86ee79c3db
tlb_flush_mmu() needs to flush pending TLB entries before processing the mmu_gather ->pages list. Noticed by Benjamin Herrenschmidt. Signed-off-by: David S. Miller <davem@davemloft.net>
112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
#ifndef _SPARC64_TLB_H
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#define _SPARC64_TLB_H
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#include <linux/swap.h>
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#include <linux/pagemap.h>
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#include <asm/pgalloc.h>
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#include <asm/tlbflush.h>
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#include <asm/mmu_context.h>
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#define TLB_BATCH_NR 192
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/*
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* For UP we don't need to worry about TLB flush
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* and page free order so much..
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*/
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#ifdef CONFIG_SMP
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#define FREE_PTE_NR 506
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#define tlb_fast_mode(bp) ((bp)->pages_nr == ~0U)
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#else
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#define FREE_PTE_NR 1
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#define tlb_fast_mode(bp) 1
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#endif
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struct mmu_gather {
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struct mm_struct *mm;
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unsigned int pages_nr;
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unsigned int need_flush;
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unsigned int fullmm;
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unsigned int tlb_nr;
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unsigned long vaddrs[TLB_BATCH_NR];
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struct page *pages[FREE_PTE_NR];
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};
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DECLARE_PER_CPU(struct mmu_gather, mmu_gathers);
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#ifdef CONFIG_SMP
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extern void smp_flush_tlb_pending(struct mm_struct *,
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unsigned long, unsigned long *);
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#endif
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extern void __flush_tlb_pending(unsigned long, unsigned long, unsigned long *);
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extern void flush_tlb_pending(void);
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static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush)
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{
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struct mmu_gather *mp = &get_cpu_var(mmu_gathers);
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BUG_ON(mp->tlb_nr);
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mp->mm = mm;
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mp->pages_nr = num_online_cpus() > 1 ? 0U : ~0U;
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mp->fullmm = full_mm_flush;
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return mp;
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}
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static inline void tlb_flush_mmu(struct mmu_gather *mp)
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{
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if (!mp->fullmm)
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flush_tlb_pending();
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if (mp->need_flush) {
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free_pages_and_swap_cache(mp->pages, mp->pages_nr);
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mp->pages_nr = 0;
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mp->need_flush = 0;
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}
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}
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#ifdef CONFIG_SMP
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extern void smp_flush_tlb_mm(struct mm_struct *mm);
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#define do_flush_tlb_mm(mm) smp_flush_tlb_mm(mm)
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#else
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#define do_flush_tlb_mm(mm) __flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT)
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#endif
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static inline void tlb_finish_mmu(struct mmu_gather *mp, unsigned long start, unsigned long end)
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{
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tlb_flush_mmu(mp);
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if (mp->fullmm)
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mp->fullmm = 0;
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/* keep the page table cache within bounds */
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check_pgt_cache();
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put_cpu_var(mmu_gathers);
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}
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static inline void tlb_remove_page(struct mmu_gather *mp, struct page *page)
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{
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if (tlb_fast_mode(mp)) {
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free_page_and_swap_cache(page);
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return;
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}
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mp->need_flush = 1;
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mp->pages[mp->pages_nr++] = page;
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if (mp->pages_nr >= FREE_PTE_NR)
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tlb_flush_mmu(mp);
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}
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#define tlb_remove_tlb_entry(mp,ptep,addr) do { } while (0)
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#define pte_free_tlb(mp, ptepage) pte_free((mp)->mm, ptepage)
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#define pmd_free_tlb(mp, pmdp) pmd_free((mp)->mm, pmdp)
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#define pud_free_tlb(tlb,pudp) __pud_free_tlb(tlb,pudp)
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#define tlb_migrate_finish(mm) do { } while (0)
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#define tlb_start_vma(tlb, vma) do { } while (0)
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#define tlb_end_vma(tlb, vma) do { } while (0)
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#endif /* _SPARC64_TLB_H */
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