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-rw-r--r--arch/s390/Kconfig3
-rw-r--r--arch/s390/include/asm/setup.h16
-rw-r--r--arch/s390/kernel/crash_dump.c83
-rw-r--r--arch/s390/kernel/early.c6
-rw-r--r--arch/s390/kernel/head31.S1
-rw-r--r--arch/s390/kernel/setup.c451
-rw-r--r--arch/s390/kernel/topology.c4
-rw-r--r--arch/s390/mm/mem_detect.c130
-rw-r--r--arch/s390/mm/vmem.c30
-rw-r--r--drivers/s390/char/zcore.c44
10 files changed, 270 insertions, 498 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index d68fe34799b0..d239e6afb923 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -60,7 +60,6 @@ config PCI_QUIRKS
config S390
def_bool y
- select ARCH_DISCARD_MEMBLOCK
select ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE
select ARCH_HAS_DEBUG_STRICT_USER_COPY_CHECKS
select ARCH_HAVE_NMI_SAFE_CMPXCHG
@@ -130,6 +129,7 @@ config S390
select HAVE_KVM if 64BIT
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
+ select HAVE_MEMBLOCK_PHYS_MAP
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_OPROFILE
select HAVE_PERF_EVENTS
@@ -139,6 +139,7 @@ config S390
select HAVE_VIRT_CPU_ACCOUNTING
select KTIME_SCALAR if 32BIT
select MODULES_USE_ELF_RELA
+ select NO_BOOTMEM
select OLD_SIGACTION
select OLD_SIGSUSPEND3
select SYSCTL_EXCEPTION_TRACE
diff --git a/arch/s390/include/asm/setup.h b/arch/s390/include/asm/setup.h
index b31b22dba948..089a49814c50 100644
--- a/arch/s390/include/asm/setup.h
+++ b/arch/s390/include/asm/setup.h
@@ -9,7 +9,6 @@
#define PARMAREA 0x10400
-#define MEMORY_CHUNKS 256
#ifndef __ASSEMBLY__
@@ -31,22 +30,11 @@
#endif /* CONFIG_64BIT */
#define COMMAND_LINE ((char *) (0x10480))
-#define CHUNK_READ_WRITE 0
-#define CHUNK_READ_ONLY 1
-
-struct mem_chunk {
- unsigned long addr;
- unsigned long size;
- int type;
-};
-
-extern struct mem_chunk memory_chunk[];
extern int memory_end_set;
extern unsigned long memory_end;
+extern unsigned long max_physmem_end;
-void detect_memory_layout(struct mem_chunk chunk[], unsigned long maxsize);
-void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
- unsigned long size);
+extern void detect_memory_memblock(void);
/*
* Machine features detected in head.S
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index d7658c4b2ed5..a3b9150e6802 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -13,6 +13,7 @@
#include <linux/slab.h>
#include <linux/bootmem.h>
#include <linux/elf.h>
+#include <linux/memblock.h>
#include <asm/os_info.h>
#include <asm/elf.h>
#include <asm/ipl.h>
@@ -22,6 +23,24 @@
#define PTR_SUB(x, y) (((char *) (x)) - ((unsigned long) (y)))
#define PTR_DIFF(x, y) ((unsigned long)(((char *) (x)) - ((unsigned long) (y))))
+static struct memblock_region oldmem_region;
+
+static struct memblock_type oldmem_type = {
+ .cnt = 1,
+ .max = 1,
+ .total_size = 0,
+ .regions = &oldmem_region,
+};
+
+#define for_each_dump_mem_range(i, nid, p_start, p_end, p_nid) \
+ for (i = 0, __next_mem_range(&i, nid, &memblock.physmem, \
+ &oldmem_type, p_start, \
+ p_end, p_nid); \
+ i != (u64)ULLONG_MAX; \
+ __next_mem_range(&i, nid, &memblock.physmem, \
+ &oldmem_type, \
+ p_start, p_end, p_nid))
+
struct dump_save_areas dump_save_areas;
/*
@@ -264,19 +283,6 @@ static void *kzalloc_panic(int len)
}
/*
- * Get memory layout and create hole for oldmem
- */
-static struct mem_chunk *get_memory_layout(void)
-{
- struct mem_chunk *chunk_array;
-
- chunk_array = kzalloc_panic(MEMORY_CHUNKS * sizeof(struct mem_chunk));
- detect_memory_layout(chunk_array, 0);
- create_mem_hole(chunk_array, OLDMEM_BASE, OLDMEM_SIZE);
- return chunk_array;
-}
-
-/*
* Initialize ELF note
*/
static void *nt_init(void *buf, Elf64_Word type, void *desc, int d_len,
@@ -490,52 +496,33 @@ static int get_cpu_cnt(void)
*/
static int get_mem_chunk_cnt(void)
{
- struct mem_chunk *chunk_array, *mem_chunk;
- int i, cnt = 0;
+ int cnt = 0;
+ u64 idx;
- chunk_array = get_memory_layout();
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- mem_chunk = &chunk_array[i];
- if (chunk_array[i].type != CHUNK_READ_WRITE &&
- chunk_array[i].type != CHUNK_READ_ONLY)
- continue;
- if (mem_chunk->size == 0)
- continue;
+ for_each_dump_mem_range(idx, NUMA_NO_NODE, NULL, NULL, NULL)
cnt++;
- }
- kfree(chunk_array);
return cnt;
}
/*
* Initialize ELF loads (new kernel)
*/
-static int loads_init(Elf64_Phdr *phdr, u64 loads_offset)
+static void loads_init(Elf64_Phdr *phdr, u64 loads_offset)
{
- struct mem_chunk *chunk_array, *mem_chunk;
- int i;
+ phys_addr_t start, end;
+ u64 idx;
- chunk_array = get_memory_layout();
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- mem_chunk = &chunk_array[i];
- if (mem_chunk->size == 0)
- continue;
- if (chunk_array[i].type != CHUNK_READ_WRITE &&
