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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> |
4f802fe9 | 5 | * Ashish Kalra <ashish.kalra@freescale.com> |
bc8080cb HB |
6 | * |
7 | * Description: | |
fc6cf995 SW |
8 | * This file is based on arch/powerpc/kvm/44x_tlb.h and |
9 | * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>, | |
10 | * Copyright IBM Corp. 2007-2008 | |
bc8080cb HB |
11 | * |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License, version 2, as | |
14 | * published by the Free Software Foundation. | |
15 | */ | |
16 | ||
29a5a6f9 SW |
17 | #ifndef KVM_E500_H |
18 | #define KVM_E500_H | |
bc8080cb HB |
19 | |
20 | #include <linux/kvm_host.h> | |
0cfb50e5 | 21 | #include <asm/mmu-book3e.h> |
bc8080cb | 22 | #include <asm/tlb.h> |
fc6cf995 SW |
23 | |
24 | #define E500_PID_NUM 3 | |
25 | #define E500_TLB_NUM 2 | |
26 | ||
27 | #define E500_TLB_VALID 1 | |
28 | #define E500_TLB_DIRTY 2 | |
4f802fe9 | 29 | #define E500_TLB_BITMAP 4 |
fc6cf995 SW |
30 | |
31 | struct tlbe_ref { | |
32 | pfn_t pfn; | |
33 | unsigned int flags; /* E500_TLB_* */ | |
34 | }; | |
35 | ||
36 | struct tlbe_priv { | |
37 | struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */ | |
38 | }; | |
39 | ||
8fdd21a2 | 40 | #ifdef CONFIG_KVM_E500 |
fc6cf995 | 41 | struct vcpu_id_table; |
8fdd21a2 | 42 | #endif |
fc6cf995 SW |
43 | |
44 | struct kvmppc_e500_tlb_params { | |
45 | int entries, ways, sets; | |
46 | }; | |
47 | ||
48 | struct kvmppc_vcpu_e500 { | |
52e1718c SW |
49 | struct kvm_vcpu vcpu; |
50 | ||
fc6cf995 SW |
51 | /* Unmodified copy of the guest's TLB -- shared with host userspace. */ |
52 | struct kvm_book3e_206_tlb_entry *gtlb_arch; | |
53 | ||
54 | /* Starting entry number in gtlb_arch[] */ | |
55 | int gtlb_offset[E500_TLB_NUM]; | |
56 | ||
57 | /* KVM internal information associated with each guest TLB entry */ | |
58 | struct tlbe_priv *gtlb_priv[E500_TLB_NUM]; | |
59 | ||
60 | struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM]; | |
61 | ||
62 | unsigned int gtlb_nv[E500_TLB_NUM]; | |
63 | ||
64 | /* | |
65 | * information associated with each host TLB entry -- | |
66 | * TLB1 only for now. If/when guest TLB1 entries can be | |
67 | * mapped with host TLB0, this will be used for that too. | |
68 | * | |
69 | * We don't want to use this for guest TLB0 because then we'd | |
70 | * have the overhead of doing the translation again even if | |
71 | * the entry is still in the guest TLB (e.g. we swapped out | |
72 | * and back, and our host TLB entries got evicted). | |
73 | */ | |
74 | struct tlbe_ref *tlb_refs[E500_TLB_NUM]; | |
75 | unsigned int host_tlb1_nv; | |
76 | ||
fc6cf995 | 77 | u32 svr; |
fc6cf995 SW |
78 | u32 l1csr0; |
79 | u32 l1csr1; | |
80 | u32 hid0; | |
81 | u32 hid1; | |
fc6cf995 SW |
82 | u64 mcar; |
83 | ||
84 | struct page **shared_tlb_pages; | |
85 | int num_shared_tlb_pages; | |
8fdd21a2 | 86 | |
4f802fe9 SW |
87 | u64 *g2h_tlb1_map; |
88 | unsigned int *h2g_tlb1_rmap; | |
89 | ||
8fdd21a2 SW |
90 | #ifdef CONFIG_KVM_E500 |
91 | u32 pid[E500_PID_NUM]; | |
92 | ||
93 | /* vcpu id table */ | |
94 | struct vcpu_id_table *idt; | |
95 | #endif | |
fc6cf995 SW |
96 | }; |
97 | ||
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 | } | |
bc8080cb | 102 | |
dc83b8bc SW |
103 | /* This geometry is the legacy default -- can be overridden by userspace */ |
104 | #define KVM_E500_TLB0_WAY_SIZE 128 | |
105 | #define KVM_E500_TLB0_WAY_NUM 2 | |
bc8080cb HB |
106 | |
107 | #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) | |
