KVM: unknown exit, hardware reason 31

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Hello,

I'm running a lot of identical VMs under KVM. Sometimes (one time per
2000-3000 runs) I got following:

1. VM is paused in libvirt. It can't be just resumed. I can just reset
it and resume.
2. In VM log file I see following: "KVM: unknown exit, hardware reason
31" with a CPU dump.
3. In dmesg I see following:
[84245.284948] EPT: Misconfiguration.
[84245.285056] EPT: GPA: 0xfeda848
[84245.285154] ept_misconfig_inspect_spte: spte 0x5eaef50107 level 4
[84245.285344] ept_misconfig_inspect_spte: spte 0x5f5fadc107 level 3
[84245.285532] ept_misconfig_inspect_spte: spte 0x5141d18107 level 2
[84245.285723] ept_misconfig_inspect_spte: spte 0x52e40dad77 level 1

OS. 3.16.0-44-generic #59~14.04.1-Ubuntu SMP
QEMU: QEMU emulator version 2.0.0 (Debian 2.0.0+dfsg-2ubuntu1.14),
Copyright (c) 2003-2008 Fabrice Bellard

Is it linux kvm bug or CPU bug? How can I fix that?

I can reproduce the bug in one-two days. Is it possible to enable
deeper debug for the issue?

Thanks

-- 
With best regards, Pavel S. Shirshov
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