Messages in this thread | | | Date | Fri, 12 May 2023 12:22:13 -0400 | Subject | Re: [PATCH v6 13/14] tpm: Allow locality 2 to be set when initializing the TPM for Secure Launch | From | Ross Philipson <> |
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On 5/12/23 07:43, Matthew Garrett wrote: > On Thu, May 04, 2023 at 02:50:22PM +0000, Ross Philipson wrote: >> The Secure Launch MLE environment uses PCRs that are only accessible from >> the DRTM locality 2. By default the TPM drivers always initialize the >> locality to 0. When a Secure Launch is in progress, initialize the >> locality to 2. > > This looks correct in itself, but looking at the CRB driver code I don't > think locality support is actually implemented. Are there any SL systems > using CRB?
We have never seen a system that supports CRB other than some firmware TPMs that don't work with TXT in the first place. CRB is unexplored territory at this point.
Thanks Ross
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