xref: /openbmc/linux/drivers/char/tpm/Kconfig (revision ec8f24b7)
1# SPDX-License-Identifier: GPL-2.0-only
2#
3# TPM device configuration
4#
5
6menuconfig TCG_TPM
7	tristate "TPM Hardware Support"
8	depends on HAS_IOMEM
9	imply SECURITYFS
10	select CRYPTO
11	select CRYPTO_HASH_INFO
12	---help---
13	  If you have a TPM security chip in your system, which
14	  implements the Trusted Computing Group's specification,
15	  say Yes and it will be accessible from within Linux.  For
16	  more information see <http://www.trustedcomputinggroup.org>.
17	  An implementation of the Trusted Software Stack (TSS), the
18	  userspace enablement piece of the specification, can be
19	  obtained at: <http://sourceforge.net/projects/trousers>.  To
20	  compile this driver as a module, choose M here; the module
21	  will be called tpm. If unsure, say N.
22	  Notes:
23	  1) For more TPM drivers enable CONFIG_PNP, CONFIG_ACPI
24	  and CONFIG_PNPACPI.
25	  2) Without ACPI enabled, the BIOS event log won't be accessible,
26	  which is required to validate the PCR 0-7 values.
27
28if TCG_TPM
29
30config HW_RANDOM_TPM
31	bool "TPM HW Random Number Generator support"
32	depends on TCG_TPM && HW_RANDOM && !(TCG_TPM=y && HW_RANDOM=m)
33	default y
34	---help---
35	  This setting exposes the TPM's Random Number Generator as a hwrng
36	  device. This allows the kernel to collect randomness from the TPM at
37	  boot, and provides the TPM randomines in /dev/hwrng.
38
39	  If unsure, say Y.
40
41config TCG_TIS_CORE
42	tristate
43	---help---
44	TCG TIS TPM core driver. It implements the TPM TCG TIS logic and hooks
45	into the TPM kernel APIs. Physical layers will register against it.
46
47config TCG_TIS
48	tristate "TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface"
49	depends on X86 || OF
50	select TCG_TIS_CORE
51	---help---
52	  If you have a TPM security chip that is compliant with the
53	  TCG TIS 1.2 TPM specification (TPM1.2) or the TCG PTP FIFO
54	  specification (TPM2.0) say Yes and it will be accessible from
55	  within Linux. To compile this driver as a module, choose  M here;
56	  the module will be called tpm_tis.
57
58config TCG_TIS_SPI
59	tristate "TPM Interface Specification 1.3 Interface / TPM 2.0 FIFO Interface - (SPI)"
60	depends on SPI
61	select TCG_TIS_CORE
62	---help---
63	  If you have a TPM security chip which is connected to a regular,
64	  non-tcg SPI master (i.e. most embedded platforms) that is compliant with the
65	  TCG TIS 1.3 TPM specification (TPM1.2) or the TCG PTP FIFO
66	  specification (TPM2.0) say Yes and it will be accessible from
67	  within Linux. To compile this driver as a module, choose  M here;
68	  the module will be called tpm_tis_spi.
69
70config TCG_TIS_I2C_ATMEL
71	tristate "TPM Interface Specification 1.2 Interface (I2C - Atmel)"
72	depends on I2C
73	---help---
74	  If you have an Atmel I2C TPM security chip say Yes and it will be
75	  accessible from within Linux.
76	  To compile this driver as a module, choose M here; the module will
77	  be called tpm_tis_i2c_atmel.
78
79config TCG_TIS_I2C_INFINEON
80	tristate "TPM Interface Specification 1.2 Interface (I2C - Infineon)"
81	depends on I2C
82	---help---
83	  If you have a TPM security chip that is compliant with the
84	  TCG TIS 1.2 TPM specification and Infineon's I2C Protocol Stack
85	  Specification 0.20 say Yes and it will be accessible from within
86	  Linux.
87	  To compile this driver as a module, choose M here; the module
88	  will be called tpm_i2c_infineon.
89
90config TCG_TIS_I2C_NUVOTON
91	tristate "TPM Interface Specification 1.2 Interface (I2C - Nuvoton)"
92	depends on I2C
93	---help---
94	  If you have a TPM security chip with an I2C interface from
95	  Nuvoton Technology Corp. say Yes and it will be accessible
96	  from within Linux.
97	  To compile this driver as a module, choose M here; the module
98	  will be called tpm_i2c_nuvoton.
99
100config TCG_NSC
101	tristate "National Semiconductor TPM Interface"
102	depends on X86
103	---help---
104	  If you have a TPM security chip from National Semiconductor
105	  say Yes and it will be accessible from within Linux.  To
106	  compile this driver as a module, choose M here; the module
107	  will be called tpm_nsc.
108
109config TCG_ATMEL
110	tristate "Atmel TPM Interface"
111	depends on PPC64 || HAS_IOPORT_MAP
112	---help---
113	  If you have a TPM security chip from Atmel say Yes and it
114	  will be accessible from within Linux.  To compile this driver
115	  as a module, choose M here; the module will be called tpm_atmel.
116
117config TCG_INFINEON
118	tristate "Infineon Technologies TPM Interface"
119	depends on PNP
120	---help---
121	  If you have a TPM security chip from Infineon Technologies
122	  (either SLD 9630 TT 1.1 or SLB 9635 TT 1.2) say Yes and it
123	  will be accessible from within Linux.
124	  To compile this driver as a module, choose M here; the module
125	  will be called tpm_infineon.
126	  Further information on this driver and the supported hardware
127	  can be found at http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/
128
129config TCG_IBMVTPM
130	tristate "IBM VTPM Interface"
131	depends on PPC_PSERIES
132	---help---
133	  If you have IBM virtual TPM (VTPM) support say Yes and it
134	  will be accessible from within Linux.  To compile this driver
135	  as a module, choose M here; the module will be called tpm_ibmvtpm.
136
137config TCG_XEN
138	tristate "XEN TPM Interface"
139	depends on TCG_TPM && XEN
140	select XEN_XENBUS_FRONTEND
141	---help---
142	  If you want to make TPM support available to a Xen user domain,
143	  say Yes and it will be accessible from within Linux. See
144	  the manpages for xl, xl.conf, and docs/misc/vtpm.txt in
145	  the Xen source repository for more details.
146	  To compile this driver as a module, choose M here; the module
147	  will be called xen-tpmfront.
148
149config TCG_CRB
150	tristate "TPM 2.0 CRB Interface"
151	depends on ACPI
152	---help---
153	  If you have a TPM security chip that is compliant with the
154	  TCG CRB 2.0 TPM specification say Yes and it will be accessible
155	  from within Linux.  To compile this driver as a module, choose
156	  M here; the module will be called tpm_crb.
157
158config TCG_VTPM_PROXY
159	tristate "VTPM Proxy Interface"
160	depends on TCG_TPM
161	---help---
162	  This driver proxies for an emulated TPM (vTPM) running in userspace.
163	  A device /dev/vtpmx is provided that creates a device pair
164	  /dev/vtpmX and a server-side file descriptor on which the vTPM
165	  can receive commands.
166
167
168source "drivers/char/tpm/st33zp24/Kconfig"
169endif # TCG_TPM
170