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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> |
bc8080cb HB |
5 | * |
6 | * Description: | |
fc6cf995 SW |
7 | * This file is based on arch/powerpc/kvm/44x_tlb.h and |
8 | * arch/powerpc/include/asm/kvm_44x.h by Hollis Blanchard <hollisb@us.ibm.com>, | |
9 | * Copyright IBM Corp. 2007-2008 | |
bc8080cb HB |
10 | * |
11 | * This program is free software; you can redistribute it and/or modify | |
12 | * it under the terms of the GNU General Public License, version 2, as | |
13 | * published by the Free Software Foundation. | |
14 | */ | |
15 | ||
29a5a6f9 SW |
16 | #ifndef KVM_E500_H |
17 | #define KVM_E500_H | |
bc8080cb HB |
18 | |
19 | #include <linux/kvm_host.h> | |
0cfb50e5 | 20 | #include <asm/mmu-book3e.h> |
bc8080cb | 21 | #include <asm/tlb.h> |
fc6cf995 SW |
22 | |
23 | #define E500_PID_NUM 3 | |
24 | #define E500_TLB_NUM 2 | |
25 | ||
26 | #define E500_TLB_VALID 1 | |
27 | #define E500_TLB_DIRTY 2 | |
28 | ||
29 | struct tlbe_ref { | |
30 | pfn_t pfn; | |
31 | unsigned int flags; /* E500_TLB_* */ | |
32 | }; | |
33 | ||
34 | struct tlbe_priv { | |
35 | struct tlbe_ref ref; /* TLB0 only -- TLB1 uses tlb_refs */ | |
36 | }; | |
37 | ||
38 | struct vcpu_id_table; | |
39 | ||
40 | struct kvmppc_e500_tlb_params { | |
41 | int entries, ways, sets; | |
42 | }; | |
43 | ||
44 | struct kvmppc_vcpu_e500 { | |
52e1718c SW |
45 | struct kvm_vcpu vcpu; |
46 | ||
fc6cf995 SW |
47 | /* Unmodified copy of the guest's TLB -- shared with host userspace. */ |
48 | struct kvm_book3e_206_tlb_entry *gtlb_arch; | |
49 | ||
50 | /* Starting entry number in gtlb_arch[] */ | |
51 | int gtlb_offset[E500_TLB_NUM]; | |
52 | ||
53 | /* KVM internal information associated with each guest TLB entry */ | |
54 | struct tlbe_priv *gtlb_priv[E500_TLB_NUM]; | |
55 | ||
56 | struct kvmppc_e500_tlb_params gtlb_params[E500_TLB_NUM]; | |
57 | ||
58 | unsigned int gtlb_nv[E500_TLB_NUM]; | |
59 | ||
60 | /* | |
61 | * information associated with each host TLB entry -- | |
62 | * TLB1 only for now. If/when guest TLB1 entries can be | |
63 | * mapped with host TLB0, this will be used for that too. | |
64 | * | |
65 | * We don't want to use this for guest TLB0 because then we'd | |
66 | * have the overhead of doing the translation again even if | |
67 | * the entry is still in the guest TLB (e.g. we swapped out | |
68 | * and back, and our host TLB entries got evicted). | |
69 | */ | |
70 | struct tlbe_ref *tlb_refs[E500_TLB_NUM]; | |
71 | unsigned int host_tlb1_nv; | |
72 | ||
73 | u32 host_pid[E500_PID_NUM]; | |
74 | u32 pid[E500_PID_NUM]; | |
75 | u32 svr; | |
76 | ||
77 | /* vcpu id table */ | |
78 | struct vcpu_id_table *idt; | |
79 | ||
80 | u32 l1csr0; | |
81 | u32 l1csr1; | |
82 | u32 hid0; | |
83 | u32 hid1; | |
84 | u32 tlb0cfg; | |
85 | u32 tlb1cfg; | |
86 | u64 mcar; | |
87 | ||
88 | struct page **shared_tlb_pages; | |
89 | int num_shared_tlb_pages; | |
fc6cf995 SW |
90 | }; |
91 | ||
92 | static inline struct kvmppc_vcpu_e500 *to_e500(struct kvm_vcpu *vcpu) | |
93 | { | |
94 | return container_of(vcpu, struct kvmppc_vcpu_e500, vcpu); | |
95 | } | |
bc8080cb | 96 | |
dc83b8bc SW |
97 | /* This geometry is the legacy default -- can be overridden by userspace */ |
98 | #define KVM_E500_TLB0_WAY_SIZE 128 | |
99 | #define KVM_E500_TLB0_WAY_NUM 2 | |
bc8080cb HB |
100 | |
101 | #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) | |
102 | #define KVM_E500_TLB1_SIZE 16 | |
103 | ||
104 | #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) | |
105 | #define tlbsel_of(index) ((index) >> 16) | |
106 | #define esel_of(index) ((index) & 0xFFFF) | |
107 | ||
108 | #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) | |
109 | #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) | |
110 | #define MAS2_ATTRIB_MASK \ | |
046a48b3 | 111 | (MAS2_X0 | MAS2_X1) |
bc8080cb HB |
112 | #define MAS3_ATTRIB_MASK \ |
113 | (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ | |
114 | | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) | |
115 | ||
bc8080cb HB |
116 | extern void kvmppc_e500_tlb_put(struct kvm_vcpu *); |
117 | extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int); | |
bc8080cb | 118 | extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *); |
dd9ebf1f | 119 | extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *); |
52e1718c SW |
120 | int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *vcpu_e500, |
121 | ulong value); | |
122 | int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *vcpu); | |
123 | int kvmppc_e500_emul_tlbre(struct kvm_vcpu *vcpu); | |
124 | int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *vcpu, int ra, int rb); | |
125 | int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *vcpu, int rb); | |
126 | int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int); | |
127 | int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *vcpu_e500); | |
128 | void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *vcpu_e500); | |
129 | ||
130 | void kvmppc_get_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); | |
131 | int kvmppc_set_sregs_e500_tlb(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs); | |
bc8080cb HB |
132 | |
133 | /* TLB helper functions */ | |
dc83b8bc SW |
134 | static inline unsigned int |
135 | get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb | 136 | { |
0cfb50e5 | 137 | return (tlbe->mas1 >> 7) & 0x1f; |
bc8080cb HB |
138 | } |
139 | ||
dc83b8bc | 140 | static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
141 | { |
142 | return tlbe->mas2 & 0xfffff000; | |
143 | } | |
144 | ||
dc83b8bc | 145 | static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
146 | { |
147 | unsigned int pgsize = get_tlb_size(tlbe); | |
0cfb50e5 | 148 | return 1ULL << 10 << pgsize; |
bc8080cb HB |
149 | } |
150 | ||
dc83b8bc | 151 | static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
152 | { |
153 | u64 bytes = get_tlb_bytes(tlbe); | |
154 | return get_tlb_eaddr(tlbe) + bytes - 1; | |
155 | } | |
156 | ||
dc83b8bc | 157 | static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb | 158 | { |
dc83b8bc | 159 | return tlbe->mas7_3 & ~0xfffULL; |
bc8080cb HB |
160 | } |
161 | ||
dc83b8bc SW |
162 | static inline unsigned int |
163 | get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
164 | { |
165 | return (tlbe->mas1 >> 16) & 0xff; | |
166 | } | |
167 | ||
dc83b8bc SW |
168 | static inline unsigned int |
169 | get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
170 | { |
171 | return (tlbe->mas1 >> 12) & 0x1; | |
172 | } | |
173 | ||
dc83b8bc SW |
174 | static inline unsigned int |
175 | get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
176 | { |
177 | return (tlbe->mas1 >> 31) & 0x1; | |
178 | } | |
179 | ||
dc83b8bc SW |
180 | static inline unsigned int |
181 | get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
182 | { |
183 | return (tlbe->mas1 >> 30) & 0x1; | |
184 | } | |
185 | ||
186 | static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) | |
187 | { | |
188 | return vcpu->arch.pid & 0xff; | |
189 | } | |
190 | ||
dd9ebf1f LY |
191 | static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) |
192 | { | |
193 | return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); | |
194 | } | |
195 | ||
196 | static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) | |
197 | { | |
198 | return !!(vcpu->arch.shared->msr & MSR_PR); | |
199 | } | |
200 | ||
b5904972 | 201 | static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) |
bc8080cb | 202 | { |
b5904972 | 203 | return (vcpu->arch.shared->mas6 >> 16) & 0xff; |
bc8080cb HB |
204 | } |
205 | ||
b5904972 | 206 | static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) |
bc8080cb | 207 | { |
b5904972 | 208 | return vcpu->arch.shared->mas6 & 0x1; |
bc8080cb HB |
209 | } |
210 | ||
b5904972 | 211 | static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) |
bc8080cb HB |
212 | { |
213 | /* | |
214 | * Manual says that tlbsel has 2 bits wide. | |
fb2838d4 | 215 | * Since we only have two TLBs, only lower bit is used. |
bc8080cb | 216 | */ |
b5904972 | 217 | return (vcpu->arch.shared->mas0 >> 28) & 0x1; |
bc8080cb HB |
218 | } |
219 | ||
b5904972 | 220 | static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 221 | { |
b5904972 | 222 | return vcpu->arch.shared->mas0 & 0xfff; |
bc8080cb HB |
223 | } |
224 | ||
b5904972 | 225 | static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 226 | { |
b5904972 | 227 | return (vcpu->arch.shared->mas0 >> 16) & 0xfff; |
bc8080cb HB |
228 | } |
229 | ||
bc8080cb | 230 | static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, |
dc83b8bc | 231 | const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
232 | { |
233 | gpa_t gpa; | |
234 | ||
235 | if (!get_tlb_v(tlbe)) | |
236 | return 0; | |
237 | ||
238 | /* Does it match current guest AS? */ | |
239 | /* XXX what about IS != DS? */ | |
666e7252 | 240 | if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) |
bc8080cb HB |
241 | return 0; |
242 | ||
243 | gpa = get_tlb_raddr(tlbe); | |
244 | if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) | |
245 | /* Mapping is not for RAM. */ | |
246 | return 0; | |
247 | ||
248 | return 1; | |
249 | } | |
250 | ||
29a5a6f9 | 251 | #endif /* KVM_E500_H */ |