4 files changed, 172 insertions, 158 deletions

diff --git a/arch/s390/include/asm/kasan.h b/arch/s390/include/asm/kasan.h
index e5cfc81d5b61..0cffead0f2f2 100644
--- a/arch/s390/include/asm/kasan.h
+++ b/arch/s390/include/asm/kasan.h
@@ -2,7 +2,7 @@
 #ifndef __ASM_KASAN_H
 #define __ASM_KASAN_H
 
-#include <asm/pgtable.h>
+#include <linux/const.h>
 
 #ifdef CONFIG_KASAN
 
@@ -13,35 +13,6 @@
 #define KASAN_SHADOW_START	KASAN_SHADOW_OFFSET
 #define KASAN_SHADOW_END	(KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
 
-extern void kasan_early_init(void);
-
-/*
- * Estimate kasan memory requirements, which it will reserve
- * at the very end of available physical memory. To estimate
- * that, we take into account that kasan would require
- * 1/8 of available physical memory (for shadow memory) +
- * creating page tables for the shadow memory region.
- * To keep page tables estimates simple take the double of
- * combined ptes size.
- *
- * physmem parameter has to be already adjusted if not entire physical memory
- * would be used (e.g. due to effect of "mem=" option).
- */
-static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem)
-{
-	unsigned long kasan_needs;
-	unsigned long pages;
-	/* for shadow memory */
-	kasan_needs = round_up(physmem / 8, PAGE_SIZE);
-	/* for paging structures */
-	pages = DIV_ROUND_UP(kasan_needs, PAGE_SIZE);
-	kasan_needs += DIV_ROUND_UP(pages, _PAGE_ENTRIES) * _PAGE_TABLE_SIZE * 2;
-
-	return kasan_needs;
-}
-#else
-static inline void kasan_early_init(void) { }
-static inline unsigned long kasan_estimate_memory_needs(unsigned long physmem) { return 0; }
 #endif
 
