forked from luck/tmp_suning_uos_patched
csky: Add arch_show_interrupts for IPI interrupts
Here is the result: cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 15: 1348 1299 952 1076 C-SKY SMP Intc 15 IPI Interrupt 16: 1203 1825 1598 1307 C-SKY SMP Intc 16 csky_mp_timer 43: 292 0 0 0 C-SKY SMP Intc 43 ttyS0 57: 106 0 0 0 C-SKY SMP Intc 57 virtio0 IPI0: 0 0 0 0 Empty interrupts IPI1: 19 41 45 27 Rescheduling interrupts IPI2: 1330 1259 908 1050 Function call interrupts IPI3: 0 0 0 0 Irq work interrupts Signed-off-by: Guo Ren <guoren@linux.alibaba.com> Cc: Arnd Bergmann <arnd@arndb.de>
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2c81b07682
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@ -15,6 +15,7 @@
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#include <linux/irq_work.h>
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#include <linux/irqdomain.h>
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#include <linux/of.h>
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#include <linux/seq_file.h>
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#include <linux/sched/task_stack.h>
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#include <linux/sched/mm.h>
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#include <linux/sched/hotplug.h>
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@ -27,11 +28,6 @@
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#include <abi/fpu.h>
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#endif
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struct ipi_data_struct {
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unsigned long bits ____cacheline_aligned;
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};
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static DEFINE_PER_CPU(struct ipi_data_struct, ipi_data);
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enum ipi_message_type {
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IPI_EMPTY,
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IPI_RESCHEDULE,
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@ -40,8 +36,16 @@ enum ipi_message_type {
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IPI_MAX
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};
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struct ipi_data_struct {
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unsigned long bits ____cacheline_aligned;
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unsigned long stats[IPI_MAX] ____cacheline_aligned;
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};
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static DEFINE_PER_CPU(struct ipi_data_struct, ipi_data);
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static irqreturn_t handle_ipi(int irq, void *dev)
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{
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unsigned long *stats = this_cpu_ptr(&ipi_data)->stats;
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while (true) {
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unsigned long ops;
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@ -49,14 +53,20 @@ static irqreturn_t handle_ipi(int irq, void *dev)
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if (ops == 0)
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return IRQ_HANDLED;
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if (ops & (1 << IPI_RESCHEDULE))
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if (ops & (1 << IPI_RESCHEDULE)) {
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stats[IPI_RESCHEDULE]++;
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scheduler_ipi();
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}
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if (ops & (1 << IPI_CALL_FUNC))
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if (ops & (1 << IPI_CALL_FUNC)) {
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stats[IPI_CALL_FUNC]++;
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generic_smp_call_function_interrupt();
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}
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if (ops & (1 << IPI_IRQ_WORK))
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if (ops & (1 << IPI_IRQ_WORK)) {
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stats[IPI_IRQ_WORK]++;
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irq_work_run();
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}
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BUG_ON((ops >> IPI_MAX) != 0);
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}
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@ -88,6 +98,29 @@ send_ipi_message(const struct cpumask *to_whom, enum ipi_message_type operation)
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send_arch_ipi(to_whom);
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}
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static const char * const ipi_names[] = {
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[IPI_EMPTY] = "Empty interrupts",
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[IPI_RESCHEDULE] = "Rescheduling interrupts",
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[IPI_CALL_FUNC] = "Function call interrupts",
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[IPI_IRQ_WORK] = "Irq work interrupts",
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};
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int arch_show_interrupts(struct seq_file *p, int prec)
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{
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unsigned int cpu, i;
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for (i = 0; i < IPI_MAX; i++) {
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seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
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prec >= 4 ? " " : "");
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for_each_online_cpu(cpu)
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seq_printf(p, "%10lu ",
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per_cpu_ptr(&ipi_data, cpu)->stats[i]);
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seq_printf(p, " %s\n", ipi_names[i]);
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}
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return 0;
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}
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void arch_send_call_function_ipi_mask(struct cpumask *mask)
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{
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send_ipi_message(mask, IPI_CALL_FUNC);
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