[S390] 1K/2K page table pages.
This patch implements 1K/2K page table pages for s390. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Martin Schwidefsky
Родитель
0c1f1dcd8c
Коммит
146e4b3c8b
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@ -184,7 +184,7 @@ void kernel_map_pages(struct page *page, int numpages, int enable)
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pmd = pmd_offset(pud, address);
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pte = pte_offset_kernel(pmd, address);
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if (!enable) {
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ptep_invalidate(address, pte);
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ptep_invalidate(&init_mm, address, pte);
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continue;
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}
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*pte = mk_pte_phys(address, __pgprot(_PAGE_TYPE_RW));
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@ -26,8 +26,14 @@
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#ifndef CONFIG_64BIT
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#define ALLOC_ORDER 1
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#define TABLES_PER_PAGE 4
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#define FRAG_MASK 15UL
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#define SECOND_HALVES 10UL
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#else
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#define ALLOC_ORDER 2
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#define TABLES_PER_PAGE 2
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#define FRAG_MASK 3UL
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#define SECOND_HALVES 2UL
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#endif
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unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
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@ -45,13 +51,20 @@ unsigned long *crst_table_alloc(struct mm_struct *mm, int noexec)
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}
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page->index = page_to_phys(shadow);
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}
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spin_lock(&mm->page_table_lock);
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list_add(&page->lru, &mm->context.crst_list);
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spin_unlock(&mm->page_table_lock);
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return (unsigned long *) page_to_phys(page);
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}
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void crst_table_free(unsigned long *table)
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void crst_table_free(struct mm_struct *mm, unsigned long *table)
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{
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unsigned long *shadow = get_shadow_table(table);
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struct page *page = virt_to_page(table);
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spin_lock(&mm->page_table_lock);
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list_del(&page->lru);
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spin_unlock(&mm->page_table_lock);
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if (shadow)
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free_pages((unsigned long) shadow, ALLOC_ORDER);
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free_pages((unsigned long) table, ALLOC_ORDER);
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@ -60,37 +73,84 @@ void crst_table_free(unsigned long *table)
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/*
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* page table entry allocation/free routines.
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*/
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unsigned long *page_table_alloc(int noexec)
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unsigned long *page_table_alloc(struct mm_struct *mm)
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{
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struct page *page = alloc_page(GFP_KERNEL);
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struct page *page;
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unsigned long *table;
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unsigned long bits;
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if (!page)
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return NULL;
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page->index = 0;
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if (noexec) {
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struct page *shadow = alloc_page(GFP_KERNEL);
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if (!shadow) {
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__free_page(page);
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return NULL;
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}
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table = (unsigned long *) page_to_phys(shadow);
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clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
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page->index = (addr_t) table;
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bits = mm->context.noexec ? 3UL : 1UL;
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spin_lock(&mm->page_table_lock);
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page = NULL;
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if (!list_empty(&mm->context.pgtable_list)) {
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page = list_first_entry(&mm->context.pgtable_list,
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struct page, lru);
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if ((page->flags & FRAG_MASK) == ((1UL << TABLES_PER_PAGE) - 1))
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page = NULL;
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}
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if (!page) {
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spin_unlock(&mm->page_table_lock);
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page = alloc_page(GFP_KERNEL|__GFP_REPEAT);
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if (!page)
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return NULL;
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pgtable_page_ctor(page);
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page->flags &= ~FRAG_MASK;
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table = (unsigned long *) page_to_phys(page);
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clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
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spin_lock(&mm->page_table_lock);
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list_add(&page->lru, &mm->context.pgtable_list);
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}
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pgtable_page_ctor(page);
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table = (unsigned long *) page_to_phys(page);
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clear_table(table, _PAGE_TYPE_EMPTY, PAGE_SIZE);
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while (page->flags & bits) {
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table += 256;
