The global parameter 'ram_size' does not take into account the hotplugged memory.
In some codes, we use 'ram_size' as current VM's real RAM size, which is not correct. Add function 'get_current_ram_size' to calculate VM's current RAM size, it will enumerate present memory devices and also plus ram_size. Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com> --- hw/mem/pc-dimm.c | 26 ++++++++++++++++++++++++++ include/exec/cpu-common.h | 1 + stubs/qmp_pc_dimm_device_list.c | 5 +++++ 3 files changed, 32 insertions(+) diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c index a800ea7..38465d0 100644 --- a/hw/mem/pc-dimm.c +++ b/hw/mem/pc-dimm.c @@ -62,6 +62,32 @@ int qmp_pc_dimm_device_list(Object *obj, void *opaque) return 0; } +ram_addr_t get_current_ram_size(void) +{ + MemoryDeviceInfoList *info_list = NULL; + MemoryDeviceInfoList **prev = &info_list; + MemoryDeviceInfoList *info; + ram_addr_t size = ram_size; + + qmp_pc_dimm_device_list(qdev_get_machine(), &prev); + for (info = info_list; info; info = info->next) { + MemoryDeviceInfo *value = info->value; + + if (value) { + switch (value->kind) { + case MEMORY_DEVICE_INFO_KIND_DIMM: + size += value->dimm->size; + break; + default: + break; + } + } + } + qapi_free_MemoryDeviceInfoList(info_list); + + return size; +} + static int pc_dimm_slot2bitmap(Object *obj, void *opaque) { unsigned long *bitmap = opaque; diff --git a/include/exec/cpu-common.h b/include/exec/cpu-common.h index 427b851..fcc3162 100644 --- a/include/exec/cpu-common.h +++ b/include/exec/cpu-common.h @@ -52,6 +52,7 @@ typedef uintptr_t ram_addr_t; #endif extern ram_addr_t ram_size; +ram_addr_t get_current_ram_size(void); /* memory API */ diff --git a/stubs/qmp_pc_dimm_device_list.c b/stubs/qmp_pc_dimm_device_list.c index 5cb220c..b584bd8 100644 --- a/stubs/qmp_pc_dimm_device_list.c +++ b/stubs/qmp_pc_dimm_device_list.c @@ -5,3 +5,8 @@ int qmp_pc_dimm_device_list(Object *obj, void *opaque) { return 0; } + +ram_addr_t get_current_ram_size(void) +{ + return ram_size; +} -- 1.7.12.4