Re: [PATCH v5 04/10] PCI/TSM: Authenticate devices via platform TSM

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Alexey Kardashevskiy wrote:
[..]
> > TDISP without IDE still needs to do all of SPDM (Component Measurement and
> > Authentication),
> 
> Support for PCI_DOE_FEATURE_CMA_SPDM says that then.

Right, the TSM core looks for that (PCI_DOE_PROTO_CMA) as part of
connect because it needs that either for TDISP or IDE.

> >and the TDISP state machine.
> 
> I'd think PCI_EXP_DEVCAP_TEE is set on something which allows
> START_INTERFACE_REQUEST and some SRIOV devices may not want to allow
> this on PF0. I am likely to be wrong here then. Hm.

PCI_EXP_DEVCAP_TEE is the only way to identify TDISP capable devices in
the guest, right? So PCI_EXP_DEVCAP_TEE means that there may be a DSM,
or a guest-side TSM tunnel to a DSM, that can affect the TDISP state of
this function.




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