• Andi Kleen's avatar
    [PATCH] x86_64: Don't assume BSP has ID 0 in new smp bootup · 18a2b647
    Andi Kleen authored
    This patch removes the assumption that LAPIC entries contain the BSP as its
    first entry.  This is a slight improvement to the temporary fix submitted by
    Suresh Siddha.
    
    - Removes assumption that LAPIC entries contain BSP first.
    
    - Builds x86_acpiid_to_apicid[] and bios_cpu_apicid[] properly with BSP as
      first entry.
    
    - Made maxcpus=1 boot on these systems.  Since the parsing earlier in
      arch/x86_64/kernel/mpparse.c stopped after maxcpus entries, other entries
      were not processed, this causes kernel not to boot on these systems.
    
    TBD: x86_acpiid_to_apicid and bios_cpu_apicid[] seem to be exactly the
         same.  This could be removed, but might need more work to cleanup.
    Signed-off-by: default avatarAshok Raj <ashok.raj@intel.com>
    Signed-off-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>
    18a2b647
smpboot.c 24.6 KB