#include <asm/uv/uv.h>
#include <asm/setup.h>
+#include "mm_internal.h"
+
+static void ident_pmd_init(unsigned long pmd_flag, pmd_t *pmd_page,
+ unsigned long addr, unsigned long end)
+{
+ addr &= PMD_MASK;
+ for (; addr < end; addr += PMD_SIZE) {
+ pmd_t *pmd = pmd_page + pmd_index(addr);
+
+ if (!pmd_present(*pmd))
+ set_pmd(pmd, __pmd(addr | pmd_flag));
+ }
+}
+static int ident_pud_init(struct x86_mapping_info *info, pud_t *pud_page,
+ unsigned long addr, unsigned long end)
+{
+ unsigned long next;
+
+ for (; addr < end; addr = next) {
+ pud_t *pud = pud_page + pud_index(addr);
+ pmd_t *pmd;
+
+ next = (addr & PUD_MASK) + PUD_SIZE;
+ if (next > end)
+ next = end;
+
+ if (pud_present(*pud)) {
+ pmd = pmd_offset(pud, 0);
+ ident_pmd_init(info->pmd_flag, pmd, addr, next);
+ continue;
+ }
+ pmd = (pmd_t *)info->alloc_pgt_page(info->context);
+ if (!pmd)
+ return -ENOMEM;
+ ident_pmd_init(info->pmd_flag, pmd, addr, next);
+ set_pud(pud, __pud(__pa(pmd) | _KERNPG_TABLE));
+ }
+
+ return 0;
+}
+
+int kernel_ident_mapping_init(struct x86_mapping_info *info, pgd_t *pgd_page,
+ unsigned long addr, unsigned long end)
+{
+ unsigned long next;
+ int result;
+ int off = info->kernel_mapping ? pgd_index(__PAGE_OFFSET) : 0;
+
+ for (; addr < end; addr = next) {
+ pgd_t *pgd = pgd_page + pgd_index(addr) + off;
+ pud_t *pud;
+
+ next = (addr & PGDIR_MASK) + PGDIR_SIZE;
+ if (next > end)
+ next = end;
+
+ if (pgd_present(*pgd)) {
+ pud = pud_offset(pgd, 0);
+ result = ident_pud_init(info, pud, addr, next);
+ if (result)
+ return result;
+ continue;
+ }
+
+ pud = (pud_t *)info->alloc_pgt_page(info->context);
+ if (!pud)
+ return -ENOMEM;
+ result = ident_pud_init(info, pud, addr, next);
+ if (result)
+ return result;
+ set_pgd(pgd, __pgd(__pa(pud) | _KERNPG_TABLE));
+ }
+
+ return 0;
+}
+
static int __init parse_direct_gbpages_off(char *arg)
{
direct_gbpages = 0;
void __init cleanup_highmap(void)
{
unsigned long vaddr = __START_KERNEL_map;
- unsigned long vaddr_end = __START_KERNEL_map + (max_pfn_mapped << PAGE_SHIFT);
+ unsigned long vaddr_end = __START_KERNEL_map + KERNEL_IMAGE_SIZE;
unsigned long end = roundup((unsigned long)_brk_end, PMD_SIZE) - 1;
pmd_t *pmd = level2_kernel_pgt;
+ /*
+ * Native path, max_pfn_mapped is not set yet.
+ * Xen has valid max_pfn_mapped set in
+ * arch/x86/xen/mmu.c:xen_setup_kernel_pagetable().
