From mboxrd@z Thu Jan 1 00:00:00 1970 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 67DAEC433F5 for ; Wed, 1 Dec 2021 13:51:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-Id:Date:Subject:Cc :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=krANhZqJxd0gj+T9kf476lwAkKa4ifBanJq4NBa24N0=; b=fI/8evRyuhMqKB ndky6w5mSYNP5rfDsGUlUx8wIqCI91fXbGoWRvWupvzW/pCUQR3BFLpfBS+mSg2wb2QxiMuvGW76p uGLA9bpwD0mkqd2+fVQkqKy+V/4zbuwhiWoZq5N64ednKBG7zLtSEWMTXR0oLaVQHk8LYZKc2f6i6 QyLC9UlCWhRsb1KTOuhFmYwMbImLj/59dUDNGDg1Dj4UPpnfUS2BfCKmCqE861RHqCSVW+6rOR9/g B70FqlQA6Os8O1dyyIquCvFQJBWh8Ib8XeXScTEb1iVdD/eDll9i12f5xnXvjZoXsI1mSX9jU1z/f vEumaQ+4ed0HZD8ifsmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1msPzF-008tMA-89; Wed, 01 Dec 2021 13:49:29 +0000 Received: from ams.source.kernel.org ([145.40.68.75]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1msPz8-008tIp-Vq for linux-arm-kernel@lists.infradead.org; Wed, 01 Dec 2021 13:49:24 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 9EB90B81EEB; Wed, 1 Dec 2021 13:49:21 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 59C52C53FCC; Wed, 1 Dec 2021 13:49:20 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638366560; bh=HEReuV7gswevA5y2LP1YzSmPqDGDjaqY08h/BUth7yc=; h=From:To:Cc:Subject:Date:From; b=sn3HlZrIbJXw0GUCQniF/Wtcq1/mL42xv7j9bVX3/lGN3mEHkTcUhlYA3h4DDgBa6 dKWPr91dX0yCzXdshKbfM8MCM6Ve9R9amyNn1jC4XcqQLLRYwjHSLtrVKUEjzZyGHf GQx2T3cj40jTY8kaMst+mRWMhpZQHyr8tZm2sAcWXoiOoscUBndAWumXSCwl4CrNCo TE438krE7bvZMhUMBGnHzbnEdPH4ESwjqQO9A7MMRBtHuuJgew39glz19zaZh+Lc2E vp1OBDpTcCM6/rZhxC+qaxOuVeejjxrlrgaCPJ5BOyRLKX1QL2kBlcpXstkHAzy/vk rKmbeiB2x8nYQ== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1msPz4-0098G7-50; Wed, 01 Dec 2021 13:49:18 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Mark Rutland , Will Deacon , Hector Martin , Sven Peter , Alyssa Rosenzweig , Rob Herring , Thomas Gleixner , Dougall , kernel-team@android.com Subject: [PATCH v2 0/8] drivers/perf: CPU PMU driver for Apple M1 Date: Wed, 1 Dec 2021 13:49:01 +0000 Message-Id: <20211201134909.390490-1-maz@kernel.org> X-Mailer: git-send-email 2.30.2 MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, mark.rutland@arm.com, will@kernel.org, marcan@marcan.st, sven@svenpeter.dev, alyssa@rosenzweig.io, robh+dt@kernel.org, tglx@linutronix.de, dougallj@gmail.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211201_054923_335388_21CC3F65 X-CRM114-Status: GOOD ( 17.60 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The M1 SoC embeds a per-CPU PMU that has a very different programming interface compared to the architected PMUv3 that is normally present on standard implementations. This small series adds a driver for this HW by leveraging the arm_pmu infrastructure, resulting in a rather simple driver. Of course, we know next to nothing about the actual events this PMU counts, aside from CPU cycles and instructions. Everything else is undocumented (though as Dougall pointed out, someone could extract the relevant information from a macOS install if they wanted -- I don't). My hope is that this driver will help people to explore the event space and propose possible interpretations for these events using reproducible test cases. * From v1 [1]: - Added a few comments clarifying the event mapping to counters - Spelling fixes - Collected Acks from Rob [1] https://lore.kernel.org/r/20211113115429.4027571-1-maz@kernel.org Marc Zyngier (8): dt-bindings: arm-pmu: Document Apple PMU compatible strings dt-bindings: apple,aic: Add CPU PMU per-cpu pseudo-interrupts irqchip/apple-aic: Add cpumasks for E and P cores irqchip/apple-aic: Wire PMU interrupts irqchip/apple-aic: Move PMU-specific registers to their own include file arm64: apple: t8301: Add PMU nodes drivers/perf: arm_pmu: Handle 47 bit counters drivers/perf: Add Apple icestorm/firestorm CPU PMU driver .../devicetree/bindings/arm/pmu.yaml | 2 + .../interrupt-controller/apple,aic.yaml | 2 + arch/arm64/boot/dts/apple/t8103.dtsi | 12 + arch/arm64/include/asm/apple_m1_pmu.h | 64 ++ drivers/irqchip/irq-apple-aic.c | 59 +- drivers/perf/Kconfig | 7 + drivers/perf/Makefile | 1 + drivers/perf/apple_m1_cpu_pmu.c | 637 ++++++++++++++++++ drivers/perf/arm_pmu.c | 2 + .../interrupt-controller/apple-aic.h | 2 + include/linux/perf/arm_pmu.h | 2 + 11 files changed, 768 insertions(+), 22 deletions(-) create mode 100644 arch/arm64/include/asm/apple_m1_pmu.h create mode 100644 drivers/perf/apple_m1_cpu_pmu.c -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel