The number of PCR banks return by the tpm2_get_pcr_info() is related to TPM supported list of hash algorithm that could be greater than thus supported by U-Boot. This is not an issue as long as the PCR active bank hash an hash algorithm supported by U-Boot. Therefore, checking the number of PCR bank supported by the dTPM and thus supported by U-Boot doesn't make sense. This test shall be removed or shall reflect the maximum hash algorithm defined by the TPM2.0 spec 1.59 which is 8 hash algorithms.
Signed-off-by: Benjamin BARATTE benjamin.baratte@st.com ---
lib/tpm-v2.c | 8 -------- 1 file changed, 8 deletions(-)
diff --git a/lib/tpm-v2.c b/lib/tpm-v2.c index 59e6cbafaf..64a2f15fee 100644 --- a/lib/tpm-v2.c +++ b/lib/tpm-v2.c @@ -413,14 +413,6 @@ int tpm2_get_pcr_info(struct udevice *dev, struct tpml_pcr_selection *pcrs) return ret;
pcrs->count = get_unaligned_be32(response); - /* - * We only support 4 algorithms for now so check against that - * instead of TPM2_NUM_PCR_BANKS - */ - if (pcrs->count > 4 || pcrs->count < 1) { - printf("%s: too many pcrs: %u\n", __func__, pcrs->count); - return -EMSGSIZE; - }
ret = tpm2_get_num_pcr(dev, &num_pcr); if (ret) -- 2.34.1
ST Restricted