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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> | 2018-05-29 18:12:19 +0200 |
| commit | 82496fcaf250cd4f56609db644af8a32372eebb6 (patch) | |
| tree | c77fa52a05a46d076fc72dccfa54157c20a0e355 | |
| parent | e9593c62a1696f6d5112006d35ef02b088aa65df (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 7df0bafa6a6d..e888623baded 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 c1e2ee0144f6..4eb57ddf72ca 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 int enable_retpoline(void *data) { |