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.
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <
20210305183123.3978098-11-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
if (++nr_unique_valid_eptps == 1)
kvm_vmx->hv_tlb_eptp = tmp_eptp;
- ret |= hv_remote_flush_eptp(tmp_eptp, range);
+ if (!ret)
+ ret = hv_remote_flush_eptp(tmp_eptp, range);
+
+ /*
+ * Stop processing EPTPs if a failure occurred and
+ * there is already a detected EPTP mismatch.
+ */
+ if (ret && nr_unique_valid_eptps > 1)
+ break;
}
/*