+ */
+ if (max_pfn_mapped)
+ vaddr_end = __START_KERNEL_map + (max_pfn_mapped << PAGE_SHIFT);
+
for (; vaddr + PMD_SIZE - 1 < vaddr_end; pmd++, vaddr += PMD_SIZE) {
if (pmd_none(*pmd))
continue;
}
}
-static __ref void *alloc_low_page(unsigned long *phys)
-{
- unsigned long pfn = pgt_buf_end++;
- void *adr;
-
- if (after_bootmem) {
- adr = (void *)get_zeroed_page(GFP_ATOMIC | __GFP_NOTRACK);
- *phys = __pa(adr);
-
- return adr;
- }
-
- if (pfn >= pgt_buf_top)
- panic("alloc_low_page: ran out of memory");
-
- adr = early_memremap(pfn * PAGE_SIZE, PAGE_SIZE);
- clear_page(adr);
- *phys = pfn * PAGE_SIZE;
- return adr;
-}
-
-static __ref void *map_low_page(void *virt)
-{
- void *adr;
- unsigned long phys, left;
-
- if (after_bootmem)
- return virt;
-
- phys = __pa(virt);
- left = phys & (PAGE_SIZE - 1);
- adr = early_memremap(phys & PAGE_MASK, PAGE_SIZE);
- adr = (void *)(((unsigned long)adr) | left);
-
- return adr;
-}
-
-static __ref void unmap_low_page(void *adr)
-{
- if (after_bootmem)
- return;
-
- early_iounmap((void *)((unsigned long)adr & PAGE_MASK), PAGE_SIZE);
-}
-
static unsigned long __meminit
phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
pgprot_t prot)
{
- unsigned pages = 0;
+ unsigned long pages = 0, next;
unsigned long last_map_addr = end;
int i;
pte_t *pte = pte_page + pte_index(addr);
- for(i = pte_index(addr); i < PTRS_PER_PTE; i++, addr += PAGE_SIZE, pte++) {
-
+ for (i = pte_index(addr); i < PTRS_PER_PTE; i++, addr = next, pte++) {
+ next = (addr & PAGE_MASK) + PAGE_SIZE;
if (addr >= end) {
- if (!after_bootmem) {
- for(; i < PTRS_PER_PTE; i++, pte++)
- set_pte(pte, __pte(0));
- }
- break;
+ if (!after_bootmem &&
+ !e820_any_mapped(addr & PAGE_MASK, next, E820_RAM) &&
+ !e820_any_mapped(addr & PAGE_MASK, next, E820_RESERVED_KERN))
+ set_pte(pte, __pte(0));
+ continue;
}
/*
int i = pmd_index(address);
for (; i < PTRS_PER_PMD; i++, address = next) {
- unsigned long pte_phys;
pmd_t *pmd = pmd_page + pmd_index(address);
pte_t *pte;
pgprot_t new_prot = prot;
+ next = (address & PMD_MASK) + PMD_SIZE;
if (address >= end) {
- if (!after_bootmem) {
- for (; i < PTRS_PER_PMD; i++, pmd++)
- set_pmd(pmd, __pmd(0));
- }
- break;
+ if (!after_bootmem &&
+ !e820_any_mapped(address & PMD_MASK, next, E820_RAM) &&
+ !e820_any_mapped(address & PMD_MASK, next, E820_RESERVED_KERN))
+ set_pmd(pmd, __pmd(0));
+ continue;
}
- next = (address & PMD_MASK) + PMD_SIZE;
-
if (pmd_val(*pmd)) {
if (!pmd_large(*pmd)) {
spin_lock(&init_mm.page_table_lock);
- pte = map_low_page((pte_t *)pmd_page_vaddr(*pmd));
+ pte = (pte_t *)pmd_page_vaddr(*pmd);
last_map_addr = phys_pte_init(pte, address,
end, prot);
- unmap_low_page(pte);
spin_unlock(&init_mm.page_table_lock);
continue;
}
pages++;
spin_lock(&init_mm.page_table_lock);
set_pte((pte_t *)pmd,
- pfn_pte(address >> PAGE_SHIFT,
+ pfn_pte((address & PMD_MASK) >> PAGE_SHIFT,
__pgprot(pgprot_val(prot) | _PAGE_PSE)));
spin_unlock(&init_mm.page_table_lock);
last_map_addr = next;
continue;
}
- pte = alloc_low_page(&pte_phys);
+ pte = alloc_low_page();
last_map_addr = phys_pte_init(pte, address, end, new_prot);
- unmap_low_page(pte);
spin_lock(&init_mm.page_table_lock);
- pmd_populate_kernel(&init_mm, pmd, __va(pte_phys));
+ pmd_populate_kernel(&init_mm, pmd, pte);
spin_unlock(&init_mm.page_table_lock);
}
update_page_count(PG_LEVEL_2M, pages);
int i = pud_index(addr);
for (; i < PTRS_PER_PUD; i++, addr = next) {
- unsigned long pmd_phys;