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bits <<= 1;
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}
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page->flags |= bits;
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if ((page->flags & FRAG_MASK) == ((1UL << TABLES_PER_PAGE) - 1))
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list_move_tail(&page->lru, &mm->context.pgtable_list);
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spin_unlock(&mm->page_table_lock);
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return table;
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}
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void page_table_free(unsigned long *table)
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void page_table_free(struct mm_struct *mm, unsigned long *table)
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{
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unsigned long *shadow = get_shadow_pte(table);
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pgtable_page_dtor(virt_to_page(table));
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if (shadow)
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free_page((unsigned long) shadow);
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free_page((unsigned long) table);
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struct page *page;
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unsigned long bits;
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bits = mm->context.noexec ? 3UL : 1UL;
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bits <<= (__pa(table) & (PAGE_SIZE - 1)) / 256 / sizeof(unsigned long);
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page = pfn_to_page(__pa(table) >> PAGE_SHIFT);
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spin_lock(&mm->page_table_lock);
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page->flags ^= bits;
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if (page->flags & FRAG_MASK) {
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/* Page now has some free pgtable fragments. */
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list_move(&page->lru, &mm->context.pgtable_list);
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page = NULL;
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} else
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/* All fragments of the 4K page have been freed. */
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list_del(&page->lru);
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spin_unlock(&mm->page_table_lock);
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if (page) {
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pgtable_page_dtor(page);
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__free_page(page);
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}
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}
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void disable_noexec(struct mm_struct *mm, struct task_struct *tsk)
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{
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struct page *page;
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spin_lock(&mm->page_table_lock);
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/* Free shadow region and segment tables. */
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list_for_each_entry(page, &mm->context.crst_list, lru)
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if (page->index) {
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free_pages((unsigned long) page->index, ALLOC_ORDER);
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page->index = 0;
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}
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/* "Free" second halves of page tables. */
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list_for_each_entry(page, &mm->context.pgtable_list, lru)
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page->flags &= ~SECOND_HALVES;
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spin_unlock(&mm->page_table_lock);
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mm->context.noexec = 0;
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update_mm(mm, tsk);
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}
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@ -84,13 +84,18 @@ static inline pmd_t *vmem_pmd_alloc(void)
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return pmd;
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}
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static inline pte_t *vmem_pte_alloc(void)
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static pte_t __init_refok *vmem_pte_alloc(void)
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{
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pte_t *pte = vmem_alloc_pages(0);
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pte_t *pte;
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if (slab_is_available())
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pte = (pte_t *) page_table_alloc(&init_mm);
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else
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pte = alloc_bootmem(PTRS_PER_PTE * sizeof(pte_t));
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if (!pte)
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return NULL;
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clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY, PAGE_SIZE);
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clear_table((unsigned long *) pte, _PAGE_TYPE_EMPTY,
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PTRS_PER_PTE * sizeof(pte_t));
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return pte;
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}
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@ -360,6 +365,9 @@ void __init vmem_map_init(void)
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{
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int i;
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INIT_LIST_HEAD(&init_mm.context.crst_list);
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INIT_LIST_HEAD(&init_mm.context.pgtable_list);
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init_mm.context.noexec = 0;
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NODE_DATA(0)->node_mem_map = VMEM_MAP;
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for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++)
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vmem_add_mem(memory_chunk[i].addr, memory_chunk[i].size);
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@ -115,6 +115,7 @@ typedef s390_regs elf_gregset_t;
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#include <linux/sched.h> /* for task_struct */
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#include <asm/system.h> /* for save_access_regs */
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#include <asm/mmu_context.h>
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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@ -214,4 +215,16 @@ do { \
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} while (0)
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#endif /* __s390x__ */
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/*
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* An executable for which elf_read_implies_exec() returns TRUE will
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* have the READ_IMPLIES_EXEC personality flag set automatically.
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*/
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#define elf_read_implies_exec(ex, executable_stack) \
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({ \
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if (current->mm->context.noexec && \
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executable_stack != EXSTACK_DISABLE_X) \
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disable_noexec(current->mm, current); \
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current->mm->context.noexec == 0; \
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})
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#endif
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@ -1,7 +1,11 @@
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#ifndef __MMU_H
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#define __MMU_H
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/* Default "unsigned long" context */
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typedef unsigned long mm_context_t;
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typedef struct {
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struct list_head crst_list;
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struct list_head pgtable_list;
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unsigned long asce_bits;
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int noexec;
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} mm_context_t;
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#endif
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@ -10,15 +10,17 @@
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#define __S390_MMU_CONTEXT_H
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#include <asm/pgalloc.h>
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#include <asm/uaccess.h>
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#include <asm-generic/mm_hooks.h>
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static inline int init_new_context(struct task_struct *tsk,
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struct mm_struct *mm)
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{
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mm->context = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
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mm->context.asce_bits = _ASCE_TABLE_LENGTH | _ASCE_USER_BITS;
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#ifdef CONFIG_64BIT
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mm->context |= _ASCE_TYPE_REGION3;
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mm->context.asce_bits |= _ASCE_TYPE_REGION3;
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#endif
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mm->context.noexec = s390_noexec;
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return 0;
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}
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@ -32,11 +34,13 @@ static inline int init_new_context(struct task_struct *tsk,
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static inline void update_mm(struct mm_struct *mm, struct task_struct *tsk)
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{
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S390_lowcore.user_asce = mm->context | __pa(mm->pgd);
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pgd_t *pgd = mm->pgd;
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S390_lowcore.user_asce = mm->context.asce_bits | __pa(pgd);
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if (switch_amode) {
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/* Load primary space page table origin. */
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pgd_t *shadow_pgd = get_shadow_table(mm->pgd) ? : mm->pgd;
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S390_lowcore.user_exec_asce = mm->context | __pa(shadow_pgd);
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pgd = mm->context.noexec ? get_shadow_table(pgd) : pgd;
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S390_lowcore.user_exec_asce = mm->context.asce_bits | __pa(pgd);
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asm volatile(LCTL_OPCODE" 1,1,%0\n"
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: : "m" (S390_lowcore.user_exec_asce) );
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} else
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@ -74,43 +74,17 @@ static inline void copy_page(void *to, void *from)
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typedef struct { unsigned long pgprot; } pgprot_t;
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typedef struct { unsigned long pte; } pte_t;
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#define pte_val(x) ((x).pte)
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#define pgprot_val(x) ((x).pgprot)
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#ifndef __s390x__
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typedef struct { unsigned long pmd; } pmd_t;
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typedef struct { unsigned long pud; } pud_t;
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typedef struct {
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unsigned long pgd0;
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unsigned long pgd1;
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unsigned long pgd2;
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unsigned long pgd3;
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} pgd_t;
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#define pmd_val(x) ((x).pmd)
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#define pud_val(x) ((x).pud)
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#define pgd_val(x) ((x).pgd0)
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#else /* __s390x__ */
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typedef struct {
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unsigned long pmd0;
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unsigned long pmd1;
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} pmd_t;
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typedef struct { unsigned long pud; } pud_t;
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typedef struct { unsigned long pgd; } pgd_t;
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typedef pte_t *pgtable_t;
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#define pmd_val(x) ((x).pmd0)
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#define pmd_val1(x) ((x).pmd1)
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#define pgprot_val(x) ((x).pgprot)
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#define pte_val(x) ((x).pte)
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#define pmd_val(x) ((x).pmd)
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#define pud_val(x) ((x).pud)
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#define pgd_val(x) ((x).pgd)
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#endif /* __s390x__ */
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typedef struct page *pgtable_t;
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#define __pte(x) ((pte_t) { (x) } )
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#define __pmd(x) ((pmd_t) { (x) } )
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#define __pgd(x) ((pgd_t) { (x) } )
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@ -167,7 +141,7 @@ static inline int pfn_valid(unsigned long pfn)
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#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
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#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | VM_EXEC | \
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#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
