From nobody Mon Feb 9 10:28:03 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 82B26C0015E for ; Tue, 11 Jul 2023 08:25:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231308AbjGKIZs (ORCPT ); Tue, 11 Jul 2023 04:25:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44240 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231406AbjGKIZm (ORCPT ); Tue, 11 Jul 2023 04:25:42 -0400 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1F1091728; Tue, 11 Jul 2023 01:25:32 -0700 (PDT) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 8DD5B2B; Tue, 11 Jul 2023 01:26:14 -0700 (PDT) Received: from a077893.arm.com (unknown [10.163.47.87]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 405B23F740; Tue, 11 Jul 2023 01:25:27 -0700 (PDT) From: Anshuman Khandual To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, will@kernel.org, catalin.marinas@arm.com, mark.rutland@arm.com Cc: Anshuman Khandual , Mark Brown , James Clark , Rob Herring , Marc Zyngier , Suzuki Poulose , Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , linux-perf-users@vger.kernel.org Subject: [PATCH V13 - RESEND 04/10] arm64/perf: Add branch stack support in struct pmu_hw_events Date: Tue, 11 Jul 2023 13:54:49 +0530 Message-Id: <20230711082455.215983-5-anshuman.khandual@arm.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230711082455.215983-1-anshuman.khandual@arm.com> References: <20230711082455.215983-1-anshuman.khandual@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" This adds branch records buffer pointer in 'struct pmu_hw_events' which can be used to capture branch records during PMU interrupt. This percpu pointer here needs to be allocated first before usage. Cc: Catalin Marinas Cc: Will Deacon Cc: Mark Rutland Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Tested-by: James Clark Acked-by: Mark Rutland Signed-off-by: Anshuman Khandual --- include/linux/perf/arm_pmu.h | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/include/linux/perf/arm_pmu.h b/include/linux/perf/arm_pmu.h index 5ecd3d0e7645..2dd5bcd3080d 100644 --- a/include/linux/perf/arm_pmu.h +++ b/include/linux/perf/arm_pmu.h @@ -46,6 +46,13 @@ static_assert((PERF_EVENT_FLAG_ARCH & ARMPMU_EVT_63BIT) = =3D=3D ARMPMU_EVT_63BIT); }, \ } =20 +#define MAX_BRANCH_RECORDS 64 + +struct branch_records { + struct perf_branch_stack branch_stack; + struct perf_branch_entry branch_entries[MAX_BRANCH_RECORDS]; +}; + /* The events for a given PMU register set. */ struct pmu_hw_events { /* @@ -72,6 +79,8 @@ struct pmu_hw_events { struct arm_pmu *percpu_pmu; =20 int irq; + + struct branch_records *branches; }; =20 enum armpmu_attr_groups { --=20 2.25.1