diff options
Diffstat (limited to 'common/tpm_registers.c')
| -rw-r--r-- | common/tpm_registers.c | 22 |
1 files changed, 18 insertions, 4 deletions
diff --git a/common/tpm_registers.c b/common/tpm_registers.c index c4353dd566..7d4ecccfbf 100644 --- a/common/tpm_registers.c +++ b/common/tpm_registers.c @@ -850,10 +850,24 @@ void tpm_task(void) } else #endif { - ExecuteCommand(tpm_.fifo_write_index, - tpm_.regs.data_fifo, - &response_size, - &response); + if (board_id_is_mismatched()) { + static const char tpm_broken_response[] = { + 0x80, 0x01, /* TPM_ST_NO_SESSIONS */ + 0, 0, 0, 10, /* Response size. */ + 0, 0, 9, 0x21 /* TPM_RC_LOCKOUT */ + }; + CPRINTF("%s: Ignoring TPM commands\n", + __func__); + response = tpm_.regs.data_fifo; + response_size = sizeof(tpm_broken_response); + memcpy(response, tpm_broken_response, + response_size); + } else { + ExecuteCommand(tpm_.fifo_write_index, + tpm_.regs.data_fifo, + &response_size, + &response); + } } CPRINTF("got %d bytes in response\n", response_size); if (response_size && |