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path: root/src/security/tpm/tspi/tspi.c
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Diffstat (limited to 'src/security/tpm/tspi/tspi.c')
-rw-r--r--src/security/tpm/tspi/tspi.c116
1 files changed, 58 insertions, 58 deletions
diff --git a/src/security/tpm/tspi/tspi.c b/src/security/tpm/tspi/tspi.c
index ec695819fd..22383d4027 100644
--- a/src/security/tpm/tspi/tspi.c
+++ b/src/security/tpm/tspi/tspi.c
@@ -15,49 +15,49 @@ static uint32_t tpm1_invoke_state_machine(void)
{
uint8_t disabled;
uint8_t deactivated;
- uint32_t result = TPM_SUCCESS;
+ uint32_t rc = TPM_SUCCESS;
/* Check that the TPM is enabled and activated. */
- result = tlcl_get_flags(&disabled, &deactivated, NULL);
- if (result != TPM_SUCCESS) {
+ rc = tlcl_get_flags(&disabled, &deactivated, NULL);
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't read capabilities.\n");
- return result;
+ return rc;
}
if (disabled) {
printk(BIOS_INFO, "TPM: is disabled. Enabling...\n");
- result = tlcl_set_enable();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_set_enable();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't set enabled state.\n");
- return result;
+ return rc;
}
}
if (!!deactivated != CONFIG(TPM_DEACTIVATE)) {
printk(BIOS_INFO,
"TPM: Unexpected TPM deactivated state. Toggling...\n");
- result = tlcl_set_deactivated(!deactivated);
- if (result != TPM_SUCCESS) {
+ rc = tlcl_set_deactivated(!deactivated);
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR,
"TPM: Can't toggle deactivated state.\n");
- return result;
+ return rc;
}
deactivated = !deactivated;
- result = TPM_E_MUST_REBOOT;
+ rc = TPM_E_MUST_REBOOT;
}
- return result;
+ return rc;
}
#endif
static uint32_t tpm_setup_s3_helper(void)
{
- uint32_t result;
+ uint32_t rc;
- result = tlcl_resume();
- switch (result) {
+ rc = tlcl_resume();
+ switch (rc) {
case TPM_SUCCESS:
break;
@@ -67,25 +67,25 @@ static uint32_t tpm_setup_s3_helper(void)
* in S3, so it's already initialized.
*/
printk(BIOS_INFO, "TPM: Already initialized.\n");
- result = TPM_SUCCESS;
+ rc = TPM_SUCCESS;
break;
default:
- printk(BIOS_ERR, "TPM: Resume failed (%#x).\n", result);
+ printk(BIOS_ERR, "TPM: Resume failed (%#x).\n", rc);
break;
}
- return result;
+ return rc;
}
-static uint32_t tpm_setup_epilogue(uint32_t result)
+static uint32_t tpm_setup_epilogue(uint32_t rc)
{
- if (result != TPM_SUCCESS)
+ if (rc != TPM_SUCCESS)
post_code(POSTCODE_TPM_FAILURE);
else
printk(BIOS_INFO, "TPM: setup succeeded\n");
- return result;
+ return rc;
}
static int tpm_is_setup;
@@ -135,12 +135,12 @@ static inline int tspi_tpm_is_setup(void)
*/
uint32_t tpm_setup(int s3flag)
{
- uint32_t result;
+ uint32_t rc;
- result = tlcl_lib_init();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_lib_init();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't initialize.\n");
- return tpm_setup_epilogue(result);
+ return tpm_setup_epilogue(rc);
}
/* Handle special init for S3 resume path */
@@ -149,69 +149,69 @@ uint32_t tpm_setup(int s3flag)
return tpm_setup_epilogue(tpm_setup_s3_helper());
}
- result = tlcl_startup();
+ rc = tlcl_startup();
if (CONFIG(TPM_STARTUP_IGNORE_POSTINIT)
- && result == TPM_E_INVALID_POSTINIT) {
+ && rc == TPM_E_INVALID_POSTINIT) {
printk(BIOS_DEBUG, "TPM: ignoring invalid POSTINIT\n");
- result = TPM_SUCCESS;
+ rc = TPM_SUCCESS;
}
- if (result != TPM_SUCCESS) {
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't run startup command.\n");
- return tpm_setup_epilogue(result);
+ return tpm_setup_epilogue(rc);
}
- result = tlcl_assert_physical_presence();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_assert_physical_presence();
+ if (rc != TPM_SUCCESS) {
/*
* It is possible that the TPM was delivered with the physical
* presence command disabled. This tries enabling it, then
* tries asserting PP again.
*/
- result = tlcl_physical_presence_cmd_enable();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_physical_presence_cmd_enable();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't enable physical presence command.\n");
- return tpm_setup_epilogue(result);
+ return tpm_setup_epilogue(rc);
}
- result = tlcl_assert_physical_presence();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_assert_physical_presence();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't assert physical presence.\n");
- return tpm_setup_epilogue(result);
+ return tpm_setup_epilogue(rc);
}
}
#if CONFIG(TPM1)
- result = tpm1_invoke_state_machine();
+ rc = tpm1_invoke_state_machine();
#endif
if (CONFIG(TPM_MEASURED_BOOT))
- result = tspi_measure_cache_to_pcr();
+ rc = tspi_measure_cache_to_pcr();
tpm_is_setup = 1;
- return tpm_setup_epilogue(result);
+ return tpm_setup_epilogue(rc);
}
uint32_t tpm_clear_and_reenable(void)
{
- uint32_t result;
+ uint32_t rc;
printk(BIOS_INFO, "TPM: Clear and re-enable\n");
- result = tlcl_force_clear();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_force_clear();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't initiate a force clear.\n");
- return result;
+ return rc;
}
#if CONFIG(TPM1)
- result = tlcl_set_enable();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_set_enable();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't set enabled state.\n");
- return result;
+ return rc;
}
- result = tlcl_set_deactivated(0);
- if (result != TPM_SUCCESS) {
+ rc = tlcl_set_deactivated(0);
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't set deactivated state.\n");
- return result;
+ return rc;
}
#endif
@@ -221,24 +221,24 @@ uint32_t tpm_clear_and_reenable(void)
uint32_t tpm_extend_pcr(int pcr, enum vb2_hash_algorithm digest_algo,
const uint8_t *digest, size_t digest_len, const char *name)
{
- uint32_t result;
+ uint32_t rc;
if (!digest)
return TPM_E_IOERROR;
if (tspi_tpm_is_setup()) {
- result = tlcl_lib_init();
- if (result != TPM_SUCCESS) {
+ rc = tlcl_lib_init();
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Can't initialize library.\n");
- return result;
+ return rc;
}
printk(BIOS_DEBUG, "TPM: Extending digest for `%s` into PCR %d\n", name, pcr);
- result = tlcl_extend(pcr, digest, digest_algo);
- if (result != TPM_SUCCESS) {
+ rc = tlcl_extend(pcr, digest, digest_algo);
+ if (rc != TPM_SUCCESS) {
printk(BIOS_ERR, "TPM: Extending hash for `%s` into PCR %d failed.\n",
name, pcr);
- return result;
+ return rc;
}
}
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-17 22:26:16 +0000