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 VSID_REAL	0x07ffffffffc00000ULL
110 #define VSID_BAT	0x07ffffffffb00000ULL
111 #define VSID_64K	0x0800000000000000ULL
112 #define VSID_1T		0x1000000000000000ULL
113 #define VSID_REAL_DR	0x2000000000000000ULL
114 #define VSID_REAL_IR	0x4000000000000000ULL
115 #define VSID_PR		0x8000000000000000ULL
116 
117 extern void kvmppc_mmu_pte_flush(struct kvm_vcpu *vcpu, ulong ea, ulong ea_mask);
118 extern void kvmppc_mmu_pte_vflush(struct kvm_vcpu *vcpu, u64 vp, u64 vp_mask);
119 extern void kvmppc_mmu_pte_pflush(struct kvm_vcpu *vcpu, ulong pa_start, ulong pa_end);
120 extern void kvmppc_set_msr(struct kvm_vcpu *vcpu, u64 new_msr);
121 extern void kvmppc_mmu_book3s_64_init(struct kvm_vcpu *vcpu);
122 extern void kvmppc_mmu_book3s_32_init(struct kvm_vcpu *vcpu);
123 extern void kvmppc_mmu_book3s_hv_init(struct kvm_vcpu *vcpu);
124 extern int kvmppc_mmu_map_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte,
125 			       bool iswrite);
126 extern void kvmppc_mmu_unmap_page(struct kvm_vcpu *vcpu, struct kvmppc_pte *pte);
127 extern int kvmppc_mmu_map_segment(struct kvm_vcpu *vcpu, ulong eaddr);
128 extern void kvmppc_mmu_flush_segment(struct kvm_vcpu *vcpu, ulong eaddr, ulong seg_size);
129 extern void kvmppc_mmu_flush_segments(struct kvm_vcpu *vcpu);
130 extern int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
131 			struct kvm_vcpu *vcpu, unsigned long addr,
132 			unsigned long status);
133 extern long kvmppc_hv_find_lock_hpte(struct kvm *kvm, gva_t eaddr,
134 			unsigned long slb_v, unsigned long valid);
135 
136 extern void kvmppc_mmu_hpte_cache_map(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
137 extern struct hpte_cache *kvmppc_mmu_hpte_cache_next(struct kvm_vcpu *vcpu);
138 extern void kvmppc_mmu_hpte_cache_free(struct hpte_cache *pte);
139 extern void kvmppc_mmu_hpte_destroy(struct kvm_vcpu *vcpu);
140 extern int kvmppc_mmu_hpte_init(struct kvm_vcpu *vcpu);
141 extern void kvmppc_mmu_invalidate_pte(struct kvm_vcpu *vcpu, struct hpte_cache *pte);
142 extern int kvmppc_mmu_hpte_sysinit(void);
143 extern void kvmppc_mmu_hpte_sysexit(void);
144 extern int kvmppc_mmu_hv_init(void);
145 extern int kvmppc_book3s_hcall_implemented(struct kvm *kvm, unsigned long hc);
146 
147 /* XXX remove this export when load_last_inst() is generic */
148 extern int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr, bool data);
149 extern void kvmppc_book3s_queue_irqprio(struct kvm_vcpu *vcpu, unsigned int vec);
150 extern void kvmppc_book3s_dequeue_irqprio(struct kvm_vcpu *vcpu,
151 					  unsigned int vec);
152 extern void kvmppc_inject_interrupt(struct kvm_vcpu *vcpu, int vec, u64 flags);
153 extern void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat,
154 			   bool upper, u32 val);
155 extern void kvmppc_giveup_ext(struct kvm_vcpu *vcpu, ulong msr);
156 extern int kvmppc_emulate_paired_single(struct kvm_run *run, struct kvm_vcpu *vcpu);
157 extern pfn_t kvmppc_gpa_to_pfn(struct kvm_vcpu *vcpu, gpa_t gpa, bool writing,
158 			bool *writable);
159 extern void kvmppc_add_revmap_chain(struct kvm *kvm, struct revmap_entry *rev,
160 			unsigned long *rmap, long pte_index, int realmode);
161 extern void kvmppc_invalidate_hpte(struct kvm *kvm, __be64 *hptep,
162 			unsigned long pte_index);
163 void kvmppc_clear_ref_hpte(struct kvm *kvm, __be64 *hptep,
164 			unsigned long pte_index);
165 extern void *kvmppc_pin_guest_page(struct kvm *kvm, unsigned long addr,
166 			unsigned long *nb_ret);
167 extern void kvmppc_unpin_guest_page(struct kvm *kvm, void *addr,
168 			unsigned long gpa, bool dirty);
169 extern long kvmppc_do_h_enter(struct kvm *kvm, unsigned long flags,
170 			long pte_index, unsigned long pteh, unsigned long ptel,
171 			pgd_t *pgdir, bool realmode, unsigned long *idx_ret);
172 extern long kvmppc_do_h_remove(struct kvm *kvm, unsigned long flags,
173 			unsigned long pte_index, unsigned long avpn,
174 			unsigned long *hpret);
175 extern long kvmppc_hv_get_dirty_log(struct kvm *kvm,