pud_t *pud = pud_page + pud_index(addr);
pmd_t *pmd;
pgprot_t prot = PAGE_KERNEL;
- if (addr >= end)
- break;
-
next = (addr & PUD_MASK) + PUD_SIZE;
-
- if (!after_bootmem && !e820_any_mapped(addr, next, 0)) {
- set_pud(pud, __pud(0));
+ if (addr >= end) {
+ if (!after_bootmem &&
+ !e820_any_mapped(addr & PUD_MASK, next, E820_RAM) &&
+ !e820_any_mapped(addr & PUD_MASK, next, E820_RESERVED_KERN))
+ set_pud(pud, __pud(0));
continue;
}
if (pud_val(*pud)) {
if (!pud_large(*pud)) {
- pmd = map_low_page(pmd_offset(pud, 0));
+ pmd = pmd_offset(pud, 0);
last_map_addr = phys_pmd_init(pmd, addr, end,
page_size_mask, prot);
- unmap_low_page(pmd);
__flush_tlb_all();
continue;
}
pages++;
spin_lock(&init_mm.page_table_lock);
set_pte((pte_t *)pud,
- pfn_pte(addr >> PAGE_SHIFT, PAGE_KERNEL_LARGE));
+ pfn_pte((addr & PUD_MASK) >> PAGE_SHIFT,
+ PAGE_KERNEL_LARGE));
spin_unlock(&init_mm.page_table_lock);
last_map_addr = next;
continue;
}
- pmd = alloc_low_page(&pmd_phys);
+ pmd = alloc_low_page();
last_map_addr = phys_pmd_init(pmd, addr, end, page_size_mask,
prot);
- unmap_low_page(pmd);
spin_lock(&init_mm.page_table_lock);
- pud_populate(&init_mm, pud, __va(pmd_phys));
+ pud_populate(&init_mm, pud, pmd);
spin_unlock(&init_mm.page_table_lock);
}
__flush_tlb_all();
for (; start < end; start = next) {
pgd_t *pgd = pgd_offset_k(start);
- unsigned long pud_phys;
pud_t *pud;
- next = (start + PGDIR_SIZE) & PGDIR_MASK;
- if (next > end)
- next = end;
+ next = (start & PGDIR_MASK) + PGDIR_SIZE;
if (pgd_val(*pgd)) {
- pud = map_low_page((pud_t *)pgd_page_vaddr(*pgd));
+ pud = (pud_t *)pgd_page_vaddr(*pgd);
last_map_addr = phys_pud_init(pud, __pa(start),
__pa(end), page_size_mask);
- unmap_low_page(pud);
continue;
}
- pud = alloc_low_page(&pud_phys);
- last_map_addr = phys_pud_init(pud, __pa(start), __pa(next),
+ pud = alloc_low_page();
+ last_map_addr = phys_pud_init(pud, __pa(start), __pa(end),
page_size_mask);
- unmap_low_page(pud);
spin_lock(&init_mm.page_table_lock);
- pgd_populate(&init_mm, pgd, __va(pud_phys));
+ pgd_populate(&init_mm, pgd, pud);
spin_unlock(&init_mm.page_table_lock);
pgd_changed = true;
}
if (pgd_changed)
- sync_global_pgds(addr, end);
+ sync_global_pgds(addr, end - 1);
__flush_tlb_all();
{
struct pglist_data *pgdat = NODE_DATA(nid);
struct zone *zone = pgdat->node_zones + ZONE_NORMAL;
- unsigned long last_mapped_pfn, start_pfn = start >> PAGE_SHIFT;
+ unsigned long start_pfn = start >> PAGE_SHIFT;
unsigned long nr_pages = size >> PAGE_SHIFT;
int ret;
- last_mapped_pfn = init_memory_mapping(start, start + size);
- if (last_mapped_pfn > max_pfn_mapped)
- max_pfn_mapped = last_mapped_pfn;
+ init_memory_mapping(start, start + size);
ret = __add_pages(nid, zone, start_pfn, nr_pages);
WARN_ON_ONCE(ret);
}
EXPORT_SYMBOL_GPL(arch_add_memory);
+#define PAGE_INUSE 0xFD
+
+static void __meminit free_pagetable(struct page *page, int order)
+{
+ struct zone *zone;
+ bool bootmem = false;
+ unsigned long magic;
+ unsigned int nr_pages = 1 << order;
+
+ /* bootmem page has reserved flag */
+ if (PageReserved(page)) {
+ __ClearPageReserved(page);
+ bootmem = true;
+
+ magic = (unsigned long)page->lru.next;
+ if (magic == SECTION_INFO || magic == MIX_SECTION_INFO) {
+ while (nr_pages--)
+ put_page_bootmem(page++);
+ } else
+ __free_pages_bootmem(page, order);
+ } else
+ free_pages((unsigned long)page_address(page), order);
+
+ /*
+ * SECTION_INFO pages and MIX_SECTION_INFO pages
+ * are all allocated by bootmem.
