2 * Copyright (C) 2010 SUSE Linux Products GmbH. All rights reserved.
5 * Alexander Graf <agraf@suse.de>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License, version 2, as
9 * published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
21 #include <linux/kvm_host.h>
22 #include <linux/hash.h>
23 #include <linux/slab.h>
25 #include <asm/kvm_ppc.h>
26 #include <asm/kvm_book3s.h>
27 #include <asm/machdep.h>
28 #include <asm/mmu_context.h>
29 #include <asm/hw_irq.h>
35 static struct kmem_cache *hpte_cache;
37 static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
39 return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE);
42 static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr)
44 return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE,
45 HPTEG_HASH_BITS_PTE_LONG);
48 static inline u64 kvmppc_mmu_hash_vpte(u64 vpage)
50 return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE);
53 static inline u64 kvmppc_mmu_hash_vpte_long(u64 vpage)
55 return hash_64((vpage & 0xffffff000ULL) >> 12,
56 HPTEG_HASH_BITS_VPTE_LONG);
59 #ifdef CONFIG_PPC_BOOK3S_64
60 static inline u64 kvmppc_mmu_hash_vpte_64k(u64 vpage)
62 return hash_64((vpage & 0xffffffff0ULL) >> 4,
63 HPTEG_HASH_BITS_VPTE_64K);
67 void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
70 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
72 trace_kvm_book3s_mmu_map(pte);
74 spin_lock(&vcpu3s->mmu_lock);
76 /* Add to ePTE list */
77 index = kvmppc_mmu_hash_pte(pte->pte.eaddr);
78 hlist_add_head_rcu(&pte->list_pte, &vcpu3s->hpte_hash_pte[index]);
80 /* Add to ePTE_long list */
81 index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr);
82 hlist_add_head_rcu(&pte->list_pte_long,
83 &vcpu3s->hpte_hash_pte_long[index]);
85 /* Add to vPTE list */
86 index = kvmppc_mmu_hash_vpte(pte->pte.vpage);
87 hlist_add_head_rcu(&pte->list_vpte, &vcpu3s->hpte_hash_vpte[index]);
89 /* Add to vPTE_long list */
90 index = kvmppc_mmu_hash_vpte_long(pte->pte.vpage);
91 hlist_add_head_rcu(&pte->list_vpte_long,
92 &vcpu3s->hpte_hash_vpte_long[index]);
94 #ifdef CONFIG_PPC_BOOK3S_64
95 /* Add to vPTE_64k list */
96 index = kvmppc_mmu_hash_vpte_64k(pte->pte.vpage);
97 hlist_add_head_rcu(&pte->list_vpte_64k,
98 &vcpu3s->hpte_hash_vpte_64k[index]);
101 spin_unlock(&vcpu3s->mmu_lock);
104 static void free_pte_rcu(struct rcu_head *head)
106 struct hpte_cache *pte = container_of(head, struct hpte_cache, rcu_head);
107 kmem_cache_free(hpte_cache, pte);
110 static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
112 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
114 trace_kvm_book3s_mmu_invalidate(pte);
116 /* Different for 32 and 64 bit */
117 kvmppc_mmu_invalidate_pte(vcpu, pte);
119 spin_lock(&vcpu3s->mmu_lock);
121 /* pte already invalidated in between? */
122 if (hlist_unhashed(&pte->list_pte)) {
123 spin_unlock(&vcpu3s->mmu_lock);
127 hlist_del_init_rcu(&pte->list_pte);
128 hlist_del_init_rcu(&pte->list_pte_long);
129 hlist_del_init_rcu(&pte->list_vpte);
130 hlist_del_init_rcu(&pte->list_vpte_long);
131 #ifdef CONFIG_PPC_BOOK3S_64
132 hlist_del_init_rcu(&pte->list_vpte_64k);
135 spin_unlock(&vcpu3s->mmu_lock);
137 vcpu3s->hpte_cache_count--;
138 call_rcu(&pte->rcu_head, free_pte_rcu);
141 static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
143 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
144 struct hpte_cache *pte;
149 for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
150 struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
152 hlist_for_each_entry_rcu(pte, list, list_vpte_long)
153 invalidate_pte(vcpu, pte);
159 static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
161 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
162 struct hlist_head *list;
163 struct hpte_cache *pte;
165 /* Find the list of entries in the map */
166 list = &vcpu3s->hpte_hash_pte[kvmppc_mmu_hash_pte(guest_ea)];
170 /* Check the list for matching entries and invalidate */
171 hlist_for_each_entry_rcu(pte, list, list_pte)
172 if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
173 invalidate_pte(vcpu, pte);
178 static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
180 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
181 struct hlist_head *list;
182 struct hpte_cache *pte;
184 /* Find the list of entries in the map */
185 list = &vcpu3s->hpte_hash_pte_long[
186 kvmppc_mmu_hash_pte_long(guest_ea)];
190 /* Check the list for matching entries and invalidate */
