qemu

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/*
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 * tpm_tis_sysbus.c - QEMU's TPM TIS SYSBUS Device
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 *
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 * Copyright (C) 2006,2010-2013 IBM Corporation
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 *
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 * Authors:
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 *  Stefan Berger <stefanb@us.ibm.com>
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 *  David Safford <safford@us.ibm.com>
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 *
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 * Xen 4 support: Andrease Niederl <andreas.niederl@iaik.tugraz.at>
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 *
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 * This work is licensed under the terms of the GNU GPL, version 2 or later.
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 * See the COPYING file in the top-level directory.
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 *
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 * Implementation of the TIS interface according to specs found at
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 * http://www.trustedcomputinggroup.org. This implementation currently
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 * supports version 1.3, 21 March 2013
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 * In the developers menu choose the PC Client section then find the TIS
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 * specification.
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 *
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 * TPM TIS for TPM 2 implementation following TCG PC Client Platform
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 * TPM Profile (PTP) Specification, Family 2.0, Revision 00.43
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 */
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#include "qemu/osdep.h"
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#include "hw/qdev-properties.h"
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#include "migration/vmstate.h"
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#include "hw/acpi/tpm.h"
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#include "tpm_prop.h"
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#include "hw/sysbus.h"
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#include "tpm_tis.h"
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#include "qom/object.h"
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struct TPMStateSysBus {
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    /*< private >*/
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    SysBusDevice parent_obj;
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    /*< public >*/
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    TPMState state; /* not a QOM object */
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};
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OBJECT_DECLARE_SIMPLE_TYPE(TPMStateSysBus, TPM_TIS_SYSBUS)
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static int tpm_tis_pre_save_sysbus(void *opaque)
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{
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    TPMStateSysBus *sbdev = opaque;
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    return tpm_tis_pre_save(&sbdev->state);
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}
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static const VMStateDescription vmstate_tpm_tis_sysbus = {
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    .name = "tpm-tis",
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    .version_id = 0,
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    .pre_save  = tpm_tis_pre_save_sysbus,
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    .fields = (const VMStateField[]) {
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        VMSTATE_BUFFER(state.buffer, TPMStateSysBus),
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        VMSTATE_UINT16(state.rw_offset, TPMStateSysBus),
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        VMSTATE_UINT8(state.active_locty, TPMStateSysBus),
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        VMSTATE_UINT8(state.aborting_locty, TPMStateSysBus),
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        VMSTATE_UINT8(state.next_locty, TPMStateSysBus),
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        VMSTATE_STRUCT_ARRAY(state.loc, TPMStateSysBus, TPM_TIS_NUM_LOCALITIES,
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                             0, vmstate_locty, TPMLocality),
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        VMSTATE_END_OF_LIST()
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    }
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};
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static void tpm_tis_sysbus_request_completed(TPMIf *ti, int ret)
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{
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    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
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    TPMState *s = &sbdev->state;
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    tpm_tis_request_completed(s, ret);
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}
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static enum TPMVersion tpm_tis_sysbus_get_tpm_version(TPMIf *ti)
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{
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    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(ti);
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    TPMState *s = &sbdev->state;
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    return tpm_tis_get_tpm_version(s);
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}
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static void tpm_tis_sysbus_reset(DeviceState *dev)
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{
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    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
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    TPMState *s = &sbdev->state;
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    return tpm_tis_reset(s);
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}
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static Property tpm_tis_sysbus_properties[] = {
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    DEFINE_PROP_UINT32("irq", TPMStateSysBus, state.irq_num, TPM_TIS_IRQ),
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    DEFINE_PROP_TPMBE("tpmdev", TPMStateSysBus, state.be_driver),
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    DEFINE_PROP_END_OF_LIST(),
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};
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static void tpm_tis_sysbus_initfn(Object *obj)
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{
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    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(obj);
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    TPMState *s = &sbdev->state;
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    memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops,
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                          s, "tpm-tis-mmio",
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                          TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT);
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    sysbus_init_mmio(SYS_BUS_DEVICE(obj), &s->mmio);
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    sysbus_init_irq(SYS_BUS_DEVICE(obj), &s->irq);
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}
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static void tpm_tis_sysbus_realizefn(DeviceState *dev, Error **errp)
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{
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    TPMStateSysBus *sbdev = TPM_TIS_SYSBUS(dev);
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    TPMState *s = &sbdev->state;
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    if (!tpm_find()) {
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        error_setg(errp, "at most one TPM device is permitted");
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        return;
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    }
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    if (!s->be_driver) {
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        error_setg(errp, "'tpmdev' property is required");
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        return;
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    }
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}
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static void tpm_tis_sysbus_class_init(ObjectClass *klass, void *data)
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{
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    DeviceClass *dc = DEVICE_CLASS(klass);
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    TPMIfClass *tc = TPM_IF_CLASS(klass);
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    device_class_set_props(dc, tpm_tis_sysbus_properties);
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    dc->vmsd  = &vmstate_tpm_tis_sysbus;
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    tc->model = TPM_MODEL_TPM_TIS;
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    dc->realize = tpm_tis_sysbus_realizefn;
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    dc->user_creatable = true;
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    dc->reset = tpm_tis_sysbus_reset;
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    tc->request_completed = tpm_tis_sysbus_request_completed;
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    tc->get_version = tpm_tis_sysbus_get_tpm_version;
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    set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static const TypeInfo tpm_tis_sysbus_info = {
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    .name = TYPE_TPM_TIS_SYSBUS,
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    .parent = TYPE_SYS_BUS_DEVICE,
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    .instance_size = sizeof(TPMStateSysBus),
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    .instance_init = tpm_tis_sysbus_initfn,
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    .class_init  = tpm_tis_sysbus_class_init,
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    .interfaces = (InterfaceInfo[]) {
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        { TYPE_TPM_IF },
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        { }
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    }
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};
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static void tpm_tis_sysbus_register(void)
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{
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    type_register_static(&tpm_tis_sysbus_info);
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}
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type_init(tpm_tis_sysbus_register)
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