1 files changed, 137 insertions, 0 deletions
diff --git a/include/linux/kernel_stat.h b/include/linux/kernel_stat.h
new file mode 100644
index 000000000..9935f7ecb
--- /dev/null
+++ b/include/linux/kernel_stat.h
@@ -0,0 +1,137 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _LINUX_KERNEL_STAT_H
+#define _LINUX_KERNEL_STAT_H
+
+#include <linux/smp.h>
+#include <linux/threads.h>
+#include <linux/percpu.h>
+#include <linux/cpumask.h>
+#include <linux/interrupt.h>
+#include <linux/sched.h>
+#include <linux/vtime.h>
+#include <asm/irq.h>
+
+/*
+ * 'kernel_stat.h' contains the definitions needed for doing
+ * some kernel statistics (CPU usage, context switches ...),
+ * used by rstatd/perfmeter
+ */
+
+enum cpu_usage_stat {
+	CPUTIME_USER,
+	CPUTIME_NICE,
+	CPUTIME_SYSTEM,
+	CPUTIME_SOFTIRQ,
+	CPUTIME_IRQ,
+	CPUTIME_IDLE,
+	CPUTIME_IOWAIT,
+	CPUTIME_STEAL,
+	CPUTIME_GUEST,
+	CPUTIME_GUEST_NICE,
+#ifdef CONFIG_SCHED_CORE
+	CPUTIME_FORCEIDLE,
+#endif
+	NR_STATS,
+};
+
+struct kernel_cpustat {
+	u64 cpustat[NR_STATS];
+};
+
+struct kernel_stat {
+	unsigned long irqs_sum;
+	unsigned int softirqs[NR_SOFTIRQS];
+};
+
+DECLARE_PER_CPU(struct kernel_stat, kstat);
+DECLARE_PER_CPU(struct kernel_cpustat, kernel_cpustat);
+
+/* Must have preemption disabled for this to be meaningful. */
+#define kstat_this_cpu this_cpu_ptr(&kstat)
+#define kcpustat_this_cpu this_cpu_ptr(&kernel_cpustat)
+#define kstat_cpu(cpu) per_cpu(kstat, cpu)
+#define kcpustat_cpu(cpu) per_cpu(kernel_cpustat, cpu)
+
+extern unsigned long long nr_context_switches_cpu(int cpu);
+extern unsigned long long nr_context_switches(void);
+
+extern unsigned int kstat_irqs_cpu(unsigned int irq, int cpu);
+extern void kstat_incr_irq_this_cpu(unsigned int irq);
+
+static inline void kstat_incr_softirqs_this_cpu(unsigned int irq)
+{
+	__this_cpu_inc(kstat.softirqs[irq]);
+}
+
+static inline unsigned int kstat_softirqs_cpu(unsigned int irq, int cpu)
+{
+       return kstat_cpu(cpu).softirqs[irq];
+}
+
+static inline unsigned int kstat_cpu_softirqs_sum(int cpu)
+{
+	int i;
+	unsigned int sum = 0;
+
+	for (i = 0; i < NR_SOFTIRQS; i++)
+		sum += kstat_softirqs_cpu(i, cpu);
+
+	return sum;
+}
+
+/*
+ * Number of interrupts per specific IRQ source, since bootup
+ */
+extern unsigned int kstat_irqs_usr(unsigned int irq);
+
+/*
+ * Number of interrupts per cpu, since bootup
+ */
+static inline unsigned long kstat_cpu_irqs_sum(unsigned int cpu)
+{
+	return kstat_cpu(cpu).irqs_sum;
+}
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_GEN
+extern u64 kcpustat_field(struct kernel_cpustat *kcpustat,
+			  enum cpu_usage_stat usage, int cpu);
+extern void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu);
+#else
+static inline u64 kcpustat_field(struct kernel_cpustat *kcpustat,
+				 enum cpu_usage_stat usage, int cpu)
+{
+	return kcpustat->cpustat[usage];
+}
+
+static inline void kcpustat_cpu_fetch(struct kernel_cpustat *dst, int cpu)
+{
+	*dst = kcpustat_cpu(cpu);
+}
+
+#endif
+
+extern void account_user_time(struct task_struct *, u64);
+extern void account_guest_time(struct task_struct *, u64);
+extern void account_system_time(struct task_struct *, int, u64);
+extern void account_system_index_time(struct task_struct *, u64,
+				      enum cpu_usage_stat);
+extern void account_steal_time(u64);
+extern void account_idle_time(u64);
+extern u64 get_idle_time(struct kernel_cpustat *kcs, int cpu);
+
+#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
+static inline void account_process_tick(struct task_struct *tsk, int user)
+{
+	vtime_flush(tsk);
+}
+#else
+extern void account_process_tick(struct task_struct *, int user);
+#endif
+
+extern void account_idle_ticks(unsigned long ticks);
+
+#ifdef CONFIG_SCHED_CORE
+extern void __account_forceidle_time(struct task_struct *tsk, u64 delta);
+#endif
+
+#endif /* _LINUX_KERNEL_STAT_H */