cachepc-qemu

Fork of AMDESE/qemu with changes for cachepc side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-qemu
Log | Files | Refs | Submodules | LICENSE | sfeed.txt

tpm_tis_sysbus.c (4683B)

      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)