kvm: Enable XSAVE live migration support

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

1 files changed, 21 insertions, 0 deletions

diff --git a/kvm-all.c b/kvm-all.c
index 5684e515a..938030230 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -71,6 +71,7 @@ struct KVMState
 #endif
     int irqchip_in_kernel;
     int pit_in_kernel;
+    int xsave, xcrs;
 };
 
 static KVMState *kvm_state;
@@ -686,6 +687,16 @@ int kvm_init(int smp_cpus)
     s->debugregs = kvm_check_extension(s, KVM_CAP_DEBUGREGS);
 #endif
 
+    s->xsave = 0;
+#ifdef KVM_CAP_XSAVE
+    s->xsave = kvm_check_extension(s, KVM_CAP_XSAVE);
+#endif
+
+    s->xcrs = 0;
+#ifdef KVM_CAP_XCRS
+    s->xcrs = kvm_check_extension(s, KVM_CAP_XCRS);
+#endif
+
     ret = kvm_arch_init(s, smp_cpus);
     if (ret < 0)
         goto err;
@@ -1014,6 +1025,16 @@ int kvm_has_debugregs(void)
     return kvm_state->debugregs;
 }
 
+int kvm_has_xsave(void)
+{
+    return kvm_state->xsave;
+}
+
+int kvm_has_xcrs(void)
+{
+    return kvm_state->xcrs;
+}
+
 void kvm_setup_guest_memory(void *start, size_t size)
 {
     if (!kvm_has_sync_mmu()) {