diff mbox

[PULL,1/5] pc-dimm: add a function to calculate VM's current RAM size

Message ID 1425496415-6161-2-git-send-email-lcapitulino@redhat.com
State New
Headers show

Commit Message

Luiz Capitulino March 4, 2015, 7:13 p.m. UTC 
From: zhanghailiang <zhang.zhanghailiang@huawei.com>

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.zhanghailiang@huawei.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.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 mbox

Patch

diff --git a/hw/mem/pc-dimm.c b/hw/mem/pc-dimm.c
index f27a087..de81b9c 100644
--- a/hw/mem/pc-dimm.c
+++ b/hw/mem/pc-dimm.c
@@ -100,6 +100,32 @@  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;
+}