Commit 1b553839 authored by Alexander Egorenkov's avatar Alexander Egorenkov Committed by Heiko Carstens
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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: default avatarAlexander Egorenkov <egorenar@linux.ibm.com>
Reviewed-by: default avatarChristian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: default avatarHeiko Carstens <hca@linux.ibm.com>
parent af2d861d

arch/s390/include/asm/sclp.h

+1 −0
Original line number Diff line number Diff line
@@ -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

+3 −1
Original line number Diff line number Diff line
@@ -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;