diff options
| author | Alexander Egorenkov <egorenar@linux.ibm.com> | 2021-09-03 09:39:48 +0200 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2022-04-25 13:54:12 +0200 |
| commit | 1b553839e1326b6a73431e399f575862696be51b (patch) | |
| tree | ef5b4d45e086df18e3e5d76892fbc4fb7ffcd935 | |
| parent | af2d861d4cd2a4da5137f795ee3509e6f944a25b (diff) | |
| download | linux-1b553839e1326b6a73431e399f575862696be51b.tar.gz linux-1b553839e1326b6a73431e399f575862696be51b.tar.bz2 linux-1b553839e1326b6a73431e399f575862696be51b.zip | |
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>
| -rw-r--r-- | arch/s390/include/asm/sclp.h | 1 | ||||
| -rw-r--r-- | drivers/s390/char/sclp_early.c | 4 |
2 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/include/asm/sclp.h b/arch/s390/include/asm/sclp.h index 04cb1e7582a6..236b34b75ddb 100644 --- a/arch/s390/include/asm/sclp.h +++ b/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; diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c index e9943a86c361..dd313ff57df3 100644 --- a/drivers/s390/char/sclp_early.c +++ b/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; |