108 | #define KVM_E500_TLB1_SIZE 16 | |
109 | ||
110 | #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) | |
111 | #define tlbsel_of(index) ((index) >> 16) | |
112 | #define esel_of(index) ((index) & 0xFFFF) | |
113 | ||
114 | #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) | |
115 | #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) | |
116 | #define MAS2_ATTRIB_MASK \ | |
046a48b3 | 117 | (MAS2_X0 | MAS2_X1) |
bc8080cb HB |
118 | #define MAS3_ATTRIB_MASK \ |
119 | (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ | |
120 | | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) | |
121 | ||
52e1718c SW |
122 | int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, |
123 | ulong value); | |
124 | int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu); | |
125 | int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu); | |
126 | int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb); | |
ab9fc405 | 127 | int kvmppc_e500_emul_tlbilx(struct kvm_vcpu *vcpu, int rt, int ra, int rb); |
52e1718c | 128 | int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb); |
52e1718c SW |
129 | int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500); |
130 | void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500); | |
131 | ||
132 | void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); | |
133 | int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); | |
bc8080cb | 134 | |
8fdd21a2 SW |
135 | |
136 | #ifdef CONFIG_KVM_E500 | |
137 | unsigned int kvmppc_e500_get_sid(struct kvmppc_vcpu_e500 *vcpu_e500, | |
138 | unsigned int as, unsigned int gid, | |
139 | unsigned int pr, int avoid_recursion); | |
140 | #endif | |
141 | ||
bc8080cb | 142 | /* TLB helper functions */ |
dc83b8bc SW |
143 | static inline unsigned int |
144 | get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb | 145 | { |
0cfb50e5 | 146 | return (tlbe->mas1 >> 7) & 0x1f; |
bc8080cb HB |
147 | } |
148 | ||
dc83b8bc | 149 | static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
150 | { |
151 | return tlbe->mas2 & 0xfffff000; | |
152 | } | |
153 | ||
dc83b8bc | 154 | static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
155 | { |
156 | unsigned int pgsize = get_tlb_size(tlbe); | |
0cfb50e5 | 157 | return 1ULL << 10 << pgsize; |
bc8080cb HB |
158 | } |
159 | ||
dc83b8bc | 160 | static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
161 | { |
162 | u64 bytes = get_tlb_bytes(tlbe); | |
163 | return get_tlb_eaddr(tlbe) + bytes - 1; | |
164 | } | |
165 | ||
dc83b8bc | 166 | static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb | 167 | { |
dc83b8bc | 168 | return tlbe->mas7_3 & ~0xfffULL; |
bc8080cb HB |
169 | } |
170 | ||
dc83b8bc SW |
171 | static inline unsigned int |
172 | get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
173 | { |
174 | return (tlbe->mas1 >> 16) & 0xff; | |
175 | } | |
176 | ||
dc83b8bc SW |
177 | static inline unsigned int |
178 | get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
179 | { |
180 | return (tlbe->mas1 >> 12) & 0x1; | |
181 | } | |
182 | ||
dc83b8bc SW |
183 | static inline unsigned int |
184 | get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
185 | { |
186 | return (tlbe->mas1 >> 31) & 0x1; | |
187 | } | |
188 | ||
dc83b8bc SW |
189 | static inline unsigned int |
190 | get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
191 | { |
192 | return (tlbe->mas1 >> 30) & 0x1; | |
193 | } | |
194 | ||
8fdd21a2 SW |
195 | static inline unsigned int |
196 | get_tlb_tsize(const struct kvm_book3e_206_tlb_entry *tlbe) | |
