--- zzzz-none-000/linux-3.10.107/arch/sparc/mm/tsb.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/arch/sparc/mm/tsb.c 2021-02-04 17:41:59.000000000 +0000 @@ -9,6 +9,7 @@ #include #include #include +#include #include #include #include @@ -26,6 +27,20 @@ return (tag == (vaddr >> 22)); } +static void flush_tsb_kernel_range_scan(unsigned long start, unsigned long end) +{ + unsigned long idx; + + for (idx = 0; idx < KERNEL_TSB_NENTRIES; idx++) { + struct tsb *ent = &swapper_tsb[idx]; + unsigned long match = idx << 13; + + match |= (ent->tag << 22); + if (match >= start && match < end) + ent->tag = (1UL << TSB_TAG_INVALID_BIT); + } +} + /* TSB flushes need only occur on the processor initiating the address * space modification, not on each cpu the address space has run on. * Only the TLB flush needs that treatment. @@ -35,6 +50,9 @@ { unsigned long v; + if ((end - start) >> PAGE_SHIFT >= 2 * KERNEL_TSB_NENTRIES) + return flush_tsb_kernel_range_scan(start, end); + for (v = start; v < end; v += PAGE_SIZE) { unsigned long hash = tsb_hash(v, PAGE_SHIFT, KERNEL_TSB_NENTRIES); @@ -75,43 +93,45 @@ spin_lock_irqsave(&mm->context.lock, flags); - base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb; - nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries; - if (tlb_type == cheetah_plus || tlb_type == hypervisor) - base = __pa(base); - __flush_tsb_one(tb, PAGE_SHIFT, base, nentries); - + if (!tb->huge) { + base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb; + nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries; + if (tlb_type == cheetah_plus || tlb_type == hypervisor) + base = __pa(base); + __flush_tsb_one(tb, PAGE_SHIFT, base, nentries); + } #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) - if (mm->context.tsb_block[MM_TSB_HUGE].tsb) { + if (tb->huge && mm->context.tsb_block[MM_TSB_HUGE].tsb) { base = (unsigned long) mm->context.tsb_block[MM_TSB_HUGE].tsb; nentries = mm->context.tsb_block[MM_TSB_HUGE].tsb_nentries; if (tlb_type == cheetah_plus || tlb_type == hypervisor) base = __pa(base); - __flush_tsb_one(tb, HPAGE_SHIFT, base, nentries); + __flush_tsb_one(tb, REAL_HPAGE_SHIFT, base, nentries); } #endif spin_unlock_irqrestore(&mm->context.lock, flags); } -void flush_tsb_user_page(struct mm_struct *mm, unsigned long vaddr) +void flush_tsb_user_page(struct mm_struct *mm, unsigned long vaddr, bool huge) { unsigned long nentries, base, flags; spin_lock_irqsave(&mm->context.lock, flags); - base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb; - nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries; - if (tlb_type == cheetah_plus || tlb_type == hypervisor) - base = __pa(base); - __flush_tsb_one_entry(base, vaddr, PAGE_SHIFT, nentries); - + if (!huge) { + base = (unsigned long) mm->context.tsb_block[MM_TSB_BASE].tsb; + nentries = mm->context.tsb_block[MM_TSB_BASE].tsb_nentries; + if (tlb_type == cheetah_plus || tlb_type == hypervisor) + base = __pa(base); + __flush_tsb_one_entry(base, vaddr, PAGE_SHIFT, nentries); + } #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) - if (mm->context.tsb_block[MM_TSB_HUGE].tsb) { + if (huge && mm->context.tsb_block[MM_TSB_HUGE].tsb) { base = (unsigned long) mm->context.tsb_block[MM_TSB_HUGE].tsb; nentries = mm->context.tsb_block[MM_TSB_HUGE].tsb_nentries; if (tlb_type == cheetah_plus || tlb_type == hypervisor) base = __pa(base); - __flush_tsb_one_entry(base, vaddr, HPAGE_SHIFT, nentries); + __flush_tsb_one_entry(base, vaddr, REAL_HPAGE_SHIFT, nentries); } #endif spin_unlock_irqrestore(&mm->context.lock, flags); @@ -285,7 +305,7 @@ prom_halt(); } - for (i = 0; i < 8; i++) { + for (i = 0; i < ARRAY_SIZE(tsb_cache_names); i++) { unsigned long size = 8192 << i; const char *name = tsb_cache_names[i]; @@ -467,7 +487,7 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm) { #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) - unsigned long huge_pte_count; + unsigned long total_huge_pte_count; #endif unsigned int i; @@ -476,16 +496,16 @@ mm->context.sparc64_ctx_val = 0UL; #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) - /* We reset it to zero because the fork() page copying + /* We reset them to zero because the fork() page copying * will re-increment the counters as the parent PTEs are * copied into the child address space. */ - huge_pte_count = mm->context.huge_pte_count; - mm->context.huge_pte_count = 0; + total_huge_pte_count = mm->context.hugetlb_pte_count + + mm->context.thp_pte_count; + mm->context.hugetlb_pte_count = 0; + mm->context.thp_pte_count = 0; #endif - mm->context.pgtable_page = NULL; - /* copy_mm() copies over the parent's mm_struct before calling * us, so we need to zero out the TSB pointer or else tsb_grow() * will be confused and think there is an older TSB to free up. @@ -499,8 +519,8 @@ tsb_grow(mm, MM_TSB_BASE, get_mm_rss(mm)); #if defined(CONFIG_HUGETLB_PAGE) || defined(CONFIG_TRANSPARENT_HUGEPAGE) - if (unlikely(huge_pte_count)) - tsb_grow(mm, MM_TSB_HUGE, huge_pte_count); + if (unlikely(total_huge_pte_count)) + tsb_grow(mm, MM_TSB_HUGE, total_huge_pte_count); #endif if (unlikely(!mm->context.tsb_block[MM_TSB_BASE].tsb)) @@ -524,17 +544,10 @@ void destroy_context(struct mm_struct *mm) { unsigned long flags, i; - struct page *page; for (i = 0; i < MM_NUM_TSBS; i++) tsb_destroy_one(&mm->context.tsb_block[i]); - page = mm->context.pgtable_page; - if (page && put_page_testzero(page)) { - pgtable_page_dtor(page); - free_hot_cold_page(page, 0); - } - spin_lock_irqsave(&ctx_alloc_lock, flags); if (CTX_VALID(mm->context)) {