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-rw-r--r--arch/um/kernel/tlb.c226
1 files changed, 116 insertions, 110 deletions
diff --git a/arch/um/kernel/tlb.c b/arch/um/kernel/tlb.c
index 83ec8d4747fd..7d914bb6b002 100644
--- a/arch/um/kernel/tlb.c
+++ b/arch/um/kernel/tlb.c
@@ -15,12 +15,116 @@
15#include "mem_user.h" 15#include "mem_user.h"
16#include "os.h" 16#include "os.h"
17 17
18static int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
19 int r, int w, int x, struct host_vm_op *ops, int index,
20 int last_filled, union mm_context *mmu, void **flush,
21 void *(*do_ops)(union mm_context *, struct host_vm_op *,
22 int, int, void *))
23{
24 __u64 offset;
25 struct host_vm_op *last;
26 int fd;
27
28 fd = phys_mapping(phys, &offset);
29 if(index != -1){
30 last = &ops[index];
31 if((last->type == MMAP) &&
32 (last->u.mmap.addr + last->u.mmap.len == virt) &&
33 (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
34 (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
35 (last->u.mmap.offset + last->u.mmap.len == offset)){
36 last->u.mmap.len += len;
37 return index;
38 }
39 }
40
41 if(index == last_filled){
42 *flush = (*do_ops)(mmu, ops, last_filled, 0, *flush);
43 index = -1;
44 }
45
46 ops[++index] = ((struct host_vm_op) { .type = MMAP,
47 .u = { .mmap = {
48 .addr = virt,
49 .len = len,
50 .r = r,
51 .w = w,
52 .x = x,
53 .fd = fd,
54 .offset = offset }
55 } });
56 return index;
57}
58
59static int add_munmap(unsigned long addr, unsigned long len,
60 struct host_vm_op *ops, int index, int last_filled,
61 union mm_context *mmu, void **flush,
62 void *(*do_ops)(union mm_context *, struct host_vm_op *,
63 int, int, void *))
64{
65 struct host_vm_op *last;
66
67 if(index != -1){
68 last = &ops[index];
69 if((last->type == MUNMAP) &&
70 (last->u.munmap.addr + last->u.mmap.len == addr)){
71 last->u.munmap.len += len;
72 return index;
73 }
74 }
75
76 if(index == last_filled){
77 *flush = (*do_ops)(mmu, ops, last_filled, 0, *flush);
78 index = -1;
79 }
80
81 ops[++index] = ((struct host_vm_op) { .type = MUNMAP,
82 .u = { .munmap = {
83 .addr = addr,
84 .len = len } } });
85 return index;
86}
87
88static int add_mprotect(unsigned long addr, unsigned long len, int r, int w,
89 int x, struct host_vm_op *ops, int index,
90 int last_filled, union mm_context *mmu, void **flush,
91 void *(*do_ops)(union mm_context *,
92 struct host_vm_op *, int, int, void *))
93{
94 struct host_vm_op *last;
95
96 if(index != -1){
97 last = &ops[index];
98 if((last->type == MPROTECT) &&
99 (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
100 (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
101 (last->u.mprotect.x == x)){
102 last->u.mprotect.len += len;
103 return index;
104 }
105 }
106
107 if(index == last_filled){
108 *flush = (*do_ops)(mmu, ops, last_filled, 0, *flush);
109 index = -1;
110 }
111
112 ops[++index] = ((struct host_vm_op) { .type = MPROTECT,
113 .u = { .mprotect = {
114 .addr = addr,
115 .len = len,
116 .r = r,
117 .w = w,
118 .x = x } } });
119 return index;
120}
121
18#define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1)) 122#define ADD_ROUND(n, inc) (((n) + (inc)) & ~((inc) - 1))
19 123
20void fix_range_common(struct mm_struct *mm, unsigned long start_addr, 124void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
