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cgpt: Add a callback to allow override of GPT entry priority

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This can be used by implementations that want to request vboot to
favor a particular kernel entry for booting without affecting the
checks for rollback protection and image verification.

CQ-DEPEND=CL:274716, CL:274932, CL:275171
BUG=None
BRANCH=None
TEST=Compiles successfully. make -j runtests successful.

Change-Id: I6a4600020354f5d4118c17f083c353c2585c4181
Signed-off-by: Furquan Shaikh <furquan@google.com>
Reviewed-on: https://chromium-review.googlesource.com/274558
Reviewed-by: Furquan Shaikh <furquan@chromium.org>
Reviewed-by: Stefan Reinauer <reinauer@chromium.org>
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Commit-Queue: Nicolas Boichat <drinkcat@chromium.org>
Trybot-Ready: Nicolas Boichat <drinkcat@chromium.org>
This commit is contained in:
Furquan Shaikh
2015-06-02 10:32:52 -07:00
committed by ChromeOS Commit Bot
parent 04e2338857
commit 7a1c0d1ec8
5 changed files with 105 additions and 0 deletions
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14
firmware/include/vboot_api.h
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@@ -24,6 +24,8 @@
#include <stdint.h>
#include <stdlib.h>
#include "gpt.h"
/*****************************************************************************/
/* Error codes */
@@ -1057,4 +1059,16 @@ VbError_t VbUnlockDevice(void);
*/
VbError_t VbLockDevice(void);
/**
* Check if the firmware wants to override GPT entry priority.
*
* In case of kernel entry, check if there is an override of priority
* available. This is used to select a particular partition to boot in the
* current boot cycle. Rollback protection, image verification and all other
* checks in LoadKernel still remain the same.
*
* @param e Gpt Entry to check for priority override.
* @return 0 if no override, 1-15 for override priority.
*/
uint8_t VbExOverrideGptEntryPriority(const GptEntry *e);
#endif /* VBOOT_REFERENCE_VBOOT_API_H_ */