lkml.org 
[lkml]   [2005]   [Sep]   [8]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] move i386's enabling of fxsr and xmmxcpt
    On Thu, 8 Sep 2005, Jan Beulich wrote:

    > (Note: Patch also attached because the inline version is certain to get
    > line wrapped.)
    >
    > Move some code unrelated to any dealing with hardware bugs from i386's
    > bugs.h to a more logical place.
    >
    > Signed-off-by: Jan Beulich <jbeulich@novell.com>
    >
    > diff -Npru 2.6.13/arch/i386/kernel/traps.c
    > 2.6.13-i386-fxsr/arch/i386/kernel/traps.c
    > --- 2.6.13/arch/i386/kernel/traps.c 2005-08-29 01:41:01.000000000
    > +0200
    > +++ 2.6.13-i386-fxsr/arch/i386/kernel/traps.c 2005-09-07
    > 11:46:35.000000000 +0200
    > @@ -1098,6 +1098,24 @@ void __init trap_init(void)
    > #endif
    > set_trap_gate(19,&simd_coprocessor_error);
    >
    > + if (cpu_has_fxsr) {
    > + /*
    > + * Verify that the FXSAVE/FXRSTOR data will be 16-byte
    > aligned.
    > + */
    > + struct fxsrAlignAssert {
    > + int _:!(offsetof(struct task_struct,
    > thread.i387.fxsave) & 15);
    > + };
    > +
    > + printk(KERN_INFO "Enabling fast FPU save and restore...
    > ");
    > + set_in_cr4(X86_CR4_OSFXSR);
    > + printk("done.\n");
    > + }
    > + if (cpu_has_xmm) {
    > + printk(KERN_INFO "Enabling unmasked SIMD FPU exception
    > support... ");
    > + set_in_cr4(X86_CR4_OSXMMEXCPT);
    > + printk("done.\n");
    > + }
    > +
    > set_system_gate(SYSCALL_VECTOR,&system_call);

    Hmm doesn't this really belong in identify_cpu()?
    -
    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: 2005-09-08 19:54    [W:0.020 / U:30.364 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site