s390/mem_detect: introduce SCLP storage info

SCLP storage info allows to detect continuous and non-continuous online
memory under LPAR, z/VM and KVM, when standby memory is defined.

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>

arch/s390/include/asm/mem_detect.h

@@ -6,6 +6,7 @@
 
 enum mem_info_source {
 	MEM_DETECT_NONE = 0,
+	MEM_DETECT_SCLP_STOR_INFO,
 	MEM_DETECT_TPROT_LOOP
 };
 
@@ -32,6 +33,8 @@ struct mem_detect_info {
 };
 extern struct mem_detect_info mem_detect;
 
+void add_mem_detect_block(u64 start, u64 end);
+
 static inline int __get_mem_detect_block(u32 n, unsigned long *start,
 					 unsigned long *end)
 {

arch/s390/include/asm/sclp.h

@@ -106,6 +106,7 @@ struct zpci_report_error_header {
 } __packed;
 
 int sclp_early_read_info(void);
+int sclp_early_read_storage_info(void);
 int sclp_early_get_core_info(struct sclp_core_info *info);
 void sclp_early_get_ipl_info(struct sclp_ipl_info *info);
 void sclp_early_detect(void);