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 #include "qemu/module.h"
  17
  18 static bool kvm_s390_skeys_are_enabled(S390SKeysState *ss)
  19 {
  20     S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
  21     uint8_t single_key;
  22     int r;
  23
  24     r = skeyclass->get_skeys(ss, 0, 1, &single_key);
  25     if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
  26         error_report("S390_GET_KEYS error %d", r);
  27     }
  28     return (r == 0);
  29 }
  30
  31 static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
  32                               uint64_t count, uint8_t *keys)
  33 {
  34     struct kvm_s390_skeys args = {
  35         .start_gfn = start_gfn,
  36         .count = count,
  37         .skeydata_addr = (__u64)keys
  38     };
  39
  40     return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
  41 }
  42
  43 static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
  44                               uint64_t count, uint8_t *keys)
  45 {
  46     struct kvm_s390_skeys args = {
  47         .start_gfn = start_gfn,
  48         .count = count,
  49         .skeydata_addr = (__u64)keys
  50     };
  51
  52     return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
  53 }
  54
  55 static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
  56 {
  57     S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
  58     DeviceClass *dc = DEVICE_CLASS(oc);
  59
  60     skeyclass->skeys_are_enabled = kvm_s390_skeys_are_enabled;
  61     skeyclass->get_skeys = kvm_s390_skeys_get;
  62     skeyclass->set_skeys = kvm_s390_skeys_set;
  63
  64     /* Reason: Internal device (only one skeys device for the whole memory) */
  65     dc->user_creatable = false;
  66 }
  67
  68 static const TypeInfo kvm_s390_skeys_info = {
  69     .name          = TYPE_KVM_S390_SKEYS,
  70     .parent        = TYPE_S390_SKEYS,
  71     .instance_size = sizeof(S390SKeysState),
  72     .class_init    = kvm_s390_skeys_class_init,
  73     .class_size    = sizeof(S390SKeysClass),
  74 };
  75
  76 static void kvm_s390_skeys_register_types(void)
  77 {
  78     type_register_static(&kvm_s390_skeys_info);
  79 }
  80
  81 type_init(kvm_s390_skeys_register_types)