21 unsigned long end_addr, int force, 125 unsigned long end_addr, int force,
22 void (*do_ops)(union mm_context *, struct host_vm_op *, 126 void *(*do_ops)(union mm_context *, struct host_vm_op *,
23 int)) 127 int, int, void *))
24{ 128{
25 pgd_t *npgd; 129 pgd_t *npgd;
26 pud_t *npud; 130 pud_t *npud;
@@ -29,11 +133,13 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
29 union mm_context *mmu = &mm->context; 133 union mm_context *mmu = &mm->context;
30 unsigned long addr, end; 134 unsigned long addr, end;
31 int r, w, x; 135 int r, w, x;
32 struct host_vm_op ops[16]; 136 struct host_vm_op ops[1];
137 void *flush = NULL;
33 int op_index = -1, last_op = sizeof(ops) / sizeof(ops[0]) - 1; 138 int op_index = -1, last_op = sizeof(ops) / sizeof(ops[0]) - 1;
34 139
35 if(mm == NULL) return; 140 if(mm == NULL) return;
36 141
142 ops[0].type = NONE;
37 for(addr = start_addr; addr < end_addr;){ 143 for(addr = start_addr; addr < end_addr;){
38 npgd = pgd_offset(mm, addr); 144 npgd = pgd_offset(mm, addr);
39 if(!pgd_present(*npgd)){ 145 if(!pgd_present(*npgd)){
@@ -43,7 +149,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
43 if(force || pgd_newpage(*npgd)){ 149 if(force || pgd_newpage(*npgd)){
44 op_index = add_munmap(addr, end - addr, ops, 150 op_index = add_munmap(addr, end - addr, ops,
45 op_index, last_op, mmu, 151 op_index, last_op, mmu,
46 do_ops); 152 &flush, do_ops);
47 pgd_mkuptodate(*npgd); 153 pgd_mkuptodate(*npgd);
48 } 154 }
49 addr = end; 155 addr = end;
@@ -58,7 +164,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
58 if(force || pud_newpage(*npud)){ 164 if(force || pud_newpage(*npud)){
59 op_index = add_munmap(addr, end - addr, ops, 165 op_index = add_munmap(addr, end - addr, ops,
60 op_index, last_op, mmu, 166 op_index, last_op, mmu,
61 do_ops); 167 &flush, do_ops);
62 pud_mkuptodate(*npud); 168 pud_mkuptodate(*npud);
63 } 169 }
64 addr = end; 170 addr = end;
@@ -73,7 +179,7 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
73 if(force || pmd_newpage(*npmd)){ 179 if(force || pmd_newpage(*npmd)){
74 op_index = add_munmap(addr, end - addr, ops, 180 op_index = add_munmap(addr, end - addr, ops,
75 op_index, last_op, mmu, 181 op_index, last_op, mmu,
76 do_ops); 182 &flush, do_ops);
77 pmd_mkuptodate(*npmd); 183 pmd_mkuptodate(*npmd);
78 } 184 }
79 addr = end; 185 addr = end;
@@ -96,20 +202,20 @@ void fix_range_common(struct mm_struct *mm, unsigned long start_addr,
96 pte_val(*npte) & PAGE_MASK, 202 pte_val(*npte) & PAGE_MASK,
97 PAGE_SIZE, r, w, x, ops, 203 PAGE_SIZE, r, w, x, ops,
98 op_index, last_op, mmu, 204 op_index, last_op, mmu,
99 do_ops); 205 &flush, do_ops);
100 else op_index = add_munmap(addr, PAGE_SIZE, ops, 206 else op_index = add_munmap(addr, PAGE_SIZE, ops,
101 op_index, last_op, mmu, 207 op_index, last_op, mmu,
102 do_ops); 208 &flush, do_ops);
103 } 209 }
104 else if(pte_newprot(*npte)) 210 else if(pte_newprot(*npte))
105 op_index = add_mprotect(addr, PAGE_SIZE, r, w, x, ops, 211 op_index = add_mprotect(addr, PAGE_SIZE, r, w, x, ops,
106 op_index, last_op, mmu, 212 op_index, last_op, mmu,
107 do_ops); 213 &flush, do_ops);
108 214
109 *npte = pte_mkuptodate(*npte); 215 *npte = pte_mkuptodate(*npte);
110 addr += PAGE_SIZE; 216 addr += PAGE_SIZE;
