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s390/mem_detect: move tprot loop to early boot phase

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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 <heiko.carstens@de.ibm.com>
Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Vasily Gorbik
2018-04-11 11:56:55 +02:00
committed by Martin Schwidefsky
parent 17aacfbfa1
commit 6966d604e2
11 changed files with 277 additions and 69 deletions
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17
drivers/s390/char/sclp_early_core.c
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@@ -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;
}