xref: /openbmc/qemu/include/sysemu/tpm.h (revision 7d87775f)
1 /*
2  * Public TPM functions
3  *
4  * Copyright (C) 2011-2013 IBM Corporation
5  *
6  * Authors:
7  *  Stefan Berger    <stefanb@us.ibm.com>
8  *
9  * This work is licensed under the terms of the GNU GPL, version 2 or later.
10  * See the COPYING file in the top-level directory.
11  */
12 #ifndef QEMU_TPM_H
13 #define QEMU_TPM_H
14 
15 #include "qapi/qapi-types-tpm.h"
16 #include "qom/object.h"
17 
18 #ifdef CONFIG_TPM
19 
20 int tpm_config_parse(QemuOptsList *opts_list, const char *optstr);
21 int tpm_init(void);
22 void tpm_cleanup(void);
23 
24 typedef enum TPMVersion {
25     TPM_VERSION_UNSPEC = 0,
26     TPM_VERSION_1_2 = 1,
27     TPM_VERSION_2_0 = 2,
28 } TPMVersion;
29 
30 #define TYPE_TPM_IF "tpm-if"
31 typedef struct TPMIfClass TPMIfClass;
32 DECLARE_CLASS_CHECKERS(TPMIfClass, TPM_IF,
33                        TYPE_TPM_IF)
34 #define TPM_IF(obj)                             \
35     INTERFACE_CHECK(TPMIf, (obj), TYPE_TPM_IF)
36 
37 typedef struct TPMIf TPMIf;
38 
39 struct TPMIfClass {
40     InterfaceClass parent_class;
41 
42     enum TpmModel model;
43     void (*request_completed)(TPMIf *obj, int ret);
44     enum TPMVersion (*get_version)(TPMIf *obj);
45 };
46 
47 #define TYPE_TPM_TIS_ISA            "tpm-tis"
48 #define TYPE_TPM_TIS_SYSBUS         "tpm-tis-device"
49 #define TYPE_TPM_CRB                "tpm-crb"
50 #define TYPE_TPM_SPAPR              "tpm-spapr"
51 #define TYPE_TPM_TIS_I2C            "tpm-tis-i2c"
52 
53 #define TPM_IS_TIS_ISA(chr)                         \
54     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_ISA)
55 #define TPM_IS_TIS_SYSBUS(chr)                      \
56     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_SYSBUS)
57 #define TPM_IS_CRB(chr)                             \
58     object_dynamic_cast(OBJECT(chr), TYPE_TPM_CRB)
59 #define TPM_IS_SPAPR(chr)                           \
60     object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR)
61 #define TPM_IS_TIS_I2C(chr)                      \
62     object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS_I2C)
63 
64 /* returns NULL unless there is exactly one TPM device */
65 static inline TPMIf *tpm_find(void)
66 {
67     Object *obj = object_resolve_path_type("", TYPE_TPM_IF, NULL);
68 
69     return TPM_IF(obj);
70 }
71 
72 static inline TPMVersion tpm_get_version(TPMIf *ti)
73 {
74     if (!ti) {
75         return TPM_VERSION_UNSPEC;
76     }
77 
78     return TPM_IF_GET_CLASS(ti)->get_version(ti);
79 }
80 
81 #else /* CONFIG_TPM */
82 
83 #define tpm_init()  (0)
84 #define tpm_cleanup()
85 
86 /* needed for an alignment check in non-tpm code */
87 static inline Object *TPM_IS_CRB(Object *obj)
88 {
89      return NULL;
90 }
91 
92 #endif /* CONFIG_TPM */
93 
94 #endif /* QEMU_TPM_H */
95