tpm_selftest - request TPM perform selftest and report
tpm_selftest requests that the system's TPM perform a self test
(via the TPM_SelfTestFull API) and report the results. The --results
option reports the outcome of the last self test operation without requesting
that another test be executed. If the TPM fails the self test, it enters
failure mode where no commands are accepted. The results are reported in a
manufacturer specific format. The TPM's self test is always executed
automatically at every boot.