From 3e730dad3b6da42d21c05007445ca1bfd219d7ce Mon Sep 17 00:00:00 2001 From: Dou Liyang Date: Wed, 13 Sep 2017 17:12:48 +0800 Subject: x86/apic: Unify interrupt mode setup for SMP-capable system On a SMP-capable system, the kernel enables and sets up the APIC interrupt delivery mode in native_smp_prepare_cpus(). The decision how to setup the APIC is intermingled with the decision of setting up SMP or not. Split the initialization of the APIC interrupt mode independent from other decisions and have a separate apic_intr_mode_init() function for it. The invocation time stays the same for now. Signed-off-by: Dou Liyang Signed-off-by: Thomas Gleixner Cc: yinghai@kernel.org Cc: bhe@redhat.com Link: https://lkml.kernel.org/r/1505293975-26005-6-git-send-email-douly.fnst@cn.fujitsu.com --- arch/x86/kernel/smpboot.c | 14 ++------------ 1 file changed, 2 insertions(+), 12 deletions(-) (limited to 'arch/x86/kernel/smpboot.c') diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c index d367ddbec5d0..d0a1d28c23e8 100644 --- a/arch/x86/kernel/smpboot.c +++ b/arch/x86/kernel/smpboot.c @@ -1336,18 +1336,17 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) set_cpu_sibling_map(0); + apic_intr_mode_init(); + switch (smp_sanity_check(max_cpus)) { case SMP_NO_CONFIG: disable_smp(); - if (APIC_init_uniprocessor()) - pr_notice("Local APIC not detected. Using dummy APIC emulation.\n"); return; case SMP_NO_APIC: disable_smp(); return; case SMP_FORCE_UP: disable_smp(); - apic_bsp_setup(false); /* Setup local timer */ x86_init.timers.setup_percpu_clockev(); return; @@ -1355,15 +1354,6 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus) break; } - if (read_apic_id() != boot_cpu_physical_apicid) { - panic("Boot APIC ID in local APIC unexpected (%d vs %d)", - read_apic_id(), boot_cpu_physical_apicid); - /* Or can we switch back to PIC here? */ - } - - default_setup_apic_routing(); - apic_bsp_setup(false); - /* Setup local timer */ x86_init.timers.setup_percpu_clockev(); -- cgit