memory: Name all the memory listeners

Provide a name field for all the memory listeners.  It can be used to identify
which memory listener is which.

Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210817013553.30584-2-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

accel/hvf/hvf-accel-ops.c

@@ -295,6 +295,7 @@ static void hvf_region_del(MemoryListener *listener,
 }
 
 static MemoryListener hvf_memory_listener = {
+    .name = "hvf",
     .priority = 10,
     .region_add = hvf_region_add,
     .region_del = hvf_region_del,

accel/kvm/kvm-all.c

@@ -1129,6 +1129,7 @@ static void kvm_coalesce_pio_del(MemoryListener *listener,
 }
 
 static MemoryListener kvm_coalesced_pio_listener = {
+    .name = "kvm-coalesced-pio",
     .coalesced_io_add = kvm_coalesce_pio_add,
     .coalesced_io_del = kvm_coalesce_pio_del,
 };
@@ -1633,7 +1634,7 @@ static void kvm_io_ioeventfd_del(MemoryListener *listener,
 }
 
 void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
-                                  AddressSpace *as, int as_id)
+                                  AddressSpace *as, int as_id, const char *name)
 {
     int i;
 
@@ -1649,6 +1650,7 @@ void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
     kml->listener.log_start = kvm_log_start;
     kml->listener.log_stop = kvm_log_stop;
     kml->listener.priority = 10;
+    kml->listener.name = name;
 
     if (s->kvm_dirty_ring_size) {
         kml->listener.log_sync_global = kvm_log_sync_global;
@@ -1669,6 +1671,7 @@ void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
 }
 
 static MemoryListener kvm_io_listener = {
+    .name = "kvm-io",
     .eventfd_add = kvm_io_ioeventfd_add,
     .eventfd_del = kvm_io_ioeventfd_del,
     .priority = 10,
@@ -2579,7 +2582,7 @@ static int kvm_init(MachineState *ms)
     s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region;
 
     kvm_memory_listener_register(s, &s->memory_listener,
-                                 &address_space_memory, 0);
+                                 &address_space_memory, 0, "kvm-memory");
     if (kvm_eventfds_allowed) {
         memory_listener_register(&kvm_io_listener,
                                  &address_space_io);

hw/i386/xen/xen-hvm.c

@@ -721,6 +721,7 @@ static void xen_log_global_stop(MemoryListener *listener)
 }
 
 static MemoryListener xen_memory_listener = {
+    .name = "xen-memory",
     .region_add = xen_region_add,
     .region_del = xen_region_del,
     .log_start = xen_log_start,
@@ -732,6 +733,7 @@ static MemoryListener xen_memory_listener = {
 };
 
 static MemoryListener xen_io_listener = {
+    .name = "xen-io",
     .region_add = xen_io_add,
     .region_del = xen_io_del,
     .priority = 10,

hw/intc/openpic_kvm.c

@@ -234,6 +234,7 @@ static void kvm_openpic_realize(DeviceState *dev, Error **errp)
 
     opp->mem_listener.region_add = kvm_openpic_region_add;
     opp->mem_listener.region_del = kvm_openpic_region_del;
+    opp->mem_listener.name = "openpic-kvm";
     memory_listener_register(&opp->mem_listener, &address_space_memory);
 
     /* indicate pic capabilities */

hw/remote/proxy-memory-listener.c

@@ -219,6 +219,7 @@ void proxy_memory_listener_configure(ProxyMemoryListener *proxy_listener,
     proxy_listener->listener.region_add = proxy_memory_listener_region_addnop;
     proxy_listener->listener.region_nop = proxy_memory_listener_region_addnop;
     proxy_listener->listener.priority = 10;
+    proxy_listener->listener.name = "proxy";
 
     memory_listener_register(&proxy_listener->listener,
                              &address_space_memory);

hw/vfio/common.c

@@ -1435,6 +1435,7 @@ static void vfio_listener_log_sync(MemoryListener *listener,
 }
 
 static const MemoryListener vfio_memory_listener = {
+    .name = "vfio",
     .region_add = vfio_listener_region_add,
     .region_del = vfio_listener_region_del,
     .log_global_start = vfio_listener_log_global_start,

hw/vfio/spapr.c

@@ -136,6 +136,7 @@ static void vfio_prereg_listener_region_del(MemoryListener *listener,
 }
 
 const MemoryListener vfio_prereg_listener = {
+    .name = "vfio-pre-reg",
     .region_add = vfio_prereg_listener_region_add,
     .region_del = vfio_prereg_listener_region_del,
 };

hw/virtio/vhost-vdpa.c

@@ -246,6 +246,7 @@ static void vhost_vdpa_listener_region_del(MemoryListener *listener,
  * depends on the addnop().
  */
 static const MemoryListener vhost_vdpa_memory_listener = {
+    .name = "vhost-vdpa",
     .commit = vhost_vdpa_listener_commit,
     .region_add = vhost_vdpa_listener_region_add,
     .region_del = vhost_vdpa_listener_region_del,

