s390/sclp: detect conditional-external-interception facility

Let's detect if we have that facility.
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

arch/s390/include/asm/sclp.h

@@ -41,7 +41,8 @@ struct sclp_core_entry {
 	u8 reserved2[3];
 	u8 : 2;
 	u8 ib : 1;
-	u8 : 5;
+	u8 cei : 1;
+	u8 : 4;
 	u8 reserved3[6];
 	u8 type;
 	u8 reserved1;
@@ -69,6 +70,7 @@ struct sclp_info {
 	unsigned char has_cmma : 1;
 	unsigned char has_gsls : 1;
 	unsigned char has_ib : 1;
+	unsigned char has_cei : 1;
 	unsigned int ibc;
 	unsigned int mtid;
 	unsigned int mtid_cp;

drivers/s390/char/sclp_early.c

@@ -150,6 +150,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 		sclp.has_sief2 = cpue->sief2;
 		sclp.has_gpere = cpue->gpere;
 		sclp.has_ib = cpue->ib;
+		sclp.has_cei = cpue->cei;
 		break;
 	}