Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761543AbdDSJGQ (ORCPT ); Wed, 19 Apr 2017 05:06:16 -0400 Received: from cn.fujitsu.com ([59.151.112.132]:17946 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1761498AbdDSJGH (ORCPT ); Wed, 19 Apr 2017 05:06:07 -0400 X-IronPort-AV: E=Sophos;i="5.22,518,1449504000"; d="scan'208";a="17913929" From: Dou Liyang To: , CC: , , , , , , Dou Liyang Subject: [RFC PATCH v2 06/12] x86/apic: Split local APIC timer setup from the APIC setup Date: Wed, 19 Apr 2017 17:05:20 +0800 Message-ID: <7ac9a330d082455ecf2c937dd7c4f179131dcc0c.1492589715.git.douly.fnst@cn.fujitsu.com> X-Mailer: git-send-email 2.5.5 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.167.226.106] X-yoursite-MailScanner-ID: DC7A34670219.A261D X-yoursite-MailScanner: Found to be clean X-yoursite-MailScanner-From: douly.fnst@cn.fujitsu.com Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1717 Lines: 58 The apic_bsp_setup() set up the local APIC, I/O APIC and APIC timer. The local APIC and I/O APIC setup belongs to interrupt delivery mode setup. Setting up the local APIC timer for booting CPU is another job. Unifying the interrupt delivery mode need setting the apic_bsp_setup() in advance of calibrating TSC. but the APIC timer setup cannot be run there. Split local APIC timer setup from the APIC setup, keep it in the original position for SMP and UP kernel. Signed-off-by: Dou Liyang --- arch/x86/kernel/apic/apic.c | 4 ++-- arch/x86/kernel/smpboot.c | 4 ++++ 2 files changed, 6 insertions(+), 2 deletions(-) diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c index 8ac4f58..903fd8f 100644 --- a/arch/x86/kernel/apic/apic.c +++ b/arch/x86/kernel/apic/apic.c @@ -2349,8 +2349,6 @@ int __init apic_bsp_setup(bool upmode) end_local_APIC_setup(); irq_remap_enable_fault_handling(); setup_IO_APIC(); - /* Setup local timer */ - x86_init.timers.setup_percpu_clockev(); return id; } @@ -2390,6 +2388,8 @@ int __init APIC_init_uniprocessor(void) default_setup_apic_routing(); apic_bsp_setup(true); + /* Setup local timer */ + x86_init.timers.setup_percpu_clockev(); return 0; } diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index bd1f1ad..db91a40 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1347,6 +1347,10 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) default_setup_apic_routing(); cpu0_logical_apicid = apic_bsp_setup(false); + + /* Setup local timer */ + x86_init.timers.setup_percpu_clockev(); + pr_info("CPU0: "); print_cpu_info(&cpu_data(0)); -- 2.5.5