176 			struct kvm_memory_slot *memslot, unsigned long *map);
177 extern void kvmppc_update_lpcr(struct kvm *kvm, unsigned long lpcr,
178 			unsigned long mask);
179 extern void kvmppc_set_fscr(struct kvm_vcpu *vcpu, u64 fscr);
180 
181 extern void kvmppc_entry_trampoline(void);
182 extern void kvmppc_hv_entry_trampoline(void);
183 extern u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst);
184 extern ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst);
185 extern int kvmppc_h_pr(struct kvm_vcpu *vcpu, unsigned long cmd);
186 extern void kvmppc_pr_init_default_hcalls(struct kvm *kvm);
187 extern int kvmppc_hcall_impl_pr(unsigned long cmd);
188 extern int kvmppc_hcall_impl_hv_realmode(unsigned long cmd);
189 extern void kvmppc_copy_to_svcpu(struct kvmppc_book3s_shadow_vcpu *svcpu,
190 				 struct kvm_vcpu *vcpu);
191 extern void kvmppc_copy_from_svcpu(struct kvm_vcpu *vcpu,
192 				   struct kvmppc_book3s_shadow_vcpu *svcpu);
193 
194 static inline struct kvmppc_vcpu_book3s *to_book3s(struct kvm_vcpu *vcpu)
195 {
196 	return vcpu->arch.book3s;
197 }
198 
199 /* Also add subarch specific defines */
200 
201 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
202 #include <asm/kvm_book3s_32.h>
203 #endif
204 #ifdef CONFIG_KVM_BOOK3S_64_HANDLER
205 #include <asm/kvm_book3s_64.h>
206 #endif
207 
208 static inline void kvmppc_set_gpr(struct kvm_vcpu *vcpu, int num, ulong val)
209 {
210 	vcpu->arch.gpr[num] = val;
211 }
212 
213 static inline ulong kvmppc_get_gpr(struct kvm_vcpu *vcpu, int num)
214 {
215 	return vcpu->arch.gpr[num];
216 }
217 
218 static inline void kvmppc_set_cr(struct kvm_vcpu *vcpu, u32 val)
219 {
220 	vcpu->arch.cr = val;
221 }
222 
223 static inline u32 kvmppc_get_cr(struct kvm_vcpu *vcpu)
224 {
225 	return vcpu->arch.cr;
226 }
227 
228 static inline void kvmppc_set_xer(struct kvm_vcpu *vcpu, u32 val)
229 {
230 	vcpu->arch.xer = val;
231 }
232 
233 static inline u32 kvmppc_get_xer(struct kvm_vcpu *vcpu)
234 {
235 	return vcpu->arch.xer;
236 }
237 
238 static inline void kvmppc_set_ctr(struct kvm_vcpu *vcpu, ulong val)
239 {
240 	vcpu->arch.ctr = val;
241 }
242 
243 static inline ulong kvmppc_get_ctr(struct kvm_vcpu *vcpu)
244 {
245 	return vcpu->arch.ctr;
246 }
247 
248 static inline void kvmppc_set_lr(struct kvm_vcpu *vcpu, ulong val)
249 {
250 	vcpu->arch.lr = val;
251 }
252 
253 static inline ulong kvmppc_get_lr(struct kvm_vcpu *vcpu)
254 {
255 	return vcpu->arch.lr;
256 }
257 
258 static inline void kvmppc_set_pc(struct kvm_vcpu *vcpu, ulong val)
259 {
260 	vcpu->arch.pc = val;
261 }
262 
263 static inline ulong kvmppc_get_pc(struct kvm_vcpu *vcpu)
264 {
265 	return vcpu->arch.pc;
266 }
267 
268 static inline u64 kvmppc_get_msr(struct kvm_vcpu *vcpu);
269 static inline bool kvmppc_need_byteswap(struct kvm_vcpu *vcpu)
270 {
271 	return (kvmppc_get_msr(vcpu) & MSR_LE) != (MSR_KERNEL & MSR_LE);
272 }
273 
274 static inline ulong kvmppc_get_fault_dar(struct kvm_vcpu *vcpu)
275 {
276 	return vcpu->arch.fault_dar;
277 }
278 
279 static inline bool is_kvmppc_resume_guest(int r)
280 {
281 	return (r == RESUME_GUEST || r == RESUME_GUEST_NV);
282 }
283 
284 static inline bool is_kvmppc_hv_enabled(struct kvm *kvm);
285 static inline bool kvmppc_supports_magic_page(struct kvm_vcpu *vcpu)
286 {
287 	/* Only PR KVM supports the magic page */
288 	return !is_kvmppc_hv_enabled(vcpu->kvm);
289 }
290 
291 extern int kvmppc_h_logical_ci_load(struct kvm_vcpu *vcpu);
292 extern int kvmppc_h_logical_ci_store(struct kvm_vcpu *vcpu);
293 
294 /* Magic register values loaded into r3 and r4 before the 'sc' assembly
295  * instruction for the OSI hypercalls */
296 #define OSI_SC_MAGIC_R3			0x113724FA
297 #define OSI_SC_MAGIC_R4			0x77810F9B
298 
299 #define INS_DCBZ			0x7c0007ec
300 /* TO = 31 for unconditional trap */
301 #define INS_TW				0x7fe00008
302 
303 /* LPIDs we support with this build -- runtime limit may be lower */
304 #define KVMPPC_NR_LPIDS			(LPID_RSVD + 1)
305 
306 #define SPLIT_HACK_MASK			0xff000000
307 #define SPLIT_HACK_OFFS			0xfb000000
308 
309 #endif /* __ASM_KVM_BOOK3S_H__ */
310