On 03.07.2013, at 14:42, Mihai Caraman wrote:
> Increase FPU laziness by calling kvmppc_load_guest_fp() just before
> returning to guest instead of each sched in. Without this improvement
> an interrupt may also claim floting point corrupting guest state.
Not sure I follow. Could you please describe exactly what's happening?
Alex
>
> Signed-off-by: Mihai Caraman <mihai.caraman@xxxxxxxxxxxxx>
> ---
> arch/powerpc/kvm/booke.c | 1 +
> arch/powerpc/kvm/e500mc.c | 2 --
> 2 files changed, 1 insertions(+), 2 deletions(-)
>
> diff --git a/arch/powerpc/kvm/booke.c b/arch/powerpc/kvm/booke.c
> index 113961f..3cae2e3 100644
> --- a/arch/powerpc/kvm/booke.c
> +++ b/arch/powerpc/kvm/booke.c
> @@ -1204,6 +1204,7 @@ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu,
> r = (s << 2) | RESUME_HOST | (r & RESUME_FLAG_NV);
> } else {
> kvmppc_lazy_ee_enable();
> + kvmppc_load_guest_fp(vcpu);
> }
> }
>
> diff --git a/arch/powerpc/kvm/e500mc.c b/arch/powerpc/kvm/e500mc.c
> index 19c8379..09da1ac 100644
> --- a/arch/powerpc/kvm/e500mc.c
> +++ b/arch/powerpc/kvm/e500mc.c
> @@ -143,8 +143,6 @@ void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
> kvmppc_e500_tlbil_all(vcpu_e500);
> __get_cpu_var(last_vcpu_on_cpu) = vcpu;
> }
> -
> - kvmppc_load_guest_fp(vcpu);
> }
>
> void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
> --
> 1.7.3.4
>
>
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