commit ee322f3c79a86e6f26629f8535cddb2b844d5113
author Fabio Estevam <fabio.estevam@nxp.com> Wed Jun 20 15:08:21 2018 -0300
committer Tom Rini <trini@konsulko.com> Sat Jun 30 08:49:55 2018 -0400
tree eeac16a76bc3695975681174b0c88bfed5c46c12
parent 2121bbe49c27b2b2d865fac4e4071c5a90ae90b2

mx5: Select ARM_CORTEX_A8_CVE_2017_5715

On a 4.18-rc1 kernel the following warning is seen on i.MX51 and
i.MX53:

CPU0: Spectre v2: firmware did not set auxiliary control register IBE bit, system vulnerable

Select the ARM_CORTEX_A8_CVE_2017_5715 workaround for i.MX51/i.MX53
to fix the problem.

With this patch applied the kernel reports:

CPU0: Spectre v2: using BPIALL workaround

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>

arch/arm/mach-imx/mx5/Kconfig

diff --git a/arch/arm/mach-imx/mx5/Kconfig b/arch/arm/mach-imx/mx5/Kconfig
index 06322b2..100257b 100644
--- a/arch/arm/mach-imx/mx5/Kconfig
+++ b/arch/arm/mach-imx/mx5/Kconfig
@@ -8,9 +8,11 @@
 config MX51
 	bool
 	select SYS_FSL_ERRATUM_ESDHC_A001
+	select ARM_CORTEX_A8_CVE_2017_5715
 
 config MX53
 	bool
+	select ARM_CORTEX_A8_CVE_2017_5715
 
 choice
 	prompt "MX5 board select"