% tpm2_clockrateadjust(1) tpm2-tools | General Commands Manual
NAME
tpm2_clockrateadjust(1) - Sets the clock rate period on the TPM.
SYNOPSIS
tpm2_clockrateadjust [OPTIONS] ADJUSTER
DESCRIPTION
tpm2_clockrateadjust(1) - Adjusts the rate at which clock and time are updated on the TPM so one can better match real time. With no argument, the command is invoked but the clock rate is not altered. With an argument, the tool will adjust the clock and time period. The command can either increase or decrease the clock period via 3 distinct granularities: course, medium and fine. To specify this, the argument can be a string of 1 to 3 characters of all 's' or 'f'.
Valid Adjuster Arguments
- s - slows down the clock period one fine increment.
- ss - slows down the clock period one medium increment.
- sss - slows down the clock period one course increment.
- f - speeds up the clock period one fine increment.
- ff - speeds up the clock period one medium increment.
- fff - speeds up the clock period one course increment.
OPTIONS
-
-c, --hierarchy=OBJECT:
The hierarchy to use for authorization, either platform or owner. Defaults to the owner hierarchy if not specified.
-
-p, --auth=AUTH:
Specifies the authorization value for the hierarchy specified by option -c.
-
--cphash=FILE
File path to record the hash of the command parameters. This is commonly termed as cpHash. NOTE: When this option is selected, The tool will not actually execute the command, it simply returns a cpHash.
References
context object format details the methods for specifying OBJECT.
authorization formatting details the methods for specifying AUTH.
common options collection of common options that provide information many users may expect.
common tcti options collection of options used to configure the various known TCTI modules.
EXAMPLES
Set the clock
Slow the clock one medium increment using the owner password.
tpm2_clockrateadjust -p ownerpw ss
Speed up the clock one course increment using the platform password.
tpm2_clockrateadjust -c p -p platformpw fff