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 /* entry is writable on the host */
38 #define E500_TLB_WRITABLE (1 << 28)
39 /* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */
40 #define E500_TLB_MAS2_ATTR (0x7f)
41
42 struct tlbe_priv {
43 kvm_pfn_t pfn; /* valid only for TLB0, except briefly */
44 unsigned int flags; /* E500_TLB_* */
45 };
46
47 #ifdef CONFIG_KVM_E500V2
48 struct vcpu_id_table;
49 #endif
50
51 struct kvmppc_e500_tlb_params {
52 int entries, ways, sets;
53 };
54
55 struct kvmppc_vcpu_e500 {
56 struct kvm_vcpu vcpu;
57
58 /* Unmodified copy of the guest's TLB -- shared with host userspace. */
59 struct kvm_book3e_206_tlb_entry *gtlb_arch;
60
61 /* Starting entry number in gtlb_arch[] */
62 int gtlb_offset[E500_TLB_NUM];
63
64 /* KVM internal information associated with each guest TLB entry */
65 struct tlbe_priv *gtlb_priv[E500_TLB_NUM];
66
67 struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM];
68
69 unsigned int gtlb_nv[E500_TLB_NUM];
70
71 unsigned int host_tlb1_nv;
72
73 u32 svr;
74 u32 l1csr0;
75 u32 l1csr1;
76 u32 hid0;
77 u32 hid1;
78 u64 mcar;
79
80 struct page **shared_tlb_pages;
81 int num_shared_tlb_pages;
82
83 u64 *g2h_tlb1_map;
84 unsigned int *h2g_tlb1_rmap;
85
86 /* Minimum and maximum address mapped my TLB1 */
87 unsigned long tlb1_min_eaddr;
88 unsigned long tlb1_max_eaddr;
89
90 #ifdef CONFIG_KVM_E500V2
91 u32 pid[E500_PID_NUM];
92
93 /* vcpu id table */
94 struct vcpu_id_table *idt;
95 #endif
96 };
97
to_e500(struct kvm_vcpu * vcpu)98 static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu)
99 {
100 return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu);
101 }
102
103
104 /* This geometry is the legacy default -- can be overridden by userspace */
105 #define KVM_E500_TLB0_WAY_SIZE 128
106 #define KVM_E500_TLB0_WAY_NUM 2
107
108 #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
109 #define KVM_E500_TLB1_SIZE 16
110
111 #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
112 #define tlbsel_of(index) ((index) >> 16)
113 #define esel_of(index) ((index) & 0xFFFF)
114
115 #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
116 #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
117 #define MAS2_ATTRIB_MASK \
118 (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G)
119 #define MAS3_ATTRIB_MASK \
120 (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
121 | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
122
123 int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500,
124 ulong value);
125 int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu);
126 int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu);
127 int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea);
128 int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea);
129 int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea);
130 int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500);
131 void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500);
132
133 void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
134 int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
135
136 int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
137 union kvmppc_one_reg *val);
138 int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id,
139 union kvmppc_one_reg *val);
140
141 #ifdef CONFIG_KVM_E500V2
142 unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500,
143 unsigned int as, unsigned int gid,
144 unsigned int pr, int avoid_recursion);
145 #endif
146
147 /* TLB helper functions */
148 static inline unsigned int
get_tlb_size(const struct kvm_book3e_206_tlb_entry * tlbe)149 get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe)
150 {
151 return (tlbe->mas1 >> 7) & 0x1f;
152 }
153
get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry * tlbe)154 static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe)
155 {
156 return tlbe->mas2 & MAS2_EPN;
157 }
158
get_tlb_bytes(const struct kvm_book3e_206_tlb_entry * tlbe)159 static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe)
160 {
161 unsigned int pgsize = get_tlb_size(tlbe);
162 return 1ULL << 10 << pgsize;
163 }
164
get_tlb_end(const struct kvm_book3e_206_tlb_entry * tlbe)165 static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe)
166 {
167 u64 bytes = get_tlb_bytes(tlbe);
168 return get_tlb_eaddr(tlbe) + bytes - 1;
169 }
170
get_tlb_raddr(const struct kvm_book3e_206_tlb_entry * tlbe)171 static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe)
172 {
173 return tlbe->mas7_3 & ~0xfffULL;
174 }
175
176 static inline unsigned int
get_tlb_tid(const struct kvm_book3e_206_tlb_entry * tlbe)177 get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe)
178 {
179 return (tlbe->mas1 >> 16) & 0xff;
180 }
181
182 static inline unsigned int
get_tlb_ts(const struct kvm_book3e_206_tlb_entry * tlbe)183 get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe)
184 {
185 return (tlbe->mas1 >> 12) & 0x1;
186 }
187
188 static inline unsigned int
get_tlb_v(const struct kvm_book3e_206_tlb_entry * tlbe)189 get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe)
190 {
191 return (tlbe->mas1 >> 31) & 0x1;
192 }
193
194 static inline unsigned int
get_tlb_iprot(const struct kvm_book3e_206_tlb_entry * tlbe)195 get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe)
196 {
197 return (tlbe->mas1 >> 30) & 0x1;
198 }
199
200 static inline unsigned int
get_tlb_tsize(const struct kvm_book3e_206_tlb_entry * tlbe)201 get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe)
202 {
203 return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT;
204 }
205
get_cur_pid(struct kvm_vcpu * vcpu)206 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
207 {
208 return vcpu->arch.pid & 0xff;
209 }
210
get_cur_as(struct kvm_vcpu * vcpu)211 static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
212 {
213 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
214 }
215
get_cur_pr(struct kvm_vcpu * vcpu)216 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
217 {
218 return !!(vcpu->arch.shared->msr & MSR_PR);
219 }
220
get_cur_spid(const struct kvm_vcpu * vcpu)221 static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu)
222 {
223 return (vcpu->arch.shared->mas6 >> 16) & 0xff;
224 }
225
get_cur_sas(const struct kvm_vcpu * vcpu)226 static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu)
227 {
228 return vcpu->arch.shared->mas6 & 0x1;
229 }
230
get_tlb_tlbsel(const struct kvm_vcpu * vcpu)231 static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu)
232 {
233 /*
234 * Manual says that tlbsel has 2 bits wide.
