linux-kernel - [PATCH 00/11] perf/amd/ibs: Fixes + future enhancements

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]

Message-ID: <20260116033450.965-1-ravi.bangoria@amd.com>
Date: Fri, 16 Jan 2026 03:34:39 +0000
From: Ravi Bangoria <ravi.bangoria@....com>
To: Peter Zijlstra <peterz@...radead.org>, Ingo Molnar <mingo@...hat.com>
CC: Ravi Bangoria <ravi.bangoria@....com>, Arnaldo Carvalho de Melo
	<acme@...nel.org>, Namhyung Kim <namhyung@...nel.org>, Ian Rogers
	<irogers@...gle.com>, Dapeng Mi <dapeng1.mi@...ux.intel.com>, James Clark
	<james.clark@...aro.org>, <x86@...nel.org>,
	<linux-perf-users@...r.kernel.org>, <linux-kernel@...r.kernel.org>, "Manali
 Shukla" <manali.shukla@....com>, Santosh Shukla <santosh.shukla@....com>,
	Ananth Narayan <ananth.narayan@....com>, Sandipan Das <sandipan.das@....com>
Subject: [PATCH 00/11] perf/amd/ibs: Fixes + future enhancements

Patches 1-5:
  o Resolve several issues in the current IBS implementation

Patches 6-11:
  o Add support for new capabilities that will appear in future AMD
    CPUs:
    - Alternate disable bit in with control only MSRs to eliminate the
      RMW race in existing IBS_{FETCH|OP}_CTL MSRs
    - RIP bit 63 filtering, which can be used as hardware assisted
      privilege filtering, enabling IBS for unprivileged users without
      software based privilege filtering
    - Fetch latency threshold filter to capture only high-latency fetch
      events
    - Streaming-store filter to sample only instructions that perform
      streaming stores
    - Remote socket indicator for load/store instructions

Patches are prepared on tip/perf/core (eebe6446ccb7)

TODO:
  o perf tool and man page changes
  o perf test "AMD IBS software filtering" is failing on system that
    supports RIP bit63 filtering, but it's false-positive. I'll post
    a fix along with perf tools changes

Ravi Bangoria (11):
  perf/amd/ibs: Throttle interrupts with filtered ldlat samples
  perf/amd/ibs: Limit ldlat->l3missonly dependency to Zen5
  perf/amd/ibs: Preserve PhyAddrVal bit when clearing PhyAddr MSR
  perf/amd/ibs: Avoid race between event add and NMI
  perf/amd/ibs: Define macro for ldlat mask
  perf/amd/ibs: Add new MSRs and CPUID bits definitions
  perf/amd/ibs: Support IBS_{FETCH|OP}_CTL2[Dis] to eliminate RMW race
  perf/amd/ibs: Enable fetch latency filtering
  perf/amd/ibs: Enable RIP bit63 hardware filtering
  perf/amd/ibs: Enable streaming store filter
  perf/amd/ibs: Advertise remote socket capability

 arch/x86/events/amd/ibs.c         | 252 ++++++++++++++++++++++++++++--
 arch/x86/include/asm/amd/ibs.h    |   4 +-
 arch/x86/include/asm/msr-index.h  |   2 +
 arch/x86/include/asm/perf_event.h |  52 +++---
 4 files changed, 275 insertions(+), 35 deletions(-)

-- 
2.43.0