Skip additional EPTP flushes if one fails when processing EPTPs for Hyper-V's paravirt TLB flushing. If _any_ flush fails, KVM falls back to a full global flush, i.e. additional flushes are unnecessary (and will likely fail anyways). Continue processing the loop unless a mismatch was already detected, e.g. to handle the case where the first flush fails and there is a yet-to-be-detected mismatch. Signed-off-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx> --- arch/x86/kvm/vmx/vmx.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index a45a90d44d24..e0fea09a6e42 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -517,7 +517,11 @@ static int hv_remote_flush_tlb_with_range(struct kvm *kvm, else mismatch = true; - ret |= hv_remote_flush_eptp(tmp_eptp, range); + if (!ret) + ret = hv_remote_flush_eptp(tmp_eptp, range); + + if (ret && mismatch) + break; } if (mismatch) kvm_vmx->hv_tlb_eptp = INVALID_PAGE; -- 2.28.0
