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/* Get the generic bits... */
41#include <asm-generic/tlb.h>
42
 
 
 
43static 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
53static 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
60static 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 */
67static 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 */
75static inline int mm_is_core_local(struct mm_struct *mm)
76{
77	return 1;
78}
79
80static 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
87static inline bool arch_supports_page_table_move(void)
88{
89	return radix_enabled();
90}
91
92#endif /* __KERNEL__ */
93#endif /* __ASM_POWERPC_TLB_H */

 
  1/*
  2 *	TLB shootdown specifics for powerpc
  3 *
  4 * Copyright (C) 2002 Anton Blanchard, IBM Corp.
  5 * Copyright (C) 2002 Paul Mackerras, IBM Corp.
  6 *
  7 * This program is free software; you can redistribute it and/or
  8 * modify it under the terms of the GNU General Public License
  9 * as published by the Free Software Foundation; either version
 10 * 2 of the License, or (at your option) any later version.
 11 */
 12#ifndef _ASM_POWERPC_TLB_H
 13#define _ASM_POWERPC_TLB_H
 14#ifdef __KERNEL__
 15
 16#ifndef __powerpc64__
 17#include <asm/pgtable.h>
 18#endif
 19#include <asm/pgalloc.h>
 20#include <asm/tlbflush.h>
 21#ifndef __powerpc64__
 22#include <asm/page.h>
 23#include <asm/mmu.h>
 24#endif
 25
 26#include <linux/pagemap.h>
 27
 28#define tlb_start_vma(tlb, vma)	do { } while (0)
 29#define tlb_end_vma(tlb, vma)	do { } while (0)
 30#define __tlb_remove_tlb_entry	__tlb_remove_tlb_entry
 31#define tlb_remove_check_page_size_change tlb_remove_check_page_size_change
 32
 
 33extern void tlb_flush(struct mmu_gather *tlb);
 
 
 
 
 
 
 
 
 
 
 
 34
 35/* Get the generic bits... */
 36#include <asm-generic/tlb.h>
 37
 38extern void flush_hash_entry(struct mm_struct *mm, pte_t *ptep,
 39			     unsigned long address);
 40
 41static inline void __tlb_remove_tlb_entry(struct mmu_gather *tlb, pte_t *ptep,
 42					  unsigned long address)
 43{
 44#ifdef CONFIG_PPC_STD_MMU_32
 45	if (pte_val(*ptep) & _PAGE_HASHPTE)
 46		flush_hash_entry(tlb->mm, ptep, address);
 47#endif
 48}
 49
 50static inline void tlb_remove_check_page_size_change(struct mmu_gather *tlb,
 51						     unsigned int page_size)
 52{
 53	if (!tlb->page_size)
 54		tlb->page_size = page_size;
 55	else if (tlb->page_size != page_size) {
 56		tlb_flush_mmu(tlb);
 57		/*
 58		 * update the page size after flush for the new
 59		 * mmu_gather.
 60		 */
 61		tlb->page_size = page_size;
 62	}
 63}
 64
 65#ifdef CONFIG_SMP
 66static inline int mm_is_core_local(struct mm_struct *mm)
 67{
 68	return cpumask_subset(mm_cpumask(mm),
 69			      topology_sibling_cpumask(smp_processor_id()));
 70}
 71
 72#ifdef CONFIG_PPC_BOOK3S_64
 73static inline int mm_is_thread_local(struct mm_struct *mm)
 74{
 75	if (atomic_read(&mm->context.active_cpus) > 1)
 76		return false;
 77	return cpumask_test_cpu(smp_processor_id(), mm_cpumask(mm));
 78}
 79#else /* CONFIG_PPC_BOOK3S_64 */
 80static inline int mm_is_thread_local(struct mm_struct *mm)
 81{
 82	return cpumask_equal(mm_cpumask(mm),
 83			      cpumask_of(smp_processor_id()));
 84}
 85#endif /* !CONFIG_PPC_BOOK3S_64 */
 86
 87#else /* CONFIG_SMP */
 88static inline int mm_is_core_local(struct mm_struct *mm)
 89{
 90	return 1;
 91}
 92
 93static inline int mm_is_thread_local(struct mm_struct *mm)
 94{
 95	return 1;
 96}
 97#endif
 
 
 
 
 
 
 98
 99#endif /* __KERNEL__ */
100#endif /* __ASM_POWERPC_TLB_H */