tree a601ec70eae2bf3ae5fc73b97c847851d3b9d692
parent 29a01803d992a9505e3813a81fbae9bdb5133410
author Sean Christopherson <sean.j.christopherson@intel.com> 1594846355 -0700
committer Paolo Bonzini <pbonzini@redhat.com> 1595971798 -0400

cstart64: do not assume CR4 should be zero

Explicitly zero cr4 in prepare_64() instead of "zeroing" it in the
common enter_long_mode().  Clobbering cr4 in enter_long_mode() breaks
switch_to_5level(), which sets cr4.LA57 before calling enter_long_mode()
and obviously expects cr4 to be preserved.

Fixes: d86ef58 ("cstart: do not assume CR4 starts as zero")
Cc: Nadav Amit <namit@vmware.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200715205235.13113-1-sean.j.christopherson@intel.com>
Reviewed-by: Nadav Amit <namit@vmware.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>