genirq/matrix: Add tracepoints

Add tracepoints for the irq bitmap matrix allocator.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Juergen Gross <jgross@suse.com>
Tested-by: Yu Chen <yu.c.chen@intel.com>
Acked-by: Juergen Gross <jgross@suse.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Alok Kataria <akataria@vmware.com>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Rui Zhang <rui.zhang@intel.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Len Brown <lenb@kernel.org>
Link: https://lkml.kernel.org/r/20170913213153.279468022@linutronix.de

1 files changed, 15 insertions, 0 deletions

diff --git a/kernel/irq/matrix.c b/kernel/irq/matrix.c
index 7b2b4fbde1e2..a3cbbc8191c5 100644
--- a/kernel/irq/matrix.c
+++ b/kernel/irq/matrix.c
@@ -36,6 +36,9 @@ struct irq_matrix {
         unsigned long           system_map[IRQ_MATRIX_SIZE];
 };
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/irq_matrix.h>
+
 /**
  * irq_alloc_matrix - Allocate a irq_matrix structure and initialize it
  * @matrix_bits:        Number of matrix bits must be <= IRQ_MATRIX_BITS
@@ -84,6 +87,7 @@ void irq_matrix_online(struct irq_matrix *m)
         m->global_available += cm->available;
         cm->online = true;
         m->online_maps++;
+        trace_irq_matrix_online(m);
 }
 
 /**
@@ -98,6 +102,7 @@ void irq_matrix_offline(struct irq_matrix *m)
         m->global_available -= cm->available;
         cm->online = false;
         m->online_maps--;
+        trace_irq_matrix_offline(m);
 }
 
 static unsigned int matrix_alloc_area(struct irq_matrix *m, struct cpumap *cm,
@@ -145,6 +150,8 @@ void irq_matrix_assign_system(struct irq_matrix *m, unsigned int bit,
         }
         if (bit >= m->alloc_start && bit < m->alloc_end)
                 m->systembits_inalloc++;
+
+        trace_irq_matrix_assign_system(bit, m);
 }
 
 /**
@@ -172,6 +179,7 @@ int irq_matrix_reserve_managed(struct irq_matrix *m, const struct cpumask *msk)
                         cm->available--;
                         m->global_available--;
                 }
+                trace_irq_matrix_reserve_managed(bit, cpu, m, cm);
         }
         return 0;
 cleanup:
@@ -221,6 +229,7 @@ void irq_matrix_remove_managed(struct irq_matrix *m, const struct cpumask *msk)
                         cm->available++;
                         m->global_available++;
                 }
+                trace_irq_matrix_remove_managed(bit, cpu, m, cm);
         }
 }
 
@@ -242,6 +251,7 @@ int irq_matrix_alloc_managed(struct irq_matrix *m, unsigned int cpu)
         set_bit(bit, cm->alloc_map);
         cm->allocated++;
         m->total_allocated++;
+        trace_irq_matrix_alloc_managed(bit, cpu, m, cm);
         return bit;
 }
 
@@ -264,6 +274,7 @@ void irq_matrix_assign(struct irq_matrix *m, unsigned int bit)
         m->total_allocated++;
         cm->available--;
         m->global_available--;
+        trace_irq_matrix_assign(bit, smp_processor_id(), m, cm);
 }
 
 /**
@@ -282,6 +293,7 @@ void irq_matrix_reserve(struct irq_matrix *m)
                 pr_warn("Interrupt reservation exceeds available resources\n");
 
         m->global_reserved++;
+        trace_irq_matrix_reserve(m);
 }
 
 /**
@@ -296,6 +308,7 @@ void irq_matrix_reserve(struct irq_matrix *m)
 void irq_matrix_remove_reserved(struct irq_matrix *m)
 {
         m->global_reserved--;
+        trace_irq_matrix_remove_reserved(m);
 }
 
 /**
@@ -326,6 +339,7 @@ int irq_matrix_alloc(struct irq_matrix *m, const struct cpumask *msk,
                         if (reserved)
                                 m->global_reserved--;
                         *mapped_cpu = cpu;
+                        trace_irq_matrix_alloc(bit, cpu, m, cm);
                         return bit;
                 }
         }
@@ -357,6 +371,7 @@ void irq_matrix_free(struct irq_matrix *m, unsigned int cpu,
                         m->global_available++;
                 }
         }
+        trace_irq_matrix_free(bit, cpu, m, cm);
 }
 
 /**