235 * Since we only have two TLBs, only lower bit is used.
236 */
237 return (vcpu->arch.shared->mas0 >> 28) & 0x1;
238 }
239
get_tlb_nv_bit(const struct kvm_vcpu * vcpu)240 static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu)
241 {
242 return vcpu->arch.shared->mas0 & 0xfff;
243 }
244
get_tlb_esel_bit(const struct kvm_vcpu * vcpu)245 static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu)
246 {
247 return (vcpu->arch.shared->mas0 >> 16) & 0xfff;
248 }
249
tlbe_is_host_safe(const struct kvm_vcpu * vcpu,const struct kvm_book3e_206_tlb_entry * tlbe)250 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
251 const struct kvm_book3e_206_tlb_entry *tlbe)
252 {
253 gpa_t gpa;
254
255 if (!get_tlb_v(tlbe))
256 return 0;
257
258 #ifndef CONFIG_KVM_BOOKE_HV
259 /* Does it match current guest AS? */
260 /* XXX what about IS != DS? */
261 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
262 return 0;
263 #endif
264
265 gpa = get_tlb_raddr(tlbe);
266 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
267 /* Mapping is not for RAM. */
268 return 0;
269
270 return 1;
271 }
272
get_entry(struct kvmppc_vcpu_e500 * vcpu_e500,int tlbsel,int entry)273 static inline struct kvm_book3e_206_tlb_entry *get_entry(
274 struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry)
275 {
276 int offset = vcpu_e500->gtlb_offset[tlbsel];
277 return &vcpu_e500->gtlb_arch[offset + entry];
278 }
279
280 void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500,
281 struct kvm_book3e_206_tlb_entry *gtlbe);
282 void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500);
283
284 #ifdef CONFIG_KVM_BOOKE_HV
285 #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe)
286 #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu)
287 #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS)
288
289 /*
290 * These functions should be called with preemption disabled
291 * and the returned value is valid only in that context
292 */
get_thread_specific_lpid(int vm_lpid)293 static inline int get_thread_specific_lpid(int vm_lpid)
294 {
295 int vcpu_lpid = vm_lpid;
296
297 if (threads_per_core == 2)
298 vcpu_lpid |= smp_processor_id() & 1;
299
300 return vcpu_lpid;
301 }
302
get_lpid(struct kvm_vcpu * vcpu)303 static inline int get_lpid(struct kvm_vcpu *vcpu)
304 {
305 return get_thread_specific_lpid(vcpu->kvm->arch.lpid);
306 }
307 #else
308 unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu,
309 struct kvm_book3e_206_tlb_entry *gtlbe);
310
get_tlbmiss_tid(struct kvm_vcpu * vcpu)311 static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu)
312 {
313 struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
314 unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf;
315
316 return vcpu_e500->pid[tidseld];
317 }
318
319 /* Force TS=1 for all guest mappings. */
320 #define get_tlb_sts(gtlbe) (MAS1_TS)
321 #endif /* !BOOKE_HV */
322
has_feature(const struct kvm_vcpu * vcpu,enum vcpu_ftr ftr)323 static inline bool has_feature(const struct kvm_vcpu *vcpu,
324 enum vcpu_ftr ftr)
325 {
326 bool has_ftr;
327 switch (ftr) {
328 case VCPU_FTR_MMU_V2:
329 has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2);
330 break;
331 default:
332 return false;
333 }
334 return has_ftr;
335 }
336
337 #endif /* KVM_E500_H */
338