diff --git a/arch/alpha/kernel/irq.c b/arch/alpha/kernel/irq.c
index c67047c5d830..4a6a8b1d5a8b 100644
--- a/arch/alpha/kernel/irq.c
+++ b/arch/alpha/kernel/irq.c
@@ -72,16 +72,16 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	int j;
 
 #ifdef CONFIG_SMP
-	seq_puts(p, "IPI: ");
+	seq_puts(p, " IPI: ");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10lu ", cpu_data[j].ipi_count);
 	seq_putc(p, '\n');
 #endif
-	seq_puts(p, "PMI: ");
+	seq_puts(p, " PMI: ");
 	for_each_online_cpu(j)
 		seq_printf(p, "%10lu ", per_cpu(irq_pmi_count, j));
-	seq_puts(p, "          Performance Monitoring\n");
-	seq_printf(p, "ERR: %10lu\n", irq_err_count);
+	seq_puts(p, " Performance Monitoring\n");
+	seq_printf(p, " ERR: %10lu\n", irq_err_count);
 	return 0;
 }
 
diff --git a/arch/arm/kernel/smp.c b/arch/arm/kernel/smp.c
index 4e8e89a26ca3..b5fb4697bc3f 100644
--- a/arch/arm/kernel/smp.c
+++ b/arch/arm/kernel/smp.c
@@ -551,8 +551,7 @@ void show_ipi_list(struct seq_file *p, int prec)
 		if (!ipi_desc[i])
 			continue;
 
-		seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
-			   prec >= 4 ? " " : "");
+		seq_printf(p, "%*s%u:", prec - 1, "IPI", i);
 
 		for_each_online_cpu(cpu)
 			seq_printf(p, "%10u ", irq_desc_kstat_cpu(ipi_desc[i], cpu));
diff --git a/arch/arm64/kernel/smp.c b/arch/arm64/kernel/smp.c
index 1aa324104afb..1d0e0e6a5b92 100644
--- a/arch/arm64/kernel/smp.c
+++ b/arch/arm64/kernel/smp.c
@@ -833,11 +833,10 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	unsigned int cpu, i;
 
 	for (i = 0; i < MAX_IPI; i++) {
-		seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i,
-			   prec >= 4 ? " " : "");
+		seq_printf(p, "%*s%u: ", prec - 1, "IPI", i);
 		for_each_online_cpu(cpu)
 			seq_printf(p, "%10u ", irq_desc_kstat_cpu(get_ipi_desc(cpu, i), cpu));
-		seq_printf(p, "      %s\n", ipi_types[i]);
+		seq_printf(p, " %s\n", ipi_types[i]);
 	}
 
 	seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count);
diff --git a/arch/loongarch/kernel/smp.c b/arch/loongarch/kernel/smp.c
index 64a048f1b880..50922610758b 100644
--- a/arch/loongarch/kernel/smp.c
+++ b/arch/loongarch/kernel/smp.c
@@ -88,7 +88,7 @@ void show_ipi_list(struct seq_file *p, int prec)
 	unsigned int cpu, i;
 
 	for (i = 0; i < NR_IPI; i++) {
-		seq_printf(p, "%*s%u:%s", prec - 1, "IPI", i, prec >= 4 ? " " : "");
+		seq_printf(p, "%*s%u:", prec - 1, "IPI", i);
 		for_each_online_cpu(cpu)
 			seq_put_decimal_ull_width(p, " ", per_cpu(irq_stat, cpu).ipi_irqs[i], 10);
 		seq_printf(p, " LoongArch  %d  %s\n", i + 1, ipi_types[i]);
diff --git a/arch/riscv/kernel/smp.c b/arch/riscv/kernel/smp.c
index 5ed5095320e6..fa66f9c97d74 100644
--- a/arch/riscv/kernel/smp.c
+++ b/arch/riscv/kernel/smp.c
@@ -226,8 +226,7 @@ void 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 ? " " : "");
+		seq_printf(p, "%*s%u:", prec - 1, "IPI", i);
 		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]);
diff --git a/arch/sh/kernel/irq.c b/arch/sh/kernel/irq.c
index 9022d8af9d68..03c39b5da50f 100644
--- a/arch/sh/kernel/irq.c
+++ b/arch/sh/kernel/irq.c
@@ -46,7 +46,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	seq_printf(p, "%*s:", prec, "NMI");
 	for_each_online_cpu(j)
 		seq_put_decimal_ull_width(p, " ", per_cpu(irq_stat.__nmi_count, j), 10);
-	seq_printf(p, "  Non-maskable interrupts\n");
+	seq_printf(p, " Non-maskable interrupts\n");
 
 	seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
 
diff --git a/arch/sparc/kernel/irq_32.c b/arch/sparc/kernel/irq_32.c
index 5210991429d5..22db727652ba 100644
--- a/arch/sparc/kernel/irq_32.c
+++ b/arch/sparc/kernel/irq_32.c
@@ -199,19 +199,19 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	int j;
 
 #ifdef CONFIG_SMP
-	seq_printf(p, "RES:");
+	seq_printf(p, "%*s:", prec, "RES");
 	for_each_online_cpu(j)
 		seq_put_decimal_ull_width(p, " ", cpu_data(j).irq_resched_count, 10);
-	seq_printf(p, "     IPI rescheduling interrupts\n");
-	seq_printf(p, "CAL:");
+	seq_printf(p, " IPI rescheduling interrupts\n");
+	seq_printf(p, "%*s:", prec, "CAL");
 	for_each_online_cpu(j)
 		seq_put_decimal_ull_width(p, " ", cpu_data(j).irq_call_count, 10);
-	seq_printf(p, "     IPI function call interrupts\n");
+	seq_printf(p, " IPI function call interrupts\n");
 #endif
-	seq_printf(p, "NMI:");
+	seq_printf(p, "%*s:", prec, "NMI");
 	for_each_online_cpu(j)
 		seq_put_decimal_ull_width(p, " ", cpu_data(j).counter, 10);
-	seq_printf(p, "     Non-maskable interrupts\n");
+	seq_printf(p, " Non-maskable interrupts\n");
 	return 0;
 }
 
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index c5466a9fd560..3f55c69d5f3b 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -303,10 +303,10 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 {
 	int j;
 
-	seq_printf(p, "NMI:");
+	seq_printf(p, "%*s:", prec, "NMI");
 	for_each_online_cpu(j)
 		seq_put_decimal_ull_width(p, " ", cpu_data(j).__nmi_count, 10);
-	seq_printf(p, "     Non-maskable interrupts\n");
+	seq_printf(p, " Non-maskable interrupts\n");
 	return 0;
 }
 
diff --git a/arch/um/kernel/irq.c b/arch/um/kernel/irq.c
index 5929d498b65f..ddfd6e9bd8c7 100644
--- a/arch/um/kernel/irq.c
+++ b/arch/um/kernel/irq.c
@@ -716,12 +716,12 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	seq_printf(p, "%*s: ", prec, "RES");
 	for_each_online_cpu(cpu)
 		seq_printf(p, "%10u ", irq_stats(cpu)->irq_resched_count);
-	seq_puts(p, "  Rescheduling interrupts\n");
+	seq_puts(p, " Rescheduling interrupts\n");
 
 	seq_printf(p, "%*s: ", prec, "CAL");
 	for_each_online_cpu(cpu)
 		seq_printf(p, "%10u ", irq_stats(cpu)->irq_call_count);
-	seq_puts(p, "  Function call interrupts\n");
+	seq_puts(p, " Function call interrupts\n");
 #endif
 
 	return 0;
diff --git a/arch/x86/events/amd/core.c b/arch/x86/events/amd/core.c
index 0c92ed5f464b..305774b67995 100644
--- a/arch/x86/events/amd/core.c
+++ b/arch/x86/events/amd/core.c
@@ -1032,7 +1032,7 @@ static int amd_pmu_v2_handle_irq(struct pt_regs *regs)
 	 * Unmasking the LVTPC is not required as the Mask (M) bit of the LVT
 	 * PMI entry is not set by the local APIC when a PMC overflow occurs
 	 */
-	inc_irq_stat(apic_perf_irqs);
+	inc_perf_irq_stat();
 
 done:
 	cpuc->enabled = pmu_enabled;
diff --git a/arch/x86/events/amd/ibs.c b/arch/x86/events/amd/ibs.c
index e0bd5051db2a..ed18a6d7e1a8 100644
--- a/arch/x86/events/amd/ibs.c
+++ b/arch/x86/events/amd/ibs.c
@@ -1600,7 +1600,7 @@ perf_ibs_nmi_handler(unsigned int cmd, struct pt_regs *regs)
 	handled += perf_ibs_handle_irq(&perf_ibs_op, regs);
 
 	if (handled)
-		inc_irq_stat(apic_perf_irqs);
+		inc_perf_irq_stat();
 
 	perf_sample_event_took(sched_clock() - stamp);
 
diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c
index 4b9e105309c6..d1af33d96d0a 100644
--- a/arch/x86/events/core.c
+++ b/arch/x86/events/core.c
@@ -1753,7 +1753,7 @@ int x86_pmu_handle_irq(struct pt_regs *regs)
 	}
 
 	if (handled)
-		inc_irq_stat(apic_perf_irqs);
+		inc_perf_irq_stat();
 
 	return handled;
 }
diff --git a/arch/x86/events/intel/core.c b/arch/x86/events/intel/core.c
index dd1e3aa75ee9..1b5ec78076ae 100644
--- a/arch/x86/events/intel/core.c
+++ b/arch/x86/events/intel/core.c
@@ -3531,7 +3531,7 @@ static int handle_pmi_common(struct pt_regs *regs, u64 status)
 	int bit;
 	int handled = 0;
 
-	inc_irq_stat(apic_perf_irqs);
+	inc_perf_irq_stat();
 
 	/*
 	 * Ignore a range of extra bits in status that do not indicate
diff --git a/arch/x86/events/intel/knc.c b/arch/x86/events/intel/knc.c
index e614baf42926..e887adc108ac 100644
--- a/arch/x86/events/intel/knc.c
+++ b/arch/x86/events/intel/knc.c
@@ -238,7 +238,7 @@ static int knc_pmu_handle_irq(struct pt_regs *regs)
 		goto done;
 	}
 
-	inc_irq_stat(apic_perf_irqs);
+	inc_perf_irq_stat();
 
 	for_each_set_bit(bit, (unsigned long *)&status, X86_PMC_IDX_MAX) {
 		struct perf_event *event = cpuc->events[bit];
diff --git a/arch/x86/events/intel/p4.c b/arch/x86/events/intel/p4.c
index 02bfdb77158b..5368dc31787c 100644
--- a/arch/x86/events/intel/p4.c
+++ b/arch/x86/events/intel/p4.c
@@ -1077,7 +1077,7 @@ static int p4_pmu_handle_irq(struct pt_regs *regs)
 	}
 
 	if (handled)
-		inc_irq_stat(apic_perf_irqs);
+		inc_perf_irq_stat();
 
 	/*
 	 * When dealing with the unmasking of the LVTPC on P4 perf hw, it has
diff --git a/arch/x86/events/zhaoxin/core.c b/arch/x86/events/zhaoxin/core.c
index 4bdfcf091200..4bc177badac2 100644
--- a/arch/x86/events/zhaoxin/core.c
+++ b/arch/x86/events/zhaoxin/core.c
@@ -373,7 +373,7 @@ static int zhaoxin_pmu_handle_irq(struct pt_regs *regs)
 	else
 		zhaoxin_pmu_ack_status(status);
 
-	inc_irq_stat(apic_perf_irqs);
+	inc_perf_irq_stat();
 
 	/*
 	 * CondChgd bit 63 doesn't mean any overflow status. Ignore
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c
index 323adc93f2dc..55a8b6de2865 100644
--- a/arch/x86/hyperv/hv_init.c
+++ b/arch/x86/hyperv/hv_init.c
@@ -219,7 +219,7 @@ static inline bool hv_reenlightenment_available(void)
 DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_reenlightenment)
 {
 	apic_eoi();
-	inc_irq_stat(irq_hv_reenlightenment_count);
+	inc_irq_stat(HYPERV_REENLIGHTENMENT);
 	schedule_delayed_work(&hv_reenlightenment_work, HZ/10);
 }
 
diff --git a/arch/x86/include/asm/hardirq.h b/arch/x86/include/asm/hardirq.h
index 9314642ae93c..dea60d66d976 100644
--- a/arch/x86/include/asm/hardirq.h
+++ b/arch/x86/include/asm/hardirq.h
@@ -4,51 +4,64 @@
 
