HRESULT 0x8028090A (TPM_20_E_TESTING): meaning and diagnosis

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Description:

The TPM is running self-tests and the requested function is not ready yet.

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TPM_20_E_CANCELED	TPM_20_E_NV_RATE

TPM_20_E_TESTING

Self-test is in progress

TPM_20_E_TESTING maps to the warning TPM_RC_TESTING. After a self-test request, the TPM may continue testing internally. Commands that require a function still under test return this status, while commands such as TPM2_GetTestResult remain available to report progress and manufacturer-specific result data.

The correct reaction is usually to wait and query the test result, not to clear, reprovision, or repeatedly power-cycle the TPM. A transition from TESTING to FAILURE is materially different and should be captured as a firmware or hardware diagnostic event.

Handling guidance

Poll with a sensible delay rather than saturating the TPM with immediate retries.
Use GetTestResult to distinguish pending tests from a completed failure.
Record whether full or incremental self-test was requested and which algorithm initiated it.
If testing never completes across a cold restart, collect firmware identifiers and consult the system manufacturer.

References

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