kvm: x86: Add support for VCPU event states

This patch extends the qemu-kvm state sync logic with support for
KVM_GET/SET_VCPU_EVENTS, giving access to yet missing exception,
interrupt and NMI states.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

1 files changed, 11 insertions, 0 deletions

diff --git a/kvm-all.c b/kvm-all.c
index b8ffe546c5..15ec38e631 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -61,6 +61,7 @@ struct KVMState
     int coalesced_mmio;
     int broken_set_mem_region;
     int migration_log;
+    int vcpu_events;
 #ifdef KVM_CAP_SET_GUEST_DEBUG
     struct kvm_sw_breakpoint_head kvm_sw_breakpoints;
 #endif
@@ -479,6 +480,11 @@ int kvm_init(int smp_cpus)
     }
 #endif
 
+    s->vcpu_events = 0;
+#ifdef KVM_CAP_VCPU_EVENTS
+    s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
+#endif
+
     ret = kvm_arch_init(s, smp_cpus);
     if (ret < 0)
         goto err;
@@ -868,6 +874,11 @@ int kvm_has_sync_mmu(void)
 #endif
 }
 
+int kvm_has_vcpu_events(void)
+{
+    return kvm_state->vcpu_events;
+}
+
 void kvm_setup_guest_memory(void *start, size_t size)
 {
     if (!kvm_has_sync_mmu()) {