 #include <linux/threads.h>
 
+enum irq_stat_counts {
+	IRQ_COUNT_NMI,
+#ifdef CONFIG_X86_LOCAL_APIC
+	IRQ_COUNT_APIC_TIMER,
+	IRQ_COUNT_SPURIOUS,
+	IRQ_COUNT_APIC_PERF,
+	IRQ_COUNT_IRQ_WORK,
+	IRQ_COUNT_ICR_READ_RETRY,
+	IRQ_COUNT_X86_PLATFORM_IPI,
+#endif
+#ifdef CONFIG_SMP
+	IRQ_COUNT_RESCHEDULE,
+	IRQ_COUNT_CALL_FUNCTION,
+#endif
+	IRQ_COUNT_TLB,
+#ifdef CONFIG_X86_THERMAL_VECTOR
+	IRQ_COUNT_THERMAL_APIC,
+#endif
+#ifdef CONFIG_X86_MCE_THRESHOLD
+	IRQ_COUNT_THRESHOLD_APIC,
+#endif
+#ifdef CONFIG_X86_MCE_AMD
+	IRQ_COUNT_DEFERRED_ERROR,
+#endif
+#ifdef CONFIG_X86_MCE
+	IRQ_COUNT_MCE_EXCEPTION,
+	IRQ_COUNT_MCE_POLL,
+#endif
+#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
+	IRQ_COUNT_HYPERVISOR_CALLBACK,
+#endif
+#if IS_ENABLED(CONFIG_HYPERV)
+	IRQ_COUNT_HYPERV_REENLIGHTENMENT,
+	IRQ_COUNT_HYPERV_STIMER0,
+#endif
+#if IS_ENABLED(CONFIG_KVM)
+	IRQ_COUNT_POSTED_INTR,
+	IRQ_COUNT_POSTED_INTR_NESTED,
+	IRQ_COUNT_POSTED_INTR_WAKEUP,
+#endif
+#ifdef CONFIG_GUEST_PERF_EVENTS
+	IRQ_COUNT_PERF_GUEST_MEDIATED_PMI,
+#endif
+#ifdef CONFIG_X86_POSTED_MSI
+	IRQ_COUNT_POSTED_MSI_NOTIFICATION,
+#endif
+	IRQ_COUNT_PIC_APIC_ERROR,
+#ifdef CONFIG_X86_IO_APIC
+	IRQ_COUNT_IOAPIC_MISROUTED,
+#endif
+	IRQ_COUNT_MAX,
+};
+
 typedef struct {
 #if IS_ENABLED(CONFIG_CPU_MITIGATIONS) && IS_ENABLED(CONFIG_KVM_INTEL)
 	u8	     kvm_cpu_l1tf_flush_l1d;
 #endif
-	unsigned int __nmi_count;	/* arch dependent */
-#ifdef CONFIG_X86_LOCAL_APIC
-	unsigned int apic_timer_irqs;	/* arch dependent */
-	unsigned int irq_spurious_count;
-	unsigned int icr_read_retry_count;
-#endif
-#if IS_ENABLED(CONFIG_KVM)
-	unsigned int kvm_posted_intr_ipis;
-	unsigned int kvm_posted_intr_wakeup_ipis;
-	unsigned int kvm_posted_intr_nested_ipis;
-#endif
-#ifdef CONFIG_GUEST_PERF_EVENTS
-	unsigned int perf_guest_mediated_pmis;
-#endif
-	unsigned int x86_platform_ipis;	/* arch dependent */
-	unsigned int apic_perf_irqs;
-	unsigned int apic_irq_work_irqs;
-#ifdef CONFIG_SMP
-	unsigned int irq_resched_count;
-	unsigned int irq_call_count;
-#endif
-	unsigned int irq_tlb_count;
-#ifdef CONFIG_X86_THERMAL_VECTOR
-	unsigned int irq_thermal_count;
-#endif
-#ifdef CONFIG_X86_MCE_THRESHOLD
-	unsigned int irq_threshold_count;
-#endif
-#ifdef CONFIG_X86_MCE_AMD
-	unsigned int irq_deferred_error_count;
-#endif
-#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
-	unsigned int irq_hv_callback_count;
-#endif
-#if IS_ENABLED(CONFIG_HYPERV)
-	unsigned int irq_hv_reenlightenment_count;
-	unsigned int hyperv_stimer0_count;
-#endif
-#ifdef CONFIG_X86_POSTED_MSI
-	unsigned int posted_msi_notification_count;
-#endif
+	unsigned int counts[IRQ_COUNT_MAX];
 } ____cacheline_aligned irq_cpustat_t;
 
 DECLARE_PER_CPU_SHARED_ALIGNED(irq_cpustat_t, irq_stat);
@@ -58,15 +71,21 @@ DECLARE_PER_CPU_ALIGNED(struct pi_desc, posted_msi_pi_desc);
 #endif
 #define __ARCH_IRQ_STAT
 
-#define inc_irq_stat(member)	this_cpu_inc(irq_stat.member)
+#define inc_irq_stat(index)	this_cpu_inc(irq_stat.counts[IRQ_COUNT_##index])
+void irq_stat_inc_and_enable(enum irq_stat_counts which);
+
+#ifdef CONFIG_X86_LOCAL_APIC
+#define inc_perf_irq_stat()	inc_irq_stat(APIC_PERF)
+#else
+#define inc_perf_irq_stat()	do { } while (0)
+#endif
 
 extern void ack_bad_irq(unsigned int irq);
 
+#ifdef CONFIG_PROC_FS
 extern u64 arch_irq_stat_cpu(unsigned int cpu);
 #define arch_irq_stat_cpu	arch_irq_stat_cpu
-
-extern u64 arch_irq_stat(void);
-#define arch_irq_stat		arch_irq_stat
+#endif
 
 DECLARE_PER_CPU_CACHE_HOT(u16, __softirq_pending);
 #define local_softirq_pending_ref       __softirq_pending
diff --git a/arch/x86/include/asm/hw_irq.h b/arch/x86/include/asm/hw_irq.h
index cbe19e669080..47727d0b540b 100644
--- a/arch/x86/include/asm/hw_irq.h
+++ b/arch/x86/include/asm/hw_irq.h
@@ -110,10 +110,6 @@ static inline void lock_vector_lock(void) {}
 static inline void unlock_vector_lock(void) {}
 #endif
 
-/* Statistics */
-extern atomic_t irq_err_count;
-extern atomic_t irq_mis_count;
-
 extern void elcr_set_level_irq(unsigned int irq);
 
 extern char irq_entries_start[];
diff --git a/arch/x86/include/asm/mce.h b/arch/x86/include/asm/mce.h
index 0175d39a5856..e575b702063d 100644
--- a/arch/x86/include/asm/mce.h
+++ b/arch/x86/include/asm/mce.h
@@ -291,9 +291,6 @@ bool mce_is_memory_error(struct mce *m);
 bool mce_is_correctable(struct mce *m);
 bool mce_usable_address(struct mce *m);
 
-DECLARE_PER_CPU(unsigned, mce_exception_count);
-DECLARE_PER_CPU(unsigned, mce_poll_count);
-
 typedef DECLARE_BITMAP(mce_banks_t, MAX_NR_BANKS);
 DECLARE_PER_CPU(mce_banks_t, mce_poll_banks);
 
diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 639904911444..3eeebc2c5a1d 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1045,7 +1045,7 @@ static void local_apic_timer_interrupt(void)
 	/*
 	 * the NMI deadlock-detector uses this.
 	 */
-	inc_irq_stat(apic_timer_irqs);
+	inc_irq_stat(APIC_TIMER);
 
 	evt->event_handler(evt);
 }
@@ -2114,7 +2114,7 @@ static noinline void handle_spurious_interrupt(u8 vector)
 
 	trace_spurious_apic_entry(vector);
 
-	inc_irq_stat(irq_spurious_count);
+	irq_stat_inc_and_enable(IRQ_COUNT_SPURIOUS);
 
 	/*
 	 * If this is a spurious interrupt then do not acknowledge
@@ -2186,7 +2186,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_error_interrupt)
 		apic_write(APIC_ESR, 0);
 	v = apic_read(APIC_ESR);
 	apic_eoi();
-	atomic_inc(&irq_err_count);
+	irq_stat_inc_and_enable(IRQ_COUNT_PIC_APIC_ERROR);
 
 	apic_pr_debug("APIC error on CPU%d: %02x", smp_processor_id(), v);
 
diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c
index 352ed5558cbc..7d7175d01228 100644
--- a/arch/x86/kernel/apic/io_apic.c
+++ b/arch/x86/kernel/apic/io_apic.c
@@ -1575,8 +1575,6 @@ static unsigned int startup_ioapic_irq(struct irq_data *data)
 	return was_pending;
 }
 
-atomic_t irq_mis_count;
-
 #ifdef CONFIG_GENERIC_PENDING_IRQ
 static bool io_apic_level_ack_pending(struct mp_chip_data *data)
 {
@@ -1713,7 +1711,7 @@ static void ioapic_ack_level(struct irq_data *irq_data)
 	 * at the cpu.
 	 */
 	if (!(v & (1 << (i & 0x1f)))) {
-		atomic_inc(&irq_mis_count);
+		irq_stat_inc_and_enable(IRQ_COUNT_IOAPIC_MISROUTED);
 		eoi_ioapic_pin(cfg->vector, irq_data->chip_data);
 	}
 
diff --git a/arch/x86/kernel/apic/ipi.c b/arch/x86/kernel/apic/ipi.c
index 98a57cb4aa86..c627bee3b14f 100644
--- a/arch/x86/kernel/apic/ipi.c
+++ b/arch/x86/kernel/apic/ipi.c
@@ -120,7 +120,7 @@ u32 apic_mem_wait_icr_idle_timeout(void)
 	for (cnt = 0; cnt < 1000; cnt++) {
 		if (!(apic_read(APIC_ICR) & APIC_ICR_BUSY))
 			return 0;
-		inc_irq_stat(icr_read_retry_count);
+		irq_stat_inc_and_enable(IRQ_COUNT_ICR_READ_RETRY);
 		udelay(100);
 	}
 	return APIC_ICR_BUSY;
diff --git a/arch/x86/kernel/cpu/acrn.c b/arch/x86/kernel/cpu/acrn.c
index 2c5b51aad91a..dc119af83524 100644
--- a/arch/x86/kernel/cpu/acrn.c
+++ b/arch/x86/kernel/cpu/acrn.c
@@ -52,7 +52,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_acrn_hv_callback)
 	 * HYPERVISOR_CALLBACK_VECTOR.
 	 */
 	apic_eoi();
-	inc_irq_stat(irq_hv_callback_count);
+	inc_irq_stat(HYPERVISOR_CALLBACK);
 
 	if (acrn_intr_handler)
 		acrn_intr_handler();
diff --git a/arch/x86/kernel/cpu/mce/amd.c b/arch/x86/kernel/cpu/mce/amd.c
index 6605a0224659..222fa9cb181b 100644
--- a/arch/x86/kernel/cpu/mce/amd.c
+++ b/arch/x86/kernel/cpu/mce/amd.c
@@ -850,7 +850,7 @@ bool amd_mce_usable_address(struct mce *m)
 DEFINE_IDTENTRY_SYSVEC(sysvec_deferred_error)
 {
 	trace_deferred_error_apic_entry(DEFERRED_ERROR_VECTOR);
-	inc_irq_stat(irq_deferred_error_count);
+	inc_irq_stat(DEFERRED_ERROR);
 	deferred_error_int_vector();
 	trace_deferred_error_apic_exit(DEFERRED_ERROR_VECTOR);
 	apic_eoi();
diff --git a/arch/x86/kernel/cpu/mce/core.c b/arch/x86/kernel/cpu/mce/core.c
index f3a793e3a6c8..3c1faface683 100644
--- a/arch/x86/kernel/cpu/mce/core.c
+++ b/arch/x86/kernel/cpu/mce/core.c
@@ -67,8 +67,6 @@ static DEFINE_MUTEX(mce_sysfs_mutex);
 
 #define SPINUNIT		100	/* 100ns */
 
-DEFINE_PER_CPU(unsigned, mce_exception_count);
-
 DEFINE_PER_CPU_READ_MOSTLY(unsigned int, mce_num_banks);
 
 DEFINE_PER_CPU_READ_MOSTLY(struct mce_bank[MAX_NR_BANKS], mce_banks_array);
@@ -693,8 +691,6 @@ static noinstr void mce_read_aux(struct mce_hw_err *err, int i)
 	}
 }
 
