On Wed, Dec 27, 2017 at 10:55:32AM +0800, kernel test robot wrote:

> caused below changes (please refer to attached dmesg/kmsg for entire 
> log/backtrace):
> 
> [    5.903660] tpm_tis 00:05: 1.2 TPM (device-id 0xFE, rev-id 70)
> [    5.934271] tpm tpm0: A TPM error (7) occurred attempting to read a pcr 
> value
> [    5.941471] tpm tpm0: TPM is disabled/deactivated (0x7)
> [    5.953053] tpm tpm0: A TPM error (7) occurred attempting get random

Should the BIOS expose a disabled/deactivated TPM to the operating
system?

Jason

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