[Qemu-devel] [PATCH v2 12/20] memory-device: trace when pre_assigning/assigning/unassigning addresses

[David Hildenbrand <david@redhat.com>]

Let's trace the address when pre_pluggin/plugging/unplugging a memory device.

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

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 hw/mem/memory-device.c | 6 ++++++
 hw/mem/pc-dimm.c       | 8 --------
 hw/mem/trace-events    | 5 ++++-
 3 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/hw/mem/memory-device.c b/hw/mem/memory-device.c
index 5f62eb6a94..a31ba73ea7 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)
 {
@@ -274,6 +275,9 @@ 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_assign_address(addr);
+    }
 out:
     error_propagate(errp, local_err);
 }
@@ -290,6 +294,7 @@ 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_assign_address(addr);
 }
 
 void memory_device_unplug(MemoryDeviceState *md, MachineState *ms)
@@ -302,6 +307,7 @@ 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_unassign_address(mdc->get_addr(md));
 }
 
 static const TypeInfo memory_device_info = {
diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index 634335f984..732b3b8a1d 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -33,7 +33,6 @@ void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine,
                       const uint64_t *legacy_align, Error **errp)
 {
     Error *local_err = NULL;
-    uint64_t addr;
     int slot;
 
     slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
@@ -48,13 +47,6 @@ void pc_dimm_pre_plug(DeviceState *dev, MachineState *machine,
 
     memory_device_pre_plug(MEMORY_DEVICE(dev), machine, legacy_align,
                            &local_err);
-    if (local_err) {
-        goto out;
-    }
-
-    addr = object_property_get_uint(OBJECT(dev), 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..b40482077e 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_assign_address(uint64_t addr) "0x%"PRIx64
+memory_device_assign_address(uint64_t addr) "0x%"PRIx64
+memory_device_unassign_address(uint64_t addr) "0x%"PRIx64
-- 
2.17.1