Merge remote-tracking branch 'remotes/maxreitz/tags/pull-block-2020-07-28' into staging
[qemu.git] / hw / tpm / tpm_tis_isa.c
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
33 typedef struct TPMStateISA {
34 /*< private >*/
35 ISADevice parent_obj;
36
37 /*< public >*/
38 TPMState state; /* not a QOM object */
39 } TPMStateISA;
40
41 #define TPM_TIS_ISA(obj) OBJECT_CHECK(TPMStateISA, (obj), TYPE_TPM_TIS_ISA)
42
43 static int tpm_tis_pre_save_isa(void *opaque)
44 {
45 TPMStateISA *isadev = opaque;
46
47 return tpm_tis_pre_save(&isadev->state);
48 }
49
50 static const VMStateDescription vmstate_tpm_tis_isa = {
51 .name = "tpm-tis",
52 .version_id = 0,
53 .pre_save = tpm_tis_pre_save_isa,
54 .fields = (VMStateField[]) {
55 VMSTATE_BUFFER(state.buffer, TPMStateISA),
56 VMSTATE_UINT16(state.rw_offset, TPMStateISA),
57 VMSTATE_UINT8(state.active_locty, TPMStateISA),
58 VMSTATE_UINT8(state.aborting_locty, TPMStateISA),
59 VMSTATE_UINT8(state.next_locty, TPMStateISA),
60
61 VMSTATE_STRUCT_ARRAY(state.loc, TPMStateISA, TPM_TIS_NUM_LOCALITIES, 0,
62 vmstate_locty, TPMLocality),
63
64 VMSTATE_END_OF_LIST()
65 }
66 };
67
68 static void tpm_tis_isa_request_completed(TPMIf *ti, int ret)
69 {
70 TPMStateISA *isadev = TPM_TIS_ISA(ti);
71 TPMState *s = &isadev->state;
72
73 tpm_tis_request_completed(s, ret);
74 }
75
76 static enum TPMVersion tpm_tis_isa_get_tpm_version(TPMIf *ti)
77 {
78 TPMStateISA *isadev = TPM_TIS_ISA(ti);
79 TPMState *s = &isadev->state;
80
81 return tpm_tis_get_tpm_version(s);
82 }
83
84 static void tpm_tis_isa_reset(DeviceState *dev)
85 {
86 TPMStateISA *isadev = TPM_TIS_ISA(dev);
87 TPMState *s = &isadev->state;
88
89 return tpm_tis_reset(s);
90 }
91
92 static Property tpm_tis_isa_properties[] = {
93 DEFINE_PROP_UINT32("irq", TPMStateISA, state.irq_num, TPM_TIS_IRQ),
94 DEFINE_PROP_TPMBE("tpmdev", TPMStateISA, state.be_driver),
95 DEFINE_PROP_BOOL("ppi", TPMStateISA, state.ppi_enabled, true),
96 DEFINE_PROP_END_OF_LIST(),
97 };
98
99 static void tpm_tis_isa_initfn(Object *obj)
100 {
101 TPMStateISA *isadev = TPM_TIS_ISA(obj);
102 TPMState *s = &isadev->state;
103
104 memory_region_init_io(&s->mmio, obj, &tpm_tis_memory_ops,
105 s, "tpm-tis-mmio",
106 TPM_TIS_NUM_LOCALITIES << TPM_TIS_LOCALITY_SHIFT);
107 }
108
109 static void tpm_tis_isa_realizefn(DeviceState *dev, Error **errp)
110 {
111 TPMStateISA *isadev = TPM_TIS_ISA(dev);
112 TPMState *s = &isadev->state;
113
114 if (!tpm_find()) {
115 error_setg(errp, "at most one TPM device is permitted");
116 return;
117 }
118
119 if (!s->be_driver) {
120 error_setg(errp, "'tpmdev' property is required");
121 return;
122 }
123 if (s->irq_num > 15) {
124 error_setg(errp, "IRQ %d is outside valid range of 0 to 15",
125 s->irq_num);
126 return;
127 }
128
129 isa_init_irq(ISA_DEVICE(dev), &s->irq, s->irq_num);
130
131 memory_region_add_subregion(isa_address_space(ISA_DEVICE(dev)),
132 TPM_TIS_ADDR_BASE, &s->mmio);
133
134 if (s->ppi_enabled) {
135 tpm_ppi_init(&s->ppi, isa_address_space(ISA_DEVICE(dev)),
136 TPM_PPI_ADDR_BASE, OBJECT(dev));
137 }
138 }
139
140 static void tpm_tis_isa_class_init(ObjectClass *klass, void *data)
141 {
142 DeviceClass *dc = DEVICE_CLASS(klass);
143 TPMIfClass *tc = TPM_IF_CLASS(klass);
144
145 device_class_set_props(dc, tpm_tis_isa_properties);
146 dc->vmsd = &vmstate_tpm_tis_isa;
147 tc->model = TPM_MODEL_TPM_TIS;
148 dc->realize = tpm_tis_isa_realizefn;
149 dc->reset = tpm_tis_isa_reset;
150 tc->request_completed = tpm_tis_isa_request_completed;
151 tc->get_version = tpm_tis_isa_get_tpm_version;
152 }
153
154 static const TypeInfo tpm_tis_isa_info = {
155 .name = TYPE_TPM_TIS_ISA,
156 .parent = TYPE_ISA_DEVICE,
157 .instance_size = sizeof(TPMStateISA),
158 .instance_init = tpm_tis_isa_initfn,
159 .class_init = tpm_tis_isa_class_init,
160 .interfaces = (InterfaceInfo[]) {
161 { TYPE_TPM_IF },
162 { }
163 }
164 };
165
166 static void tpm_tis_isa_register(void)
167 {
168 type_register_static(&tpm_tis_isa_info);
169 }
170
171 type_init(tpm_tis_isa_register)