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
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);
* 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>
/*
* 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
* (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).
*
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)
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)
unsigned long get_random_base(unsigned long safe_addr)
{
- unsigned long usable_total = get_mem_detect_usable_total();
- unsigned long memory_limit = get_mem_detect_end();
+ unsigned long usable_total = get_physmem_usable_total();
+ unsigned long memory_limit = get_physmem_usable_end();
unsigned long base_pos, max_pos, kernel_size;
int i;
#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 &mem_detect.entries_extended[n - MEM_INLINED_ENTRIES];
+ return &physmem_info.online[n];
+ return &physmem_info.online_extended[n - MEM_INLINED_ENTRIES];
}
/*
- * sequential calls to add_mem_detect_block with adjacent memory areas
- * are merged together into single memory block.
+ * sequential calls to add_physmem_online_range with adjacent memory ranges
+ * 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) {
- block = __get_mem_detect_block_ptr(mem_detect.count - 1);
- if (block->end == start) {
- block->end = end;
+ if (physmem_info.range_count) {
+ range = __get_physmem_range_ptr(physmem_info.range_count - 1);
+ if (range->end == start) {
+ range->end = end;
return;
}
}
- block = __get_mem_detect_block_ptr(mem_detect.count);
- block->start = start;
- block->end = end;
- mem_detect.count++;
+ range = __get_physmem_range_ptr(physmem_info.range_count);
+ range->start = start;
+ range->end = end;
+ physmem_info.range_count++;
}
static int __diag260(unsigned long rx1, unsigned long rx2)
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;
}
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;
- max_physmem_end = max_physmem_end ?: get_mem_detect_end();
+ physmem_info.info_source = MEM_DETECT_DIAG260;
+ max_physmem_end = max_physmem_end ?: get_physmem_usable_end();
} else if (max_physmem_end) {
- add_mem_detect_block(0, max_physmem_end);
- mem_detect.info_source = MEM_DETECT_SCLP_READ_INFO;
+ add_physmem_online_range(0, max_physmem_end);
+ physmem_info.info_source = MEM_DETECT_SCLP_READ_INFO;
} else {
max_physmem_end = search_mem_end();
- add_mem_detect_block(0, max_physmem_end);
- mem_detect.info_source = MEM_DETECT_BIN_SEARCH;
+ add_physmem_online_range(0, max_physmem_end);
+ physmem_info.info_source = MEM_DETECT_BIN_SEARCH;
}
- if (mem_detect.count > MEM_INLINED_ENTRIES) {
- *safe_addr += (mem_detect.count - MEM_INLINED_ENTRIES) *
- sizeof(struct mem_detect_block);
+ if (physmem_info.range_count > MEM_INLINED_ENTRIES) {
+ *safe_addr += (physmem_info.range_count - MEM_INLINED_ENTRIES) *
+ 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++) {
- block = __get_mem_detect_block_ptr(i);
- if (block->start >= limit)
+ for (i = 0; i < physmem_info.range_count; i++) {
+ range = __get_physmem_range_ptr(i);
+ if (range->start >= limit)
break;
- if (block->end >= limit) {
- mem_detect.usable = limit;
+ if (range->end >= limit) {
+ physmem_info.usable = limit;
break;
}
- mem_detect.usable = block->end;
+ physmem_info.usable = range->end;
}
}
#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"
*
* 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.
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);
#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"
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();
*/
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);
+++ /dev/null
-/* 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
--- /dev/null
+/* 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
#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>
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);
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:
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);
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();
#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>
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);
* +- 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;
#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"
#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;
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:
return 0;
fail:
- mem_detect.count = 0;
+ physmem_info.range_count = 0;
return -EIO;
}
projects / thirdparty / linux.git / commitdiff
