From: Julian Seward <jseward@acm.org>
To: qemu-devel@nongnu.org
Cc: Werner Dittmann <Werner.Dittmann@t-online.de>
Subject: Re: [Qemu-devel] Kqemu on x86_64 host with x86_64 guest
Date: Sat, 13 Oct 2007 19:13:57 +0200 [thread overview]
Message-ID: <200710131913.58047.jseward@acm.org> (raw)
In-Reply-To: <4710D52D.1060903@t-online.de>
On Saturday 13 October 2007 16:24, Werner Dittmann wrote:
> Bruno Cornec wrote:
> > On Sat, Oct 13, 2007 at 01:53:37PM +0200, Bruno Cornec wrote:
> >> However, mandriva 2008.0 x86_64 doesn't exhibit this error on the same
> >> host.
> >
> > I stand corrected. It also crashed but later during the install process,
> > where the other were at the start. Back to -no-kqemu.
> >
> > Bruno.
>
> Even when using -no-kqemu it somehow fails/hangs during setup of Grub
> when I try to install a openSuse 10.2 or 10.3 . These problems are know
> for quite some time - but no solution yet.
Yes. I also observed that with openSUSE 10.{1,2,3}. After some
experimentation I successfully installed 10.1 by asking the installer
to use LILO instead of Grub. However, even then, some user space
code does not work properly - running the YaST online update inside the
successfully-installed 10.1 fails.
I wondered if there is some problem in the x86_64 instruction set emulation.
I ran some tests from Valgrind, and it appears that some FP->int conversion
instructions do not take care of the rounding mode. I did not detect
any other errors. See
http://lists.gnu.org/archive/html/qemu-devel/2007-10/msg00233.html
I tried to build x86_64-softmmu using softfloat.c rather than
softfloat-native.c since it looks like softfloat.c emulates these
corner cases (rounding mode, etc) more completely. So far I got
a lot of compilation errors and did not make much progress. I get
the impression x86_64-softmmu and i386-softmmu are intended only to
be built with softfloat-native.c.
It might be worth installing SuSE 10.1 and finding some small program
which fails to work properly. Then we might have a hope of determining
what the problem is.
J
prev parent reply other threads:[~2007-10-13 17:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-12 1:27 [Qemu-devel] Kqemu on x86_64 host with x86_64 guest Alexander Sennhauser
2007-10-12 6:04 ` Bruno Cornec
2007-10-13 11:53 ` Bruno Cornec
2007-10-13 12:05 ` Bruno Cornec
2007-10-13 14:24 ` Werner Dittmann
2007-10-13 17:08 ` Bruno Cornec
2007-10-13 17:13 ` Julian Seward [this message]
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