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 <asm/pgtable.h> 14 #endif 15 #include <asm/pgalloc.h> 16 #ifndef __powerpc64__ 17 #include <asm/page.h> 18 #include <asm/mmu.h> 19 #endif 20 21 #include <linux/pagemap.h> 22 23 #define tlb_start_vma(tlb, vma) do { } while (0) 24 #define tlb_end_vma(tlb, vma) do { } while (0) 25 #define __tlb_remove_tlb_entry __tlb_remove_tlb_entry 26 27 #define tlb_flush tlb_flush 28 extern void tlb_flush(struct mmu_gather *tlb); 29 30 /* Get the generic bits... */ 31 #include <asm-generic/tlb.h> 32 33 extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep, 34 unsigned long address); 35 36 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep, 37 unsigned long address) 38 { 39 #ifdef CONFIG_PPC_BOOK3S_32 40 if (pte_val(*ptep) & _PAGE_HASHPTE) 41 flush_hash_entry(tlb->mm, ptep, address); 42 #endif 43 } 44 45 #ifdef CONFIG_SMP 46 static inline int mm_is_core_local(struct mm_struct *mm) 47 { 48 return cpumask_subset(mm_cpumask(mm), 49 topology_sibling_cpumask(smp_processor_id())); 50 } 51 52 #ifdef CONFIG_PPC_BOOK3S_64 53 static inline int mm_is_thread_local(struct mm_struct *mm) 54 { 55 if (atomic_read(&mm->context.active_cpus) > 1) 56 return false; 57 return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm)); 58 } 59 static inline void mm_reset_thread_local(struct mm_struct *mm) 60 { 61 WARN_ON(atomic_read(&mm->context.copros) > 0); 62 /* 63 * It's possible for mm_access to take a reference on mm_users to 64 * access the remote mm from another thread, but it's not allowed 65 * to set mm_cpumask, so mm_users may be > 1 here. 66 */ 67 WARN_ON(current->mm != mm); 68 atomic_set(&mm->context.active_cpus, 1); 69 cpumask_clear(mm_cpumask(mm)); 70 cpumask_set_cpu(smp_processor_id(), mm_cpumask(mm)); 71 } 72 #else /* CONFIG_PPC_BOOK3S_64 */ 73 static inline int mm_is_thread_local(struct mm_struct *mm) 74 { 75 return cpumask_equal(mm_cpumask(mm), 76 cpumask_of(smp_processor_id())); 77 } 78 #endif /* !CONFIG_PPC_BOOK3S_64 */ 79 80 #else /* CONFIG_SMP */ 81 static inline int mm_is_core_local(struct mm_struct *mm) 82 { 83 return 1; 84 } 85 86 static inline int mm_is_thread_local(struct mm_struct *mm) 87 { 88 return 1; 89 } 90 #endif 91 92 #endif /* __KERNEL__ */ 93 #endif /* __ASM_POWERPC_TLB_H */ 94