1 /* SPDX-License-Identifier: GPL-2.0-only */
2 /*
3 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
4 *
5 * Author: Yu Liu <yu.liu@freescale.com>
6 * Scott Wood <scottwood@freescale.com>
7 * Ashish Kalra <ashish.kalra@freescale.com>
8 * Varun Sethi <varun.sethi@freescale.com>
9 *
10 * Description:
11 * This file is based on arch/powerpc/kvm/44x_tlb.h and
12 * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>,
13 * Copyright IBM Corp. 2007-2008
14 */
15
16 #ifndef KVM_E500_H
17 #define KVM_E500_H
18
19 #include <linux/kvm_host.h>
20 #include <asm/nohash/mmu-e500.h>
21 #include <asm/tlb.h>
22 #include <asm/cputhreads.h>
23
24 enum vcpu_ftr {
25 VCPU_FTR_MMU_V2
26 };
27
28 #define E500_PID_NUM 3
29 #define E500_TLB_NUM 2
30
31 /* entry is mapped somewhere in host TLB */
32 #define E500_TLB_VALID (1 << 31)
33 /* TLB1 entry is mapped by host TLB1, tracked by bitmaps */
34 #define E500_TLB_BITMAP (1 << 30)
35 /* TLB1 entry is mapped by host TLB0 */
36 #define E500_TLB_TLB0 (1 << 29)
37 /* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */
38 #define E500_TLB_MAS2_ATTR (0x7f)
39
40 struct tlbe_ref {
41 kvm_pfn_t pfn; /* valid only for TLB0, except briefly */
42 unsigned int flags; /* E500_TLB_* */
43 };
44
45 struct tlbe_priv {
46 struct tlbe_ref ref;
47 };
48
49 #ifdef CONFIG_KVM_E500V2
50 struct vcpu_id_table;
51 #endif
52
53 struct kvmppc_e500_tlb_params {
54 int entries, ways, sets;
55 };
56
57 struct kvmppc_vcpu_e500 {
58 struct kvm_vcpu vcpu;
59
60 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
61 struct kvm_book3e_206_tlb_entry *gtlb_arch;
62
63 /* Starting entry number in gtlb_arch[] */
64 int gtlb_offset[E500_TLB_NUM];
65
66 /* KVM internal information associated with each guest TLB entry */
67 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
68
69 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
70
71 unsigned int gtlb_nv[E500_TLB_NUM];
72
73 unsigned int host_tlb1_nv;
74
75 u32 svr;
76 u32 l1csr0;
77 u32 l1csr1;
78 u32 hid0;
79 u32 hid1;
80 u64 mcar;
81
82 struct page **shared_tlb_pages;
83 int num_shared_tlb_pages;
84
85 u64 *g2h_tlb1_map;
86 unsigned int *h2g_tlb1_rmap;
87
88 /* Minimum and maximum address mapped my TLB1 */
89 unsigned long tlb1_min_eaddr;
90 unsigned long tlb1_max_eaddr;
91
92 #ifdef CONFIG_KVM_E500V2
93 u32 pid[E500_PID_NUM];
94
95 /* vcpu id table */
96 struct vcpu_id_table *idt;
97 #endif
98 };
99
100 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
101 {
102 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
103 }
104
105
106 /* This geometry is the legacy default -- can be overridden by userspace */
107 #define KVM_E500_TLB0_WAY_SIZE 128
108 #define KVM_E500_TLB0_WAY_NUM 2
109
110 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
111 #define KVM_E500_TLB1_SIZE 16
112
113 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
114 #define tlbsel_of(index) ((index) >> 16)
115 #define esel_of(index) ((index) & 0xFFFF)
116
117 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
118 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
119 #define MAS2_ATTRIB_MASK \
120 (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G)
121 #define MAS3_ATTRIB_MASK \
122 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
123 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
124
125 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
126 ulong value);
127 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
128 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
129 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea);
130 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea);
131 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea);
132 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
133 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
134
135 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
136 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
137
138 int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
139 union kvmppc_one_reg *val);
140 int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
141 union kvmppc_one_reg *val);
142
143 #ifdef CONFIG_KVM_E500V2
144 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
145 unsigned int as, unsigned int gid,
146 unsigned int pr, int avoid_recursion);
147 #endif
148
149 /* TLB helper functions */
150 static inline unsigned int
151 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
152 {
153 return (tlbe->mas1 >> 7) & 0x1f;
154 }
155
156 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
157 {
158 return tlbe->mas2 & MAS2_EPN;
159 }
160
161 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
162 {
