s390/boot: rename mem_detect to physmem_info

In preparation to extending mem_detect with additional information like
reserved ranges rename it to more generic physmem_info. This new naming
also help to avoid confusion by using more exact terms like "physmem
online ranges", etc.

Acked-by: Heiko Carstens <hca@linux.ibm.com>
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/boot/Makefile

@@ -35,7 +35,7 @@ endif
 
 CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
 
-obj-y	:= head.o als.o startup.o mem_detect.o ipl_parm.o ipl_report.o vmem.o
+obj-y	:= head.o als.o startup.o physmem_info.o ipl_parm.o ipl_report.o vmem.o
 obj-y	+= string.o ebcdic.o sclp_early_core.o mem.o ipl_vmparm.o cmdline.o
 obj-y	+= version.o pgm_check_info.o ctype.o ipl_data.o machine_kexec_reloc.o
 obj-$(findstring y, $(CONFIG_PROTECTED_VIRTUALIZATION_GUEST) $(CONFIG_PGSTE))	+= uv.o

arch/s390/boot/boot.h

@@ -34,7 +34,7 @@ struct vmlinux_info {
 
 void startup_kernel(void);
 unsigned long detect_memory(unsigned long *safe_addr);
-void mem_detect_set_usable_limit(unsigned long limit);
+void physmem_set_usable_limit(unsigned long limit);
 bool is_ipl_block_dump(void);
 void store_ipl_parmblock(void);
 unsigned long read_ipl_report(unsigned long safe_addr);

arch/s390/boot/kaslr.c

@@ -3,7 +3,7 @@
  * Copyright IBM Corp. 2019
  */
 #include <linux/pgtable.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/cpacf.h>
 #include <asm/timex.h>
 #include <asm/sclp.h>
@@ -93,7 +93,7 @@ static int get_random(unsigned long limit, unsigned long *value)
 
 /*
  * To randomize kernel base address we have to consider several facts:
- * 1. physical online memory might not be continuous and have holes. mem_detect
+ * 1. physical online memory might not be continuous and have holes. physmem
  *    info contains list of online memory ranges we should consider.
  * 2. we have several memory regions which are occupied and we should not
  *    overlap and destroy them. Currently safe_addr tells us the border below
@@ -108,7 +108,7 @@ static int get_random(unsigned long limit, unsigned long *value)
  *    (16 pages when the kernel is built with kasan enabled)
  * Assumptions:
  * 1. kernel size (including .bss size) and upper memory limit are page aligned.
- * 2. mem_detect memory region start is THREAD_SIZE aligned / end is PAGE_SIZE
+ * 2. physmem online region start is THREAD_SIZE aligned / end is PAGE_SIZE
  *    aligned (in practice memory configurations granularity on z/VM and LPAR
  *    is 1mb).
  *
@@ -132,7 +132,7 @@ static unsigned long count_valid_kernel_positions(unsigned long kernel_size,
 	unsigned long start, end, pos = 0;
 	int i;
 
-	for_each_mem_detect_usable_block(i, &start, &end) {
+	for_each_physmem_usable_range(i, &start, &end) {
 		if (_min >= end)
 			continue;
 		if (start >= _max)
@@ -153,7 +153,7 @@ static unsigned long position_to_address(unsigned long pos, unsigned long kernel
 	unsigned long start, end;
 	int i;
 
-	for_each_mem_detect_usable_block(i, &start, &end) {
+	for_each_physmem_usable_range(i, &start, &end) {
 		if (_min >= end)
 			continue;
 		if (start >= _max)
@@ -172,8 +172,8 @@ static unsigned long position_to_address(unsigned long pos, unsigned long kernel
 
 unsigned long get_random_base(unsigned long safe_addr)
 {
-	unsigned long usable_total = get_mem_detect_usable_total();
+	unsigned long usable_total = get_physmem_usable_total();
-	unsigned long memory_limit = get_mem_detect_end();
+	unsigned long memory_limit = get_physmem_usable_end();
 	unsigned long base_pos, max_pos, kernel_size;
 	int i;
 

arch/s390/boot/physmem_info.c

@@ -5,44 +5,44 @@
 #include <asm/processor.h>
 #include <asm/sclp.h>
 #include <asm/sections.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/sparsemem.h>
 #include "decompressor.h"
 #include "boot.h"
 
