2020-03-05 17:51:42 +01:00
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/*
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* tpm_tis_isa.c - QEMU's TPM TIS ISA 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, Familiy 2.0, Revision 00.43
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*/
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#include "qemu/osdep.h"
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#include "hw/isa/isa.h"
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#include "hw/qdev-properties.h"
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#include "migration/vmstate.h"
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2020-06-12 10:54:38 +02:00
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#include "hw/acpi/tpm.h"
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2020-06-12 10:54:42 +02:00
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#include "tpm_prop.h"
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2020-03-05 17:51:42 +01:00
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#include "tpm_tis.h"
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typedef struct TPMStateISA {
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/*< private >*/
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ISADevice parent_obj;
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/*< public >*/
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TPMState state; /* not a QOM object */
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} TPMStateISA;
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#define TPM_TIS_ISA(obj) OBJECT_CHECK(TPMStateISA, (obj), TYPE_TPM_TIS_ISA)
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static int tpm_tis_pre_save_isa(void *opaque)
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{
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TPMStateISA *isadev = opaque;
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return tpm_tis_pre_save(&isadev->state);
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}
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static const VMStateDescription vmstate_tpm_tis_isa = {
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.name = "tpm-tis",
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.version_id = 0,
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.pre_save = tpm_tis_pre_save_isa,
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.fields = (VMStateField[]) {
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VMSTATE_BUFFER(state.buffer, TPMStateISA),
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VMSTATE_UINT16(state.rw_offset, TPMStateISA),
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VMSTATE_UINT8(state.active_locty, TPMStateISA),
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VMSTATE_UINT8(state.aborting_locty, TPMStateISA),
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VMSTATE_UINT8(state.next_locty, TPMStateISA),
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VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0,
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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_isa_request_completed(TPMIf *ti, int ret)
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{
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TPMStateISA *isadev = TPM_TIS_ISA(ti);
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TPMState *s = &isadev->state;
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tpm_tis_request_completed(s, ret);
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}
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static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti)
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{
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TPMStateISA *isadev = TPM_TIS_ISA(ti);
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TPMState *s = &isadev->state;
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return tpm_tis_get_tpm_version(s);
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}
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static void tpm_tis_isa_reset(DeviceState *dev)
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{
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TPMStateISA *isadev = TPM_TIS_ISA(dev);
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TPMState *s = &isadev->state;
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return tpm_tis_reset(s);
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}
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static Property tpm_tis_isa_properties[] = {
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DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ),
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DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver),
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DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void tpm_tis_isa_initfn(Object *obj)
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{
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TPMStateISA *isadev = TPM_TIS_ISA(obj);
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TPMState *s = &isadev->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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}
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static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp)
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{
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TPMStateISA *isadev = TPM_TIS_ISA(dev);
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TPMState *s = &isadev->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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if (s->irq_num > 15) {
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error_setg(errp, "IRQ %d is outside valid range of 0 to 15",
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s->irq_num);
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return;
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}
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isa_init_irq(ISA_DEVICE(dev), &s->irq, s->irq_num);
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memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
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TPM_TIS_ADDR_BASE, &s->mmio);
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if (s->ppi_enabled) {
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tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)),
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TPM_PPI_ADDR_BASE, OBJECT(dev));
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}
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}
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static void tpm_tis_isa_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_isa_properties);
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dc->vmsd = &vmstate_tpm_tis_isa;
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tc->model = TPM_MODEL_TPM_TIS;
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dc->realize = tpm_tis_isa_realizefn;
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dc->reset = tpm_tis_isa_reset;
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tc->request_completed = tpm_tis_isa_request_completed;
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tc->get_version = tpm_tis_isa_get_tpm_version;
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}
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static const TypeInfo tpm_tis_isa_info = {
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.name = TYPE_TPM_TIS_ISA,
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.parent = TYPE_ISA_DEVICE,
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.instance_size = sizeof(TPMStateISA),
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.instance_init = tpm_tis_isa_initfn,
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.class_init = tpm_tis_isa_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_isa_register(void)
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{
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type_register_static(&tpm_tis_isa_info);
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}
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type_init(tpm_tis_isa_register)
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