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(parent: b7031fd) | patch
KVM: vmx: do not unconditionally clear EFER switching
authorSean Christopherson <sean.j.christopherson@intel.com>
Wed, 26 Sep 2018 16:23:43 +0000 (09:23 -0700)
committerPaolo Bonzini <pbonzini@redhat.com>
Tue, 16 Oct 2018 22:29:51 +0000 (00:29 +0200)
commit02343cf207022ba349a9d66562659fce87144369
treef6646bcbd9a5aea74b655463b25898b7f814162ftree | snapshot
parentb7031fd40fcc741b0f9b0c04c8d844e445858b84commit | diff
KVM: vmx: do not unconditionally clear EFER switching

Do not unconditionally call clear_atomic_switch_msr() when updating
EFER.  This adds up to four unnecessary VMWrites in the case where
guest_efer != host_efer, e.g. if the load_on_{entry,exit} bits were
already set.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx.c diff | blob | history
John Crispins staging tree