[Bug 1598029] Re: failed to boot a customized kernel if emulating Broadwell/Skylake

[Thomas Huth]

The QEMU project is currently considering to move its bug tracking to another 
system. For this we need to know which bugs are still valid and which could be 
closed already. Thus we are setting older bugs to "Incomplete" now.
If you still think this bug report here is valid, then please switch the state 
back to "New" within the next 60 days, otherwise this report will be marked as 
"Expired". Or mark it as "Fix Released" if the problem has be

** Changed in: qemu
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1598029

Title:
  failed to boot a customized kernel if emulating Broadwell/Skylake

Status in QEMU:
  Incomplete

Bug description:
  Hardware: X86-64, Intel(R) Core(TM) i7-6500U( Skylake)
  OS: Linux Mint 18
  Host Kernel: 4.5.7 + PaX/Grsecurity
  Qemu: QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.2)

  [Reproduction Steps]
  1, Install a Debian 8 in the guest
  2, Install a customized kernel( using same config to Debian 8)
  3, Reboot:
  qemu-system-x86_64 -hda debian8-test.img -boot d  -m 2048 -enable-kvm -usb 
-usbdevice tablet -net nic -net tap,ifname=tap0,script=no -cpu Broadwell -smp 2

  or

  qemu-system-x86_64 -hda debian8-test.img -boot d  -m 2048 -enable-kvm
  -usb -usbdevice tablet -net nic -net tap,ifname=tap0,script=no -cpu
  host -smp 2

  [Actual Result]  
  kernel panic or can't login in the system

  [Workaround]
  qemu-system-x86_64 -hda debian8-test.img -boot d  -m 2048 -enable-kvm -usb 
-usbdevice tablet -net nic -net tap,ifname=tap0,script=no -cpu Haswell -smp 2

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