KVM: nVMX: Invoke ept_save_pdptrs() if and only if PAE paging is enabled
Invoke ept_save_pdptrs() when restoring L1's host state on a "late" VM-Fail if and only if PAE paging is enabled. This saves a CALL in the common case where L1 is a 64-bit host, and avoids incorrectly marking the PDPTRs as dirty. WARN if ept_save_pdptrs() is called with PAE disabled now that the nested usage pre-checks is_pae_paging(). Barring a bug in KVM's MMU, attempting to read the PDPTRs with PAE disabled is now impossible. Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Message-Id: <20200415203454.8296-2-sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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