Messages in this thread Patch in this message | | | Subject | [patch 1/1] Added NO_IOAPIC_CHECK in io_apic_get_unique_id() for ACPI boot | From | Natalie.Protasevich@unisys ... | Date | Sun, 01 May 2005 03:54:33 -0700 |
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This patch allows xAPIC systems that don't have serial bus for interrupts delivery to by-pass the check on uniquness of IO-APIC IDs. Some of ES7000's panic failing this unnecessary check. The genapic mechanism has NO_IOAPIC_CHECK flag, which is defined in each subarch. The MP boot utilizes it, but the ACPI boot is missing it.
Signed-off by: Natalie Protasevich <Natalie.Protasevich@unisys.com>
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diff -puN arch/i386/kernel/io_apic.c~no-ioapic-check arch/i386/kernel/io_apic.c --- linux-2.6.13-rc3-mm2/arch/i386/kernel/io_apic.c~no-ioapic-check 2005-05-01 02:15:48.054362032 -0700 +++ linux-2.6.13-rc3-mm2-root/arch/i386/kernel/io_apic.c 2005-05-01 02:28:23.282549896 -0700 @@ -2436,13 +2436,18 @@ int __init io_apic_get_unique_id (int io unsigned long flags; int i = 0; + /* Don't check I/O APIC IDs for some xAPIC systems. They have + * no meaning without the serial APIC bus. + */ + + if (NO_IOAPIC_CHECK) + return apic_id; + /* * The P4 platform supports up to 256 APIC IDs on two separate APIC * buses (one for LAPICs, one for IOAPICs), where predecessors only * supports up to 16 on one shared APIC bus. * - * TBD: Expand LAPIC/IOAPIC support on P4-class systems to take full - * advantage of new APIC bus architecture. */ if (physids_empty(apic_id_map)) _ - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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