DRAM region is dynamically set and the last valid physical address region
with LoongArch Virt Machine. To record the last valid physical address,
field ram_end is added in structure LoongArchVirtMachineState. In future
end address of DRAM cannot exceed base addres of PCIE 64-bit MMIO region.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 hw/loongarch/virt.c         | 2 ++
 include/hw/loongarch/virt.h | 1 +
 2 files changed, 3 insertions(+)

diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 49434ad182..2561a56378 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -849,8 +849,10 @@ static void virt_init(MachineState *machine)
             exit(EXIT_FAILURE);
         }
         machine_memory_devices_init(machine, base, device_mem_size);
+        base += device_mem_size;
     }
 
+    lvms->ram_end = base;
     /* load the BIOS image. */
     virt_firmware_init(lvms);
 
diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index 27b1755802..cfb2be4931 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -125,6 +125,7 @@ struct LoongArchVirtMachineState {
     uint64_t misc_feature;
     uint64_t misc_status;
     DeviceState *dintc;
+    hwaddr ram_end;
 };
 
 #define TYPE_LOONGARCH_VIRT_MACHINE  MACHINE_TYPE_NAME("virt")
-- 
2.39.3