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21aedee1ce
This patchs adds a new vb2_shared_data field to store the current rollback prevention version number stored in secdata (TPM). This information needs to be retrieved from there by coreboot (current hack) or vboot2 kernel verification (bright shiny future) so it can be passed along to the operating system and user space. BRANCH=veyron BUG=chrome-os-partner:35941 TEST=make runtests. Booted Jerry in recovery mode (with corresponding coreboot patch), ensured that crossystem tpm_fwver still shows the correct value. Change-Id: I2a0c3e51b158a35ac129d2abce19b40c6c6381a6 Signed-off-by: Julius Werner <jwerner@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/244601 Reviewed-by: Randall Spangler <rspangler@chromium.org>
Here's what's what in the firmware/ directory. include/ lib/ These are the original structures and APIs used in the earliest Chromebooks and continuing through 2014. It never had a version as such to begin with, but we now refer to this implementation as "vboot1" or "vboot version 1.0". linktest/ stub/ These are stubs used to link the vboot1 libraries into host-side test executables so we can run some tests on the build machine instead of a Chromebook. 2lib/ In 2014 we began work on a new vboot API. The first step was just a refactoring and renaming of the verification API. The public functions and external headers that are exported for use by the Chrome OS firmware (or anything else that wants to use vboot) live in here. The internal structures and implementations go elsewhere. lib20/ This is an early implementation of the public (2lib/) API. It is binary-compatible with vboot1, so although the interface details are different, any existing on-device structures or signatures created by the vboot1 tools can be validated using this implementation. This was deployed slightly before it was ready. That's not a problem, thanks to the binary compatibility, but this directory will be abandoned Real Soon Now, except for the product support branches. lib21/ This is where the current development of the second-generation vboot API is taking place. It uses the public (2lib/) API, but will NOT be binary compatible with vboot1 structs. Because of the early release of the lib20 stuff, we're actually calling this lib21.