KVM: VMX: Optimize atomic EFER load

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When NX is enabled on the host but not on the guest, we use the entry/exit
msr load facility, which is slow.  Optimize it to use entry/exit efer load,
which is ~1200 cycles faster.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

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Avi Kivity 2010-12-21 12:54:20 +02:00

parent 07c116d2f5

commit 110312c84b

1 changed files with 30 additions and 0 deletions

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arch/x86/kvm/vmx.c

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