LXR qemu/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
  18static 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
  31static 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
  43static 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
  55static 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
  68static 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
  76static void kvm_s390_skeys_register_types(void)
  77{
  78    type_register_static(&kvm_s390_skeys_info);
  79}
  80
  81type_init(kvm_s390_skeys_register_types)
  82