pktcdvd: Fix possible Spectre-v1 for pkt_devs

[mirror_ubuntu-bionic-kernel.git] / include / linux / cpu.h

diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index a04ef7c15c6a9dd504a288e23d7da3d6322459e2..b216bd5bfd204a4d01510e60d01d9c3574669711 100644 (file)
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -47,6 +47,17 @@ extern void cpu_remove_dev_attr(struct device_attribute *attr);
 extern int cpu_add_dev_attr_group(struct attribute_group *attrs);
 extern void cpu_remove_dev_attr_group(struct attribute_group *attrs);
 
+extern ssize_t cpu_show_meltdown(struct device *dev,
+                                struct device_attribute *attr, char *buf);
+extern ssize_t cpu_show_spectre_v1(struct device *dev,
+                                  struct device_attribute *attr, char *buf);
+extern ssize_t cpu_show_spectre_v2(struct device *dev,
+                                  struct device_attribute *attr, char *buf);
+extern ssize_t cpu_show_spec_store_bypass(struct device *dev,
+                                         struct device_attribute *attr, char *buf);
+extern ssize_t cpu_show_l1tf(struct device *dev,
+                            struct device_attribute *attr, char *buf);
+
 extern __printf(4, 5)
 struct device *cpu_device_create(struct device *parent, void *drvdata,
                                 const struct attribute_group **groups,
@@ -157,4 +168,23 @@ void cpuhp_report_idle_dead(void);
 static inline void cpuhp_report_idle_dead(void) { }
 #endif /* #ifdef CONFIG_HOTPLUG_CPU */
 
+enum cpuhp_smt_control {
+       CPU_SMT_ENABLED,
+       CPU_SMT_DISABLED,
+       CPU_SMT_FORCE_DISABLED,
+       CPU_SMT_NOT_SUPPORTED,
+};
+
+#if defined(CONFIG_SMP) && defined(CONFIG_HOTPLUG_SMT)
+extern enum cpuhp_smt_control cpu_smt_control;
+extern void cpu_smt_disable(bool force);
+extern void cpu_smt_check_topology_early(void);
+extern void cpu_smt_check_topology(void);
+#else
+# define cpu_smt_control               (CPU_SMT_ENABLED)
+static inline void cpu_smt_disable(bool force) { }
+static inline void cpu_smt_check_topology_early(void) { }
+static inline void cpu_smt_check_topology(void) { }
+#endif
+
 #endif /* _LINUX_CPU_H_ */