- chunk_array[i].type != CHUNK_READ_ONLY)
- continue;
- else
- phdr->p_filesz = mem_chunk->size;
+ for_each_dump_mem_range(idx, NUMA_NO_NODE, &start, &end, NULL) {
+ phdr->p_filesz = end - start;
phdr->p_type = PT_LOAD;
- phdr->p_offset = mem_chunk->addr;
- phdr->p_vaddr = mem_chunk->addr;
- phdr->p_paddr = mem_chunk->addr;
- phdr->p_memsz = mem_chunk->size;
+ phdr->p_offset = start;
+ phdr->p_vaddr = start;
+ phdr->p_paddr = start;
+ phdr->p_memsz = end - start;
phdr->p_flags = PF_R | PF_W | PF_X;
phdr->p_align = PAGE_SIZE;
phdr++;
}
- kfree(chunk_array);
- return i;
}
/*
@@ -584,6 +571,14 @@ int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size)
/* If we cannot get HSA size for zfcpdump return error */
if (ipl_info.type == IPL_TYPE_FCP_DUMP && !sclp_get_hsa_size())
return -ENODEV;
+
+ /* For kdump, exclude previous crashkernel memory */
+ if (OLDMEM_BASE) {
+ oldmem_region.base = OLDMEM_BASE;
+ oldmem_region.size = OLDMEM_SIZE;
+ oldmem_type.total_size = OLDMEM_SIZE;
+ }
+
mem_chunk_cnt = get_mem_chunk_cnt();
alloc_size = 0x1000 + get_cpu_cnt() * 0x300 +
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index a734f3585ceb..0dff972a169c 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -258,13 +258,19 @@ static __init void setup_topology(void)
static void early_pgm_check_handler(void)
{
const struct exception_table_entry *fixup;
+ unsigned long cr0, cr0_new;
unsigned long addr;
addr = S390_lowcore.program_old_psw.addr;
fixup = search_exception_tables(addr & PSW_ADDR_INSN);
if (!fixup)
disabled_wait(0);
+ /* Disable low address protection before storing into lowcore. */
+ __ctl_store(cr0, 0, 0);
+ cr0_new = cr0 & ~(1UL << 28);
+ __ctl_load(cr0_new, 0, 0);
S390_lowcore.program_old_psw.addr = extable_fixup(fixup)|PSW_ADDR_AMODE;
+ __ctl_load(cr0, 0, 0);
}
static noinline __init void setup_lowcore_early(void)
diff --git a/arch/s390/kernel/head31.S b/arch/s390/kernel/head31.S
index 9a99856df1c9..6dbe80983a24 100644
--- a/arch/s390/kernel/head31.S
+++ b/arch/s390/kernel/head31.S
@@ -59,7 +59,6 @@ ENTRY(startup_continue)
.long 0 # cr13: home space segment table
.long 0xc0000000 # cr14: machine check handling off
.long 0 # cr15: linkage stack operations
-.Lmchunk:.long memory_chunk
.Lbss_bgn: .long __bss_start
.Lbss_end: .long _end
.Lparmaddr: .long PARMAREA
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 88d1ca81e2dd..1f5536c2fd02 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -78,10 +78,9 @@ EXPORT_SYMBOL(console_irq);
unsigned long elf_hwcap = 0;
char elf_platform[ELF_PLATFORM_SIZE];
-struct mem_chunk __initdata memory_chunk[MEMORY_CHUNKS];
-
int __initdata memory_end_set;
unsigned long __initdata memory_end;
+unsigned long __initdata max_physmem_end;
unsigned long VMALLOC_START;
EXPORT_SYMBOL(VMALLOC_START);
@@ -273,6 +272,7 @@ EXPORT_SYMBOL_GPL(pm_power_off);
static int __init early_parse_mem(char *p)
{
memory_end = memparse(p, &p);
+ memory_end &= PAGE_MASK;
memory_end_set = 1;
return 0;
}
@@ -401,7 +401,8 @@ static struct resource __initdata *standard_resources[] = {
static void __init setup_resources(void)
{
struct resource *res, *std_res, *sub_res;
- int i, j;
+ struct memblock_region *reg;
+ int j;
code_resource.start = (unsigned long) &_text;
code_resource.end = (unsigned long) &_etext - 1;
@@ -410,24 +411,13 @@ static void __init setup_resources(void)
bss_resource.start = (unsigned long) &__bss_start;
bss_resource.end = (unsigned long) &__bss_stop - 1;
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- if (!memory_chunk[i].size)
- continue;
+ for_each_memblock(memory, reg) {
res = alloc_bootmem_low(sizeof(*res));
res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
- switch (memory_chunk[i].type) {
- case CHUNK_READ_WRITE:
- res->name = "System RAM";
- break;
- case CHUNK_READ_ONLY:
- res->name = "System ROM";
- res->flags |= IORESOURCE_READONLY;
- break;
- default:
- res->name = "reserved";
- }
- res->start = memory_chunk[i].addr;
- res->end = res->start + memory_chunk[i].size - 1;
+
+ res->name = "System RAM";
+ res->start = reg->base;
+ res->end = reg->base + reg->size - 1;
request_resource(&iomem_resource, res);
for (j = 0; j < ARRAY_SIZE(standard_resources); j++) {
@@ -451,48 +441,11 @@ static void __init setup_resources(void)
static void __init setup_memory_end(void)
{
unsigned long vmax, vmalloc_size, tmp;
- unsigned long real_memory_size = 0;
- int i;
-
-
-#ifdef CONFIG_ZFCPDUMP
- if (ipl_info.type == IPL_TYPE_FCP_DUMP &&
- !OLDMEM_BASE && sclp_get_hsa_size()) {
- memory_end = sclp_get_hsa_size();
- memory_end_set = 1;
- }
-#endif
- memory_end &= PAGE_MASK;
-
- /*
- * Make sure all chunks are MAX_ORDER aligned so we don't need the
- * extra checks that HOLES_IN_ZONE would require.
