[Bug 94771] New: [Nested kvm on kvm] 32bit win7 guest as L2 guest sho blue screen

[Bug 94771] New: [Nested kvm on kvm] 32bit win7 guest as L2 guest sho blue screen

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=94771

            Bug ID: 94771
           Summary: [Nested kvm on kvm] 32bit win7 guest as L2 guest sho
                    blue screen
           Product: Virtualization
           Version: unspecified
    Kernel Version: 4.0.0-rc1
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: kvm
          Assignee: virtualization_kvm@kernel-bugs.osdl.org
          Reporter: chao.zhou@intel.com
        Regression: No

Environment:
------------
Host OS (ia32/ia32e/IA64):ia32e
Guest OS (ia32/ia32e/IA64):ia32
Guest OS Type (Linux/Windows):Windows
kvm.git Commit:4ff6f8e61eb7f96d3ca535c6d240f863ccd6fb7d
qemu.kvm Commit:d598911b6f5e7bf7bafb63b8e1d074729e94aca7
Host Kernel Version: 4.0.0-rc1
Hardware:Ivytown_EP, Haswell_EP


Bug detailed description:
--------------------------
create 32bit win7 guest as L2 guest, the guest will show blue screen.

note:
create 32bit win8 or 32bit win8.1  as L2 guest, the guest boots up fine.


Reproduce steps:
----------------
1 create L1 guest:
 qemu-system-x86_64 -enable-kvm -m 8G -smp 4 -net nic,macaddr=00:12:31:34:51:31
-net tap,script=/etc/kvm/qemu-ifup nested-kvm.qcow -cpu host

2. create L2 guest
qemu-system-x86_64 -enable-kvm -m 2G -smp 2 -net none win7-32.qcow

Current result:
----------------
32bit win7 as L2 guest boots up fail

Expected result:
----------------
32bit win7 as L2 guest boots up fine

Basic root-causing log:
----------------------

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[Bug 94771] [Nested kvm on kvm] 32bit win7 guest as L2 guest sho blue screen

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=94771

Bandan Das <bsd@makefile.in> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Blocks|                            |94971

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[Bug 94771] [Nested kvm on kvm] 32bit win7 guest as L2 guest show blue screen

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=94771

Zhou, Chao <chao.zhou@intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[Nested kvm on kvm] 32bit   |[Nested kvm on kvm] 32bit
                   |win7 guest as L2 guest sho  |win7 guest as L2 guest show
                   |blue screen                 |blue screen

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