-DEFINE_PER_CPU(unsigned, mce_poll_count);
-
 /*
  * We have three scenarios for checking for Deferred errors:
  *
@@ -797,7 +793,7 @@ void machine_check_poll(enum mcp_flags flags, mce_banks_t *b)
 	struct mce *m;
 	int i;
 
-	this_cpu_inc(mce_poll_count);
+	inc_irq_stat(MCE_POLL);
 
 	mce_gather_info(&err, NULL);
 	m = &err.m;
@@ -1572,7 +1568,7 @@ noinstr void do_machine_check(struct pt_regs *regs)
 	 */
 	lmce = 1;
 
-	this_cpu_inc(mce_exception_count);
+	inc_irq_stat(MCE_EXCEPTION);
 
 	mce_gather_info(&err, regs);
 	m = &err.m;
diff --git a/arch/x86/kernel/cpu/mce/threshold.c b/arch/x86/kernel/cpu/mce/threshold.c
index 0d13c9ffcba0..6c370d5af5bd 100644
--- a/arch/x86/kernel/cpu/mce/threshold.c
+++ b/arch/x86/kernel/cpu/mce/threshold.c
@@ -37,7 +37,7 @@ void (*mce_threshold_vector)(void) = default_threshold_interrupt;
 DEFINE_IDTENTRY_SYSVEC(sysvec_threshold)
 {
 	trace_threshold_apic_entry(THRESHOLD_APIC_VECTOR);
-	inc_irq_stat(irq_threshold_count);
+	inc_irq_stat(THRESHOLD_APIC);
 	mce_threshold_vector();
 	trace_threshold_apic_exit(THRESHOLD_APIC_VECTOR);
 	apic_eoi();
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index b5b6a58b67b0..9381102e884a 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -154,7 +154,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_callback)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
-	inc_irq_stat(irq_hv_callback_count);
+	inc_irq_stat(HYPERVISOR_CALLBACK);
 	if (mshv_handler)
 		mshv_handler();
 
@@ -193,7 +193,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_hyperv_stimer0)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
-	inc_irq_stat(hyperv_stimer0_count);
+	inc_irq_stat(HYPERV_STIMER0);
 	if (hv_stimer0_handler)
 		hv_stimer0_handler();
 	add_interrupt_randomness(HYPERV_STIMER0_VECTOR);
diff --git a/arch/x86/kernel/i8259.c b/arch/x86/kernel/i8259.c
index f67063df6723..f7a86b94a0dd 100644
--- a/arch/x86/kernel/i8259.c
+++ b/arch/x86/kernel/i8259.c
@@ -214,7 +214,7 @@ static void mask_and_ack_8259A(struct irq_data *data)
 			       "spurious 8259A interrupt: IRQ%d.\n", irq);
 			spurious_irq_mask |= irqmask;
 		}
-		atomic_inc(&irq_err_count);
+		irq_stat_inc_and_enable(IRQ_COUNT_PIC_APIC_ERROR);
 		/*
 		 * Theoretically we do not have to handle this IRQ,
 		 * but in Linux this does not cause problems and is
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index ec77be217eaf..30122f0b3af9 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -39,8 +39,6 @@ EXPORT_PER_CPU_SYMBOL(__softirq_pending);
 
 DEFINE_PER_CPU_CACHE_HOT(struct irq_stack *, hardirq_stack_ptr);
 
-atomic_t irq_err_count;
-
 /*
  * 'what should we do if we get a hw irq event on an illegal vector'.
  * each architecture has to answer this themselves.
@@ -62,150 +60,131 @@ void ack_bad_irq(unsigned int irq)
 	apic_eoi();
 }
 
-#define irq_stats(x)		(&per_cpu(irq_stat, x))
+struct irq_stat_info {
+	unsigned int	skip_vector;
+	const char	*symbol;
+	const char	*text;
+};
+
+#define DEFAULT_SUPPRESSED_VECTOR	UINT_MAX
+
+#define ISS(idx, sym, txt) [IRQ_COUNT_##idx] = { .symbol = sym, .text = txt }
+
+#define ITS(idx, sym, txt) [IRQ_COUNT_##idx] =				\
+	{ .skip_vector = idx## _VECTOR, .symbol = sym, .text = txt }
+
+#define IDS(idx, sym, txt) [IRQ_COUNT_##idx] =				\
+	{ .skip_vector = DEFAULT_SUPPRESSED_VECTOR, .symbol = sym, .text = txt }
+
+static const struct irq_stat_info irq_stat_info[IRQ_COUNT_MAX] = {
+	ISS(NMI,			"NMI",	"  Non-maskable interrupts\n"),
+#ifdef CONFIG_X86_LOCAL_APIC
+	ISS(APIC_TIMER,			"LOC",	"  Local timer interrupts\n"),
+	IDS(SPURIOUS,			"SPU",	"  Spurious interrupts\n"),
+	ISS(APIC_PERF,			"PMI",	"  Performance monitoring interrupts\n"),
+	ISS(IRQ_WORK,			"IWI",	"  IRQ work interrupts\n"),
+	IDS(ICR_READ_RETRY,		"RTR",	"  APIC ICR read retries\n"),
+	ISS(X86_PLATFORM_IPI,		"PLT",	"  Platform interrupts\n"),
+#endif
+#ifdef CONFIG_SMP
+	ISS(RESCHEDULE,			"RES",	"  Rescheduling interrupts\n"),
+	ISS(CALL_FUNCTION,		"CAL",	"  Function call interrupts\n"),
+#endif
+	ISS(TLB,			"TLB",	"  TLB shootdowns\n"),
+#ifdef CONFIG_X86_THERMAL_VECTOR
+	ISS(THERMAL_APIC,		"TRM",	"  Thermal event interrupts\n"),
+#endif
+#ifdef CONFIG_X86_MCE_THRESHOLD
+	ISS(THRESHOLD_APIC,		"THR",	"  Threshold APIC interrupts\n"),
+#endif
+#ifdef CONFIG_X86_MCE_AMD
+	ISS(DEFERRED_ERROR,		"DFR",	"  Deferred Error APIC interrupts\n"),
+#endif
+#ifdef CONFIG_X86_MCE
+	ISS(MCE_EXCEPTION,		"MCE",	"  Machine check exceptions\n"),
+	ISS(MCE_POLL,			"MCP",	"  Machine check polls\n"),
+#endif
+#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
+	ITS(HYPERVISOR_CALLBACK,	"HYP",	"  Hypervisor callback interrupts\n"),
+#endif
+#if IS_ENABLED(CONFIG_HYPERV)
+	ITS(HYPERV_REENLIGHTENMENT,	"HRE",	"  Hyper-V reenlightenment interrupts\n"),
+	ITS(HYPERV_STIMER0,		"HVS",	"  Hyper-V stimer0 interrupts\n"),
+#endif
+#if IS_ENABLED(CONFIG_KVM)
+	ITS(POSTED_INTR,		"PIN",	"  Posted-interrupt notification event\n"),
+	ITS(POSTED_INTR_NESTED,		"NPI",	"  Nested posted-interrupt event\n"),
+	ITS(POSTED_INTR_WAKEUP,		"PIW",	"  Posted-interrupt wakeup event\n"),
+#endif
+#ifdef CONFIG_GUEST_PERF_EVENTS
+	ISS(PERF_GUEST_MEDIATED_PMI,	"VPMI",	"  Perf Guest Mediated PMI\n"),
+#endif
+#ifdef CONFIG_X86_POSTED_MSI
+	ISS(POSTED_MSI_NOTIFICATION,	"PMN",	"  Posted MSI notification event\n"),
+#endif
+	IDS(PIC_APIC_ERROR,		"ERR",	"  PIC/APIC error interrupts\n"),
+#ifdef CONFIG_X86_IO_APIC
+	IDS(IOAPIC_MISROUTED,		"MIS",	"  Misrouted IO/APIC interrupts\n"),
+#endif
+};
+
+static DECLARE_BITMAP(irq_stat_count_show, IRQ_COUNT_MAX) __read_mostly;
+
+static int __init irq_init_stats(void)
+{
+	const struct irq_stat_info *info = irq_stat_info;
+
+	for (unsigned int i = 0; i < ARRAY_SIZE(irq_stat_info); i++, info++) {
+		if (!info->skip_vector || (info->skip_vector != DEFAULT_SUPPRESSED_VECTOR &&
+					   test_bit(info->skip_vector, system_vectors)))
+			set_bit(i, irq_stat_count_show);
+	}
+
+#ifdef CONFIG_X86_LOCAL_APIC
+	if (!x86_platform_ipi_callback)
+		clear_bit(IRQ_COUNT_X86_PLATFORM_IPI, irq_stat_count_show);
+#endif
+
+#ifdef CONFIG_X86_POSTED_MSI
+	if (!posted_msi_enabled())
+		clear_bit(IRQ_COUNT_POSTED_MSI_NOTIFICATION, irq_stat_count_show);
+#endif
+
+#ifdef CONFIG_X86_MCE_AMD
+	if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD &&
+	    boot_cpu_data.x86_vendor != X86_VENDOR_HYGON)
+		clear_bit(IRQ_COUNT_DEFERRED_ERROR, irq_stat_count_show);
+#endif
+	return 0;
+}
+late_initcall(irq_init_stats);
+
+/*
+ * Used for default disabled counters to increment the stats and to enable the
+ * entry for /proc/interrupts output.
+ */
+void irq_stat_inc_and_enable(enum irq_stat_counts which)
+{
+	this_cpu_inc(irq_stat.counts[which]);
+	set_bit(which, irq_stat_count_show);
+}
+
+#ifdef CONFIG_PROC_FS
 /*
  * /proc/interrupts printing for arch specific interrupts
  */
 int arch_show_interrupts(struct seq_file *p, int prec)
 {
-	int j;
+	const struct irq_stat_info *info = irq_stat_info;
 
-	seq_printf(p, "%*s: ", prec, "NMI");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->__nmi_count);
-	seq_puts(p, "  Non-maskable interrupts\n");
-#ifdef CONFIG_X86_LOCAL_APIC
-	seq_printf(p, "%*s: ", prec, "LOC");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->apic_timer_irqs);
-	seq_puts(p, "  Local timer interrupts\n");
+	for (unsigned int i = 0; i < ARRAY_SIZE(irq_stat_info); i++, info++) {
+		if (!test_bit(i, irq_stat_count_show))
+			continue;
 
