From: David Hildenbrand <david@redhat.com>
Let's register a RAM block notifier and react on remap notifications.
Simply re-apply the settings. Warn only when something goes wrong.
Note: qemu_ram_remap() will not remap when RAM_PREALLOC is set. Could be
that hostmem is still missing to update that flag ...
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: William Roche <william.roche@oracle.com>
---
backends/hostmem.c | 29 +++++++++++++++++++++++++++++
include/sysemu/hostmem.h | 1 +
2 files changed, 30 insertions(+)
diff --git a/backends/hostmem.c b/backends/hostmem.c
index bf85d716e5..fbd8708664 100644
--- a/backends/hostmem.c
+++ b/backends/hostmem.c
@@ -361,11 +361,32 @@ static void
host_memory_backend_set_prealloc_threads(Object *obj, Visitor *v,
backend->prealloc_threads = value;
}
+static void host_memory_backend_ram_remapped(RAMBlockNotifier *n,
void *host,
+ size_t offset, size_t size)
+{
+ HostMemoryBackend *backend = container_of(n, HostMemoryBackend,
+ ram_notifier);
+ Error *err = NULL;
+
+ if (!host_memory_backend_mr_inited(backend) ||
+ memory_region_get_ram_ptr(&backend->mr) != host) {
+ return;
+ }
+
+ host_memory_backend_apply_settings(backend, host + offset, size,
&err);
+ if (err) {
+ warn_report_err(err);