-struct mem_detect_info __bootdata(mem_detect);
+struct physmem_info __bootdata(physmem_info);
 
 /* up to 256 storage elements, 1020 subincrements each */
 #define ENTRIES_EXTENDED_MAX						       \
-	(256 * (1020 / 2) * sizeof(struct mem_detect_block))
+	(256 * (1020 / 2) * sizeof(struct physmem_range))
 
-static struct mem_detect_block *__get_mem_detect_block_ptr(u32 n)
+static struct physmem_range *__get_physmem_range_ptr(u32 n)
 {
 	if (n < MEM_INLINED_ENTRIES)
-		return &mem_detect.entries[n];
+		return &physmem_info.online[n];
-	return &mem_detect.entries_extended[n - MEM_INLINED_ENTRIES];
+	return &physmem_info.online_extended[n - MEM_INLINED_ENTRIES];
 }
 
 /*
- * sequential calls to add_mem_detect_block with adjacent memory areas
+ * sequential calls to add_physmem_online_range with adjacent memory ranges
- * are merged together into single memory block.
+ * are merged together into single memory range.
  */
-void add_mem_detect_block(u64 start, u64 end)
+void add_physmem_online_range(u64 start, u64 end)
 {
-	struct mem_detect_block *block;
+	struct physmem_range *range;
 
-	if (mem_detect.count) {
+	if (physmem_info.range_count) {
-		block = __get_mem_detect_block_ptr(mem_detect.count - 1);
+		range = __get_physmem_range_ptr(physmem_info.range_count - 1);
-		if (block->end == start) {
+		if (range->end == start) {
-			block->end = end;
+			range->end = end;
 			return;
 		}
 	}
 
-	block = __get_mem_detect_block_ptr(mem_detect.count);
+	range = __get_physmem_range_ptr(physmem_info.range_count);
-	block->start = start;
+	range->start = start;
-	block->end = end;
+	range->end = end;
-	mem_detect.count++;
+	physmem_info.range_count++;
 }
 
 static int __diag260(unsigned long rx1, unsigned long rx2)
@@ -95,7 +95,7 @@ static int diag260(void)
 		return -1;
 
 	for (i = 0; i < min_t(int, rc, ARRAY_SIZE(storage_extents)); i++)
-		add_mem_detect_block(storage_extents[i].start, storage_extents[i].end + 1);
+		add_physmem_online_range(storage_extents[i].start, storage_extents[i].end + 1);
 	return 0;
 }
 
@@ -148,44 +148,44 @@ unsigned long detect_memory(unsigned long *safe_addr)
 	unsigned long max_physmem_end = 0;
 
 	sclp_early_get_memsize(&max_physmem_end);
-	mem_detect.entries_extended = (struct mem_detect_block *)ALIGN(*safe_addr, sizeof(u64));
+	physmem_info.online_extended = (struct physmem_range *)ALIGN(*safe_addr, sizeof(u64));
 
 	if (!sclp_early_read_storage_info()) {
-		mem_detect.info_source = MEM_DETECT_SCLP_STOR_INFO;
+		physmem_info.info_source = MEM_DETECT_SCLP_STOR_INFO;
 	} else if (!diag260()) {
-		mem_detect.info_source = MEM_DETECT_DIAG260;
+		physmem_info.info_source = MEM_DETECT_DIAG260;
-		max_physmem_end = max_physmem_end ?: get_mem_detect_end();
+		max_physmem_end = max_physmem_end ?: get_physmem_usable_end();
 	} else if (max_physmem_end) {
-		add_mem_detect_block(0, max_physmem_end);
+		add_physmem_online_range(0, max_physmem_end);
-		mem_detect.info_source = MEM_DETECT_SCLP_READ_INFO;
+		physmem_info.info_source = MEM_DETECT_SCLP_READ_INFO;
 	} else {
 		max_physmem_end = search_mem_end();
-		add_mem_detect_block(0, max_physmem_end);
+		add_physmem_online_range(0, max_physmem_end);
-		mem_detect.info_source = MEM_DETECT_BIN_SEARCH;
+		physmem_info.info_source = MEM_DETECT_BIN_SEARCH;
 	}
 
