On Mon, 2013-02-18 at 19:16 +0100, Laszlo Ersek wrote: > On 02/18/13 18:45, Gleb Natapov wrote: > > On Mon, Feb 18, 2013 at 06:12:55PM +0100, Laszlo Ersek wrote: > > >> CS =f000 000f0000 0000ffff 0000f300 > >> ^ ^ ^ ^ > >> | base limit flags > >> selector > >> > > This is because real mode is emulated as vm86 mode on intel cpus without > > "unrestricted guest" flag. > > Awesome, this supports mys desperate hunch in > <http://lists.nongnu.org/archive/html/qemu-devel/2013-02/msg02689.html>. > I hope David can confirm in practice!
Yes, my working machines have unrestricted_guest support, and the non-working machines don't. So when we're emulating it in vm86, the extended segment base handling is broken. -- dwmw2
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