 #endif
diff --git a/arch/s390/include/asm/mem_detect.h b/arch/s390/include/asm/mem_detect.h
deleted file mode 100644
index f9e7354036d2..000000000000
--- a/arch/s390/include/asm/mem_detect.h
+++ /dev/null
@@ -1,117 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 */
-#ifndef _ASM_S390_MEM_DETECT_H
-#define _ASM_S390_MEM_DETECT_H
-
-#include <linux/types.h>
-
-enum mem_info_source {
-	MEM_DETECT_NONE = 0,
-	MEM_DETECT_SCLP_STOR_INFO,
-	MEM_DETECT_DIAG260,
-	MEM_DETECT_SCLP_READ_INFO,
-	MEM_DETECT_BIN_SEARCH
-};
-
-struct mem_detect_block {
-	u64 start;
-	u64 end;
-};
-
-/*
- * Storage element id is defined as 1 byte (up to 256 storage elements).
- * In practise only storage element id 0 and 1 are used).
- * According to architecture one storage element could have as much as
- * 1020 subincrements. 255 mem_detect_blocks are embedded in mem_detect_info.
- * If more mem_detect_blocks are required, a block of memory from already
- * known mem_detect_block is taken (entries_extended points to it).
- */
-#define MEM_INLINED_ENTRIES 255 /* (PAGE_SIZE - 16) / 16 */
-
-struct mem_detect_info {
-	u32 count;
-	u8 info_source;
-	unsigned long usable;
-	struct mem_detect_block entries[MEM_INLINED_ENTRIES];
-	struct mem_detect_block *entries_extended;
-};
-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, bool respect_usable_limit)
-{
-	if (n >= mem_detect.count) {
-		*start = 0;
-		*end = 0;
-		return -1;
-	}
-
-	if (n < MEM_INLINED_ENTRIES) {
-		*start = (unsigned long)mem_detect.entries[n].start;
-		*end = (unsigned long)mem_detect.entries[n].end;
-	} else {
-		*start = (unsigned long)mem_detect.entries_extended[n - MEM_INLINED_ENTRIES].start;
-		*end = (unsigned long)mem_detect.entries_extended[n - MEM_INLINED_ENTRIES].end;
-	}
-
-	if (respect_usable_limit && mem_detect.usable) {
-		if (*start >= mem_detect.usable)
-			return -1;
-		if (*end > mem_detect.usable)
-			*end = mem_detect.usable;
-	}
-	return 0;
-}
-
-/**
- * for_each_mem_detect_usable_block - early online memory range iterator
- * @i: an integer used as loop variable
- * @p_start: ptr to unsigned long for start address of the range
- * @p_end: ptr to unsigned long for end address of the range
- *
- * Walks over detected online memory ranges below usable limit.
- */
-#define for_each_mem_detect_usable_block(i, p_start, p_end)		\
-	for (i = 0; !__get_mem_detect_block(i, p_start, p_end, true); i++)
-
-/* Walks over all detected online memory ranges disregarding usable limit. */
-#define for_each_mem_detect_block(i, p_start, p_end)		\
-	for (i = 0; !__get_mem_detect_block(i, p_start, p_end, false); i++)
-
-static inline unsigned long get_mem_detect_usable_total(void)
-{
-	unsigned long start, end, total = 0;
-	int i;
-
-	for_each_mem_detect_usable_block(i, &start, &end)
-		total += end - start;
-
-	return total;
-}
-
-static inline void get_mem_detect_reserved(unsigned long *start,
-					   unsigned long *size)
-{
-	*start = (unsigned long)mem_detect.entries_extended;
-	if (mem_detect.count > MEM_INLINED_ENTRIES)
-		*size = (mem_detect.count - MEM_INLINED_ENTRIES) * sizeof(struct mem_detect_block);
-	else
-		*size = 0;
-}
-
-static inline unsigned long get_mem_detect_end(void)
-{
-	unsigned long start;
-	unsigned long end;
-
-	if (mem_detect.usable)
-		return mem_detect.usable;
-	if (mem_detect.count) {
-		__get_mem_detect_block(mem_detect.count - 1, &start, &end, false);
-		return end;
-	}
-	return 0;
-}
-
-#endif
diff --git a/arch/s390/include/asm/physmem_info.h b/arch/s390/include/asm/physmem_info.h
new file mode 100644
index 000000000000..8e9c582592b3
--- /dev/null
+++ b/arch/s390/include/asm/physmem_info.h
@@ -0,0 +1,171 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_S390_MEM_DETECT_H
+#define _ASM_S390_MEM_DETECT_H
+
+#include <linux/types.h>
+
+enum physmem_info_source {
+	MEM_DETECT_NONE = 0,
+	MEM_DETECT_SCLP_STOR_INFO,
+	MEM_DETECT_DIAG260,
+	MEM_DETECT_SCLP_READ_INFO,
+	MEM_DETECT_BIN_SEARCH
+};
+
+struct physmem_range {
+	u64 start;
+	u64 end;
+};
+
+enum reserved_range_type {
+	RR_DECOMPRESSOR,
+	RR_INITRD,
+	RR_VMLINUX,
+	RR_AMODE31,
+	RR_IPLREPORT,
+	RR_CERT_COMP_LIST,
+	RR_MEM_DETECT_EXTENDED,
+	RR_VMEM,
+	RR_MAX
+};
+
+struct reserved_range {
+	unsigned long start;
+	unsigned long end;
+	struct reserved_range *chain;
+};
+
+/*
+ * Storage element id is defined as 1 byte (up to 256 storage elements).
+ * In practise only storage element id 0 and 1 are used).
+ * According to architecture one storage element could have as much as
+ * 1020 subincrements. 255 physmem_ranges are embedded in physmem_info.
+ * If more physmem_ranges are required, a block of memory from already
+ * known physmem_range is taken (online_extended points to it).
