TPM Emulator with L4Linux

[Adam Lackorzynski]

On Wed Aug 23, 2006 at 20:07:39 +0200, Andreas Niederl wrote:
> has anybody successfully used the TPM Emulator[1] module with L4Linux?
> 
> I have been trying using it with TrouSerS[2] but fail on starting tcsd 
> with the following two errors (always one of them but never both at the 
> same time):
> 
> gentoo-l4 TDDL[4480]: tddl.c:105 Calling write to driver
> gentoo-l4 tpm_emulator tpm_emulator-0.4/./linux_module.c:113: Debug: 
> tpm_ioctl(21505, 0808e500)
> gentoo-l4 tpm_emulator tpm_emulator-0.4/tpm/tpm_cmd_handler.c:4156: 
> Debug: tpm_handle_command()
> gentoo-l4 tpm_emulator tpm_emulator-0.4/tpm/tpm_cmd_handler.c:3473: 
> Info: The tag value sent to for a command (0x6564) is invalid
> gentoo-l4 TCS[4480]: tcs_utils.c:260 ERROR: TCS GetCapability failed 
> with result = 0x1e
> 
> and
> 
> gentoo-l4 TDDL[4483]: tddl.c:105 Calling write to driver
> gentoo-l4 tpm_emulator tpm_emulator-0.4/./linux_module.c:113: Debug: 
> tpm_ioctl(21505, 0808e500)
> gentoo-l4 tpm_emulator tpm_emulator-0.4/tpm/tpm_cmd_handler.c:4156: 
> Debug: tpm_handle_command()
> gentoo-l4 tpm_emulator tpm_emulator-0.4/tpm/tpm_cmd_handler.c:4160: 
> Error: tpm_unmarshal_TPM_REQUEST() failed
> gentoo-l4 TDDL[4483]: tddl.c:148 ERROR: Zero bytes read from device /dev/tpm
> gentoo-l4 TCS[4483]: tcs_utils.c:260 ERROR: TCS GetCapability failed 
> with result = 0x1087
> 
> I guess that something is going wrong with the call to ioctl from tddl 
> but wasn't able to figure it out yet.
> 
> Are there modifications necessary for using modules with L4Linux?

No.

I had a quick glance over the source of the module and couldn't see
any reason why it should not work under L4Linux when it works under
Linux. It does work there?




Adam
-- 
Adam                 adam at os.inf.tu-dresden.de
  Lackorzynski         http://os.inf.tu-dresden.de/~adam/