-	seq_printf(p, "%*s: ", prec, "SPU");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_spurious_count);
-	seq_puts(p, "  Spurious interrupts\n");
-	seq_printf(p, "%*s: ", prec, "PMI");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->apic_perf_irqs);
-	seq_puts(p, "  Performance monitoring interrupts\n");
-	seq_printf(p, "%*s: ", prec, "IWI");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->apic_irq_work_irqs);
-	seq_puts(p, "  IRQ work interrupts\n");
-	seq_printf(p, "%*s: ", prec, "RTR");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->icr_read_retry_count);
-	seq_puts(p, "  APIC ICR read retries\n");
-	if (x86_platform_ipi_callback) {
-		seq_printf(p, "%*s: ", prec, "PLT");
-		for_each_online_cpu(j)
-			seq_printf(p, "%10u ", irq_stats(j)->x86_platform_ipis);
-		seq_puts(p, "  Platform interrupts\n");
+		seq_printf(p, "%*s:", prec, info->symbol);
+		irq_proc_emit_counts(p, &irq_stat.counts[i]);
+		seq_puts(p, info->text);
 	}
-#endif
-#ifdef CONFIG_SMP
-	seq_printf(p, "%*s: ", prec, "RES");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_resched_count);
-	seq_puts(p, "  Rescheduling interrupts\n");
-	seq_printf(p, "%*s: ", prec, "CAL");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_call_count);
-	seq_puts(p, "  Function call interrupts\n");
-	seq_printf(p, "%*s: ", prec, "TLB");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_tlb_count);
-	seq_puts(p, "  TLB shootdowns\n");
-#endif
-#ifdef CONFIG_X86_THERMAL_VECTOR
-	seq_printf(p, "%*s: ", prec, "TRM");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_thermal_count);
-	seq_puts(p, "  Thermal event interrupts\n");
-#endif
-#ifdef CONFIG_X86_MCE_THRESHOLD
-	seq_printf(p, "%*s: ", prec, "THR");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_threshold_count);
-	seq_puts(p, "  Threshold APIC interrupts\n");
-#endif
-#ifdef CONFIG_X86_MCE_AMD
-	seq_printf(p, "%*s: ", prec, "DFR");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->irq_deferred_error_count);
-	seq_puts(p, "  Deferred Error APIC interrupts\n");
-#endif
-#ifdef CONFIG_X86_MCE
-	seq_printf(p, "%*s: ", prec, "MCE");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", per_cpu(mce_exception_count, j));
-	seq_puts(p, "  Machine check exceptions\n");
-	seq_printf(p, "%*s: ", prec, "MCP");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", per_cpu(mce_poll_count, j));
-	seq_puts(p, "  Machine check polls\n");
-#endif
-#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
-	if (test_bit(HYPERVISOR_CALLBACK_VECTOR, system_vectors)) {
-		seq_printf(p, "%*s: ", prec, "HYP");
-		for_each_online_cpu(j)
-			seq_printf(p, "%10u ",
-				   irq_stats(j)->irq_hv_callback_count);
-		seq_puts(p, "  Hypervisor callback interrupts\n");
-	}
-#endif
-#if IS_ENABLED(CONFIG_HYPERV)
-	if (test_bit(HYPERV_REENLIGHTENMENT_VECTOR, system_vectors)) {
-		seq_printf(p, "%*s: ", prec, "HRE");
-		for_each_online_cpu(j)
-			seq_printf(p, "%10u ",
-				   irq_stats(j)->irq_hv_reenlightenment_count);
-		seq_puts(p, "  Hyper-V reenlightenment interrupts\n");
-	}
-	if (test_bit(HYPERV_STIMER0_VECTOR, system_vectors)) {
-		seq_printf(p, "%*s: ", prec, "HVS");
-		for_each_online_cpu(j)
-			seq_printf(p, "%10u ",
-				   irq_stats(j)->hyperv_stimer0_count);
-		seq_puts(p, "  Hyper-V stimer0 interrupts\n");
-	}
-#endif
-	seq_printf(p, "%*s: %10u\n", prec, "ERR", atomic_read(&irq_err_count));
-#if defined(CONFIG_X86_IO_APIC)
-	seq_printf(p, "%*s: %10u\n", prec, "MIS", atomic_read(&irq_mis_count));
-#endif
-#if IS_ENABLED(CONFIG_KVM)
-	seq_printf(p, "%*s: ", prec, "PIN");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ", irq_stats(j)->kvm_posted_intr_ipis);
-	seq_puts(p, "  Posted-interrupt notification event\n");
-
-	seq_printf(p, "%*s: ", prec, "NPI");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ",
-			   irq_stats(j)->kvm_posted_intr_nested_ipis);
-	seq_puts(p, "  Nested posted-interrupt event\n");
-
-	seq_printf(p, "%*s: ", prec, "PIW");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ",
-			   irq_stats(j)->kvm_posted_intr_wakeup_ipis);
-	seq_puts(p, "  Posted-interrupt wakeup event\n");
-#endif
-#ifdef CONFIG_GUEST_PERF_EVENTS
-	seq_printf(p, "%*s: ", prec, "VPMI");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ",
-			   irq_stats(j)->perf_guest_mediated_pmis);
-	seq_puts(p, " Perf Guest Mediated PMI\n");
-#endif
-#ifdef CONFIG_X86_POSTED_MSI
-	seq_printf(p, "%*s: ", prec, "PMN");
-	for_each_online_cpu(j)
-		seq_printf(p, "%10u ",
-			   irq_stats(j)->posted_msi_notification_count);
-	seq_puts(p, "  Posted MSI notification event\n");
-#endif
 	return 0;
 }
 
@@ -214,46 +193,14 @@ int arch_show_interrupts(struct seq_file *p, int prec)
  */
 u64 arch_irq_stat_cpu(unsigned int cpu)
 {
-	u64 sum = irq_stats(cpu)->__nmi_count;
+	irq_cpustat_t *p = per_cpu_ptr(&irq_stat, cpu);
+	u64 sum = 0;
 
-#ifdef CONFIG_X86_LOCAL_APIC
-	sum += irq_stats(cpu)->apic_timer_irqs;
-	sum += irq_stats(cpu)->irq_spurious_count;
-	sum += irq_stats(cpu)->apic_perf_irqs;
-	sum += irq_stats(cpu)->apic_irq_work_irqs;
-	sum += irq_stats(cpu)->icr_read_retry_count;
-	if (x86_platform_ipi_callback)
-		sum += irq_stats(cpu)->x86_platform_ipis;
-#endif
-#ifdef CONFIG_SMP
-	sum += irq_stats(cpu)->irq_resched_count;
-	sum += irq_stats(cpu)->irq_call_count;
-#endif
-#ifdef CONFIG_X86_THERMAL_VECTOR
-	sum += irq_stats(cpu)->irq_thermal_count;
-#endif
-#ifdef CONFIG_X86_MCE_THRESHOLD
-	sum += irq_stats(cpu)->irq_threshold_count;
-#endif
-#ifdef CONFIG_X86_HV_CALLBACK_VECTOR
-	sum += irq_stats(cpu)->irq_hv_callback_count;
-#endif
-#if IS_ENABLED(CONFIG_HYPERV)
-	sum += irq_stats(cpu)->irq_hv_reenlightenment_count;
-	sum += irq_stats(cpu)->hyperv_stimer0_count;
-#endif
-#ifdef CONFIG_X86_MCE
-	sum += per_cpu(mce_exception_count, cpu);
-	sum += per_cpu(mce_poll_count, cpu);
-#endif
-	return sum;
-}
-
-u64 arch_irq_stat(void)
-{
-	u64 sum = atomic_read(&irq_err_count);
+	for (unsigned int i = 0; i < ARRAY_SIZE(irq_stat_info); i++)
+		sum += p->counts[i];
 	return sum;
 }
+#endif /* CONFIG_PROC_FS */
 
 static __always_inline void handle_irq(struct irq_desc *desc,
 				       struct pt_regs *regs)
@@ -338,7 +285,7 @@ DEFINE_IDTENTRY_IRQ(common_interrupt)
 
 #ifdef CONFIG_X86_LOCAL_APIC
 /* Function pointer for generic interrupt vector handling */
-void (*x86_platform_ipi_callback)(void) = NULL;
+void (*x86_platform_ipi_callback)(void) __ro_after_init = NULL;
 /*
  * Handler for X86_PLATFORM_IPI_VECTOR.
  */
@@ -348,7 +295,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_x86_platform_ipi)
 
 	apic_eoi();
 	trace_x86_platform_ipi_entry(X86_PLATFORM_IPI_VECTOR);
-	inc_irq_stat(x86_platform_ipis);
+	inc_irq_stat(X86_PLATFORM_IPI);
 	if (x86_platform_ipi_callback)
 		x86_platform_ipi_callback();
 	trace_x86_platform_ipi_exit(X86_PLATFORM_IPI_VECTOR);
@@ -363,7 +310,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_x86_platform_ipi)
 DEFINE_IDTENTRY_SYSVEC(sysvec_perf_guest_mediated_pmi_handler)
 {
 	 apic_eoi();
-	 inc_irq_stat(perf_guest_mediated_pmis);
+	 inc_irq_stat(PERF_GUEST_MEDIATED_PMI);
 	 perf_guest_handle_mediated_pmi();
 }
 #endif
@@ -389,7 +336,7 @@ EXPORT_SYMBOL_FOR_KVM(kvm_set_posted_intr_wakeup_handler);
 DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_kvm_posted_intr_ipi)
 {
 	apic_eoi();
-	inc_irq_stat(kvm_posted_intr_ipis);
+	inc_irq_stat(POSTED_INTR);
 }
 
 /*
@@ -398,7 +345,7 @@ DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_kvm_posted_intr_ipi)
 DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_wakeup_ipi)
 {
 	apic_eoi();
-	inc_irq_stat(kvm_posted_intr_wakeup_ipis);
+	inc_irq_stat(POSTED_INTR_WAKEUP);
 	kvm_posted_intr_wakeup_handler();
 }
 
@@ -408,7 +355,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_posted_intr_wakeup_ipi)
 DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_kvm_posted_intr_nested_ipi)
 {
 	apic_eoi();
-	inc_irq_stat(kvm_posted_intr_nested_ipis);
+	inc_irq_stat(POSTED_INTR_NESTED);
 }
 #endif
 
@@ -482,7 +429,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_posted_msi_notification)
 
 	/* Mark the handler active for intel_ack_posted_msi_irq() */
 	__this_cpu_write(posted_msi_handler_active, true);
-	inc_irq_stat(posted_msi_notification_count);
+	inc_irq_stat(POSTED_MSI_NOTIFICATION);
 	irq_enter();
 
 	/*
@@ -577,7 +524,7 @@ static void smp_thermal_vector(void)
 DEFINE_IDTENTRY_SYSVEC(sysvec_thermal)
 {
 	trace_thermal_apic_entry(THERMAL_APIC_VECTOR);
-	inc_irq_stat(irq_thermal_count);
+	inc_irq_stat(THERMAL_APIC);
 	smp_thermal_vector();
 	trace_thermal_apic_exit(THERMAL_APIC_VECTOR);
 	apic_eoi();
diff --git a/arch/x86/kernel/irq_work.c b/arch/x86/kernel/irq_work.c
index b0a24deab4a1..308c62411ff4 100644
--- a/arch/x86/kernel/irq_work.c
+++ b/arch/x86/kernel/irq_work.c
@@ -18,7 +18,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_irq_work)
 {
 	apic_eoi();
 	trace_irq_work_entry(IRQ_WORK_VECTOR);
-	inc_irq_stat(apic_irq_work_irqs);
+	inc_irq_stat(IRQ_WORK);
 	irq_work_run();
 	trace_irq_work_exit(IRQ_WORK_VECTOR);
 }
diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c
index 29226d112029..d1f3f320168c 100644
--- a/arch/x86/kernel/kvm.c
+++ b/arch/x86/kernel/kvm.c
@@ -304,7 +304,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_kvm_asyncpf_interrupt)
 
 	apic_eoi();
 
-	inc_irq_stat(irq_hv_callback_count);
+	inc_irq_stat(HYPERVISOR_CALLBACK);
 
 	if (__this_cpu_read(async_pf_enabled)) {
 		token = __this_cpu_read(apf_reason.token);
diff --git a/arch/x86/kernel/nmi.c b/arch/x86/kernel/nmi.c
index 52a3afb1b79e..3c9f60d6ca5a 100644
--- a/arch/x86/kernel/nmi.c
+++ b/arch/x86/kernel/nmi.c
@@ -576,7 +576,7 @@ DEFINE_IDTENTRY_RAW(exc_nmi)
 
 	irq_state = irqentry_nmi_enter(regs);
 
-	inc_irq_stat(__nmi_count);
+	inc_irq_stat(NMI);
 
 	if (IS_ENABLED(CONFIG_NMI_CHECK_CPU) && ignore_nmis) {
 		WRITE_ONCE(nsp->idt_ignored, nsp->idt_ignored + 1);
@@ -724,7 +724,7 @@ DEFINE_FREDENTRY_NMI(exc_nmi)
 
 	irq_state = irqentry_nmi_enter(regs);
 
-	inc_irq_stat(__nmi_count);
+	inc_irq_stat(NMI);
 	default_do_nmi(regs);
 
 	irqentry_nmi_exit(regs, irq_state);
diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c
index cbf95fe2b207..985103cab16c 100644
--- a/arch/x86/kernel/smp.c
+++ b/arch/x86/kernel/smp.c
@@ -250,7 +250,7 @@ DEFINE_IDTENTRY_SYSVEC_SIMPLE(sysvec_reschedule_ipi)
 {
 	apic_eoi();
 	trace_reschedule_entry(RESCHEDULE_VECTOR);
-	inc_irq_stat(irq_resched_count);
+	inc_irq_stat(RESCHEDULE);
 	scheduler_ipi();
 	trace_reschedule_exit(RESCHEDULE_VECTOR);
 }
@@ -259,7 +259,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_call_function)
 {
 	apic_eoi();
 	trace_call_function_entry(CALL_FUNCTION_VECTOR);
-	inc_irq_stat(irq_call_count);
+	inc_irq_stat(CALL_FUNCTION);
 	generic_smp_call_function_interrupt();
 	trace_call_function_exit(CALL_FUNCTION_VECTOR);
 }
@@ -268,7 +268,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_call_function_single)
 {
 	apic_eoi();
 	trace_call_function_single_entry(CALL_FUNCTION_SINGLE_VECTOR);
-	inc_irq_stat(irq_call_count);
+	inc_irq_stat(CALL_FUNCTION);
 	generic_smp_call_function_single_interrupt();
 	trace_call_function_single_exit(CALL_FUNCTION_SINGLE_VECTOR);
 }
diff --git a/arch/x86/mm/tlb.c b/arch/x86/mm/tlb.c
index af43d177087e..4c045f844492 100644
--- a/arch/x86/mm/tlb.c
+++ b/arch/x86/mm/tlb.c
@@ -1123,7 +1123,7 @@ static void flush_tlb_func(void *info)
 	VM_WARN_ON(!irqs_disabled());
 
 	if (!local) {
-		inc_irq_stat(irq_tlb_count);
+		inc_irq_stat(TLB);
 		count_vm_tlb_event(NR_TLB_REMOTE_FLUSH_RECEIVED);
 	}
 
diff --git a/arch/x86/xen/enlighten_hvm.c b/arch/x86/xen/enlighten_hvm.c
index 2f9fa27e5a3c..6c4eac4ff13a 100644
--- a/arch/x86/xen/enlighten_hvm.c
+++ b/arch/x86/xen/enlighten_hvm.c
@@ -125,7 +125,7 @@ DEFINE_IDTENTRY_SYSVEC(sysvec_xen_hvm_callback)
 	if (xen_percpu_upcall)
 		apic_eoi();
 
