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 E531DC433FE for ; Tue, 14 Dec 2021 18:28:45 +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=APNRDGipmXTkldyr5G9MODBoxotymb3bJpV5brVzN9w=; b=kSBLL+9nOwlNT/ xq8f7o3eT5bvRwSEFwEWqJ1FejwNfCWXa+lcb7iVYw/laqPxQfhY3nharpkg3b44Zogvv05Z7ePRD iE40JzpigtJF6XTqhXI4dsJHfPhC5PvZRuTJOJ2KA/9fQztidS88Rhjnex6NQkEDBFwq9d4/GRDMX yAXkjMXEbLgMVN/ZICsBxp7csaGX9X30Iz8oNPbAtHyFQkdrX/AKl47+uvqsd9EnIePeDhOLc3vZd pW7Z2HAelAq5QRUeThhvs3hNKFpO3BWstX+LqtqmNaBGsEQc+sAH7HQ2fUhAO9J/rWDlT/JO/yeM4 6U3qKH+zAIu9CayQgBTQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxCWD-00FJrZ-Nj; Tue, 14 Dec 2021 18:27:17 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mxCVy-00FJkz-ND for linux-arm-kernel@lists.infradead.org; Tue, 14 Dec 2021 18:27:04 +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 dfw.source.kernel.org (Postfix) with ESMTPS id 2B3FB6169F; Tue, 14 Dec 2021 18:27:01 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 89EEEC34600; Tue, 14 Dec 2021 18:27:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1639506420; bh=lWR5fG4CldO/Ezt4piZ1qkap5oqim5OBn0f7PejxEvs=; h=From:To:Cc:Subject:Date:From; b=h0GxdvjV3q/hUnz0d1qPrYRSlgof+ueA4qt2kGrkPGPAjzlrqvnnQW53rvCaYR68B OTa3j1wE8eURTD4QhIYVXeZQRxS5B85inB+pgMRTPX+x/+qfGM4o92jYZ/OxyvqpjC CCUJ1xiEiOkUeCY8uMAXl6cu5vd9BJ9WzUVpbv367fhqe7fcfoVIQdsbWOn3L1j+me Ua6BsBENRuoW/AnEBOEvjbHHlq1oeQUcCDUysKYCX/z/Lk1WfelEaLBHhGS0ZWsN6B agFevwFnL6bw9u8zEFAVinp//cmK/2iCInlzPlyEzXGSyOclgS4iM3fUg8NLwRCNFr qhLhtdpVFNazQ== Received: from cfbb000407.r.cam.camfibre.uk ([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 1mxCVu-00C7Tq-9O; Tue, 14 Dec 2021 18:26:58 +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 v3 00/10] drivers/perf: CPU PMU driver for Apple M1 Date: Tue, 14 Dec 2021 18:26:24 +0000 Message-Id: <20211214182634.727330-1-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-20211214_102702_898307_BEF230BF X-CRM114-Status: GOOD ( 22.06 ) 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 v2 [2]: - Reworked the way the FIQ virtual affinity is exposed (now coming from the DT instead of being internal to the irqchip driver) - Dropped the locking from the PMU driver after Mark's review - Required the exclude_guest flag to be set, as the PMU doesn't seem to be able to count guest events, at least by default - Dropped the counter-stop on interrupt and instead stop the whole PMU on interrupt - Dropped the kernel taint, as I couldn't find a good way to do that on first use - Collected RBs from Hector * 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 [2] https://lore.kernel.org/r/20211201134909.390490-1-maz@kernel.org Marc Zyngier (10): dt-bindings: arm-pmu: Document Apple PMU compatible strings dt-bindings: apple,aic: Add CPU PMU per-cpu pseudo-interrupts dt-bindings: apple,aic: Add affinity description for per-cpu pseudo-interrupts irqchip/apple-aic: Parse FIQ affinities from device-tree irqchip/apple-aic: Wire PMU interrupts arm64: dts: apple: Add t8103 PMU interrupt affinities arm64: dts: apple: Add t8301 PMU nodes irqchip/apple-aic: Move PMU-specific registers to their own include file 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 | 28 + arch/arm64/boot/dts/apple/t8103.dtsi | 24 + arch/arm64/include/asm/apple_m1_pmu.h | 64 ++ drivers/irqchip/irq-apple-aic.c | 95 ++- drivers/perf/Kconfig | 7 + drivers/perf/Makefile | 1 + drivers/perf/apple_m1_cpu_pmu.c | 584 ++++++++++++++++++ drivers/perf/arm_pmu.c | 2 + .../interrupt-controller/apple-aic.h | 2 + include/linux/perf/arm_pmu.h | 2 + 11 files changed, 789 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