- */
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- unsigned long start, end;
- struct mem_chunk *chunk;
- unsigned long align;
-
- chunk = &memory_chunk[i];
- if (!chunk->size)
- continue;
- align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1);
- start = (chunk->addr + align - 1) & ~(align - 1);
- end = (chunk->addr + chunk->size) & ~(align - 1);
- if (start >= end)
- memset(chunk, 0, sizeof(*chunk));
- else {
- chunk->addr = start;
- chunk->size = end - start;
- }
- real_memory_size = max(real_memory_size,
- chunk->addr + chunk->size);
- }
/* Choose kernel address space layout: 2, 3, or 4 levels. */
#ifdef CONFIG_64BIT
vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN;
- tmp = (memory_end ?: real_memory_size) / PAGE_SIZE;
+ tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE;
tmp = tmp * (sizeof(struct page) + PAGE_SIZE) + vmalloc_size;
if (tmp <= (1UL << 42))
vmax = 1UL << 42; /* 3-level kernel page table */
@@ -520,21 +473,11 @@ static void __init setup_memory_end(void)
vmemmap = (struct page *) tmp;
/* Take care that memory_end is set and <= vmemmap */
- memory_end = min(memory_end ?: real_memory_size, tmp);
-
- /* Fixup memory chunk array to fit into 0..memory_end */
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- struct mem_chunk *chunk = &memory_chunk[i];
+ memory_end = min(memory_end ?: max_physmem_end, tmp);
+ max_pfn = max_low_pfn = PFN_DOWN(memory_end);
+ memblock_remove(memory_end, ULONG_MAX);
- if (!chunk->size)
- continue;
- if (chunk->addr >= memory_end) {
- memset(chunk, 0, sizeof(*chunk));
- continue;
- }
- if (chunk->addr + chunk->size > memory_end)
- chunk->size = memory_end - chunk->addr;
- }
+ pr_notice("Max memory size: %luMB\n", memory_end >> 20);
}
static void __init setup_vmcoreinfo(void)
@@ -545,89 +488,6 @@ static void __init setup_vmcoreinfo(void)
#ifdef CONFIG_CRASH_DUMP
/*
- * Find suitable location for crashkernel memory
- */
-static unsigned long __init find_crash_base(unsigned long crash_size,
- char **msg)
-{
- unsigned long crash_base;
- struct mem_chunk *chunk;
- int i;
-
- if (memory_chunk[0].size < crash_size) {
- *msg = "first memory chunk must be at least crashkernel size";
- return 0;
- }
- if (OLDMEM_BASE && crash_size == OLDMEM_SIZE)
- return OLDMEM_BASE;
-
- for (i = MEMORY_CHUNKS - 1; i >= 0; i--) {
- chunk = &memory_chunk[i];
- if (chunk->size == 0)
- continue;
- if (chunk->type != CHUNK_READ_WRITE)
- continue;
- if (chunk->size < crash_size)
- continue;
- crash_base = (chunk->addr + chunk->size) - crash_size;
- if (crash_base < crash_size)
- continue;
- if (crash_base < sclp_get_hsa_size())
- continue;
- if (crash_base < (unsigned long) INITRD_START + INITRD_SIZE)
- continue;
- return crash_base;
- }
- *msg = "no suitable area found";
- return 0;
-}
-
-/*
- * Check if crash_base and crash_size is valid
- */
-static int __init verify_crash_base(unsigned long crash_base,
- unsigned long crash_size,
- char **msg)
-{
- struct mem_chunk *chunk;
- int i;
-
- /*
- * Because we do the swap to zero, we must have at least 'crash_size'
- * bytes free space before crash_base
- */
- if (crash_size > crash_base) {
- *msg = "crashkernel offset must be greater than size";
- return -EINVAL;
- }
-
- /* First memory chunk must be at least crash_size */
- if (memory_chunk[0].size < crash_size) {
- *msg = "first memory chunk must be at least crashkernel size";
- return -EINVAL;
- }
- /* Check if we fit into the respective memory chunk */
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- chunk = &memory_chunk[i];
- if (chunk->size == 0)
- continue;
- if (crash_base < chunk->addr)
- continue;
- if (crash_base >= chunk->addr + chunk->size)
- continue;
- /* we have found the memory chunk */
- if (crash_base + crash_size > chunk->addr + chunk->size) {
- *msg = "selected memory chunk is too small for "
- "crashkernel memory";
- return -EINVAL;
- }
- return 0;
- }
- *msg = "invalid memory range specified";
- return -EINVAL;
-}
-
-/*
* When kdump is enabled, we have to ensure that no memory from
* the area [0 - crashkernel memory size] and
* [crashk_res.start - crashk_res.end] is set offline.
