1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
|
// SPDX-License-Identifier: GPL-2.0
#include <linux/mm.h>
#include <linux/smp.h>
#include <linux/sched.h>
#include <asm/sbi.h>
#include <asm/mmu_context.h>
static inline void local_flush_tlb_all_asid(unsigned long asid)
{
__asm__ __volatile__ ("sfence.vma x0, %0"
:
: "r" (asid)
: "memory");
}
static inline void local_flush_tlb_page_asid(unsigned long addr,
unsigned long asid)
{
__asm__ __volatile__ ("sfence.vma %0, %1"
:
: "r" (addr), "r" (asid)
: "memory");
}
static inline void local_flush_tlb_range(unsigned long start,
unsigned long size, unsigned long stride)
{
if (size <= stride)
local_flush_tlb_page(start);
else
local_flush_tlb_all();
}
static inline void local_flush_tlb_range_asid(unsigned long start,
unsigned long size, unsigned long stride, unsigned long asid)
{
if (size <= stride)
local_flush_tlb_page_asid(start, asid);
else
local_flush_tlb_all_asid(asid);
}
static void __ipi_flush_tlb_all(void *info)
{
local_flush_tlb_all();
}
void flush_tlb_all(void)
{
if (riscv_use_ipi_for_rfence())
on_each_cpu(__ipi_flush_tlb_all, NULL, 1);
else
sbi_remote_sfence_vma(NULL, 0, -1);
}
struct flush_tlb_range_data {
unsigned long asid;
unsigned long start;
unsigned long size;
unsigned long stride;
};
static void __ipi_flush_tlb_range_asid(void *info)
{
struct flush_tlb_range_data *d = info;
local_flush_tlb_range_asid(d->start, d->size, d->stride, d->asid);
}
static void __ipi_flush_tlb_range(void *info)
{
struct flush_tlb_range_data *d = info;
local_flush_tlb_range(d->start, d->size, d->stride);
}
static void __flush_tlb_range(struct mm_struct *mm, unsigned long start,
unsigned long size, unsigned long stride)
{
struct flush_tlb_range_data ftd;
struct cpumask *cmask = mm_cpumask(mm);
unsigned int cpuid;
bool broadcast;
if (cpumask_empty(cmask))
return;
cpuid = get_cpu();
/* check if the tlbflush needs to be sent to other CPUs */
broadcast = cpumask_any_but(cmask, cpuid) < nr_cpu_ids;
if (static_branch_unlikely(&use_asid_allocator)) {
unsigned long asid = atomic_long_read(&mm->context.id) & asid_mask;
if (broadcast) {
if (riscv_use_ipi_for_rfence()) {
ftd.asid = asid;
ftd.start = start;
ftd.size = size;
ftd.stride = stride;
on_each_cpu_mask(cmask,
__ipi_flush_tlb_range_asid,
&ftd, 1);
} else
sbi_remote_sfence_vma_asid(cmask,
start, size, asid);
} else {
local_flush_tlb_range_asid(start, size, stride, asid);
}
} else {
if (broadcast) {
if (riscv_use_ipi_for_rfence()) {
ftd.asid = 0;
ftd.start = start;
ftd.size = size;
ftd.stride = stride;
on_each_cpu_mask(cmask,
__ipi_flush_tlb_range,
&ftd, 1);
} else
sbi_remote_sfence_vma(cmask, start, size);
} else {
local_flush_tlb_range(start, size, stride);
}
}
put_cpu();
}
void flush_tlb_mm(struct mm_struct *mm)
{
__flush_tlb_range(mm, 0, -1, PAGE_SIZE);
}
void flush_tlb_page(struct vm_area_struct *vma, unsigned long addr)
{
__flush_tlb_range(vma->vm_mm, addr, PAGE_SIZE, PAGE_SIZE);
}
void flush_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
__flush_tlb_range(vma->vm_mm, start, end - start, PAGE_SIZE);
}
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
void flush_pmd_tlb_range(struct vm_area_struct *vma, unsigned long start,
unsigned long end)
{
__flush_tlb_range(vma->vm_mm, start, end - start, PMD_SIZE);
}
#endif
|
