KVM: add ioctls to save/store mpstate

So userspace can save/restore the mpstate during migration.

[avi: export the #define constants describing the value]
[christian: add s390 stubs]
[avi: ditto for ia64]

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 47cbc6e3fafd..099845574901 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -979,6 +979,30 @@ out_free2:
                 r = 0;
                 break;
         }
+        case KVM_GET_MP_STATE: {
+                struct kvm_mp_state mp_state;
+
+                r = kvm_arch_vcpu_ioctl_get_mpstate(vcpu, &mp_state);
+                if (r)
+                        goto out;
+                r = -EFAULT;
+                if (copy_to_user(argp, &mp_state, sizeof mp_state))
+                        goto out;
+                r = 0;
+                break;
+        }
+        case KVM_SET_MP_STATE: {
+                struct kvm_mp_state mp_state;
+
+                r = -EFAULT;
+                if (copy_from_user(&mp_state, argp, sizeof mp_state))
+                        goto out;
+                r = kvm_arch_vcpu_ioctl_set_mpstate(vcpu, &mp_state);
+                if (r)
+                        goto out;
+                r = 0;
+                break;
+        }
         case KVM_TRANSLATE: {
                 struct kvm_translation tr;