@@ -653,23 +513,44 @@ static struct notifier_block kdump_mem_nb = {
#endif
/*
+ * Make sure that the area behind memory_end is protected
+ */
+static void reserve_memory_end(void)
+{
+#ifdef CONFIG_ZFCPDUMP
+ if (ipl_info.type == IPL_TYPE_FCP_DUMP &&
+ !OLDMEM_BASE && sclp_get_hsa_size()) {
+ memory_end = sclp_get_hsa_size();
+ memory_end &= PAGE_MASK;
+ memory_end_set = 1;
+ }
+#endif
+ if (!memory_end_set)
+ return;
+ memblock_reserve(memory_end, ULONG_MAX);
+}
+
+/*
* Make sure that oldmem, where the dump is stored, is protected
*/
static void reserve_oldmem(void)
{
#ifdef CONFIG_CRASH_DUMP
- unsigned long real_size = 0;
- int i;
-
- if (!OLDMEM_BASE)
- return;
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- struct mem_chunk *chunk = &memory_chunk[i];
+ if (OLDMEM_BASE)
+ /* Forget all memory above the running kdump system */
+ memblock_reserve(OLDMEM_SIZE, (phys_addr_t)ULONG_MAX);
+#endif
+}
- real_size = max(real_size, chunk->addr + chunk->size);
- }
- create_mem_hole(memory_chunk, OLDMEM_BASE, OLDMEM_SIZE);
- create_mem_hole(memory_chunk, OLDMEM_SIZE, real_size - OLDMEM_SIZE);
+/*
+ * Make sure that oldmem, where the dump is stored, is protected
+ */
+static void remove_oldmem(void)
+{
+#ifdef CONFIG_CRASH_DUMP
+ if (OLDMEM_BASE)
+ /* Forget all memory above the running kdump system */
+ memblock_remove(OLDMEM_SIZE, (phys_addr_t)ULONG_MAX);
#endif
}
@@ -680,167 +561,132 @@ static void __init reserve_crashkernel(void)
{
#ifdef CONFIG_CRASH_DUMP
unsigned long long crash_base, crash_size;
- char *msg = NULL;
+ phys_addr_t low, high;
int rc;
rc = parse_crashkernel(boot_command_line, memory_end, &crash_size,
&crash_base);
- if (rc || crash_size == 0)
- return;
+
crash_base = ALIGN(crash_base, KEXEC_CRASH_MEM_ALIGN);
crash_size = ALIGN(crash_size, KEXEC_CRASH_MEM_ALIGN);
- if (register_memory_notifier(&kdump_mem_nb))
+ if (rc || crash_size == 0)
return;
- if (!crash_base)
- crash_base = find_crash_base(crash_size, &msg);
- if (!crash_base) {
- pr_info("crashkernel reservation failed: %s\n", msg);
- unregister_memory_notifier(&kdump_mem_nb);
+
+ if (memblock.memory.regions[0].size < crash_size) {
+ pr_info("crashkernel reservation failed: %s\n",
+ "first memory chunk must be at least crashkernel size");
return;
}
- if (verify_crash_base(crash_base, crash_size, &msg)) {
- pr_info("crashkernel reservation failed: %s\n", msg);
- unregister_memory_notifier(&kdump_mem_nb);
+
+ low = crash_base ?: OLDMEM_BASE;
+ high = low + crash_size;
+ if (low >= OLDMEM_BASE && high <= OLDMEM_BASE + OLDMEM_SIZE) {
+ /* The crashkernel fits into OLDMEM, reuse OLDMEM */
+ crash_base = low;
+ } else {
+ /* Find suitable area in free memory */
+ low = max_t(unsigned long, crash_size, sclp_get_hsa_size());
+ high = crash_base ? crash_base + crash_size : ULONG_MAX;
+
+ if (crash_base && crash_base < low) {
+ pr_info("crashkernel reservation failed: %s\n",
+ "crash_base too low");
+ return;
+ }
+ low = crash_base ?: low;
+ crash_base = memblock_find_in_range(low, high, crash_size,
+ KEXEC_CRASH_MEM_ALIGN);
+ }
+
+ if (!crash_base) {
+ pr_info("crashkernel reservation failed: %s\n",
+ "no suitable area found");
return;
}
+
+ if (register_memory_notifier(&kdump_mem_nb))
+ return;
+
if (!OLDMEM_BASE && MACHINE_IS_VM)
diag10_range(PFN_DOWN(crash_base), PFN_DOWN(crash_size));
crashk_res.start = crash_base;
crashk_res.end = crash_base + crash_size - 1;
insert_resource(&iomem_resource, &crashk_res);
- create_mem_hole(memory_chunk, crash_base, crash_size);
+ memblock_remove(crash_base, crash_size);
pr_info("Reserving %lluMB of memory at %lluMB "
"for crashkernel (System RAM: %luMB)\n",
- crash_size >> 20, crash_base >> 20, memory_end >> 20);
