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Fix a few more instances of global variable usage in the tlcl
and marshaling code for tpm2.
For the tlcl case this buffer doesn't need to be static as it
isn't used after this function exits.
Change-Id: Ia739c81d79c6cee9046ae96061045fe4f7fb7c23
Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/16393
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
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Decorated tpm2 statics with CAR_GLOBAL
BUG=chrome-os-partner:55083
BRANCH=none
TEST=none
Change-Id: I85620d5c6ffddab5514c01c2c652670bf33b4e7e
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: ae43d3bb7fed5b891ed38cd268bfe4e1416b77e2
Original-Change-Id: I871442ec096836a86870f8d53a3058c9c040cff8
Original-Signed-off-by: Victor Prupis <vprupis@google.com>
Original-Reviewed-on: https://chromium-review.googlesource.com/373243
Original-Commit-Ready: Stefan Reinauer <reinauer@google.com>
Original-Tested-by: Stefan Reinauer <reinauer@google.com>
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/16366
Tested-by: build bot (Jenkins)
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
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TPM PCRs are used in Chrome OS for two purposes: to communicate
crucial information from RO firmware and to protect FW and kernel
rollback counters from being deleted.
As implemented in a TPM1 compatible way, the PCR extension command
requires a prebuilt digest to calculate a new PCR value.
TPM2 specification introduces a PCR_Event command, where the TPM
itself calculates the digest of an arbitrary length string, and then
uses the calculated digest for PCR extension. PCR_Event could be a
better option for Chrome OS, this needs to be investigated separately.
BRANCH=none
BUG=chrome-os-partner:50645
TEST=verified that the two PCRs are successfully extended before the
RW firmware is called.
Change-Id: I38fc88172de8ec8bef56fec026f83058480c8010
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 73388139db3ffaf61a3d9027522c5ebecb3ad051
Original-Change-Id: I1a9bab7396fdb652e2e3bc8529b828ea3423d851
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/358098
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Darren Krahn <dkrahn@chromium.org>
Reviewed-on: https://review.coreboot.org/15639
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
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TPM1.2 is using the somewhat misnamed tlcl_set_global_lock() command
function to lock the hardware rollback counter. For TPM2 let's
implement and use the TPM2 command to lock an NV Ram location
(TPM2_NV_WriteLock).
BRANCH=none
BUG=chrome-os-partner:50645
TEST=verified that TPM2_NV_WriteLock command is invoked before RO
firmware starts RW, and succeeds.
Change-Id: I52aa8db95b908488ec4cf0843afeb6310dc7f38b
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 2f859335dfccfeea900f15bbb8c6cb3fd5ec8c77
Original-Change-Id: I62f22b9991522d4309cccc44180a5ebd4dca488d
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/358097
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-by: Darren Krahn <dkrahn@chromium.org>
Reviewed-on: https://review.coreboot.org/15638
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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The command is sent in session mode, but has no parameters associated
with it.
BRANCH=none
BUG=chrome-os-partner:50645
TEST=with the following patches verified that TPM_Clear command is
handled successfully by the TPM.
Change-Id: I3c9151e336084160acd3bb1f36f45b4d5efd4a33
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 503ad5e72fd5bd902325d74fd680c17c7c590e36
Original-Change-Id: Ida19e75166e1282732810cf45be21e59515d88e2
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/357973
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15634
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
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For coreboot TPM2 the use case session header is always the minimal
possible size, the only difference is that some commands require one
and some require two handles.
Refactor common session header marshalling code into a separate
function. This will be useful when more commands marshalling code is
added.
BRANCH=none
BUG=chrome-os-partner:50645
TEST=flashed the TPM and rebooted the device a few times, it
successfully loaded chrome os on every attempt.
Change-Id: I9b1697c44f67aab32b9cd556b559a55d5050be06
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: a97a7fa16ceeb484e90e2e1f0573e58a468350b2
Original-Change-Id: I86e6426be5200f28ebb2174b418254018e81da8e
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/357972
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15633
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
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The function is reusing some variables which confuses the reader as
the variable names do not match their second function.
This patch edits the code for readability without changing
functionality.
BRANCH=None
BUG=chrome-os-partner:50465
TEST=with the rest of the patches applied Kevin still boots into
chrome OS.
Change-Id: I396206a64403229ba3921a47b5a08748d8a4b0a3
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 3cf02c365d098c9d2ca57def7cf349ef2291d140
Original-Change-Id: I95a07945d9d2b00a69d514014f848802b82dd90f
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/358915
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15611
Tested-by: build bot (Jenkins)
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
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The marshaling/unmarshaling code is using integer values to represent
room left in the buffer, to be able to communicate three conditions:
positive number means there is room left in the buffer, zero means
that the exact amount of data in the buffer was unmarshaled and
negative value means that the result of the operation did not fit into
the buffer.
The implementation is wrong though, as it compares directly signed and
unsigned values, which is illegal, as signed values get promoted to
unsigned by the compiler.
This patch changes the marshaling code to use size_t for the size, and
use zero as marshaling failure indication - after all the buffer where
the data is marshaled to should definitely be large enough, and it is
reasonable to expect at least some room left in it after marshaling.
The unmarshaling situation is different: we sure want to communicate
errors to the caller, but do not want to propagate error return values
through multiple layers. This patch keeps the size value in int, but
checks if it is negative separately, before comparing with positive
values.
BRANCH=none
BUG=chrome-os-partner:50645
TEST=with the rest of the patches applied kevin successfully boots up.
Change-Id: Ibfbd1b351e35e37c8925a78d095e4e8492805bad
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: b1e862c2a650fa5f6cb25a01fe61e848a696cf17
Original-Change-Id: Ie7552b333afaff9a1234c948caf9d9a64447b2e1
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/358772
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/15610
Tested-by: build bot (Jenkins)
Reviewed-by: Patrick Georgi <pgeorgi@google.com>
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TPM commands need to be serialized (marshaled) to be sent to the
device, and the responses need to be de-serialized (unmarshaled) to be
properly interpreted by upper layers.
This layer does not exist in TPM1.2 coreboot implementation, all TPM
commands used there were hardcoded as binary arrays. Availability of
the marshaling/unmarshaling layer makes it much easier to add new TPM
commands to the code.
Command and response structures used in these functions are defined in
Parts 2 and 3 of the TCG issued document
Trusted Platform Module Library
Family "2.0"
Level 00 Revision 01.16
October 30, 2014
BRANCH=none
BUG=chrome-os-partner:50645
TEST=with the rest of the patches applied it is possible to
successfully initialize firmware and kernel TPM spaces.
Change-Id: I80b3f971e347bb30ea08f820ec3dd27e1656c060
Signed-off-by: Martin Roth <martinroth@chromium.org>
Original-Commit-Id: 0782d9d452efb732e85d1503fccfcb4bf9f69a68
Original-Change-Id: I202276ef9a43c28b5f304f901ac5b91048878b76
Original-Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/353915
Original-Reviewed-by: Bill Richardson <wfrichar@chromium.org>
Original-Reviewed-by: Darren Krahn <dkrahn@chromium.org>
Reviewed-on: https://review.coreboot.org/15570
Tested-by: build bot (Jenkins)
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@googlemail.com>
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