u-boot/cmd/tpm-user-utils.h
Ilias Apalodimas e663b2ff4b tpm: Add 'tpm autostart' shell command
For a TPM device to be operational we need to initialize it and
perform its startup sequence.  The 'tpm init' command currently calls
tpm_init() which ends up calling the ->open() per-device callback and
performs the initial hardware configuration as well as requesting
locality 0 for the caller.  There no code that currently calls
tpm_init() without following up with a tpm_startup() and tpm_self_test_full()
or tpm_continue_self_test().

So let's add a 'tpm autostart' command and call tpm_auto_start() which
leaves the device in an operational state.

It's worth noting that calling tpm_init() only, doesn't allow a someone
to use the TPM since the startup sequence is mandatory. We always
repeat the pattern of calling
- tpm_init()
- tpm_startup()
- tpm_self_test_full() or tpm_continue_self_test()

Reviewed-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
2023-06-13 08:51:07 +03:00

29 lines
1.2 KiB
C

/* SPDX-License-Identifier: GPL-2.0+ */
/*
* Copyright (c) 2013 The Chromium OS Authors.
* Coypright (c) 2013 Guntermann & Drunck GmbH
*/
#ifndef __TPM_USER_UTILS_H
#define __TPM_USER_UTILS_H
void print_byte_string(u8 *data, size_t count);
void *parse_byte_string(char *bytes, u8 *data, size_t *count_ptr);
int report_return_code(int return_code);
int type_string_get_num_values(const char *type_str);
size_t type_string_get_space_size(const char *type_str);
void *type_string_alloc(const char *type_str, u32 *count);
int type_string_pack(const char *type_str, char * const values[], u8 *data);
int type_string_write_vars(const char *type_str, u8 *data, char * const vars[]);
int get_tpm(struct udevice **devp);
int do_tpm_device(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
int do_tpm_init(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
int do_tpm_autostart(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
int do_tpm_info(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
int do_tpm_report_state(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[]);
int do_tpm(struct cmd_tbl *cmdtp, int flag, int argc, char *const argv[]);
#endif /* __TPM_USER_UTILS_H */