kvm: x86: Save/restore KVM-specific CPU states

Save and restore all so far neglected KVM-specific CPU states. Handling
the TSC stabilizes migration in KVM mode. The interrupt_bitmap and
mp_state are currently unused, but will become relevant for in-kernel
irqchip support. By including proper saving/restoring already, we avoid
having to increment CPU_SAVE_VERSION later on once again.

v2:
 - initialize mp_state runnable (for the boot CPU)

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

1 files changed, 20 insertions, 0 deletions

diff --git a/kvm-all.c b/kvm-all.c
index c9f09c7..c89e3b1 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -181,6 +181,26 @@ err:
     return ret;
 }
 
+int kvm_put_mp_state(CPUState *env)
+{
+    struct kvm_mp_state mp_state = { .mp_state = env->mp_state };
+
+    return kvm_vcpu_ioctl(env, KVM_SET_MP_STATE, &mp_state);
+}
+
+int kvm_get_mp_state(CPUState *env)
+{
+    struct kvm_mp_state mp_state;
+    int ret;
+
+    ret = kvm_vcpu_ioctl(env, KVM_GET_MP_STATE, &mp_state);
+    if (ret < 0) {
+        return ret;
+    }
+    env->mp_state = mp_state.mp_state;
+    return 0;
+}
+
 int kvm_sync_vcpus(void)
 {
     CPUState *env;