diff options
Diffstat (limited to 'include/tpm-common.h')
| -rw-r--r-- | include/tpm-common.h | 18 |
1 files changed, 17 insertions, 1 deletions
diff --git a/include/tpm-common.h b/include/tpm-common.h index 1ba81386ce1..fd33cba6ef2 100644 --- a/include/tpm-common.h +++ b/include/tpm-common.h @@ -42,12 +42,22 @@ enum tpm_version { TPM_V2, }; +/* + * We deviate from this draft of the specification by increasing the value of + * TPM2_NUM_PCR_BANKS from 3 to 16 to ensure compatibility with TPM2 + * implementations that have enabled a larger than typical number of PCR + * banks. This larger value for TPM2_NUM_PCR_BANKS is expected to be included + * in a future revision of the specification. + */ +#define TPM2_NUM_PCR_BANKS 16 + /** * struct tpm_chip_priv - Information about a TPM, stored by the uclass * - * These values must be set up by the device's probe() method before + * Some of hese values must be set up by the device's probe() method before * communcation is attempted. If the device has an xfer() method, this is * not needed. There is no need to set up @buf. + * The active_banks is only valid for TPMv2 after the device is initialized. * * @version: TPM stack to be used * @duration_ms: Length of each duration type in milliseconds @@ -55,6 +65,8 @@ enum tpm_version { * @buf: Buffer used during the exchanges with the chip * @pcr_count: Number of PCR per bank * @pcr_select_min: Minimum size in bytes of the pcrSelect array + * @active_bank_count: Number of active PCR banks + * @active_banks: Array of active PCRs * @plat_hier_disabled: Platform hierarchy has been disabled (TPM is locked * down until next reboot) */ @@ -68,6 +80,10 @@ struct tpm_chip_priv { /* TPM v2 specific data */ uint pcr_count; uint pcr_select_min; +#if IS_ENABLED(CONFIG_TPM_V2) + u8 active_bank_count; + u32 active_banks[TPM2_NUM_PCR_BANKS]; +#endif bool plat_hier_disabled; }; |