-	inc_irq_stat(irq_hv_callback_count);
+	inc_irq_stat(HYPERVISOR_CALLBACK);
 
 	xen_evtchn_do_upcall();
 
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index b310b91f2994..54a714077eee 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -722,7 +722,7 @@ static void __xen_pv_evtchn_do_upcall(struct pt_regs *regs)
 {
 	struct pt_regs *old_regs = set_irq_regs(regs);
 
-	inc_irq_stat(irq_hv_callback_count);
+	inc_irq_stat(HYPERVISOR_CALLBACK);
 
 	xen_evtchn_do_upcall();
 
diff --git a/arch/x86/xen/smp.c b/arch/x86/xen/smp.c
index 05f92c812ac8..05ee0d3b0874 100644
--- a/arch/x86/xen/smp.c
+++ b/arch/x86/xen/smp.c
@@ -23,7 +23,7 @@ static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id);
  */
 static irqreturn_t xen_reschedule_interrupt(int irq, void *dev_id)
 {
-	inc_irq_stat(irq_resched_count);
+	inc_irq_stat(RESCHEDULE);
 	scheduler_ipi();
 
 	return IRQ_HANDLED;
@@ -254,7 +254,7 @@ void xen_send_IPI_allbutself(int vector)
 static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
 {
 	generic_smp_call_function_interrupt();
-	inc_irq_stat(irq_call_count);
+	inc_irq_stat(CALL_FUNCTION);
 
 	return IRQ_HANDLED;
 }
@@ -262,7 +262,7 @@ static irqreturn_t xen_call_function_interrupt(int irq, void *dev_id)
 static irqreturn_t xen_call_function_single_interrupt(int irq, void *dev_id)
 {
 	generic_smp_call_function_single_interrupt();
-	inc_irq_stat(irq_call_count);
+	inc_irq_stat(CALL_FUNCTION);
 
 	return IRQ_HANDLED;
 }
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index db9b8e222b38..c2812f8177bb 100644
--- a/arch/x86/xen/smp_pv.c
+++ b/arch/x86/xen/smp_pv.c
@@ -400,7 +400,7 @@ static void xen_pv_stop_other_cpus(int wait)
 static irqreturn_t xen_irq_work_interrupt(int irq, void *dev_id)
 {
 	irq_work_run();
-	inc_irq_stat(apic_irq_work_irqs);
+	inc_irq_stat(IRQ_WORK);
 
 	return IRQ_HANDLED;
 }
diff --git a/arch/xtensa/kernel/irq.c b/arch/xtensa/kernel/irq.c
index b1e410f6b5ab..6f01f530868b 100644
--- a/arch/xtensa/kernel/irq.c
+++ b/arch/xtensa/kernel/irq.c
@@ -59,7 +59,7 @@ int arch_show_interrupts(struct seq_file *p, int prec)
 	seq_printf(p, "%*s:", prec, "NMI");
 	for_each_online_cpu(cpu)
 		seq_printf(p, " %10lu", per_cpu(nmi_count, cpu));
-	seq_puts(p, "   Non-maskable interrupts\n");
+	seq_puts(p, " Non-maskable interrupts\n");
 #endif
 	return 0;
 }
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 7b4db9c56e6a..8bc615ff84e5 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -16,7 +16,9 @@ proc-y	+= cmdline.o
 proc-y	+= consoles.o
 proc-y	+= cpuinfo.o
 proc-y	+= devices.o
-proc-y	+= interrupts.o
+ifneq ($(CONFIG_GENERIC_IRQ_SHOW),y)
+proc-y += interrupts.o
+endif
 proc-y	+= loadavg.o
 proc-y	+= meminfo.o
 proc-y	+= stat.o
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 8b444e862319..20c3df9a9b80 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -18,9 +18,6 @@
 #ifndef arch_irq_stat_cpu
 #define arch_irq_stat_cpu(cpu) 0
 #endif
-#ifndef arch_irq_stat
-#define arch_irq_stat() 0
-#endif
 
 u64 get_idle_time(struct kernel_cpustat *kcs, int cpu)
 {
@@ -122,7 +119,6 @@ static int show_stat(struct seq_file *p, void *v)
 			sum_softirq += softirq_stat;
 		}
 	}
-	sum += arch_irq_stat();
 
 	seq_put_decimal_ull(p, "cpu  ", nsec_to_clock_t(user));
 	seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index 6cd26ffb0505..3bf969ad8fe0 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -864,6 +864,7 @@ static inline void init_irq_proc(void)
 struct seq_file;
 int show_interrupts(struct seq_file *p, void *v);
 int arch_show_interrupts(struct seq_file *p, int prec);
+void irq_proc_emit_counts(struct seq_file *p, unsigned int __percpu *cnts);
 
 extern int early_irq_init(void);
 extern int arch_probe_nr_irqs(void);
diff --git a/include/linux/irq.h b/include/linux/irq.h
index efa514ee562f..f485369b1b4f 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -103,6 +103,7 @@ enum {
 	IRQ_DISABLE_UNLAZY	= (1 << 19),
 	IRQ_HIDDEN		= (1 << 20),
 	IRQ_NO_DEBUG		= (1 << 21),
+	IRQ_RESERVED		= (1 << 22),
 };
 
 #define IRQF_MODIFY_MASK	\
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index dae9a9b93665..8080db17c1b1 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -52,8 +52,8 @@ struct irq_redirect {
  * @depth:		disable-depth, for nested irq_disable() calls
  * @wake_depth:		enable depth, for multiple irq_set_irq_wake() callers
  * @tot_count:		stats field for non-percpu irqs
- * @irq_count:		stats field to detect stalled irqs
  * @last_unhandled:	aging timer for unhandled count
+ * @irq_count:		stats field to detect stalled irqs
  * @irqs_unhandled:	stats field for spurious unhandled interrupts
  * @threads_handled:	stats field for deferred spurious detection of threaded handlers
  * @threads_handled_last: comparator field for deferred spurious detection of threaded handlers
@@ -70,6 +70,7 @@ struct irq_redirect {
  *			IRQF_NO_SUSPEND set
  * @force_resume_depth:	number of irqactions on a irq descriptor with
  *			IRQF_FORCE_RESUME set
+ * @refcnt:		Reference count mainly for /proc/interrupts
  * @rcu:		rcu head for delayed free
  * @kobj:		kobject used to represent this struct in sysfs
  * @request_mutex:	mutex to protect request/free before locking desc->lock
@@ -87,9 +88,9 @@ struct irq_desc {
 	unsigned int		core_internal_state__do_not_mess_with_it;
 	unsigned int		depth;		/* nested irq disables */
 	unsigned int		wake_depth;	/* nested wake enables */
-	unsigned int		tot_count;
-	unsigned int		irq_count;	/* For detecting broken IRQs */
+	unsigned long		tot_count;
 	unsigned long		last_unhandled;	/* Aging timer for unhandled count */
+	unsigned int		irq_count;	/* For detecting broken IRQs */
 	unsigned int		irqs_unhandled;
 	atomic_t		threads_handled;
 	int			threads_handled_last;
@@ -119,6 +120,7 @@ struct irq_desc {
 	struct dentry		*debugfs_file;
 	const char		*dev_name;
 #endif
+	rcuref_t		refcnt;
 #ifdef CONFIG_SPARSE_IRQ
 	struct rcu_head		rcu;
 	struct kobject		kobj;
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index b635e3c5d5b6..de754db414d1 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -48,9 +48,11 @@ int irq_set_chip(unsigned int irq, const struct irq_chip *chip)
 		scoped_irqdesc->irq_data.chip = (struct irq_chip *)(chip ?: &no_irq_chip);
 		ret = 0;
 	}
-	/* For !CONFIG_SPARSE_IRQ make the irq show up in allocated_irqs. */
-	if (!ret)
+	if (!ret) {
+		/* For !CONFIG_SPARSE_IRQ make the irq show up in allocated_irqs. */
 		irq_mark_irq(irq);
+		irq_proc_update_chip(chip);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(irq_set_chip);
@@ -1012,6 +1014,7 @@ __irq_do_set_handler(struct irq_desc *desc, irq_flow_handler_t handle,
 		WARN_ON(irq_chip_pm_get(irq_desc_get_irq_data(desc)));
 		irq_activate_and_startup(desc, IRQ_RESEND);
 	}
+	irq_proc_update_valid(desc);
 }
 
 void __irq_set_handler(unsigned int irq, irq_flow_handler_t handle, int is_chained,
@@ -1072,6 +1075,7 @@ void irq_modify_status(unsigned int irq, unsigned long clr, unsigned long set)
 			trigger = tmp;
 
 		irqd_set(&desc->irq_data, trigger);
+		irq_proc_update_valid(desc);
 	}
 }
 EXPORT_SYMBOL_GPL(irq_modify_status);
diff --git a/kernel/irq/debugfs.h b/kernel/irq/debugfs.h
new file mode 100644
index 000000000000..8a9360d5fefb
--- /dev/null
+++ b/kernel/irq/debugfs.h
@@ -0,0 +1,44 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _KERNEL_IRQ_DEBUGFS_H
+#define _KERNEL_IRQ_DEBUGFS_H
+
+#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
+#include <linux/debugfs.h>
+
+struct irq_bit_descr {
+	unsigned int	mask;
+	char		*name;
+};
+
+#define BIT_MASK_DESCR(m)	{ .mask = m, .name = #m }
+
+void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
+			 const struct irq_bit_descr *sd, int size);
+
+void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc);
+static inline void irq_remove_debugfs_entry(struct irq_desc *desc)
+{
+	debugfs_remove(desc->debugfs_file);
+	kfree(desc->dev_name);
+}
+void irq_debugfs_copy_devname(int irq, struct device *dev);
+# ifdef CONFIG_IRQ_DOMAIN
+void irq_domain_debugfs_init(struct dentry *root);
+# else
+static inline void irq_domain_debugfs_init(struct dentry *root)
+{
+}
+# endif
+#else /* CONFIG_GENERIC_IRQ_DEBUGFS */
+static inline void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *d)
+{
+}
+static inline void irq_remove_debugfs_entry(struct irq_desc *d)
+{
+}
+static inline void irq_debugfs_copy_devname(int irq, struct device *dev)
+{
+}
+#endif /* CONFIG_GENERIC_IRQ_DEBUGFS */
+
+#endif
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 9412e57056f5..f9c099d45a64 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -9,8 +9,12 @@
 #include <linux/irqdesc.h>
 #include <linux/kernel_stat.h>
 #include <linux/pm_runtime.h>
+#include <linux/rcuref.h>
 #include <linux/sched/clock.h>
 
+#include "debugfs.h"
+#include "proc.h"
+
 #ifdef CONFIG_SPARSE_IRQ
 # define MAX_SPARSE_IRQS	INT_MAX
 #else
@@ -21,6 +25,7 @@
 
 extern bool noirqdebug;
 extern int irq_poll_cpu;
+extern unsigned int total_nr_irqs;
 
 extern struct irqaction chained_action;
 
@@ -100,9 +105,23 @@ extern void unmask_irq(struct irq_desc *desc);
 extern void unmask_threaded_irq(struct irq_desc *desc);
 
