LXR qemu/hw/tpm/tpm_tis

   1/*
   2 * tpm_tis_isa.c - QEMU's TPM TIS ISA 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/isa/isa.h"
  27#include "hw/qdev-properties.h"
  28#include "migration/vmstate.h"
  29#include "hw/acpi/tpm.h"
  30#include "tpm_prop.h"
  31#include "tpm_tis.h"
  32#include "qom/object.h"
  33
  34struct TPMStateISA {
  35    /*< private >*/
  36    ISADevice parent_obj;
  37
  38    /*< public >*/
  39    TPMState state; /* not a QOM object */
  40};
  41
  42OBJECT_DECLARE_SIMPLE_TYPE(TPMStateISA, TPM_TIS_ISA)
  43
  44static int tpm_tis_pre_save_isa(void *opaque)
  45{
  46    TPMStateISA *isadev = opaque;
  47
  48    return tpm_tis_pre_save(&isadev->state);
  49}
  50
  51static const VMStateDescription vmstate_tpm_tis_isa = {
  52    .name = "tpm-tis",
  53    .version_id = 0,
  54    .pre_save  = tpm_tis_pre_save_isa,
  55    .fields = (VMStateField[]) {
  56        VMSTATE_BUFFER(state.buffer, TPMStateISA),
  57        VMSTATE_UINT16(state.rw_offset, TPMStateISA),
  58        VMSTATE_UINT8(state.active_locty, TPMStateISA),
  59        VMSTATE_UINT8(state.aborting_locty, TPMStateISA),
  60        VMSTATE_UINT8(state.next_locty, TPMStateISA),
  61
  62        VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0,
  63                             vmstate_locty, TPMLocality),
  64
  65        VMSTATE_END_OF_LIST()
  66    }
  67};
  68
  69static void tpm_tis_isa_request_completed(TPMIf *ti, int ret)
  70{
  71    TPMStateISA *isadev = TPM_TIS_ISA(ti);
  72    TPMState *s = &isadev->state;
  73
  74    tpm_tis_request_completed(s, ret);
  75}
  76
  77static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti)
  78{
  79    TPMStateISA *isadev = TPM_TIS_ISA(ti);
  80    TPMState *s = &isadev->state;
  81
  82    return tpm_tis_get_tpm_version(s);
  83}
  84
  85static void tpm_tis_isa_reset(DeviceState *dev)
  86{
  87    TPMStateISA *isadev = TPM_TIS_ISA(dev);
  88    TPMState *s = &isadev->state;
  89
  90    return tpm_tis_reset(s);
  91}
  92
  93static Property tpm_tis_isa_properties[] = {
  94    DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ),
  95    DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver),
  96    DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true),
  97    DEFINE_PROP_END_OF_LIST(),
  98};
  99
 100static void tpm_tis_isa_initfn(Object *obj)
 101{
 102    TPMStateISA *isadev = TPM_TIS_ISA(obj);
 103    TPMState *s = &isadev->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
 110static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp)
 111{
 112    TPMStateISA *isadev = TPM_TIS_ISA(dev);
 113    TPMState *s = &isadev->state;
 114
 115    if (!tpm_find()) {
 116        error_setg(errp, "at most one TPM device is permitted");
 117        return;
 118    }
 119
 120    if (!s->be_driver) {
 121        error_setg(errp, "'tpmdev' property is required");
 122        return;
 123    }
 124    if (s->irq_num > 15) {
 125        error_setg(errp, "IRQ %d is outside valid range of 0 to 15",
 126                   s->irq_num);
 127        return;
 128    }
 129
 130    isa_init_irq(ISA_DEVICE(dev), &s->irq, s->irq_num);
 131
 132    memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
 133                                TPM_TIS_ADDR_BASE, &s->mmio);
 134
 135    if (s->ppi_enabled) {
 136        tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)),
 137                     TPM_PPI_ADDR_BASE, OBJECT(dev));
 138    }
 139}
 140
 141static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
 142{
 143    DeviceClass *dc = DEVICE_CLASS(klass);
 144    TPMIfClass *tc = TPM_IF_CLASS(klass);
 145
 146    device_class_set_props(dc, tpm_tis_isa_properties);
 147    dc->vmsd  = &vmstate_tpm_tis_isa;
 148    tc->model = TPM_MODEL_TPM_TIS;
 149    dc->realize = tpm_tis_isa_realizefn;
 150    dc->reset = tpm_tis_isa_reset;
 151    tc->request_completed = tpm_tis_isa_request_completed;
 152    tc->get_version = tpm_tis_isa_get_tpm_version;
 153    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
 154}
 155
 156static const TypeInfo tpm_tis_isa_info = {
 157    .name = TYPE_TPM_TIS_ISA,
 158    .parent = TYPE_ISA_DEVICE,
 159    .instance_size = sizeof(TPMStateISA),
 160    .instance_init = tpm_tis_isa_initfn,
 161    .class_init  = tpm_tis_isa_class_init,
 162    .interfaces = (InterfaceInfo[]) {
 163        { TYPE_TPM_IF },
 164        { }
 165    }
 166};
 167
 168static void tpm_tis_isa_register(void)
 169{
 170    type_register_static(&tpm_tis_isa_info);
 171}
 172
 173type_init(tpm_tis_isa_register)
 174