diff --git a/sections/cper-section-cxl-protocol.h b/sections/cper-section-cxl-protocol.h
new file mode 100644
index 0000000..9dd5de4
--- /dev/null
+++ b/sections/cper-section-cxl-protocol.h
@@ -0,0 +1,55 @@
+#ifndef CPER_SECTION_CXL_PROTOCOL_H
+#define CPER_SECTION_CXL_PROTOCOL_H
+
+#include "json.h"
+#include "../edk/Cper.h"
+
+#define CXL_PROTOCOL_ERROR_VALID_BITFIELD_NAMES (const char*[]) {"cxlAgentTypeValid", "cxlAgentAddressValid", \
+    "deviceIDValid", "deviceSerialNumberValid", "capabilityStructureValid", "cxlDvsecValid", "cslErrorLogValid"}
+#define CXL_PROTOCOL_ERROR_AGENT_TYPES_KEYS (int []){0, 1}
+#define CXL_PROTOCOL_ERROR_AGENT_TYPES_VALUES (const char*[]){"CXL 1.1 Device", "CXL 1.1 Host Downstream Port"}
+#define CXL_PROTOCOL_ERROR_DEVICE_AGENT 0
+#define CXL_PROTOCOL_ERROR_HOST_DOWNSTREAM_PORT_AGENT 1
+
+///
+/// CXL Protocol Error Section
+///
+typedef struct {
+    UINT64 VendorId : 16;
+    UINT64 DeviceId : 16;
+    UINT64 SubsystemVendorId : 16;
+    UINT64 SubsystemDeviceId : 16;
+    UINT64 ClassCode : 16;
+    UINT64 Reserved1 : 3;
+    UINT64 SlotNumber : 13;
+    UINT64 Reserved2 : 32;
+} EFI_CXL_DEVICE_ID;
+
+typedef struct {
+    UINT64 FunctionNumber : 8;
+    UINT64 DeviceNumber : 8;
+    UINT64 BusNumber : 8;
+    UINT64 SegmentNumber : 16;
+    UINT64 Reserved : 24;
+} EFI_CXL_DEVICE_AGENT_ADDRESS;
+
+typedef union {
+    EFI_CXL_DEVICE_AGENT_ADDRESS DeviceAddress; //Active when the agent is a CXL1.1 device in CxlAgentType.
+    UINT64 PortRcrbBaseAddress; //Active when the agent is a CXL1.1 host downstream port in CxlAgentType.
+} EFI_CXL_AGENT_ADDRESS;
+
+typedef struct {
+    UINT64 ValidBits;
+    UINT64 CxlAgentType;
+    EFI_CXL_AGENT_ADDRESS CxlAgentAddress;
+    EFI_CXL_DEVICE_ID DeviceId;
+    UINT64 DeviceSerial;
+    EFI_PCIE_ERROR_DATA_CAPABILITY CapabilityStructure;
+    UINT16 CxlDvsecLength;
+    UINT16 CxlErrorLogLength;
+    UINT32 Reserved;
+} EFI_CXL_PROTOCOL_ERROR_DATA;
+
+json_object* cper_section_cxl_protocol_to_ir(void* section, EFI_ERROR_SECTION_DESCRIPTOR* descriptor);
+
+#endif
\ No newline at end of file