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vboot: Set S3_RESUME flag for vboot context if necessary 

If a platform does verification of the memory init step, and it must
resume with the same slot that it booted from then it needs to set
the vboot context flag when resuming instead of booting.  This will
affect the slot that is selected to verify and resume from.

BUG=chromium:577269
BRANCH=glados
TEST=manually tested on chell:
1) ensure that booting from slot A resumes from slot A.
2) ensure that booting from slot B resumes from slot B.
3) do RW update while booted from slot A (so the flags are set to try
slot B) and ensure that suspend/resume still functions properly using
current slot A.
4) do RW update while booted from slot B (so the flags are set to try
slot A) and ensure that suspend/resume still functions properly using
current slot B.

Change-Id: I77e6320e36b4d2cbc308cfb39f0d4999e3497be3
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Original-Commit-Id: 4c84af7eae7b2a52a28cc3ef8a80649301215a68
Original-Change-Id: I395e5abaccd6f578111f242d1e85e28dced469ea
Original-Signed-off-by: Duncan Laurie <dlaurie@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/328775
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/13834
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
This commit is contained in:
Duncan Laurie 2016-02-19 20:26:07 -08:00 committed by Martin Roth
parent efcddd9717
commit 1cdaccab1c
1 changed files with 9 additions and 0 deletions
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9
src/vendorcode/google/chromeos/vboot2/vboot_logic.c
View File

@ -311,6 +311,15 @@ void verstage_main(void)
antirollback_read_space_firmware(&ctx);
timestamp_add_now(TS_END_TPMINIT);
/* Set S3 resume flag if vboot should behave differently when selecting
* which slot to boot. This is only relevant to vboot if the platform
* does verification of memory init and thus must ensure it resumes with
* the same slot that it booted from. */
if (IS_ENABLED(CONFIG_RESUME_PATH_SAME_AS_BOOT) &&
IS_ENABLED(CONFIG_VBOOT_STARTS_IN_BOOTBLOCK) &&
vboot_platform_is_resuming())
ctx.flags |= VB2_CONTEXT_S3_RESUME;
if (!IS_ENABLED(CONFIG_VIRTUAL_DEV_SWITCH) &&
get_developer_mode_switch())
ctx.flags |= VB2_CONTEXT_FORCE_DEVELOPER_MODE;