@@ -25,6 +25,7 @@
#include "sysemu/numa.h"
#include "sysemu/kvm.h"
#include "trace.h"
+#include "hw/virtio/vhost.h"
typedef struct pc_dimms_capacity {
uint64_t size;
@@ -96,6 +97,12 @@ void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
goto out;
}
+ if (!vhost_has_free_slot()) {
+ error_setg(&local_err, "a used vhost backend has no free"
+ " memory slots left");
+ goto out;
+ }
+
memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr);
vmstate_register_ram(mr, dev);
numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node);
it allows safely cancel memory hotplug if vhost backend doesn't support necessary amount of memory slots and prevents QEMU crashing in vhost due to hitting vhost limit on amount of supported memory ranges. Signed-off-by: Igor Mammedov <imammedo@redhat.com> --- hw/mem/pc-dimm.c | 7 +++++++ 1 file changed, 7 insertions(+)