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pc: initialize memory hotplug address space 

initialize and map hotplug memory address space container
into guest's RAM address space.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Acked-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Igor Mammedov 2014-06-02 15:25:08 +02:00 committed by Michael S. Tsirkin
parent 7bb5d6ade6
commit 619d11e463
2 changed files with 34 additions and 2 deletions
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26
hw/i386/pc.c
View File

@ -1197,6 +1197,9 @@ 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;
MachineState *machine = MACHINE(qdev_get_machine());
PCMachineState *pcms = PC_MACHINE(machine);
linux_boot = (kernel_filename != NULL);
@ -1205,8 +1208,7 @@ 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));
@ -1223,6 +1225,26 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory,
e820_add_entry(0x100000000ULL, above_4g_mem_size, E820_RAM);
}
/* initialize hotplug memory address space */
if (ram_size < machine->maxram_size) {
ram_addr_t hotplug_mem_size =
machine->maxram_size - ram_size;
pcms->hotplug_memory_base =
ROUND_UP(0x100000000ULL + above_4g_mem_size, 1ULL << 30);
if ((pcms->hotplug_memory_base + hotplug_mem_size) <
hotplug_mem_size) {
error_report("unsupported amount of maximum memory: " RAM_ADDR_FMT,
machine->maxram_size);
exit(EXIT_FAILURE);
}
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);
}
/* Initialize PC system firmware */
pc_system_firmware_init(rom_memory, guest_info->isapc_ram_fw);

10
include/hw/i386/pc.h
View File

@ -16,9 +16,19 @@
#define HPET_INTCAP "hpet-intcap"
/**
* PCMachineState:
* @hotplug_memory_base: address in guest RAM address space where hotplug memory
* address space begins.
* @hotplug_memory: hotplug memory addess space container
*/
struct PCMachineState {
/*< private >*/
MachineState parent_obj;
/* <public> */
ram_addr_t hotplug_memory_base;
MemoryRegion hotplug_memory;
};
struct PCMachineClass {