From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S941225AbcKXTwT (ORCPT ); Thu, 24 Nov 2016 14:52:19 -0500 Received: from terminus.zytor.com ([198.137.202.10]:46666 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935677AbcKXTwR (ORCPT ); Thu, 24 Nov 2016 14:52:17 -0500 Date: Thu, 24 Nov 2016 11:52:02 -0800 From: tip-bot for Tim Chen Message-ID: Cc: hpa@zytor.com, linux-kernel@vger.kernel.org, mingo@kernel.org, morten.rasmussen@arm.com, tim.c.chen@linux.intel.com, tglx@linutronix.de, srinivas.pandruvada@linux.intel.com Reply-To: mingo@kernel.org, hpa@zytor.com, linux-kernel@vger.kernel.org, morten.rasmussen@arm.com, tim.c.chen@linux.intel.com, tglx@linutronix.de, srinivas.pandruvada@linux.intel.com In-Reply-To: References: To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/core] x86/topology: Define x86's arch_update_cpu_topology Git-Commit-ID: 7d25127cef44924f1013d119ba385095ca4b4a83 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: 7d25127cef44924f1013d119ba385095ca4b4a83 Gitweb: http://git.kernel.org/tip/7d25127cef44924f1013d119ba385095ca4b4a83 Author: Tim Chen AuthorDate: Tue, 22 Nov 2016 12:23:54 -0800 Committer: Thomas Gleixner CommitDate: Thu, 24 Nov 2016 20:44:19 +0100 x86/topology: Define x86's arch_update_cpu_topology 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 Cc: linux-pm@vger.kernel.org Cc: peterz@infradead.org Cc: jolsa@redhat.com Cc: rjw@rjwysocki.net Cc: linux-acpi@vger.kernel.org Cc: Srinivas Pandruvada Cc: bp@suse.de Link: http://lkml.kernel.org/r/bfbf5591276ec60b2af2da798adc1060df1e2a5f.1479844244.git.tim.c.chen@linux.intel.com Signed-off-by: Thomas Gleixner --- 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 cf75871..a5ca88a 100644 --- a/arch/x86/include/asm/topology.h +++ b/arch/x86/include/asm/topology.h @@ -146,4 +146,5 @@ 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 42f5eb7..ac61ee7 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;