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| author | Hung-Te Lin <hungte@chromium.org> | 2022-01-20 17:59:49 +0800 |
|---|---|---|
| committer | Commit Bot <commit-bot@chromium.org> | 2022-01-28 03:16:52 +0000 |
| commit | 07e20c90e151ef411a7e4700352f9e8752c3ba44 (patch) | |
| tree | c440a6204df86ae4783f292a4bf021149ca31212 | |
| parent | 4d163c53d8ab413a35fe97325ee0c03eec481fe7 (diff) | |
| download | vboot-07e20c90e151ef411a7e4700352f9e8752c3ba44.tar.gz | |
futility: updater: use diff image when preserving ME
On recent Intel platforms with CSE, the ME/CSE may change the preserved
area (for example copying ME_RW_A/CSE_RW to CSE_RO) during firmware
update. As a result, we want to use the diff image instead of real
system firmware contents when updating.
BUG=b:213706510
TEST=build and run test
BRANCH=None
Change-Id: Ib75d9ebb707e240fcbb77ac72d2c08b8c6889532
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/vboot_reference/+/3404062
Reviewed-by: YH Lin <yueherngl@chromium.org>
Reviewed-by: Nick Vaccaro <nvaccaro@google.com>
Commit-Queue: YH Lin <yueherngl@chromium.org>
| -rw-r--r-- | futility/updater_quirks.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/futility/updater_quirks.c b/futility/updater_quirks.c index e5ee5c1b..5d996ad5 100644 --- a/futility/updater_quirks.c +++ b/futility/updater_quirks.c @@ -411,6 +411,15 @@ static int quirk_preserve_me(struct updater_config *cfg) return 0; } + /* + * b/213706510: subratabanik@ confirmed CSE may modify itself while we + * are doing system update, and currently the 'preserve' is done by + * flashing the same (e.g., "previously read") contents to skip erasing + * and writing; so we have to use the diff image to prevent contents + * being changed when writing. + */ + cfg->use_diff_image = 1; + return 1; } |