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 08:36:31 -0400 Message-ID: <4A53414F.3070300@pagestation.com> References: <4A525759.6090404@pagestation.com> <4A531B44.90803@redhat.com> <4A533A32.7000505@pagestation.com> <4A533CE7.2080706@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]:52804 "EHLO unifiedpaging.messagenetsystems.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754445AbZGGMgq (ORCPT ); Tue, 7 Jul 2009 08:36:46 -0400 In-Reply-To: <4A533CE7.2080706@redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Avi Kivity wrote: > On 07/07/2009 03:06 PM, Jerry Geis wrote: >>> Try -cpu 486,-fpu. >>> >> >> Avi, >> >> Running this command: >> qemu-system-x86_64 -net nic,model=rtl8139 -net user -hda $1 -no-acpi >> -usb -cpu 486,-fpu & >> >> I get a seg fault: >> qemu-system-x86[15419]: segfault at c ip 0000000000458b95 sp >> 0000000041d9df90 error 4 in qemu-system-x86_64[400000+208000] >> >> >> I am running kvm-87 centos 5.3 x86_64. > > Add -no-kvm-irqchip. A 486 doesn't have a local APIC, which the code > expects. > Running with this line: qemu-system-x86_64 -net nic,model=rtl8139 -net user -hda $1 -no-acpi -usb -cpu 486,-fpu -no-kvm-irqchip & My /proc/cpuinfo shows the follow: processor : 0 vendor_id : AuthenticAMD cpu family : 4 model : 0 model name : 04/00 stepping : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : no cpuid level : 0 wp : yes flags : bogomips : 2965.50 clflush size : 32 power management: Notice FPU indicates yes and I requested -fpu on the command line. also is this a 486 as it says AMD? Thanks, Jerry