tree e7caff282dd9019e1b19cd549609c6b991f29152
parent e8467fda83cdc9de53972fee0cd2e6916cf66f41
author Avi Kivity <avi@redhat.com> 1262169626 +0200
committer Marcelo Tosatti <mtosatti@redhat.com> 1267457750 -0300

KVM: Lazify fpu activation and deactivation

Defer fpu deactivation as much as possible - if the guest fpu is loaded, keep
it loaded until the next heavyweight exit (where we are forced to unload it).
This reduces unnecessary exits.

We also defer fpu activation on clts; while clts signals the intent to use the
fpu, we can't be sure the guest will actually use it.

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