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authorAmir Mizinski <amirmizi6@gmail.com>2021-05-25 14:13:25 +0300
committerJarkko Sakkinen <jarkko@kernel.org>2021-06-23 16:51:03 +0300
commit5317677db4290366c95f4209de387d6c9b48707f (patch)
treeaa91d6bc1a5dfc22580ec38ff9ef9fa7ea4ed012 /drivers/char
parent446cd6f0f3045dd971845e2082ff7b5dbd235743 (diff)
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 <amirmizi6@gmail.com> Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org> Signed-off-by: Jarkko Sakkinen <jarkko@kernel.org>
Diffstat (limited to 'drivers/char')
-rw-r--r--drivers/char/tpm/tpm2-cmd.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/char/tpm/tpm2-cmd.c b/drivers/char/tpm/tpm2-cmd.c
index c84d23951219..a25815a6f625 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;