check amount of available KVM memory slots after all
devices were initialized and exit with error if
there isn't enough free memory slots for DIMMs.
Signed-off-by: Igor Mammedov <imamm...@redhat.com>
---
hw/i386/pc.c | 32 ++++++++++++++++++++++++++++++++
1 file changed, 32 insertions(+)
diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index f6dfd9b..41d91fb 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1125,6 +1125,36 @@ PcGuestInfo *pc_guest_info_init(ram_addr_t
below_4g_mem_size,
return guest_info;
}
+static int pc_dimm_count(Object *obj, void *opaque)
+{
+ int *count = opaque;
+
+ if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
+ (*count)++;
+ }
+
+ object_child_foreach(obj, pc_dimm_count, opaque);
+ return 0;
+}
+
+static void pc_kvm_slot_check(Notifier *notifier, void *data)
+{
+ MachineState *ms = MACHINE(qdev_get_machine());
+ int free_slots = kvm_free_slot_count(ms);
+ int used_ram_slots = 0;
+
+ pc_dimm_count(OBJECT(ms), &used_ram_slots);
+ if ((ms->ram_slots - used_ram_slots) > free_slots) {
+ error_report("KVM doesn't support more than %d memory slots",
+ kvm_free_slot_count(ms));
+ exit(EXIT_FAILURE);
+ }
+}
+
+static Notifier kvm_slot_check_on_machine_done = {
+ .notify = pc_kvm_slot_check
+ };
+
/* setup pci memory address space mapping into system address space */
void pc_pci_as_mapping_init(Object *owner, MemoryRegion *system_memory,
MemoryRegion *pci_address_space)
@@ -1269,6 +1299,8 @@ FWCfgState *pc_memory_init(MachineState *machine,
"hotplug-memory", hotplug_mem_size);
memory_region_add_subregion(system_memory, pcms->hotplug_memory_base,
&pcms->hotplug_memory);
+
+ qemu_add_machine_init_done_notifier(&kvm_slot_check_on_machine_done);
}
/* Initialize PC system firmware */
--
1.8.3.1