 #ifdef CONFIG_SPARSE_IRQ
-static inline void irq_mark_irq(unsigned int irq) { }
+static __always_inline void irq_mark_irq(unsigned int irq) { }
+void irq_desc_free_rcu(struct irq_desc *desc);
+
+static __always_inline bool irq_desc_get_ref(struct irq_desc *desc)
+{
+	return rcuref_get(&desc->refcnt);
+}
+
+static __always_inline void irq_desc_put_ref(struct irq_desc *desc)
+{
+	if (rcuref_put(&desc->refcnt))
+		irq_desc_free_rcu(desc);
+}
 #else
 extern void irq_mark_irq(unsigned int irq);
+static __always_inline bool irq_desc_get_ref(struct irq_desc *desc) { return true; }
+static __always_inline void irq_desc_put_ref(struct irq_desc *desc) { }
 #endif
 
 irqreturn_t __handle_irq_event_percpu(struct irq_desc *desc);
@@ -122,6 +141,7 @@ extern void register_irq_proc(unsigned int irq, struct irq_desc *desc);
 extern void unregister_irq_proc(unsigned int irq, struct irq_desc *desc);
 extern void register_handler_proc(unsigned int irq, struct irqaction *action);
 extern void unregister_handler_proc(unsigned int irq, struct irqaction *action);
+void irq_proc_update_valid(struct irq_desc *desc);
 #else
 static inline void register_irq_proc(unsigned int irq, struct irq_desc *desc) { }
 static inline void unregister_irq_proc(unsigned int irq, struct irq_desc *desc) { }
@@ -129,8 +149,11 @@ static inline void register_handler_proc(unsigned int irq,
 					 struct irqaction *action) { }
 static inline void unregister_handler_proc(unsigned int irq,
 					   struct irqaction *action) { }
+static inline void irq_proc_update_valid(struct irq_desc *desc) { }
 #endif
 
+struct irq_desc *irq_find_desc_at_or_after(unsigned int offset);
+
 extern bool irq_can_set_affinity_usr(unsigned int irq);
 
 extern int irq_do_set_affinity(struct irq_data *data,
@@ -372,42 +395,3 @@ static inline struct irq_data *irqd_get_parent_data(struct irq_data *irqd)
 	return NULL;
 #endif
 }
-
-#ifdef CONFIG_GENERIC_IRQ_DEBUGFS
-#include <linux/debugfs.h>
-
-struct irq_bit_descr {
-	unsigned int	mask;
-	char		*name;
-};
-
-#define BIT_MASK_DESCR(m)	{ .mask = m, .name = #m }
-
-void irq_debug_show_bits(struct seq_file *m, int ind, unsigned int state,
-			 const struct irq_bit_descr *sd, int size);
-
-void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *desc);
-static inline void irq_remove_debugfs_entry(struct irq_desc *desc)
-{
-	debugfs_remove(desc->debugfs_file);
-	kfree(desc->dev_name);
-}
-void irq_debugfs_copy_devname(int irq, struct device *dev);
-# ifdef CONFIG_IRQ_DOMAIN
-void irq_domain_debugfs_init(struct dentry *root);
-# else
-static inline void irq_domain_debugfs_init(struct dentry *root)
-{
-}
-# endif
-#else /* CONFIG_GENERIC_IRQ_DEBUGFS */
-static inline void irq_add_debugfs_entry(unsigned int irq, struct irq_desc *d)
-{
-}
-static inline void irq_remove_debugfs_entry(struct irq_desc *d)
-{
-}
-static inline void irq_debugfs_copy_devname(int irq, struct device *dev)
-{
-}
-#endif /* CONFIG_GENERIC_IRQ_DEBUGFS */
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 7173b8b634f2..80ef4e27dcf4 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -137,17 +137,18 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,
 	desc->tot_count = 0;
 	desc->name = NULL;
 	desc->owner = owner;
+	rcuref_init(&desc->refcnt, 1);
 	desc_smp_init(desc, node, affinity);
 }
 
-static unsigned int nr_irqs = NR_IRQS;
+unsigned int total_nr_irqs __read_mostly = NR_IRQS;
 
 /**
  * irq_get_nr_irqs() - Number of interrupts supported by the system.
  */
 unsigned int irq_get_nr_irqs(void)
 {
-	return nr_irqs;
+	return total_nr_irqs;
 }
 EXPORT_SYMBOL_GPL(irq_get_nr_irqs);
 
@@ -157,13 +158,12 @@ EXPORT_SYMBOL_GPL(irq_get_nr_irqs);
  *
  * Return: @nr.
  */
-unsigned int irq_set_nr_irqs(unsigned int nr)
+unsigned int __init irq_set_nr_irqs(unsigned int nr)
 {
-	nr_irqs = nr;
-
+	total_nr_irqs = nr;
+	irq_proc_calc_prec();
 	return nr;
 }
-EXPORT_SYMBOL_GPL(irq_set_nr_irqs);
 
 static DEFINE_MUTEX(sparse_irq_lock);
 static struct maple_tree sparse_irqs = MTREE_INIT_EXT(sparse_irqs,
@@ -181,15 +181,12 @@ static int irq_find_free_area(unsigned int from, unsigned int cnt)
 	return mas.index;
 }
 
-static unsigned int irq_find_at_or_after(unsigned int offset)
+struct irq_desc *irq_find_desc_at_or_after(unsigned int offset)
 {
 	unsigned long index = offset;
-	struct irq_desc *desc;
 
-	guard(rcu)();
-	desc = mt_find(&sparse_irqs, &index, nr_irqs);
-
-	return desc ? irq_desc_get_irq(desc) : nr_irqs;
+	lockdep_assert_in_rcu_read_lock();
+	return mt_find(&sparse_irqs, &index, total_nr_irqs);
 }
 
 static void irq_insert_desc(unsigned int irq, struct irq_desc *desc)
@@ -466,6 +463,17 @@ static void delayed_free_desc(struct rcu_head *rhp)
 	kobject_put(&desc->kobj);
 }
 
+void irq_desc_free_rcu(struct irq_desc *desc)
+{
+	/*
+	 * We free the descriptor, masks and stat fields via RCU. That
+	 * allows demultiplex interrupts to do rcu based management of
+	 * the child interrupts.
+	 * This also allows us to use rcu in kstat_irqs_usr().
+	 */
+	call_rcu(&desc->rcu, delayed_free_desc);
+}
+
 static void free_desc(unsigned int irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
@@ -484,14 +492,7 @@ static void free_desc(unsigned int irq)
 	 */
 	irq_sysfs_del(desc);
 	delete_irq_desc(irq);
-
-	/*
-	 * We free the descriptor, masks and stat fields via RCU. That
-	 * allows demultiplex interrupts to do rcu based management of
-	 * the child interrupts.
-	 * This also allows us to use rcu in kstat_irqs_usr().
-	 */
-	call_rcu(&desc->rcu, delayed_free_desc);
+	irq_desc_put_ref(desc);
 }
 
 static int alloc_descs(unsigned int start, unsigned int cnt, int node,
@@ -543,7 +544,8 @@ static bool irq_expand_nr_irqs(unsigned int nr)
 {
 	if (nr > MAX_SPARSE_IRQS)
 		return false;
-	nr_irqs = nr;
+	total_nr_irqs = nr;
+	irq_proc_calc_prec();
 	return true;
 }
 
@@ -557,21 +559,22 @@ int __init early_irq_init(void)
 	/* Let arch update nr_irqs and return the nr of preallocated irqs */
 	initcnt = arch_probe_nr_irqs();
 	printk(KERN_INFO "NR_IRQS: %d, nr_irqs: %d, preallocated irqs: %d\n",
-	       NR_IRQS, nr_irqs, initcnt);
+	       NR_IRQS, total_nr_irqs, initcnt);
 
-	if (WARN_ON(nr_irqs > MAX_SPARSE_IRQS))
-		nr_irqs = MAX_SPARSE_IRQS;
+	if (WARN_ON(total_nr_irqs > MAX_SPARSE_IRQS))
+		total_nr_irqs = MAX_SPARSE_IRQS;
 
 	if (WARN_ON(initcnt > MAX_SPARSE_IRQS))
 		initcnt = MAX_SPARSE_IRQS;
 
-	if (initcnt > nr_irqs)
-		nr_irqs = initcnt;
+	if (initcnt > total_nr_irqs)
+		total_nr_irqs = initcnt;
 
 	for (i = 0; i < initcnt; i++) {
 		desc = alloc_desc(i, node, 0, NULL, NULL);
 		irq_insert_desc(i, desc);
 	}
+	irq_proc_calc_prec();
 	return arch_early_irq_init();
 }
 
@@ -592,7 +595,7 @@ int __init early_irq_init(void)
 
 	init_irq_default_affinity();
 
-	printk(KERN_INFO "NR_IRQS: %d\n", NR_IRQS);
+	pr_info("NR_IRQS: %d\n", NR_IRQS);
 
 	count = ARRAY_SIZE(irq_desc);
 
@@ -602,6 +605,7 @@ int __init early_irq_init(void)
 			goto __free_desc_res;
 	}
 
+	irq_proc_calc_prec();
 	return arch_early_irq_init();
 
 __free_desc_res:
@@ -862,7 +866,7 @@ void irq_free_descs(unsigned int from, unsigned int cnt)
 {
 	int i;
 
-	if (from >= nr_irqs || (from + cnt) > nr_irqs)
+	if (from >= total_nr_irqs || (from + cnt) > total_nr_irqs)
 		return;
 
 	guard(mutex)(&sparse_irq_lock);
@@ -911,7 +915,7 @@ int __ref __irq_alloc_descs(int irq, unsigned int from, unsigned int cnt, int no
 	if (irq >=0 && start != irq)
 		return -EEXIST;
 
-	if (start + cnt > nr_irqs) {
+	if (start + cnt > total_nr_irqs) {
 		if (!irq_expand_nr_irqs(start + cnt))
 			return -ENOMEM;
 	}
@@ -923,11 +927,15 @@ EXPORT_SYMBOL_GPL(__irq_alloc_descs);
  * irq_get_next_irq - get next allocated irq number
  * @offset:	where to start the search
  *
- * Returns next irq number after offset or nr_irqs if none is found.
+ * Returns next irq number after offset or total_nr_irqs if none is found.
  */
 unsigned int irq_get_next_irq(unsigned int offset)
 {
-	return irq_find_at_or_after(offset);
+	struct irq_desc *desc;
+
+	guard(rcu)();
+	desc = irq_find_desc_at_or_after(offset);
+	return desc ? irq_desc_get_irq(desc) : total_nr_irqs;
 }
 
 struct irq_desc *__irq_get_desc_lock(unsigned int irq, unsigned long *flags, bool bus,
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index cc93abf009e8..f15c9f1223bb 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -20,6 +20,8 @@
 #include <linux/smp.h>
 #include <linux/fs.h>
 
+#include "proc.h"
+
 static LIST_HEAD(irq_domain_list);
 static DEFINE_MUTEX(irq_domain_mutex);
 
@@ -1532,6 +1534,7 @@ int irq_domain_set_hwirq_and_chip(struct irq_domain *domain, unsigned int virq,
 	irq_data->chip = (struct irq_chip *)(chip ? chip : &no_irq_chip);
 	irq_data->chip_data = chip_data;
 
+	irq_proc_update_chip(chip);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(irq_domain_set_hwirq_and_chip);
@@ -2081,7 +2084,7 @@ static void irq_domain_free_one_irq(struct irq_domain *domain, unsigned int virq
 #endif	/* CONFIG_IRQ_DOMAIN_HIERARCHY */
 
 #ifdef CONFIG_GENERIC_IRQ_DEBUGFS
-#include "internals.h"
+#include "debugfs.h"
 
 static struct dentry *domain_dir;
 
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 2e8072437826..7eb07e3bdb4c 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -1802,6 +1802,7 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 		__enable_irq(desc);
 	}
 
+	irq_proc_update_valid(desc);
 	raw_spin_unlock_irqrestore(&desc->lock, flags);
 	chip_bus_sync_unlock(desc);
 	mutex_unlock(&desc->request_mutex);
@@ -1906,6 +1907,7 @@ static struct irqaction *__free_irq(struct irq_desc *desc, void *dev_id)
 		desc->affinity_hint = NULL;
 #endif
 
+	irq_proc_update_valid(desc);
 	raw_spin_unlock_irqrestore(&desc->lock, flags);
 	/*
 	 * Drop bus_lock here so the changes which were done in the chip
@@ -2026,24 +2028,32 @@ const void *free_irq(unsigned int irq, void *dev_id)
 }
 EXPORT_SYMBOL(free_irq);
 
-/* This function must be called with desc->lock held */
 static const void *__cleanup_nmi(unsigned int irq, struct irq_desc *desc)
 {
+	struct irqaction *action = NULL;
 	const char *devname = NULL;
 
