tpm: add longer timeout for TPM2_CC_VERIFY_SIGNATURE

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 3072-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).

[[email protected]: mangled the short summary a bit]

Link: https://trustedcomputinggroup.org/resource/pc-client-specific-platform-firmware-profile-specification/
Signed-off-by: Amir Mizinski <[email protected]>
Reviewed-by: Jarkko Sakkinen <[email protected]>
Signed-off-by: Jarkko Sakkinen <[email protected]>

Author: amirmizi

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;