From mboxrd@z Thu Jan 1 00:00:00 1970 From: Srinivas Pandruvada Subject: [PATCH v3 4/8] sched, x86: use arch_update_cpu_topology to indicate x86 need sched domain rebuild Date: Thu, 8 Sep 2016 15:26:51 -0700 Message-ID: <1473373615-51427-5-git-send-email-srinivas.pandruvada@linux.intel.com> References: <1473373615-51427-1-git-send-email-srinivas.pandruvada@linux.intel.com> Return-path: In-Reply-To: <1473373615-51427-1-git-send-email-srinivas.pandruvada@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com, bp@suse.de Cc: x86@kernel.org, linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, peterz@infradead.org, tim.c.chen@linux.intel.com, Srinivas Pandruvada List-Id: linux-pm@vger.kernel.org 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) { -- 2.7.4