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[PATCH] Do not enforce unique IO_APIC_ID check for xAPIC systems (i386)

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This patch is per Andi's request to remove NO_IOAPIC_CHECK from genapic and
use heuristics to prevent unique I/O APIC ID check for systems that don't
need it.  The patch disables unique I/O APIC ID check for Xeon-based and
other platforms that don't use serial APIC bus for interrupt delivery.
Andi stated that AMD systems don't need unique IO_APIC_IDs either.

Signed-off-by: Natalie Protasevich <Natalie.Protasevich@unisys.com>
Cc: Andi Kleen <ak@muc.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Natalie Protasevich
2005-06-23 00:08:22 -07:00
committed by Linus Torvalds
parent 7c1def1652
commit ca05fea6db
10 changed files with 10 additions and 19 deletions
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include/asm-i386/mach-summit/mach_apic.h
-2
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@@ -7,8 +7,6 @@
#define esr_disable (1)
#define NO_BALANCE_IRQ (0)
#define NO_IOAPIC_CHECK (1) /* Don't check I/O APIC ID for xAPIC */
/* In clustered mode, the high nibble of APIC ID is a cluster number.
* The low nibble is a 4-bit bitmap. */
#define XAPIC_DEST_CPUS_SHIFT 4