LXR qemu/hw/tpm/tpm_tis

   1/*
   2 * tpm_tis_sysbus.c - QEMU's TPM TIS SYSBUS Device
   3 *
   4 * Copyright (C) 2006,2010-2013 IBM Corporation
   5 *
   6 * Authors:
   7 *  Stefan Berger <stefanb@us.ibm.com>
   8 *  David Safford <safford@us.ibm.com>
   9 *
  10 * Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
  11 *
  12 * This work is licensed under the terms of the GNU GPL, version 2 or later.
  13 * See the COPYING file in the top-level directory.
  14 *
  15 * Implementation of the TIS interface according to specs found at
  16 * http://www.trustedcomputinggroup.org. This implementation currently
  17 * supports version 1.3, 21 March 2013
  18 * In the developers menu choose the PC Client section then find the TIS
  19 * specification.
  20 *
  21 * TPM TIS for TPM 2 implementation following TCG PC Client Platform
  22 * TPM Profile (PTP) Specification, Familiy 2.0, Revision 00.43
  23 */
  24
  25#include "qemu/osdep.h"
  26#include "hw/qdev-properties.h"
  27#include "migration/vmstate.h"
  28#include "hw/acpi/tpm.h"
  29#include "tpm_prop.h"
  30#include "hw/sysbus.h"
  31#include "tpm_tis.h"
  32#include "qom/object.h"
  33
  34struct TPMStateSysBus {
  35    /*< private >*/
  36    SysBusDevice parent_obj;
  37
  38    /*< public >*/
  39    TPMState state; /* not a QOM object */
  40};
  41
  42OBJECT_DECLARE_SIMPLE_TYPE(TPMStateSysBus, TPM_TIS_SYSBUS)
  43
  44static int tpm_tis_pre_save_sysbus(void *opaque)
  45{
  46    TPMStateSysBus *sbdev = opaque;
  47
  48    return tpm_tis_pre_save(&sbdev->state);
  49}
  50
  51static const VMStateDescription vmstate_tpm_tis_sysbus = {
  52    .name = "tpm-tis",
  53    .version_id = 0,
  54    .pre_save  = tpm_tis_pre_save_sysbus,
  55    .fields = (VMStateField[]) {
  56        VMSTATE_BUFFER(state.buffer, TPMStateSysBus),
  57        VMSTATE_UINT16(state.rw_offset, TPMStateSysBus),
  58        VMSTATE_UINT8(state.active_locty, TPMStateSysBus),
  59        VMSTATE_UINT8(state.aborting_locty, TPMStateSysBus),
  60        VMSTATE_UINT8(state.next_locty, TPMStateSysBus),
  61
  62        VMSTATE_STRUCT_ARRAY(state.loc, TPMStateSysBus, TPM_TIS_NUM_LOCALITIES,
  63                             0, vmstate_locty, TPMLocality),
  64
  65        VMSTATE_END_OF_LIST()
  66    }
  67};
  68
  69static void tpm_tis_sysbus_request_completed(TPMIf *ti, int ret)
  70{
  71    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
  72    TPMState *s = &sbdev->state;
  73
  74    tpm_tis_request_completed(s, ret);
  75}
  76
  77static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti)
  78{
  79    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
  80    TPMState *s = &sbdev->state;
  81
  82    return tpm_tis_get_tpm_version(s);
  83}
  84
  85static void tpm_tis_sysbus_reset(DeviceState *dev)
  86{
  87    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
  88    TPMState *s = &sbdev->state;
  89
  90    return tpm_tis_reset(s);
  91}
  92
  93static Property tpm_tis_sysbus_properties[] = {
  94    DEFINE_PROP_UINT32("irq", TPMStateSysBus, state.irq_num, TPM_TIS_IRQ),
  95    DEFINE_PROP_TPMBE("tpmdev", TPMStateSysBus, state.be_driver),
  96    DEFINE_PROP_BOOL("ppi", TPMStateSysBus, state.ppi_enabled, false),
  97    DEFINE_PROP_END_OF_LIST(),
  98};
  99
 100static void tpm_tis_sysbus_initfn(Object *obj)
 101{
 102    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(obj);
 103    TPMState *s = &sbdev->state;
 104
 105    memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops,
 106                          s, "tpm-tis-mmio",
 107                          TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT);
 108
 109    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
 110    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
 111}
 112
 113static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp)
 114{
 115    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
 116    TPMState *s = &sbdev->state;
 117
 118    if (!tpm_find()) {
 119        error_setg(errp, "at most one TPM device is permitted");
 120        return;
 121    }
 122
 123    if (!s->be_driver) {
 124        error_setg(errp, "'tpmdev' property is required");
 125        return;
 126    }
 127}
 128
 129static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data)
 130{
 131    DeviceClass *dc = DEVICE_CLASS(klass);
 132    TPMIfClass *tc = TPM_IF_CLASS(klass);
 133
 134    device_class_set_props(dc, tpm_tis_sysbus_properties);
 135    dc->vmsd  = &vmstate_tpm_tis_sysbus;
 136    tc->model = TPM_MODEL_TPM_TIS;
 137    dc->realize = tpm_tis_sysbus_realizefn;
 138    dc->user_creatable = true;
 139    dc->reset = tpm_tis_sysbus_reset;
 140    tc->request_completed = tpm_tis_sysbus_request_completed;
 141    tc->get_version = tpm_tis_sysbus_get_tpm_version;
 142    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 143}
 144
 145static const TypeInfo tpm_tis_sysbus_info = {
 146    .name = TYPE_TPM_TIS_SYSBUS,
 147    .parent = TYPE_SYS_BUS_DEVICE,
 148    .instance_size = sizeof(TPMStateSysBus),
 149    .instance_init = tpm_tis_sysbus_initfn,
 150    .class_init  = tpm_tis_sysbus_class_init,
 151    .interfaces = (InterfaceInfo[]) {
 152        { TYPE_TPM_IF },
 153        { }
 154    }
 155};
 156
 157static void tpm_tis_sysbus_register(void)
 158{
 159    type_register_static(&tpm_tis_sysbus_info);
 160}
 161
 162type_init(tpm_tis_sysbus_register)
 163