On Wed, May 19, 2021 at 05:00:59PM +0300, amirmizi6@xxxxxxxxx wrote: > From: Amir Mizinski <amirmizi6@xxxxxxxxx> > > While running a TPM2_CC_VERIFY_SIGNATURE(0x177) operation with RSA 3070-bit The hexcode for the TPM command is absoulutely irrelevant detail. AFAIK, 3070-bit does not exist. It's 3072-bit. > keys the TPM driver fails with the following error: Empty line here. > "kernel: [ 2416.187522] tpm tpm0: Operation Timed out" > > Since a) the TPM PC Client specification does not specify a number for Remove "a)". > verify signature operation timeout, and b) the duration of Remove "b)". > 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. Empty line here. > Therefore, set the duration for TPM2_CC_VERIFY_SIGNATUE to TPM_LONG_LONG > (5 minutes). > Add here: 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 > > /Jarkko
