[PATCH v4 4/7] numa: Introduce and use ram_block_notify_remap()

[“William Roche <william.roche@xxxxxxxxxx>]

From: David Hildenbrand <david@xxxxxxxxxx>

Notify registered listeners about the remap at the end of
qemu_ram_remap() so e.g., a memory backend can re-apply its
settings correctly.

Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
Signed-off-by: William Roche <william.roche@xxxxxxxxxx>
---
 hw/core/numa.c         | 11 +++++++++++
 include/exec/ramlist.h |  3 +++
 system/physmem.c       |  1 +
 3 files changed, 15 insertions(+)

diff --git a/hw/core/numa.c b/hw/core/numa.c
index 1b5f44baea..4ca67db483 100644
--- a/hw/core/numa.c
+++ b/hw/core/numa.c
@@ -895,3 +895,14 @@ void ram_block_notify_resize(void *host, size_t old_size, size_t new_size)
         }
     }
 }
+
+void ram_block_notify_remap(void *host, size_t offset, size_t size)
+{
+    RAMBlockNotifier *notifier;
+
+    QLIST_FOREACH(notifier, &ram_list.ramblock_notifiers, next) {
+        if (notifier->ram_block_remapped) {
+            notifier->ram_block_remapped(notifier, host, offset, size);
+        }
+    }
+}
diff --git a/include/exec/ramlist.h b/include/exec/ramlist.h
index d9cfe530be..c1dc785a57 100644
--- a/include/exec/ramlist.h
+++ b/include/exec/ramlist.h
@@ -72,6 +72,8 @@ struct RAMBlockNotifier {
                               size_t max_size);
     void (*ram_block_resized)(RAMBlockNotifier *n, void *host, size_t old_size,
                               size_t new_size);
+    void (*ram_block_remapped)(RAMBlockNotifier *n, void *host, size_t offset,
+                               size_t size);
     QLIST_ENTRY(RAMBlockNotifier) next;
 };
 
@@ -80,6 +82,7 @@ void ram_block_notifier_remove(RAMBlockNotifier *n);
 void ram_block_notify_add(void *host, size_t size, size_t max_size);
 void ram_block_notify_remove(void *host, size_t size, size_t max_size);
 void ram_block_notify_resize(void *host, size_t old_size, size_t new_size);
+void ram_block_notify_remap(void *host, size_t offset, size_t size);
 
 GString *ram_block_format(void);
 
diff --git a/system/physmem.c b/system/physmem.c
index b228a692f8..9fc74a5699 100644
--- a/system/physmem.c
+++ b/system/physmem.c
@@ -2244,6 +2244,7 @@ void qemu_ram_remap(ram_addr_t addr)
                 }
                 memory_try_enable_merging(vaddr, page_size);
                 qemu_ram_setup_dump(vaddr, page_size);
+                ram_block_notify_remap(block->host, offset, page_size);
             }
 
             break;
-- 
2.43.5