1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * TLB shootdown specifics for powerpc 4 * 5 * Copyright (C) 2002 Anton Blanchard, IBM Corp. 6 * Copyright (C) 2002 Paul Mackerras, IBM Corp. 7 */ 8 #ifndef _ASM_POWERPC_TLB_H 9 #define _ASM_POWERPC_TLB_H 10 #ifdef __KERNEL__ 11 12 #ifndef __powerpc64__ 13 #include <linux/pgtable.h> 14 #endif 15 #ifndef __powerpc64__ 16 #include <asm/page.h> 17 #include <asm/mmu.h> 18 #endif 19 20 #include <linux/pagemap.h> 21 22 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, 23 unsigned long address); 24 #define __tlb_remove_tlb_entry __tlb_remove_tlb_entry 25 26 #define tlb_flush tlb_flush 27 extern void tlb_flush(struct mmu_gather *tlb); 28 /* 29 * book3s: 30 * Hash does not use the linux page-tables, so we can avoid 31 * the TLB invalidate for page-table freeing, Radix otoh does use the 32 * page-tables and needs the TLBI. 33 * 34 * nohash: 35 * We still do TLB invalidate in the __pte_free_tlb routine before we 36 * add the page table pages to mmu gather table batch. 37 */ 38 #define tlb_needs_table_invalidate() radix_enabled() 39 40 #define __HAVE_ARCH_TLB_REMOVE_TABLE 41 /* Get the generic bits... */ 42 #include <asm-generic/tlb.h> 43 44 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, 45 unsigned long address) 46 { 47 #ifdef CONFIG_PPC_BOOK3S_32 48 if (pte_val(*ptep) & _PAGE_HASHPTE) 49 flush_hash_entry(tlb->mm, ptep, address); 50 #endif 51 } 52 53 #ifdef CONFIG_SMP 54 static inline int mm_is_core_local(struct mm_struct *mm) 55 { 56 return cpumask_subset(mm_cpumask(mm), 57 topology_sibling_cpumask(smp_processor_id())); 58 } 59 60 #ifdef CONFIG_PPC_BOOK3S_64 61 static inline int mm_is_thread_local(struct mm_struct *mm) 62 { 63 if (atomic_read(&mm->context.active_cpus) > 1) 64 return false; 65 return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)); 66 } 67 #else /* CONFIG_PPC_BOOK3S_64 */ 68 static inline int mm_is_thread_local(struct mm_struct *mm) 69 { 70 return cpumask_equal(mm_cpumask(mm), 71 cpumask_of(smp_processor_id())); 72 } 73 #endif /* !CONFIG_PPC_BOOK3S_64 */ 74 75 #else /* CONFIG_SMP */ 76 static inline int mm_is_core_local(struct mm_struct *mm) 77 { 78 return 1; 79 } 80 81 static inline int mm_is_thread_local(struct mm_struct *mm) 82 { 83 return 1; 84 } 85 #endif 86 87 #define arch_supports_page_table_move arch_supports_page_table_move 88 static inline bool arch_supports_page_table_move(void) 89 { 90 return radix_enabled(); 91 } 92 93 #endif /* __KERNEL__ */ 94 #endif /* __ASM_POWERPC_TLB_H */ 95