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| author | Marek Vasut <marek.vasut+renesas@gmail.com> | 2018-06-30 08:07:41 +0200 |
|---|---|---|
| committer | Marek Vasut <marex@denx.de> | 2018-07-25 00:14:19 +0200 |
| commit | a6759e3dfca217ba8cc518edcd4972671a97109a (patch) | |
| tree | 0bbe6f7ee422ea36951ba197fd602572154e9c82 /arch/arm/mach-rmobile | |
| parent | 323a73adc9a1bf2de43fe03bdd9c3038ce7c2784 (diff) | |
| download | u-boot-a6759e3dfca217ba8cc518edcd4972671a97109a.tar.gz | |
ARM: rmobile: gen2: Enable ACTLR[0] (Enable invalidates of BTB) to facilitate CVE_2017-5715 WA in OS
Enable CVE_2017_5715 mitigation on CPU0 on R-Car H2, M2W, M2N, V2H,
which all contain Cortex-A15 cores. R-Car E2 contains only Cortex-A7
cores and is not affected. 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 other CPUs
than CPU0 and may require additional kernel patches for the
other CPUs in SMP configurations.
Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nishanth Menon <nm@ti.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Diffstat (limited to 'arch/arm/mach-rmobile')
| -rw-r--r-- | arch/arm/mach-rmobile/Kconfig.32 | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm/mach-rmobile/Kconfig.32 b/arch/arm/mach-rmobile/Kconfig.32 index c0b5b2457c..6c492ff409 100644 --- a/arch/arm/mach-rmobile/Kconfig.32 +++ b/arch/arm/mach-rmobile/Kconfig.32 @@ -13,18 +13,22 @@ config R8A7740 config R8A7790 bool "Renesas SoC R8A7790" select RCAR_GEN2 + select ARM_CORTEX_A15_CVE_2017_5715 config R8A7791 bool "Renesas SoC R8A7791" select RCAR_GEN2 + select ARM_CORTEX_A15_CVE_2017_5715 config R8A7792 bool "Renesas SoC R8A7792" select RCAR_GEN2 + select ARM_CORTEX_A15_CVE_2017_5715 config R8A7793 bool "Renesas SoC R8A7793" select RCAR_GEN2 + select ARM_CORTEX_A15_CVE_2017_5715 config R8A7794 bool "Renesas SoC R8A7794" |