tlb.h

 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
22static 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
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#define __HAVE_ARCH_TLB_REMOVE_TABLE
41/* Get the generic bits... */
42#include <asm-generic/tlb.h>
43
44static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
45					  unsigned long address)
46{
47#ifdef CONFIG_PPC_BOOK3S_32
48	if (pte_val(*ptep) & _PAGE_HASHPTE)
49		flush_hash_entry(tlb->mm, ptep, address);
50#endif
51}
52
53#ifdef CONFIG_SMP
54static inline int mm_is_core_local(struct mm_struct *mm)
55{
56	return cpumask_subset(mm_cpumask(mm),
57			      topology_sibling_cpumask(smp_processor_id()));
58}
59
60#ifdef CONFIG_PPC_BOOK3S_64
61static inline int mm_is_thread_local(struct mm_struct *mm)
62{
63	if (atomic_read(&mm->context.active_cpus) > 1)
64		return false;
65	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
66}
67#else /* CONFIG_PPC_BOOK3S_64 */
68static inline int mm_is_thread_local(struct mm_struct *mm)
69{
70	return cpumask_equal(mm_cpumask(mm),
71			      cpumask_of(smp_processor_id()));
72}
73#endif /* !CONFIG_PPC_BOOK3S_64 */
74
75#else /* CONFIG_SMP */
76static inline int mm_is_core_local(struct mm_struct *mm)
77{
78	return 1;
79}
80
81static inline int mm_is_thread_local(struct mm_struct *mm)
82{
83	return 1;
84}
85#endif
86
87#define arch_supports_page_table_move arch_supports_page_table_move
88static inline bool arch_supports_page_table_move(void)
89{
90	return radix_enabled();
91}
92
93#endif /* __KERNEL__ */
94#endif /* __ASM_POWERPC_TLB_H */