Hi, Igor
Igor Mammedov wrote:
Add DimmBus for memory hotplug below 4Gb or above 4Gb depending
on initial memory size and hotplug memory size.
...
+static
+void pc_hotplug_memory_init_impl(Object *owner,
+ MemoryRegion *system_memory,
+ ram_addr_t low_hotplug_mem_start,
+ ram_addr_t low_hotplug_mem_end,
+ DimmBus *hotplug_mem_bus,
+ ram_addr_t *high_mem_end)
+{
+ QemuOpts *opts = qemu_opts_find(qemu_find_opts("memory-opts"), NULL);
+ ram_addr_t ram_size = qemu_opt_get_size(opts, "mem", 0);
+ ram_addr_t maxmem = qemu_opt_get_size(opts, "maxmem", 0);
+ ram_addr_t hotplug_mem_size;
+
+ if (maxmem<= ram_size) {
+ /* Disable ACPI migration code and creation of memory devices in SSDT
*/
Why not give the memory that not be hot-added a chance to be placed on
one memory slot?
if all memory can be hot-added and hot-removed, then we can bring in
more flexibility for
memory hotplug feature.
Thanks!
+ qemu_opt_set_number(opts, "slots", 0);
+ return;
+ }
+
+ hotplug_mem_size = maxmem - ram_size;
+ if (hotplug_mem_size<= (low_hotplug_mem_end - low_hotplug_mem_start)) {
+ hotplug_mem_bus->base = low_hotplug_mem_start;
+ } else {
+ hotplug_mem_bus->base = ROUND_UP(*high_mem_end, 1ULL<< 30);
+ *high_mem_end = hotplug_mem_bus->base + hotplug_mem_size;
+ }
+
...