-	if (mem_detect.count > MEM_INLINED_ENTRIES) {
+	if (physmem_info.range_count > MEM_INLINED_ENTRIES) {
-		*safe_addr += (mem_detect.count - MEM_INLINED_ENTRIES) *
+		*safe_addr += (physmem_info.range_count - MEM_INLINED_ENTRIES) *
-			     sizeof(struct mem_detect_block);
+			      sizeof(struct physmem_range);
 	}
 
 	return max_physmem_end;
 }
 
-void mem_detect_set_usable_limit(unsigned long limit)
+void physmem_set_usable_limit(unsigned long limit)
 {
-	struct mem_detect_block *block;
+	struct physmem_range *range;
 	int i;
 
 	/* make sure mem_detect.usable ends up within online memory block */
-	for (i = 0; i < mem_detect.count; i++) {
+	for (i = 0; i < physmem_info.range_count; i++) {
-		block = __get_mem_detect_block_ptr(i);
+		range = __get_physmem_range_ptr(i);
-		if (block->start >= limit)
+		if (range->start >= limit)
 			break;
-		if (block->end >= limit) {
+		if (range->end >= limit) {
-			mem_detect.usable = limit;
+			physmem_info.usable = limit;
 			break;
 		}
-		mem_detect.usable = block->end;
+		physmem_info.usable = range->end;
 	}
 }

arch/s390/boot/startup.c

@@ -12,7 +12,7 @@
 #include <asm/diag.h>
 #include <asm/uv.h>
 #include <asm/abs_lowcore.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include "decompressor.h"
 #include "boot.h"
 #include "uv.h"
@@ -139,7 +139,7 @@ static void handle_relocs(unsigned long offset)
  *
  * Consider the following factors:
  * 1. max_physmem_end - end of physical memory online or standby.
- *    Always <= end of the last online memory block (get_mem_detect_end()).
+ *    Always >= end of the last online memory range (get_physmem_online_end()).
  * 2. CONFIG_MAX_PHYSMEM_BITS - the maximum size of physical memory the
  *    kernel is able to support.
  * 3. "mem=" kernel command line option which limits physical memory usage.
@@ -303,7 +303,7 @@ void startup_kernel(void)
 	setup_ident_map_size(max_physmem_end);
 	setup_vmalloc_size();
 	asce_limit = setup_kernel_memory_layout();
-	mem_detect_set_usable_limit(ident_map_size);
+	physmem_set_usable_limit(ident_map_size);
 
 	if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_enabled) {
 		random_lma = get_random_base(safe_addr);

arch/s390/boot/vmem.c

@@ -4,7 +4,7 @@
 #include <asm/pgalloc.h>
 #include <asm/facility.h>
 #include <asm/sections.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/maccess.h>
 #include <asm/abs_lowcore.h>
 #include "decompressor.h"
@@ -51,7 +51,7 @@ static void pgtable_populate_init(void)
 		pgalloc_low = max(pgalloc_low, initrd_end);
 	}
 
-	pgalloc_end = round_down(get_mem_detect_end(), PAGE_SIZE);
+	pgalloc_end = round_down(get_physmem_usable_end(), PAGE_SIZE);
 	pgalloc_pos = pgalloc_end;
 
 	boot_check_oom();
@@ -252,7 +252,7 @@ void setup_vmem(unsigned long asce_limit)
 	 */
 	pgtable_populate_init();
 	pgtable_populate(0, sizeof(struct lowcore), POPULATE_ONE2ONE);
-	for_each_mem_detect_usable_block(i, &start, &end)
+	for_each_physmem_usable_range(i, &start, &end)
 		pgtable_populate(start, end, POPULATE_ONE2ONE);
 	pgtable_populate(__abs_lowcore, __abs_lowcore + sizeof(struct lowcore),
 			 POPULATE_ABS_LOWCORE);

arch/s390/include/asm/mem_detect.h

@@ -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

arch/s390/include/asm/physmem_info.h

@@ -0,0 +1,118 @@
+/* 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;
+};
+
+/*
+ * 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 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 unsigned long get_physmem_usable_total(void)
+{
+	unsigned long start, end, total = 0;
+	int i;
+
+	for_each_physmem_usable_range(i, &start, &end)
+		total += end - start;
+
+	return total;
+}
+
+static inline void get_physmem_reserved(unsigned long *start, unsigned long *size)
+{
+	*start = (unsigned long)physmem_info.online_extended;
+	if (physmem_info.range_count > MEM_INLINED_ENTRIES)
+		*size = (physmem_info.range_count - MEM_INLINED_ENTRIES) *
+			sizeof(struct physmem_range);
+	else
+		*size = 0;
+}
+
+static inline unsigned long get_physmem_usable_end(void)
+{
+	unsigned long start;
+	unsigned long end;
+
+	if (physmem_info.usable)
+		return physmem_info.usable;
+	if (physmem_info.range_count) {
+		__get_physmem_range(physmem_info.range_count - 1, &start, &end, false);
+		return end;
+	}
+	return 0;
+}
+
+#endif

arch/s390/kernel/setup.c

@@ -74,7 +74,7 @@
 #include <asm/numa.h>
 #include <asm/alternative.h>
 #include <asm/nospec-branch.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/maccess.h>
 #include <asm/uv.h>
 #include <asm/asm-offsets.h>
@@ -147,7 +147,7 @@ static u32 __amode31_ref *__ctl_duct = __ctl_duct_amode31;
 
 int __bootdata(noexec_disabled);
 unsigned long __bootdata(ident_map_size);
-struct mem_detect_info __bootdata(mem_detect);
+struct physmem_info __bootdata(physmem_info);
 struct initrd_data __bootdata(initrd_data);
 unsigned long __bootdata(pgalloc_pos);
 unsigned long __bootdata(pgalloc_end);
@@ -730,27 +730,27 @@ static void __init reserve_certificate_list(void)
 		memblock_reserve(ipl_cert_list_addr, ipl_cert_list_size);
 }
 
-static void __init reserve_mem_detect_info(void)
+static void __init reserve_physmem_info(void)
 {
 	unsigned long start, size;
 
-	get_mem_detect_reserved(&start, &size);
+	get_physmem_reserved(&start, &size);
 	if (size)
 		memblock_reserve(start, size);
 }
 
-static void __init free_mem_detect_info(void)
+static void __init free_physmem_info(void)
 {
 	unsigned long start, size;
 
-	get_mem_detect_reserved(&start, &size);
+	get_physmem_reserved(&start, &size);
 	if (size)
 		memblock_phys_free(start, size);
 }
 
 static const char * __init get_mem_info_source(void)
 {
-	switch (mem_detect.info_source) {
+	switch (physmem_info.info_source) {
 	case MEM_DETECT_SCLP_STOR_INFO:
 		return "sclp storage info";
 	case MEM_DETECT_DIAG260:
@@ -763,18 +763,18 @@ static const char * __init get_mem_info_source(void)
 	return "none";
 }
 
