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>
26 #include <asm/kvm_ppc.h>
27 #include <asm/kvm_book3s.h>
28 #include <asm/machdep.h>
29 #include <asm/mmu_context.h>
30 #include <asm/hw_irq.h>
34 static struct kmem_cache *hpte_cache;
36 static inline u64 kvmppc_mmu_hash_pte(u64 eaddr)
38 return hash_64(eaddr >> PTE_SIZE, HPTEG_HASH_BITS_PTE);
41 static inline u64 kvmppc_mmu_hash_pte_long(u64 eaddr)
43 return hash_64((eaddr & 0x0ffff000) >> PTE_SIZE,
44 HPTEG_HASH_BITS_PTE_LONG);
47 static inline u64 kvmppc_mmu_hash_vpte(u64 vpage)
49 return hash_64(vpage & 0xfffffffffULL, HPTEG_HASH_BITS_VPTE);
52 static inline u64 kvmppc_mmu_hash_vpte_long(u64 vpage)
54 return hash_64((vpage & 0xffffff000ULL) >> 12,
55 HPTEG_HASH_BITS_VPTE_LONG);
58 void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
62 trace_kvm_book3s_mmu_map(pte);
64 spin_lock(&vcpu->arch.mmu_lock);
66 /* Add to ePTE list */
67 index = kvmppc_mmu_hash_pte(pte->pte.eaddr);
68 hlist_add_head_rcu(&pte->list_pte, &vcpu->arch.hpte_hash_pte[index]);
70 /* Add to ePTE_long list */
71 index = kvmppc_mmu_hash_pte_long(pte->pte.eaddr);
72 hlist_add_head_rcu(&pte->list_pte_long,
73 &vcpu->arch.hpte_hash_pte_long[index]);
75 /* Add to vPTE list */
76 index = kvmppc_mmu_hash_vpte(pte->pte.vpage);
77 hlist_add_head_rcu(&pte->list_vpte, &vcpu->arch.hpte_hash_vpte[index]);
79 /* Add to vPTE_long list */
80 index = kvmppc_mmu_hash_vpte_long(pte->pte.vpage);
81 hlist_add_head_rcu(&pte->list_vpte_long,
82 &vcpu->arch.hpte_hash_vpte_long[index]);
84 spin_unlock(&vcpu->arch.mmu_lock);
87 static void free_pte_rcu(struct rcu_head *head)
89 struct hpte_cache *pte = container_of(head, struct hpte_cache, rcu_head);
90 kmem_cache_free(hpte_cache, pte);
93 static void invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte)
95 /* pte already invalidated? */
96 if (hlist_unhashed(&pte->list_pte))
99 trace_kvm_book3s_mmu_invalidate(pte);
101 /* Different for 32 and 64 bit */
102 kvmppc_mmu_invalidate_pte(vcpu, pte);
104 spin_lock(&vcpu->arch.mmu_lock);
106 hlist_del_init_rcu(&pte->list_pte);
107 hlist_del_init_rcu(&pte->list_pte_long);
108 hlist_del_init_rcu(&pte->list_vpte);
109 hlist_del_init_rcu(&pte->list_vpte_long);
111 spin_unlock(&vcpu->arch.mmu_lock);
113 if (pte->pte.may_write)
114 kvm_release_pfn_dirty(pte->pfn);
116 kvm_release_pfn_clean(pte->pfn);
118 vcpu->arch.hpte_cache_count--;
119 call_rcu(&pte->rcu_head, free_pte_rcu);
122 static void kvmppc_mmu_pte_flush_all(struct kvm_vcpu *vcpu)
124 struct hpte_cache *pte;
125 struct hlist_node *node;
130 for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
131 struct hlist_head *list = &vcpu->arch.hpte_hash_vpte_long[i];
133 hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
134 invalidate_pte(vcpu, pte);
140 static void kvmppc_mmu_pte_flush_page(struct kvm_vcpu *vcpu, ulong guest_ea)
142 struct hlist_head *list;
143 struct hlist_node *node;
144 struct hpte_cache *pte;
146 /* Find the list of entries in the map */
147 list = &vcpu->arch.hpte_hash_pte[kvmppc_mmu_hash_pte(guest_ea)];
151 /* Check the list for matching entries and invalidate */
152 hlist_for_each_entry_rcu(pte, node, list, list_pte)
153 if ((pte->pte.eaddr & ~0xfffUL) == guest_ea)
154 invalidate_pte(vcpu, pte);
159 static void kvmppc_mmu_pte_flush_long(struct kvm_vcpu *vcpu, ulong guest_ea)
161 struct hlist_head *list;
162 struct hlist_node *node;
163 struct hpte_cache *pte;
165 /* Find the list of entries in the map */
166 list = &vcpu->arch.hpte_hash_pte_long[
167 kvmppc_mmu_hash_pte_long(guest_ea)];
171 /* Check the list for matching entries and invalidate */
