lkml.org 
[lkml]   [2007]   [May]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: 2.6.22-rc1 does not boot on VIA C3_2 cause of X86_CMPXCHG64
    On Thu, May 17, 2007 at 02:09:16AM +0200, Christian wrote:

    > my small VIA C3_2 box does not boot with 2.6.22-rc1.
    > It even does not uncompress the kernel.
    >
    > The configuration as M386 M486 works. But M586 + MVIAC3_2
    > does not work.
    >
    > solution for me, cahnge arch/i386/Kconfig.cpu
    >
    > --- arch/i386/Kconfig.cpu.before 2007-05-17 01:38:26.000000000 +0200
    > +++ arch/i386/Kconfig.cpu 2007-05-17 00:54:52.000000000 +0200
    > @@ -299,5 +299,5 @@
    >
    > config X86_CMPXCHG64
    > bool
    > - depends on !M386 && !M486
    > + depends on !M386 && !M486 && !MVIAC3_2
    > default y
    >
    >
    > The related #ifdef is in ./include/asm-i386/cmpxchg.h
    > May be cmpxchg8b is not supported by VIAC3_2 ?
    >
    > May be some other non Intel/AMD need to be excluded from X86_CMPXCHG64 ?
    > May be the generic option CONFIG_X86_GENERIC need to switch this off also ?

    The C3s all have cx8, but it needs to be enabled in an MSR first.
    (See arch/i386/kernel/cpu/centaur.c , search for CX8)

    Did we add code that uses cmpxchg8b before identify_cpu() gets run ?
    I've not been paying attention to .22rc (busy trying to beat .21 into shape for F7)
    so I may have missed something obvious. Andi?

    Dave

    --
    http://www.codemonkey.org.uk
    -
    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/

    \
     
     \ /
      Last update: 2007-05-17 02:45    [W:0.020 / U:31.032 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site