vmstate, memory: decouple vmstate from memory API

Currently creating a memory region automatically registers it for
live migration.  This differs from other state (which is enumerated
in a VMStateDescription structure) and ties the live migration code
into the memory core.

Decouple the two by introducing a separate API, vmstate_register_ram(),
for registering a RAM block for migration.  Currently the same
implementation is reused, but later it can be moved into a separate list,
and registrations can be moved to VMStateDescription blocks.

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 6 insertions, 3 deletions

diff --git a/hw/shix.c b/hw/shix.c
index e0c2200..e259c17 100644
--- a/hw/shix.c
+++ b/hw/shix.c
@@ -57,14 +57,17 @@ static void shix_init(ram_addr_t ram_size,
 
     /* Allocate memory space */
     printf("Allocating ROM\n");
-    memory_region_init_ram(rom, NULL, "shix.rom", 0x4000);
+    memory_region_init_ram(rom, "shix.rom", 0x4000);
+    vmstate_register_ram_global(rom);
     memory_region_set_readonly(rom, true);
     memory_region_add_subregion(sysmem, 0x00000000, rom);
     printf("Allocating SDRAM 1\n");
-    memory_region_init_ram(&sdram[0], NULL, "shix.sdram1", 0x01000000);
+    memory_region_init_ram(&sdram[0], "shix.sdram1", 0x01000000);
+    vmstate_register_ram_global(&sdram[0]);
     memory_region_add_subregion(sysmem, 0x08000000, &sdram[0]);
     printf("Allocating SDRAM 2\n");
-    memory_region_init_ram(&sdram[1], NULL, "shix.sdram2", 0x01000000);
+    memory_region_init_ram(&sdram[1], "shix.sdram2", 0x01000000);
+    vmstate_register_ram_global(&sdram[1]);
     memory_region_add_subregion(sysmem, 0x0c000000, &sdram[1]);
 
     /* Load BIOS in 0 (and access it through P2, 0xA0000000) */