The minimum memory size for LoongArch UEFI bios is 256M, also some
test cases such as migration and qos use 256M memory by default.

Here set minimum memory size for Loongarch VirtMachine with 256M rather
than 1G, so that test cases with 256M memory can pass to run.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
---
 hw/loongarch/virt.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/hw/loongarch/virt.c b/hw/loongarch/virt.c
index 8a6e2d6677..7d699c036b 100644
--- a/hw/loongarch/virt.c
+++ b/hw/loongarch/virt.c
@@ -919,8 +919,8 @@ static void virt_init(MachineState *machine)
         cpu_model = LOONGARCH_CPU_TYPE_NAME("la464");
     }
 
-    if (ram_size < 1 * GiB) {
-        error_report("ram_size must be greater than 1G.");
+    if (ram_size < 256 * MiB) {
+        error_report("ram_size must be greater than 256M.");
         exit(1);
     }
     create_fdt(vms);
-- 
2.39.3