From patchwork Thu Sep 1 20:33:40 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: srinivas pandruvada X-Patchwork-Id: 9309583 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 60D9A60756 for ; Thu, 1 Sep 2016 21:09:02 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3F51F29543 for ; Thu, 1 Sep 2016 21:09:02 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 342C029548; Thu, 1 Sep 2016 21:09:02 +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=-6.9 required=2.0 tests=BAYES_00,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 60FFC29543 for ; Thu, 1 Sep 2016 21:09:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757053AbcIAVIx (ORCPT ); Thu, 1 Sep 2016 17:08:53 -0400 Received: from mga05.intel.com ([192.55.52.43]:25286 "EHLO mga05.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757042AbcIAVIu (ORCPT ); Thu, 1 Sep 2016 17:08:50 -0400 Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga105.fm.intel.com with ESMTP; 01 Sep 2016 13:33:59 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.30,268,1470726000"; d="scan'208";a="3734173" Received: from spandruv-desk.jf.intel.com ([10.54.75.13]) by fmsmga006.fm.intel.com with ESMTP; 01 Sep 2016 13:33:48 -0700 From: Srinivas Pandruvada To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com, bp@suse.de, peterz@infradead.org Cc: x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, tim.c.chen@linux.intel.com, Srinivas Pandruvada Subject: [PATCH v2 4/8] sched, x86: use arch_update_cpu_topology to indicate x86 need sched domain rebuild Date: Thu, 1 Sep 2016 13:33:40 -0700 Message-Id: <1472762024-88771-5-git-send-email-srinivas.pandruvada@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1472762024-88771-1-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1472762024-88771-1-git-send-email-srinivas.pandruvada@linux.intel.com> 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 From: Tim Chen Provides x86 with arch_update_cpu_topology function. This function allows us to indicate that a condition is detected that the sched domain of x86 needs a complete rebuild. This is done by setting the x86_topology_update flag. Signed-off-by: Tim Chen Signed-off-by: Srinivas Pandruvada --- arch/x86/include/asm/topology.h | 2 ++ arch/x86/kernel/smpboot.c | 11 +++++++++++ 2 files changed, 13 insertions(+) diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 0bcf3b7..8d6df77 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -147,6 +147,8 @@ struct pci_bus; int x86_pci_root_bus_node(int bus); void x86_pci_root_bus_resources(int bus, struct list_head *resources); +extern bool x86_topology_update; + #ifdef CONFIG_SCHED_ITMT extern unsigned int __read_mostly sysctl_sched_itmt_enabled; #endif /* CONFIG_SCHED_ITMT */ diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 292df31..737b9edf 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -110,6 +110,17 @@ static bool logical_packages_frozen __read_mostly; int __max_smt_threads __read_mostly; unsigned int __read_mostly sysctl_sched_itmt_enabled; +/* Flag to indicate if a complete sched domain rebuild is required */ +bool x86_topology_update; + +int arch_update_cpu_topology(void) +{ + if (x86_topology_update) { + x86_topology_update = false; + return 1; + } else + return 0; +} static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip) {