From 6966d604e2ec4ecf5691aea953538f63597a250d Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Wed, 11 Apr 2018 11:56:55 +0200 Subject: s390/mem_detect: move tprot loop to early boot phase Move memory detection to early boot phase. To store online memory regions "struct mem_detect_info" has been introduced together with for_each_mem_detect_block iterator. mem_detect_info is later converted to memblock. Also introduces sclp_early_get_meminfo function to get maximum physical memory and maximum increment number. Reviewed-by: Heiko Carstens Reviewed-by: Martin Schwidefsky Signed-off-by: Vasily Gorbik Signed-off-by: Martin Schwidefsky --- drivers/s390/char/sclp_early_core.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'drivers/s390/char') diff --git a/drivers/s390/char/sclp_early_core.c b/drivers/s390/char/sclp_early_core.c index bbea2154a807..4f04ba689771 100644 --- a/drivers/s390/char/sclp_early_core.c +++ b/drivers/s390/char/sclp_early_core.c @@ -270,3 +270,20 @@ int __init sclp_early_get_info(struct read_info_sccb *info) *info = sclp_info_sccb; return 0; } + +int __init sclp_early_get_meminfo(unsigned long *mem, unsigned long *rzm) +{ + unsigned long rnmax; + unsigned long rnsize; + struct read_info_sccb *sccb = &sclp_info_sccb; + + if (!sclp_info_sccb_valid) + return -EIO; + + rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2; + rnsize = sccb->rnsize ? sccb->rnsize : sccb->rnsize2; + rnsize <<= 20; + *mem = rnsize * rnmax; + *rzm = rnsize; + return 0; +} -- cgit v1.2.3