Date: Sun, 30 Apr 2006 16:59:49 +0800 From: David Xu <davidxu@freebsd.org> To: Igor Sysoev <is@rambler-co.ru> Cc: freebsd-current@freebsd.org Subject: Re: FreeBSD-SA-06:14.fpu Message-ID: <44547C85.7040107@freebsd.org> In-Reply-To: <20060430115932.Y39336@is.park.rambler.ru> References: <20060430115932.Y39336@is.park.rambler.ru>
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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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