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VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
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#include <asm-generic/memory_model.h>
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@ -20,10 +20,11 @@
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#define check_pgt_cache() do {} while (0)
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unsigned long *crst_table_alloc(struct mm_struct *, int);
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void crst_table_free(unsigned long *);
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void crst_table_free(struct mm_struct *, unsigned long *);
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unsigned long *page_table_alloc(int);
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void page_table_free(unsigned long *);
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unsigned long *page_table_alloc(struct mm_struct *);
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void page_table_free(struct mm_struct *, unsigned long *);
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void disable_noexec(struct mm_struct *, struct task_struct *);
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static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
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{
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@ -80,12 +81,12 @@ static inline unsigned long pgd_entry_type(struct mm_struct *mm)
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static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long vmaddr)
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{
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unsigned long *crst = crst_table_alloc(mm, s390_noexec);
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if (crst)
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crst_table_init(crst, _SEGMENT_ENTRY_EMPTY);
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return (pmd_t *) crst;
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unsigned long *table = crst_table_alloc(mm, mm->context.noexec);
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if (table)
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crst_table_init(table, _SEGMENT_ENTRY_EMPTY);
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return (pmd_t *) table;
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}
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#define pmd_free(mm, pmd) crst_table_free((unsigned long *)pmd)
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#define pmd_free(mm, pmd) crst_table_free(mm, (unsigned long *) pmd)
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#define pgd_populate(mm, pgd, pud) BUG()
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#define pgd_populate_kernel(mm, pgd, pud) BUG()
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@ -98,63 +99,55 @@ static inline void pud_populate_kernel(struct mm_struct *mm,
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static inline void pud_populate(struct mm_struct *mm, pud_t *pud, pmd_t *pmd)
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{
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pud_t *shadow_pud = get_shadow_table(pud);
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pmd_t *shadow_pmd = get_shadow_table(pmd);
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if (shadow_pud && shadow_pmd)
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pud_populate_kernel(mm, shadow_pud, shadow_pmd);
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pud_populate_kernel(mm, pud, pmd);
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if (mm->context.noexec) {
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pud = get_shadow_table(pud);
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pmd = get_shadow_table(pmd);
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pud_populate_kernel(mm, pud, pmd);
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}
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}
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#endif /* __s390x__ */
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static inline pgd_t *pgd_alloc(struct mm_struct *mm)
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{
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unsigned long *crst = crst_table_alloc(mm, s390_noexec);
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unsigned long *crst;
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INIT_LIST_HEAD(&mm->context.crst_list);
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INIT_LIST_HEAD(&mm->context.pgtable_list);
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crst = crst_table_alloc(mm, s390_noexec);
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if (crst)
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crst_table_init(crst, pgd_entry_type(mm));
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return (pgd_t *) crst;
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}
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#define pgd_free(mm, pgd) crst_table_free((unsigned long *) pgd)
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#define pgd_free(mm, pgd) crst_table_free(mm, (unsigned long *) pgd)
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static inline void
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pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
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static inline void pmd_populate_kernel(struct mm_struct *mm,
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pmd_t *pmd, pte_t *pte)
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{
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#ifndef __s390x__
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pmd_val(pmd[0]) = _SEGMENT_ENTRY + __pa(pte);
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pmd_val(pmd[1]) = _SEGMENT_ENTRY + __pa(pte+256);
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pmd_val(pmd[2]) = _SEGMENT_ENTRY + __pa(pte+512);
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pmd_val(pmd[3]) = _SEGMENT_ENTRY + __pa(pte+768);
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#else /* __s390x__ */
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pmd_val(*pmd) = _SEGMENT_ENTRY + __pa(pte);
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pmd_val1(*pmd) = _SEGMENT_ENTRY + __pa(pte+256);
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#endif /* __s390x__ */
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}
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static inline void
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pmd_populate(struct mm_struct *mm, pmd_t *pmd, pgtable_t page)
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static inline void pmd_populate(struct mm_struct *mm,
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pmd_t *pmd, pgtable_t pte)
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{
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pte_t *pte = (pte_t *)page_to_phys(page);
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pmd_t *shadow_pmd = get_shadow_table(pmd);
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pte_t *shadow_pte = get_shadow_pte(pte);
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pmd_populate_kernel(mm, pmd, pte);
|
||||
if (shadow_pmd && shadow_pte)
|
||||
pmd_populate_kernel(mm, shadow_pmd, shadow_pte);
|
||||
if (mm->context.noexec) {
|
||||
pmd = get_shadow_table(pmd);
|
||||
pmd_populate_kernel(mm, pmd, pte + PTRS_PER_PTE);
|
||||
}
|
||||
}
|
||||
#define pmd_pgtable(pmd) pmd_page(pmd)
|
||||
|
||||
#define pmd_pgtable(pmd) \
|
||||
(pgtable_t)(pmd_val(pmd) & -sizeof(pte_t)*PTRS_PER_PTE)
|
||||
|
||||
/*
|
||||
* page table entry allocation/free routines.
|
||||
*/
|
||||
#define pte_alloc_one_kernel(mm, vmaddr) \
|
||||
((pte_t *) page_table_alloc(s390_noexec))
|
||||
#define pte_alloc_one(mm, vmaddr) \
|
||||
virt_to_page(page_table_alloc(s390_noexec))
|
||||
#define pte_alloc_one_kernel(mm, vmaddr) ((pte_t *) page_table_alloc(mm))
|
||||
#define pte_alloc_one(mm, vmaddr) ((pte_t *) page_table_alloc(mm))
|
||||
|
||||
#define pte_free_kernel(mm, pte) \
|
||||
page_table_free((unsigned long *) pte)
|
||||
#define pte_free(mm, pte) \
|
||||
page_table_free((unsigned long *) page_to_phys((struct page *) pte))
|
||||
#define pte_free_kernel(mm, pte) page_table_free(mm, (unsigned long *) pte)
|
||||
#define pte_free(mm, pte) page_table_free(mm, (unsigned long *) pte)
|
||||
|
||||
#endif /* _S390_PGALLOC_H */
|
||||
|
|
|
|||
|
|
@ -57,11 +57,11 @@ extern char empty_zero_page[PAGE_SIZE];
|
|||
* PGDIR_SHIFT determines what a third-level page table entry can map
|
||||
*/
|
||||
#ifndef __s390x__
|
||||
# define PMD_SHIFT 22
|
||||
# define PUD_SHIFT 22
|
||||
# define PGDIR_SHIFT 22
|
||||
# define PMD_SHIFT 20
|
||||
# define PUD_SHIFT 20
|
||||
# define PGDIR_SHIFT 20
|
||||
#else /* __s390x__ */
|
||||
# define PMD_SHIFT 21
|
||||
# define PMD_SHIFT 20
|
||||
# define PUD_SHIFT 31
|
||||
# define PGDIR_SHIFT 31
|
||||
#endif /* __s390x__ */
|
||||
|
|
@ -79,17 +79,14 @@ extern char empty_zero_page[PAGE_SIZE];
|
|||
* for S390 segment-table entries are combined to one PGD
|
||||
* that leads to 1024 pte per pgd
|
||||
*/
|
||||
#define PTRS_PER_PTE 256
|
||||
#ifndef __s390x__
|
||||
# define PTRS_PER_PTE 1024
|
||||
# define PTRS_PER_PMD 1
|
||||
# define PTRS_PER_PUD 1
|
||||
# define PTRS_PER_PGD 512
|
||||
#define PTRS_PER_PMD 1
|
||||
#else /* __s390x__ */
|
||||
# define PTRS_PER_PTE 512
|
||||
# define PTRS_PER_PMD 1024
|
||||
# define PTRS_PER_PUD 1
|
||||
# define PTRS_PER_PGD 2048
|
||||
#define PTRS_PER_PMD 2048
|
||||
#endif /* __s390x__ */
|
||||
#define PTRS_PER_PUD 1
|
||||
#define PTRS_PER_PGD 2048
|
||||
|
||||
#define FIRST_USER_ADDRESS 0
|
||||
|
||||
|
|
@ -376,24 +373,6 @@ extern char empty_zero_page[PAGE_SIZE];
|
|||
# define PxD_SHADOW_SHIFT 2
|
||||
#endif /* __s390x__ */
|
||||
|
||||
static inline struct page *get_shadow_page(struct page *page)
|
||||
{
|
||||
if (s390_noexec && page->index)
|
||||
return virt_to_page((void *)(addr_t) page->index);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static inline void *get_shadow_pte(void *table)
|
||||
{
|
||||
unsigned long addr, offset;
|
||||
struct page *page;
|
||||
|
||||
addr = (unsigned long) table;
|
||||
offset = addr & (PAGE_SIZE - 1);
|
||||
page = virt_to_page((void *)(addr ^ offset));
|
||||
return (void *)(addr_t)(page->index ? (page->index | offset) : 0UL);
|
||||
}
|
||||
|
||||
static inline void *get_shadow_table(void *table)
|
||||
{
|
||||
unsigned long addr, offset;
|
||||
|
|
@ -411,17 +390,16 @@ static inline void *get_shadow_table(void *table)
|
|||
* hook is made available.
