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x86/apic: Split local APIC timer setup from the APIC setup 

apic_bsp_setup() sets 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
and has nothing to do with interrupt delivery mode setup.

Split local APIC timer setup from the APIC setup, keep it in the original
position for SMP and UP kernel for now.

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: yinghai@kernel.org
Cc: bhe@redhat.com
Link: https://lkml.kernel.org/r/1505293975-26005-4-git-send-email-douly.fnst@cn.fujitsu.com
This commit is contained in:
Dou Liyang 2017-09-13 17:12:46 +08:00 committed by Thomas Gleixner
parent 4b1669e8d1
commit a2510d156e
2 changed files with 7 additions and 2 deletions
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4
arch/x86/kernel/apic/apic.c
View File

@ -2397,8 +2397,6 @@ 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;
}
@ -2438,6 +2436,8 @@ 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;
}

5
arch/x86/kernel/smpboot.c
View File

@ -1340,6 +1340,8 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
case SMP_FORCE_UP:
disable_smp();
apic_bsp_setup(false);
/* Setup local timer */
x86_init.timers.setup_percpu_clockev();
return;
case SMP_OK:
break;
@ -1354,6 +1356,9 @@ 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));