From patchwork Thu Oct 20 21:59:57 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tim Chen X-Patchwork-Id: 9387677 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 BDFBA607D0 for ; Thu, 20 Oct 2016 22:02:42 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 9D9BC29CAF for ; Thu, 20 Oct 2016 22:02:42 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 926E329CB5; Thu, 20 Oct 2016 22:02:42 +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 4146E29CAF for ; Thu, 20 Oct 2016 22:02:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757220AbcJTWBB (ORCPT ); Thu, 20 Oct 2016 18:01:01 -0400 Received: from mga03.intel.com ([134.134.136.65]:58643 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754186AbcJTWA7 (ORCPT ); Thu, 20 Oct 2016 18:00:59 -0400 Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by orsmga103.jf.intel.com with ESMTP; 20 Oct 2016 15:00:53 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.31,521,1473145200"; d="scan'208";a="21915287" Received: from skl-02.jf.intel.com ([10.23.236.208]) by fmsmga005.fm.intel.com with ESMTP; 20 Oct 2016 15:00:53 -0700 From: Tim Chen To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com, bp@suse.de Cc: Tim Chen , x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, peterz@infradead.org, jolsa@redhat.com, Srinivas Pandruvada Subject: [PATCH v6 3/9] x86/topology: Define x86's arch_update_cpu_topology Date: Thu, 20 Oct 2016 14:59:57 -0700 Message-Id: <64b30e9319d3ad00a8e67f6c68ff927b8112f753.1477000078.git.tim.c.chen@linux.intel.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The scheduler calls arch_update_cpu_topology() to check whether the scheduler domains have to be rebuilt. So far x86 has no requirement for this, but the upcoming ITMT support makes this necessary. Request the rebuild when the x86 internal update flag is set. Suggested-by: Morten Rasmussen Signed-off-by: Tim Chen Signed-off-by: Srinivas Pandruvada --- arch/x86/include/asm/topology.h | 1 + arch/x86/kernel/smpboot.c | 11 +++++++++++ 2 files changed, 12 insertions(+) diff --git a/arch/x86/include/asm/topology.h b/arch/x86/include/asm/topology.h index 3e95dfc..323f61f 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -149,4 +149,5 @@ 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; #endif /* _ASM_X86_TOPOLOGY_H */ diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 4234e52..ebd2655 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -109,6 +109,17 @@ static bool logical_packages_frozen __read_mostly; /* Maximum number of SMT threads on any online core */ int __max_smt_threads __read_mostly; +/* Flag to indicate if a complete sched domain rebuild is required */ +bool x86_topology_update; + +int arch_update_cpu_topology(void) +{ + int retval = x86_topology_update; + + x86_topology_update = false; + return retval; +} + static inline void smpboot_setup_warm_reset_vector(unsigned long start_eip) { unsigned long flags;