linux-kernel - [RESEND][PATCH v4 0/3] perf/mem: AMD IBS improvements

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 for Android: free password hash cracker in your pocket

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

Message-ID: <20230725150206.184-1-ravi.bangoria@amd.com>
Date:   Tue, 25 Jul 2023 20:32:03 +0530
From:   Ravi Bangoria <ravi.bangoria@....com>
To:     <peterz@...radead.org>, <namhyung@...nel.org>, <acme@...nel.org>
CC:     <ravi.bangoria@....com>, <mingo@...nel.org>, <eranian@...gle.com>,
        <kan.liang@...ux.intel.com>, <jolsa@...nel.org>,
        <irogers@...gle.com>, <adrian.hunter@...el.com>,
        <leo.yan@...aro.org>, <kjain@...ux.ibm.com>,
        <linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sandipan.das@....com>, <ananth.narayan@....com>,
        <santosh.shukla@....com>
Subject: [RESEND][PATCH v4 0/3] perf/mem: AMD IBS improvements

Kernel IBS driver wasn't using new PERF_MEM_* APIs due to some of its
limitations. Mainly:

1. mem_lvl_num doesn't allow setting multiple sources whereas old API
   allows it. Setting multiple data sources is useful because IBS on
   pre-zen4 uarch doesn't provide fine granular DataSrc details (there
   is only one such DataSrc(2h) though).
2. perf mem sorting logic (sort__lvl_cmp()) ignores mem_lvl_num. perf
   c2c (c2c_decode_stats()) does not use mem_lvl_num at all.

Set mem_lvl_num, mem_remote and mem_hops for data_src via IBS. Handle
first issue using mem_lvl_num = ANY_CACHE | HOPS_0. In addition to
setting new API fields, convert all individual field assignments to
compile time wrapper macros built using PERF_MEM_S(). Also convert
DataSrc conditional code to array lookups.

v3: https://lore.kernel.org/r/20230407112459.548-1-ravi.bangoria@amd.com
v3->v4:
 - Tool patches were already picked up by Arnaldo. Resending only
   kernel patches with few tweaks in commit messages. No functionality
   changes.

Namhyung Kim (1):
  perf/x86/ibs: Set mem_lvl_num, mem_remote and mem_hops for data_src

Ravi Bangoria (2):
  perf/mem: Introduce PERF_MEM_LVLNUM_UNC
  perf/mem: Add PERF_MEM_LVLNUM_NA to PERF_MEM_NA

 arch/x86/events/amd/ibs.c       | 156 ++++++++++++++------------------
 include/linux/perf_event.h      |   3 +-
 include/uapi/linux/perf_event.h |   3 +-
 3 files changed, 72 insertions(+), 90 deletions(-)

-- 
2.41.0