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authorSven Schnelle <svens@linux.ibm.com>2022-10-05 11:17:40 +0300
committerAlexander Gordeev <agordeev@linux.ibm.com>2022-12-06 18:18:21 +0300
commit87fd22e0ae9239f695266d3181b53ad9f758bd74 (patch)
tree902546e6ac5f1457809d30ad8d3f7a513c8eda61 /drivers/s390
parent5de2322d7b8ecba37152334ebaaddf687fd63a38 (diff)
downloadlinux-87fd22e0ae9239f695266d3181b53ad9f758bd74.tar.xz
s390/ipl: add eckd support
This adds support to IPL from ECKD DASDs to linux. It introduces a few sysfs files in /sys/firmware/reipl/eckd: bootprog: the boot program selector clear: whether to issue a diag308 LOAD_NORMAL or LOAD_CLEAR device: the device to ipl from br_chr: Cylinder/Head/Record number to read the bootrecord from. Might be '0' or 'auto' if it should be read from the volume label. scpdata: data to be passed to the ipl'd program. The new ipl type is called 'eckd'. Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'drivers/s390')
-rw-r--r--drivers/s390/char/sclp_early.c4
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/s390/char/sclp_early.c b/drivers/s390/char/sclp_early.c
index d15b0d541de3..c1c70a161c0e 100644
--- a/drivers/s390/char/sclp_early.c
+++ b/drivers/s390/char/sclp_early.c
@@ -57,8 +57,10 @@ static void __init sclp_early_facilities_detect(void)
sclp.has_diag318 = !!(sccb->byte_134 & 0x80);
sclp.has_iplcc = !!(sccb->byte_134 & 0x02);
}
- if (sccb->cpuoff > 137)
+ if (sccb->cpuoff > 137) {
sclp.has_sipl = !!(sccb->cbl & 0x4000);
+ sclp.has_sipl_eckd = !!(sccb->cbl & 0x2000);
+ }
sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
sclp.rzm <<= 20;