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, 19 insertions, 0 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b364d192896c..5c3c9d38c780 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -817,6 +817,7 @@ int kvm_dev_ioctl_check_extension(long ext)
         case KVM_CAP_CLOCKSOURCE:
         case KVM_CAP_PIT:
         case KVM_CAP_NOP_IO_DELAY:
+        case KVM_CAP_MP_STATE:
                 r = 1;
                 break;
         case KVM_CAP_VAPIC:
@@ -3083,6 +3084,24 @@ int kvm_arch_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
         return 0;
 }
 
+int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
+                                    struct kvm_mp_state *mp_state)
+{
+        vcpu_load(vcpu);
+        mp_state->mp_state = vcpu->arch.mp_state;
+        vcpu_put(vcpu);
+        return 0;
+}
+
+int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
+                                    struct kvm_mp_state *mp_state)
+{
+        vcpu_load(vcpu);
+        vcpu->arch.mp_state = mp_state->mp_state;
+        vcpu_put(vcpu);
+        return 0;
+}
+
 static void set_segment(struct kvm_vcpu *vcpu,
                         struct kvm_segment *var, int seg)
 {