-	desc->istate &= ~IRQS_NMI;
+	scoped_guard(raw_spinlock_irqsave, &desc->lock) {
+		irq_nmi_teardown(desc);
 
-	if (!WARN_ON(desc->action == NULL)) {
-		irq_pm_remove_action(desc, desc->action);
-		devname = desc->action->name;
-		unregister_handler_proc(irq, desc->action);
+		desc->istate &= ~IRQS_NMI;
 
-		kfree(desc->action);
+		if (!WARN_ON(desc->action == NULL)) {
+			action = desc->action;
+			irq_pm_remove_action(desc, action);
+			devname = action->name;
+		}
 		desc->action = NULL;
+
+		irq_settings_clr_disable_unlazy(desc);
+		irq_shutdown_and_deactivate(desc);
 	}
 
-	irq_settings_clr_disable_unlazy(desc);
-	irq_shutdown_and_deactivate(desc);
+	irq_proc_update_valid(desc);
+
+	if (action)
+		unregister_handler_proc(irq, action);
+	kfree(action);
 
 	irq_release_resources(desc);
 
@@ -2067,8 +2077,6 @@ const void *free_nmi(unsigned int irq, void *dev_id)
 	if (WARN_ON(desc->depth == 0))
 		disable_nmi_nosync(irq);
 
-	guard(raw_spinlock_irqsave)(&desc->lock);
-	irq_nmi_teardown(desc);
 	return __cleanup_nmi(irq, desc);
 }
 
@@ -2318,13 +2326,14 @@ int request_nmi(unsigned int irq, irq_handler_t handler,
 		/* Setup NMI state */
 		desc->istate |= IRQS_NMI;
 		retval = irq_nmi_setup(desc);
-		if (retval) {
-			__cleanup_nmi(irq, desc);
-			return -EINVAL;
-		}
-		return 0;
 	}
 
+	if (retval) {
+		__cleanup_nmi(irq, desc);
+		return -EINVAL;
+	}
+	return 0;
+
 err_irq_setup:
 	irq_chip_pm_put(&desc->irq_data);
 err_out:
@@ -2428,8 +2437,10 @@ static struct irqaction *__free_percpu_irq(unsigned int irq, void __percpu *dev_
 		*action_ptr = action->next;
 
 		/* Demote from NMI if we killed the last action */
-		if (!desc->action)
+		if (!desc->action) {
 			desc->istate &= ~IRQS_NMI;
+			irq_proc_update_valid(desc);
+		}
 	}
 
 	unregister_handler_proc(irq, action);
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index b0999a4f1f68..1b835725f7b1 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -10,6 +10,7 @@
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
 #include <linux/interrupt.h>
+#include <linux/kernel.h>
 #include <linux/kernel_stat.h>
 #include <linux/mutex.h>
 #include <linux/string.h>
@@ -326,7 +327,7 @@ void register_handler_proc(unsigned int irq, struct irqaction *action)
 
 #undef MAX_NAMELEN
 
-#define MAX_NAMELEN 10
+#define MAX_NAMELEN 11
 
 void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 {
@@ -348,7 +349,7 @@ void register_irq_proc(unsigned int irq, struct irq_desc *desc)
 		return;
 
 	/* create /proc/irq/1234 */
-	sprintf(name, "%u", irq);
+	snprintf(name, MAX_NAMELEN, "%u", irq);
 	desc->dir = proc_mkdir(name, root_irq_dir);
 	if (!desc->dir)
 		return;
@@ -401,7 +402,7 @@ void unregister_irq_proc(unsigned int irq, struct irq_desc *desc)
 #endif
 	remove_proc_entry("spurious", desc->dir);
 
-	sprintf(name, "%u", irq);
+	snprintf(name, MAX_NAMELEN, "%u", irq);
 	remove_proc_entry(name, root_irq_dir);
 }
 
@@ -439,77 +440,159 @@ void init_irq_proc(void)
 		register_irq_proc(irq, desc);
 }
 
+void irq_proc_update_valid(struct irq_desc *desc)
+{
+	u32 set = _IRQ_PROC_VALID;
+
+	if (irq_settings_is_hidden(desc) || irq_desc_is_chained(desc) || !desc->action)
+		set = 0;
+
+	irq_settings_update_proc_valid(desc, set);
+}
+
 #ifdef CONFIG_GENERIC_IRQ_SHOW
 
+#define ARCH_PROC_IRQDESC ((void *)0x00001111)
+
 int __weak arch_show_interrupts(struct seq_file *p, int prec)
 {
 	return 0;
 }
 
+static DEFINE_RAW_SPINLOCK(irq_proc_constraints_lock);
+
+static struct irq_proc_constraints {
+	bool		print_header;
+	unsigned int	num_prec;
+	unsigned int	chip_width;
+} irq_proc_constraints __read_mostly = {
+	.num_prec	= 4,
+	.chip_width	= 8,
+};
+
 #ifndef ACTUAL_NR_IRQS
-# define ACTUAL_NR_IRQS irq_get_nr_irqs()
+# define ACTUAL_NR_IRQS total_nr_irqs
 #endif
 
-int show_interrupts(struct seq_file *p, void *v)
+void irq_proc_calc_prec(void)
 {
-	const unsigned int nr_irqs = irq_get_nr_irqs();
-	static int prec;
+	unsigned int prec, n;
 
-	int i = *(loff_t *) v, j;
+	for (prec = 4, n = 10000; prec < 10 && n <= total_nr_irqs; ++prec)
+		n *= 10;
+
+	guard(raw_spinlock_irqsave)(&irq_proc_constraints_lock);
+	if (prec > irq_proc_constraints.num_prec)
+		WRITE_ONCE(irq_proc_constraints.num_prec, prec);
+}
+
+void irq_proc_update_chip(const struct irq_chip *chip)
+{
+	unsigned int len = chip && chip->name ? strlen(chip->name) : 0;
+
+	if (!len || len <= READ_ONCE(irq_proc_constraints.chip_width))
+		return;
+
+	/* Can be invoked from interrupt disabled contexts */
+	guard(raw_spinlock_irqsave)(&irq_proc_constraints_lock);
+	if (len > irq_proc_constraints.chip_width)
+		WRITE_ONCE(irq_proc_constraints.chip_width, len);
+}
+
+/* Same as seq_put_decimal_ull_width(p, " ", cnt, 10) */
+#define ZSTR1 "          0"
+#define ZSTR1_LEN	(sizeof(ZSTR1) - 1)
+#define ZSTR16		ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 \
+			ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1 ZSTR1
+#define ZSTR256		ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 \
+			ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16 ZSTR16
+
+static inline void irq_proc_emit_zero_counts(struct seq_file *p, unsigned int zeros)
+{
+	if (!zeros)
+		return;
+
+	for (unsigned int n = min(zeros, 256); n; zeros -= n, n = min(zeros, 256))
+		seq_write(p, ZSTR256, n * ZSTR1_LEN);
+}
+
+static inline unsigned int irq_proc_emit_count(struct seq_file *p, unsigned int cnt,
+					       unsigned int zeros)
+{
+	if (!cnt)
+		return zeros + 1;
+
+	irq_proc_emit_zero_counts(p, zeros);
+	seq_put_decimal_ull_width(p, " ", cnt, 10);
+	return 0;
+}
+
+void irq_proc_emit_counts(struct seq_file *p, unsigned int __percpu *cnts)
+{
+	unsigned int cpu, zeros = 0;
+
+	for_each_online_cpu(cpu)
+		zeros = irq_proc_emit_count(p, per_cpu(*cnts, cpu), zeros);
+	irq_proc_emit_zero_counts(p, zeros);
+}
+
+static int irq_seq_show(struct seq_file *p, void *v)
+{
+	struct irq_proc_constraints *constr = p->private;
+	struct irq_desc *desc = v;
 	struct irqaction *action;
-	struct irq_desc *desc;
 
-	if (i > ACTUAL_NR_IRQS)
-		return 0;
+	/* Print header for the first interrupt? */
+	if (constr->print_header) {
+		unsigned int cpu;
 
-	if (i == ACTUAL_NR_IRQS)
-		return arch_show_interrupts(p, prec);
-
-	/* print header and calculate the width of the first column */
-	if (i == 0) {
-		for (prec = 3, j = 1000; prec < 10 && j <= nr_irqs; ++prec)
-			j *= 10;
-
-		seq_printf(p, "%*s", prec + 8, "");
-		for_each_online_cpu(j)
-			seq_printf(p, "CPU%-8d", j);
+		seq_printf(p, "%*s", constr->num_prec + 8, "");
+		for_each_online_cpu(cpu)
+			seq_printf(p, "CPU%-8d", cpu);
 		seq_putc(p, '\n');
+		constr->print_header = false;
 	}
 
-	guard(rcu)();
-	desc = irq_to_desc(i);
-	if (!desc || irq_settings_is_hidden(desc))
-		return 0;
+	if (desc == ARCH_PROC_IRQDESC)
+		return arch_show_interrupts(p, constr->num_prec);
 
-	if (!desc->action || irq_desc_is_chained(desc) || !desc->kstat_irqs)
-		return 0;
+	seq_put_decimal_ull_width(p, "", irq_desc_get_irq(desc), constr->num_prec);
+	seq_putc(p, ':');
 
-	seq_printf(p, "%*d:", prec, i);
-	for_each_online_cpu(j) {
-		unsigned int cnt = desc->kstat_irqs ? per_cpu(desc->kstat_irqs->cnt, j) : 0;
+	/*
+	 * Always output per CPU interrupts. Output device interrupts only when
+	 * desc::tot_count is not zero.
+	 */
+	if (irq_settings_is_per_cpu(desc) || irq_settings_is_per_cpu_devid(desc) ||
+	    data_race(desc->tot_count))
+		irq_proc_emit_counts(p, &desc->kstat_irqs->cnt);
+	else
+		irq_proc_emit_zero_counts(p, num_online_cpus());
 
-		seq_put_decimal_ull_width(p, " ", cnt, 10);
-	}
-	seq_putc(p, ' ');
+	/* Enforce a visual gap */
+	seq_write(p, "  ", 2);
 
 	guard(raw_spinlock_irq)(&desc->lock);
 	if (desc->irq_data.chip) {
 		if (desc->irq_data.chip->irq_print_chip)
 			desc->irq_data.chip->irq_print_chip(&desc->irq_data, p);
 		else if (desc->irq_data.chip->name)
-			seq_printf(p, "%8s", desc->irq_data.chip->name);
+			seq_printf(p, "%-*s", constr->chip_width, desc->irq_data.chip->name);
 		else
-			seq_printf(p, "%8s", "-");
+			seq_printf(p, "%-*s", constr->chip_width, "-");
 	} else {
-		seq_printf(p, "%8s", "None");
+		seq_printf(p, "%-*s", constr->chip_width, "None");
 	}
+
+	seq_putc(p, ' ');
 	if (desc->irq_data.domain)
-		seq_printf(p, " %*lu", prec, desc->irq_data.hwirq);
+		seq_put_decimal_ull_width(p, "", desc->irq_data.hwirq, constr->num_prec);
 	else
-		seq_printf(p, " %*s", prec, "");
-#ifdef CONFIG_GENERIC_IRQ_SHOW_LEVEL
-	seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
-#endif
+		seq_printf(p, " %*s", constr->num_prec, "");
+
+	if (IS_ENABLED(CONFIG_GENERIC_IRQ_SHOW_LEVEL))
+		seq_printf(p, " %-8s", irqd_is_level_type(&desc->irq_data) ? "Level" : "Edge");
+
 	if (desc->name)
 		seq_printf(p, "-%-8s", desc->name);
 
