1 files changed, 8 insertions, 0 deletions
diff --git a/hw/pc.c b/hw/pc.c
index 73dd8bcc4a..fe03704288 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -1135,6 +1135,14 @@ static void pc_init_isa(ram_addr_t ram_size, int vga_ram_size,
              initrd_filename, 0, cpu_model);
 }
 
+/* set CMOS shutdown status register (index 0xF) as S3_resume(0xFE)
+   BIOS will read it and start S3 resume at POST Entry */
+void cmos_set_s3_resume(void)
+{
+    if (rtc_state)
+        rtc_set_memory(rtc_state, 0xF, 0xFE);
+}
+
 QEMUMachine pc_machine = {
     .name = "pc",
     .desc = "Standard PC",