+ crash_size >> 20, crash_base >> 20,
+ (unsigned long)memblock.memory.total_size >> 20);
os_info_crashkernel_add(crash_base, crash_size);
#endif
}
-static void __init setup_memory(void)
+/*
+ * Reserve the initrd from being used by memblock
+ */
+static void __init reserve_initrd(void)
{
- unsigned long bootmap_size;
- unsigned long start_pfn, end_pfn;
- int i;
+#ifdef CONFIG_BLK_DEV_INITRD
+ initrd_start = INITRD_START;
+ initrd_end = initrd_start + INITRD_SIZE;
+ memblock_reserve(INITRD_START, INITRD_SIZE);
+#endif
+}
- /*
- * partially used pages are not usable - thus
- * we are rounding upwards:
- */
+/*
+ * Check for initrd being in usable memory
+ */
+static void __init check_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (INITRD_START && INITRD_SIZE &&
+ !memblock_is_region_memory(INITRD_START, INITRD_SIZE)) {
+ pr_err("initrd does not fit memory.\n");
+ memblock_free(INITRD_START, INITRD_SIZE);
+ initrd_start = initrd_end = 0;
+ }
+#endif
+}
+
+/*
+ * Reserve all kernel text
+ */
+static void __init reserve_kernel(void)
+{
+ unsigned long start_pfn;
start_pfn = PFN_UP(__pa(&_end));
- end_pfn = max_pfn = PFN_DOWN(memory_end);
-#ifdef CONFIG_BLK_DEV_INITRD
/*
- * Move the initrd in case the bitmap of the bootmem allocater
- * would overwrite it.
+ * Reserve memory used for lowcore/command line/kernel image.
*/
+ memblock_reserve(0, (unsigned long)_ehead);
+ memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn)
+ - (unsigned long)_stext);
+}
- if (INITRD_START && INITRD_SIZE) {
- unsigned long bmap_size;
- unsigned long start;
-
- bmap_size = bootmem_bootmap_pages(end_pfn - start_pfn + 1);
- bmap_size = PFN_PHYS(bmap_size);
-
- if (PFN_PHYS(start_pfn) + bmap_size > INITRD_START) {
- start = PFN_PHYS(start_pfn) + bmap_size + PAGE_SIZE;
-
+static void __init reserve_elfcorehdr(void)
+{
#ifdef CONFIG_CRASH_DUMP
- if (OLDMEM_BASE) {
- /* Move initrd behind kdump oldmem */
- if (start + INITRD_SIZE > OLDMEM_BASE &&
- start < OLDMEM_BASE + OLDMEM_SIZE)
- start = OLDMEM_BASE + OLDMEM_SIZE;
- }
-#endif
- if (start + INITRD_SIZE > memory_end) {
- pr_err("initrd extends beyond end of "
- "memory (0x%08lx > 0x%08lx) "
- "disabling initrd\n",
- start + INITRD_SIZE, memory_end);
- INITRD_START = INITRD_SIZE = 0;
- } else {
- pr_info("Moving initrd (0x%08lx -> "
- "0x%08lx, size: %ld)\n",
- INITRD_START, start, INITRD_SIZE);
- memmove((void *) start, (void *) INITRD_START,
- INITRD_SIZE);
- INITRD_START = start;
- }
- }
- }
+ if (is_kdump_kernel())
+ memblock_reserve(elfcorehdr_addr - OLDMEM_BASE,
+ PAGE_ALIGN(elfcorehdr_size));
#endif
+}
- /*
- * Initialize the boot-time allocator
- */
- bootmap_size = init_bootmem(start_pfn, end_pfn);
+static void __init setup_memory(void)
+{
+ struct memblock_region *reg;
/*
- * Register RAM areas with the bootmem allocator.
+ * Init storage key for present memory
*/
-
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- unsigned long start_chunk, end_chunk, pfn;
-
- if (!memory_chunk[i].size)
- continue;
- start_chunk = PFN_DOWN(memory_chunk[i].addr);
- end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size);
- end_chunk = min(end_chunk, end_pfn);
- if (start_chunk >= end_chunk)
- continue;
- memblock_add_node(PFN_PHYS(start_chunk),
- PFN_PHYS(end_chunk - start_chunk), 0);
- pfn = max(start_chunk, start_pfn);
- storage_key_init_range(PFN_PHYS(pfn), PFN_PHYS(end_chunk));
+ for_each_memblock(memory, reg) {
+ storage_key_init_range(reg->base, reg->base + reg->size);
}
-
psw_set_key(PAGE_DEFAULT_KEY);
- free_bootmem_with_active_regions(0, max_pfn);
-
- /*
- * Reserve memory used for lowcore/command line/kernel image.
- */
- reserve_bootmem(0, (unsigned long)_ehead, BOOTMEM_DEFAULT);
- reserve_bootmem((unsigned long)_stext,
- PFN_PHYS(start_pfn) - (unsigned long)_stext,
- BOOTMEM_DEFAULT);
- /*
- * Reserve the bootmem bitmap itself as well. We do this in two
- * steps (first step was init_bootmem()) because this catches
- * the (very unlikely) case of us accidentally initializing the
- * bootmem allocator with an invalid RAM area.
- */
- reserve_bootmem(start_pfn << PAGE_SHIFT, bootmap_size,
- BOOTMEM_DEFAULT);
-
-#ifdef CONFIG_CRASH_DUMP
- if (crashk_res.start)
- reserve_bootmem(crashk_res.start,
- crashk_res.end - crashk_res.start + 1,
- BOOTMEM_DEFAULT);
- if (is_kdump_kernel())
- reserve_bootmem(elfcorehdr_addr - OLDMEM_BASE,
- PAGE_ALIGN(elfcorehdr_size), BOOTMEM_DEFAULT);
-#endif
-#ifdef CONFIG_BLK_DEV_INITRD
- if (INITRD_START && INITRD_SIZE) {
- if (INITRD_START + INITRD_SIZE <= memory_end) {
- reserve_bootmem(INITRD_START, INITRD_SIZE,
- BOOTMEM_DEFAULT);
- initrd_start = INITRD_START;
- initrd_end = initrd_start + INITRD_SIZE;
- } else {
- pr_err("initrd extends beyond end of "
- "memory (0x%08lx > 0x%08lx) "
- "disabling initrd\n",
- initrd_start + INITRD_SIZE, memory_end);
- initrd_start = initrd_end = 0;
- }
- }
-#endif
+ /* Only cosmetics */
+ memblock_enforce_memory_limit(memblock_end_of_DRAM());
}
/*
@@ -989,23 +835,46 @@ void __init setup_arch(char **cmdline_p)
ROOT_DEV = Root_RAM0;
+ /* Is init_mm really needed? */
init_mm.start_code = PAGE_OFFSET;
init_mm.end_code = (unsigned long) &_etext;
init_mm.end_data = (unsigned long) &_edata;
init_mm.brk = (unsigned long) &_end;
parse_early_param();
- detect_memory_layout(memory_chunk, memory_end);
os_info_init();
setup_ipl();
+
+ /* Do some memory reservations *before* memory is added to memblock */
+ reserve_memory_end();
reserve_oldmem();
+ reserve_kernel();
+ reserve_initrd();
+ reserve_elfcorehdr();
+ memblock_allow_resize();
+
+ /* Get information about *all* installed memory */
+ detect_memory_memblock();
+
+ remove_oldmem();
+
+ /*
+ * Make sure all chunks are MAX_ORDER aligned so we don't need the
+ * extra checks that HOLES_IN_ZONE would require.
+ *
+ * Is this still required?
+ */
+ memblock_trim_memory(1UL << (MAX_ORDER - 1 + PAGE_SHIFT));
+
setup_memory_end();
- reserve_crashkernel();
setup_memory();
+
+ check_initrd();
+ reserve_crashkernel();
+
setup_resources();
setup_vmcoreinfo();
setup_lowcore();
-
smp_fill_possible_mask();
cpu_init();
s390_init_cpu_topology();
diff --git a/arch/s390/kernel/topology.c b/arch/s390/kernel/topology.c
index 6298fed11ced..fa3b8cdaadac 100644
--- a/arch/s390/kernel/topology.c
+++ b/arch/s390/kernel/topology.c
@@ -333,7 +333,9 @@ static void __init alloc_masks(struct sysinfo_15_1_x *info,
nr_masks *= info->mag[TOPOLOGY_NR_MAG - offset - 1 - i];
nr_masks = max(nr_masks, 1);
for (i = 0; i < nr_masks; i++) {
- mask->next = alloc_bootmem(sizeof(struct mask_info));
+ mask->next = alloc_bootmem_align(
+ roundup_pow_of_two(sizeof(struct mask_info)),
+ roundup_pow_of_two(sizeof(struct mask_info)));
mask = mask->next;
}
}
diff --git a/arch/s390/mm/mem_detect.c b/arch/s390/mm/mem_detect.c
index cca388253a39..5535cfe0ee11 100644
--- a/arch/s390/mm/mem_detect.c
+++ b/arch/s390/mm/mem_detect.c
@@ -6,130 +6,60 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/memblock.h>
+#include <linux/init.h>
+#include <linux/debugfs.h>
+#include <linux/seq_file.h>
#include <asm/ipl.h>
#include <asm/sclp.h>
#include <asm/setup.h>
#define ADDR2G (1ULL << 31)
-static void find_memory_chunks(struct mem_chunk chunk[], unsigned long maxsize)
+#define CHUNK_READ_WRITE 0
+#define CHUNK_READ_ONLY 1
+
+static inline void memblock_physmem_add(phys_addr_t start, phys_addr_t size)
+{
+ memblock_add_range(&memblock.memory, start, size, 0, 0);
+ memblock_add_range(&memblock.physmem, start, size, 0, 0);
+}
+
+void __init detect_memory_memblock(void)
{
unsigned long long memsize, rnmax, rzm;
- unsigned long addr = 0, size;
- int i = 0, type;
+ unsigned long addr, size;
+ int type;
rzm = sclp_get_rzm();
rnmax = sclp_get_rnmax();
memsize = rzm * rnmax;
if (!rzm)
rzm = 1ULL << 17;
- if (sizeof(long) == 4) {
+ if (IS_ENABLED(CONFIG_32BIT)) {
rzm = min(ADDR2G, rzm);
- memsize = memsize ? min(ADDR2G, memsize) : ADDR2G;
+ memsize = min(ADDR2G, memsize);
}
- if (maxsize)
- memsize = memsize ? min((unsigned long)memsize, maxsize) : maxsize;
+ max_physmem_end = memsize;
+ addr = 0;
+ /* keep memblock lists close to the kernel */
+ memblock_set_bottom_up(true);
do {
size = 0;
type = tprot(addr);
do {
size += rzm;
- if (memsize && addr + size >= memsize)
+ if (max_physmem_end && addr + size >= max_physmem_end)
break;
} while (type == tprot(addr + size));
if (type == CHUNK_READ_WRITE || type == CHUNK_READ_ONLY) {
- if (memsize && (addr + size > memsize))
- size = memsize - addr;
- chunk[i].addr = addr;
- chunk[i].size = size;
- chunk[i].type = type;
- i++;
+ if (max_physmem_end && (addr + size > max_physmem_end))
+ size = max_physmem_end - addr;
+ memblock_physmem_add(addr, size);
}
addr += size;
- } while (addr < memsize && i < MEMORY_CHUNKS);
-}
-
-/**
- * detect_memory_layout - fill mem_chunk array with memory layout data
- * @chunk: mem_chunk array to be filled
- * @maxsize: maximum address where memory detection should stop
- *
- * Fills the passed in memory chunk array with the memory layout of the
- * machine. The array must have a size of at least MEMORY_CHUNKS and will
- * be fully initialized afterwards.
- * If the maxsize paramater has a value > 0 memory detection will stop at
- * that address. It is guaranteed that all chunks have an ending address
- * that is smaller than maxsize.
- * If maxsize is 0 all memory will be detected.
- */
-void detect_memory_layout(struct mem_chunk chunk[], unsigned long maxsize)
-{
- unsigned long flags, flags_dat, cr0;
-
- memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk));
- /*
- * Disable IRQs, DAT and low address protection so tprot does the
- * right thing and we don't get scheduled away with low address
- * protection disabled.
- */
- local_irq_save(flags);
- flags_dat = __arch_local_irq_stnsm(0xfb);
- /*
- * In case DAT was enabled, make sure chunk doesn't reside in vmalloc
- * space. We have disabled DAT and any access to vmalloc area will
- * cause an exception.
- * If DAT was disabled we are called from early ipl code.
- */
- if (test_bit(5, &flags_dat)) {
- if (WARN_ON_ONCE(is_vmalloc_or_module_addr(chunk)))
- goto out;
- }
- __ctl_store(cr0, 0, 0);
- __ctl_clear_bit(0, 28);
- find_memory_chunks(chunk, maxsize);
- __ctl_load(cr0, 0, 0);
-out:
- __arch_local_irq_ssm(flags_dat);
- local_irq_restore(flags);
-}
-EXPORT_SYMBOL(detect_memory_layout);
-
-/*
- * Create memory hole with given address and size.
- */
-void create_mem_hole(struct mem_chunk mem_chunk[], unsigned long addr,
- unsigned long size)
-{
- int i;
-
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- struct mem_chunk *chunk = &mem_chunk[i];
-
- if (chunk->size == 0)
- continue;
- if (addr > chunk->addr + chunk->size)
- continue;
- if (addr + size <= chunk->addr)
- continue;
- /* Split */
- if ((addr > chunk->addr) &&
- (addr + size < chunk->addr + chunk->size)) {
- struct mem_chunk *new = chunk + 1;
-
- memmove(new, chunk, (MEMORY_CHUNKS-i-1) * sizeof(*new));
- new->addr = addr + size;
- new->size = chunk->addr + chunk->size - new->addr;
- chunk->size = addr - chunk->addr;
- continue;
- } else if ((addr <= chunk->addr) &&
- (addr + size >= chunk->addr + chunk->size)) {
- memmove(chunk, chunk + 1, (MEMORY_CHUNKS-i-1) * sizeof(*chunk));
- memset(&mem_chunk[MEMORY_CHUNKS-1], 0, sizeof(*chunk));
- } else if (addr + size < chunk->addr + chunk->size) {
- chunk->size = chunk->addr + chunk->size - addr - size;
- chunk->addr = addr + size;
- } else if (addr > chunk->addr) {
- chunk->size = addr - chunk->addr;
- }
- }
+ } while (addr < max_physmem_end);
+ memblock_set_bottom_up(false);
+ if (!max_physmem_end)
+ max_physmem_end = memblock_end_of_DRAM();
}
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 72b04de18283..fe9012a49aa5 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -10,6 +10,7 @@
#include <linux/list.h>
#include <linux/hugetlb.h>
#include <linux/slab.h>
+#include <linux/memblock.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
#include <asm/setup.h>
@@ -66,7 +67,8 @@ static pte_t __ref *vmem_pte_alloc(unsigned long address)
if (slab_is_available())
pte = (pte_t *) page_table_alloc(&init_mm, address);
else
- pte = alloc_bootmem(PTRS_PER_PTE * sizeof(pte_t));
+ pte = alloc_bootmem_align(PTRS_PER_PTE * sizeof(pte_t),
+ PTRS_PER_PTE * sizeof(pte_t));
if (!pte)
return NULL;
clear_table((unsigned long *) pte, _PAGE_INVALID,
@@ -371,16 +373,14 @@ out:
void __init vmem_map_init(void)
{
unsigned long ro_start, ro_end;
- unsigned long start, end;
- int i;
+ struct memblock_region *reg;
+ phys_addr_t start, end;
ro_start = PFN_ALIGN((unsigned long)&_stext);
ro_end = (unsigned long)&_eshared & PAGE_MASK;
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- if (!memory_chunk[i].size)
- continue;
- start = memory_chunk[i].addr;
- end = memory_chunk[i].addr + memory_chunk[i].size;
+ for_each_memblock(memory, reg) {
+ start = reg->base;
+ end = reg->base + reg->size - 1;
if (start >= ro_end || end <= ro_start)
vmem_add_mem(start, end - start, 0);
else if (start >= ro_start && end <= ro_end)
@@ -400,23 +400,21 @@ void __init vmem_map_init(void)
}
/*
- * Convert memory chunk array to a memory segment list so there is a single
- * list that contains both r/w memory and shared memory segments.
