From: Siddha, Suresh B Date: Wed, 17 Oct 2007 16:04:33 +0000 (+0200) Subject: i386: fix 4 bit apicid assumption of mach-default X-Git-Tag: v2.6.24-rc1~476^2~105 X-Git-Url: http://pilppa.com/gitweb/?a=commitdiff_plain;h=58d5fa7a6a6fc4754d295d0999b284edd67c8620;p=linux-2.6-omap-h63xx.git i386: fix 4 bit apicid assumption of mach-default Fix get_apic_id() in mach-default, so that it uses 8 bits incase of xAPIC case and 4 bits for legacy APIC case. This fixes the i386 kernel assumption that apic id is less than 16 for xAPIC platforms with 8 cpus or less and makes the kernel boot on such platforms. [ tglx: arch/x86 adaptation ] Signed-off-by: Suresh Siddha Signed-off-by: Andi Kleen Cc: Andi Kleen Cc: Andrew Morton Signed-off-by: Andrew Morton Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/include/asm-x86/mach-default/mach_apicdef.h b/include/asm-x86/mach-default/mach_apicdef.h index 7bcb350c3ee..ae984131909 100644 --- a/include/asm-x86/mach-default/mach_apicdef.h +++ b/include/asm-x86/mach-default/mach_apicdef.h @@ -1,11 +1,17 @@ #ifndef __ASM_MACH_APICDEF_H #define __ASM_MACH_APICDEF_H +#include + #define APIC_ID_MASK (0xF<<24) static inline unsigned get_apic_id(unsigned long x) { - return (((x)>>24)&0xF); + unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR)); + if (APIC_XAPIC(ver)) + return (((x)>>24)&0xFF); + else + return (((x)>>24)&0xF); } #define GET_APIC_ID(x) get_apic_id(x)