#include <linux/irq_work.h>
#include <linux/irqdomain.h>
#include <linux/of.h>
+#include <linux/seq_file.h>
#include <linux/sched/task_stack.h>
#include <linux/sched/mm.h>
#include <linux/sched/hotplug.h>
#include <abi/fpu.h>
#endif
-struct ipi_data_struct {
- unsigned long bits ____cacheline_aligned;
-};
-static DEFINE_PER_CPU(struct ipi_data_struct, ipi_data);
-
enum ipi_message_type {
IPI_EMPTY,
IPI_RESCHEDULE,
IPI_MAX
};
+struct ipi_data_struct {
+ unsigned long bits ____cacheline_aligned;
+ unsigned long stats[IPI_MAX] ____cacheline_aligned;
+};
+static DEFINE_PER_CPU(struct ipi_data_struct, ipi_data);
+
static irqreturn_t handle_ipi(int irq, void *dev)
{
+ unsigned long *stats = this_cpu_ptr(&ipi_data)->stats;
+
while (true) {
unsigned long ops;
if (ops == 0)
return IRQ_HANDLED;
- if (ops & (1 << IPI_RESCHEDULE))
+ if (ops & (1 << IPI_RESCHEDULE)) {
+ stats[IPI_RESCHEDULE]++;
scheduler_ipi();
+ }
- if (ops & (1 << IPI_CALL_FUNC))
+ if (ops & (1 << IPI_CALL_FUNC)) {
+ stats[IPI_CALL_FUNC]++;
generic_smp_call_function_interrupt();
+ }
- if (ops & (1 << IPI_IRQ_WORK))
+ if (ops & (1 << IPI_IRQ_WORK)) {
+ stats[IPI_IRQ_WORK]++;
irq_work_run();
+ }
BUG_ON((ops >> IPI_MAX) != 0);
}
send_arch_ipi(to_whom);
}
+static const char * const ipi_names[] = {
+ [IPI_EMPTY] = "Empty interrupts",
+ [IPI_RESCHEDULE] = "Rescheduling interrupts",
+ [IPI_CALL_FUNC] = "Function call interrupts",
+ [IPI_IRQ_WORK] = "Irq work interrupts",
+};
+
+int arch_show_interrupts(struct seq_file *p, int prec)
+{
+ unsigned int cpu, i;
+
+ for (i = 0; i < IPI_MAX; i++) {
+ seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
+ prec >= 4 ? " " : "");
+ for_each_online_cpu(cpu)
+ seq_printf(p, "%10lu ",
+ per_cpu_ptr(&ipi_data, cpu)->stats[i]);
+ seq_printf(p, " %s\n", ipi_names[i]);
+ }
+
+ return 0;
+}
+
void arch_send_call_function_ipi_mask(struct cpumask *mask)
{
send_ipi_message(mask, IPI_CALL_FUNC);