KVM: x86/mmu: Add a helper to calculate root from role_regs

Add a helper to calculate the level for non-EPT page tables from the
MMU's role_regs.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-45-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-06-22 10:57:29 -07:00 • committed by Paolo Bonzini
commit f4bd6f7376