Re: [PATCH v8 4/4] KVM: X86: Add flush_on_enter before guest enter

[Peter Zijlstra]

On Tue, Dec 12, 2017 at 05:33:04PM -0800, Wanpeng Li wrote:
> +	if (xchg(&vcpu->arch.st.steal.preempted, KVM_VCPU_NOT_PREEMPTED) ==
> +			(KVM_VCPU_SHOULD_FLUSH | KVM_VCPU_PREEMPTED)) {
> +		/*
> +		 * Do TLB_FLUSH before entering the guest, its passed
> +		 * the stage of request checking
> +		 */
> +		kvm_vcpu_flush_tlb(vcpu, false);
> +	}

And not a single word, _anywhere_ on why this doesn't need
invalidate_gpa or wtf that actually is.