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-rw-r--r--arch/s390/Kconfig8
-rw-r--r--arch/s390/mm/extmem.c8
-rw-r--r--arch/s390/mm/init.c2
-rw-r--r--arch/s390/mm/vmem.c81
4 files changed, 20 insertions, 79 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8f5f02160ff..29a7940f284 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -300,6 +300,14 @@ comment "Kernel preemption"
source "kernel/Kconfig.preempt"
+config ARCH_SPARSEMEM_ENABLE
+ def_bool y
+ select SPARSEMEM_VMEMMAP_ENABLE
+ select SPARSEMEM_VMEMMAP
+
+config ARCH_SPARSEMEM_DEFAULT
+ def_bool y
+
source "mm/Kconfig"
comment "I/O subsystem configuration"
diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index ed2af0a3303..f231f5ec74b 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -287,7 +287,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
if (rc < 0)
goto out_free;
- rc = add_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+ rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
if (rc)
goto out_free;
@@ -351,7 +351,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
release_resource(seg->res);
kfree(seg->res);
out_shared:
- remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+ vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
out_free:
kfree(seg);
out:
@@ -474,7 +474,7 @@ segment_modify_shared (char *name, int do_nonshared)
rc = 0;
goto out_unlock;
out_del:
- remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+ vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
list_del(&seg->list);
dcss_diag(DCSS_PURGESEG, seg->dcss_name, &dummy, &dummy);
kfree(seg);
@@ -508,7 +508,7 @@ segment_unload(char *name)
goto out_unlock;
release_resource(seg->res);
kfree(seg->res);
- remove_shared_memory(seg->start_addr, seg->end - seg->start_addr + 1);
+ vmem_remove_mapping(seg->start_addr, seg->end - seg->start_addr + 1);
list_del(&seg->list);
dcss_diag(DCSS_PURGESEG, seg->dcss_name, &dummy, &dummy);
kfree(seg);
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index acc92f46a09..fa31de6ae97 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -106,6 +106,8 @@ void __init paging_init(void)
__ctl_load(S390_lowcore.kernel_asce, 13, 13);
__raw_local_irq_ssm(ssm_mask);
+ sparse_memory_present_with_active_regions(MAX_NUMNODES);
+ sparse_init();
memset(max_zone_pfns, 0, sizeof(max_zone_pfns));
#ifdef CONFIG_ZONE_DMA
max_zone_pfns[ZONE_DMA] = PFN_DOWN(MAX_DMA_ADDRESS);
diff --git a/arch/s390/mm/vmem.c b/arch/s390/mm/vmem.c
index 97bce6c9757..beccacf907f 100644
--- a/arch/s390/mm/vmem.c
+++ b/arch/s390/mm/vmem.c
@@ -27,43 +27,6 @@ struct memory_segment {
static LIST_HEAD(mem_segs);
-void __meminit memmap_init(unsigned long size, int nid, unsigned long zone,
- unsigned long start_pfn)
-{
- struct page *start, *end;
- struct page *map_start, *map_end;
- int i;
-
- start = pfn_to_page(start_pfn);
- end = start + size;
-
- for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
- unsigned long cstart, cend;
-
- cstart = PFN_DOWN(memory_chunk[i].addr);
- cend = cstart + PFN_DOWN(memory_chunk[i].size);
-
- map_start = mem_map + cstart;
- map_end = mem_map + cend;
-
- if (map_start < start)
- map_start = start;
- if (map_end > end)
- map_end = end;
-
- map_start -= ((unsigned long) map_start & (PAGE_SIZE - 1))
- / sizeof(struct page);
- map_end += ((PFN_ALIGN((unsigned long) map_end)
- - (unsigned long) map_end)
- / sizeof(struct page));
-
- if (map_start < map_end)
- memmap_init_zone((unsigned long)(map_end - map_start),
- nid, zone, page_to_pfn(map_start),
- MEMMAP_EARLY);
- }
-}
-
static void __ref *vmem_alloc_pages(unsigned int order)
{
if (slab_is_available())
@@ -115,7 +78,7 @@ static pte_t __init_refok *vmem_pte_alloc(void)
/*
* Add a physical memory range to the 1:1 mapping.
