Received-SPF: pass (google.com: domain of linux-kernel+bounces-125952-linux.lists.archive=gmail.com@vger.kernel.org designates 2604:1380:45d1:ec00::1 as permitted sender) client-ip=2604:1380:45d1:ec00::1;
From: Andrii Nakryiko <andrii@kernel.org>
To: x86@kernel.org,
	peterz@infradead.org,
	mingo@redhat.com,
	tglx@linutronix.de
Cc: bpf@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	jolsa@kernel.org,
	song@kernel.org,
	kernel-team@meta.com,
	Andrii Nakryiko <andrii@kernel.org>
Subject: [PATCH v4 0/4] perf/x86/amd: add LBR capture support outside of hardware events
Date: Sat, 30 Mar 2024 21:18:26 -0700
Message-ID: <20240331041830.2806741-1-andrii@kernel.org>
Precedence: bulk
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit

Add AMD-specific implementation of perf_snapshot_branch_stack static call that
allows LBR capture from arbitrary points in the kernel. This is utilized by
BPF programs. See patch #3 for all the details.

Patches #1 and #2 are preparatory steps to ensure LBR freezing is completely
inlined and have no branches, to minimize LBR snapshot contamination.

Patch #4 removes an artificial restriction on perf events with LBR enabled.

Andrii Nakryiko (4):
  perf/x86/amd: ensure amd_pmu_core_disable_all() is always inlined
  perf/x86/amd: avoid taking branches before disabling LBR
  perf/x86/amd: support capturing LBR from software events
  perf/x86/amd: don't reject non-sampling events with configured LBR

 arch/x86/events/amd/core.c   | 37 +++++++++++++++++++++++++++++++++++-
 arch/x86/events/amd/lbr.c    | 11 +----------
 arch/x86/events/perf_event.h | 11 +++++++++++
 3 files changed, 48 insertions(+), 11 deletions(-)

-- 
2.43.0