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 X-Spam-Level: X-Spam-Status: No, score=-5.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING, SPF_PASS,T_DKIMWL_WL_HIGH,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E8897C004C9 for ; Tue, 7 May 2019 17:58:46 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id BEA902054F for ; Tue, 7 May 2019 17:58:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="fa8cr2Rj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BEA902054F Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender:Content-Type: Content-Transfer-Encoding:Cc:List-Subscribe:List-Help:List-Post:List-Archive: List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:Date:Message-ID:From: References:To:Subject:Reply-To:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=eg384mK6mhSmhCqbXCQprzuqCp6ghsaqvKgWfENAaYY=; b=fa8cr2RjEzHu+gw/nUJaKd+L/ oKUkAeMVaxsDPd9hMXX2Lqb+WMBtuorHhiaXqUbZxxYILUFlbkxGl6uZNFtf/AmGxiQQM5wu0CX0M MM9eYaUkmzCLesojpe0ApzZBQmOMIn8MAntap9WDCn63fs/bP6BS7tpK+/hICc02JI3fLNip5EfKE HSrZk5sCOMUxHk/IGhtOD9DbhhWG0mjAhKdTSS1sNEm7DiPeWAzvmRvdtAi0Amnk9RQgS8SwKpBOv UZODskx9VGvV74CmCUSBJ9SoHYGO6LKUThmNxD/BRNRG4T8rRgDpwL7Cdcx7H6k54gCnyucKRHa3e 8Fq27itxA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hO4MU-0001HK-QL; Tue, 07 May 2019 17:58:42 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1hO4MR-0001Gy-EZ for linux-arm-kernel@lists.infradead.org; Tue, 07 May 2019 17:58:40 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 01B23A78; Tue, 7 May 2019 10:58:37 -0700 (PDT) Received: from [192.168.100.241] (usa-sjc-mx-foss1.foss.arm.com [217.140.101.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id C52043F5AF; Tue, 7 May 2019 10:58:33 -0700 (PDT) Subject: Re: [PATCH v3 0/5] arm64: SPE ACPI enablement To: Hanjun Guo , linux-arm-kernel@lists.infradead.org References: <20190503232407.37195-1-jeremy.linton@arm.com> <5eaa1607-4bf0-a320-e9cf-2d51eca912c6@huawei.com> From: Jeremy Linton Message-ID: <82032e5b-0cb5-e48f-ab51-ba5d5f9dceec@arm.com> Date: Tue, 7 May 2019 12:58:25 -0500 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0 MIME-Version: 1.0 In-Reply-To: <5eaa1607-4bf0-a320-e9cf-2d51eca912c6@huawei.com> Content-Language: en-US X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190507_105839_495843_D3AC5B4C X-CRM114-Status: GOOD ( 20.58 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, lorenzo.pieralisi@arm.com, will.deacon@arm.com, sudeep.holla@arm.com, rjw@rjwysocki.net, linuxarm@huawei.com, linux-acpi@vger.kernel.org, catalin.marinas@arm.com, john.garry@huawei.com, lenb@kernel.org Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset="us-ascii"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi, On 5/4/19 6:06 AM, Hanjun Guo wrote: > Hi Jeremy, Mark, > > On 2019/5/4 7:24, Jeremy Linton wrote: >> This patch series enables the Arm Statistical Profiling >> Extension (SPE) on ACPI platforms. >> >> This is possible because ACPI 6.3 uses a previously >> reserved field in the MADT to store the SPE interrupt >> number, similarly to how the normal PMU is described. >> If a consistent valid interrupt exists across all the >> cores in the system, a platform device is registered. >> That then triggers the SPE module, which runs as normal. >> >> We also add the ability to parse the PPTT for IDENTICAL >> cores. We then use this to sanity check the single SPE >> device we create. This creates a bit of a problem with >> respect to the specification though. The specification >> says that its legal for multiple tree's to exist in the >> PPTT. We handle this fine, but what happens in the >> case of multiple tree's is that the lack of a common >> node with IDENTICAL set forces us to assume that there >> are multiple non-IDENTICAL cores in the machine. > > Adding this patch set on top of latest mainline kernel, > and tested on D06 which has the SPE feature, in boot message > shows it was probed successfully: > > arm_spe_pmu arm,spe-v1: probed for CPUs 0-95 [max_record_sz 128, align 4, features 0x7] > > but when I test it with spe events such as > > perf record -c 1024 -e arm_spe_0/branch_filter=0/ -o spe ls > > it fails with: > failed to mmap with 12 (Cannot allocate memory), > > Confirmed that patch [0] is merged and other perf events are working > fine. Its pretty easy to get into the weeds with this driver, does it work with examples like: https://lkml.org/lkml/2018/1/14/122 > I narrowed this issue down that mmap() failed to alloc 4M memory > in perf tool but seems have no relationship with this SPE patch set, > then I'm lost, could you take look please? > > Thanks > Hanjun > > [0]: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=528871b456026e6127d95b1b2bd8e3a003dc1614 > _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel