X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fmm%2Finit.c;h=c4b8e468df78997af071984f2172ad433ab99dbb;hb=97bf2856c6014879bd04983a3e9dfcdac1e7fe85;hp=1d61913d75f4b8778e16879207bf5c6513f43cf7;hpb=43bc926fffd92024b46cafaf7350d669ba9ca884;p=linux-2.6.git diff --git a/arch/x86_64/mm/init.c b/arch/x86_64/mm/init.c index 1d61913d7..c4b8e468d 100644 --- a/arch/x86_64/mm/init.c +++ b/arch/x86_64/mm/init.c @@ -6,7 +6,6 @@ * Copyright (C) 2002,2003 Andi Kleen */ -#include #include #include #include @@ -24,6 +23,7 @@ #include #include #include +#include #include #include #include @@ -42,8 +42,6 @@ #include #include #include -#include -#include #ifndef Dprintk #define Dprintk(x...) @@ -91,8 +89,6 @@ void show_mem(void) printk(KERN_INFO "%lu pages swap cached\n",cached); } -/* References to section boundaries */ - int after_bootmem; static __init void *spp_getpage(void) @@ -234,7 +230,6 @@ __init void *early_ioremap(unsigned long addr, unsigned long size) /* actually usually some more */ if (size >= LARGE_PAGE_SIZE) { - printk("SMBIOS area too long %lu\n", size); return NULL; } set_pmd(temp_mappings[0].pmd, __pmd(map | _KERNPG_TABLE | _PAGE_PSE)); @@ -255,18 +250,24 @@ __init void early_iounmap(void *addr, unsigned long size) } static void __meminit -phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end) +phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end) { - int i; + int i = pmd_index(address); - for (i = 0; i < PTRS_PER_PMD; pmd++, i++, address += PMD_SIZE) { + for (; i < PTRS_PER_PMD; i++, address += PMD_SIZE) { unsigned long entry; + pmd_t *pmd = pmd_page + pmd_index(address); - if (address > end) { - for (; i < PTRS_PER_PMD; i++, pmd++) - set_pmd(pmd, __pmd(0)); + if (address >= end) { + if (!after_bootmem) + for (; i < PTRS_PER_PMD; i++, pmd++) + set_pmd(pmd, __pmd(0)); break; } + + if (pmd_val(*pmd)) + continue; + entry = _PAGE_NX|_PAGE_PSE|_KERNPG_TABLE|_PAGE_GLOBAL|address; entry &= __supported_pte_mask; set_pmd(pmd, __pmd(entry)); @@ -276,45 +277,41 @@ phys_pmd_init(pmd_t *pmd, unsigned long address, unsigned long end) static void __meminit phys_pmd_update(pud_t *pud, unsigned long address, unsigned long end) { - pmd_t *pmd = pmd_offset(pud, (unsigned long)__va(address)); - - if (pmd_none(*pmd)) { - spin_lock(&init_mm.page_table_lock); - phys_pmd_init(pmd, address, end); - spin_unlock(&init_mm.page_table_lock); - __flush_tlb_all(); - } + pmd_t *pmd = pmd_offset(pud,0); + spin_lock(&init_mm.page_table_lock); + phys_pmd_init(pmd, address, end); + spin_unlock(&init_mm.page_table_lock); + __flush_tlb_all(); } -static void __meminit phys_pud_init(pud_t *pud, unsigned long address, unsigned long end) +static void __meminit phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end) { - long i = pud_index(address); + int i = pud_index(addr); - pud = pud + i; - - if (after_bootmem && pud_val(*pud)) { - phys_pmd_update(pud, address, end); - return; - } - for (; i < PTRS_PER_PUD; pud++, i++) { + for (; i < PTRS_PER_PUD; i++, addr = (addr & PUD_MASK) + PUD_SIZE ) { int map; - unsigned long paddr, pmd_phys; + unsigned long pmd_phys; + pud_t *pud = pud_page + pud_index(addr); pmd_t *pmd; - paddr = (address & PGDIR_MASK) + i*PUD_SIZE; - if (paddr >= end) + if (addr >= end) break; - if (!after_bootmem && !e820_any_mapped(paddr, paddr+PUD_SIZE, 0)) { + if (!after_bootmem && !e820_any_mapped(addr,addr+PUD_SIZE,0)) { set_pud(pud, __pud(0)); continue; } + if (pud_val(*pud)) { + phys_pmd_update(pud, addr, end); + continue; + } + pmd = alloc_low_page(&map, &pmd_phys); spin_lock(&init_mm.page_table_lock); set_pud(pud, __pud(pmd_phys | _KERNPG_TABLE)); - phys_pmd_init(pmd, paddr, end); + phys_pmd_init(pmd, addr, end); spin_unlock(&init_mm.page_table_lock); unmap_low_page(map); } @@ -340,9 +337,6 @@ static void __init find_early_table_space(unsigned long end) table_start >>= PAGE_SHIFT; table_end = table_start; - - early_printk("kernel direct mapping tables up to %lx @ %lx-%lx\n", - end, table_start << PAGE_SHIFT, table_end << PAGE_SHIFT); } /* Setup the direct mapping of the physical memory at PAGE_OFFSET. @@ -373,7 +367,7 @@ void __meminit init_memory_mapping(unsigned long start, unsigned long end) pud_t *pud; if (after_bootmem) - pud = pud_offset_k(pgd, start & PGDIR_MASK); + pud = pud_offset(pgd, start & PGDIR_MASK); else pud = alloc_low_page(&map, &pud_phys); @@ -406,69 +400,18 @@ void __cpuinit zap_low_mappings(int cpu) __flush_tlb_all(); } -/* Compute zone sizes for the DMA and DMA32 zones in a node. */ -__init void -size_zones(unsigned long *z, unsigned long *h, - unsigned long start_pfn, unsigned long end_pfn) -{ - int i; - unsigned long w; - - for (i = 0; i < MAX_NR_ZONES; i++) - z[i] = 0; - - if (start_pfn < MAX_DMA_PFN) - z[ZONE_DMA] = MAX_DMA_PFN - start_pfn; - if (start_pfn < MAX_DMA32_PFN) { - unsigned long dma32_pfn = MAX_DMA32_PFN; - if (dma32_pfn > end_pfn) - dma32_pfn = end_pfn; - z[ZONE_DMA32] = dma32_pfn - start_pfn; - } - z[ZONE_NORMAL] = end_pfn - start_pfn; - - /* Remove lower zones from higher ones. */ - w = 0; - for (i = 0; i < MAX_NR_ZONES; i++) { - if (z[i]) - z[i] -= w; - w += z[i]; - } - - /* Compute holes */ - w = start_pfn; - for (i = 0; i < MAX_NR_ZONES; i++) { - unsigned long s = w; - w += z[i]; - h[i] = e820_hole_size(s, w); - } - - /* Add the space pace needed for mem_map to the holes too. */ - for (i = 0; i < MAX_NR_ZONES; i++) - h[i] += (z[i] * sizeof(struct page)) / PAGE_SIZE; - - /* The 16MB DMA zone has the kernel and other misc mappings. - Account them too */ - if (h[ZONE_DMA]) { - h[ZONE_DMA] += dma_reserve; - if (h[ZONE_DMA] >= z[ZONE_DMA]) { - printk(KERN_WARNING - "Kernel too large and filling up ZONE_DMA?\n"); - h[ZONE_DMA] = z[ZONE_DMA]; - } - } -} - #ifndef CONFIG_NUMA void __init paging_init(void) { - unsigned long zones[MAX_NR_ZONES], holes[MAX_NR_ZONES]; + unsigned long max_zone_pfns[MAX_NR_ZONES]; + memset(max_zone_pfns, 0, sizeof(max_zone_pfns)); + max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; + max_zone_pfns[ZONE_DMA32] = MAX_DMA32_PFN; + max_zone_pfns[ZONE_NORMAL] = end_pfn; memory_present(0, 0, end_pfn); sparse_init(); - size_zones(zones, holes, 0, end_pfn); - free_area_init_node(0, NODE_DATA(0), zones, - __pa(PAGE_OFFSET) >> PAGE_SHIFT, holes); + free_area_init_nodes(max_zone_pfns); } #endif @@ -531,8 +474,6 @@ static inline int page_is_ram (unsigned long pagenr) /* * Memory hotplug specific functions */ -#if defined(CONFIG_ACPI_HOTPLUG_MEMORY) || defined(CONFIG_ACPI_HOTPLUG_MEMORY_MODULE) - void online_page(struct page *page) { ClearPageReserved(page); @@ -542,58 +483,31 @@ void online_page(struct page *page) num_physpages++; } -#ifndef CONFIG_MEMORY_HOTPLUG -/* - * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance, - * just online the pages. - */ -int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages) -{ - int err = -EIO; - unsigned long pfn; - unsigned long total = 0, mem = 0; - for (pfn = start_pfn; pfn < start_pfn + nr_pages; pfn++) { - if (pfn_valid(pfn)) { - online_page(pfn_to_page(pfn)); - err = 0; - mem++; - } - total++; - } - if (!err) { - z->spanned_pages += total; - z->present_pages += mem; - z->zone_pgdat->node_spanned_pages += total; - z->zone_pgdat->node_present_pages += mem; - } - return err; -} -#endif - +#ifdef CONFIG_MEMORY_HOTPLUG /* * Memory is added always to NORMAL zone. This means you will never get * additional DMA/DMA32 memory. */ -int add_memory(u64 start, u64 size) +int arch_add_memory(int nid, u64 start, u64 size) { - struct pglist_data *pgdat = NODE_DATA(0); - struct zone *zone = pgdat->node_zones + MAX_NR_ZONES-2; + struct pglist_data *pgdat = NODE_DATA(nid); + struct zone *zone = pgdat->node_zones + ZONE_NORMAL; unsigned long start_pfn = start >> PAGE_SHIFT; unsigned long nr_pages = size >> PAGE_SHIFT; int ret; + init_memory_mapping(start, (start + size -1)); + ret = __add_pages(zone, start_pfn, nr_pages); if (ret) goto error; - init_memory_mapping(start, (start + size -1)); - return ret; error: printk("%s: Problem encountered in __add_pages!\n", __func__); return ret; } -EXPORT_SYMBOL_GPL(add_memory); +EXPORT_SYMBOL_GPL(arch_add_memory); int remove_memory(u64 start, u64 size) { @@ -601,6 +515,42 @@ int remove_memory(u64 start, u64 size) } EXPORT_SYMBOL_GPL(remove_memory); +#if !defined(CONFIG_ACPI_NUMA) && defined(CONFIG_NUMA) +int memory_add_physaddr_to_nid(u64 start) +{ + return 0; +} +EXPORT_SYMBOL_GPL(memory_add_physaddr_to_nid); +#endif + +#endif /* CONFIG_MEMORY_HOTPLUG */ + +#ifdef CONFIG_MEMORY_HOTPLUG_RESERVE +/* + * Memory Hotadd without sparsemem. The mem_maps have been allocated in advance, + * just online the pages. + */ +int __add_pages(struct zone *z, unsigned long start_pfn, unsigned long nr_pages) +{ + int err = -EIO; + unsigned long pfn; + unsigned long total = 0, mem = 0; + for (pfn = start_pfn; pfn < start_pfn + nr_pages; pfn++) { + if (pfn_valid(pfn)) { + online_page(pfn_to_page(pfn)); + err = 0; + mem++; + } + total++; + } + if (!err) { + z->spanned_pages += total; + z->present_pages += mem; + z->zone_pgdat->node_spanned_pages += total; + z->zone_pgdat->node_present_pages += mem; + } + return err; +} #endif /* @@ -632,16 +582,7 @@ void __init mem_init(void) { long codesize, reservedpages, datasize, initsize; -#ifdef CONFIG_SWIOTLB - pci_swiotlb_init(); -#endif - no_iommu_init(); - - /* How many end-of-memory variables you have, grandma! */ - max_low_pfn = end_pfn; - max_pfn = end_pfn; - num_physpages = end_pfn; - high_memory = (void *) __va(end_pfn * PAGE_SIZE); + pci_iommu_alloc(); /* clear the zero-page */ memset(empty_zero_page, 0, PAGE_SIZE); @@ -654,7 +595,8 @@ void __init mem_init(void) #else totalram_pages = free_all_bootmem(); #endif - reservedpages = end_pfn - totalram_pages - e820_hole_size(0, end_pfn); + reservedpages = end_pfn - totalram_pages - + absent_pages_in_range(0, end_pfn); after_bootmem = 1; @@ -689,34 +631,44 @@ void __init mem_init(void) #endif } -void free_initmem(void) +void free_init_pages(char *what, unsigned long begin, unsigned long end) { unsigned long addr; - addr = (unsigned long)(&__init_begin); - for (; addr < (unsigned long)(&__init_end); addr += PAGE_SIZE) { + if (begin >= end) + return; + + printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10); + for (addr = begin; addr < end; addr += PAGE_SIZE) { ClearPageReserved(virt_to_page(addr)); init_page_count(virt_to_page(addr)); - memset((void *)(addr & ~(PAGE_SIZE-1)), 0xcc, PAGE_SIZE); + memset((void *)(addr & ~(PAGE_SIZE-1)), + POISON_FREE_INITMEM, PAGE_SIZE); free_page(addr); totalram_pages++; } - memset(__initdata_begin, 0xba, __initdata_end - __initdata_begin); - printk ("Freeing unused kernel memory: %luk freed\n", (__init_end - __init_begin) >> 10); +} + +void free_initmem(void) +{ + memset(__initdata_begin, POISON_FREE_INITDATA, + __initdata_end - __initdata_begin); + free_init_pages("unused kernel memory", + (unsigned long)(&__init_begin), + (unsigned long)(&__init_end)); } #ifdef CONFIG_DEBUG_RODATA -extern char __start_rodata, __end_rodata; void mark_rodata_ro(void) { - unsigned long addr = (unsigned long)&__start_rodata; + unsigned long addr = (unsigned long)__start_rodata; - for (; addr < (unsigned long)&__end_rodata; addr += PAGE_SIZE) + for (; addr < (unsigned long)__end_rodata; addr += PAGE_SIZE) change_page_attr_addr(addr, 1, PAGE_KERNEL_RO); printk ("Write protecting the kernel read-only data: %luk\n", - (&__end_rodata - &__start_rodata) >> 10); + (__end_rodata - __start_rodata) >> 10); /* * change_page_attr_addr() requires a global_flush_tlb() call after it. @@ -731,29 +683,36 @@ void mark_rodata_ro(void) #ifdef CONFIG_BLK_DEV_INITRD void free_initrd_mem(unsigned long start, unsigned long end) { - if (start >= end) - return; - printk ("Freeing initrd memory: %ldk freed\n", (end - start) >> 10); - for (; start < end; start += PAGE_SIZE) { - ClearPageReserved(virt_to_page(start)); - init_page_count(virt_to_page(start)); - free_page(start); - totalram_pages++; - } + free_init_pages("initrd memory", start, end); } #endif void __init reserve_bootmem_generic(unsigned long phys, unsigned len) { - /* Should check here against the e820 map to avoid double free */ #ifdef CONFIG_NUMA int nid = phys_to_nid(phys); +#endif + unsigned long pfn = phys >> PAGE_SHIFT; + if (pfn >= end_pfn) { + /* This can happen with kdump kernels when accessing firmware + tables. */ + if (pfn < end_pfn_map) + return; + printk(KERN_ERR "reserve_bootmem: illegal reserve %lx %u\n", + phys, len); + return; + } + + /* Should check here against the e820 map to avoid double free */ +#ifdef CONFIG_NUMA reserve_bootmem_node(NODE_DATA(nid), phys, len); #else reserve_bootmem(phys, len); #endif - if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) + if (phys+len <= MAX_DMA_PFN*PAGE_SIZE) { dma_reserve += len / PAGE_SIZE; + set_dma_reserve(dma_reserve); + } } int kern_addr_valid(unsigned long addr) @@ -812,14 +771,15 @@ static __init int x8664_sysctl_init(void) __initcall(x8664_sysctl_init); #endif -/* A pseudo VMAs to allow ptrace access for the vsyscall page. This only +/* A pseudo VMA to allow ptrace access for the vsyscall page. This only covers the 64bit vsyscall page now. 32bit has a real VMA now and does not need special handling anymore. */ static struct vm_area_struct gate_vma = { .vm_start = VSYSCALL_START, - .vm_end = VSYSCALL_END, - .vm_page_prot = PAGE_READONLY + .vm_end = VSYSCALL_START + (VSYSCALL_MAPPED_PAGES << PAGE_SHIFT), + .vm_page_prot = PAGE_READONLY_EXEC, + .vm_flags = VM_READ | VM_EXEC }; struct vm_area_struct *get_gate_vma(struct task_struct *tsk)