Create a dedicated object create API for _TPM_HASH_START use case#12
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shenghuliu wants to merge 1 commit intoTrustedComputingGroup:mainfrom
Open
Create a dedicated object create API for _TPM_HASH_START use case#12shenghuliu wants to merge 1 commit intoTrustedComputingGroup:mainfrom
shenghuliu wants to merge 1 commit intoTrustedComputingGroup:mainfrom
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shenghuliu
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It is observed that asymmetric handling for CryptHashStart() and CryptHashEnd2B() in _TPM_HASH_START() and _TPM_HASH_END(), where PcrIsAllocated() is applied in _TPM_HASH_END() but not in _TPM_HASH_START(). This causes the device hardware drip issue in FW TPM HW crypto engine support use case, meaning device can't go to sleep due to the HW crypto engine seeing some pending work.
To fix the above issue, a dedicated API ObjectCreateEventSequenceHcrtmDrtm() is created and called in _TPM_HASH_START() for HCRTM/DRTM cases. Inside this newly created API, PcrIsAllocated() is applied in handling CryptHashStart(), so that all hash contexts initialized in _TPM_HASH_START() will be de-initialized in _TPM_HASH_END().
This fix has been tested in FW TPM with HW crypto engine support use case, and the device sleep issue is gone after applying this fix.