i386/kvm: hv-tlbflush/ipi require hv-vpindex

The corresponding hypercalls require using VP indexes.
Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20190517141924.19024-8-vkuznets@redhat.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

target/i386/kvm.c

@@ -782,7 +782,8 @@ static struct {
             {.fw = FEAT_HV_RECOMM_EAX,
              .bits = HV_REMOTE_TLB_FLUSH_RECOMMENDED |
              HV_EX_PROCESSOR_MASKS_RECOMMENDED}
-        }
+        },
+        .dependencies = BIT(HYPERV_FEAT_VPINDEX)
     },
     [HYPERV_FEAT_EVMCS] = {
         .desc = "enlightened VMCS (hv-evmcs)",
@@ -797,7 +798,8 @@ static struct {
             {.fw = FEAT_HV_RECOMM_EAX,
              .bits = HV_CLUSTER_IPI_RECOMMENDED |
              HV_EX_PROCESSOR_MASKS_RECOMMENDED}
-        }
+        },
+        .dependencies = BIT(HYPERV_FEAT_VPINDEX)
     },
 };