ARM: mach-omap2: omap3/am335x: Enable ACR::IBE on Cortex-A8 SoCs for CVE-2017-5715
Enable CVE-2017-5715 option to set the IBE bit. This enables kernel
workarounds necessary for the said CVE.
With this enabled, Linux reports:
CPU0: Spectre v2: using BPIALL workaround
This workaround may need to be re-applied in OS environment around low
power transition resume states where context of ACR would be lost (off-mode
etc).
Signed-off-by: Nishanth Menon <nm@ti.com>
diff --git a/arch/arm/mach-omap2/Kconfig b/arch/arm/mach-omap2/Kconfig
index 77820cc..f4babc8 100644
--- a/arch/arm/mach-omap2/Kconfig
+++ b/arch/arm/mach-omap2/Kconfig
@@ -10,6 +10,7 @@
select ARM_ERRATA_454179
select ARM_ERRATA_621766
select ARM_ERRATA_725233
+ select ARM_CORTEX_A8_CVE_2017_5715
select USE_TINY_PRINTF
imply NAND_OMAP_GPMC
imply SPL_EXT_SUPPORT
@@ -116,6 +117,7 @@
config AM33XX
bool "AM33XX SoC"
select SPECIFY_CONSOLE_INDEX
+ select ARM_CORTEX_A8_CVE_2017_5715
imply NAND_OMAP_ELM
imply NAND_OMAP_GPMC
imply SPL_NAND_AM33XX_BCH