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 #define __tlb_remove_tlb_entry __tlb_remove_tlb_entry 23 24 #define tlb_flush tlb_flush 25 extern void tlb_flush(struct mmu_gather *tlb); 26 /* 27 * book3s: 28 * Hash does not use the linux page-tables, so we can avoid 29 * the TLB invalidate for page-table freeing, Radix otoh does use the 30 * page-tables and needs the TLBI. 31 * 32 * nohash: 33 * We still do TLB invalidate in the __pte_free_tlb routine before we 34 * add the page table pages to mmu gather table batch. 35 */ 36 #define tlb_needs_table_invalidate() radix_enabled() 37 38 /* Get the generic bits... */ 39 #include <asm-generic/tlb.h> 40 41 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, 42 unsigned long address) 43 { 44 #ifdef CONFIG_PPC_BOOK3S_32 45 if (pte_val(*ptep) & _PAGE_HASHPTE) 46 flush_hash_entry(tlb->mm, ptep, address); 47 #endif 48 } 49 50 #ifdef CONFIG_SMP 51 static inline int mm_is_core_local(struct mm_struct *mm) 52 { 53 return cpumask_subset(mm_cpumask(mm), 54 topology_sibling_cpumask(smp_processor_id())); 55 } 56 57 #ifdef CONFIG_PPC_BOOK3S_64 58 static inline int mm_is_thread_local(struct mm_struct *mm) 59 { 60 if (atomic_read(&mm->context.active_cpus) > 1) 61 return false; 62 return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)); 63 } 64 #else /* CONFIG_PPC_BOOK3S_64 */ 65 static inline int mm_is_thread_local(struct mm_struct *mm) 66 { 67 return cpumask_equal(mm_cpumask(mm), 68 cpumask_of(smp_processor_id())); 69 } 70 #endif /* !CONFIG_PPC_BOOK3S_64 */ 71 72 #else /* CONFIG_SMP */ 73 static inline int mm_is_core_local(struct mm_struct *mm) 74 { 75 return 1; 76 } 77 78 static inline int mm_is_thread_local(struct mm_struct *mm) 79 { 80 return 1; 81 } 82 #endif 83 84 #define arch_supports_page_table_move arch_supports_page_table_move 85 static inline bool arch_supports_page_table_move(void) 86 { 87 return radix_enabled(); 88 } 89 90 #endif /* __KERNEL__ */ 91 #endif /* __ASM_POWERPC_TLB_H */ 92