LXR qemu/hw/s390x/tod-kvm.c

   1/*
   2 * TOD (Time Of Day) clock - KVM implementation
   3 *
   4 * Copyright 2018 Red Hat, Inc.
   5 * Author(s): David Hildenbrand <david@redhat.com>
   6 *
   7 * This work is licensed under the terms of the GNU GPL, version 2 or later.
   8 * See the COPYING file in the top-level directory.
   9 */
  10
  11#include "qemu/osdep.h"
  12#include "qapi/error.h"
  13#include "hw/s390x/tod.h"
  14#include "kvm_s390x.h"
  15
  16static void kvm_s390_tod_get(const S390TODState *td, S390TOD *tod, Error **errp)
  17{
  18    int r;
  19
  20    r = kvm_s390_get_clock_ext(&tod->high, &tod->low);
  21    if (r == -ENXIO) {
  22        r = kvm_s390_get_clock(&tod->high, &tod->low);
  23    }
  24    if (r) {
  25        error_setg(errp, "Unable to get KVM guest TOD clock: %s",
  26                   strerror(-r));
  27    }
  28}
  29
  30static void kvm_s390_tod_set(S390TODState *td, const S390TOD *tod, Error **errp)
  31{
  32    int r;
  33
  34    r = kvm_s390_set_clock_ext(tod->high, tod->low);
  35    if (r == -ENXIO) {
  36        r = kvm_s390_set_clock(tod->high, tod->low);
  37    }
  38    if (r) {
  39        error_setg(errp, "Unable to set KVM guest TOD clock: %s",
  40                   strerror(-r));
  41    }
  42}
  43
  44static void kvm_s390_tod_class_init(ObjectClass *oc, void *data)
  45{
  46    S390TODClass *tdc = S390_TOD_CLASS(oc);
  47
  48    tdc->get = kvm_s390_tod_get;
  49    tdc->set = kvm_s390_tod_set;
  50}
  51
  52static TypeInfo kvm_s390_tod_info = {
  53    .name = TYPE_KVM_S390_TOD,
  54    .parent = TYPE_S390_TOD,
  55    .instance_size = sizeof(S390TODState),
  56    .class_init = kvm_s390_tod_class_init,
  57    .class_size = sizeof(S390TODClass),
  58};
  59
  60static void register_types(void)
  61{
  62    type_register_static(&kvm_s390_tod_info);
  63}
  64type_init(register_types);
  65