diff --git a/hypervisor/arch/x86/pm.c b/hypervisor/arch/x86/pm.c
index 2b3fa7ffd..d86bd9d7f 100644
--- a/hypervisor/arch/x86/pm.c
+++ b/hypervisor/arch/x86/pm.c
@@ -119,7 +119,8 @@ static uint32_t acpi_gas_read(const struct acpi_generic_address *gas)
 	return ret;
 }
 
-void do_acpi_s3(struct pm_s_state_data *sstate_data, uint32_t pm1a_cnt_val, uint32_t pm1b_cnt_val)
+/* This function supports enter S3 or S5 according to the value given to pm1a_cnt_val and pm1b_cnt_val */
+void do_acpi_sx(struct pm_s_state_data *sstate_data, uint32_t pm1a_cnt_val, uint32_t pm1b_cnt_val)
 {
 	uint32_t s1, s2;
 
diff --git a/hypervisor/arch/x86/wakeup.S b/hypervisor/arch/x86/wakeup.S
index 5cab6fa7f..1af674d1d 100644
--- a/hypervisor/arch/x86/wakeup.S
+++ b/hypervisor/arch/x86/wakeup.S
@@ -25,7 +25,7 @@
    .extern    restore_msrs
    .extern    cpu_ctx
    .extern    load_gdtr_and_tr
-   .extern    do_acpi_s3
+   .extern    do_acpi_sx
 
    .global    asm_enter_s3
 asm_enter_s3:
@@ -94,7 +94,7 @@ asm_enter_s3:
 	/*48U=0x30=CPU_CONTEXT_OFFSET_RSI*/
 	movq 0x30 + cpu_ctx(%rip), %rsi  /* pm1a_cnt_val */
 
-	call do_acpi_s3
+	call do_acpi_sx
 
 /*
  * When system resume from S3, trampoline_start64 will