On Wed, Nov 07, 2012 at 10:01:11AM +0800, Xudong Hao wrote:
> Romove fpu lazy restore logic, using eager restore totally.
>
> v5 changes from v4:
> - remove lazy fpu restore totally, fpu eager restore does not have performance
> regression and simple the code.
>
> v4 changes from v3:
> - Wrap up some confused code with a clear function lazy_fpu_allowed()
> - Update fpu while update cr4 too.
>
> v3 changes from v2:
> - Make fpu active explicitly while guest xsave is enabling and non-lazy xstate
> bit exist.
>
> v2 changes from v1:
> - Expand KVM_XSTATE_LAZY to 64 bits before negating it.
>
> Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>
> ---
> arch/x86/kvm/vmx.c | 9 ++-------
> arch/x86/kvm/x86.c | 8 +-------
> include/linux/kvm_host.h | 1 -
> 3 files changed, 3 insertions(+), 15 deletions(-)
>
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 6599e45..c1fd2e1 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -1197,7 +1197,7 @@ static void update_exception_bitmap(struct kvm_vcpu *vcpu)
> u32 eb;
>
> eb = (1u << PF_VECTOR) | (1u << UD_VECTOR) | (1u << MC_VECTOR) |
> - (1u << NM_VECTOR) | (1u << DB_VECTOR);
> + (1u << DB_VECTOR);
> if ((vcpu->guest_debug &
> (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP)) ==
> (KVM_GUESTDBG_ENABLE | KVM_GUESTDBG_USE_SW_BP))
Please remove the code entirely, including:
if (is_no_device(intr_info)) {
vmx_fpu_activate(vcpu);
return 1;
}
and clts handling.
fpu_active/fpu_deactivate callbacks become unused, don't they?
Also remove fpu_active variable.
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