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
25extern 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
41static 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
51static 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
58static 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 */
65static 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 */
73static inline int mm_is_core_local(struct mm_struct *mm)
74{
75	return 1;
76}
77
78static 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
85static 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