Date: Fri, 20 May 2011 18:45:35 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: Kostik Belousov <kostikbel@gmail.com> Cc: svn-src-stable@freebsd.org, svn-src-all@freebsd.org, src-committers@freebsd.org, svn-src-stable-8@freebsd.org Subject: Re: svn commit: r222150 - in stable/8/sys: amd64/amd64 amd64/include i386/i386 i386/include Message-ID: <201105201845.37305.jkim@FreeBSD.org> In-Reply-To: <20110520223048.GI48734@deviant.kiev.zoral.com.ua> References: <201105202222.p4KMMuqT003163@svn.freebsd.org> <20110520223048.GI48734@deviant.kiev.zoral.com.ua>
next in thread | previous in thread | raw e-mail | index | archive | help
On Friday 20 May 2011 06:30 pm, Kostik Belousov wrote: > On Fri, May 20, 2011 at 10:22:56PM +0000, Jung-uk Kim wrote: > > Author: jkim > > Date: Fri May 20 22:22:56 2011 > > New Revision: 222150 > > URL: http://svn.freebsd.org/changeset/base/222150 > > > > Log: > > MFC: r221188 > > > > Define "Hypervisor Present" bit. This bit is used by several > > hypervisors to identify CPUs running under emulation. > > In the latest revision of the Software Developer's Manual, Intel > stated that bit 31 is always 0 for the real CPUs. So it is as much > official as it can be. OTOH, AMD's "CPUID Specification" says "Reserved for use by hypervisor to indicate guest status". :-) Jung-uk Kim
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201105201845.37305.jkim>