#define NXM_NX_REG2_W NXM_HEADER_W(0x0001, 2, 4)
#define NXM_NX_REG3 NXM_HEADER (0x0001, 3, 4)
#define NXM_NX_REG3_W NXM_HEADER_W(0x0001, 3, 4)
+#define NXM_NX_REG4 NXM_HEADER (0x0001, 4, 4)
+#define NXM_NX_REG4_W NXM_HEADER_W(0x0001, 4, 4)
/* Tunnel ID.
*