diff --git a/src/soc/amd/common/block/smu/Kconfig b/src/soc/amd/common/block/smu/Kconfig
index 40195c9db3..4a76edb6f8 100644
--- a/src/soc/amd/common/block/smu/Kconfig
+++ b/src/soc/amd/common/block/smu/Kconfig
@@ -3,3 +3,10 @@ config SOC_AMD_COMMON_BLOCK_SMU
 	select SOC_AMD_COMMON_BLOCK_SMN
 	help
 	  Select this option to add functions to communicate with the SMU to the build.
+
+config SOC_AMD_COMMON_BLOCK_SMU_SX_ENTRY
+	bool
+	depends on SOC_AMD_COMMON_BLOCK_SMU
+	help
+	  Select this option to add the function to send the S3/4/5 entry
+	  message to the SMU.
diff --git a/src/soc/amd/common/block/smu/Makefile.inc b/src/soc/amd/common/block/smu/Makefile.inc
index 65ad6a7bcc..42bdf7006a 100644
--- a/src/soc/amd/common/block/smu/Makefile.inc
+++ b/src/soc/amd/common/block/smu/Makefile.inc
@@ -3,3 +3,5 @@ smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_SMU) += smu.c
 bootblock-$(CONFIG_SOC_AMD_COMMON_BLOCK_SMU) += smu.c
 romstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_SMU) += smu.c
 ramstage-$(CONFIG_SOC_AMD_COMMON_BLOCK_SMU) += smu.c
+
+smm-$(CONFIG_SOC_AMD_COMMON_BLOCK_SMU_SX_ENTRY) += smu_sx_entry.c
diff --git a/src/soc/amd/common/block/smu/smu_sx_entry.c b/src/soc/amd/common/block/smu/smu_sx_entry.c
new file mode 100644
index 0000000000..1496957117
--- /dev/null
+++ b/src/soc/amd/common/block/smu/smu_sx_entry.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <amdblocks/smu.h>
+#include <soc/smu.h>
+
+/*
+ * Request the SMU to put system into S3, S4, or S5. On entry, SlpTyp determines S-State and
+ * SlpTypeEn gets set by the SMU. Function does not return if successful.
+ */
+void smu_sx_entry(void)
+{
+	struct smu_payload msg = { 0 }; /* Unused for SMC_MSG_S3ENTRY */
+
+	printk(BIOS_DEBUG, "SMU: Put system into S3/S4/S5\n");
+	send_smu_message(SMC_MSG_S3ENTRY, &msg);
+}