[U-Boot] [PATCH 03/25] tpm: Add Kconfig options for TPMs

Simon Glass
2015-08-11T14:47:55Z

Add new Kconfig options for TPMs in preparation for moving boards to use
Kconfig for TPM configuration.

Signed-off-by: Simon Glass <sjg@chromium.org>
---

common/Kconfig | 12 ++++++++++++
drivers/tpm/Kconfig | 52 ++++++++++++++++++++++++++++++++++++++++++++++++++++
lib/Kconfig | 10 ++++++++++
3 files changed, 74 insertions(+)

diff --git a/common/Kconfig b/common/Kconfig
index 40cd69e..05faae9 100644
--- a/common/Kconfig
+++ b/common/Kconfig
@@ -618,4 +618,16 @@ config CMD_REGULATOR

endmenu

+menu "Security commands"
+config CMD_TPM
+ bool "Enable the 'tpm' command"
+ depends on TPM
+ help
+ This provides a means to talk to a TPM from the command line. A wide
+ range of commands if provided - see 'tpm help' for details. The
+ command requires a suitable TPM on your board and the correct driver
+ must be enabled.
+
+endmenu
+
endmenu
diff --git a/drivers/tpm/Kconfig b/drivers/tpm/Kconfig
index f408b8a..993d2d7 100644
--- a/drivers/tpm/Kconfig
+++ b/drivers/tpm/Kconfig
@@ -1,7 +1,59 @@
config TPM_TIS_SANDBOX
bool "Enable sandbox TPM driver"
+ depends on SANDBOX
help
This driver emulates a TPM, providing access to base functions
such as reading and writing TPM private data. This is enough to
support Chrome OS verified boot. Extend functionality is not
implemented.
+
+config TPM_ATMEL_TWI
+ bool "Enable Atmel TWI TPM device driver"
+ depends on TPM
+ help
+ This driver supports an Atmel TPM device connected on the I2C bus.
+ The usual tpm operations and the 'tpm' command can be used to talk
+ to the device using the standard TPM Interface Specification (TIS)
+ protocol
+
+config TPM_TIS_I2C
+ bool "Enable support for Infineon SLB9635/45 TPMs on I2C"
+ depends on TPM && DM_I2C
+ help
+ This driver supports Infineon TPM devices connected on the I2C bus.
+ The usual tpm operations and the 'tpm' command can be used to talk
+ to the device using the standard TPM Interface Specification (TIS)
+ protocol
+
+config TPM_TIS_I2C_BURST_LIMITATION
+ bool "Enable I2C burst length limitation"
+ depends on TPM_TIS_I2C
+ help
+ Some broken TPMs have a limitation on the number of bytes they can
+ receive in one message. Enable this option to allow you to set this
+ option. The can allow a broken TPM to be used by splitting messages
+ into separate pieces.
+
+config TPM_TIS_I2C_BURST_LIMITATION_LEN
+ int "Length"
+ depends on TPM_TIS_I2C_BURST_LIMITATION
+ help
+ Use this to set the burst limitation length
+
+config TPM_TIS_LPC
+ bool "Enable support for Infineon SLB9635/45 TPMs on LPC"
+ depends on TPM && X86
+ help
+ This driver supports Infineon TPM devices connected on the I2C bus.
+ The usual tpm operations and the 'tpm' command can be used to talk
+ to the device using the standard TPM Interface Specification (TIS)
+ protocol
+
+config TPM_AUTH_SESSIONS
+ bool "Enable TPM authentication session support"
+ depends on TPM
+ help
+ Enable support for authorised (AUTH1) commands as specified in the
+ TCG Main Specification 1.2. OIAP-authorised versions of the commands
+ TPM_LoadKey2 and TPM_GetPubKey are provided. Both features are
+ available using the 'tpm' command, too.
diff --git a/lib/Kconfig b/lib/Kconfig
index 884218a..0673072 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -54,6 +54,16 @@ source lib/dhry/Kconfig

source lib/rsa/Kconfig

+config TPM
+ bool "Trusted Platform Module (TPM) Support"
+ help
+ This enables support for TPMs which can be used to provide security
+ features for your board. The TPM can be connected via LPC or I2C
+ and a sandbox TPM is provided for testing purposes. Use the 'tpm'
+ command to interactive the TPM. Driver model support is provided
+ for the low-level TPM interface, but only one TPM is supported at
+ a time by the TPM library.
+
menu "Hashing Support"

config SHA1
--
2.5.0.rc2.392.g76e840b