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=-2.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_GIT 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 44AA2C43382 for ; Fri, 28 Sep 2018 02:58:17 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D9145215E4 for ; Fri, 28 Sep 2018 02:58:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="bCEaXxQD"; dkim=fail reason="key not found in DNS" (0-bit key) header.d=codeaurora.org header.i=@codeaurora.org header.b="bCEaXxQD" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D9145215E4 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728062AbeI1JTn (ORCPT ); Fri, 28 Sep 2018 05:19:43 -0400 Received: from smtp.codeaurora.org ([198.145.29.96]:41682 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726091AbeI1JTm (ORCPT ); Fri, 28 Sep 2018 05:19:42 -0400 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 4DE2F60818; Fri, 28 Sep 2018 02:58:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1538103493; bh=nnqp1MxbJFS5x6CM8RUKq+t4jG7kMVyAe7N7S3OT/1U=; h=From:To:Cc:Subject:Date:From; b=bCEaXxQD8hOfnYLZQyOzV0gFbXSkjKxZZzobJrVMsObmNpSxW2HB7KmKhdfIJJamY Gz4nSVNCOj9DE8IQK8xq8w2rZuOqkUSAnEEbIIg3W9S9ASINoo4+4mOOBXNAjVMQPZ qtHMCA6uXCbg3GlAj6LABOu1qx05N5/5xn6R7MtI= Received: from jhugo-perf-lnx.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: jhugo@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 3C00B600C1; Fri, 28 Sep 2018 02:58:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1538103493; bh=nnqp1MxbJFS5x6CM8RUKq+t4jG7kMVyAe7N7S3OT/1U=; h=From:To:Cc:Subject:Date:From; b=bCEaXxQD8hOfnYLZQyOzV0gFbXSkjKxZZzobJrVMsObmNpSxW2HB7KmKhdfIJJamY Gz4nSVNCOj9DE8IQK8xq8w2rZuOqkUSAnEEbIIg3W9S9ASINoo4+4mOOBXNAjVMQPZ qtHMCA6uXCbg3GlAj6LABOu1qx05N5/5xn6R7MtI= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 3C00B600C1 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=jhugo@codeaurora.org From: Jeffrey Hugo To: sudeep.holla@arm.com, gregkh@linuxfoundation.org, rjw@rjwysocki.net, linux-acpi@vger.kernel.org, jeremy.linton@arm.com Cc: linux-kernel@vger.kernel.org, vkilari@codeaurora.org, Jeffrey Hugo Subject: [PATCH v3 0/2] PPTT handle Handle architecturally unknown cache types Date: Thu, 27 Sep 2018 20:57:55 -0600 Message-Id: <1538103477-15513-1-git-send-email-jhugo@codeaurora.org> X-Mailer: git-send-email 1.9.1 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The ARM Architecture Reference Manual allows for caches to be "invisible" and thus not specified in the system registers under some scenarios such as if the cache cannot be managed by set/way operations. However, such caches may be specified in the ACPI PPTT table for workload performance/scheduling optimizations. Currently such caches can cause an error in lscpu - lscpu: cannot open /sys/devices/system/cpu/cpu0/cache/index3/type: No such file or directory and result in no output, providing a poor user experience. lstopo is also affected as such caches are not included in the output. Address these issues by attempting to be a little more discerning about when cache information is provided to userspace, and also utilize all sources for cache information when possible. [v3] -removed valid flag in PPTT -Added Jeremy Linton's reviewed-by [v2] -Updated cacheinfo per Sudeep's suggestion -Integrated the PPTT fix into existing PPTT code per Sudeep's suggestion Jeffrey Hugo (2): drivers: base: cacheinfo: Do not populate sysfs for unknown cache types ACPI/PPTT: Handle architecturally unknown cache types drivers/acpi/pptt.c | 15 +++++++++++---- drivers/base/cacheinfo.c | 2 ++ 2 files changed, 13 insertions(+), 4 deletions(-) -- Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.