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