From: Peter Zijlstra Date: Wed, 25 May 2011 00:11:50 +0000 (-0700) Subject: sparc: mmu_gather rework X-Git-Tag: MMI-PSA29.97-13-9~19587 X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=90f08e399d054d017c0e2c5089a0f44a76418271;p=GitHub%2FMotorolaMobilityLLC%2Fkernel-slsi.git sparc: mmu_gather rework Rework the sparc mmu_gather usage to conform to the new world order :-) Sparc mmu_gather does two things: - tracks vaddrs to unhash - tracks pages to free Split these two things like powerpc has done and keep the vaddrs in per-cpu data structures and flush them on context switch. The remaining bits can then use the generic mmu_gather. Signed-off-by: Peter Zijlstra Acked-by: David Miller Cc: Benjamin Herrenschmidt Cc: Martin Schwidefsky Cc: Russell King Cc: Paul Mundt Cc: Jeff Dike Cc: Richard Weinberger Cc: Tony Luck Cc: KAMEZAWA Hiroyuki Cc: Hugh Dickins Cc: Mel Gorman Cc: KOSAKI Motohiro Cc: Nick Piggin Cc: Namhyung Kim Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- diff --git a/arch/sparc/include/asm/pgalloc_64.h b/arch/sparc/include/asm/pgalloc_64.h index 5bdfa2c6e400..4e5e0878144f 100644 --- a/arch/sparc/include/asm/pgalloc_64.h +++ b/arch/sparc/include/asm/pgalloc_64.h @@ -78,4 +78,7 @@ static inline void check_pgt_cache(void) quicklist_trim(0, NULL, 25, 16); } +#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) +#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) + #endif /* _SPARC64_PGALLOC_H */ diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h index b77128c80524..1e03c5a6b4f7 100644 --- a/arch/sparc/include/asm/pgtable_64.h +++ b/arch/sparc/include/asm/pgtable_64.h @@ -655,9 +655,11 @@ static inline int pte_special(pte_t pte) #define pte_unmap(pte) do { } while (0) /* Actual page table PTE updates. */ -extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig); +extern void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, + pte_t *ptep, pte_t orig, int fullmm); -static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *ptep, pte_t pte) +static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, + pte_t *ptep, pte_t pte, int fullmm) { pte_t orig = *ptep; @@ -670,12 +672,19 @@ static inline void set_pte_at(struct mm_struct *mm, unsigned long addr, pte_t *p * and SUN4V pte layout, so this inline test is fine. */ if (likely(mm != &init_mm) && (pte_val(orig) & _PAGE_VALID)) - tlb_batch_add(mm, addr, ptep, orig); + tlb_batch_add(mm, addr, ptep, orig, fullmm); } +#define set_pte_at(mm,addr,ptep,pte) \ + __set_pte_at((mm), (addr), (ptep), (pte), 0) + #define pte_clear(mm,addr,ptep) \ set_pte_at((mm), (addr), (ptep), __pte(0UL)) +#define __HAVE_ARCH_PTE_CLEAR_NOT_PRESENT_FULL +#define pte_clear_not_present_full(mm,addr,ptep,fullmm) \ + __set_pte_at((mm), (addr), (ptep), __pte(0UL), (fullmm)) + #ifdef DCACHE_ALIASING_POSSIBLE #define __HAVE_ARCH_MOVE_PTE #define move_pte(pte, prot, old_addr, new_addr) \ diff --git a/arch/sparc/include/asm/tlb_64.h b/arch/sparc/include/asm/tlb_64.h index dca406b9b6fc..190e18913cc6 100644 --- a/arch/sparc/include/asm/tlb_64.h +++ b/arch/sparc/include/asm/tlb_64.h @@ -7,66 +7,11 @@ #include #include -#define TLB_BATCH_NR 192 - -/* - * For UP we don't need to worry about TLB flush - * and page free order so much.. - */ -#ifdef CONFIG_SMP - #define FREE_PTE_NR 506 - #define tlb_fast_mode(bp) ((bp)->pages_nr == ~0U) -#else - #define FREE_PTE_NR 1 - #define tlb_fast_mode(bp) 1 -#endif - -struct mmu_gather { - struct mm_struct *mm; - unsigned int pages_nr; - unsigned int need_flush; - unsigned int fullmm; - unsigned int tlb_nr; - unsigned long vaddrs[TLB_BATCH_NR]; - struct page *pages[FREE_PTE_NR]; -}; - -DECLARE_PER_CPU(struct mmu_gather, mmu_gathers); - #ifdef CONFIG_SMP extern void smp_flush_tlb_pending(struct mm_struct *, unsigned long, unsigned long *); #endif -extern void __flush_tlb_pending(unsigned long, unsigned long, unsigned long *); -extern void flush_tlb_pending(void); - -static inline struct mmu_gather *tlb_gather_mmu(struct mm_struct *mm, unsigned int full_mm_flush) -{ - struct mmu_gather *mp = &get_cpu_var(mmu_gathers); - - BUG_ON(mp->tlb_nr); - - mp->mm = mm; - mp->pages_nr = num_online_cpus() > 1 ? 0U : ~0U; - mp->fullmm = full_mm_flush; - - return mp; -} - - -static inline void tlb_flush_mmu(struct mmu_gather *mp) -{ - if (!mp->fullmm) - flush_tlb_pending(); - if (mp->need_flush) { - free_pages_and_swap_cache(mp->pages, mp->pages_nr); - mp->pages_nr = 0; - mp->need_flush = 0; - } - -} - #ifdef CONFIG_SMP extern void smp_flush_tlb_mm(struct mm_struct *mm); #define do_flush_tlb_mm(mm) smp_flush_tlb_mm(mm) @@ -74,38 +19,14 @@ extern void smp_flush_tlb_mm(struct mm_struct *mm); #define do_flush_tlb_mm(mm) __flush_tlb_mm(CTX_HWBITS(mm->context), SECONDARY_CONTEXT) #endif -static inline void tlb_finish_mmu(struct mmu_gather *mp, unsigned long start, unsigned long end) -{ - tlb_flush_mmu(mp); - - if (mp->fullmm) - mp->fullmm = 0; - - /* keep the page table cache within bounds */ - check_pgt_cache(); - - put_cpu_var(mmu_gathers); -} - -static inline void tlb_remove_page(struct mmu_gather *mp, struct page *page) -{ - if (tlb_fast_mode(mp)) { - free_page_and_swap_cache(page); - return; - } - mp->need_flush = 1; - mp->pages[mp->pages_nr++] = page; - if (mp->pages_nr >= FREE_PTE_NR) - tlb_flush_mmu(mp); -} - -#define tlb_remove_tlb_entry(mp,ptep,addr) do { } while (0) -#define pte_free_tlb(mp, ptepage, addr) pte_free((mp)->mm, ptepage) -#define pmd_free_tlb(mp, pmdp, addr) pmd_free((mp)->mm, pmdp) -#define pud_free_tlb(tlb,pudp, addr) __pud_free_tlb(tlb,pudp,addr) +extern void __flush_tlb_pending(unsigned long, unsigned long, unsigned long *); +extern void flush_tlb_pending(void); -#define tlb_migrate_finish(mm) do { } while (0) #define tlb_start_vma(tlb, vma) do { } while (0) #define tlb_end_vma(tlb, vma) do { } while (0) +#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0) +#define tlb_flush(tlb) flush_tlb_pending() + +#include #endif /* _SPARC64_TLB_H */ diff --git a/arch/sparc/include/asm/tlbflush_64.h b/arch/sparc/include/asm/tlbflush_64.h index fbb675dbe0c9..2ef463494153 100644 --- a/arch/sparc/include/asm/tlbflush_64.h +++ b/arch/sparc/include/asm/tlbflush_64.h @@ -5,9 +5,17 @@ #include /* TSB flush operations. */ -struct mmu_gather; + +#define TLB_BATCH_NR 192 + +struct tlb_batch { + struct mm_struct *mm; + unsigned long tlb_nr; + unsigned long vaddrs[TLB_BATCH_NR]; +}; + extern void flush_tsb_kernel_range(unsigned long start, unsigned long end); -extern void flush_tsb_user(struct mmu_gather *mp); +extern void flush_tsb_user(struct tlb_batch *tb); /* TLB flush operations. */ diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c index d8f21e24a82f..b1f279cd00bf 100644 --- a/arch/sparc/mm/tlb.c +++ b/arch/sparc/mm/tlb.c @@ -19,33 +19,34 @@ /* Heavily inspired by the ppc64 code. */ -DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); +static DEFINE_PER_CPU(struct tlb_batch, tlb_batch); void flush_tlb_pending(void) { - struct mmu_gather *mp = &get_cpu_var(mmu_gathers); + struct tlb_batch *tb = &get_cpu_var(tlb_batch); - if (mp->tlb_nr) { - flush_tsb_user(mp); + if (tb->tlb_nr) { + flush_tsb_user(tb); - if (CTX_VALID(mp->mm->context)) { + if (CTX_VALID(tb->mm->context)) { #ifdef CONFIG_SMP - smp_flush_tlb_pending(mp->mm, mp->tlb_nr, - &mp->vaddrs[0]); + smp_flush_tlb_pending(tb->mm, tb->tlb_nr, + &tb->vaddrs[0]); #else - __flush_tlb_pending(CTX_HWBITS(mp->mm->context), - mp->tlb_nr, &mp->vaddrs[0]); + __flush_tlb_pending(CTX_HWBITS(tb->mm->context), + tb->tlb_nr, &tb->vaddrs[0]); #endif } - mp->tlb_nr = 0; + tb->tlb_nr = 0; } - put_cpu_var(mmu_gathers); + put_cpu_var(tlb_batch); } -void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t orig) +void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, + pte_t *ptep, pte_t orig, int fullmm) { - struct mmu_gather *mp = &__get_cpu_var(mmu_gathers); + struct tlb_batch *tb = &get_cpu_var(tlb_batch); unsigned long nr; vaddr &= PAGE_MASK; @@ -77,21 +78,25 @@ void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr, pte_t *ptep, pte_t no_cache_flush: - if (mp->fullmm) + if (fullmm) { + put_cpu_var(tlb_batch); return; + } - nr = mp->tlb_nr; + nr = tb->tlb_nr; - if (unlikely(nr != 0 && mm != mp->mm)) { + if (unlikely(nr != 0 && mm != tb->mm)) { flush_tlb_pending(); nr = 0; } if (nr == 0) - mp->mm = mm; + tb->mm = mm; - mp->vaddrs[nr] = vaddr; - mp->tlb_nr = ++nr; + tb->vaddrs[nr] = vaddr; + tb->tlb_nr = ++nr; if (nr >= TLB_BATCH_NR) flush_tlb_pending(); + + put_cpu_var(tlb_batch); } diff --git a/arch/sparc/mm/tsb.c b/arch/sparc/mm/tsb.c index 101d7c82870b..948461513499 100644 --- a/arch/sparc/mm/tsb.c +++ b/arch/sparc/mm/tsb.c @@ -47,12 +47,13 @@ void flush_tsb_kernel_range(unsigned long start, unsigned long end) } } -static void __flush_tsb_one(struct mmu_gather *mp, unsigned long hash_shift, unsigned long tsb, unsigned long nentries) +static void __flush_tsb_one(struct tlb_batch *tb, unsigned long hash_shift, + unsigned long tsb, unsigned long nentries) { unsigned long i; - for (i = 0; i < mp->tlb_nr; i++) { - unsigned long v = mp->vaddrs[i]; + for (i = 0; i < tb->tlb_nr; i++) { + unsigned long v = tb->vaddrs[i]; unsigned long tag, ent, hash; v &= ~0x1UL; @@ -65,9 +66,9 @@ static void __flush_tsb_one(struct mmu_gather *mp, unsigned long hash_shift, uns } } -void flush_tsb_user(struct mmu_gather *mp) +void flush_tsb_user(struct tlb_batch *tb) { - struct mm_struct *mm = mp->mm; + struct mm_struct *mm = tb->mm; unsigned long nentries, base, flags; spin_lock_irqsave(&mm->context.lock, flags); @@ -76,7 +77,7 @@ void flush_tsb_user(struct mmu_gather *mp) nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries; if (tlb_type == cheetah_plus || tlb_type == hypervisor) base = __pa(base); - __flush_tsb_one(mp, PAGE_SHIFT, base, nentries); + __flush_tsb_one(tb, PAGE_SHIFT, base, nentries); #ifdef CONFIG_HUGETLB_PAGE if (mm->context.tsb_block[MM_TSB_HUGE].tsb) { @@ -84,7 +85,7 @@ void flush_tsb_user(struct mmu_gather *mp) nentries = mm->context.tsb_block[MM_TSB_HUGE].tsb_nentries; if (tlb_type == cheetah_plus || tlb_type == hypervisor) base = __pa(base); - __flush_tsb_one(mp, HPAGE_SHIFT, base, nentries); + __flush_tsb_one(tb, HPAGE_SHIFT, base, nentries); } #endif spin_unlock_irqrestore(&mm->context.lock, flags);