• Cliff Wickman's avatar
    x86, UV, BAU: Extend for more than 16 cpus per socket · cfa60917
    Cliff Wickman authored
    Fix a hard-coded limit of a maximum of 16 cpu's per socket.
    
    The UV Broadcast Assist Unit code initializes by scanning the
    cpu topology of the system and assigning a master cpu for each
    socket and UV hub. That scan had an assumption of a limit of 16
    cpus per socket. With Westmere we are going over that limit.
    The UV hub hardware will allow up to 32.
    
    If the scan finds the system has gone over that limit it returns
    an error and we print a warning and fall back to doing TLB
    shootdowns without the BAU.
    Signed-off-by: default avatarCliff Wickman <cpw@sgi.com>
    Cc: <stable@kernel.org> # .37.x
    LKML-Reference: <E1PZol7-0000mM-77@eag09.americas.sgi.com>
    Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
    cfa60917
uv_bau.h 16 KB