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avb2.0: add proper dependencies

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1. Since libavb library alone is highly portable, introduce dedicated
Kconfig symbol for AVB bootloader-dependent operations, so it's possible
to build libavb separately. AVB bootloader-dependent operations include:
  * Helpers to process strings in order to build OS bootargs.
  * Helpers to access MMC, similar to drivers/fastboot/fb_mmc.c.
  * Helpers to alloc/init/free avb ops.
2. Add CONFIG_FASTBOOT dependency, as fastboot buffer is
re-used in partition verification operations.

Reported-by: Eugeniu Rosca <rosca.eugeniu@gmail.com>
Signed-off-by: Igor Opaniuk <igor.opaniuk@linaro.org>
Reviewed-by: Eugeniu Rosca <rosca.eugeniu@gmail.com>
Tested-by: Eugeniu Rosca <rosca.eugeniu@gmail.com>
This commit is contained in:
Igor Opaniuk 2018-07-17 14:33:25 +03:00 committed by Tom Rini
parent 149c21b098
commit b0aa74a264
4 changed files with 13 additions and 2 deletions
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2
cmd/Kconfig
View file

@ -1779,7 +1779,7 @@ config CMD_TRACE
config CMD_AVB
bool "avb - Android Verified Boot 2.0 operations"
depends on LIBAVB
depends on AVB_VERIFY
default n
help
Enables a "avb" command to perform verification of partitions using

10
common/Kconfig
View file

@ -637,6 +637,16 @@ config HASH
and the algorithms it supports are defined in common/hash.c. See
also CMD_HASH for command-line access.
config AVB_VERIFY
bool "Build Android Verified Boot operations"
depends on LIBAVB && FASTBOOT
help
This option enables compilation of bootloader-dependent operations,
used by Android Verified Boot 2.0 library (libavb). Includes:
* Helpers to process strings in order to build OS bootargs.
* Helpers to access MMC, similar to drivers/fastboot/fb_mmc.c.
* Helpers to alloc/init/free avb ops.
endmenu
menu "Update support"

2
common/Makefile
View file

@ -121,4 +121,4 @@ obj-$(CONFIG_$(SPL_)LOG_CONSOLE) += log_console.o
obj-y += s_record.o
obj-y += xyzModem.o
obj-$(CONFIG_LIBAVB) += avb_verify.o
obj-$(CONFIG_AVB_VERIFY) += avb_verify.o

1
doc/README.avb2
View file

@ -58,6 +58,7 @@ Slot verification result: ERROR_IO
-----------------------------------
The following options must be enabled:
CONFIG_LIBAVB=y
CONFIG_AVB_VERIFY=y
CONFIG_CMD_AVB=y