|
||||
*/
|
||||
static inline void set_pte_at(struct mm_struct *mm, unsigned long addr,
|
||||
pte_t *pteptr, pte_t pteval)
|
||||
pte_t *ptep, pte_t entry)
|
||||
{
|
||||
pte_t *shadow_pte = get_shadow_pte(pteptr);
|
||||
|
||||
*pteptr = pteval;
|
||||
if (shadow_pte) {
|
||||
if (!(pte_val(pteval) & _PAGE_INVALID) &&
|
||||
(pte_val(pteval) & _PAGE_SWX))
|
||||
pte_val(*shadow_pte) = pte_val(pteval) | _PAGE_RO;
|
||||
*ptep = entry;
|
||||
if (mm->context.noexec) {
|
||||
if (!(pte_val(entry) & _PAGE_INVALID) &&
|
||||
(pte_val(entry) & _PAGE_SWX))
|
||||
pte_val(entry) |= _PAGE_RO;
|
||||
else
|
||||
pte_val(*shadow_pte) = _PAGE_TYPE_EMPTY;
|
||||
pte_val(entry) = _PAGE_TYPE_EMPTY;
|
||||
ptep[PTRS_PER_PTE] = entry;
|
||||
}
|
||||
}
|
||||
|
||||
|
|
@ -536,14 +514,6 @@ static inline int pte_young(pte_t pte)
|
|||
#define pgd_clear(pgd) do { } while (0)
|
||||
#define pud_clear(pud) do { } while (0)
|
||||
|
||||
static inline void pmd_clear_kernel(pmd_t * pmdp)
|
||||
{
|
||||
pmd_val(pmdp[0]) = _SEGMENT_ENTRY_EMPTY;
|
||||
pmd_val(pmdp[1]) = _SEGMENT_ENTRY_EMPTY;
|
||||
pmd_val(pmdp[2]) = _SEGMENT_ENTRY_EMPTY;
|
||||
pmd_val(pmdp[3]) = _SEGMENT_ENTRY_EMPTY;
|
||||
}
|
||||
|
||||
#else /* __s390x__ */
|
||||
|
||||
#define pgd_clear(pgd) do { } while (0)
|
||||
|
|
@ -562,30 +532,27 @@ static inline void pud_clear(pud_t * pud)
|
|||
pud_clear_kernel(shadow);
|
||||
}
|
||||
|
||||
#endif /* __s390x__ */
|
||||
|
||||
static inline void pmd_clear_kernel(pmd_t * pmdp)
|
||||
{
|
||||
pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
|
||||
pmd_val1(*pmdp) = _SEGMENT_ENTRY_EMPTY;
|
||||
}
|
||||
|
||||
#endif /* __s390x__ */
|
||||
|
||||
static inline void pmd_clear(pmd_t * pmdp)
|
||||
static inline void pmd_clear(pmd_t *pmd)
|
||||
{
|
||||
pmd_t *shadow_pmd = get_shadow_table(pmdp);
|
||||
pmd_t *shadow = get_shadow_table(pmd);
|
||||
|
||||
pmd_clear_kernel(pmdp);
|
||||
if (shadow_pmd)
|
||||
pmd_clear_kernel(shadow_pmd);
|
||||
pmd_clear_kernel(pmd);
|
||||
if (shadow)
|
||||
pmd_clear_kernel(shadow);
|
||||
}
|
||||
|
||||
static inline void pte_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
|
||||
{
|
||||
pte_t *shadow_pte = get_shadow_pte(ptep);
|
||||
|
||||
pte_val(*ptep) = _PAGE_TYPE_EMPTY;
|
||||
if (shadow_pte)
|
||||
pte_val(*shadow_pte) = _PAGE_TYPE_EMPTY;
|
||||
if (mm->context.noexec)
|
||||
pte_val(ptep[PTRS_PER_PTE]) = _PAGE_TYPE_EMPTY;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -666,7 +633,7 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
|
|||
{
|
||||
if (!(pte_val(*ptep) & _PAGE_INVALID)) {
|
||||
#ifndef __s390x__
|
||||
/* S390 has 1mb segments, we are emulating 4MB segments */
|
||||
/* pto must point to the start of the segment table */
|
||||
pte_t *pto = (pte_t *) (((unsigned long) ptep) & 0x7ffffc00);
|
||||
#else
|
||||
/* ipte in zarch mode can do the math */
|
||||
|
|
@ -680,12 +647,12 @@ static inline void __ptep_ipte(unsigned long address, pte_t *ptep)
|
|||
pte_val(*ptep) = _PAGE_TYPE_EMPTY;
|
||||
}
|
||||
|
||||
static inline void ptep_invalidate(unsigned long address, pte_t *ptep)
|
||||
static inline void ptep_invalidate(struct mm_struct *mm,
|
||||
unsigned long address, pte_t *ptep)
|
||||
{
|
||||
__ptep_ipte(address, ptep);
|
||||
ptep = get_shadow_pte(ptep);
