[Qemu-devel] [PULL 33/45] memory-device: trace when pre_plugging/plugging/unplugging

[Eduardo Habkost <ehabkost@redhat.com>]

From: David Hildenbrand <david@redhat.com>

Let's trace the address and the id of a memory device when
pre_plugging/plugging/unplugging succeeded.

Trace it when pre_plugging as well as when plugging, so we really know
when a specific address is actually used.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20181005092024.14344-17-david@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
---
 hw/mem/memory-device.c | 8 ++++++++
 hw/mem/pc-dimm.c       | 8 --------
 hw/mem/trace-events    | 5 ++++-
 3 files changed, 12 insertions(+), 9 deletions(-)

diff --git a/hw/mem/memory-device.c b/hw/mem/memory-device.c
index 30585d6148..7de1ccd497 100644
--- a/hw/mem/memory-device.c
+++ b/hw/mem/memory-device.c
@@ -17,6 +17,7 @@
 #include "qemu/range.h"
 #include "hw/virtio/vhost.h"
 #include "sysemu/kvm.h"
+#include "trace.h"
 
 static gint memory_device_addr_sort(gconstpointer a, gconstpointer b)
 {
@@ -269,6 +270,10 @@ void memory_device_pre_plug(MemoryDeviceState *md, MachineState *ms,
         goto out;
     }
     mdc->set_addr(md, addr, &local_err);
+    if (!local_err) {
+        trace_memory_device_pre_plug(DEVICE(md)->id ? DEVICE(md)->id : "",
+                                     addr);
+    }
 out:
     error_propagate(errp, local_err);
 }
@@ -288,6 +293,7 @@ void memory_device_plug(MemoryDeviceState *md, MachineState *ms)
 
     memory_region_add_subregion(&ms->device_memory->mr,
                                 addr - ms->device_memory->base, mr);
+    trace_memory_device_plug(DEVICE(md)->id ? DEVICE(md)->id : "", addr);
 }
 
 void memory_device_unplug(MemoryDeviceState *md, MachineState *ms)
@@ -303,6 +309,8 @@ void memory_device_unplug(MemoryDeviceState *md, MachineState *ms)
     g_assert(ms->device_memory);
 
     memory_region_del_subregion(&ms->device_memory->mr, mr);
+    trace_memory_device_unplug(DEVICE(md)->id ? DEVICE(md)->id : "",
+                               mdc->get_addr(md));
 }
 
 uint64_t memory_device_get_region_size(const MemoryDeviceState *md,
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 6c854139a7..0c9b9e8292 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -33,7 +33,6 @@ void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine,
                       const uint64_t *legacy_align, Error **errp)
 {
     Error *local_err = NULL;
-    uint64_t addr;
     int slot;
 
     slot = object_property_get_int(OBJECT(dimm), PC_DIMM_SLOT_PROP,
@@ -49,13 +48,6 @@ void pc_dimm_pre_plug(PCDIMMDevice *dimm, MachineState *machine,
 
     memory_device_pre_plug(MEMORY_DEVICE(dimm), machine, legacy_align,
                            &local_err);
-    if (local_err) {
-        goto out;
-    }
-
-    addr = object_property_get_uint(OBJECT(dimm), PC_DIMM_ADDR_PROP,
-                                    &error_abort);
-    trace_mhp_pc_dimm_assigned_address(addr);
 out:
     error_propagate(errp, local_err);
 }
diff --git a/hw/mem/trace-events b/hw/mem/trace-events
index e150dcc497..0f2f278ff2 100644
--- a/hw/mem/trace-events
+++ b/hw/mem/trace-events
@@ -2,4 +2,7 @@
 
 # hw/mem/pc-dimm.c
 mhp_pc_dimm_assigned_slot(int slot) "%d"
-mhp_pc_dimm_assigned_address(uint64_t addr) "0x%"PRIx64
+# hw/mem/memory-device.c
+memory_device_pre_plug(const char *id, uint64_t addr) "id=%s addr=0x%"PRIx64
+memory_device_plug(const char *id, uint64_t addr) "id=%s addr=0x%"PRIx64
+memory_device_unplug(const char *id, uint64_t addr) "id=%s addr=0x%"PRIx64
-- 
2.18.0.rc1.1.g3f1ff2140