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for [Bug #10613] BIOS bug, APIC version is 0 for CPU#0! http://bugzilla.kernel.org/show_bug.cgi?id=10613 BIOS bug, APIC version is 0 for CPU#0! fixing up to 0x10. (tell your hw vendor) Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Index: linux-2.6/arch/x86/kernel/acpi/boot.c =================================================================== --- linux-2.6.orig/arch/x86/kernel/acpi/boot.c +++ linux-2.6/arch/x86/kernel/acpi/boot.c @@ -242,12 +242,17 @@ static int __init acpi_parse_madt(struct static void __cpuinit acpi_register_lapic(int id, u8 enabled) { + unsigned int ver = 0; + if (!enabled) { ++disabled_cpus; return; } - generic_processor_info(id, 0); + if (boot_cpu_physical_apicid != -1U) + ver = apic_version[boot_cpu_physical_apicid]; + + generic_processor_info(id, ver); } static int __init @@ -763,8 +768,11 @@ static void __init acpi_register_lapic_a mp_lapic_addr = address; set_fixmap_nocache(FIX_APIC_BASE, address); - if (boot_cpu_physical_apicid == -1U) + if (boot_cpu_physical_apicid == -1U) { + unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR)); boot_cpu_physical_apicid = GET_APIC_ID(read_apic_id()); + apic_version[boot_cpu_physical_apicid] = ver; + } } static int __init early_acpi_parse_madt_lapic_addr_ovr(void) | ||||||||||||
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