tree 7321a4bb3c30f9ac03804f6afc1950076fa04c04
parent c83858a4e0b3b6d9554c866cb5163a27fa5964bf
author Sean Christopherson <sean.j.christopherson@intel.com> 1593742743 -0700
committer Paolo Bonzini <pbonzini@redhat.com> 1593792972 -0400

x86: access: Add test for illegal toggling of CR4.LA57 in 64-bit mode

Add a test to verify that KVM correctly injects a #GP if the guest
attempts to toggle CR4.LA57 while 64-bit mode is active.  Use two
versions of the toggling, one to toggle only LA57 and a second to toggle
PSE in addition to LA57.  KVM doesn't intercept LA57, i.e. toggling only
LA57 effectively tests the CPU, not KVM.  Use PSE as the whipping boy as
it will not trigger a #GP on its own, is universally available, is
ignored in 64-bit mode, and most importantly is trapped by KVM.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200703021903.5683-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>