FreeBSD-SA-06:14.fpu

[David Xu]

Igor Sysoev wrote:
> 
> The last security advisory FreeBSD-SA-06:14.fpu
> ftp://ftp.freebsd.org/pub/FreeBSD/CERT/advisories/FreeBSD-SA-06:14.fpu.asc
> that fixes very doubtful security bug in AMD CPUs, also
> adds unnecessary penalty in FPU context switch for all other
> SSE-enabled CPUs.
> 
> 
> Igor Sysoev
> http://sysoev.ru/en/

Probably it should only be applied to AMD CPU but not Intel and others,
it is easy to check cpu vendor and put a
if (bug_fxsave)
	fpu_clean_state();

in file npx.c.

David Xu