s390/sclp: add detection of IPL-complete-control facility

The presence of the IPL-complete-control facility can be derived
from the hypervisor's SCLP info response.
Signed-off-by: Alexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/sclp.h

@@ -87,6 +87,7 @@ struct sclp_info {
 	unsigned char has_diag318 : 1;
 	unsigned char has_sipl : 1;
 	unsigned char has_dirq : 1;
+	unsigned char has_iplcc : 1;
 	unsigned int ibc;
 	unsigned int mtid;
 	unsigned int mtid_cp;

drivers/s390/char/sclp_early.c

@@ -49,8 +49,10 @@ static void __init sclp_early_facilities_detect(void)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
 	if (sccb->fac91 & 0x40)
 		S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
-	if (sccb->cpuoff > 134)
+	if (sccb->cpuoff > 134) {
 		sclp.has_diag318 = !!(sccb->byte_134 & 0x80);
+		sclp.has_iplcc = !!(sccb->byte_134 & 0x02);
+	}
 	if (sccb->cpuoff > 137)
 		sclp.has_sipl = !!(sccb->cbl & 0x4000);
 	sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;