172 hlist_for_each_entry_rcu(pte, node, list, list_pte_long)
173 if ((pte->pte.eaddr & 0x0ffff000UL) == guest_ea)
174 invalidate_pte(vcpu, pte);
179 void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong guest_ea, ulong ea_mask)
181 trace_kvm_book3s_mmu_flush("", vcpu, guest_ea, ea_mask);
186 kvmppc_mmu_pte_flush_page(vcpu, guest_ea);
189 kvmppc_mmu_pte_flush_long(vcpu, guest_ea);
192 /* Doing a complete flush -> start from scratch */
193 kvmppc_mmu_pte_flush_all(vcpu);
201 /* Flush with mask 0xfffffffff */
202 static void kvmppc_mmu_pte_vflush_short(struct kvm_vcpu *vcpu, u64 guest_vp)
204 struct hlist_head *list;
205 struct hlist_node *node;
206 struct hpte_cache *pte;
207 u64 vp_mask = 0xfffffffffULL;
209 list = &vcpu->arch.hpte_hash_vpte[kvmppc_mmu_hash_vpte(guest_vp)];
213 /* Check the list for matching entries and invalidate */
214 hlist_for_each_entry_rcu(pte, node, list, list_vpte)
215 if ((pte->pte.vpage & vp_mask) == guest_vp)
216 invalidate_pte(vcpu, pte);
221 /* Flush with mask 0xffffff000 */
222 static void kvmppc_mmu_pte_vflush_long(struct kvm_vcpu *vcpu, u64 guest_vp)
224 struct hlist_head *list;
225 struct hlist_node *node;
226 struct hpte_cache *pte;
227 u64 vp_mask = 0xffffff000ULL;
229 list = &vcpu->arch.hpte_hash_vpte_long[
230 kvmppc_mmu_hash_vpte_long(guest_vp)];
234 /* Check the list for matching entries and invalidate */
235 hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
236 if ((pte->pte.vpage & vp_mask) == guest_vp)
237 invalidate_pte(vcpu, pte);
242 void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 guest_vp, u64 vp_mask)
244 trace_kvm_book3s_mmu_flush("v", vcpu, guest_vp, vp_mask);
249 kvmppc_mmu_pte_vflush_short(vcpu, guest_vp);
252 kvmppc_mmu_pte_vflush_long(vcpu, guest_vp);
260 void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end)
262 struct hlist_node *node;
263 struct hpte_cache *pte;
266 trace_kvm_book3s_mmu_flush("p", vcpu, pa_start, pa_end);
270 for (i = 0; i < HPTEG_HASH_NUM_VPTE_LONG; i++) {
271 struct hlist_head *list = &vcpu->arch.hpte_hash_vpte_long[i];
273 hlist_for_each_entry_rcu(pte, node, list, list_vpte_long)
274 if ((pte->pte.raddr >= pa_start) &&
275 (pte->pte.raddr < pa_end))
276 invalidate_pte(vcpu, pte);
282 struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu)
284 struct hpte_cache *pte;
286 pte = kmem_cache_zalloc(hpte_cache, GFP_KERNEL);
287 vcpu->arch.hpte_cache_count++;
289 if (vcpu->arch.hpte_cache_count == HPTEG_CACHE_NUM)
290 kvmppc_mmu_pte_flush_all(vcpu);
295 void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu)
297 kvmppc_mmu_pte_flush(vcpu, 0, 0);
300 static void kvmppc_mmu_hpte_init_hash(struct hlist_head *hash_list, int len)
304 for (i = 0; i < len; i++)
305 INIT_HLIST_HEAD(&hash_list[i]);
308 int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu)
310 /* init hpte lookup hashes */
311 kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_pte,
312 ARRAY_SIZE(vcpu->arch.hpte_hash_pte));
313 kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_pte_long,
314 ARRAY_SIZE(vcpu->arch.hpte_hash_pte_long));
315 kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_vpte,
316 ARRAY_SIZE(vcpu->arch.hpte_hash_vpte));
317 kvmppc_mmu_hpte_init_hash(vcpu->arch.hpte_hash_vpte_long,
318 ARRAY_SIZE(vcpu->arch.hpte_hash_vpte_long));
320 spin_lock_init(&vcpu->arch.mmu_lock);
325 int kvmppc_mmu_hpte_sysinit(void)
327 /* init hpte slab cache */
328 hpte_cache = kmem_cache_create("kvm-spt", sizeof(struct hpte_cache),
329 sizeof(struct hpte_cache), 0, NULL);
334 void kvmppc_mmu_hpte_sysexit(void)
336 kmem_cache_destroy(hpte_cache);