[Qemu-devel] [Bug 921208] Re: win7/x64 installer hangs on startup with 0x0000005d.

[Clemens Kolbitsch]

We have been discussing this issue on the QEMU mailing list. It is of
CPU definition, but none of the current configurations allow QEMU to
boot Windows7 64bit WITHOUT KVM. The issue behind it is that the TCG
(code generator) might not fully support all CPU bits required by Win7.

There is a patch to bypass this problem, but the OS still does not boot
reliably (BSODs occur after a few minutes).

Note that it works with KVM enabled

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https://bugs.launchpad.net/bugs/921208

Title:
  win7/x64 installer hangs on startup with 0x0000005d.

Status in QEMU:
  Confirmed

Bug description:
  hi,

  during booting win7/x64 installer i'm observing a bsod with 0x0000005d
  ( msdn: unsupported_processor ).

  used command line: qemu-system-x86_64 -m 2048 -hda w7-system.img
  -cdrom win7_x64.iso -boot d

  adding '-machine accel=kvm' instead of default tcg accel helps to
  boot.

  
  installed software:

  qemu-1.0
  linux-3.2.1
  glibc-2.14.1
  gcc-4.6.2

  hw cpu:

  processor       : 0..7
  vendor_id       : GenuineIntel
  cpu family      : 6
  model           : 42
  model name      : Intel(R) Core(TM) i7-2630QM CPU @ 2.00GHz
  stepping        : 7
  microcode       : 0x14
  cpu MHz         : 1995.739
  cache size      : 6144 KB
  physical id     : 0
  siblings        : 8
  core id         : 3
  cpu cores       : 4
  apicid          : 7
  initial apicid  : 7
  fpu             : yes
  fpu_exception   : yes
  cpuid level     : 13
  wp              : yes
  flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca 
cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx 
rdtscp lm constant_tsc arch_perfmon pebs bts rep_good nopl xtopology 
nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 
cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer xsave avx 
lahf_lm ida arat epb xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid
  bogomips        : 3992.23
  clflush size    : 64
  cache_alignment : 64
  address sizes   : 36 bits physical, 48 bits virtual

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