+ */
+ if (bootmem) {
+ zone = page_zone(page);
+ zone_span_writelock(zone);
+ zone->present_pages += nr_pages;
+ zone_span_writeunlock(zone);
+ totalram_pages += nr_pages;
+ }
+}
+
+static void __meminit free_pte_table(pte_t *pte_start, pmd_t *pmd)
+{
+ pte_t *pte;
+ int i;
+
+ for (i = 0; i < PTRS_PER_PTE; i++) {
+ pte = pte_start + i;
+ if (pte_val(*pte))
+ return;
+ }
+
+ /* free a pte talbe */
+ free_pagetable(pmd_page(*pmd), 0);
+ spin_lock(&init_mm.page_table_lock);
+ pmd_clear(pmd);
+ spin_unlock(&init_mm.page_table_lock);
+}
+
+static void __meminit free_pmd_table(pmd_t *pmd_start, pud_t *pud)
+{
+ pmd_t *pmd;
+ int i;
+
+ for (i = 0; i < PTRS_PER_PMD; i++) {
+ pmd = pmd_start + i;
+ if (pmd_val(*pmd))
+ return;
+ }
+
+ /* free a pmd talbe */
+ free_pagetable(pud_page(*pud), 0);
+ spin_lock(&init_mm.page_table_lock);
+ pud_clear(pud);
+ spin_unlock(&init_mm.page_table_lock);
+}
+
+/* Return true if pgd is changed, otherwise return false. */
+static bool __meminit free_pud_table(pud_t *pud_start, pgd_t *pgd)
+{
+ pud_t *pud;
+ int i;
+
+ for (i = 0; i < PTRS_PER_PUD; i++) {
+ pud = pud_start + i;
+ if (pud_val(*pud))
+ return false;
+ }
+
+ /* free a pud table */
+ free_pagetable(pgd_page(*pgd), 0);
+ spin_lock(&init_mm.page_table_lock);
+ pgd_clear(pgd);
+ spin_unlock(&init_mm.page_table_lock);
+
+ return true;
+}
+
+static void __meminit
+remove_pte_table(pte_t *pte_start, unsigned long addr, unsigned long end,
+ bool direct)
+{
+ unsigned long next, pages = 0;
+ pte_t *pte;
+ void *page_addr;
+ phys_addr_t phys_addr;
+
+ pte = pte_start + pte_index(addr);
+ for (; addr < end; addr = next, pte++) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ if (next > end)
+ next = end;
+
+ if (!pte_present(*pte))
+ continue;
+
+ /*
+ * We mapped [0,1G) memory as identity mapping when
+ * initializing, in arch/x86/kernel/head_64.S. These
+ * pagetables cannot be removed.
+ */
+ phys_addr = pte_val(*pte) + (addr & PAGE_MASK);
+ if (phys_addr < (phys_addr_t)0x40000000)
+ return;
+
+ if (IS_ALIGNED(addr, PAGE_SIZE) &&
+ IS_ALIGNED(next, PAGE_SIZE)) {
+ /*
+ * Do not free direct mapping pages since they were
+ * freed when offlining, or simplely not in use.
