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From:   bugzilla-daemon@bugzilla.kernel.org
To:     kvm@vger.kernel.org
Subject: [Bug 206579] KVM with passthrough generates "BUG: kernel NULL
 pointer dereference" and crashes
Date:   Sun, 03 May 2020 19:58:54 +0000
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https://bugzilla.kernel.org/show_bug.cgi?id=206579

Maxim Levitsky (maximlevitsky@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |maximlevitsky@gmail.com

--- Comment #63 from Maxim Levitsky (maximlevitsky@gmail.com) ---
I tried the patch from comment 55 and it works for me (3970X).

Maybe you have something disabled in the config? You need synic,'vapic' hyper-v
enlightenments disabled, and on top of that you need x2apic and svm (nested
virtualization) to be disabled in the guest cpu config. 

And you need to have PIC reinject policy to be set to 'discard'.

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