pseries: Add trace event for PCI irqs

This adds a trace event in the pseries PCI specific set_irq() function to
assist in debugging.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
[agraf: add trace.h include]
Signed-off-by: Alexander Graf <agraf@suse.de>

hw/spapr_pci.c

@@ -29,6 +29,7 @@
 #include "hw/spapr_pci.h"
 #include "exec-memory.h"
 #include <libfdt.h>
+#include "trace.h"
 
 #include "hw/pci_internals.h"
 
@@ -234,6 +235,7 @@ static void pci_spapr_set_irq(void *opaque, int irq_num, int level)
      */
     sPAPRPHBState *phb = opaque;
 
+    trace_spapr_pci_lsi_set(phb->busname, irq_num, phb->lsi_table[irq_num].irq);
     qemu_set_irq(spapr_phb_lsi_qirq(phb, irq_num), level);
 }
 

trace-events

@@ -970,3 +970,6 @@ qxl_render_blit_guest_primary_initialized(void) ""
 qxl_render_blit(int32_t stride, int32_t left, int32_t right, int32_t top, int32_t bottom) "stride=%d [%d, %d, %d, %d]"
 qxl_render_guest_primary_resized(int32_t width, int32_t height, int32_t stride, int32_t bytes_pp, int32_t bits_pp) "%dx%d, stride %d, bpp %d, depth %d"
 qxl_render_update_area_done(void *cookie) "%p"
+
+# hw/spapr_pci.c
+spapr_pci_lsi_set(const char *busname, int pin, uint32_t irq) "%s PIN%d IRQ %u"