hw/virtio/vhost.c

@@ -1366,6 +1366,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
     hdev->features = features;
 
     hdev->memory_listener = (MemoryListener) {
+        .name = "vhost",
         .begin = vhost_begin,
         .commit = vhost_commit,
         .region_add = vhost_region_addnop,
@@ -1381,6 +1382,7 @@ int vhost_dev_init(struct vhost_dev *hdev, void *opaque,
     };
 
     hdev->iommu_listener = (MemoryListener) {
+        .name = "vhost-iommu",
         .region_add = vhost_iommu_region_add,
         .region_del = vhost_iommu_region_del,
     };

hw/virtio/virtio.c

@@ -3670,6 +3670,7 @@ static void virtio_device_realize(DeviceState *dev, Error **errp)
     }
 
     vdev->listener.commit = virtio_memory_listener_commit;
+    vdev->listener.name = "virtio";
     memory_listener_register(&vdev->listener, vdev->dma_as);
 }
 

hw/xen/xen_pt.c

@@ -689,12 +689,14 @@ static void xen_pt_io_region_del(MemoryListener *l, MemoryRegionSection *sec)
 }
 
 static const MemoryListener xen_pt_memory_listener = {
+    .name = "xen-pt-mem",
     .region_add = xen_pt_region_add,
     .region_del = xen_pt_region_del,
     .priority = 10,
 };
 
 static const MemoryListener xen_pt_io_listener = {
+    .name = "xen-pt-io",
     .region_add = xen_pt_io_region_add,
     .region_del = xen_pt_io_region_del,
     .priority = 10,

include/exec/memory.h

@@ -982,6 +982,14 @@ struct MemoryListener {
      */
     unsigned priority;
 
+    /**
+     * @name:
+     *
+     * Name of the listener.  It can be used in contexts where we'd like to
+     * identify one memory listener with the rest.
+     */
+    const char *name;
+
     /* private: */
     AddressSpace *address_space;
     QTAILQ_ENTRY(MemoryListener) link;

include/sysemu/kvm_int.h

@@ -37,7 +37,7 @@ typedef struct KVMMemoryListener {
 } KVMMemoryListener;
 
 void kvm_memory_listener_register(KVMState *s, KVMMemoryListener *kml,
-                                  AddressSpace *as, int as_id);
+                                  AddressSpace *as, int as_id, const char *name);
 
 void kvm_set_max_memslot_size(hwaddr max_slot_size);
 

softmmu/physmem.c

@@ -756,6 +756,7 @@ void cpu_address_space_init(CPUState *cpu, int asidx,
     if (tcg_enabled()) {
         newas->tcg_as_listener.log_global_after_sync = tcg_log_global_after_sync;
         newas->tcg_as_listener.commit = tcg_commit;
+        newas->tcg_as_listener.name = "tcg";
         memory_listener_register(&newas->tcg_as_listener, as);
     }
 }

target/arm/kvm.c

@@ -335,6 +335,7 @@ static void kvm_arm_devlistener_del(MemoryListener *listener,
 }
 
 static MemoryListener devlistener = {
+    .name = "kvm-arm",
     .region_add = kvm_arm_devlistener_add,
     .region_del = kvm_arm_devlistener_del,
 };

target/i386/hax/hax-mem.c

@@ -285,6 +285,7 @@ static void hax_log_sync(MemoryListener *listener,
 }
 
 static MemoryListener hax_memory_listener = {
+    .name = "hax",
     .begin = hax_transaction_begin,
     .commit = hax_transaction_commit,
     .region_add = hax_region_add,

target/i386/kvm/kvm.c

@@ -2248,7 +2248,7 @@ static void register_smram_listener(Notifier *n, void *unused)
 
     address_space_init(&smram_address_space, &smram_as_root, "KVM-SMRAM");
     kvm_memory_listener_register(kvm_state, &smram_listener,
-                                 &smram_address_space, 1);
+                                 &smram_address_space, 1, "kvm-smram");
 }
 
 int kvm_arch_init(MachineState *ms, KVMState *s)

target/i386/nvmm/nvmm-all.c

@@ -1123,6 +1123,7 @@ nvmm_log_sync(MemoryListener *listener, MemoryRegionSection *section)
 }
 
 static MemoryListener nvmm_memory_listener = {
+    .name = "nvmm",
     .begin = nvmm_transaction_begin,
     .commit = nvmm_transaction_commit,
     .region_add = nvmm_region_add,

target/i386/whpx/whpx-all.c

@@ -1598,6 +1598,7 @@ static void whpx_log_sync(MemoryListener *listener,
 }
 
 static MemoryListener whpx_memory_listener = {
+    .name = "whpx",
     .begin = whpx_transaction_begin,
     .commit = whpx_transaction_commit,
     .region_add = whpx_region_add,