Re: FreeBSD-SA-06:14.fpu

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

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