diff options
Diffstat (limited to 'target/i386/kvm/kvm.c')
| -rw-r--r-- | target/i386/kvm/kvm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/target/i386/kvm/kvm.c b/target/i386/kvm/kvm.c index eee1a6b46e..59ed8327ac 100644 --- a/target/i386/kvm/kvm.c +++ b/target/i386/kvm/kvm.c @@ -1346,6 +1346,12 @@ static int hyperv_fill_cpuids(CPUState *cs, /* Unconditionally required with any Hyper-V enlightenment */ c->eax |= HV_HYPERCALL_AVAILABLE; + /* SynIC and Vmbus devices require messages/signals hypercalls */ + if (hyperv_feat_enabled(cpu, HYPERV_FEAT_SYNIC) && + !cpu->hyperv_synic_kvm_only) { + c->ebx |= HV_POST_MESSAGES | HV_SIGNAL_EVENTS; + } + /* Not exposed by KVM but needed to make CPU hotplug in Windows work */ c->edx |= HV_CPU_DYNAMIC_PARTITIONING_AVAILABLE; |