linux-kernel - [PATCH 0/2] perf, intel: Add support for PEBS output to Intel PT

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu,  2 May 2019 13:50:20 +0300
From:   Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To:     Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc:     Arnaldo Carvalho de Melo <acme@...hat.com>,
        Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
        jolsa@...hat.com, adrian.hunter@...el.com,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Subject: [PATCH 0/2] perf, intel: Add support for PEBS output to Intel PT

Hi Peter,

New PEBS feature: output to Intel PT stream instead of the DS area. It's
theoretically useful in virtualized environments, where DS area can't be
used. It's also good for those who are interested in instruction trace for
context of the PEBS events. As PEBS goes, it can provide LBR context with
all the branch-related information that PT doesn't provide at the moment.

PEBS records are packetized in the PT stream, so instead of extracting
them in the PMI, we leave it to the perf tool, because real time PT
decoding is not practical. Tooling patches are not included, but can be
found here [1].

Added is an attribute bit 'aux_source' to mean that an event is a source of
AUX data. This bit enables PEBS output to PT.

[1] http://git.infradead.org/users/ahunter/linux-perf.git

Alexander Shishkin (2):
  perf: Allow normal events to be sources of AUX data
  perf/x86/intel: Support PEBS output to PT

 arch/x86/events/intel/core.c     | 13 +++++++
 arch/x86/events/intel/ds.c       | 59 +++++++++++++++++++++++++++++++-
 arch/x86/events/perf_event.h     |  9 +++++
 arch/x86/include/asm/msr-index.h |  3 ++
 include/uapi/linux/perf_event.h  |  3 +-
 kernel/events/core.c             |  9 +++++
 6 files changed, 94 insertions(+), 2 deletions(-)

-- 
2.20.1