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 c816e6f2730cd6e58e4dd98970c418c8a4c8eaec..b216bd5bfd204a4d01510e60d01d9c3574669711 100644 (file)
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -53,6 +53,10 @@ 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,
@@ -63,27 +67,17 @@ extern void unregister_cpu(struct cpu *cpu);
 extern ssize_t arch_cpu_probe(const char *, size_t);
 extern ssize_t arch_cpu_release(const char *, size_t);
 #endif
-struct notifier_block;
-
-#define CPU_ONLINE             0x0002 /* CPU (unsigned)v is up */
-#define CPU_UP_PREPARE         0x0003 /* CPU (unsigned)v coming up */
-#define CPU_DEAD               0x0007 /* CPU (unsigned)v dead */
-#define CPU_POST_DEAD          0x0009 /* CPU (unsigned)v dead, cpu_hotplug
-                                       * lock is dropped */
-#define CPU_BROKEN             0x000B /* CPU (unsigned)v did not die properly,
-                                       * perhaps due to preemption. */
-
-/* Used for CPU hotplug events occurring while tasks are frozen due to a suspend
- * operation in progress
- */
-#define CPU_TASKS_FROZEN       0x0010
 
-#define CPU_ONLINE_FROZEN      (CPU_ONLINE | CPU_TASKS_FROZEN)
-#define CPU_UP_PREPARE_FROZEN  (CPU_UP_PREPARE | CPU_TASKS_FROZEN)
-#define CPU_UP_CANCELED_FROZEN (CPU_UP_CANCELED | CPU_TASKS_FROZEN)
-#define CPU_DOWN_PREPARE_FROZEN        (CPU_DOWN_PREPARE | CPU_TASKS_FROZEN)
-#define CPU_DOWN_FAILED_FROZEN (CPU_DOWN_FAILED | CPU_TASKS_FROZEN)
-#define CPU_DEAD_FROZEN                (CPU_DEAD | CPU_TASKS_FROZEN)
+/*
+ * These states are not related to the core CPU hotplug mechanism. They are
+ * used by various (sub)architectures to track internal state
+ */
+#define CPU_ONLINE             0x0002 /* CPU is up */
+#define CPU_UP_PREPARE         0x0003 /* CPU coming up */
+#define CPU_DEAD               0x0007 /* CPU dead */
+#define CPU_DEAD_FROZEN                0x0008 /* CPU timed out on unplug */
+#define CPU_POST_DEAD          0x0009 /* CPU successfully unplugged */
+#define CPU_BROKEN             0x000B /* CPU did not die properly */
 
 #ifdef CONFIG_SMP
 extern bool cpuhp_tasks_frozen;
@@ -174,4 +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_ */