[PATCH 05/10] MIPS: smp: Implement IPI stats

Jiaxun Yang
2024-06-16T21:03:45Z

Show IPI statistics in arch_show_interrupts as what RISC-V
did.

Signed-off-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
---
arch/mips/include/asm/ipi.h | 9 +++++++++
arch/mips/kernel/irq.c | 4 ++++
arch/mips/kernel/smp.c | 13 +++++++++++++
3 files changed, 26 insertions(+)

diff --git a/arch/mips/include/asm/ipi.h b/arch/mips/include/asm/ipi.h
index 0fc8c31c6a52..1a486f0c934f 100644
--- a/arch/mips/include/asm/ipi.h
+++ b/arch/mips/include/asm/ipi.h
@@ -36,6 +36,7 @@ void mips_smp_ipi_disable(void);
extern bool mips_smp_ipi_have_virq_range(void);
void mips_smp_ipi_set_irqdomain(struct irq_domain *d);
extern void mips_smp_ipi_set_virq_range(int virq, int nr);
+extern void mips_smp_show_ipi_stats(struct seq_file *p, int prec);
#else
static inline void mips_smp_ipi_enable(void)
{
@@ -44,6 +45,10 @@ static inline void mips_smp_ipi_enable(void)
static inline void mips_smp_ipi_disable(void)
{
}
+
+static void mips_smp_show_ipi_stats(struct seq_file *p, int prec)
+{
+}
#endif /* CONFIG_GENERIC_IRQ_IPI */
#else
void mips_smp_ipi_set_virq_range(int virq, int nr)
@@ -58,5 +63,9 @@ static inline bool mips_smp_ipi_have_virq_range(void)
{
return false;
}
+
+static void mips_smp_show_ipi_stats(struct seq_file *p, int prec)
+{
+}
#endif /* CONFIG_SMP */
#endif
diff --git a/arch/mips/kernel/irq.c b/arch/mips/kernel/irq.c
index 5e11582fe308..c3ea8d80e0cb 100644
--- a/arch/mips/kernel/irq.c
+++ b/arch/mips/kernel/irq.c
@@ -26,6 +26,8 @@
#include <linux/atomic.h>
#include <linux/uaccess.h>

+#include <asm/ipi.h>
+
void *irq_stack[NR_CPUS];

/*
@@ -42,6 +44,8 @@ atomic_t irq_err_count;
int arch_show_interrupts(struct seq_file *p, int prec)
{
seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
+ mips_smp_show_ipi_stats(p, prec);
+
return 0;
}

diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index ddf96c28e2f0..826659214566 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -243,6 +243,19 @@ void mips_smp_ipi_disable(void)
disable_percpu_irq(ipi_virqs[i]);
}

+void mips_smp_show_ipi_stats(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, "%10u ", irq_desc_kstat_cpu(ipi_desc[i], cpu));
+ seq_printf(p, " %s\n", ipi_names[i]);
+ }
+}
+
static void smp_ipi_init_one(unsigned int virq, const char *name,
irq_handler_t handler)
{

--
2.43.0