KVM: VMX: Give the guest ownership of cr0.ts when the fpu is active

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If the guest fpu is loaded, there is nothing interesing about cr0.ts; let
the guest play with it as it will.  This makes context switches between fpu
intensive guest processes faster, as we won't trap the clts and cr0 write
instructions.

[marcelo: fix cr0 read shadow update on fpu deactivation; kills F8 install]

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

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Avi Kivity 2009-12-30 18:07:40 +02:00 • committed by Marcelo Tosatti

parent 02daab21d9

commit edcafe3c5a

1 changed files with 9 additions and 2 deletions

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arch/x86/kvm/vmx.c

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