From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752146Ab1AWNiS (ORCPT ); Sun, 23 Jan 2011 08:38:18 -0500 Received: from mail-fx0-f46.google.com ([209.85.161.46]:42549 "EHLO mail-fx0-f46.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751778Ab1AWNiH (ORCPT ); Sun, 23 Jan 2011 08:38:07 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=sender:from:to:cc:subject:date:message-id:x-mailer:in-reply-to :references; b=eCVryx+Gwn97OAwb5fLflOrvR9ffCKEgiYk+3D8631WOLCI/zLgiIlufcBV/PwHqII BOvpwANxfSyIZF94iLrGi2NIMtlJV8l8fETC6B5qqMWCD/FlDvDmbXchf28lTko9GjzT DAfdBqb+CKOV3MSh14ybhGwHyAbngd8vIh0xs= From: Tejun Heo To: linux-kernel@vger.kernel.org, hpa@zytor.com Cc: mingo@redhat.com, tglx@linutronix.de, x86@kernel.org, eric.dumazet@gmail.com, yinghai@kernel.org, brgerst@gmail.com, gorcunov@gmail.com, penberg@kernel.org, shaohui.zheng@intel.com, rientjes@google.com, Tejun Heo Subject: [PATCH 05/16] x86: Always use x86_cpu_to_logical_apicid for cpu -> logical apic id Date: Sun, 23 Jan 2011 14:37:31 +0100 Message-Id: <1295789862-25482-6-git-send-email-tj@kernel.org> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1295789862-25482-1-git-send-email-tj@kernel.org> References: <1295789862-25482-1-git-send-email-tj@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Currently, cpu -> logical apic id translation is done by apic->cpu_to_logical_apicid() callback which may or may not use x86_cpu_to_logical_apicid. This is unnecessary as it should always equal logical_smp_processor_id() which is known early during CPU bring up. Initialize x86_cpu_to_logical_apicid after apic->init_apic_ldr() in setup_local_APIC() and always use x86_cpu_to_logical_apicid for cpu -> logical apic id mapping. Signed-off-by: Tejun Heo --- arch/x86/kernel/apic/apic.c | 8 ++++++++ arch/x86/kernel/apic/ipi.c | 8 ++++---- arch/x86/kernel/smpboot.c | 7 +++---- 3 files changed, 15 insertions(+), 8 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 126d5a3..ae08246 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -1248,6 +1248,14 @@ void __cpuinit setup_local_APIC(void) */ apic->init_apic_ldr(); +#ifdef CONFIG_X86_32 + /* + * APIC LDR is initialized. Fetch and store logical_apic_id. + */ + early_per_cpu(x86_cpu_to_logical_apicid, cpu) = + logical_smp_processor_id(); +#endif + /* * Set Task Priority to 'accept all'. We never change this * later on. diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c index 5037736..cce91bf 100644 --- a/arch/x86/kernel/apic/ipi.c +++ b/arch/x86/kernel/apic/ipi.c @@ -73,8 +73,8 @@ void default_send_IPI_mask_sequence_logical(const struct cpumask *mask, local_irq_save(flags); for_each_cpu(query_cpu, mask) __default_send_IPI_dest_field( - apic->cpu_to_logical_apicid(query_cpu), vector, - apic->dest_logical); + early_per_cpu(x86_cpu_to_logical_apicid, query_cpu), + vector, apic->dest_logical); local_irq_restore(flags); } @@ -92,8 +92,8 @@ void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask, if (query_cpu == this_cpu) continue; __default_send_IPI_dest_field( - apic->cpu_to_logical_apicid(query_cpu), vector, - apic->dest_logical); + early_per_cpu(x86_cpu_to_logical_apicid, query_cpu), + vector, apic->dest_logical); } local_irq_restore(flags); } diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index 7ba50e8..4d6a280 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -168,19 +168,18 @@ static void unmap_cpu_to_node(int cpu) static void map_cpu_to_logical_apicid(void) { int cpu = smp_processor_id(); - int apicid = logical_smp_processor_id(); - int node = apic->apicid_to_node(apicid); + int logical_apicid = early_per_cpu(x86_cpu_to_logical_apicid, cpu); + int node; + node = apic->apicid_to_node(logical_apicid); if (!node_online(node)) node = first_online_node; - early_per_cpu(x86_cpu_to_logical_apicid, cpu) = apicid; map_cpu_to_node(cpu, node); } void numa_remove_cpu(int cpu) { - early_per_cpu(x86_cpu_to_logical_apicid, cpu) = BAD_APICID; unmap_cpu_to_node(cpu); } #else -- 1.7.1