From: Ravi Bangoria <ravi.bangoria@amd.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
"Jim Mattson" <jmattson@google.com>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>,
Jayapal Ashwin Nair <janair@amd.com>,
Gennady Kupava <gennady.kupava@gmail.com>,
Dapeng Mi <dapeng1.mi@linux.intel.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Ian Rogers <irogers@google.com>, <x86@kernel.org>,
<linux-perf-users@vger.kernel.org>,
<linux-kernel@vger.kernel.org>,
Santosh Shukla <santosh.shukla@amd.com>,
Ananth Narayan <ananth.narayan@amd.com>,
Sandipan Das <sandipan.das@amd.com>,
Manali Shukla <manali.shukla@amd.com>
Subject: [PATCH v2 0/3] perf/amd/ibs: Assorted fixes
Date: Mon, 26 Oct 2026 04:18:34 +0000 [thread overview]
Message-ID: <20261026041838.941-1-ravi.bangoria@amd.com> (raw)
#1 Set IBS MSRs in syscore->resume() callback
#2 Fix kernel address leak through REGS_USER and REGS_INTR
#3 Fix races by reducing SW states when IBS_CAPS_DIS is present
v1: https://lore.kernel.org/r/20261015060430.5877-1-ravi.bangoria@amd.com
v1->v2:
- Use interrupt registers when preparing REGS_USER and REGS_INTR. In
addition to fixing the kernel address leak, this change also ensures
GPR snapshot consistency, which resolves the DWARF unwinding issue
with IBS [1].
[1] https://lore.kernel.org/r/CAPu-DQqF0aF6=GS8Z6KKWeeX_V5LiXeKU_rJQZC+uGg8zuTPNw@mail.gmail.com
Ravi Bangoria (3):
perf/amd/ibs: Reset CPU0 IBS state on syscore resume
perf/amd/ibs: Fix kernel address leak via REGS_USER and REGS_INTR
perf/amd/ibs: Simplify event state handling with IBS_CAPS_DIS
arch/x86/events/amd/ibs.c | 197 ++++++++++++++++++++++++++++++++-----
include/linux/perf_event.h | 6 ++
kernel/events/core.c | 10 +-
3 files changed, 184 insertions(+), 29 deletions(-)
--
2.55.0
next reply other threads:[~2026-10-26 4:19 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-26 4:18 Ravi Bangoria [this message]
2026-10-26 4:18 ` [PATCH v2 1/3] perf/amd/ibs: Reset CPU0 IBS state on syscore resume Ravi Bangoria
2026-10-26 4:18 ` [PATCH v2 2/3] perf/amd/ibs: Fix kernel address leak via REGS_USER and REGS_INTR Ravi Bangoria
2026-10-26 5:52 ` Jayapal Ashwin Nair
2026-10-26 9:14 ` Mi, Dapeng
2026-10-26 4:18 ` [PATCH v3 3/3] perf/amd/ibs: Simplify event state handling with IBS_CAPS_DIS Ravi Bangoria
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