2 Commits

Author	SHA1	Message	Date
Divya Jyothi	b4c205bf51	vboot_hash: Abort hash calculation on flash write ... If flash is being written, any pending hash calculation is likely to be invalid. BRANCH=None BUG=chrome-os-partner:38103 TEST=on Cyan, run hundreds of flashrom cycles to make sure there are no read, erase or write errors Change-Id: I915f8db7998c56fc12e7d85173232882fb7ed80d Signed-off-by: Divya Jyothi <divya.jyothi@intel.com> Reviewed-on: https://chromium-review.googlesource.com/282211 Reviewed-by: Shawn N <shawnn@chromium.org> Commit-Queue: Bernie Thompson <bhthompson@chromium.org> Tested-by: Bernie Thompson <bhthompson@chromium.org>	2015-07-01 03:49:00 +00:00
Randall Spangler	ad2adc4022	Invalidate hash if flash operation changes the hashed region ... This prevents the EC from returning a stale hash. BUG=chrome-os-partner:16668 BRANCH=link,snow TEST=manual, with WP disabled From EC console - Boot system and wait a second - hash --> prints valid hash - flasherase 0x20000 0x1000 - hash --> invalid - hash rw - hash --> prints valid hash - flashwrite 0x20000 0x1000 - hash --> invalid - hash rw - flasherase 0x38000 0x1000 - flashwrite 0x38000 0x1000 - hash --> still valid (since 0x38000 is outside the rw section) From root shell - ectool hash --> prints valid hash - ectool flasherase 0x20000 0x1000 - ectool hash --> invalid - ectool hash recalc RW - ectool hash --> prints valid hash - echo 'Making a hash of this' > /tmp/hashofthis - ectool flashwrite 0x20000 /tmp/hashofthis - ectool hash --> invalid - ectool hash recalc RW - ectool flasherase 0x38000 0x1000 - ectool flashwrite 0x38000 /tmp/hashofthis - ectool hash --> still valid (since 0x38000 is outside the rw section) Change-Id: Id915a504a7bc70b8b8c339b5ce55dc5bad5838fe Signed-off-by: Randall Spangler <rspangler@chromium.org> Reviewed-on: https://gerrit.chromium.org/gerrit/39484 Reviewed-by: Bill Richardson <wfrichar@chromium.org>	2012-12-10 15:14:38 -08:00