111 } 217 }
112 (*do_ops)(mmu, ops, op_index); 218 flush = (*do_ops)(mmu, ops, op_index, 1, flush);
113} 219}
114 220
115int flush_tlb_kernel_range_common(unsigned long start, unsigned long end) 221int flush_tlb_kernel_range_common(unsigned long start, unsigned long end)
@@ -226,106 +332,6 @@ pte_t *addr_pte(struct task_struct *task, unsigned long addr)
226 return(pte_offset_map(pmd, addr)); 332 return(pte_offset_map(pmd, addr));
227} 333}
228 334
229int add_mmap(unsigned long virt, unsigned long phys, unsigned long len,
230 int r, int w, int x, struct host_vm_op *ops, int index,
231 int last_filled, union mm_context *mmu,
232 void (*do_ops)(union mm_context *, struct host_vm_op *, int))
233{
234 __u64 offset;
235 struct host_vm_op *last;
236 int fd;
237
238 fd = phys_mapping(phys, &offset);
239 if(index != -1){
240 last = &ops[index];
241 if((last->type == MMAP) &&
242 (last->u.mmap.addr + last->u.mmap.len == virt) &&
243 (last->u.mmap.r == r) && (last->u.mmap.w == w) &&
244 (last->u.mmap.x == x) && (last->u.mmap.fd == fd) &&
245 (last->u.mmap.offset + last->u.mmap.len == offset)){
246 last->u.mmap.len += len;
247 return(index);
248 }
249 }
250
251 if(index == last_filled){
252 (*do_ops)(mmu, ops, last_filled);
253 index = -1;
254 }
255
256 ops[++index] = ((struct host_vm_op) { .type = MMAP,
257 .u = { .mmap = {
258 .addr = virt,
259 .len = len,
260 .r = r,
261 .w = w,
262 .x = x,
263 .fd = fd,
264 .offset = offset }
265 } });
266 return(index);
267}
268
269int add_munmap(unsigned long addr, unsigned long len, struct host_vm_op *ops,
270 int index, int last_filled, union mm_context *mmu,
271 void (*do_ops)(union mm_context *, struct host_vm_op *, int))
272{
273 struct host_vm_op *last;
274
275 if(index != -1){
276 last = &ops[index];
277 if((last->type == MUNMAP) &&
278 (last->u.munmap.addr + last->u.mmap.len == addr)){
279 last->u.munmap.len += len;
280 return(index);
281 }
282 }
283
284 if(index == last_filled){
285 (*do_ops)(mmu, ops, last_filled);
286 index = -1;
287 }
288
289 ops[++index] = ((struct host_vm_op) { .type = MUNMAP,
290 .u = { .munmap = {
291 .addr = addr,
292 .len = len } } });
293 return(index);
294}
295
296int add_mprotect(unsigned long addr, unsigned long len, int r, int w, int x,
297 struct host_vm_op *ops, int index, int last_filled,
298 union mm_context *mmu,
299 void (*do_ops)(union mm_context *, struct host_vm_op *, int))
300{
301 struct host_vm_op *last;
302
303 if(index != -1){
304 last = &ops[index];
305 if((last->type == MPROTECT) &&
306 (last->u.mprotect.addr + last->u.mprotect.len == addr) &&
307 (last->u.mprotect.r == r) && (last->u.mprotect.w == w) &&
308 (last->u.mprotect.x == x)){
309 last->u.mprotect.len += len;
310 return(index);
311 }
312 }
313
314 if(index == last_filled){
315 (*do_ops)(mmu, ops, last_filled);
316 index = -1;
317 }
318
319 ops[++index] = ((struct host_vm_op) { .type = MPROTECT,
320 .u = { .mprotect = {
321 .addr = addr,
322 .len = len,
323 .r = r,
324 .w = w,
325 .x = x } } });
326 return(index);
327}
328
329void flush_tlb_page(struct vm_area_struct *vma, unsigned long address) 335void flush_tlb_page(struct vm_area_struct *vma, unsigned long address)
330{ 336{
331 address &= PAGE_MASK; 337 address &= PAGE_MASK;
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