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=-2.4 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,T_DKIMWL_WL_HIGH, USER_AGENT_MUTT 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 AC722C04A6B for ; Wed, 8 May 2019 16:45:22 +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 7FF4721726 for ; Wed, 8 May 2019 16:45:22 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="OpLQjpuF" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 7FF4721726 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-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:In-Reply-To:MIME-Version:References: Message-ID:Subject:To:From:Date:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=U5Z4hQTDvKnFdPsa6UrX51wn9E9zxDSVo5gghwc2Xh0=; b=OpLQjpuFB9QXUP sjMUEOevEmwSJPfMMVg34iQsgn1ajR8AwkgkG77Edt1Sg7xOUCoczGFQPRaq+2LvHV4xzLLbh3k7m bdnLPAyNRxXDALWmwnwQ1QFMacGVdyXA211+pb/mQsuIXBPZf71OKw1tmG7a7oWAzSwEq9nspMk3T J2wPdOVLUqGEr8W5ufxbK0nEKthcKlyVJAYQGg/fC9HPuCeN+MCJUSMind7Rc8lfnc0PEvXzVlcUg ofoUXjebEGdbBsCiOryvT5Fg63PcCbG/+46EG5P6ue9z95sJqq38HP7/ySSV0Pj1IoJhbDPyfbrJT 1N2Weklyzvx5nruxaKgQ==; 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 1hOPh1-0007zS-Ae; Wed, 08 May 2019 16:45:19 +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 1hOPgy-0007z6-ME for linux-arm-kernel@lists.infradead.org; Wed, 08 May 2019 16:45:18 +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 8CE71374; Wed, 8 May 2019 09:45:14 -0700 (PDT) Received: from e107155-lin (e107155-lin.cambridge.arm.com [10.1.196.42]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 55D523F238; Wed, 8 May 2019 09:45:12 -0700 (PDT) Date: Wed, 8 May 2019 17:45:06 +0100 From: Sudeep Holla To: Hanjun Guo Subject: Re: [PATCH v3 0/5] arm64: SPE ACPI enablement Message-ID: <20190508164506.GA21553@e107155-lin> References: <20190503232407.37195-1-jeremy.linton@arm.com> <5eaa1607-4bf0-a320-e9cf-2d51eca912c6@huawei.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <5eaa1607-4bf0-a320-e9cf-2d51eca912c6@huawei.com> User-Agent: Mutt/1.9.4 (2018-02-28) X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190508_094516_733714_FDE4C03E X-CRM114-Status: GOOD ( 22.88 ) 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, john.garry@huawei.com, rjw@rjwysocki.net, linuxarm@huawei.com, Jeremy Linton , Sudeep Holla , linux-acpi@vger.kernel.org, catalin.marinas@arm.com, linux-arm-kernel@lists.infradead.org, lenb@kernel.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Sat, May 04, 2019 at 07:06:19PM +0800, 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. > > 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 for pointing this out. I had last tested SPE only with v5.0 and missed completely to check on v5.1. FWIW, I can reproduce this issue on v5.1 -- Regards, Sudeep _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel