1 /*
2  * This program is free software; you can redistribute it and/or modify
3  * it under the terms of the GNU General Public License, version 2, as
4  * published by the Free Software Foundation.
5  *
6  * This program is distributed in the hope that it will be useful,
7  * but WITHOUT ANY WARRANTY; without even the implied warranty of
8  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
9  * GNU General Public License for more details.
10  *
11  * You should have received a copy of the GNU General Public License
12  * along with this program; if not, write to the Free Software
13  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
14  *
15  * Copyright SUSE Linux Products GmbH 2009
16  *
17  * Authors: Alexander Graf <agraf@suse.de>
18  */
19 
20 #ifndef __ASM_KVM_BOOK3S_H__
21 #define __ASM_KVM_BOOK3S_H__
22 
23 #include <linux/types.h>
24 #include <linux/kvm_host.h>
25 #include <asm/kvm_book3s_asm.h>
26 
27 struct kvmppc_bat {
28 	u64 raw;
29 	u32 bepi;
30 	u32 bepi_mask;
31 	u32 brpn;
32 	u8 wimg;
33 	u8 pp;
34 	bool vs		: 1;
35 	bool vp		: 1;
36 };
37 
38 struct kvmppc_sid_map {
39 	u64 guest_vsid;
40 	u64 guest_esid;
41 	u64 host_vsid;
42 	bool valid	: 1;
43 };
44 
45 #define SID_MAP_BITS    9
46 #define SID_MAP_NUM     (1 << SID_MAP_BITS)
47 #define SID_MAP_MASK    (SID_MAP_NUM - 1)
48 
49 #ifdef CONFIG_PPC_BOOK3S_64
50 #define SID_CONTEXTS	1
51 #else
52 #define SID_CONTEXTS	128
53 #define VSID_POOL_SIZE	(SID_CONTEXTS * 16)
54 #endif
55 
56 struct hpte_cache {
57 	struct hlist_node list_pte;
58 	struct hlist_node list_pte_long;
59 	struct hlist_node list_vpte;
60 	struct hlist_node list_vpte_long;
61 #ifdef CONFIG_PPC_BOOK3S_64
62 	struct hlist_node list_vpte_64k;
63 #endif
64 	struct rcu_head rcu_head;
65 	u64 host_vpn;
66 	u64 pfn;
67 	ulong slot;
68 	struct kvmppc_pte pte;
69 	int pagesize;
70 };
71 
72 struct kvmppc_vcpu_book3s {
73 	struct kvmppc_sid_map sid_map[SID_MAP_NUM];
74 	struct {
75 		u64 esid;
76 		u64 vsid;
77 	} slb_shadow[64];
78 	u8 slb_shadow_max;
79 	struct kvmppc_bat ibat[8];
80 	struct kvmppc_bat dbat[8];
81 	u64 hid[6];
82 	u64 gqr[8];
83 	u64 sdr1;
84 	u64 hior;
85 	u64 msr_mask;
86 #ifdef CONFIG_PPC_BOOK3S_32
87 	u32 vsid_pool[VSID_POOL_SIZE];
88 	u32 vsid_next;
89 #else
90 	u64 proto_vsid_first;
91 	u64 proto_vsid_max;
92 	u64 proto_vsid_next;
93 #endif
94 	int context_id[SID_CONTEXTS];
95 
96 	bool hior_explicit;		/* HIOR is set by ioctl, not PVR */
97 
98 	struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];
99 	struct hlist_head hpte_hash_pte_long[HPTEG_HASH_NUM_PTE_LONG];
100 	struct hlist_head hpte_hash_vpte[HPTEG_HASH_NUM_VPTE];
101 	struct hlist_head hpte_hash_vpte_long[HPTEG_HASH_NUM_VPTE_LONG];
102 #ifdef CONFIG_PPC_BOOK3S_64
103 	struct hlist_head hpte_hash_vpte_64k[HPTEG_HASH_NUM_VPTE_64K];
104 #endif
105 	int hpte_cache_count;
106 	spinlock_t mmu_lock;
107 };
108 
109 #define CONTEXT_HOST		0
110 #define CONTEXT_GUEST		1
111 #define CONTEXT_GUEST_END	2
112 
113 #define VSID_REAL	0x07ffffffffc00000ULL
114 #define VSID_BAT	0x07ffffffffb00000ULL
115 #define VSID_64K	0x0800000000000000ULL
116 #define VSID_1T		0x1000000000000000ULL
117 #define VSID_REAL_DR	0x2000000000000000ULL
118 #define VSID_REAL_IR	0x4000000000000000ULL
119 #define VSID_PR		0x8000000000000000ULL
120 
121 extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
122 extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
123 extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
124 extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
125 extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
126 extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
127 extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
128 extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
129 			       bool iswrite);
130 extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
131 extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
132 extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
133 extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
134 extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
135 			struct kvm_vcpu *vcpu, unsigned long addr,
136 			unsigned long status);
137 extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
138 			unsigned long slb_v, unsigned long valid);
139 
140 extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
141 extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
142 extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
143 extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
144 extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
145 extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
146 extern int kvmppc_mmu_hpte_sysinit(void);
147 extern void kvmppc_mmu_hpte_sysexit(void);
148 extern int kvmppc_mmu_hv_init(void);
149 extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc);
150 
151 /* XXX remove this export when load_last_inst() is generic */
152 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
153 extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
154 extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
