If you're running a guest on an Intel machine without unrestricted mode
support, the failure can be most likely due to the guest entering an invalid
state for Intel VT. For example, the guest maybe running in big real mode
which is not supported on less recent Intel processors.
Reproduced in Quantal with the last kernel (3.5.0-30-generic):
2013-05-23 15:39:27.176+0000: starting up local/sbin: /usr/local/ bin:/usr/ bin:/usr/ sbin:/sbin: /bin QEMU_AUDIO_DRV=none /usr/bin/kvm-spice -name windows1 -S -M pc-1.2 -enable-kvm -m 3500 2,cores= 1,threads= 1 -uuid d170225e- 7367-4ece- 4338-6b1811c10c 0c -no-user-config -nodefaults -chardev socket, id=charmonitor, path=/var/ lib/libvirt/ q monitor, server, nowait -mon chardev= charmonitor, id=monitor, mode=control -rtc base=localtime -no-shutdown -device piix3-usb- uhci,id= usb,bus= pci.0,addr kvm/windows1. img,if= none,id= drive-ide0- 0-0,format= qcow2 -device ide-hd, bus=ide. 0,unit= 0,drive= drive-ide0- 0-0,id= ide0-0- 0,bootindex= 1 -d iso/windows7ult imate.iso, if=none, id=drive- ide0-1- 0,readonly= on,format= raw -device ide-cd, bus=ide. 1,unit= 0,drive= drive-ide0- 1-0,id= ide0-1- 0 -netdev 30,id=hostnet0, vhost=on, vhostfd= 31 -device virtio- net-pci, netdev= hostnet0, id=net0, mac=52: 54:00:49: 32:cc,bus= pci.0,addr= 0x3 -chardev pty,id=charserial0 -d chardev= charserial0, id=serial0 -device usb-tablet, id=input0 -vnc 127.0.0.1:0 -vga std -device virtio- balloon- pci,id= balloon0, bus=pci. 0,addr= 0x4
LC_ALL=C PATH=/usr/
-smp 2,sockets=
emu/windows1.
=0x1.0x2 -drive file=/srv/
rive file=/srv/
tap,fd=
evice isa-serial,
char device redirected to /dev/pts/1
KVM: entry failed, hardware error 0x80000021
If you're running a guest on an Intel machine without unrestricted mode
support, the failure can be most likely due to the guest entering an invalid
state for Intel VT. For example, the guest maybe running in big real mode
which is not supported on less recent Intel processors.
EAX=00000010 EBX=00000080 ECX=00000000 EDX=00000080 00000 DR1=00000000000 00000 DR2=00000000000 00000 DR3=00000000000 00000 f0ff0 DR7=00000000000 00400 000000
ESI=0025da4a EDI=0007da4a EBP=00001f20 ESP=00000200
EIP=0000009b EFL=00000002 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0
ES =0020 00000200 0000ffff 00009300
CS =b000 002b0000 0000ffff 0000f300
SS =0020 00000200 0000ffff 0000f300
DS =0020 00000200 0000ffff 00009300
FS =0020 00000200 0000ffff 00009300
GS =0020 00000200 0000ffff 00009300
LDT=0000 00000000 0000ffff 00008200
TR =0000 00000000 0000ffff 00008b00
GDT= 002b0000 00000027
IDT= 00000000 000003ff
CR0=00000010 CR2=00000000 CR3=00000000 CR4=00000000
DR0=00000000000
DR6=00000000fff
EFER=0000000000
Code=02 00 00 ea 91 00 00 00 18 00 0f 20 c0 66 83 e0 fe 0f 22 c0 <66> 31 c0 8e d8 8e c0 8e d0 66 bc 00 04 00 00 8e e0 8e e8 ea 00 00 00 20 00 00 00 20 4a da