From: Amir Mizinski Date: Tue, 25 May 2021 11:13:25 +0000 (+0300) Subject: tpm: add longer timeout for TPM2_CC_VERIFY_SIGNATURE X-Git-Tag: accepted/tizen/unified/20230118.172025~6954^2~4 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5317677db4290366c95f4209de387d6c9b48707f;p=platform%2Fkernel%2Flinux-rpi.git 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). [jarkko@kernel.org: mangled the short summary a bit] Link: https://trustedcomputinggroup.org/resource/pc-client-specific-platform-firmware-profile-specification/ Signed-off-by: Amir Mizinski Reviewed-by: Jarkko Sakkinen Signed-off-by: Jarkko Sakkinen --- diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c index c84d239..a25815a 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;