From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jerry Geis Subject: Re: kvm guest for 486 sx Date: Tue, 07 Jul 2009 10:58:17 -0400 Message-ID: <4A536289.6070101@pagestation.com> References: <4A525759.6090404@pagestation.com> <4A531B44.90803@redhat.com> <4A533A32.7000505@pagestation.com> <4A533CE7.2080706@redhat.com> <4A53414F.3070300@pagestation.com> <4A53448A.7050002@redhat.com> <4A534A8F.2030702@pagestation.com> <4A534C46.3040603@redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: kvm@vger.kernel.org To: Avi Kivity Return-path: Received: from www.digitalsignage.messagenetsystems.com ([24.123.23.170]:53582 "EHLO unifiedpaging.messagenetsystems.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1758450AbZGGO6h (ORCPT ); Tue, 7 Jul 2009 10:58:37 -0400 In-Reply-To: <4A534C46.3040603@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > On 07/07/2009 04:15 PM, Jerry Geis wrote: >>>> Notice FPU indicates yes and I requested -fpu on the command line. >>> >>> I think it detects the host fpu as a 487 coprocessor. Anything in >>> dmesg about it? Note there's no fpu in the flags: line. >>> >>> That's a kvm kernel bug. >>> >>>> also is this a 486 as it says AMD? >>> >>> You can override it if you like, -cpu 486,vendor=AuthenticAMD (I >>> think). >>> >> >> Sorry - I thought the " -cpu 486,-fpu " was the way to turn off the fpu. >> I 'm trying to emulute a 486 sx that has no fpu. > > I thought so too, but in fact it emulates a 486sx+487. We can make it > emulate a 486sx without a 487, but that will take a kernel patch. > I'd be interested in that if you can make it happen. jerry