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arm: Kconfig: Explain TFABOOT

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The CONFIG_TFABOOT option is more about what U-Boot DOES NOT need to do
than to support some features.

Explain a bit more in the Kconfig help text to avoid misunderstandings.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Reviewed-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Andre Przywara 2020-09-30 15:45:07 +01:00 committed by Tom Rini
parent fc6ef71a66
commit cee2e022d2
1 changed files with 7 additions and 2 deletions
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arch/arm/Kconfig
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@ -1801,8 +1801,13 @@ config TFABOOT
depends on ARCH_SUPPORT_TFABOOT depends on ARCH_SUPPORT_TFABOOT
default n default n
help help
Enabling this will make a U-Boot binary that is capable of being Some platforms support the setup of secure registers (for instance
booted via TF-A (Trusted Firmware for Cortex-A). for CPU errata handling) or provide secure services like PSCI.
Those services could also be provided by other firmware parts
like TF-A (Trusted Firmware for Cortex-A), in which case U-Boot
does not need to (and cannot) execute this code.
Enabling this option will make a U-Boot binary that is relying
on other firmware layers to provide secure functionality.
config TI_SECURE_DEVICE config TI_SECURE_DEVICE
bool "HS Device Type Support" bool "HS Device Type Support"