diff options
| -rw-r--r-- | arch/x86/mm/init_64.c | 9 | ||||
| -rw-r--r-- | arch/x86/mm/ioremap.c | 105 | ||||
| -rw-r--r-- | arch/x86/realmode/init.c | 17 |
3 files changed, 3 insertions, 128 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 07519a120449..2ead3c8a4c84 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -108,13 +108,13 @@ void sync_global_pgds(unsigned long start, unsigned long end) for (address = start; address <= end; address += PGDIR_SIZE) { const pgd_t *pgd_ref = pgd_offset_k(address); struct page *page; - pgd_t *pgd; if (pgd_none(*pgd_ref)) continue; spin_lock(&pgd_lock); list_for_each_entry(page, &pgd_list, lru) { + pgd_t *pgd; spinlock_t *pgt_lock; pgd = (pgd_t *)page_address(page) + pgd_index(address); @@ -130,13 +130,6 @@ void sync_global_pgds(unsigned long start, unsigned long end) spin_unlock(pgt_lock); } - - pgd = __va(real_mode_header->trampoline_pgd); - pgd += pgd_index(address); - - if (pgd_none(*pgd)) - set_pgd(pgd, *pgd_ref); - spin_unlock(&pgd_lock); } } diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c index e190f7b56653..78fe3f1ac49f 100644 --- a/arch/x86/mm/ioremap.c +++ b/arch/x86/mm/ioremap.c @@ -50,107 +50,6 @@ int ioremap_change_attr(unsigned long vaddr, unsigned long size, return err; } -#ifdef CONFIG_X86_64 -static void ident_pte_range(unsigned long paddr, unsigned long vaddr, - pmd_t *ppmd, pmd_t *vpmd, unsigned long end) -{ - pte_t *ppte = pte_offset_kernel(ppmd, paddr); - pte_t *vpte = pte_offset_kernel(vpmd, vaddr); - - do { - set_pte(ppte, *vpte); - } while (ppte++, vpte++, vaddr += PAGE_SIZE, vaddr != end); -} - -static int ident_pmd_range(unsigned long paddr, unsigned long vaddr, - pud_t *ppud, pud_t *vpud, unsigned long end) -{ - pmd_t *ppmd = pmd_offset(ppud, paddr); - pmd_t *vpmd = pmd_offset(vpud, vaddr); - unsigned long next; - - do { - next = pmd_addr_end(vaddr, end); - - if (!pmd_present(*ppmd)) { - pte_t *ppte = (pte_t *)get_zeroed_page(GFP_KERNEL); - if (!ppte) - return 1; - - set_pmd(ppmd, __pmd(_KERNPG_TABLE | __pa(ppte))); - } - - ident_pte_range(paddr, vaddr, ppmd, vpmd, next); - } while (ppmd++, vpmd++, vaddr = next, vaddr != end); - - return 0; -} - -static int ident_pud_range(unsigned long paddr, unsigned long vaddr, - pgd_t *ppgd, pgd_t *vpgd, unsigned long end) -{ - pud_t *ppud = pud_offset(ppgd, paddr); - pud_t *vpud = pud_offset(vpgd, vaddr); - unsigned long next; - - do { - next = pud_addr_end(vaddr, end); - - if (!pud_present(*ppud)) { - pmd_t *ppmd = (pmd_t *)get_zeroed_page(GFP_KERNEL); - if (!ppmd) - return 1; - - set_pud(ppud, __pud(_KERNPG_TABLE | __pa(ppmd))); - } - - if (ident_pmd_range(paddr, vaddr, ppud, vpud, next)) - return 1; - } while (ppud++, vpud++, vaddr = next, vaddr != end); - - return 0; -} - -static int insert_identity_mapping(resource_size_t paddr, unsigned long vaddr, - unsigned long size) -{ - unsigned long end = vaddr + size; - unsigned long next; - pgd_t *vpgd, *ppgd; - - /* Don't map over the guard hole. */ - if (paddr >= 0x800000000000 || paddr + size > 0x800000000000) - return 1; - - ppgd = __va(real_mode_header->trampoline_pgd) + pgd_index(paddr); - - vpgd = pgd_offset_k(vaddr); - do { - next = pgd_addr_end(vaddr, end); - - if (!pgd_present(*ppgd)) { - pud_t *ppud = (pud_t *)get_zeroed_page(GFP_KERNEL); - if (!ppud) - return 1; - - set_pgd(ppgd, __pgd(_KERNPG_TABLE | __pa(ppud))); - } - - if (ident_pud_range(paddr, vaddr, ppgd, vpgd, next)) - return 1; - } while (ppgd++, vpgd++, vaddr = next, vaddr != end); - - return 0; -} -#else -static inline int insert_identity_mapping(resource_size_t paddr, - unsigned long vaddr, - unsigned long size) -{ - return 0; -} -#endif /* CONFIG_X86_64 */ - /* * Remap an arbitrary physical address space into the kernel virtual * address space. Needed when the kernel wants to access high addresses @@ -264,10 +163,6 @@ static void __iomem *__ioremap_caller(resource_size_t phys_addr, ret_addr = (void __iomem *) (vaddr + offset); mmiotrace_ioremap(unaligned_phys_addr, unaligned_size, ret_addr); - if (insert_identity_mapping(phys_addr, vaddr, size)) - printk(KERN_WARNING "ioremap: unable to map 0x%llx in identity pagetable\n", - (unsigned long long)phys_addr); - /* * Check if the request spans more than any BAR in the iomem resource * tree. diff --git a/arch/x86/realmode/init.c b/arch/x86/realmode/init.c index 8e6ab6137852..cbca565af5bd 100644 --- a/arch/x86/realmode/init.c +++ b/arch/x86/realmode/init.c @@ -78,21 +78,8 @@ void __init setup_real_mode(void) *trampoline_cr4_features = read_cr4(); trampoline_pgd = (u64 *) __va(real_mode_header->trampoline_pgd); - - /* - * Create an identity mapping for all of physical memory. - */ - for (i = 0; i <= pgd_index(max_pfn << PAGE_SHIFT); i++) { - int index = pgd_index(PAGE_OFFSET) + i; - - trampoline_pgd[i] = (u64)pgd_val(swapper_pg_dir[index]); - } - - /* - * Copy the upper-half of the kernel pages tables. - */ - for (i = pgd_index(PAGE_OFFSET); i < PTRS_PER_PGD; i++) - trampoline_pgd[i] = (u64)pgd_val(swapper_pg_dir[i]); + trampoline_pgd[0] = __pa(level3_ident_pgt) + _KERNPG_TABLE; + trampoline_pgd[511] = __pa(level3_kernel_pgt) + _KERNPG_TABLE; #endif } |