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 "hw/s390x/storage-keys.h"
  13 #include "sysemu/kvm.h"
  14 #include "qemu/error-report.h"
  15
  16 static int kvm_s390_skeys_enabled(S390SKeysState *ss)
  17 {
  18     S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
  19     uint8_t single_key;
  20     int r;
  21
  22     r = skeyclass->get_skeys(ss, 0, 1, &single_key);
  23     if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
  24         error_report("S390_GET_KEYS error %d", r);
  25     }
  26     return (r == 0);
  27 }
  28
  29 static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
  30                               uint64_t count, uint8_t *keys)
  31 {
  32     struct kvm_s390_skeys args = {
  33         .start_gfn = start_gfn,
  34         .count = count,
  35         .skeydata_addr = (__u64)keys
  36     };
  37
  38     return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
  39 }
  40
  41 static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
  42                               uint64_t count, uint8_t *keys)
  43 {
  44     struct kvm_s390_skeys args = {
  45         .start_gfn = start_gfn,
  46         .count = count,
  47         .skeydata_addr = (__u64)keys
  48     };
  49
  50     return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
  51 }
  52
  53 static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
  54 {
  55     S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
  56
  57     skeyclass->skeys_enabled = kvm_s390_skeys_enabled;
  58     skeyclass->get_skeys = kvm_s390_skeys_get;
  59     skeyclass->set_skeys = kvm_s390_skeys_set;
  60 }
  61
  62 static const TypeInfo kvm_s390_skeys_info = {
  63     .name          = TYPE_KVM_S390_SKEYS,
  64     .parent        = TYPE_S390_SKEYS,
  65     .instance_size = sizeof(S390SKeysState),
  66     .class_init    = kvm_s390_skeys_class_init,
  67     .class_size    = sizeof(S390SKeysClass),
  68 };
  69
  70 static void kvm_s390_skeys_register_types(void)
  71 {
  72     type_register_static(&kvm_s390_skeys_info);
  73 }
  74
  75 type_init(kvm_s390_skeys_register_types)