.kernel.org>, <linux-perf-users@...r.kernel.org>,
        <x86@...nel.org>
CC:     <peterz@...radead.org>, <bp@...en8.de>, <acme@...nel.org>,
        <namhyung@...nel.org>, <jolsa@...nel.org>, <tglx@...utronix.de>,
        <mingo@...hat.com>, <mark.rutland@....com>,
        <alexander.shishkin@...ux.intel.com>,
        <dave.hansen@...ux.intel.com>, <james.clark@....com>,
        <irogers@...gle.com>, <eranian@...gle.com>, <maddy@...ux.ibm.com>,
        <kjain@...ux.ibm.com>, <tmricht@...ux.ibm.com>,
        <ananth.narayan@....com>, <ravi.bangoria@....com>,
        <santosh.shukla@....com>, <sandipan.das@....com>
Subject: [PATCH v4 0/4] tools perf: Add branch speculation info

AMD Last Branch Record Extension Version 2 (LbrExtV2) provides branch
speculation information and the perf UAPI is extended to provide this in
a generic way. Make perf tool show this additional information.

The UAPI changes can be found in commit 93315e46b000 ("perf/core: Add
speculation info to branch entries").

Requesting help from folks having access to big-endian systems to test
changes in the sample parsing test as I was only able to test these in
a ppc64 simulator.

Previous versions can be found at:
v3: https://lore.kernel.org/all/cover.1675057032.git.sandipan.das@amd.com/
v2: https://lore.kernel.org/all/cover.1664356751.git.sandipan.das@amd.com/
v1: https://lore.kernel.org/all/cover.1660217326.git.sandipan.das@amd.com/

Changes in v4:
- Update tests that were failing due to changes in perf output and
  sample parsing (thanks to Arnaldo for reporting).

Changes in v3:
- Drop tools-side UAPI changes as they have already been added by other
  commits.
- Rebase on top of latest perf/core.

Changes in v2:
- Drop msr-index.h related changes for now.
- Rebase on top of latest perf/core.
- Fix UAPI breakage introduced by the ARM64 BRBE changes to perf branch
  entry.

Sandipan Das (4):
  perf script: Show branch speculation info
  perf session: Show branch speculation info in raw dump
  perf test sample-parsing: Update expected branch flags
  perf test brstack: Update regex to include spec field

 tools/perf/builtin-script.c            |  5 +++--
 tools/perf/tests/sample-parsing.c      |  2 +-
 tools/perf/tests/shell/test_brstack.sh | 18 +++++++++---------
 tools/perf/util/branch.c               | 15 +++++++++++++++
 tools/perf/util/branch.h               |  2 ++
 tools/perf/util/evsel.c                | 15 ++++++++++++---
 tools/perf/util/session.c              |  5 +++--
 7 files changed, 45 insertions(+), 17 deletions(-)

-- 
2.34.1