*/
-static int vmem_add_range(unsigned long start, unsigned long size, int ro)
+static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
{
unsigned long address;
pgd_t *pg_dir;
@@ -209,10 +172,9 @@ static void vmem_remove_range(unsigned long start, unsigned long size)
/*
* Add a backed mem_map array to the virtual mem_map array.
*/
-static int vmem_add_mem_map(unsigned long start, unsigned long size)
+int __meminit vmemmap_populate(struct page *start, unsigned long nr, int node)
{
unsigned long address, start_addr, end_addr;
- struct page *map_start, *map_end;
pgd_t *pg_dir;
pud_t *pu_dir;
pmd_t *pm_dir;
@@ -220,11 +182,8 @@ static int vmem_add_mem_map(unsigned long start, unsigned long size)
pte_t pte;
int ret = -ENOMEM;
- map_start = VMEM_MAP + PFN_DOWN(start);
- map_end = VMEM_MAP + PFN_DOWN(start + size);
-
- start_addr = (unsigned long) map_start & PAGE_MASK;
- end_addr = PFN_ALIGN((unsigned long) map_end);
+ start_addr = (unsigned long) start;
+ end_addr = (unsigned long) (start + nr);
for (address = start_addr; address < end_addr; address += PAGE_SIZE) {
pg_dir = pgd_offset_k(address);
@@ -268,16 +227,6 @@ out:
return ret;
}
-static int vmem_add_mem(unsigned long start, unsigned long size, int ro)
-{
- int ret;
-
- ret = vmem_add_mem_map(start, size);
- if (ret)
- return ret;
- return vmem_add_range(start, size, ro);
-}
-
/*
* Add memory segment to the segment list if it doesn't overlap with
* an already present segment.
@@ -315,7 +264,7 @@ static void __remove_shared_memory(struct memory_segment *seg)
vmem_remove_range(seg->start, seg->size);
}
-int remove_shared_memory(unsigned long start, unsigned long size)
+int vmem_remove_mapping(unsigned long start, unsigned long size)
{
struct memory_segment *seg;
int ret;
@@ -339,11 +288,9 @@ out:
return ret;
}
-int add_shared_memory(unsigned long start, unsigned long size)
+int vmem_add_mapping(unsigned long start, unsigned long size)
{
struct memory_segment *seg;
- struct page *page;
- unsigned long pfn, num_pfn, end_pfn;
int ret;
mutex_lock(&vmem_mutex);
@@ -361,21 +308,6 @@ int add_shared_memory(unsigned long start, unsigned long size)
ret = vmem_add_mem(start, size, 0);
if (ret)
goto out_remove;
-
- pfn = PFN_DOWN(start);
- num_pfn = PFN_DOWN(size);
- end_pfn = pfn + num_pfn;
-
- page = pfn_to_page(pfn);
- memset(page, 0, num_pfn * sizeof(struct page));
-
- for (; pfn < end_pfn; pfn++) {
- page = pfn_to_page(pfn);
- init_page_count(page);
- reset_page_mapcount(page);
- SetPageReserved(page);
- INIT_LIST_HEAD(&page->lru);
- }
goto out;
out_remove:
@@ -401,7 +333,6 @@ void __init vmem_map_init(void)
INIT_LIST_HEAD(&init_mm.context.crst_list);
INIT_LIST_HEAD(&init_mm.context.pgtable_list);
init_mm.context.noexec = 0;
- NODE_DATA(0)->node_mem_map = VMEM_MAP;
ro_start = ((unsigned long)&_stext) & PAGE_MASK;
ro_end = PFN_ALIGN((unsigned long)&_eshared);
for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-21 16:01:51 +0000