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From: Andi Kleen <andi@firstfloor.org>
To: Keir Fraser <keir.fraser@eu.citrix.com>
Cc: xen-devel <xen-devel@lists.xensource.com>,
	Trolle Selander <trolle.selander@gmail.com>
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	[thread overview]
Message-ID: <p73bq5v7tc3.fsf@bingen.suse.de> (raw)
In-Reply-To: <C3EECFDB.14954%keir.fraser@eu.citrix.com> (Keir Fraser's message of "Sat\, 01 Mar 2008 09\:18\:19 +0000")

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

  parent reply	other threads:[~2008-03-03 14:52 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-29 22:14 [PATCH] [RFC] More fp instructions for realmode emulation (Enables booting OS/2 as a HVM guest on Intel/VT hardware) Trolle Selander
2008-03-01  8:46 ` Keir Fraser
2008-03-01  9:18   ` Keir Fraser
2008-03-03 12:18     ` Trolle Selander
2008-03-03 12:21       ` Keir Fraser
2008-03-03 14:52     ` Andi Kleen [this message]
2008-03-03 15:00       ` Keir Fraser
2008-03-03 16:59         ` Andi Kleen
2008-03-03 17:30           ` Keir Fraser
2008-03-03 18:11             ` Andi Kleen
2008-03-04 10:13 ` Keir Fraser

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