1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
3 #define _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H
4
5 /*
6 * TLB flushing for 64-bit hash-MMU CPUs
7 */
8
9 #include <linux/percpu.h>
10 #include <asm/page.h>
11
12 #define PPC64_TLB_BATCH_NR 192
13
14 struct ppc64_tlb_batch {
15 int active;
16 unsigned long index;
17 struct mm_struct *mm;
18 real_pte_t pte[PPC64_TLB_BATCH_NR];
19 unsigned long vpn[PPC64_TLB_BATCH_NR];
20 unsigned int psize;
21 int ssize;
22 };
23 DECLARE_PER_CPU(struct ppc64_tlb_batch, ppc64_tlb_batch);
24
25 extern void __flush_tlb_pending(struct ppc64_tlb_batch *batch);
26
27 #define __HAVE_ARCH_ENTER_LAZY_MMU_MODE
28
arch_enter_lazy_mmu_mode(void)29 static inline void arch_enter_lazy_mmu_mode(void)
30 {
31 struct ppc64_tlb_batch *batch;
32
33 if (radix_enabled())
34 return;
35 /*
36 * apply_to_page_range can call us this preempt enabled when
37 * operating on kernel page tables.
38 */
39 preempt_disable();
40 batch = this_cpu_ptr(&ppc64_tlb_batch);
41 batch->active = 1;
42 }
43
arch_leave_lazy_mmu_mode(void)44 static inline void arch_leave_lazy_mmu_mode(void)
45 {
46 struct ppc64_tlb_batch *batch;
47
48 if (radix_enabled())
49 return;
50 batch = this_cpu_ptr(&ppc64_tlb_batch);
51
52 if (batch->index)
53 __flush_tlb_pending(batch);
54 batch->active = 0;
55 preempt_enable();
56 }
57
58 #define arch_flush_lazy_mmu_mode() do {} while (0)
59
60 extern void hash__tlbiel_all(unsigned int action);
61
62 extern void flush_hash_page(unsigned long vpn, real_pte_t pte, int psize,
63 int ssize, unsigned long flags);
64 extern void flush_hash_range(unsigned long number, int local);
65 extern void flush_hash_hugepage(unsigned long vsid, unsigned long addr,
66 pmd_t *pmdp, unsigned int psize, int ssize,
67 unsigned long flags);
hash__local_flush_tlb_mm(struct mm_struct * mm)68 static inline void hash__local_flush_tlb_mm(struct mm_struct *mm)
69 {
70 }
71
hash__flush_tlb_mm(struct mm_struct * mm)72 static inline void hash__flush_tlb_mm(struct mm_struct *mm)
73 {
74 }
75
hash__local_flush_all_mm(struct mm_struct * mm)76 static inline void hash__local_flush_all_mm(struct mm_struct *mm)
77 {
78 /*
79 * There's no Page Walk Cache for hash, so what is needed is
80 * the same as flush_tlb_mm(), which doesn't really make sense
81 * with hash. So the only thing we could do is flush the
82 * entire LPID! Punt for now, as it's not being used.
83 */
84 WARN_ON_ONCE(1);
85 }
86
hash__flush_all_mm(struct mm_struct * mm)87 static inline void hash__flush_all_mm(struct mm_struct *mm)
88 {
89 /*
90 * There's no Page Walk Cache for hash, so what is needed is
91 * the same as flush_tlb_mm(), which doesn't really make sense
92 * with hash. So the only thing we could do is flush the
93 * entire LPID! Punt for now, as it's not being used.
94 */
95 WARN_ON_ONCE(1);
96 }
97
hash__local_flush_tlb_page(struct vm_area_struct * vma,unsigned long vmaddr)98 static inline void hash__local_flush_tlb_page(struct vm_area_struct *vma,
99 unsigned long vmaddr)
100 {
101 }
102
hash__flush_tlb_page(struct vm_area_struct * vma,unsigned long vmaddr)103 static inline void hash__flush_tlb_page(struct vm_area_struct *vma,
104 unsigned long vmaddr)
105 {
106 }
107
hash__flush_tlb_range(struct vm_area_struct * vma,unsigned long start,unsigned long end)108 static inline void hash__flush_tlb_range(struct vm_area_struct *vma,
109 unsigned long start, unsigned long end)
110 {
111 }
112
hash__flush_tlb_kernel_range(unsigned long start,unsigned long end)113 static inline void hash__flush_tlb_kernel_range(unsigned long start,
114 unsigned long end)
115 {
116 }
117
118
119 struct mmu_gather;
120 extern void hash__tlb_flush(struct mmu_gather *tlb);
121
122 #ifdef CONFIG_PPC_64S_HASH_MMU
123 /* Private function for use by PCI IO mapping code */
124 extern void __flush_hash_table_range(unsigned long start, unsigned long end);
125 void flush_hash_table_pmd_range(struct mm_struct *mm, pmd_t *pmd, unsigned long addr);
126 #else
__flush_hash_table_range(unsigned long start,unsigned long end)127 static inline void __flush_hash_table_range(unsigned long start, unsigned long end) { }
128 #endif
129 #endif /* _ASM_POWERPC_BOOK3S_64_TLBFLUSH_HASH_H */
130