From b675f11127291cdb6a090ece289e4f9a0b1d609e Mon Sep 17 00:00:00 2001 From: Glauber de Oliveira Costa Date: Wed, 19 Mar 2008 14:25:14 -0300 Subject: [PATCH] x86: isolate logic to disable smp Put it in a disable_smp() function, as x86_64 does Signed-off-by: Glauber Costa Signed-off-by: Ingo Molnar --- arch/x86/kernel/smpboot_32.c | 32 ++++++++++++++++---------------- 1 file changed, 16 insertions(+), 16 deletions(-) diff --git a/arch/x86/kernel/smpboot_32.c b/arch/x86/kernel/smpboot_32.c index b44a743d0e..8144aa3a1e 100644 --- a/arch/x86/kernel/smpboot_32.c +++ b/arch/x86/kernel/smpboot_32.c @@ -742,6 +742,15 @@ void *xquad_portio; EXPORT_SYMBOL(xquad_portio); #endif +static void __init disable_smp(void) +{ + smpboot_clear_io_apic_irqs(); + phys_cpu_present_map = physid_mask_of_physid(0); + map_cpu_to_logical_apicid(); + cpu_set(0, per_cpu(cpu_sibling_map, 0)); + cpu_set(0, per_cpu(cpu_core_map, 0)); +} + static int __init smp_sanity_check(unsigned max_cpus) { /* @@ -750,14 +759,10 @@ static int __init smp_sanity_check(unsigned max_cpus) */ if (!smp_found_config && !acpi_lapic) { printk(KERN_NOTICE "SMP motherboard not detected.\n"); - smpboot_clear_io_apic_irqs(); - phys_cpu_present_map = physid_mask_of_physid(0); + disable_smp(); if (APIC_init_uniprocessor()) printk(KERN_NOTICE "Local APIC not detected." " Using dummy APIC emulation.\n"); - map_cpu_to_logical_apicid(); - cpu_set(0, per_cpu(cpu_sibling_map, 0)); - cpu_set(0, per_cpu(cpu_core_map, 0)); return -1; } @@ -779,11 +784,6 @@ static int __init smp_sanity_check(unsigned max_cpus) printk(KERN_ERR "BIOS bug, local APIC #%d not detected!...\n", boot_cpu_physical_apicid); printk(KERN_ERR "... forcing use of dummy APIC emulation. (tell your hw vendor)\n"); - smpboot_clear_io_apic_irqs(); - phys_cpu_present_map = physid_mask_of_physid(0); - map_cpu_to_logical_apicid(); - cpu_set(0, per_cpu(cpu_sibling_map, 0)); - cpu_set(0, per_cpu(cpu_core_map, 0)); return -1; } @@ -801,11 +801,6 @@ static int __init smp_sanity_check(unsigned max_cpus) connect_bsp_APIC(); setup_local_APIC(); } - smpboot_clear_io_apic_irqs(); - phys_cpu_present_map = physid_mask_of_physid(0); - map_cpu_to_logical_apicid(); - cpu_set(0, per_cpu(cpu_sibling_map, 0)); - cpu_set(0, per_cpu(cpu_core_map, 0)); return -1; } return 0; @@ -835,7 +830,12 @@ static void __init smp_boot_cpus(unsigned int max_cpus) set_cpu_sibling_map(0); - smp_sanity_check(max_cpus); + if (smp_sanity_check(max_cpus) < 0) { + printk(KERN_INFO "SMP disabled\n"); + disable_smp(); + return; + } + connect_bsp_APIC(); setup_local_APIC(); map_cpu_to_logical_apicid(); -- 2.39.5