• Jason Davis's avatar
    [PATCH] x86_64 genapic update · 90660ec3
    Jason Davis authored
    x86_64 genapic mechanism should be aware of machines that use physical APIC
    mode regardless of how many clusters/processors are detected.
    
    ACPI 3.0 FADT makes this determination very simple by providing a feature
    flag "force_apic_physical_destination_mode" to state whether the machine
    unconditionally uses physical APIC mode.
    
    Unisys' next generation x86_64 ES7000 will need to utilize this FADT
    feature flag in order to boot the x86_64 kernel in the correct APIC mode. 
    This patch has been tested on both x86_64 commodity and ES7000 boxes.
    Signed-off-by: default avatarJason Davis <jason.davis@unisys.com>
    Acked-by: default avatarAndi Kleen <ak@suse.de>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    90660ec3
genapic.c 2.59 KB