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bc8080cb | 1 | /* |
dd9ebf1f | 2 | * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. |
bc8080cb | 3 | * |
fc6cf995 | 4 | * Author: Yu Liu <yu.liu@freescale.com> |
73196cd3 | 5 | * Scott Wood <scottwood@freescale.com> |
4f802fe9 | 6 | * Ashish Kalra <ashish.kalra@freescale.com> |
73196cd3 | 7 | * Varun Sethi <varun.sethi@freescale.com> |
bc8080cb HB |
8 | * |
9 | * Description: | |
fc6cf995 SW |
10 | * This file is based on arch/powerpc/kvm/44x_tlb.h and |
11 | * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>, | |
12 | * Copyright IBM Corp. 2007-2008 | |
bc8080cb HB |
13 | * |
14 | * This program is free software; you can redistribute it and/or modify | |
15 | * it under the terms of the GNU General Public License, version 2, as | |
16 | * published by the Free Software Foundation. | |
17 | */ | |
18 | ||
29a5a6f9 SW |
19 | #ifndef KVM_E500_H |
20 | #define KVM_E500_H | |
bc8080cb HB |
21 | |
22 | #include <linux/kvm_host.h> | |
0cfb50e5 | 23 | #include <asm/mmu-book3e.h> |
bc8080cb | 24 | #include <asm/tlb.h> |
188e267c | 25 | #include <asm/cputhreads.h> |
fc6cf995 | 26 | |
307d9008 MC |
27 | enum vcpu_ftr { |
28 | VCPU_FTR_MMU_V2 | |
29 | }; | |
30 | ||
fc6cf995 SW |
31 | #define E500_PID_NUM 3 |
32 | #define E500_TLB_NUM 2 | |
33 | ||
47bf3797 | 34 | /* entry is mapped somewhere in host TLB */ |
08c9a188 | 35 | #define E500_TLB_VALID (1 << 31) |
47bf3797 | 36 | /* TLB1 entry is mapped by host TLB1, tracked by bitmaps */ |
08c9a188 | 37 | #define E500_TLB_BITMAP (1 << 30) |
47bf3797 | 38 | /* TLB1 entry is mapped by host TLB0 */ |
08c9a188 BB |
39 | #define E500_TLB_TLB0 (1 << 29) |
40 | /* bits [6-5] MAS2_X1 and MAS2_X0 and [4-0] bits for WIMGE */ | |
41 | #define E500_TLB_MAS2_ATTR (0x7f) | |
fc6cf995 SW |
42 | |
43 | struct tlbe_ref { | |
ba049e93 | 44 | kvm_pfn_t pfn; /* valid only for TLB0, except briefly */ |
47bf3797 | 45 | unsigned int flags; /* E500_TLB_* */ |
fc6cf995 SW |
46 | }; |
47 | ||
48 | struct tlbe_priv { | |
47bf3797 | 49 | struct tlbe_ref ref; |
fc6cf995 SW |
50 | }; |
51 | ||
bf7ca4bd | 52 | #ifdef CONFIG_KVM_E500V2 |
fc6cf995 | 53 | struct vcpu_id_table; |
8fdd21a2 | 54 | #endif |
fc6cf995 SW |
55 | |
56 | struct kvmppc_e500_tlb_params { | |
57 | int entries, ways, sets; | |
58 | }; | |
59 | ||
60 | struct kvmppc_vcpu_e500 { | |
52e1718c SW |
61 | struct kvm_vcpu vcpu; |
62 | ||
fc6cf995 SW |
63 | /* Unmodified copy of the guest's TLB -- shared with host userspace. */ |
64 | struct kvm_book3e_206_tlb_entry *gtlb_arch; | |
65 | ||
66 | /* Starting entry number in gtlb_arch[] */ | |
67 | int gtlb_offset[E500_TLB_NUM]; | |
68 | ||
69 | /* KVM internal information associated with each guest TLB entry */ | |
70 | struct tlbe_priv *gtlb_priv[E500_TLB_NUM]; | |
71 | ||
72 | struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM]; | |
73 | ||
74 | unsigned int gtlb_nv[E500_TLB_NUM]; | |
75 | ||
fc6cf995 SW |
76 | unsigned int host_tlb1_nv; |
77 | ||
fc6cf995 | 78 | u32 svr; |
fc6cf995 SW |
79 | u32 l1csr0; |
80 | u32 l1csr1; | |
81 | u32 hid0; | |
82 | u32 hid1; | |
fc6cf995 SW |
83 | u64 mcar; |
84 | ||
85 | struct page **shared_tlb_pages; | |
86 | int num_shared_tlb_pages; | |
8fdd21a2 | 87 | |
4f802fe9 SW |
88 | u64 *g2h_tlb1_map; |
89 | unsigned int *h2g_tlb1_rmap; | |
90 | ||
cc902ad4 BB |
91 | /* Minimum and maximum address mapped my TLB1 */ |
92 | unsigned long tlb1_min_eaddr; | |
93 | unsigned long tlb1_max_eaddr; | |
94 | ||
bf7ca4bd | 95 | #ifdef CONFIG_KVM_E500V2 |
8fdd21a2 SW |
96 | u32 pid[E500_PID_NUM]; |
97 | ||
98 | /* vcpu id table */ | |
99 | struct vcpu_id_table *idt; | |
100 | #endif | |
fc6cf995 SW |
101 | }; |
102 | ||
103 | static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu) | |
104 | { | |
105 | return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu); | |
106 | } | |
bc8080cb | 107 | |
73196cd3 | 108 | |
dc83b8bc SW |
109 | /* This geometry is the legacy default -- can be overridden by userspace */ |
110 | #define KVM_E500_TLB0_WAY_SIZE 128 | |
111 | #define KVM_E500_TLB0_WAY_NUM 2 | |
bc8080cb HB |
112 | |
113 | #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) | |
114 | #define KVM_E500_TLB1_SIZE 16 | |
115 | ||
116 | #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) | |
