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
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
|
/*
* Copyright (C) 2010 SUSE Linux Products GmbH. All rights reserved.
*
* Authors:
* Alexander Graf <agraf@suse.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <linux/kvm_host.h>
#include <linux/hash.h>
#include <linux/slab.h>
#include <asm/kvm_ppc.h>
#include <asm/kvm_book3s.h>
#include <asm/machdep.h>
#include <asm/mmu_context.h>
#include <asm/hw_irq.h>
#include "trace.h"
#define PTE_SIZE 12
static struct kmem_cache *hpte_cache;
static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
{
return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE);
}
static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr)
{
return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE,
HPTEG_HASH_BITS_PTE_LONG);
}
static inline u64 kvmppc_mmu_hash_vpte(u64 vpage)
{
return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE);
}
static inline u64 kvmppc_mmu_hash_vpte_long(u64 vpage)
{
return hash_64((vpage & 0xffffff000ULL) >> 12,
HPTEG_HASH_BITS_VPTE_LONG);
}
void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
{
u64 index;
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
trace_kvm_book3s_mmu_map(pte);
spin_lock(&vcpu3s->mmu_lock);
/* Add to ePTE list */
index = kvmppc_mmu_hash_pte(pte->pte.eaddr);
hlist_add_head_rcu(&pte->list_pte, &vcpu3s->hpte_hash_pte[index]);
/* Add to ePTE_long list */
index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr);
hlist_add_head_rcu(&pte->list_pte_long,
&vcpu3s->hpte_hash_pte_long[index]);
/* Add to vPTE list */
index = kvmppc_mmu_hash_vpte(pte->pte.vpage);
hlist_add_head_rcu(&pte->list_vpte, &vcpu3s->hpte_hash_vpte[index]);
/* Add to vPTE_long list */
index = kvmppc_mmu_hash_vpte_long(pte->pte.vpage);
hlist_add_head_rcu(&pte->list_vpte_long,
&vcpu3s->hpte_hash_vpte_long[index]);
spin_unlock(&vcpu3s->mmu_lock);
}
static void free_pte_rcu(struct rcu_head *head)
{
struct hpte_cache *pte = container_of(head, struct hpte_cache, rcu_head);
kmem_cache_free(hpte_cache, pte);
}
static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
trace_kvm_book3s_mmu_invalidate(pte);
/* Different for 32 and 64 bit */
kvmppc_mmu_invalidate_pte(vcpu, pte);
spin_lock(&vcpu3s->mmu_lock);
/* pte already invalidated in between? */
if (hlist_unhashed(&pte->list_pte)) {
spin_unlock(&vcpu3s->mmu_lock);
return;
}
hlist_del_init_rcu(&pte->list_pte);
hlist_del_init_rcu(&pte->list_pte_long);
hlist_del_init_rcu(&pte->list_vpte);
hlist_del_init_rcu(&pte->list_vpte_long);
if (pte->pte.may_write)
kvm_release_pfn_dirty(pte->pfn);
else
kvm_release_pfn_clean(pte->pfn);
spin_unlock(&vcpu3s->mmu_lock);
vcpu3s->hpte_cache_count--;
call_rcu(&pte->rcu_head, free_pte_rcu);
}
static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hpte_cache *pte;
struct hlist_node *node;
int i;
rcu_read_lock();
for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
invalidate_pte(vcpu, pte);
}
rcu_read_unlock();
}
static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hlist_head *list;
struct hlist_node *node;
struct hpte_cache *pte;
/* Find the list of entries in the map */
list = &vcpu3s->hpte_hash_pte[kvmppc_mmu_hash_pte(guest_ea)];
rcu_read_lock();
/* Check the list for matching entries and invalidate */
hlist_for_each_entry_rcu(pte, node, list, list_pte)
if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
invalidate_pte(vcpu, pte);
rcu_read_unlock();
}
static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hlist_head *list;
struct hlist_node *node;
struct hpte_cache *pte;
/* Find the list of entries in the map */
list = &vcpu3s->hpte_hash_pte_long[
kvmppc_mmu_hash_pte_long(guest_ea)];
