[Bug 61411] [Nested]L2 guest failed to start in VMware on KVM

[bugzilla-daemon@bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=61411

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #2 from Zhou, Chao <chao.zhou@intel.com> ---
this commit fixed the bug:
commit a7c0b07d570848e50fce4d31ac01313484d6b844
Author: Wanpeng Li <wanpeng.li@linux.intel.com>
Date:   Thu Aug 21 19:46:50 2014 +0800

    KVM: nVMX: nested TPR shadow/threshold emulation

    This patch fix bug https://bugzilla.kernel.org/show_bug.cgi?id=61411

    TPR shadow/threshold feature is important to speed up the Windows guest.
    Besides, it is a must feature for certain VMM.

    We map virtual APIC page address and TPR threshold from L1 VMCS. If
    TPR_BELOW_THRESHOLD VM exit is triggered by L2 guest and L1 interested
    in, we inject it into L1 VMM for handling.

    Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
    Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
    [Add PAGE_ALIGNED check, do not write useless virtual APIC page address
     if TPR shadowing is disabled. - Paolo]
    Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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