117 | #define tlbsel_of(index) ((index) >> 16) | |
118 | #define esel_of(index) ((index) & 0xFFFF) | |
119 | ||
120 | #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) | |
121 | #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) | |
122 | #define MAS2_ATTRIB_MASK \ | |
ca8ccbd4 | 123 | (MAS2_X0 | MAS2_X1 | MAS2_E | MAS2_G) |
bc8080cb HB |
124 | #define MAS3_ATTRIB_MASK \ |
125 | (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ | |
126 | | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) | |
127 | ||
52e1718c SW |
128 | int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, |
129 | ulong value); | |
130 | int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu); | |
131 | int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu); | |
7cdd7a95 MC |
132 | int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, gva_t ea); |
133 | int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int type, gva_t ea); | |
134 | int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, gva_t ea); | |
52e1718c SW |
135 | int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500); |
136 | void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500); | |
137 | ||
138 | void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); | |
139 | int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); | |
bc8080cb | 140 | |
a85d2aa2 MC |
141 | int kvmppc_get_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, |
142 | union kvmppc_one_reg *val); | |
143 | int kvmppc_set_one_reg_e500_tlb(struct kvm_vcpu *vcpu, u64 id, | |
144 | union kvmppc_one_reg *val); | |
8fdd21a2 | 145 | |
bf7ca4bd | 146 | #ifdef CONFIG_KVM_E500V2 |
8fdd21a2 SW |
147 | unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500, |
148 | unsigned int as, unsigned int gid, | |
149 | unsigned int pr, int avoid_recursion); | |
150 | #endif | |
151 | ||
bc8080cb | 152 | /* TLB helper functions */ |
dc83b8bc SW |
153 | static inline unsigned int |
154 | get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb | 155 | { |
0cfb50e5 | 156 | return (tlbe->mas1 >> 7) & 0x1f; |
bc8080cb HB |
157 | } |
158 | ||
dc83b8bc | 159 | static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb | 160 | { |
e9666ea1 | 161 | return tlbe->mas2 & MAS2_EPN; |
bc8080cb HB |
162 | } |
163 | ||
dc83b8bc | 164 | static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
165 | { |
166 | unsigned int pgsize = get_tlb_size(tlbe); | |
0cfb50e5 | 167 | return 1ULL << 10 << pgsize; |
bc8080cb HB |
168 | } |
169 | ||
dc83b8bc | 170 | static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
171 | { |
172 | u64 bytes = get_tlb_bytes(tlbe); | |
173 | return get_tlb_eaddr(tlbe) + bytes - 1; | |
174 | } | |
175 | ||
dc83b8bc | 176 | static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb | 177 | { |
dc83b8bc | 178 | return tlbe->mas7_3 & ~0xfffULL; |
bc8080cb HB |
179 | } |
180 | ||
dc83b8bc SW |
181 | static inline unsigned int |
182 | get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
183 | { |
184 | return (tlbe->mas1 >> 16) & 0xff; | |
185 | } | |
186 | ||
dc83b8bc SW |
187 | static inline unsigned int |
188 | get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
189 | { |
190 | return (tlbe->mas1 >> 12) & 0x1; | |
191 | } | |
192 | ||
dc83b8bc SW |
193 | static inline unsigned int |
194 | get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
195 | { |
196 | return (tlbe->mas1 >> 31) & 0x1; | |
197 | } | |
198 | ||
dc83b8bc SW |
199 | static inline unsigned int |
200 | get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
201 | { |
202 | return (tlbe->mas1 >> 30) & 0x1; | |
203 | } | |
204 | ||
8fdd21a2 SW |
205 | static inline unsigned int |
206 | get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe) | |
207 | { | |
208 | return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; | |
209 | } | |
210 | ||
bc8080cb HB |
211 | static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) |
212 | { | |
213 | return vcpu->arch.pid & 0xff; | |
214 | } | |
215 | ||
dd9ebf1f LY |
216 | static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) |
217 | { | |
218 | return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); | |
219 | } | |
220 | ||
221 | static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) | |
222 | { | |
223 | return !!(vcpu->arch.shared->msr & MSR_PR); | |
