1 // SPDX-License-Identifier: GPL-2.0-only
2 // Copyright 2024 Google LLC
3 // Author: Ard Biesheuvel <ardb@google.com>
4
5 #include <linux/types.h>
6 #include <asm/tlbflush.h>
7
8 #ifdef CONFIG_CPU_TLB_V4WT
9 void v4_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
10 void v4_flush_kern_tlb_range(unsigned long, unsigned long);
11
12 struct cpu_tlb_fns v4_tlb_fns __initconst = {
13 .flush_user_range = v4_flush_user_tlb_range,
14 .flush_kern_range = v4_flush_kern_tlb_range,
15 .tlb_flags = v4_tlb_flags,
16 };
17 #endif
18
19 #ifdef CONFIG_CPU_TLB_V4WB
20 void v4wb_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
21 void v4wb_flush_kern_tlb_range(unsigned long, unsigned long);
22
23 struct cpu_tlb_fns v4wb_tlb_fns __initconst = {
24 .flush_user_range = v4wb_flush_user_tlb_range,
25 .flush_kern_range = v4wb_flush_kern_tlb_range,
26 .tlb_flags = v4wb_tlb_flags,
27 };
28 #endif
29
30 #if defined(CONFIG_CPU_TLB_V4WBI) || defined(CONFIG_CPU_TLB_FEROCEON)
31 void v4wbi_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
32 void v4wbi_flush_kern_tlb_range(unsigned long, unsigned long);
33
34 struct cpu_tlb_fns v4wbi_tlb_fns __initconst = {
35 .flush_user_range = v4wbi_flush_user_tlb_range,
36 .flush_kern_range = v4wbi_flush_kern_tlb_range,
37 .tlb_flags = v4wbi_tlb_flags,
38 };
39 #endif
40
41 #ifdef CONFIG_CPU_TLB_V6
42 void v6wbi_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
43 void v6wbi_flush_kern_tlb_range(unsigned long, unsigned long);
44
45 struct cpu_tlb_fns v6wbi_tlb_fns __initconst = {
46 .flush_user_range = v6wbi_flush_user_tlb_range,
47 .flush_kern_range = v6wbi_flush_kern_tlb_range,
48 .tlb_flags = v6wbi_tlb_flags,
49 };
50 #endif
51
52 #ifdef CONFIG_CPU_TLB_V7
53 void v7wbi_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
54 void v7wbi_flush_kern_tlb_range(unsigned long, unsigned long);
55
56 struct cpu_tlb_fns v7wbi_tlb_fns __initconst = {
57 .flush_user_range = v7wbi_flush_user_tlb_range,
58 .flush_kern_range = v7wbi_flush_kern_tlb_range,
59 .tlb_flags = IS_ENABLED(CONFIG_SMP) ? v7wbi_tlb_flags_smp
60 : v7wbi_tlb_flags_up,
61 };
62
63 #ifdef CONFIG_SMP_ON_UP
64 /* This will be run-time patched so the offset better be right */
65 static_assert(offsetof(struct cpu_tlb_fns, tlb_flags) == 8);
66
67 asm(" .pushsection \".alt.smp.init\", \"a\" \n" \
68 " .align 2 \n" \
69 " .long v7wbi_tlb_fns + 8 - . \n" \
70 " .long " __stringify(v7wbi_tlb_flags_up) " \n" \
71 " .popsection \n");
72 #endif
73 #endif
74
75 #ifdef CONFIG_CPU_TLB_FA
76 void fa_flush_user_tlb_range(unsigned long, unsigned long, struct vm_area_struct *);
77 void fa_flush_kern_tlb_range(unsigned long, unsigned long);
78
79 struct cpu_tlb_fns fa_tlb_fns __initconst = {
80 .flush_user_range = fa_flush_user_tlb_range,
81 .flush_kern_range = fa_flush_kern_tlb_range,
82 .tlb_flags = fa_tlb_flags,
83 };
84 #endif
85
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