1 // SPDX-License-Identifier: GPL-2.0
2 /* arch/sparc64/mm/tlb.c
9 #include <linux/mm.h>
25 	struct mm_struct *mm = tb->mm;  in flush_tlb_pending()  local
27 	if (!tb->tlb_nr)  in flush_tlb_pending()
32 	if (CTX_VALID(mm->context)) {  in flush_tlb_pending()
33 		if (tb->tlb_nr == 1) {  in flush_tlb_pending()
34 			global_flush_tlb_page(mm, tb->vaddrs[0]);  in flush_tlb_pending()
37 			smp_flush_tlb_pending(tb->mm, tb->tlb_nr,  in flush_tlb_pending()
38 					      &tb->vaddrs[0]);  in flush_tlb_pending()
40 			__flush_tlb_pending(CTX_HWBITS(tb->mm->context),  in flush_tlb_pending()
41 					    tb->tlb_nr, &tb->vaddrs[0]);  in flush_tlb_pending()
46 	tb->tlb_nr = 0;  in flush_tlb_pending()
56 	tb->active = 1;  in arch_enter_lazy_mmu_mode()
63 	if (tb->tlb_nr)  in arch_leave_lazy_mmu_mode()
65 	tb->active = 0;  in arch_leave_lazy_mmu_mode()
68 static void tlb_batch_add_one(struct mm_struct *mm, unsigned long vaddr,  in tlb_batch_add_one()  argument
76 		vaddr |= 0x1UL;  in tlb_batch_add_one()
78 	nr = tb->tlb_nr;  in tlb_batch_add_one()
80 	if (unlikely(nr != 0 && mm != tb->mm)) {  in tlb_batch_add_one()
82 		nr = 0;  in tlb_batch_add_one()
85 	if (!tb->active) {  in tlb_batch_add_one()
86 		flush_tsb_user_page(mm, vaddr, hugepage_shift);  in tlb_batch_add_one()
87 		global_flush_tlb_page(mm, vaddr);  in tlb_batch_add_one()
91 	if (nr == 0) {  in tlb_batch_add_one()
92 		tb->mm = mm;  in tlb_batch_add_one()
93 		tb->hugepage_shift = hugepage_shift;  in tlb_batch_add_one()
96 	if (tb->hugepage_shift != hugepage_shift) {  in tlb_batch_add_one()
98 		tb->hugepage_shift = hugepage_shift;  in tlb_batch_add_one()
99 		nr = 0;  in tlb_batch_add_one()
102 	tb->vaddrs[nr] = vaddr;  in tlb_batch_add_one()
103 	tb->tlb_nr = ++nr;  in tlb_batch_add_one()
111 void tlb_batch_add(struct mm_struct *mm, unsigned long vaddr,  in tlb_batch_add()  argument
135 			flush_dcache_page_all(mm, page);  in tlb_batch_add()
140 		tlb_batch_add_one(mm, vaddr, pte_exec(orig), hugepage_shift);  in tlb_batch_add()
144 static void tlb_batch_pmd_scan(struct mm_struct *mm, unsigned long vaddr,  in tlb_batch_pmd_scan()  argument
156 			tlb_batch_add_one(mm, vaddr, exec, PAGE_SHIFT);  in tlb_batch_pmd_scan()
165 static void __set_pmd_acct(struct mm_struct *mm, unsigned long addr,  in __set_pmd_acct()  argument
168 	if (mm == &init_mm)  in __set_pmd_acct()
182 				mm->context.hugetlb_pte_count++;  in __set_pmd_acct()
184 				mm->context.thp_pte_count++;  in __set_pmd_acct()
187 				mm->context.hugetlb_pte_count--;  in __set_pmd_acct()
189 				mm->context.thp_pte_count--;  in __set_pmd_acct()
208 			tlb_batch_add_one(mm, addr, exec, REAL_HPAGE_SHIFT);  in __set_pmd_acct()
209 			tlb_batch_add_one(mm, addr + REAL_HPAGE_SIZE, exec,  in __set_pmd_acct()
212 			tlb_batch_pmd_scan(mm, addr, orig);  in __set_pmd_acct()
217 void set_pmd_at(struct mm_struct *mm, unsigned long addr,  in set_pmd_at()  argument
223 	__set_pmd_acct(mm, addr, orig, pmd);  in set_pmd_at()
233 	} while (cmpxchg64(&pmdp->pmd, old.pmd, pmd.pmd) != old.pmd);  in pmdp_establish()
234 	__set_pmd_acct(vma->vm_mm, address, old, pmd);  in pmdp_establish()
258 		(vma->vm_mm)->context.thp_pte_count--;  in pmdp_invalidate()
263 void pgtable_trans_huge_deposit(struct mm_struct *mm, pmd_t *pmdp,  in pgtable_trans_huge_deposit()  argument
268 	assert_spin_locked(&mm->page_table_lock);  in pgtable_trans_huge_deposit()
271 	if (!pmd_huge_pte(mm, pmdp))  in pgtable_trans_huge_deposit()
274 		list_add(lh, (struct list_head *) pmd_huge_pte(mm, pmdp));  in pgtable_trans_huge_deposit()
275 	pmd_huge_pte(mm, pmdp) = pgtable;  in pgtable_trans_huge_deposit()
278 pgtable_t pgtable_trans_huge_withdraw(struct mm_struct *mm, pmd_t *pmdp)  in pgtable_trans_huge_withdraw()  argument
283 	assert_spin_locked(&mm->page_table_lock);  in pgtable_trans_huge_withdraw()
286 	pgtable = pmd_huge_pte(mm, pmdp);  in pgtable_trans_huge_withdraw()
289 		pmd_huge_pte(mm, pmdp) = NULL;  in pgtable_trans_huge_withdraw()
291 		pmd_huge_pte(mm, pmdp) = (pgtable_t) lh->next;  in pgtable_trans_huge_withdraw()
294 	pte_val(pgtable[0]) = 0;  in pgtable_trans_huge_withdraw()
295 	pte_val(pgtable[1]) = 0;  in pgtable_trans_huge_withdraw()