-static void __init memblock_add_mem_detect_info(void)
+static void __init memblock_add_physmem_info(void)
 {
 	unsigned long start, end;
 	int i;
 
 	pr_debug("physmem info source: %s (%hhd)\n",
-		 get_mem_info_source(), mem_detect.info_source);
+		 get_mem_info_source(), physmem_info.info_source);
 	/* keep memblock lists close to the kernel */
 	memblock_set_bottom_up(true);
-	for_each_mem_detect_usable_block(i, &start, &end)
+	for_each_physmem_usable_range(i, &start, &end)
 		memblock_add(start, end - start);
-	for_each_mem_detect_block(i, &start, &end)
+	for_each_physmem_online_range(i, &start, &end)
 		memblock_physmem_add(start, end - start);
 	memblock_set_bottom_up(false);
 	memblock_set_node(0, ULONG_MAX, &memblock.memory, 0);
@@ -997,14 +997,14 @@ void __init setup_arch(char **cmdline_p)
 	reserve_kernel();
 	reserve_initrd();
 	reserve_certificate_list();
-	reserve_mem_detect_info();
+	reserve_physmem_info();
 	memblock_set_current_limit(ident_map_size);
 	memblock_allow_resize();
 
 	/* Get information about *all* installed memory */
-	memblock_add_mem_detect_info();
+	memblock_add_physmem_info();
 
-	free_mem_detect_info();
+	free_physmem_info();
 	setup_memory_end();
 	memblock_dump_all();
 	setup_memory();

arch/s390/mm/kasan_init.c

@@ -4,7 +4,7 @@
 #include <linux/pgtable.h>
 #include <asm/pgalloc.h>
 #include <asm/kasan.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/processor.h>
 #include <asm/sclp.h>
 #include <asm/facility.h>
@@ -244,7 +244,7 @@ void __init kasan_early_init(void)
 	memset64((u64 *)kasan_early_shadow_pte, pte_val(pte_z), PTRS_PER_PTE);
 
 	if (has_edat) {
-		shadow_alloc_size = get_mem_detect_usable_total() >> KASAN_SHADOW_SCALE_SHIFT;
+		shadow_alloc_size = get_physmem_usable_total() >> KASAN_SHADOW_SCALE_SHIFT;
 		segment_pos = round_down(pgalloc_pos, _SEGMENT_SIZE);
 		segment_low = segment_pos - shadow_alloc_size;
 		segment_low = round_down(segment_low, _SEGMENT_SIZE);
@@ -282,7 +282,7 @@ void __init kasan_early_init(void)
 	 * +- shadow end ----+---------+- shadow end ---+
 	 */
 	/* populate kasan shadow (for identity mapping and zero page mapping) */
-	for_each_mem_detect_usable_block(i, &start, &end)
+	for_each_physmem_usable_range(i, &start, &end)
 		kasan_early_pgtable_populate(__sha(start), __sha(end), POPULATE_MAP);
 	if (IS_ENABLED(CONFIG_KASAN_VMALLOC)) {
 		untracked_end = VMALLOC_START;

drivers/s390/char/sclp_early_core.c

@@ -10,7 +10,7 @@
 #include <asm/ebcdic.h>
 #include <asm/irq.h>
 #include <asm/sections.h>
-#include <asm/mem_detect.h>
+#include <asm/physmem_info.h>
 #include <asm/facility.h>
 #include "sclp.h"
 #include "sclp_rw.h"
@@ -336,7 +336,7 @@ int __init sclp_early_get_hsa_size(unsigned long *hsa_size)
 
 #define SCLP_STORAGE_INFO_FACILITY     0x0000400000000000UL
 
-void __weak __init add_mem_detect_block(u64 start, u64 end) {}
+void __weak __init add_physmem_online_range(u64 start, u64 end) {}
 int __init sclp_early_read_storage_info(void)
 {
 	struct read_storage_sccb *sccb = (struct read_storage_sccb *)sclp_early_sccb;
@@ -369,7 +369,7 @@ int __init sclp_early_read_storage_info(void)
 				if (!sccb->entries[sn])
 					continue;
 				rn = sccb->entries[sn] >> 16;
-				add_mem_detect_block((rn - 1) * rzm, rn * rzm);
+				add_physmem_online_range((rn - 1) * rzm, rn * rzm);
 			}
 			break;
 		case 0x0310:
@@ -382,6 +382,6 @@ int __init sclp_early_read_storage_info(void)
 
 	return 0;
 fail:
-	mem_detect.count = 0;
+	physmem_info.range_count = 0;
 	return -EIO;
 }