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_SPI_CR50
71	bool "Cr50 SPI Interface"
72	depends on TCG_TIS_SPI
73	help
74	  If you have a H1 secure module running Cr50 firmware on SPI bus,
75	  say Yes and it will be accessible from within Linux.
76
77config TCG_TIS_SYNQUACER
78	tristate "TPM Interface Specification 1.2 Interface / TPM 2.0 FIFO Interface (MMIO - SynQuacer)"
79	depends on ARCH_SYNQUACER || COMPILE_TEST
80	select TCG_TIS_CORE
81	help
82	  If you have a TPM security chip that is compliant with the
83	  TCG TIS 1.2 TPM specification (TPM1.2) or the TCG PTP FIFO
84	  specification (TPM2.0) say Yes and it will be accessible from
85	  within Linux on Socionext SynQuacer platform.
86	  To compile this driver as a module, choose  M here;
87	  the module will be called tpm_tis_synquacer.
88
89config TCG_TIS_I2C_CR50
90	tristate "TPM Interface Specification 2.0 Interface (I2C - CR50)"
91	depends on I2C
92	help
93	  This is a driver for the Google cr50 I2C TPM interface which is a
94	  custom microcontroller and requires a custom i2c protocol interface
95	  to handle the limitations of the hardware.  To compile this driver
96	  as a module, choose M here; the module will be called tcg_tis_i2c_cr50.
97
98config TCG_TIS_I2C_ATMEL
99	tristate "TPM Interface Specification 1.2 Interface (I2C - Atmel)"
100	depends on I2C
101	help
102	  If you have an Atmel I2C TPM security chip say Yes and it will be
103	  accessible from within Linux.
104	  To compile this driver as a module, choose M here; the module will
105	  be called tpm_tis_i2c_atmel.
106
107config TCG_TIS_I2C_INFINEON
108	tristate "TPM Interface Specification 1.2 Interface (I2C - Infineon)"
109	depends on I2C
110	help
111	  If you have a TPM security chip that is compliant with the
112	  TCG TIS 1.2 TPM specification and Infineon's I2C Protocol Stack
113	  Specification 0.20 say Yes and it will be accessible from within
114	  Linux.
115	  To compile this driver as a module, choose M here; the module
116	  will be called tpm_i2c_infineon.
117
118config TCG_TIS_I2C_NUVOTON
119	tristate "TPM Interface Specification 1.2 Interface (I2C - Nuvoton)"
120	depends on I2C
121	help
122	  If you have a TPM security chip with an I2C interface from
123	  Nuvoton Technology Corp. say Yes and it will be accessible
124	  from within Linux.
125	  To compile this driver as a module, choose M here; the module
126	  will be called tpm_i2c_nuvoton.
127
128config TCG_NSC
129	tristate "National Semiconductor TPM Interface"
130	depends on X86
131	help
132	  If you have a TPM security chip from National Semiconductor
133	  say Yes and it will be accessible from within Linux.  To
134	  compile this driver as a module, choose M here; the module
135	  will be called tpm_nsc.
136
137config TCG_ATMEL
138	tristate "Atmel TPM Interface"
139	depends on PPC64 || HAS_IOPORT_MAP
140	help
141	  If you have a TPM security chip from Atmel say Yes and it
142	  will be accessible from within Linux.  To compile this driver
143	  as a module, choose M here; the module will be called tpm_atmel.
144
145config TCG_INFINEON
146	tristate "Infineon Technologies TPM Interface"
147	depends on PNP
148	help
149	  If you have a TPM security chip from Infineon Technologies
150	  (either SLD 9630 TT 1.1 or SLB 9635 TT 1.2) say Yes and it
151	  will be accessible from within Linux.
152	  To compile this driver as a module, choose M here; the module
153	  will be called tpm_infineon.
154	  Further information on this driver and the supported hardware
155	  can be found at http://www.trust.rub.de/projects/linux-device-driver-infineon-tpm/
156
157config TCG_IBMVTPM
158	tristate "IBM VTPM Interface"
159	depends on PPC_PSERIES
160	help
161	  If you have IBM virtual TPM (VTPM) support say Yes and it
162	  will be accessible from within Linux.  To compile this driver
163	  as a module, choose M here; the module will be called tpm_ibmvtpm.
164
165config TCG_XEN
166	tristate "XEN TPM Interface"
167	depends on TCG_TPM && XEN
168	select XEN_XENBUS_FRONTEND
169	help
170	  If you want to make TPM support available to a Xen user domain,
171	  say Yes and it will be accessible from within Linux. See
172	  the manpages for xl, xl.conf, and docs/misc/vtpm.txt in
173	  the Xen source repository for more details.
174	  To compile this driver as a module, choose M here; the module
175	  will be called xen-tpmfront.
176
177config TCG_CRB
178	tristate "TPM 2.0 CRB Interface"
179	depends on ACPI
180	help
181	  If you have a TPM security chip that is compliant with the
182	  TCG CRB 2.0 TPM specification say Yes and it will be accessible
183	  from within Linux.  To compile this driver as a module, choose
184	  M here; the module will be called tpm_crb.
185
186config TCG_VTPM_PROXY
187	tristate "VTPM Proxy Interface"
188	depends on TCG_TPM
189	help
190	  This driver proxies for an emulated TPM (vTPM) running in userspace.
191	  A device /dev/vtpmx is provided that creates a device pair
192	  /dev/vtpmX and a server-side file descriptor on which the vTPM
193	  can receive commands.
194
195config TCG_FTPM_TEE
196	tristate "TEE based fTPM Interface"
197	depends on TEE && OPTEE
198	help
199	  This driver proxies for firmware TPM running in TEE.
200
201source "drivers/char/tpm/st33zp24/Kconfig"
202endif # TCG_TPM
203