+ * Convert memblock.memory to a memory segment list so there is a single
+ * list that contains all memory segments.
*/
static int __init vmem_convert_memory_chunk(void)
{
+ struct memblock_region *reg;
struct memory_segment *seg;
- int i;
mutex_lock(&vmem_mutex);
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- if (!memory_chunk[i].size)
- continue;
+ for_each_memblock(memory, reg) {
seg = kzalloc(sizeof(*seg), GFP_KERNEL);
if (!seg)
panic("Out of memory...\n");
- seg->start = memory_chunk[i].addr;
- seg->size = memory_chunk[i].size;
+ seg->start = reg->base;
+ seg->size = reg->size;
insert_memory_segment(seg);
}
mutex_unlock(&vmem_mutex);
diff --git a/drivers/s390/char/zcore.c b/drivers/s390/char/zcore.c
index 3d8e4d63f514..1884653e4472 100644
--- a/drivers/s390/char/zcore.c
+++ b/drivers/s390/char/zcore.c
@@ -17,6 +17,8 @@
#include <linux/miscdevice.h>
#include <linux/debugfs.h>
#include <linux/module.h>
+#include <linux/memblock.h>
+
#include <asm/asm-offsets.h>
#include <asm/ipl.h>
#include <asm/sclp.h>
@@ -411,33 +413,24 @@ static ssize_t zcore_memmap_read(struct file *filp, char __user *buf,
size_t count, loff_t *ppos)
{
return simple_read_from_buffer(buf, count, ppos, filp->private_data,
- MEMORY_CHUNKS * CHUNK_INFO_SIZE);
+ memblock.memory.cnt * CHUNK_INFO_SIZE);
}
static int zcore_memmap_open(struct inode *inode, struct file *filp)
{
- int i;
+ struct memblock_region *reg;
char *buf;
- struct mem_chunk *chunk_array;
+ int i = 0;
- chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
- GFP_KERNEL);
- if (!chunk_array)
- return -ENOMEM;
- detect_memory_layout(chunk_array, 0);
- buf = kzalloc(MEMORY_CHUNKS * CHUNK_INFO_SIZE, GFP_KERNEL);
+ buf = kzalloc(memblock.memory.cnt * CHUNK_INFO_SIZE, GFP_KERNEL);
if (!buf) {
- kfree(chunk_array);
return -ENOMEM;
}
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- sprintf(buf + (i * CHUNK_INFO_SIZE), "%016llx %016llx ",
- (unsigned long long) chunk_array[i].addr,
- (unsigned long long) chunk_array[i].size);
- if (chunk_array[i].size == 0)
- break;
+ for_each_memblock(memory, reg) {
+ sprintf(buf + (i++ * CHUNK_INFO_SIZE), "%016llx %016llx ",
+ (unsigned long long) reg->base,
+ (unsigned long long) reg->size);
}
- kfree(chunk_array);
filp->private_data = buf;
return nonseekable_open(inode, filp);
}
@@ -593,21 +586,12 @@ static int __init check_sdias(void)
static int __init get_mem_info(unsigned long *mem, unsigned long *end)
{
- int i;
- struct mem_chunk *chunk_array;
+ struct memblock_region *reg;
- chunk_array = kzalloc(MEMORY_CHUNKS * sizeof(struct mem_chunk),
- GFP_KERNEL);
- if (!chunk_array)
- return -ENOMEM;
- detect_memory_layout(chunk_array, 0);
- for (i = 0; i < MEMORY_CHUNKS; i++) {
- if (chunk_array[i].size == 0)
- break;
- *mem += chunk_array[i].size;
- *end = max(*end, chunk_array[i].addr + chunk_array[i].size);
+ for_each_memblock(memory, reg) {
+ *mem += reg->size;
+ *end = max_t(unsigned long, *end, reg->base + reg->size);
}
- kfree(chunk_array);
return 0;
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-18 06:24:29 +0000