tree 87822ac233419190178e164eceec6a63cd5aa8bf
parent a79c949573d8ee436cbee70c26aada8785329684
author Paolo Bonzini <pbonzini@redhat.com> 1594413858 -0400
committer Paolo Bonzini <pbonzini@redhat.com> 1594413858 -0400

cstart: do not assume CR4 starts as zero

The BIOS might leave some bits set in CR4; for example, CR4.DE=1 would
cause the SVM test for the DR intercept to fail, because DR4/DR5
can only be written when CR4.DE is clear, and otherwise trigger
a #GP exception.

Reported-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>