tspi.c File Reference

#include <console/console.h>
#include <security/tpm/tspi/crtm.h>
#include <security/tpm/tspi.h>
#include <security/tpm/tss.h>
#include <assert.h>
#include <security/vboot/misc.h>
#include <vb2_api.h>
#include <vb2_sha.h>

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Functions
static uint32_t	tpm_setup_s3_helper (void)
static uint32_t	tpm_setup_epilogue (uint32_t result)
static int	tspi_tpm_is_setup (void)
uint32_t	tpm_setup (int s3flag)
	Start the TPM and establish the root of trust. More...
uint32_t	tpm_clear_and_reenable (void)
	Issue a TPM_Clear and re-enable/reactivate the TPM. More...
uint32_t	tpm_extend_pcr (int pcr, enum vb2_hash_algorithm digest_algo, const uint8_t *digest, size_t digest_len, const char *name)
	Ask vboot for a digest and extend a TPM PCR with it. More...

Variables
static int	tpm_is_setup

Function Documentation

tpm_clear_and_reenable()

uint32_t tpm_clear_and_reenable

(

void

)

Issue a TPM_Clear and re-enable/reactivate the TPM.

Returns

TPM_SUCCESS on success. If not a tpm error is returned

Definition at line 192 of file tspi.c.

References BIOS_ERR, BIOS_INFO, printk, tlcl_force_clear(), tlcl_set_deactivated(), tlcl_set_enable(), and TPM_SUCCESS.

Referenced by _factory_initialize_tpm(), safe_define_space(), safe_write(), and vb2ex_tpm_clear_owner().

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tpm_extend_pcr()

uint32_t tpm_extend_pcr	(	int	pcr,
		enum vb2_hash_algorithm	digest_algo,
		const uint8_t *	digest,
		size_t	digest_len,
		const char *	name
	)

Ask vboot for a digest and extend a TPM PCR with it.

Parameters

pcr	sets the pcr index
diget_algo	sets the digest algorithm
digest	sets the hash to extend into the tpm
digest_len	the length of the digest
name	sets additional info where the digest comes from

Returns

TPM_SUCCESS on success. If not a tpm error is returned

Definition at line 220 of file tspi.c.

References BIOS_DEBUG, BIOS_ERR, CONFIG, name, NULL, printk, tcpa_log_add_table_entry(), tlcl_extend(), tlcl_lib_init(), TPM_E_IOERROR, TPM_SUCCESS, and tspi_tpm_is_setup().

Referenced by tspi_cbfs_measurement(), and vboot_extend_pcr().

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tpm_setup()

uint32_t tpm_setup

(

int

s3flag

)

Start the TPM and establish the root of trust.

Parameters

s3flag

tells the tpm setup if we wake up from a s3 state on x86

Returns

TPM_SUCCESS on success. If not a tpm error is returned

Definition at line 135 of file tspi.c.

References BIOS_DEBUG, BIOS_ERR, BIOS_INFO, CONFIG, printk, tlcl_assert_physical_presence(), tlcl_lib_init(), tlcl_physical_presence_cmd_enable(), tlcl_startup(), TPM_E_INVALID_POSTINIT, tpm_is_setup, tpm_setup_epilogue(), tpm_setup_s3_helper(), TPM_SUCCESS, and tspi_measure_cache_to_pcr().

Referenced by bootblock_main_with_timestamp(), init_tpm_dev(), psp_verstage_s0i3_resume(), and vboot_setup_tpm().

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tpm_setup_epilogue()

static uint32_t tpm_setup_epilogue ( uint32_t  result )

static

Definition at line 80 of file tspi.c.

References BIOS_INFO, post_code, POST_TPM_FAILURE, printk, and TPM_SUCCESS.

Referenced by tpm_setup().

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tpm_setup_s3_helper()

static uint32_t tpm_setup_s3_helper ( void  )

static

Definition at line 54 of file tspi.c.

References BIOS_ERR, BIOS_INFO, printk, tlcl_resume(), TPM_E_INVALID_POSTINIT, and TPM_SUCCESS.

Referenced by tpm_setup().

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tspi_tpm_is_setup()

static int tspi_tpm_is_setup ( void  )

inlinestatic

Definition at line 91 of file tspi.c.

References CONFIG, ENV_BOOTBLOCK, ENV_RAMSTAGE, tpm_is_setup, vboot_logic_executed(), and verification_should_run().

Referenced by tpm_extend_pcr().

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Variable Documentation

tpm_is_setup

int tpm_is_setup

static

Definition at line 90 of file tspi.c.

Referenced by tpm_setup(), and tspi_tpm_is_setup().