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a80a79f9f5
The calling firmware can set ctx->flags VB2_CONTEXT_NVDATA_V2 to tell vboot that nvdata is a 64-byte record instead of a 16-byte record, or equivalently, set the VBSD_NVDATA_V2 flag if calling the old vboot1 API. If calling firmware does not (which is the current coreboot and depthcharge default), then the 16-byte record is used, and V2 fields return explicit default values. Added the fw_max_rollforward V2 field, which defaults to 0xfffffffe on V1. This will be used by a subsequent CL. Added unit tests to verify all that. Added crossystem support, though it will only work with the current 16-byte records until firmware sets the VBSD flag and mosys supports larger records. (Note that because coreboot/depthcharge do not yet set the new context flag, this CL should not change ToT firmware behavior.) See go/vboot-nvstorage for design doc. BUG=chromium:789276 BRANCH=none TEST=make runtests Change-Id: I43072ef153dfa016c051f560892af1fbb3508e3a Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/942031