163 unsigned int pgsize = get_tlb_size(tlbe);
164 return 1ULL << 10 << pgsize;
165 }
166
167 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
168 {
169 u64 bytes = get_tlb_bytes(tlbe);
170 return get_tlb_eaddr(tlbe) + bytes - 1;
171 }
172
173 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
174 {
175 return tlbe->mas7_3 & ~0xfffULL;
176 }
177
178 static inline unsigned int
179 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
180 {
181 return (tlbe->mas1 >> 16) & 0xff;
182 }
183
184 static inline unsigned int
185 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
186 {
187 return (tlbe->mas1 >> 12) & 0x1;
188 }
189
190 static inline unsigned int
191 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
192 {
193 return (tlbe->mas1 >> 31) & 0x1;
194 }
195
196 static inline unsigned int
197 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
198 {
199 return (tlbe->mas1 >> 30) & 0x1;
200 }
201
202 static inline unsigned int
203 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
204 {
205 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
206 }
207
208 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
209 {
210 return vcpu->arch.pid & 0xff;
211 }
212
213 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
214 {
215 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
216 }
217
218 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
219 {
220 return !!(vcpu->arch.shared->msr & MSR_PR);
221 }
222
223 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
224 {
225 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
226 }
227
228 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
229 {
230 return vcpu->arch.shared->mas6 & 0x1;
231 }
232
233 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
234 {
235 /*
236 * Manual says that tlbsel has 2 bits wide.
237 * Since we only have two TLBs, only lower bit is used.
238 */
239 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
240 }
241
242 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
243 {
244 return vcpu->arch.shared->mas0 & 0xfff;
245 }
246
247 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
248 {
249 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
250 }
251
252 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
253 const struct kvm_book3e_206_tlb_entry *tlbe)
254 {
255 gpa_t gpa;
256
257 if (!get_tlb_v(tlbe))
258 return 0;
259
260 #ifndef CONFIG_KVM_BOOKE_HV
261 /* Does it match current guest AS? */
262 /* XXX what about IS != DS? */
263 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
264 return 0;
265 #endif
266
267 gpa = get_tlb_raddr(tlbe);
268 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
269 /* Mapping is not for RAM. */
270 return 0;
271
272 return 1;
273 }
274
275 static inline struct kvm_book3e_206_tlb_entry *get_entry(
276 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
277 {
278 int offset = vcpu_e500->gtlb_offset[tlbsel];
279 return &vcpu_e500->gtlb_arch[offset + entry];
280 }
281
282 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
283 struct kvm_book3e_206_tlb_entry *gtlbe);
284 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
285
286 #ifdef CONFIG_KVM_BOOKE_HV
287 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe)
288 #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu)
289 #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS)
290
291 /*
292 * These functions should be called with preemption disabled
293 * and the returned value is valid only in that context
294 */
295 static inline int get_thread_specific_lpid(int vm_lpid)
296 {
297 int vcpu_lpid = vm_lpid;
298
299 if (threads_per_core == 2)
300 vcpu_lpid |= smp_processor_id() & 1;
301
302 return vcpu_lpid;
303 }
304
305 static inline int get_lpid(struct kvm_vcpu *vcpu)
306 {
307 return get_thread_specific_lpid(vcpu->kvm->arch.lpid);
308 }
309 #else
310 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
311 struct kvm_book3e_206_tlb_entry *gtlbe);
312
313 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
314 {
315 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
316 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
317
318 return vcpu_e500->pid[tidseld];
319 }
320
321 /* Force TS=1 for all guest mappings. */
322 #define get_tlb_sts(gtlbe) (MAS1_TS)
323 #endif /* !BOOKE_HV */
324
325 static inline bool has_feature(const struct kvm_vcpu *vcpu,
326 enum vcpu_ftr ftr)
327 {
328 bool has_ftr;
329 switch (ftr) {
330 case VCPU_FTR_MMU_V2:
331 has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2);
332 break;
333 default:
334 return false;
335 }
336 return has_ftr;
337 }
338
339 #endif /* KVM_E500_H */
340
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