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google/chromeos/vboot2: defer clearing rec mode switch 

Certain platforms query the recovery mode switch more than just within
vboot during the boot flow. Therefore, it's important that the first call to
get_recovery_mode_switch() is consistent through memory training because
certain platforms use the recovery mode switch to take different action
for memory training. Therefore, defer the clearing of the rec mode
switch to a place when it's known that memory is up and online.

BUG=chrome-os-partner:44827
BRANCH=glados
TEST=Three finger salute is honored on chell by retraining memory.

Change-Id: I26ea51de7ffa2fe75b9ef1401fe92f9aec2b4567
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 6b0de9369242e50c7ff3b164cf1ced0642c7b087
Original-Change-Id: Ia7709c7346d1222e314bf3ac7e4335a63e9a5144
Original-Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Original-Reviewed-on: https://chromium-review.googlesource.com/325120
Original-Reviewed-by: Duncan Laurie <dlaurie@chromium.org>
Reviewed-on: https://review.coreboot.org/13604
Tested-by: build bot (Jenkins)
Reviewed-by: Martin Roth <martinroth@google.com>
This commit is contained in:
Aaron Durbin 2016-02-01 17:37:16 -06:00 committed by Patrick Georgi
parent 8a0d274444
commit d87cc3f24e
2 changed files with 11 additions and 1 deletions
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11
src/vendorcode/google/chromeos/vboot2/vboot_handoff.c
View File

@ -152,6 +152,17 @@ void vboot_fill_handoff(void)
/* needed until we finish transtion to vboot2 for kernel verification */
fill_vboot_handoff(vh, sd);
/*
* The recovery mode switch is cleared (typically backed by EC) here
* to allow multiple queries to get_recovery_mode_switch() and have
* them return consistent results during the verified boot path as well
* as dram initialization. x86 systems ignore the saved dram settings
* in the recovery path in order to start from a clean slate. Therefore
* clear the state here since this function is called when memory
* is known to be up.
*/
clear_recovery_mode_switch();
}
/*

1
src/vendorcode/google/chromeos/vboot2/vboot_logic.c
View File

@ -316,7 +316,6 @@ void verstage_main(void)
ctx.flags |= VB2_CONTEXT_FORCE_DEVELOPER_MODE;
if (get_recovery_mode_switch()) {
clear_recovery_mode_switch();
ctx.flags |= VB2_CONTEXT_FORCE_RECOVERY_MODE;
if (IS_ENABLED(CONFIG_VBOOT_DISABLE_DEV_ON_RECOVERY))
ctx.flags |= VB2_DISABLE_DEVELOPER_MODE;