From: Amir Mizinski <amirmizi6@xxxxxxxxx> While running a TPM2_CC_VERIFY_SIGNATURE operation with RSA 3072-bit keys the TPM driver fails with the following error: "kernel: [ 2416.187522] tpm tpm0: Operation Timed out" Since the TPM PC Client specification does not specify a number for verify signature operation timeout, and the duration of TPM2_CC_VERIFY_SIGNATURE with RSA 3070-bit keys exceeds the current timeout of TPM_LONG (2 seconds), it is preferable to pick the longest timeout possible. Therefore, set the duration for TPM2_CC_VERIFY_SIGNATUE to TPM_LONG_LONG (5 minutes). link: https://trustedcomputinggroup.org/resource/pc-client-specific-platform-firmware-profile-specification/ Signed-off-by: Amir Mizinski <amirmizi6@xxxxxxxxx> --- drivers/char/tpm/tpm2-cmd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index 7603295..e71154b 100644 --- a/drivers/char/tpm/tpm2-cmd.c +++ b/drivers/char/tpm/tpm2-cmd.c @@ -87,7 +87,7 @@ static u8 tpm2_ordinal_duration_index(u32 ordinal) return TPM_MEDIUM; case TPM2_CC_VERIFY_SIGNATURE: /* 177 */ - return TPM_LONG; + return TPM_LONG_LONG; case TPM2_CC_PCR_EXTEND: /* 182 */ return TPM_MEDIUM; -- 2.7.4
