hw/s390x/s390-skeys-kvm.c

   1 /*
   2  * s390 storage key device
   3  *
   4  * Copyright 2015 IBM Corp.
   5  * Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com>
   6  *
   7  * This work is licensed under the terms of the GNU GPL, version 2 or (at
   8  * your option) any later version. See the COPYING file in the top-level
   9  * directory.
  10  */
  11
  12 #include "qemu/osdep.h"
  13 #include "hw/s390x/storage-keys.h"
  14 #include "sysemu/kvm.h"
  15 #include "qemu/error-report.h"
  16
  17 static int kvm_s390_skeys_enabled(S390SKeysState *ss)
  18 {
  19     S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
  20     uint8_t single_key;
  21     int r;
  22
  23     r = skeyclass->get_skeys(ss, 0, 1, &single_key);
  24     if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
  25         error_report("S390_GET_KEYS error %d", r);
  26     }
  27     return (r == 0);
  28 }
  29
  30 static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
  31                               uint64_t count, uint8_t *keys)
  32 {
  33     struct kvm_s390_skeys args = {
  34         .start_gfn = start_gfn,
  35         .count = count,
  36         .skeydata_addr = (__u64)keys
  37     };
  38
  39     return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
  40 }
  41
  42 static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
  43                               uint64_t count, uint8_t *keys)
  44 {
  45     struct kvm_s390_skeys args = {
  46         .start_gfn = start_gfn,
  47         .count = count,
  48         .skeydata_addr = (__u64)keys
  49     };
  50
  51     return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
  52 }
  53
  54 static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
  55 {
  56     S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
  57     DeviceClass *dc = DEVICE_CLASS(oc);
  58
  59     skeyclass->skeys_enabled = kvm_s390_skeys_enabled;
  60     skeyclass->get_skeys = kvm_s390_skeys_get;
  61     skeyclass->set_skeys = kvm_s390_skeys_set;
  62
  63     /* Reason: Internal device (only one skeys device for the whole memory) */
  64     dc->user_creatable = false;
  65 }
  66
  67 static const TypeInfo kvm_s390_skeys_info = {
  68     .name          = TYPE_KVM_S390_SKEYS,
  69     .parent        = TYPE_S390_SKEYS,
  70     .instance_size = sizeof(S390SKeysState),
  71     .class_init    = kvm_s390_skeys_class_init,
  72     .class_size    = sizeof(S390SKeysClass),
  73 };
  74
  75 static void kvm_s390_skeys_register_types(void)
  76 {
  77     type_register_static(&kvm_s390_skeys_info);
  78 }
  79
  80 type_init(kvm_s390_skeys_register_types)