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 /* Get the generic bits... */
41 #include <asm-generic/tlb.h>
42
43 static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
44 unsigned long address)
45 {
46 #ifdef CONFIG_PPC_BOOK3S_32
47 if (pte_val(*ptep) & _PAGE_HASHPTE)
48 flush_hash_entry(tlb->mm, ptep, address);
49 #endif
50 }
51
52 #ifdef CONFIG_SMP
53 static inline int mm_is_core_local(struct mm_struct *mm)
54 {
55 return cpumask_subset(mm_cpumask(mm),
56 topology_sibling_cpumask(smp_processor_id()));
57 }
58
59 #ifdef CONFIG_PPC_BOOK3S_64
60 static inline int mm_is_thread_local(struct mm_struct *mm)
61 {
62 if (atomic_read(&mm->context.active_cpus) > 1)
63 return false;
64 return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
65 }
66 #else /* CONFIG_PPC_BOOK3S_64 */
67 static inline int mm_is_thread_local(struct mm_struct *mm)
68 {
69 return cpumask_equal(mm_cpumask(mm),
70 cpumask_of(smp_processor_id()));
71 }
72 #endif /* !CONFIG_PPC_BOOK3S_64 */
73
74 #else /* CONFIG_SMP */
75 static inline int mm_is_core_local(struct mm_struct *mm)
76 {
77 return 1;
78 }
79
80 static inline int mm_is_thread_local(struct mm_struct *mm)
81 {
82 return 1;
83 }
84 #endif
85
86 #define arch_supports_page_table_move arch_supports_page_table_move
87 static inline bool arch_supports_page_table_move(void)
88 {
89 return radix_enabled();
90 }
91
92 #endif /* __KERNEL__ */
93 #endif /* __ASM_POWERPC_TLB_H */
94
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