+ */
+ if (!direct)
+ free_pagetable(pte_page(*pte), 0);
+
+ spin_lock(&init_mm.page_table_lock);
+ pte_clear(&init_mm, addr, pte);
+ spin_unlock(&init_mm.page_table_lock);
+
+ /* For non-direct mapping, pages means nothing. */
+ pages++;
+ } else {
+ /*
+ * If we are here, we are freeing vmemmap pages since
+ * direct mapped memory ranges to be freed are aligned.
+ *
+ * If we are not removing the whole page, it means
+ * other page structs in this page are being used and
+ * we canot remove them. So fill the unused page_structs
+ * with 0xFD, and remove the page when it is wholly
+ * filled with 0xFD.
+ */
+ memset((void *)addr, PAGE_INUSE, next - addr);
+
+ page_addr = page_address(pte_page(*pte));
+ if (!memchr_inv(page_addr, PAGE_INUSE, PAGE_SIZE)) {
+ free_pagetable(pte_page(*pte), 0);
+
+ spin_lock(&init_mm.page_table_lock);
+ pte_clear(&init_mm, addr, pte);
+ spin_unlock(&init_mm.page_table_lock);
+ }
+ }
+ }
+
+ /* Call free_pte_table() in remove_pmd_table(). */
+ flush_tlb_all();
+ if (direct)
+ update_page_count(PG_LEVEL_4K, -pages);
+}
+
+static void __meminit
+remove_pmd_table(pmd_t *pmd_start, unsigned long addr, unsigned long end,
+ bool direct)
+{
+ unsigned long next, pages = 0;
+ pte_t *pte_base;
+ pmd_t *pmd;
+ void *page_addr;
+
+ pmd = pmd_start + pmd_index(addr);
+ for (; addr < end; addr = next, pmd++) {
+ next = pmd_addr_end(addr, end);
+
+ if (!pmd_present(*pmd))
+ continue;
+
+ if (pmd_large(*pmd)) {
+ if (IS_ALIGNED(addr, PMD_SIZE) &&
+ IS_ALIGNED(next, PMD_SIZE)) {
+ if (!direct)
+ free_pagetable(pmd_page(*pmd),
+ get_order(PMD_SIZE));
+
+ spin_lock(&init_mm.page_table_lock);
+ pmd_clear(pmd);
+ spin_unlock(&init_mm.page_table_lock);
+ pages++;
+ } else {
+ /* If here, we are freeing vmemmap pages. */
+ memset((void *)addr, PAGE_INUSE, next - addr);
+
+ page_addr = page_address(pmd_page(*pmd));
+ if (!memchr_inv(page_addr, PAGE_INUSE,
+ PMD_SIZE)) {
+ free_pagetable(pmd_page(*pmd),
+ get_order(PMD_SIZE));
+
+ spin_lock(&init_mm.page_table_lock);
+ pmd_clear(pmd);
+ spin_unlock(&init_mm.page_table_lock);
+ }
+ }
+
+ continue;
+ }
+
+ pte_base = (pte_t *)pmd_page_vaddr(*pmd);
+ remove_pte_table(pte_base, addr, next, direct);
+ free_pte_table(pte_base, pmd);
+ }
+
+ /* Call free_pmd_table() in remove_pud_table(). */
+ if (direct)
+ update_page_count(PG_LEVEL_2M, -pages);
+}
+
+static void __meminit
+remove_pud_table(pud_t *pud_start, unsigned long addr, unsigned long end,
+ bool direct)
+{
+ unsigned long next, pages = 0;
+ pmd_t *pmd_base;
+ pud_t *pud;
+ void *page_addr;
+
+ pud = pud_start + pud_index(addr);
+ for (; addr < end; addr = next, pud++) {
+ next = pud_addr_end(addr, end);
+
+ if (!pud_present(*pud))
+ continue;
+
+ if (pud_large(*pud)) {
+ if (IS_ALIGNED(addr, PUD_SIZE) &&
+ IS_ALIGNED(next, PUD_SIZE)) {
+ if (!direct)
+ free_pagetable(pud_page(*pud),
+ get_order(PUD_SIZE));
+
+ spin_lock(&init_mm.page_table_lock);
+ pud_clear(pud);
+ spin_unlock(&init_mm.page_table_lock);
+ pages++;
+ } else {
+ /* If here, we are freeing vmemmap pages. */
+ memset((void *)addr, PAGE_INUSE, next - addr);
+
+ page_addr = page_address(pud_page(*pud));
+ if (!memchr_inv(page_addr, PAGE_INUSE,
+ PUD_SIZE)) {
+ free_pagetable(pud_page(*pud),
+ get_order(PUD_SIZE));
+
