From patchwork Thu Aug 1 03:46:32 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeremy Linton X-Patchwork-Id: 11070153 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8E11B13B1 for ; Thu, 1 Aug 2019 03:46:43 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7FE4C2842B for ; Thu, 1 Aug 2019 03:46:43 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 727B928438; Thu, 1 Aug 2019 03:46:43 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0C1E72842B for ; Thu, 1 Aug 2019 03:46:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728974AbfHADqm (ORCPT ); Wed, 31 Jul 2019 23:46:42 -0400 Received: from foss.arm.com ([217.140.110.172]:57772 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727948AbfHADql (ORCPT ); Wed, 31 Jul 2019 23:46:41 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4E5A2344; Wed, 31 Jul 2019 20:46:41 -0700 (PDT) Received: from mammon-tx2.austin.arm.com (mammon-tx2.austin.arm.com [10.118.30.64]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 3D7BA3F575; Wed, 31 Jul 2019 20:46:41 -0700 (PDT) From: Jeremy Linton To: linux-arm-kernel@lists.infradead.org Cc: linux-acpi@vger.kernel.org, catalin.marinas@arm.com, will@kernel.org, rjw@rjwysocki.net, lenb@kernel.org, lorenzo.pieralisi@arm.com, sudeep.holla@arm.com, Jeremy Linton Subject: [PATCH v4 0/2] arm64/PPTT ACPI 6.3 thread flag support Date: Wed, 31 Jul 2019 22:46:32 -0500 Message-Id: <20190801034634.26913-1-jeremy.linton@arm.com> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP ACPI 6.3 adds a flag to the CPU node to indicate whether the given CPU is a thread. Add a function to return that information for a given linux logical CPU and then utilize it while building the arm64 topology. v3->v4: Remove table revision cache as this code path is only called during boot and there aren't any indications that it presents a perf issue. Rebase to 5.3 v2->v3: Clarify and tweak the return from check_acpi_cpu_flag() Cache the PPTT table revision to avoid repeat acpi_table_get/put calls in the case of missing or old PPTT tables. v1->v2: Return ENOENT instead on ENONET. Jeremy Linton (2): ACPI/PPTT: Add support for ACPI 6.3 thread flag arm64: topology: Use PPTT to determine if PE is a thread arch/arm64/kernel/topology.c | 8 ++++-- drivers/acpi/pptt.c | 54 +++++++++++++++++++++++++++++++++++- include/linux/acpi.h | 5 ++++ 3 files changed, 63 insertions(+), 4 deletions(-)