qemu

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/*
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 * s390 storage key device
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 *
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 * Copyright 2015 IBM Corp.
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 * Author(s): Jason J. Herne <jjherne@linux.vnet.ibm.com>
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 *
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 * This work is licensed under the terms of the GNU GPL, version 2 or (at
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 * your option) any later version. See the COPYING file in the top-level
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 * directory.
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 */
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#include "qemu/osdep.h"
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#include "hw/s390x/storage-keys.h"
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#include "sysemu/kvm.h"
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#include "qemu/error-report.h"
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#include "qemu/module.h"
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static bool kvm_s390_skeys_are_enabled(S390SKeysState *ss)
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{
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    S390SKeysClass *skeyclass = S390_SKEYS_GET_CLASS(ss);
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    uint8_t single_key;
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    int r;
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    r = skeyclass->get_skeys(ss, 0, 1, &single_key);
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    if (r != 0 && r != KVM_S390_GET_SKEYS_NONE) {
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        error_report("S390_GET_KEYS error %d", r);
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    }
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    return (r == 0);
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}
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static int kvm_s390_skeys_get(S390SKeysState *ss, uint64_t start_gfn,
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                              uint64_t count, uint8_t *keys)
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{
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    struct kvm_s390_skeys args = {
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        .start_gfn = start_gfn,
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        .count = count,
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        .skeydata_addr = (__u64)keys
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    };
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    return kvm_vm_ioctl(kvm_state, KVM_S390_GET_SKEYS, &args);
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}
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static int kvm_s390_skeys_set(S390SKeysState *ss, uint64_t start_gfn,
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                              uint64_t count, uint8_t *keys)
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{
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    struct kvm_s390_skeys args = {
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        .start_gfn = start_gfn,
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        .count = count,
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        .skeydata_addr = (__u64)keys
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    };
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    return kvm_vm_ioctl(kvm_state, KVM_S390_SET_SKEYS, &args);
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}
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static void kvm_s390_skeys_class_init(ObjectClass *oc, void *data)
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{
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    S390SKeysClass *skeyclass = S390_SKEYS_CLASS(oc);
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    DeviceClass *dc = DEVICE_CLASS(oc);
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    skeyclass->skeys_are_enabled = kvm_s390_skeys_are_enabled;
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    skeyclass->get_skeys = kvm_s390_skeys_get;
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    skeyclass->set_skeys = kvm_s390_skeys_set;
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    /* Reason: Internal device (only one skeys device for the whole memory) */
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    dc->user_creatable = false;
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}
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static const TypeInfo kvm_s390_skeys_info = {
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    .name          = TYPE_KVM_S390_SKEYS,
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    .parent        = TYPE_S390_SKEYS,
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    .instance_size = sizeof(S390SKeysState),
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    .class_init    = kvm_s390_skeys_class_init,
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    .class_size    = sizeof(S390SKeysClass),
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};
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static void kvm_s390_skeys_register_types(void)
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{
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    type_register_static(&kvm_s390_skeys_info);
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}
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type_init(kvm_s390_skeys_register_types)
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