191 hlist_for_each_entry_rcu(pte, list, list_pte_long)
192 if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
193 invalidate_pte(vcpu, pte);
198 void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
200 trace_kvm_book3s_mmu_flush("", vcpu, guest_ea, ea_mask);
205 kvmppc_mmu_pte_flush_page(vcpu, guest_ea);
208 kvmppc_mmu_pte_flush_long(vcpu, guest_ea);
211 /* Doing a complete flush -> start from scratch */
212 kvmppc_mmu_pte_flush_all(vcpu);
220 /* Flush with mask 0xfffffffff */
221 static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
223 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
224 struct hlist_head *list;
225 struct hpte_cache *pte;
226 u64 vp_mask = 0xfffffffffULL;
228 list = &vcpu3s->hpte_hash_vpte[kvmppc_mmu_hash_vpte(guest_vp)];
232 /* Check the list for matching entries and invalidate */
233 hlist_for_each_entry_rcu(pte, list, list_vpte)
234 if ((pte->pte.vpage & vp_mask) == guest_vp)
235 invalidate_pte(vcpu, pte);
240 #ifdef CONFIG_PPC_BOOK3S_64
241 /* Flush with mask 0xffffffff0 */
242 static void kvmppc_mmu_pte_vflush_64k(struct kvm_vcpu *vcpu, u64 guest_vp)
244 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
245 struct hlist_head *list;
246 struct hpte_cache *pte;
247 u64 vp_mask = 0xffffffff0ULL;
249 list = &vcpu3s->hpte_hash_vpte_64k[
250 kvmppc_mmu_hash_vpte_64k(guest_vp)];
254 /* Check the list for matching entries and invalidate */
255 hlist_for_each_entry_rcu(pte, list, list_vpte_64k)
256 if ((pte->pte.vpage & vp_mask) == guest_vp)
257 invalidate_pte(vcpu, pte);
263 /* Flush with mask 0xffffff000 */
264 static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
266 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
267 struct hlist_head *list;
268 struct hpte_cache *pte;
269 u64 vp_mask = 0xffffff000ULL;
271 list = &vcpu3s->hpte_hash_vpte_long[
272 kvmppc_mmu_hash_vpte_long(guest_vp)];
276 /* Check the list for matching entries and invalidate */
277 hlist_for_each_entry_rcu(pte, list, list_vpte_long)
278 if ((pte->pte.vpage & vp_mask) == guest_vp)
279 invalidate_pte(vcpu, pte);
284 void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
286 trace_kvm_book3s_mmu_flush("v", vcpu, guest_vp, vp_mask);
291 kvmppc_mmu_pte_vflush_short(vcpu, guest_vp);
293 #ifdef CONFIG_PPC_BOOK3S_64
295 kvmppc_mmu_pte_vflush_64k(vcpu, guest_vp);
299 kvmppc_mmu_pte_vflush_long(vcpu, guest_vp);
307 void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
309 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
310 struct hpte_cache *pte;
313 trace_kvm_book3s_mmu_flush("p", vcpu, pa_start, pa_end);
317 for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
318 struct hlist_head *list = &vcpu3s->hpte_hash_vpte_long[i];
320 hlist_for_each_entry_rcu(pte, list, list_vpte_long)
321 if ((pte->pte.raddr >= pa_start) &&
322 (pte->pte.raddr < pa_end))
323 invalidate_pte(vcpu, pte);
329 struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu)
331 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
332 struct hpte_cache *pte;
334 pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL);
335 vcpu3s->hpte_cache_count++;
337 if (vcpu3s->hpte_cache_count == HPTEG_CACHE_NUM)
338 kvmppc_mmu_pte_flush_all(vcpu);
343 void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu)
345 kvmppc_mmu_pte_flush(vcpu, 0, 0);
348 static void kvmppc_mmu_hpte_init_hash(struct hlist_head *hash_list, int len)
352 for (i = 0; i < len; i++)
353 INIT_HLIST_HEAD(&hash_list[i]);
356 int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu)
358 struct kvmppc_vcpu_book3s *vcpu3s = to_book3s(vcpu);
360 /* init hpte lookup hashes */
361 kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte,
362 ARRAY_SIZE(vcpu3s->hpte_hash_pte));
363 kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_pte_long,
364 ARRAY_SIZE(vcpu3s->hpte_hash_pte_long));
365 kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte,
366 ARRAY_SIZE(vcpu3s->hpte_hash_vpte));
367 kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_long,
368 ARRAY_SIZE(vcpu3s->hpte_hash_vpte_long));
369 #ifdef CONFIG_PPC_BOOK3S_64
370 kvmppc_mmu_hpte_init_hash(vcpu3s->hpte_hash_vpte_64k,
371 ARRAY_SIZE(vcpu3s->hpte_hash_vpte_64k));
374 spin_lock_init(&vcpu3s->mmu_lock);
379 int kvmppc_mmu_hpte_sysinit(void)
381 /* init hpte slab cache */
382 hpte_cache = kmem_cache_create("kvm-spt", sizeof(struct hpte_cache),
383 sizeof(struct hpte_cache), 0, NULL);
388 void kvmppc_mmu_hpte_sysexit(void)
390 kmem_cache_destroy(hpte_cache);