u-boot.git/lib/tpm_api.c, branch next

tpm: add TPM2_Shutdown command

2025-01-28T06:58:41+00:00

TPM2_shutdown command is sharing same structure and logics with
TPM2_startup, thus this patch extends the existing startup APIs and
cmd functions to support shutdown instead of created new ones.

Signed-off-by: Raymond Mao 
Reviewed-by: Ilias Apalodimas 
Signed-off-by: Ilias Apalodimas

lib: Remove inclusion from these files

2023-12-21T13:54:37+00:00

After some header file cleanups to add missing include files, remove
common.h from all files in the lib directory. This primarily means just
dropping the line but in a few cases we need to add in other header
files now.

Reviewed-by: Simon Glass 
Signed-off-by: Tom Rini

tpm: Implement tpm_auto_start() for TPMv1.2

2023-02-28T07:44:33+00:00

Add an implementation of this, moving the common call to tpm_init() up
into the common API implementation.

Add a test.

Reviewed-by: Ilias Apalodimas 
Signed-off-by: Simon Glass 
Signed-off-by: Ilias Apalodimas

tpm: add a function that performs selftest + startup

2023-02-28T07:44:19+00:00

As described in [0] if a command requires use of an untested algorithm
or functional module, the TPM performs the test and then completes the
command actions.

Since we don't check for TPM_RC_NEEDS_TEST (which is the return code of
the TPM in that case) and even if we would, it would complicate our TPM
code for no apparent reason,  add a wrapper function that performs both
the selftest and the startup sequence of the TPM.

It's worth noting that this is implemented on TPMv2.0.  The code for
1.2 would look similar,  but I don't have a device available to test.

[0]
https://trustedcomputinggroup.org/wp-content/uploads/TPM-Rev-2.0-Part-1-Architecture-01.07-2014-03-13.pdf
§12.3 Self-test modes

Reviewed-by: Simon Glass 
Signed-off-by: Ilias Apalodimas

tpm: Require a digest source when extending the PCR

2022-09-03T13:53:58+00:00

This feature is used for measured boot, so we can add a log entry to the
TCPA with some information about where the digest comes from. It is not
currently supported in the TPM drivers, but add it to the API so that
code which expects it can signal its request.

Signed-off-by: Simon Glass 
Reviewed-by: Ilias Apalodimas 
Signed-off-by: Ilias Apalodimas

tpm: rng: Add driver model interface for TPM RNG device

2022-08-02T20:50:02+00:00

The TPM device has a builtin random number generator(RNG)
functionality. Expose the RNG functions of the TPM device to the
driver model so that they can be used by the EFI_RNG_PROTOCOL if the
protocol is installed.

Also change the function arguments and return type of the random
number functions to comply with the driver model api.

Signed-off-by: Sughosh Ganu 
Reviewed-by: Ilias Apalodimas 
Signed-off-by: Ilias Apalodimas

tpm: Export the TPM-version functions

2022-08-02T20:50:02+00:00

These functions should really be available outside the TPM code, so that
other callers can find out which version the TPM is. Rename them to have
a tpm_ prefix() and add them to the header file.

Signed-off-by: Simon Glass 
Reviewed-by: Ilias Apalodimas 
Signed-off-by: Ilias Apalodimas

tpm: Add TPM2 support for write_lock

2021-03-02T20:53:37+00:00

Implement this API function for TPM2.

Signed-off-by: Simon Glass 
Acked-by: Ilias Apalodimas

tpm: Add TPM2 support for read/write values

2021-03-02T20:53:37+00:00

Implement this API function for TPM2.

Signed-off-by: Simon Glass 
Acked-by: Ilias Apalodimas

tpm: Add a basic API implementation for TPMv2

2021-03-02T20:53:37+00:00

Add support for TPMv2 versions of API functions. So far this is not
complete as the standard is quite large, but it implements everything
currently available for TPMv2 in U-Boot.

Signed-off-by: Simon Glass 
Acked-by: Ilias Apalodimas