sunxi: enable MMU_PGPROT proper page table protection

Select the new MMU_PGPROT Kconfig symbol for all Allwinner board builds,
to use a write-protected .rodata, non-executable .data and .rodata
sections, and non-writable .text sections.

This might trigger runtime exceptions in misbehaving drivers, which
should then be fixed.

Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>

diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig
index df373d3..fedfdb2 100644 (file)
--- a/arch/arm/Kconfig
+++ b/arch/arm/Kconfig
@@ -1190,6 +1190,7 @@ config ARCH_SUNXI
        select DM_SPI_FLASH if SPI && MTD
        select DM_KEYBOARD
        select DM_SERIAL
+       select MMU_PGPROT if ARM64
        select OF_BOARD_SETUP
        select OF_CONTROL
        select PINCTRL