Bugs item #2962575, was opened at 2010-03-03 13:20 Message generated for change (Tracker Item Submitted) made by erikvdk You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2962575&group_id=180599 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: intel Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Erik van der Kouwe (erikvdk) Assigned to: Nobody/Anonymous (nobody) Summary: MINIX 3.1.6 works in QEMU-0.12.3 only with KVM disabled Initial Comment: Dear all, If one runs the following commands after installing qemu-0.12.3 or qemu-kvm-0.12.3: wget http://www.minix3.org/download/minix_R3.1.6-r6084.iso.bz2 bunzip2 minix_R3.1.6-r6084.iso.bz2 qemu-system-x86_64 -cdrom minix_R3.1.6-r6084.iso -enable-kvm and presses 1 (Regular MINIX 3), the following error message results when loading MINIX: kvm: unhandled exit 80000021 kvm_run returned -22 The guest stops after that. This error message does not occur without the -enable-kvm switch. It does not occur with qemu-kvm-0.11.0 as bundled with Ubuntu. The problem occurs with the "qemu" binary from qemu-0.12.3 as well as "qemu-system-x86_64" from qemu-kvm-0.12.3, but in the former case no error message is printed. The code that is running when it fails is in https://gforge.cs.vu.nl/gf/project/minix/scmsvn/?action=browse&path=%2Ftrunk%2Fsrc%2Fboot%2Fboothead.s&revision=5918&view=markup. It happens in ext_copy: ext_copy: mov x_dst_desc+2, ax movb x_dst_desc+4, dl ! Set base of destination segment mov ax, 8(bp) mov dx, 10(bp) mov x_src_desc+2, ax movb x_src_desc+4, dl ! Set base of source segment mov si, #x_gdt ! es:si = global descriptor table shr cx, #1 ! Words to move movb ah, #0x87 ! Code for extended memory move int 0x15 The line that fails is "int 0x15", which performs a BIOS call to copy data from low memory to above the 1MB barrier. The machine is running in 16-bit real mode when this code is executed. Output for "uname -a" on the host: Linux hp364 2.6.31-20-generic #57-Ubuntu SMP Mon Feb 8 09:05:19 UTC 2010 i686 GNU/Linux Output for "cat /proc/cpuinfo" on the host: processor : 0 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU E8600 @ 3.33GHz stepping : 10 cpu MHz : 1998.000 cache size : 6144 KB physical id : 0 siblings : 2 core id : 0 cpu cores : 2 apicid : 0 initial apicid : 0 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority bogomips : 6650.50 clflush size : 64 power management: processor : 1 vendor_id : GenuineIntel cpu family : 6 model : 23 model name : Intel(R) Core(TM)2 Duo CPU E8600 @ 3.33GHz stepping : 10 cpu MHz : 1998.000 cache size : 6144 KB physical id : 0 siblings : 2 core id : 1 cpu cores : 2 apicid : 1 initial apicid : 1 fdiv_bug : no hlt_bug : no f00f_bug : no coma_bug : no fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe nx lm constant_tsc arch_perfmon pebs bts pni dtes64 monitor ds_cpl vmx smx est tm2 ssse3 cx16 xtpr pdcm sse4_1 xsave lahf_lm tpr_shadow vnmi flexpriority bogomips : 6649.80 clflush size : 64 power management: With kind regards, Erik ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=893831&aid=2962575&group_id=180599 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
