From: Bibo Mao <maobibo@loongson.cn>
Date: Fri, 17 Oct 2025 06:45:17 +0000 (+0800)
Subject: hw/loongarch/virt: Add field ram_end in LoongArchVirtMachineState
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4150801bfd46a5b797dd1b7e5ec8fb5ac55f2cb7;p=thirdparty%2Fqemu.git

hw/loongarch/virt: Add field ram_end in LoongArchVirtMachineState

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>
Reviewed-by: Song Gao <gaosong@loongson.cn>
---

diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 6efa15da47..9d189e5a77 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 8a04dd8314..d7e94428f0 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")