Messages in this thread Patch in this message | | | Subject | [PATCH] deterine xapic using apic version | From | Shaohua Li <> | Date | Tue, 07 Mar 2006 09:39:49 +0800 |
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Checking APIC version instead of CPU family to determine XAPIC. Family 6 CPU could have xapic as well.
Signed-off-by: Shaohua Li<shaohua.li@intel.com> ---
linux-2.6.16-rc5-root/arch/i386/kernel/io_apic.c | 3 ++- linux-2.6.16-rc5-root/arch/i386/kernel/mpparse.c | 3 ++- 2 files changed, 4 insertions(+), 2 deletions(-)
diff -puN arch/i386/kernel/io_apic.c~xapic_id arch/i386/kernel/io_apic.c --- linux-2.6.16-rc5/arch/i386/kernel/io_apic.c~xapic_id 2006-03-02 10:46:36.000000000 +0800 +++ linux-2.6.16-rc5-root/arch/i386/kernel/io_apic.c 2006-03-05 07:26:48.000000000 +0800 @@ -1759,7 +1759,8 @@ static void __init setup_ioapic_ids_from * Don't check I/O APIC IDs for xAPIC systems. They have * no meaning without the serial APIC bus. */ - if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL && boot_cpu_data.x86 < 15)) + if (!(boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) + || APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) return; /* * This is broken; anything with a real cpu count has to diff -puN arch/i386/kernel/mpparse.c~xapic_id arch/i386/kernel/mpparse.c --- linux-2.6.16-rc5/arch/i386/kernel/mpparse.c~xapic_id 2006-03-05 07:23:25.000000000 +0800 +++ linux-2.6.16-rc5-root/arch/i386/kernel/mpparse.c 2006-03-05 07:27:09.000000000 +0800 @@ -935,7 +935,8 @@ void __init mp_register_ioapic ( mp_ioapics[idx].mpc_apicaddr = address; set_fixmap_nocache(FIX_IO_APIC_BASE_0 + idx, address); - if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) && (boot_cpu_data.x86 < 15)) + if ((boot_cpu_data.x86_vendor == X86_VENDOR_INTEL) + && !APIC_XAPIC(apic_version[boot_cpu_physical_apicid])) tmpid = io_apic_get_unique_id(idx, id); else tmpid = id; _
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