+ */
+#define MEM_INLINED_ENTRIES 255 /* (PAGE_SIZE - 16) / 16 */
+
+struct physmem_info {
+	u32 range_count;
+	u8 info_source;
+	unsigned long usable;
+	struct reserved_range reserved[RR_MAX];
+	struct physmem_range online[MEM_INLINED_ENTRIES];
+	struct physmem_range *online_extended;
+};
+
+extern struct physmem_info physmem_info;
+
+void add_physmem_online_range(u64 start, u64 end);
+
+static inline int __get_physmem_range(u32 n, unsigned long *start,
+				      unsigned long *end, bool respect_usable_limit)
+{
+	if (n >= physmem_info.range_count) {
+		*start = 0;
+		*end = 0;
+		return -1;
+	}
+
+	if (n < MEM_INLINED_ENTRIES) {
+		*start = (unsigned long)physmem_info.online[n].start;
+		*end = (unsigned long)physmem_info.online[n].end;
+	} else {
+		*start = (unsigned long)physmem_info.online_extended[n - MEM_INLINED_ENTRIES].start;
+		*end = (unsigned long)physmem_info.online_extended[n - MEM_INLINED_ENTRIES].end;
+	}
+
+	if (respect_usable_limit && physmem_info.usable) {
+		if (*start >= physmem_info.usable)
+			return -1;
+		if (*end > physmem_info.usable)
+			*end = physmem_info.usable;
+	}
+	return 0;
+}
+
+/**
+ * for_each_physmem_usable_range - early online memory range iterator
+ * @i: an integer used as loop variable
+ * @p_start: ptr to unsigned long for start address of the range
+ * @p_end: ptr to unsigned long for end address of the range
+ *
+ * Walks over detected online memory ranges below usable limit.
+ */
+#define for_each_physmem_usable_range(i, p_start, p_end)		\
+	for (i = 0; !__get_physmem_range(i, p_start, p_end, true); i++)
+
+/* Walks over all detected online memory ranges disregarding usable limit. */
+#define for_each_physmem_online_range(i, p_start, p_end)		\
+	for (i = 0; !__get_physmem_range(i, p_start, p_end, false); i++)
+
+static inline const char *get_physmem_info_source(void)
+{
+	switch (physmem_info.info_source) {
+	case MEM_DETECT_SCLP_STOR_INFO:
+		return "sclp storage info";
+	case MEM_DETECT_DIAG260:
+		return "diag260";
+	case MEM_DETECT_SCLP_READ_INFO:
+		return "sclp read info";
+	case MEM_DETECT_BIN_SEARCH:
+		return "binary search";
+	}
+	return "none";
+}
+
+#define RR_TYPE_NAME(t) case RR_ ## t: return #t
+static inline const char *get_rr_type_name(enum reserved_range_type t)
+{
+	switch (t) {
+	RR_TYPE_NAME(DECOMPRESSOR);
+	RR_TYPE_NAME(INITRD);
+	RR_TYPE_NAME(VMLINUX);
+	RR_TYPE_NAME(AMODE31);
+	RR_TYPE_NAME(IPLREPORT);
+	RR_TYPE_NAME(CERT_COMP_LIST);
+	RR_TYPE_NAME(MEM_DETECT_EXTENDED);
+	RR_TYPE_NAME(VMEM);
+	default:
+		return "UNKNOWN";
+	}
+}
+
+#define for_each_physmem_reserved_type_range(t, range, p_start, p_end)				\
+	for (range = &physmem_info.reserved[t], *p_start = range->start, *p_end = range->end;	\
+	     range && range->end; range = range->chain,						\
+	     *p_start = range ? range->start : 0, *p_end = range ? range->end : 0)
+
+static inline struct reserved_range *__physmem_reserved_next(enum reserved_range_type *t,
+							     struct reserved_range *range)
+{
+	if (!range) {
+		range = &physmem_info.reserved[*t];
+		if (range->end)
+			return range;
+	}
+	if (range->chain)
+		return range->chain;
+	while (++*t < RR_MAX) {
+		range = &physmem_info.reserved[*t];
+		if (range->end)
+			return range;
+	}
+	return NULL;
+}
+
+#define for_each_physmem_reserved_range(t, range, p_start, p_end)			\
+	for (t = 0, range = __physmem_reserved_next(&t, NULL),			\
+	    *p_start = range ? range->start : 0, *p_end = range ? range->end : 0;	\
+	     range; range = __physmem_reserved_next(&t, range),			\
+	    *p_start = range ? range->start : 0, *p_end = range ? range->end : 0)
+
+static inline unsigned long get_physmem_reserved(enum reserved_range_type type,
+						 unsigned long *addr, unsigned long *size)
+{
+	*addr = physmem_info.reserved[type].start;
+	*size = physmem_info.reserved[type].end - physmem_info.reserved[type].start;
+	return *size;
+}
+
+#endif
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index 5271bb278cfa..b28d250efbaa 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -74,10 +74,6 @@ extern unsigned int zlib_dfltcc_support;
 
 extern int noexec_disabled;
 extern unsigned long ident_map_size;
-extern unsigned long pgalloc_pos;
-extern unsigned long pgalloc_end;
-extern unsigned long pgalloc_low;
-extern unsigned long __amode31_base;
 
 /* The Write Back bit position in the physaddr is given by the SLPC PCI */
 extern unsigned long mio_wb_bit_mask;
@@ -150,13 +146,6 @@ static inline unsigned long kaslr_offset(void)
 	return __kaslr_offset;
 }
 
-extern int is_full_image;
-
-struct initrd_data {
-	unsigned long start;
-	unsigned long size;
-};
-extern struct initrd_data initrd_data;
 
 struct oldmem_data {
 	unsigned long start;