155 					  unsigned int vec);
156 extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
157 extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
158 			   bool upper, u32 val);
159 extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
160 extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
161 extern pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
162 			bool *writable);
163 extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
164 			unsigned long *rmap, long pte_index, int realmode);
165 extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep,
166 			unsigned long pte_index);
167 void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep,
168 			unsigned long pte_index);
169 extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
170 			unsigned long *nb_ret);
171 extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
172 			unsigned long gpa, bool dirty);
173 extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
174 			long pte_index, unsigned long pteh, unsigned long ptel,
175 			pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
176 extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
177 			unsigned long pte_index, unsigned long avpn,
178 			unsigned long *hpret);
179 extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
180 			struct kvm_memory_slot *memslot, unsigned long *map);
181 extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
182 			unsigned long mask);
183 extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
184 
185 extern void kvmppc_entry_trampoline(void);
186 extern void kvmppc_hv_entry_trampoline(void);
187 extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
188 extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
189 extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
190 extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
191 extern int kvmppc_hcall_impl_pr(unsigned long cmd);
192 extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
193 extern void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
194 				 struct kvm_vcpu *vcpu);
195 extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
196 				   struct kvmppc_book3s_shadow_vcpu *svcpu);
197 
198 static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
199 {
200 	return vcpu->arch.book3s;
201 }
202 
203 /* Also add subarch specific defines */
204 
205 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
206 #include <asm/kvm_book3s_32.h>
207 #endif
208 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
209 #include <asm/kvm_book3s_64.h>
210 #endif
211 
212 static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
213 {
214 	vcpu->arch.gpr[num] = val;
215 }
216 
217 static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
218 {
219 	return vcpu->arch.gpr[num];
220 }
221 
222 static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
223 {
224 	vcpu->arch.cr = val;
225 }
226 
227 static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
228 {
229 	return vcpu->arch.cr;
230 }
231 
232 static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
233 {
234 	vcpu->arch.xer = val;
235 }
236 
237 static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
238 {
239 	return vcpu->arch.xer;
240 }
241 
242 static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
243 {
244 	vcpu->arch.ctr = val;
245 }
246 
247 static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
248 {
249 	return vcpu->arch.ctr;
250 }
251 
252 static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
253 {
254 	vcpu->arch.lr = val;
255 }
256 
257 static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
258 {
259 	return vcpu->arch.lr;
260 }
261 
262 static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
263 {
264 	vcpu->arch.pc = val;
265 }
266 
267 static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
268 {
269 	return vcpu->arch.pc;
270 }
271 
272 static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu);
273 static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
274 {
275 	return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE);
276 }
277 
278 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
279 {
280 	return vcpu->arch.fault_dar;
281 }
282 
283 static inline bool is_kvmppc_resume_guest(int r)
284 {
285 	return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
286 }
287 
288 static inline bool is_kvmppc_hv_enabled(struct kvm *kvm);
289 static inline bool kvmppc_supports_magic_page(struct kvm_vcpu *vcpu)
290 {
291 	/* Only PR KVM supports the magic page */
292 	return !is_kvmppc_hv_enabled(vcpu->kvm);
293 }
294 
295 /* Magic register values loaded into r3 and r4 before the 'sc' assembly
296  * instruction for the OSI hypercalls */
297 #define OSI_SC_MAGIC_R3			0x113724FA
298 #define OSI_SC_MAGIC_R4			0x77810F9B
299 
300 #define INS_DCBZ			0x7c0007ec
301 /* TO = 31 for unconditional trap */
302 #define INS_TW				0x7fe00008
303 
304 /* LPIDs we support with this build -- runtime limit may be lower */
305 #define KVMPPC_NR_LPIDS			(LPID_RSVD + 1)
306 
307 #define SPLIT_HACK_MASK			0xff000000
308 #define SPLIT_HACK_OFFS			0xfb000000
309 
310 #endif /* __ASM_KVM_BOOK3S_H__ */
311