224 | } | |
225 | ||
b5904972 | 226 | static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) |
bc8080cb | 227 | { |
b5904972 | 228 | return (vcpu->arch.shared->mas6 >> 16) & 0xff; |
bc8080cb HB |
229 | } |
230 | ||
b5904972 | 231 | static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) |
bc8080cb | 232 | { |
b5904972 | 233 | return vcpu->arch.shared->mas6 & 0x1; |
bc8080cb HB |
234 | } |
235 | ||
b5904972 | 236 | static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) |
bc8080cb HB |
237 | { |
238 | /* | |
239 | * Manual says that tlbsel has 2 bits wide. | |
fb2838d4 | 240 | * Since we only have two TLBs, only lower bit is used. |
bc8080cb | 241 | */ |
b5904972 | 242 | return (vcpu->arch.shared->mas0 >> 28) & 0x1; |
bc8080cb HB |
243 | } |
244 | ||
b5904972 | 245 | static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 246 | { |
b5904972 | 247 | return vcpu->arch.shared->mas0 & 0xfff; |
bc8080cb HB |
248 | } |
249 | ||
b5904972 | 250 | static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 251 | { |
b5904972 | 252 | return (vcpu->arch.shared->mas0 >> 16) & 0xfff; |
bc8080cb HB |
253 | } |
254 | ||
bc8080cb | 255 | static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, |
dc83b8bc | 256 | const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
257 | { |
258 | gpa_t gpa; | |
259 | ||
260 | if (!get_tlb_v(tlbe)) | |
261 | return 0; | |
262 | ||
73196cd3 | 263 | #ifndef CONFIG_KVM_BOOKE_HV |
bc8080cb HB |
264 | /* Does it match current guest AS? */ |
265 | /* XXX what about IS != DS? */ | |
666e7252 | 266 | if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) |
bc8080cb | 267 | return 0; |
73196cd3 | 268 | #endif |
bc8080cb HB |
269 | |
270 | gpa = get_tlb_raddr(tlbe); | |
271 | if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) | |
272 | /* Mapping is not for RAM. */ | |
273 | return 0; | |
274 | ||
275 | return 1; | |
276 | } | |
277 | ||
8fdd21a2 SW |
278 | static inline struct kvm_book3e_206_tlb_entry *get_entry( |
279 | struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry) | |
280 | { | |
281 | int offset = vcpu_e500->gtlb_offset[tlbsel]; | |
282 | return &vcpu_e500->gtlb_arch[offset + entry]; | |
283 | } | |
284 | ||
285 | void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, | |
286 | struct kvm_book3e_206_tlb_entry *gtlbe); | |
287 | void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500); | |
288 | ||
73196cd3 SW |
289 | #ifdef CONFIG_KVM_BOOKE_HV |
290 | #define kvmppc_e500_get_tlb_stid(vcpu, gtlbe) get_tlb_tid(gtlbe) | |
291 | #define get_tlbmiss_tid(vcpu) get_cur_pid(vcpu) | |
292 | #define get_tlb_sts(gtlbe) (gtlbe->mas1 & MAS1_TS) | |
188e267c MC |
293 | |
294 | /* | |
295 | * These functions should be called with preemption disabled | |
296 | * and the returned value is valid only in that context | |
297 | */ | |
298 | static inline int get_thread_specific_lpid(int vm_lpid) | |
299 | { | |
300 | int vcpu_lpid = vm_lpid; | |
301 | ||
302 | if (threads_per_core == 2) | |
303 | vcpu_lpid |= smp_processor_id() & 1; | |
304 | ||
305 | return vcpu_lpid; | |
306 | } | |
307 | ||
308 | static inline int get_lpid(struct kvm_vcpu *vcpu) | |
309 | { | |
310 | return get_thread_specific_lpid(vcpu->kvm->arch.lpid); | |
311 | } | |
73196cd3 | 312 | #else |
8fdd21a2 SW |
313 | unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu, |
314 | struct kvm_book3e_206_tlb_entry *gtlbe); | |
315 | ||
316 | static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu) | |
317 | { | |
318 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
319 | unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf; | |
320 | ||
321 | return vcpu_e500->pid[tidseld]; | |
322 | } | |
323 | ||
324 | /* Force TS=1 for all guest mappings. */ | |
325 | #define get_tlb_sts(gtlbe) (MAS1_TS) | |
73196cd3 | 326 | #endif /* !BOOKE_HV */ |
8fdd21a2 | 327 | |
307d9008 MC |
328 | static inline bool has_feature(const struct kvm_vcpu *vcpu, |
329 | enum vcpu_ftr ftr) | |
330 | { | |
331 | bool has_ftr; | |
332 | switch (ftr) { | |
333 | case VCPU_FTR_MMU_V2: | |
334 | has_ftr = ((vcpu->arch.mmucfg & MMUCFG_MAVN) == MMUCFG_MAVN_V2); | |
335 | break; | |
336 | default: | |
337 | return false; | |
338 | } | |
339 | return has_ftr; | |
340 | } | |
341 | ||
29a5a6f9 | 342 | #endif /* KVM_E500_H */ |