From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andi Kleen <andi@firstfloor.org>
Subject: Re: [PATCH] [RFC] More fp instructions for realmode
	emulation (Enables booting OS/2 as a HVM guest on Intel/VT hardware)
Date: Mon, 03 Mar 2008 15:52:44 +0100
Message-ID: <p73bq5v7tc3.fsf@bingen.suse.de>
References: <C3EEC883.148C1%keir.fraser@eu.citrix.com>
	<C3EECFDB.14954%keir.fraser@eu.citrix.com>
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To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>, Trolle Selander <trolle.selander@gmail.com>
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Keir Fraser <keir.fraser@eu.citrix.com> writes:

> Intel SDM Volume 1 Section 8.6 (?X87 FPU Exception Synchronization?) is very
> helpful in this regard. It confirms my suspicions, that we will need to wrap
> the FPU inline asms in some fixup glue. The only exceptions to this rule are

Yes you definitely need to. That was a kernel crash bug on native Linux
some time ago...

Also you need to do the same for any FXSAVEs/FXRSTORs if you haven't already.

-Andi