[PATCH] deterine xapic using apic version

[Shaohua Li]

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@xxxxxxxxx>
---

 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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