+static int vcpuop_register_runstate_info(CPUState *cs, CPUState *target,
+ uint64_t arg)
+{
+ struct vcpu_register_runstate_memory_area rma;
+ uint64_t gpa;
+ size_t len;
+
+ /* No need for 32/64 compat handling */
+ qemu_build_assert(sizeof(rma) == 8);
+ /* The runstate area actually does change size, but Linux copes. */
+
+ if (!target) {
+ return -ENOENT;
+ }
+
+ if (kvm_copy_from_gva(cs, arg, &rma, sizeof(rma))) {
+ return -EFAULT;
+ }
+
+ /* As with vcpu_time_info, Xen actually uses the GVA but KVM doesn't. */
+ if (!kvm_gva_to_gpa(cs, rma.addr.p, &gpa, &len, false)) {
+ return -EFAULT;
+ }
+
+ async_run_on_cpu(target, do_set_vcpu_runstate_gpa,
+ RUN_ON_CPU_HOST_ULONG(gpa));
+ return 0;
+}
+