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:
> +static void kvm_vcpu_flush_tlb(struct kvm_vcpu *vcpu, bool invalidate_gpa)
> +{
> +     ++vcpu->stat.tlb_flush;
> +     kvm_x86_ops->tlb_flush(vcpu, invalidate_gpa);

WRT to PTI; how much does this actually invalidate? Does this invalidate
the _entire_ guest TLB, or only the current guest PCID?

> +}