diff options
| author | Joel Kitching <kitching@google.com> | 2018-11-21 00:05:12 +0800 |
|---|---|---|
| committer | ChromeOS Commit Bot <chromeos-commit-bot@chromium.org> | 2018-12-04 01:18:22 +0000 |
| commit | 7a82ccc6bd8edf869c354c8004d275d46ae553d4 (patch) | |
| tree | fa3c8e6cf6d777dab6c9089c429a1f1e55257fb2 | |
| parent | 3af78d31382aae6765a88d257b10e318192fd61e (diff) | |
| download | vboot-7a82ccc6bd8edf869c354c8004d275d46ae553d4.tar.gz | |
vboot_api: add VbSaveTpmState call for use in depthcharge
When booting into Alt OS legacy mode, we plan to save TPM state
and disable TPM before handing off control to the OS. This API
call is needed for saving state in depthcharge just before boot.
BUG=b:118172063
TEST=None
Change-Id: Ibbee0d6375de2179afa0ba64d272af72185db5a5
Reviewed-on: https://chromium-review.googlesource.com/c/1344329
Commit-Queue: Joel Kitching <kitching@chromium.org>
Tested-by: Joel Kitching <kitching@chromium.org>
Reviewed-by: Randall Spangler <rspangler@chromium.org>
| -rw-r--r-- | Makefile | 1 | ||||
| -rw-r--r-- | firmware/include/vboot_api.h | 9 | ||||
| -rw-r--r-- | firmware/lib/vboot_tpm.c | 13 |
3 files changed, 23 insertions, 0 deletions
@@ -343,6 +343,7 @@ VBSLK_SRCS = \ firmware/lib/vboot_audio.c \ firmware/lib/vboot_display.c \ firmware/lib/vboot_kernel.c \ + firmware/lib/vboot_tpm.c \ firmware/lib/vboot_ui.c \ firmware/lib/vboot_ui_menu.c \ firmware/lib/region-kernel.c \ diff --git a/firmware/include/vboot_api.h b/firmware/include/vboot_api.h index 05a509d1..73e5b5f6 100644 --- a/firmware/include/vboot_api.h +++ b/firmware/include/vboot_api.h @@ -435,6 +435,15 @@ VbError_t VbUnlockDevice(void); */ VbError_t VbLockDevice(void); +/** + * Save the TPM state. + * + * Exposes a function to save TPM state. Expected to be used in depthcharge + * right before disabling the TPM, so that the next time TPM is asked to wake + * up and restore its state (S3 resume), it will have state available. + */ +uint32_t VbSaveTpmState(void); + /*****************************************************************************/ /* Debug output (from utility.h) */ diff --git a/firmware/lib/vboot_tpm.c b/firmware/lib/vboot_tpm.c new file mode 100644 index 00000000..9c8edd6a --- /dev/null +++ b/firmware/lib/vboot_tpm.c @@ -0,0 +1,13 @@ +/* Copyright 2018 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + * + * TPM functions implemented in vboot_reference and exposed to depthcharge. + */ + +#include "tlcl.h" +#include "vboot_api.h" + +uint32_t VbSaveTpmState(void) { + return TlclSaveState(); +} |