From: Avi Kivity <avi-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
To: Jan Kiszka <jan.kiszka-kv7WeFo6aLtBDgjK7y7TUQ@public.gmane.org>
Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org
Subject: Re: Unhandled vm exit with old protected mode test
Date: Sun, 18 Nov 2007 12:31:09 +0200 [thread overview]
Message-ID: <4740146D.5040203@qumranet.com> (raw)
In-Reply-To: <473D61D7.5050303-kv7WeFo6aLtBDgjK7y7TUQ@public.gmane.org>
Jan Kiszka wrote:
> Hi,
>
> running some oldish 286 protected mode demo in kvm, I came across this
> bug of kvm-52:
>
> unhandled vm exit: 0x80000021 vcpu_id 0
> ds 0000 (00100000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0)
>
>
ds.base must equal ds.sel<<4 when entering real-mode on Intel. See
fix_rmode_seg() in vmx.c which clearly doesn't handle cases where
ds.base >= 0x100000. You might try forcing bits 20+ of ds.base to zero
in there. This may fix the problem or move it elsewhere.
--
error compiling committee.c: too many arguments to function
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next prev parent reply other threads:[~2007-11-18 10:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-11-16 9:24 Unhandled vm exit with old protected mode test Jan Kiszka
[not found] ` <473D61D7.5050303-kv7WeFo6aLtBDgjK7y7TUQ@public.gmane.org>
2007-11-18 10:31 ` Avi Kivity [this message]
[not found] ` <4740146D.5040203-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
2007-11-19 9:21 ` Jan Kiszka
[not found] ` <474155A9.6030804-kv7WeFo6aLtBDgjK7y7TUQ@public.gmane.org>
2007-11-19 13:39 ` Avi Kivity
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