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_start_vma(tlb, vma)	do { } while (0)
23#define tlb_end_vma(tlb, vma)	do { } while (0)
24#define __tlb_remove_tlb_entry	__tlb_remove_tlb_entry
25
26#define tlb_flush tlb_flush
27extern 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
43extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
44			     unsigned long address);
45
46static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
47					  unsigned long address)
48{
49#ifdef CONFIG_PPC_BOOK3S_32
50	if (pte_val(*ptep) & _PAGE_HASHPTE)
51		flush_hash_entry(tlb->mm, ptep, address);
52#endif
53}
54
55#ifdef CONFIG_SMP
56static inline int mm_is_core_local(struct mm_struct *mm)
57{
58	return cpumask_subset(mm_cpumask(mm),
59			      topology_sibling_cpumask(smp_processor_id()));
60}
61
62#ifdef CONFIG_PPC_BOOK3S_64
63static inline int mm_is_thread_local(struct mm_struct *mm)
64{
65	if (atomic_read(&mm->context.active_cpus) > 1)
66		return false;
67	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
68}
69#else /* CONFIG_PPC_BOOK3S_64 */
70static inline int mm_is_thread_local(struct mm_struct *mm)
71{
72	return cpumask_equal(mm_cpumask(mm),
73			      cpumask_of(smp_processor_id()));
74}
75#endif /* !CONFIG_PPC_BOOK3S_64 */
76
77#else /* CONFIG_SMP */
78static inline int mm_is_core_local(struct mm_struct *mm)
79{
80	return 1;
81}
82
83static inline int mm_is_thread_local(struct mm_struct *mm)
84{
85	return 1;
86}
87#endif
88
89#endif /* __KERNEL__ */
90#endif /* __ASM_POWERPC_TLB_H */
91