Can’t install or boot up 32bit win8 guest.

[Yongjie Ren]

Environment:
------------
Host OS (ia32/ia32e/IA64):ia32e
Guest OS (ia32/ia32e/IA64):ia32e
Guest OS Type (Linux/Windows):Linux(rhel6u1)
kvm.git Commit:51bfd2998113e1f8ce8dcf853407b76a04b5f2a0
qemu-kvm Commit:3fd9fedb9fae4517d93d76e93a2924559cacf2f6
Host Kernel Version:3.4.0-rc7
Hardware:WSM-EP,Romley-EP

Bug detailed description:
--------------------------
it can't install or boot up 32bit Win8(Consumer Preview Update 2) guest. The guest will crash with the following error, while 64bit Win8 and 32bit Win7 guest work fine.
-----Win8 Error-------
Your computer needs to restart.
Please hold down the power button.
Error code: 0x0000005D
Parameters:
0x03060D03
0x756E6547
0x49656E69
0x6C65746E
-----Win8 Error-------

"0x0000005D" code means "UNSUPPORTED_PROCESSOR" in Windows.

BTW, you can get 32bit Win8 ISO from the following website.
http://windows.microsoft.com/en-US/windows-8/iso

Reproduce steps:
----------------
1. get 32 bit win8 ISO
2. prepare a disk image: dd if=/dev/zero of=/root/win8-32.img bs=1M count=16384
3. start a guest to install 32bit win8: qemu-system –m 4096 –smp 4 –hda /root/win8-32.img –cdrom /media/32bit-Win8.iso
4. if you have a 32bit win8 image,try to boot it up

Current result:
----------------
32bit Win8 guest crash

Expected result:
----------------
32bit win8 guest boot up correctly

[Rovano (rovano)]

I use Virtualbox latest and same problem.
Try 64 edition Windows...

[Rovano (rovano)]

Vmware player 4.0.2 is ok.

[Yongjie Ren (yongjie-ren)]

64bit Win8 client can work fine as a kvm guest, however, 32bit can't work.

[Jan Kiszka (jan-kiszka)]

Try varying the CPU type (-cpu ...). Some work for me here, others don't. Likely some subtle bug(s) in the definitions.

[Yongjie Ren (yongjie-ren)]

For 32bit Win8, I used different cpu mode and got different results as following.
n270: can boot up
athlon: fail (Error code: 0x0000005D)
pentium3: can boot up
pentium2: fail(Error code: 0x0000005D)
Pentium: fail(error code: 0xc0000260)
486: fail(error code: 0xc0000260)
Coreduo: can boog up
Kvm32: can boot up
Qemu32: can boot up
Kvm64: can bootup
Core2duo: can boot up
Phenom: can boot up
Qemu64: fail (Error code: 0x0000005D)

[root@jay-linux ~]# qemu-system-x86_64 -cpu ?
x86 [n270]
x86 [athlon]
x86 [pentium3]
x86 [pentium2]
x86 [pentium]
x86 [486]
x86 [coreduo]
x86 [kvm32]
x86 [qemu32]
x86 [kvm64]
x86 [core2duo]
x86 [phenom]
x86 [qemu64]

[Marcelo Tosatti (mtosatti)]

PAE/NX/SSE2 Support Requirement Guide for Windows 8

http://answers.microsoft.com/en-us/windows/forum/windows_8-windows_install/error-when-installing-windows-8-release-preview/a2c11f2c-d43b-44fc-9bc0-61805a2d95ef

Perhaps adding 3DNow allows qemu64 to boot?

In any case, this is not a KVM bug.

[Yongjie Ren (yongjie-ren)]

qemu64 cpu model has PAE/NX/SSE2 Support by default.
Also, after I used "-cpu qemu64,+3dnow", 32bit Win8 also can't be installed and had a BSOD with "Error code: 0x0000005D".

[chao zhou (chao-zhou)]

It's not a KVM bug.

[Stefan Weil (ubuntu-weilnetz)]

It's not a KVM bug, but a well known problem of QEMU without KVM (TCG). There is currently no solution.