Re: SEP regression in kvm-20?

[Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>]

Rusty Russell wrote:
> Hi all,
>
> 	I note that Linux under kvm 20 doesn't use sysenter, while it did under
> kvm 19.  There's no "sep" in /proc/cpuinfo 

x86info does report sep, but arch/i386/kernel/cpu/intel.c has this to say:

        /* SEP CPUID bug: Pentium Pro reports SEP but doesn't have it 
until model 3 mask 3 */
        if ((c->x86<<8 | c->x86_model<<4 | c->x86_mask) < 0x633)
                clear_bit(X86_FEATURE_SEP, c->x86_capability);

whereas our cpu is

        cpu family      : 6
        model           : 2

so, no SEP for you.  I imagine we can bump the model and mask to 3.

> and the vendor id looks kinda
> random too: this looks like a cpuid problem?
>   

I see a

        vendor_id       : GenuineIntel

?

-- 
error compiling committee.c: too many arguments to function


-------------------------------------------------------------------------
This SF.net email is sponsored by DB2 Express
Download DB2 Express C - the FREE version of DB2 express and take
control of your XML. No limits. Just data. Click to get it now.
http://sourceforge.net/powerbar/db2/