From b09decfd99f8258408decfaa07c5cce6c06fe2cf Mon Sep 17 00:00:00 2001 From: Vasily Gorbik Date: Fri, 13 Apr 2018 17:37:28 +0200 Subject: s390/sclp: introduce sclp_early_get_hsa_size Introduce sclp_early_get_hsa_size function to be used during early memory detection. This function allows to find a memory limit imposed during zfcpdump. 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 | 11 +++++++++++ 1 file changed, 11 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 acfe09313852..387c114ded3f 100644 --- a/drivers/s390/char/sclp_early_core.c +++ b/drivers/s390/char/sclp_early_core.c @@ -288,6 +288,17 @@ int __init sclp_early_get_memsize(unsigned long *mem) return 0; } +int __init sclp_early_get_hsa_size(unsigned long *hsa_size) +{ + if (!sclp_info_sccb_valid) + return -EIO; + + *hsa_size = 0; + if (sclp_info_sccb.hsa_size) + *hsa_size = (sclp_info_sccb.hsa_size - 1) * PAGE_SIZE; + return 0; +} + #define SCLP_STORAGE_INFO_FACILITY 0x0000400000000000UL void __weak __init add_mem_detect_block(u64 start, u64 end) {} -- cgit v1.2.3