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ARM: mach-omap2: omap3/am335x: Enable ACR::IBE on Cortex-A8 SoCs for CVE-2017-5715

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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>
This commit is contained in:
Nishanth Menon 2018-06-12 15:24:11 -05:00 • committed by Tom Rini
parent dbb7caf110
commit 94c6a89a99
1 changed files with 2 additions and 0 deletions
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2
arch/arm/mach-omap2/Kconfig
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@ -10,6 +10,7 @@ config OMAP34XX
select ARM_ERRATA_454179 select ARM_ERRATA_454179
select ARM_ERRATA_621766 select ARM_ERRATA_621766
select ARM_ERRATA_725233 select ARM_ERRATA_725233
select ARM_CORTEX_A8_CVE_2017_5715
select USE_TINY_PRINTF select USE_TINY_PRINTF
imply NAND_OMAP_GPMC imply NAND_OMAP_GPMC
imply SPL_EXT_SUPPORT imply SPL_EXT_SUPPORT
@ -116,6 +117,7 @@ config AM43XX
config AM33XX config AM33XX
bool "AM33XX SoC" bool "AM33XX SoC"
select SPECIFY_CONSOLE_INDEX select SPECIFY_CONSOLE_INDEX
select ARM_CORTEX_A8_CVE_2017_5715
imply NAND_OMAP_ELM imply NAND_OMAP_ELM
imply NAND_OMAP_GPMC imply NAND_OMAP_GPMC
imply SPL_NAND_AM33XX_BCH imply SPL_NAND_AM33XX_BCH