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tpm: Rename tpm2_allow_extend()

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When that function was introduced we were only using it to check if
extending a PCR was allowed, so the name made sense. A few patches ago
we used that function to reason about the EventLog creation and general
usage of PCRs , so let's rename it to something more generic that makes
more sense in all contexts.

Signed-off-by: Raymond Mao <raymond.mao@linaro.org>
Signed-off-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Ilias Apalodimas
2024-12-24 08:01:05 -08:00
parent dbe08c7b38
commit 0698f1331f
2 changed files with 5 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
include/tpm-v2.h
View File

@@ -732,12 +732,13 @@ u16 tpm2_algorithm_to_len(enum tpm2_algorithms algo);
*/
/**
* tpm2_allow_extend() - Check if extending PCRs is allowed and safe
* tpm2_check_active_banks() - Check if the active PCR banks are supported by
* our configuration
*
* @dev: TPM device
* Return: true if allowed
*/
bool tpm2_allow_extend(struct udevice *dev);
bool tpm2_check_active_banks(struct udevice *dev);
/**
* tpm2_is_active_bank() - check the pcr_select. If at least one of the PCRs

4
lib/tpm-v2.c
View File

@@ -197,7 +197,7 @@ u32 tpm2_pcr_extend(struct udevice *dev, u32 index, u32 algorithm,
if (!digest)
return -EINVAL;
if (!tpm2_allow_extend(dev)) {
if (!tpm2_check_active_banks(dev)) {
log_err("Cannot extend PCRs if all the TPM enabled algorithms are not supported\n");
return -EINVAL;
}
@@ -896,7 +896,7 @@ u16 tpm2_algorithm_to_len(enum tpm2_algorithms algo)
return 0;
}
bool tpm2_allow_extend(struct udevice *dev)
bool tpm2_check_active_banks(struct udevice *dev)
{
struct tpml_pcr_selection pcrs;
size_t i;