197 | { | |
198 | return (tlbe->mas1 & MAS1_TSIZE_MASK) >> MAS1_TSIZE_SHIFT; | |
199 | } | |
200 | ||
bc8080cb HB |
201 | static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) |
202 | { | |
203 | return vcpu->arch.pid & 0xff; | |
204 | } | |
205 | ||
dd9ebf1f LY |
206 | static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) |
207 | { | |
208 | return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); | |
209 | } | |
210 | ||
211 | static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) | |
212 | { | |
213 | return !!(vcpu->arch.shared->msr & MSR_PR); | |
214 | } | |
215 | ||
b5904972 | 216 | static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) |
bc8080cb | 217 | { |
b5904972 | 218 | return (vcpu->arch.shared->mas6 >> 16) & 0xff; |
bc8080cb HB |
219 | } |
220 | ||
b5904972 | 221 | static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) |
bc8080cb | 222 | { |
b5904972 | 223 | return vcpu->arch.shared->mas6 & 0x1; |
bc8080cb HB |
224 | } |
225 | ||
b5904972 | 226 | static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) |
bc8080cb HB |
227 | { |
228 | /* | |
229 | * Manual says that tlbsel has 2 bits wide. | |
fb2838d4 | 230 | * Since we only have two TLBs, only lower bit is used. |
bc8080cb | 231 | */ |
b5904972 | 232 | return (vcpu->arch.shared->mas0 >> 28) & 0x1; |
bc8080cb HB |
233 | } |
234 | ||
b5904972 | 235 | static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 236 | { |
b5904972 | 237 | return vcpu->arch.shared->mas0 & 0xfff; |
bc8080cb HB |
238 | } |
239 | ||
b5904972 | 240 | static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 241 | { |
b5904972 | 242 | return (vcpu->arch.shared->mas0 >> 16) & 0xfff; |
bc8080cb HB |
243 | } |
244 | ||
bc8080cb | 245 | static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, |
dc83b8bc | 246 | const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
247 | { |
248 | gpa_t gpa; | |
249 | ||
250 | if (!get_tlb_v(tlbe)) | |
251 | return 0; | |
252 | ||
253 | /* Does it match current guest AS? */ | |
254 | /* XXX what about IS != DS? */ | |
666e7252 | 255 | if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) |
bc8080cb HB |
256 | return 0; |
257 | ||
258 | gpa = get_tlb_raddr(tlbe); | |
259 | if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) | |
260 | /* Mapping is not for RAM. */ | |
261 | return 0; | |
262 | ||
263 | return 1; | |
264 | } | |
265 | ||
8fdd21a2 SW |
266 | static inline struct kvm_book3e_206_tlb_entry *get_entry( |
267 | struct kvmppc_vcpu_e500 *vcpu_e500, int tlbsel, int entry) | |
268 | { | |
269 | int offset = vcpu_e500->gtlb_offset[tlbsel]; | |
270 | return &vcpu_e500->gtlb_arch[offset + entry]; | |
271 | } | |
272 | ||
273 | void kvmppc_e500_tlbil_one(struct kvmppc_vcpu_e500 *vcpu_e500, | |
274 | struct kvm_book3e_206_tlb_entry *gtlbe); | |
275 | void kvmppc_e500_tlbil_all(struct kvmppc_vcpu_e500 *vcpu_e500); | |
276 | ||
277 | #ifdef CONFIG_KVM_E500 | |
278 | unsigned int kvmppc_e500_get_tlb_stid(struct kvm_vcpu *vcpu, | |
279 | struct kvm_book3e_206_tlb_entry *gtlbe); | |
280 | ||
281 | static inline unsigned int get_tlbmiss_tid(struct kvm_vcpu *vcpu) | |
282 | { | |
283 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
284 | unsigned int tidseld = (vcpu->arch.shared->mas4 >> 16) & 0xf; | |
285 | ||
286 | return vcpu_e500->pid[tidseld]; | |
287 | } | |
288 | ||
289 | /* Force TS=1 for all guest mappings. */ | |
290 | #define get_tlb_sts(gtlbe) (MAS1_TS) | |
291 | #endif /* CONFIG_KVM_E500 */ | |
292 | ||
29a5a6f9 | 293 | #endif /* KVM_E500_H */ |