rcu_read_lock();
/* Check the list for matching entries and invalidate */
hlist_for_each_entry_rcu(pte, node, list, list_pte_long)
if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
invalidate_pte(vcpu, pte);
rcu_read_unlock();
}
void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
{
trace_kvm_book3s_mmu_flush("", vcpu, guest_ea, ea_mask);
guest_ea &= ea_mask;
switch (ea_mask) {
case ~0xfffUL:
kvmppc_mmu_pte_flush_page(vcpu, guest_ea);
break;
case 0x0ffff000:
kvmppc_mmu_pte_flush_long(vcpu, guest_ea);
break;
case 0:
/* Doing a complete flush -> start from scratch */
kvmppc_mmu_pte_flush_all(vcpu);
break;
default:
WARN_ON(1);
break;
}
}
/* Flush with mask 0xfffffffff */
static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hlist_head *list;
struct hlist_node *node;
struct hpte_cache *pte;
u64 vp_mask = 0xfffffffffULL;
list = &vcpu3s->hpte_hash_vpte[kvmppc_mmu_hash_vpte(guest_vp)];
rcu_read_lock();
/* Check the list for matching entries and invalidate */
hlist_for_each_entry_rcu(pte, node, list, list_vpte)
if ((pte->pte.vpage & vp_mask) == guest_vp)
invalidate_pte(vcpu, pte);
rcu_read_unlock();
}
/* Flush with mask 0xffffff000 */
static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hlist_head *list;
struct hlist_node *node;
struct hpte_cache *pte;
u64 vp_mask = 0xffffff000ULL;
list = &vcpu3s->hpte_hash_vpte_long[
kvmppc_mmu_hash_vpte_long(guest_vp)];
rcu_read_lock();
/* Check the list for matching entries and invalidate */
hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
if ((pte->pte.vpage & vp_mask) == guest_vp)
invalidate_pte(vcpu, pte);
rcu_read_unlock();
}
void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
{
trace_kvm_book3s_mmu_flush("v", vcpu, guest_vp, vp_mask);
guest_vp &= vp_mask;
switch(vp_mask) {
case 0xfffffffffULL:
kvmppc_mmu_pte_vflush_short(vcpu, guest_vp);
break;
case 0xffffff000ULL:
kvmppc_mmu_pte_vflush_long(vcpu, guest_vp);
break;
default:
WARN_ON(1);
return;
}
}
void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hlist_node *node;
struct hpte_cache *pte;
int i;
trace_kvm_book3s_mmu_flush("p", vcpu, pa_start, pa_end);
rcu_read_lock();
for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
if ((pte->pte.raddr >= pa_start) &&
(pte->pte.raddr < pa_end))
invalidate_pte(vcpu, pte);
}
rcu_read_unlock();
}
struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
struct hpte_cache *pte;
pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL);
vcpu3s->hpte_cache_count++;
if (vcpu3s->hpte_cache_count == HPTEG_CACHE_NUM)
kvmppc_mmu_pte_flush_all(vcpu);
return pte;
}
void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu)
{
kvmppc_mmu_pte_flush(vcpu, 0, 0);
}
static void kvmppc_mmu_hpte_init_hash(struct hlist_head *hash_list, int len)
{
int i;
for (i = 0; i < len; i++)
INIT_HLIST_HEAD(&hash_list[i]);
}
int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu)
{
struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
/* init hpte lookup hashes */
kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte,
ARRAY_SIZE(vcpu3s->hpte_hash_pte));
kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte_long,
ARRAY_SIZE(vcpu3s->hpte_hash_pte_long));
kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte,
ARRAY_SIZE(vcpu3s->hpte_hash_vpte));
kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_long,
ARRAY_SIZE(vcpu3s->hpte_hash_vpte_long));
spin_lock_init(&vcpu3s->mmu_lock);
return 0;
}
int kvmppc_mmu_hpte_sysinit(void)
{
/* init hpte slab cache */
hpte_cache = kmem_cache_create("kvm-spt", sizeof(struct hpte_cache),
sizeof(struct hpte_cache), 0, NULL);
return 0;
}
void kvmppc_mmu_hpte_sysexit(void)
{
kmem_cache_destroy(hpte_cache);
}
|