+ spin_lock(&init_mm.page_table_lock);
+ pud_clear(pud);
+ spin_unlock(&init_mm.page_table_lock);
+ }
+ }
+
+ continue;
+ }
+
+ pmd_base = (pmd_t *)pud_page_vaddr(*pud);
+ remove_pmd_table(pmd_base, addr, next, direct);
+ free_pmd_table(pmd_base, pud);
+ }
+
+ if (direct)
+ update_page_count(PG_LEVEL_1G, -pages);
+}
+
+/* start and end are both virtual address. */
+static void __meminit
+remove_pagetable(unsigned long start, unsigned long end, bool direct)
+{
+ unsigned long next;
+ pgd_t *pgd;
+ pud_t *pud;
+ bool pgd_changed = false;
+
+ for (; start < end; start = next) {
+ next = pgd_addr_end(start, end);
+
+ pgd = pgd_offset_k(start);
+ if (!pgd_present(*pgd))
+ continue;
+
+ pud = (pud_t *)pgd_page_vaddr(*pgd);
+ remove_pud_table(pud, start, next, direct);
+ if (free_pud_table(pud, pgd))
+ pgd_changed = true;
+ }
+
+ if (pgd_changed)
+ sync_global_pgds(start, end - 1);
+
+ flush_tlb_all();
+}
+
+void __ref vmemmap_free(struct page *memmap, unsigned long nr_pages)
+{
+ unsigned long start = (unsigned long)memmap;
+ unsigned long end = (unsigned long)(memmap + nr_pages);
+
+ remove_pagetable(start, end, false);
+}
+
+static void __meminit
+kernel_physical_mapping_remove(unsigned long start, unsigned long end)
+{
+ start = (unsigned long)__va(start);
+ end = (unsigned long)__va(end);
+
+ remove_pagetable(start, end, true);
+}
+
+#ifdef CONFIG_MEMORY_HOTREMOVE
+int __ref arch_remove_memory(u64 start, u64 size)
+{
+ unsigned long start_pfn = start >> PAGE_SHIFT;
+ unsigned long nr_pages = size >> PAGE_SHIFT;
+ struct zone *zone;
+ int ret;
+
+ zone = page_zone(pfn_to_page(start_pfn));
+ kernel_physical_mapping_remove(start, start + size);
+ ret = __remove_pages(zone, start_pfn, nr_pages);
+ WARN_ON_ONCE(ret);
+
+ return ret;
+}
+#endif
#endif /* CONFIG_MEMORY_HOTPLUG */
static struct kcore_list kcore_vsyscall;
+static void __init register_page_bootmem_info(void)
+{
+#ifdef CONFIG_NUMA
+ int i;
+
+ for_each_online_node(i)
+ register_page_bootmem_info_node(NODE_DATA(i));
+#endif
+}
+
void __init mem_init(void)
{
long codesize, reservedpages, datasize, initsize;
reservedpages = 0;
/* this will put all low memory onto the freelists */
-#ifdef CONFIG_NUMA
- totalram_pages = numa_free_all_bootmem();
-#else
+ register_page_bootmem_info();
totalram_pages = free_all_bootmem();
-#endif
absent_pages = absent_pages_in_range(0, max_pfn);
reservedpages = max_pfn - totalram_pages - absent_pages;
void mark_rodata_ro(void)
{
unsigned long start = PFN_ALIGN(_text);
- unsigned long rodata_start =
- ((unsigned long)__start_rodata + PAGE_SIZE - 1) & PAGE_MASK;
+ unsigned long rodata_start = PFN_ALIGN(__start_rodata);
unsigned long end = (unsigned long) &__end_rodata_hpage_align;
- unsigned long text_end = PAGE_ALIGN((unsigned long) &__stop___ex_table);
- unsigned long rodata_end = PAGE_ALIGN((unsigned long) &__end_rodata);
- unsigned long data_start = (unsigned long) &_sdata;
+ unsigned long text_end = PFN_ALIGN(&__stop___ex_table);
+ unsigned long rodata_end = PFN_ALIGN(&__end_rodata);
+ unsigned long all_end = PFN_ALIGN(&_end);
printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n",
(end - start) >> 10);
kernel_set_to_readonly = 1;
/*
- * The rodata section (but not the kernel text!) should also be
- * not-executable.
