@@ -1155,6 +1155,7 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
MemoryRegion *ram, *option_rom_mr;
MemoryRegion *ram_below_4g, *ram_above_4g;
FWCfgState *fw_cfg;
+ ram_addr_t ram_size = below_4g_mem_size + above_4g_mem_size;
uint64_t ram_slot;
MachineState *machine = MACHINE(qdev_get_machine());
PCMachineState *pcms = PC_MACHINE(machine);
@@ -1166,8 +1167,7 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
* with older qemus that used qemu_ram_alloc().
*/
ram = g_malloc(sizeof(*ram));
- memory_region_init_ram(ram, NULL, "pc.ram",
- below_4g_mem_size + above_4g_mem_size);
+ memory_region_init_ram(ram, NULL, "pc.ram", ram_size);
vmstate_register_ram_global(ram);
*ram_memory = ram;
ram_below_4g = g_malloc(sizeof(*ram_below_4g));
@@ -1184,6 +1184,20 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
e820_add_entry(0x100000000ULL, above_4g_mem_size, E820_RAM);
}
+ /* initialize memory hotplug address space */
+ if (ram_size < machine->init_args.maxram_size) {
+ ram_addr_t hotplug_mem_size =
+ machine->init_args.maxram_size - ram_size;
+
+ pcms->hotplug_memory_base =
+ ROUND_UP(0x100000000ULL + above_4g_mem_size, 1ULL << 30);
+
+ memory_region_init(&pcms->hotplug_memory, OBJECT(pcms),
+ "hotplug-memory", hotplug_mem_size);
+ memory_region_add_subregion(system_memory, pcms->hotplug_memory_base,
+ &pcms->hotplug_memory);
+ }
+
for (ram_slot = 0; ram_slot < machine->init_args.ram_slots; ram_slot++) {
char *dimm_name;
@@ -25,6 +25,9 @@ struct PCMachineState {
/* <public> */
DimmDevice *memory_slots[PC_MAX_DIMM_SLOTS];
+
+ ram_addr_t hotplug_memory_base;
+ MemoryRegion hotplug_memory;
};
typedef struct PCMachineState PCMachineState;
Signed-off-by: Igor Mammedov <imammedo@redhat.com> --- hw/i386/pc.c | 18 ++++++++++++++++-- include/hw/i386/pc.h | 3 +++ 2 files changed, 19 insertions(+), 2 deletions(-)