58d5fa7a6a
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 <suresh.b.siddha@intel.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: Andi Kleen <ak@suse.de> Cc: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
20 lines
363 B
C
20 lines
363 B
C
#ifndef __ASM_MACH_APICDEF_H
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#define __ASM_MACH_APICDEF_H
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#include <asm/apic.h>
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#define APIC_ID_MASK (0xF<<24)
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static inline unsigned get_apic_id(unsigned long x)
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{
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unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
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if (APIC_XAPIC(ver))
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return (((x)>>24)&0xFF);
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else
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return (((x)>>24)&0xF);
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}
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#define GET_APIC_ID(x) get_apic_id(x)
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#endif
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