Re: [PATCH 15/19] kvm: x86: Save and restore guest XFD_ERR properly

Paolo Bonzini
2021-12-10T16:23:35Z

On 12/8/21 01:03, Yang Zhong wrote:
> kvm_steal_time_set_preempted(vcpu);
> srcu_read_unlock(&vcpu->kvm->srcu, idx);
>
> + if (vcpu->preempted)
> + fpu_save_guest_xfd_err(&vcpu->arch.guest_fpu);
> +

Instead of checking vcpu->preempted, can you instead check if the active
FPU is the guest FPU? That is, save if
current->thread.fpu->fpstate->is_guest?

Paolo