@@ -523,4 +606,73 @@ int show_interrupts(struct seq_file *p, void *v)
 	seq_putc(p, '\n');
 	return 0;
 }
+
+static void *irq_seq_next_desc(loff_t *pos)
+{
+	if (*pos > total_nr_irqs)
+		return NULL;
+
+	guard(rcu)();
+	for (;;) {
+		struct irq_desc *desc = irq_find_desc_at_or_after((unsigned int) *pos);
+
+		if (desc) {
+			*pos = irq_desc_get_irq(desc);
+			/*
+			 * If valid for output then try to acquire a reference
+			 * count on the descriptor so that it can't be freed
+			 * after dropping RCU read lock on return.
+			 */
+			if (irq_settings_proc_valid(desc) && irq_desc_get_ref(desc))
+				return desc;
+			(*pos)++;
+		} else {
+			*pos = total_nr_irqs;
+			return ARCH_PROC_IRQDESC;
+		}
+	}
+}
+
+static void *irq_seq_start(struct seq_file *f, loff_t *pos)
+{
+	if (!*pos) {
+		struct irq_proc_constraints *constr = f->private;
+
+		constr->num_prec = READ_ONCE(irq_proc_constraints.num_prec);
+		constr->chip_width = READ_ONCE(irq_proc_constraints.chip_width);
+		constr->print_header = true;
+	}
+	return irq_seq_next_desc(pos);
+}
+
+static void *irq_seq_next(struct seq_file *f, void *v, loff_t *pos)
+{
+	if (v && v != ARCH_PROC_IRQDESC)
+		irq_desc_put_ref(v);
+
+	(*pos)++;
+	return irq_seq_next_desc(pos);
+}
+
+static void irq_seq_stop(struct seq_file *f, void *v)
+{
+	if (v && v != ARCH_PROC_IRQDESC)
+		irq_desc_put_ref(v);
+}
+
+static const struct seq_operations irq_seq_ops = {
+	.start = irq_seq_start,
+	.next  = irq_seq_next,
+	.stop  = irq_seq_stop,
+	.show  = irq_seq_show,
+};
+
+static int __init irq_proc_init(void)
+{
+	proc_create_seq_private("interrupts", 0, NULL, &irq_seq_ops,
+				sizeof(irq_proc_constraints), NULL);
+	return 0;
+}
+fs_initcall(irq_proc_init);
+
 #endif
diff --git a/kernel/irq/proc.h b/kernel/irq/proc.h
new file mode 100644
index 000000000000..0631d57fbfb7
--- /dev/null
+++ b/kernel/irq/proc.h
@@ -0,0 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _KERNEL_IRQ_PROC_H
+#define _KERNEL_IRQ_PROC_H
+
+#if defined(CONFIG_PROC_FS) && defined(CONFIG_GENERIC_IRQ_SHOW)
+void irq_proc_calc_prec(void);
+void irq_proc_update_chip(const struct irq_chip *chip);
+#else
+static inline void irq_proc_calc_prec(void) { }
+static inline void irq_proc_update_chip(const struct irq_chip *chip) { }
+#endif
+
+#endif
diff --git a/kernel/irq/settings.h b/kernel/irq/settings.h
index 00b3bd127692..0a0c027a5d34 100644
--- a/kernel/irq/settings.h
+++ b/kernel/irq/settings.h
@@ -18,6 +18,7 @@ enum {
 	_IRQ_DISABLE_UNLAZY	= IRQ_DISABLE_UNLAZY,
 	_IRQ_HIDDEN		= IRQ_HIDDEN,
 	_IRQ_NO_DEBUG		= IRQ_NO_DEBUG,
+	_IRQ_PROC_VALID		= IRQ_RESERVED,
 	_IRQF_MODIFY_MASK	= IRQF_MODIFY_MASK,
 };
 
@@ -34,6 +35,7 @@ enum {
 #define IRQ_DISABLE_UNLAZY	GOT_YOU_MORON
 #define IRQ_HIDDEN		GOT_YOU_MORON
 #define IRQ_NO_DEBUG		GOT_YOU_MORON
+#define IRQ_RESERVED		GOT_YOU_MORON
 #undef IRQF_MODIFY_MASK
 #define IRQF_MODIFY_MASK	GOT_YOU_MORON
 
@@ -180,3 +182,14 @@ static inline bool irq_settings_no_debug(struct irq_desc *desc)
 {
 	return desc->status_use_accessors & _IRQ_NO_DEBUG;
 }
+
+static inline bool irq_settings_proc_valid(struct irq_desc *desc)
+{
+	return desc->status_use_accessors & _IRQ_PROC_VALID;
+}
+
+static inline void irq_settings_update_proc_valid(struct irq_desc *desc, u32 set)
+{
+	desc->status_use_accessors &= ~_IRQ_PROC_VALID;
+	desc->status_use_accessors |= (set & _IRQ_PROC_VALID);
+}
diff --git a/scripts/gdb/linux/interrupts.py b/scripts/gdb/linux/interrupts.py
index f4f715a8f0e3..a68ae91b4531 100644
--- a/scripts/gdb/linux/interrupts.py
+++ b/scripts/gdb/linux/interrupts.py
@@ -20,7 +20,7 @@ def irq_desc_is_chained(desc):
 def irqd_is_level(desc):
     return desc['irq_data']['common']['state_use_accessors'] & constants.LX_IRQD_LEVEL
 
-def show_irq_desc(prec, irq):
+def show_irq_desc(prec, chip_width, irq):
     text = ""
 
     desc = mapletree.mtree_load(gdb.parse_and_eval("&sparse_irqs"), irq)
@@ -48,7 +48,7 @@ def show_irq_desc(prec, irq):
             count = cpus.per_cpu(desc['kstat_irqs'], cpu)['cnt']
         else:
             count = 0
-        text += "%10u" % (count)
+        text += "%10u " % (count)
 
     name = "None"
     if desc['irq_data']['chip']:
@@ -58,7 +58,7 @@ def show_irq_desc(prec, irq):
         else:
             name = "-"
 
-    text += "  %8s" % (name)
+    text += "  %-*s" % (chip_width, name)
 
     if desc['irq_data']['domain']:
         text += "  %*lu" % (prec, desc['irq_data']['hwirq'])
@@ -97,64 +97,29 @@ def show_irq_err_count(prec):
         text += "%*s: %10u\n" % (prec, "ERR", cnt['counter'])
     return text
 
-def x86_show_irqstat(prec, pfx, field, desc):
-    irq_stat = gdb.parse_and_eval("&irq_stat")
+def x86_show_irqstat(prec, pfx, idx, desc):
+    irq_stat = gdb.parse_and_eval("&irq_stat.counts[%d]" %idx)
     text = "%*s: " % (prec, pfx)
     for cpu in cpus.each_online_cpu():
         stat = cpus.per_cpu(irq_stat, cpu)
-        text += "%10u " % (stat[field])
-    text += "  %s\n" % (desc)
-    return text
-
-def x86_show_mce(prec, var, pfx, desc):
-    pvar = gdb.parse_and_eval(var)
-    text = "%*s: " % (prec, pfx)
-    for cpu in cpus.each_online_cpu():
-        text += "%10u " % (cpus.per_cpu(pvar, cpu).dereference())
-    text += "  %s\n" % (desc)
+        text += "%10u " % (stat.dereference())
+    text += desc
     return text
 
 def x86_show_interupts(prec):
-    text = x86_show_irqstat(prec, "NMI", '__nmi_count', 'Non-maskable interrupts')
+    info_type = gdb.lookup_type('struct irq_stat_info')
+    info = gdb.parse_and_eval('irq_stat_info')
+    bitmap = gdb.parse_and_eval('irq_stat_count_show')
+    bitsperlong = 8 * int(bitmap.type.target().sizeof)
 
-    if constants.LX_CONFIG_X86_LOCAL_APIC:
-        text += x86_show_irqstat(prec, "LOC", 'apic_timer_irqs', "Local timer interrupts")
-        text += x86_show_irqstat(prec, "SPU", 'irq_spurious_count', "Spurious interrupts")
-        text += x86_show_irqstat(prec, "PMI", 'apic_perf_irqs', "Performance monitoring interrupts")
-        text += x86_show_irqstat(prec, "IWI", 'apic_irq_work_irqs', "IRQ work interrupts")
-        text += x86_show_irqstat(prec, "RTR", 'icr_read_retry_count', "APIC ICR read retries")
-        if utils.gdb_eval_or_none("x86_platform_ipi_callback") is not None:
-            text += x86_show_irqstat(prec, "PLT", 'x86_platform_ipis', "Platform interrupts")
-
-    if constants.LX_CONFIG_SMP:
-        text += x86_show_irqstat(prec, "RES", 'irq_resched_count', "Rescheduling interrupts")
-        text += x86_show_irqstat(prec, "CAL", 'irq_call_count', "Function call interrupts")
-        text += x86_show_irqstat(prec, "TLB", 'irq_tlb_count', "TLB shootdowns")
-
-    if constants.LX_CONFIG_X86_THERMAL_VECTOR:
-        text += x86_show_irqstat(prec, "TRM", 'irq_thermal_count', "Thermal events interrupts")
-
-    if constants.LX_CONFIG_X86_MCE_THRESHOLD:
-        text += x86_show_irqstat(prec, "THR", 'irq_threshold_count', "Threshold APIC interrupts")
-
-    if constants.LX_CONFIG_X86_MCE_AMD:
-        text += x86_show_irqstat(prec, "DFR", 'irq_deferred_error_count', "Deferred Error APIC interrupts")
-
-    if constants.LX_CONFIG_X86_MCE:
-        text += x86_show_mce(prec, "&mce_exception_count", "MCE", "Machine check exceptions")
-        text += x86_show_mce(prec, "&mce_poll_count", "MCP", "Machine check polls")
-
-    text += show_irq_err_count(prec)
-
-    if constants.LX_CONFIG_X86_IO_APIC:
-        cnt = utils.gdb_eval_or_none("irq_mis_count")
-        if cnt is not None:
-            text += "%*s: %10u\n" % (prec, "MIS", cnt['counter'])
-
-    if constants.LX_CONFIG_KVM:
-        text += x86_show_irqstat(prec, "PIN", 'kvm_posted_intr_ipis', 'Posted-interrupt notification event')
-        text += x86_show_irqstat(prec, "NPI", 'kvm_posted_intr_nested_ipis', 'Nested posted-interrupt event')
-        text += x86_show_irqstat(prec, "PIW", 'kvm_posted_intr_wakeup_ipis', 'Posted-interrupt wakeup event')
+    text = ""
+    for idx in range(int(info.type.sizeof / info_type.sizeof)):
+        show = bitmap[int(idx / bitsperlong)]
+        if not show & 1 << int(idx % bitsperlong):
+            continue
+        pfx = info[idx]['symbol'].string()
+        desc = info[idx]['text'].string()
+        text += x86_show_irqstat(prec, pfx, idx, desc)
 
     return text
 
@@ -166,23 +131,19 @@ def arm_common_show_interrupts(prec):
     if nr_ipi is None or ipi_desc is None or ipi_types is None:
         return text
 
-    if prec >= 4:
-        sep = " "
-    else:
-        sep = ""
-
     for ipi in range(nr_ipi):
-        text += "%*s%u:%s" % (prec - 1, "IPI", ipi, sep)
+        text += "%*s%u: " % (prec - 1, "IPI", ipi)
         desc = ipi_desc[ipi].cast(irq_desc_type.get_type().pointer())
         if desc == 0:
             continue
         for cpu in cpus.each_online_cpu():
-            text += "%10u" % (cpus.per_cpu(desc['kstat_irqs'], cpu)['cnt'])
-        text += "      %s" % (ipi_types[ipi].string())
+            text += "%10u " % (cpus.per_cpu(desc['kstat_irqs'], cpu)['cnt'])
+        text += "%s" % (ipi_types[ipi].string())
         text += "\n"
     return text
 
 def aarch64_show_interrupts(prec):
+    # Does not work for ARM64 as "ipi_desc" is not available there
     text = arm_common_show_interrupts(prec)
     text += "%*s: %10lu\n" % (prec, "ERR", gdb.parse_and_eval("irq_err_count"))
     return text
@@ -209,12 +170,19 @@ class LxInterruptList(gdb.Command):
         super(LxInterruptList, self).__init__("lx-interruptlist", gdb.COMMAND_DATA)
 
     def invoke(self, arg, from_tty):
-        nr_irqs = gdb.parse_and_eval("nr_irqs")
-        prec = 3
-        j = 1000
-        while prec < 10 and j <= nr_irqs:
-            prec += 1
-            j *= 10
+        nr_irqs = gdb.parse_and_eval("total_nr_irqs")
+        constr = utils.gdb_eval_or_none('irq_proc_constraints')
+
+        if constr:
+            prec = int(constr['num_prec'])
+            chip_width = int(constr['chip_width'])
+        else:
+            prec = 4
+            j = 10000
+            while prec < 10 and j <= nr_irqs:
+                prec += 1
+                j *= 10
+            chip_width = 8
 
         gdb.write("%*s" % (prec + 8, ""))
         for cpu in cpus.each_online_cpu():
@@ -225,7 +193,7 @@ class LxInterruptList(gdb.Command):
             raise gdb.GdbError("Unable to find the sparse IRQ tree, is CONFIG_SPARSE_IRQ enabled?")
 
         for irq in range(nr_irqs):
-            gdb.write(show_irq_desc(prec, irq))
+            gdb.write(show_irq_desc(prec, chip_width, irq))
         gdb.write(arch_show_interrupts(prec))