s390/sclp: detect guest-PER enhancement

Let's detect that facility, so we can correctly handle its abscence.
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@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

@@ -33,7 +33,8 @@ struct sclp_core_entry {
 	u8 : 4;
 	u8 sief2 : 1;
 	u8 : 3;
-	u8 : 3;
+	u8 : 2;
+	u8 gpere : 1;
 	u8 siif : 1;
 	u8 sigpif : 1;
 	u8 : 3;
@@ -60,6 +61,7 @@ struct sclp_info {
 	unsigned char has_esca : 1;
 	unsigned char has_sief2 : 1;
 	unsigned char has_64bscao : 1;
+	unsigned char has_gpere : 1;
 	unsigned int ibc;
 	unsigned int mtid;
 	unsigned int mtid_cp;

drivers/s390/char/sclp_early.c

@@ -146,6 +146,7 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
 		sclp.has_siif = cpue->siif;
 		sclp.has_sigpif = cpue->sigpif;
 		sclp.has_sief2 = cpue->sief2;
+		sclp.has_gpere = cpue->gpere;
 		break;
 	}