+ * The rodata/data/bss/brk section (but not the kernel text!)
+ * should also be not-executable.
*/
- set_memory_nx(rodata_start, (end - rodata_start) >> PAGE_SHIFT);
+ set_memory_nx(rodata_start, (all_end - rodata_start) >> PAGE_SHIFT);
rodata_test();
#endif
free_init_pages("unused kernel memory",
- (unsigned long) page_address(virt_to_page(text_end)),
- (unsigned long)
- page_address(virt_to_page(rodata_start)));
+ (unsigned long) __va(__pa_symbol(text_end)),
+ (unsigned long) __va(__pa_symbol(rodata_start)));
+
free_init_pages("unused kernel memory",
- (unsigned long) page_address(virt_to_page(rodata_end)),
- (unsigned long) page_address(virt_to_page(data_start)));
+ (unsigned long) __va(__pa_symbol(rodata_end)),
+ (unsigned long) __va(__pa_symbol(_sdata)));
}
#endif
}
}
- sync_global_pgds((unsigned long)start_page, end);
+ sync_global_pgds((unsigned long)start_page, end - 1);
return 0;
}
+#if defined(CONFIG_MEMORY_HOTPLUG_SPARSE) && defined(CONFIG_HAVE_BOOTMEM_INFO_NODE)
+void register_page_bootmem_memmap(unsigned long section_nr,
+ struct page *start_page, unsigned long size)
+{
+ unsigned long addr = (unsigned long)start_page;
+ unsigned long end = (unsigned long)(start_page + size);
+ unsigned long next;
+ pgd_t *pgd;
+ pud_t *pud;
+ pmd_t *pmd;
+ unsigned int nr_pages;
+ struct page *page;
+
+ for (; addr < end; addr = next) {
+ pte_t *pte = NULL;
+
+ pgd = pgd_offset_k(addr);
+ if (pgd_none(*pgd)) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ continue;
+ }
+ get_page_bootmem(section_nr, pgd_page(*pgd), MIX_SECTION_INFO);
+
+ pud = pud_offset(pgd, addr);
+ if (pud_none(*pud)) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ continue;
+ }
+ get_page_bootmem(section_nr, pud_page(*pud), MIX_SECTION_INFO);
+
+ if (!cpu_has_pse) {
+ next = (addr + PAGE_SIZE) & PAGE_MASK;
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd))
+ continue;
+ get_page_bootmem(section_nr, pmd_page(*pmd),
+ MIX_SECTION_INFO);
+
+ pte = pte_offset_kernel(pmd, addr);
+ if (pte_none(*pte))
+ continue;
+ get_page_bootmem(section_nr, pte_page(*pte),
+ SECTION_INFO);
+ } else {
+ next = pmd_addr_end(addr, end);
+
+ pmd = pmd_offset(pud, addr);
+ if (pmd_none(*pmd))
+ continue;
+
+ nr_pages = 1 << (get_order(PMD_SIZE));
+ page = pmd_page(*pmd);
+ while (nr_pages--)
+ get_page_bootmem(section_nr, page++,
+ SECTION_INFO);
+ }
+ }
+}
+#endif
+
void __meminit vmemmap_populate_print_last(void)
{
if (p_start) {
projects / platform / adaptation / renesas_rcar / renesas_kernel.git / blobdiff