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| author | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2018-05-15 23:50:27 +0200 |
|---|---|---|
| committer | Christoph Muellner <christoph.muellner@theobroma-systems.com> | 2018-05-23 13:00:58 +0200 |
| commit | 2c78207c47daaaa3a05f1f5fef9927140d56f0c0 (patch) | |
| tree | f09b0714cf4f2ec6e04afb48597a764c69b3b1f6 | |
| parent | a7c5501f677041edd955a7f76f2cd695f2238f8e (diff) | |
arm64: Provide spectre v2 status via generic CPU vulnerability folder.
This patch enables GENERIC_CPU_VULNERABILITIES on arm64 and
sets the spectre v2 status depending on the retpoline mitigation level.
Signed-off-by: Christoph Muellner <christoph.muellner@theobroma-systems.com>
| -rw-r--r-- | arch/arm64/Kconfig | 1 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpu_errata.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index c8c9f16e226f..b696de875d36 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -68,6 +68,7 @@ config ARM64 select GENERIC_CLOCKEVENTS select GENERIC_CLOCKEVENTS_BROADCAST select GENERIC_CPU_AUTOPROBE + select GENERIC_CPU_VULNERABILITIES select GENERIC_EARLY_IOREMAP select GENERIC_IDLE_POLL_SETUP select GENERIC_IRQ_PROBE diff --git a/arch/arm64/kernel/cpu_errata.c b/arch/arm64/kernel/cpu_errata.c index d9bc01ef8ed3..14ad3a45b601 100644 --- a/arch/arm64/kernel/cpu_errata.c +++ b/arch/arm64/kernel/cpu_errata.c @@ -281,6 +281,18 @@ static inline const char *spectre_v2_module_string(void) return spectre_v2_bad_module ? " - vulnerable module loaded" : ""; } +#ifdef CONFIG_SYSFS + +ssize_t cpu_show_spectre_v2(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + return sprintf(buf, "%s%s\n", spectre_v2_strings[spectre_v2_enabled], + spectre_v2_module_string()); +} + +#endif + static void enable_retpoline(const struct arm64_cpu_capabilities *entry) { |