From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: Etherboot problems Date: Thu, 09 Nov 2006 19:49:05 +0200 Message-ID: <45536A11.6050808@qumranet.com> References: <874pt8ip14.wl%simon.kagstrom@bth.se> <455354AB.8000908@qumranet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Return-path: To: Simon Kagstrom In-Reply-To: <455354AB.8000908-atKUWr5tajBWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Avi Kivity wrote: >> 00000e75 660fb7ec movzx ebp, sp >> 00000e79 6601c5 add ebp, >> eax 00000e7c 660f01975200 lgdt >> single ptr [bx+0x52] >> 00000e82 0f20c0 mov eax, cr0 >> 00000e85 0c01 or al, 0x1 >> 00000e87 0f22c0 mov cr0, eax >> 00000e8a 66ffaf6a00 jmp far ptr [bx+0x6a] >> ... >> >> I'm not an expert on Intel-syntax 16-bit assembly, but I guess the >> last instruction is something like >> >> jmp *0x6a(%bx) >> >> . One thing which I'm sure of is if the vm exit was caused by the move >> to %cr0 or the jump. >> >> Any takes? I can supply the .iso if someone would like to play with it >> > > I've generated the .iso (nice interface) and will try to reproduce it. > > Thanks for testing -- we really need those wierd guests to test the > corner cases. > Very likely this is due to VT's inability to virtualize real mode correctly. Is anyone in the mood to extend x86_emulate.c to support real mode? -- error compiling committee.c: too many arguments to function ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642