From patchwork Wed Nov 15 03:36:06 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ji Sheng Teoh X-Patchwork-Id: 744147 Received: from lindbergh.monkeyblade.net (lindbergh.monkeyblade.net [23.128.96.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9EB4823AE for ; Wed, 15 Nov 2023 03:41:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=none Received: from ex01.ufhost.com (ex01.ufhost.com [61.152.239.75]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E40A1C5; Tue, 14 Nov 2023 19:41:02 -0800 (PST) Received: from EXMBX165.cuchost.com (unknown [175.102.18.54]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "EXMBX165", Issuer "EXMBX165" (not verified)) by ex01.ufhost.com (Postfix) with ESMTP id 2330524E2BC; Wed, 15 Nov 2023 11:40:50 +0800 (CST) Received: from EXMBX172.cuchost.com (172.16.6.92) by EXMBX165.cuchost.com (172.16.6.75) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Wed, 15 Nov 2023 11:40:50 +0800 Received: from localhost.localdomain (202.188.176.82) by EXMBX172.cuchost.com (172.16.6.92) with Microsoft SMTP Server (TLS) id 15.0.1497.42; Wed, 15 Nov 2023 11:40:46 +0800 From: Ji Sheng Teoh To: Will Deacon , Mark Rutland , "Rob Herring" , Krzysztof Kozlowski , Conor Dooley , Thomas Gleixner , Peter Zijlstra CC: Ji Sheng Teoh , Ley Foon Tan , , , Subject: [PATCH v3 0/2] StarFive's StarLink PMU Support Date: Wed, 15 Nov 2023 11:36:06 +0800 Message-ID: <20231115033608.1597807-1-jisheng.teoh@starfivetech.com> X-Mailer: git-send-email 2.25.1 Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Originating-IP: [202.188.176.82] X-ClientProxiedBy: EXCAS062.cuchost.com (172.16.6.22) To EXMBX172.cuchost.com (172.16.6.92) X-YovoleRuleAgent: yovoleflag Changes since v2: - Change compatible field from generic "starfive,starlink-pmu" to "starfive,starlink-500-pmu" with specific IP versioning in bindings and driver. - Fix warning '-Wmissing-prototypes' reported by kernel test robot, by appending static to starlink_pmu_set_event_period() in starfive_starlink_pmu.c. Changes since v1: - Change 'depends on SOC_STARFIVE' to 'depends on ARCH_STARFIVE' in Kconfig ---- This patch series adds support for StarFive's Starlink Performance Monitor Unit(PMU). StarFive's StarLink PMU integrates one or more CPU cores with a shared L3 memory system. The PMU supports overflow interrupt, up to 16 programmable 64bit event counters, and an independent 64bit cycle counter. StarLink PMU is accessed via MMIO. Example Perf stat output: [root@user]# perf stat -a -e /starfive_starlink_pmu/cycles/ \ -e /starfive_starlink_pmu/read_miss/ \ -e /starfive_starlink_pmu/read_hit/ \ -e /starfive_starlink_pmu/release_request/ \ -e /starfive_starlink_pmu/write_hit/ \ -e /starfive_starlink_pmu/write_miss/ \ -e /starfive_starlink_pmu/write_request/ \ -e /starfive_starlink_pmu/writeback/ \ -e /starfive_starlink_pmu/read_request/ \ -- openssl speed rsa2048 Doing 2048 bits private rsa's for 10s: 5 2048 bits private RSA's in 2.84s Doing 2048 bits public rsa's for 10s: 169 2048 bits public RSA's in 2.42s version: 3.0.11 built on: Tue Sep 19 13:02:31 2023 UTC options: bn(64,64) CPUINFO: N/A sign verify sign/s verify/s rsa 2048 bits 0.568000s 0.014320s 1.8 69.8 ///////// Performance counter stats for 'system wide': 649991998 starfive_starlink_pmu/cycles/ 1009690 starfive_starlink_pmu/read_miss/ 1079750 starfive_starlink_pmu/read_hit/ 2089405 starfive_starlink_pmu/release_request/ 129 starfive_starlink_pmu/write_hit/ 70 starfive_starlink_pmu/write_miss/ 194 starfive_starlink_pmu/write_request/ 150080 starfive_starlink_pmu/writeback/ 2089423 starfive_starlink_pmu/read_request/ 27.062755678 seconds time elapsed Ji Sheng Teoh (2): perf: starfive: Add StarLink PMU support dt-bindings: perf: starfive: Add StarLink PMU .../bindings/perf/starfive,starlink-pmu.yaml | 46 ++ drivers/perf/Kconfig | 9 + drivers/perf/Makefile | 1 + drivers/perf/starfive_starlink_pmu.c | 654 ++++++++++++++++++ include/linux/cpuhotplug.h | 1 + 5 files changed, 711 insertions(+) create mode 100644 Documentation/devicetree/bindings/perf/starfive,starlink-pmu.yaml create mode 100644 drivers/perf/starfive_starlink_pmu.c