Re: [U-Boot] [U-Boot, 3/4] ARM: mach-omap2: omap5/dra7: Enable ACTLR[0] (Enable invalidates of BTB) to facilitate CVE_2017-5715 WA in OS

On Tue, Jun 12, 2018 at 03:24:10PM -0500, Nishanth Menon wrote:

Enable CVE_2017_5715 and since we have our own v7_arch_cp15_set_acr function to setup the bits, we are able to override the settings.

Without this enabled, Linux kernel reports: CPU0: Spectre v2: firmware did not set auxiliary control register IBE bit, system vulnerable

With this enabled, Linux kernel reports: CPU0: Spectre v2: using ICIALLU workaround

NOTE: This by itself does not enable the workaround for CPU1 (on OMAP5 and DRA72/AM572 SoCs) and may require additional kernel patches.

Signed-off-by: Nishanth Menon nm@ti.com

Applied to u-boot/master, thanks!