|
||||
if (ptep)
|
||||
__ptep_ipte(address, ptep);
|
||||
if (mm->context.noexec)
|
||||
__ptep_ipte(address, ptep + PTRS_PER_PTE);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -707,7 +674,7 @@ static inline void ptep_invalidate(unsigned long address, pte_t *ptep)
|
|||
pte_t __pte = *(__ptep); \
|
||||
if (atomic_read(&(__mm)->mm_users) > 1 || \
|
||||
(__mm) != current->active_mm) \
|
||||
ptep_invalidate(__address, __ptep); \
|
||||
ptep_invalidate(__mm, __address, __ptep); \
|
||||
else \
|
||||
pte_clear((__mm), (__address), (__ptep)); \
|
||||
__pte; \
|
||||
|
|
@ -718,7 +685,7 @@ static inline pte_t ptep_clear_flush(struct vm_area_struct *vma,
|
|||
unsigned long address, pte_t *ptep)
|
||||
{
|
||||
pte_t pte = *ptep;
|
||||
ptep_invalidate(address, ptep);
|
||||
ptep_invalidate(vma->vm_mm, address, ptep);
|
||||
return pte;
|
||||
}
|
||||
|
||||
|
|
@ -739,7 +706,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
|
|||
if (full)
|
||||
pte_clear(mm, addr, ptep);
|
||||
else
|
||||
ptep_invalidate(addr, ptep);
|
||||
ptep_invalidate(mm, addr, ptep);
|
||||
return pte;
|
||||
}
|
||||
|
||||
|
|
@ -750,7 +717,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
|
|||
if (pte_write(__pte)) { \
|
||||
if (atomic_read(&(__mm)->mm_users) > 1 || \
|
||||
(__mm) != current->active_mm) \
|
||||
ptep_invalidate(__addr, __ptep); \
|
||||
ptep_invalidate(__mm, __addr, __ptep); \
|
||||
set_pte_at(__mm, __addr, __ptep, pte_wrprotect(__pte)); \
|
||||
} \
|
||||
})
|
||||
|
|
@ -760,7 +727,7 @@ static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm,
|
|||
({ \
|
||||
int __changed = !pte_same(*(__ptep), __entry); \
|
||||
if (__changed) { \
|
||||
ptep_invalidate(__addr, __ptep); \
|
||||
ptep_invalidate((__vma)->vm_mm, __addr, __ptep); \
|
||||
set_pte_at((__vma)->vm_mm, __addr, __ptep, __entry); \
|
||||
} \
|
||||
__changed; \
|
||||
|
|
|
|||
|
|
@ -95,14 +95,14 @@ static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
|
|||
* pte_free_tlb frees a pte table and clears the CRSTE for the
|
||||
* page table from the tlb.
|
||||
*/
|
||||
static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t page)
|
||||
static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte)
|
||||
{
|
||||
if (!tlb->fullmm) {
|
||||
tlb->array[tlb->nr_ptes++] = page;
|
||||
tlb->array[tlb->nr_ptes++] = pte;
|
||||
if (tlb->nr_ptes >= tlb->nr_pmds)
|
||||
tlb_flush_mmu(tlb, 0, 0);
|
||||
} else
|
||||
pte_free(tlb->mm, page);
|
||||
pte_free(tlb->mm, pte);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
|
|||
|
|
@ -61,11 +61,12 @@ static inline void __tlb_flush_mm(struct mm_struct * mm)
|
|||
* only ran on the local cpu.
|
||||
*/
|
||||
if (MACHINE_HAS_IDTE) {
|
||||
pgd_t *shadow = get_shadow_table(mm->pgd);
|
||||
|
||||
if (shadow)
|
||||
__tlb_flush_idte((unsigned long) shadow | mm->context);
|
||||
__tlb_flush_idte((unsigned long) mm->pgd | mm->context);
|
||||
if (mm->context.noexec)
|
||||
__tlb_flush_idte((unsigned long)
|
||||
get_shadow_table(mm->pgd) |
|
||||
mm->context.asce_bits);
|
||||
__tlb_flush_idte((unsigned long) mm->pgd |
|
||||
mm->context.asce_bits);
|
||||
return;
|
||||
}
|
||||
preempt_disable();
|
||||
|
|
|
|||
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Ссылка в новой задаче