The TCG PC Client Protocol spec for TPM2 devices says:
"All structures defined in this specification are packed. Some compilers
may insert space between fields of a structure to align them. This
functionality SHALL be disabled, so structures are packed"
The TCG_EVENT_HEADER and TrEE_EVENT structures are defined in
TrEEProtocol.h as being packed, but TREE_BOOT_SERVICE_CAPABILITY_1_0
isn't. Since implementations appear to have shipped with this it's
clearly impossible to make any changes now, but should we expect systems
with the 1.1 structure (ie, with the additional information regarding
PCR banks) to be packed or not?
--
Matthew Garrett | [email protected]
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