blob: 600a2e9bfee2feea2a6dbc8b91d2a5a872d9d8d3 [file] [log] [blame]
#ifndef __UM_TLB_H
#define __UM_TLB_H
#include <linux/pagemap.h>
#include <linux/swap.h>
#include <asm/percpu.h>
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define tlb_flush(tlb) flush_tlb_mm((tlb)->mm)
/* struct mmu_gather is an opaque type used by the mm code for passing around
* any data needed by arch specific code for tlb_remove_page.
struct mmu_gather {
struct mm_struct *mm;
unsigned int need_flush; /* Really unmapped some ptes? */
unsigned long start;
unsigned long end;
unsigned int fullmm; /* non-zero means full mm flush */
static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
unsigned long address)
if (tlb->start > address)
tlb->start = address;
if (tlb->end < address + PAGE_SIZE)
tlb->end = address + PAGE_SIZE;
static inline void init_tlb_gather(struct mmu_gather *tlb)
tlb->need_flush = 0;
tlb->start = TASK_SIZE;
tlb->end = 0;
if (tlb->fullmm) {
tlb->start = 0;
tlb->end = TASK_SIZE;
static inline void
tlb_gather_mmu(struct mmu_gather *tlb, struct mm_struct *mm, unsigned long start, unsigned long end)
tlb->mm = mm;
tlb->start = start;
tlb->end = end;
tlb->fullmm = !(start | (end+1));
extern void flush_tlb_mm_range(struct mm_struct *mm, unsigned long start,
unsigned long end);
static inline void
tlb_flush_mmu_tlbonly(struct mmu_gather *tlb)
flush_tlb_mm_range(tlb->mm, tlb->start, tlb->end);
static inline void
tlb_flush_mmu_free(struct mmu_gather *tlb)
static inline void
tlb_flush_mmu(struct mmu_gather *tlb)
if (!tlb->need_flush)
/* tlb_finish_mmu
* Called at the end of the shootdown operation to free up any resources
* that were required.
static inline void
tlb_finish_mmu(struct mmu_gather *tlb, unsigned long start, unsigned long end)
/* keep the page table cache within bounds */
/* tlb_remove_page
* Must perform the equivalent to __free_pte(pte_get_and_clear(ptep)),
* while handling the additional races in SMP caused by other CPUs
* caching valid mappings in their TLBs.
static inline int __tlb_remove_page(struct mmu_gather *tlb, struct page *page)
tlb->need_flush = 1;
return false; /* avoid calling tlb_flush_mmu */
static inline void tlb_remove_page(struct mmu_gather *tlb, struct page *page)
__tlb_remove_page(tlb, page);
static inline bool __tlb_remove_page_size(struct mmu_gather *tlb,
struct page *page, int page_size)
return __tlb_remove_page(tlb, page);
static inline void tlb_remove_page_size(struct mmu_gather *tlb,
struct page *page, int page_size)
return tlb_remove_page(tlb, page);
* tlb_remove_tlb_entry - remember a pte unmapping for later tlb invalidation.
* Record the fact that pte's were really umapped in ->need_flush, so we can
* later optimise away the tlb invalidate. This helps when userspace is
* unmapping already-unmapped pages, which happens quite a lot.
#define tlb_remove_tlb_entry(tlb, ptep, address) \
do { \
tlb->need_flush = 1; \
__tlb_remove_tlb_entry(tlb, ptep, address); \
} while (0)
#define tlb_remove_huge_tlb_entry(h, tlb, ptep, address) \
tlb_remove_tlb_entry(tlb, ptep, address)
#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
unsigned int page_size)
#define pte_free_tlb(tlb, ptep, addr) __pte_free_tlb(tlb, ptep, addr)
#define pud_free_tlb(tlb, pudp, addr) __pud_free_tlb(tlb, pudp, addr)
#define pmd_free_tlb(tlb, pmdp, addr) __pmd_free_tlb(tlb, pmdp, addr)
#define tlb_migrate_finish(mm) do {} while (0)