[Bug 206579] KVM with passthrough generates "BUG: kernel NULL pointer dereference" and crashes

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https://bugzilla.kernel.org/show_bug.cgi?id=206579

--- Comment #18 from muncrief (rmuncrief@xxxxxxxxxxxxxxx) ---
Created attachment 287599
  --> https://bugzilla.kernel.org/attachment.cgi?id=287599&action=edit
svm.c patch

Ha! Of course I forgot to add the actual patch I ended up using, so here it is.

But hey, I told you I'm old :)

However I'm still assuming what I did was wrong. Though my VM is working fine,
the CPU-Z benchmark is significantly lower. For example the single threaded
performance is now around 480, and with kernel 5.5.5 it's a little over 500,
around 503 to 507.

Of course this is all anecdotal, and I haven't had time to do any real testing.
But I'm going to wait to hear from you gentlemen before I proceed any further.
I'd especially like to know how to tell if avic is even actually working.

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