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bc8080cb | 1 | /* |
dd9ebf1f | 2 | * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved. |
bc8080cb HB |
3 | * |
4 | * Author: Yu Liu, yu.liu@freescale.com | |
5 | * | |
6 | * Description: | |
7 | * This file is based on arch/powerpc/kvm/44x_tlb.h, | |
8 | * by Hollis Blanchard <hollisb@us.ibm.com>. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License, version 2, as | |
12 | * published by the Free Software Foundation. | |
13 | */ | |
14 | ||
29a5a6f9 SW |
15 | #ifndef KVM_E500_H |
16 | #define KVM_E500_H | |
bc8080cb HB |
17 | |
18 | #include <linux/kvm_host.h> | |
0cfb50e5 | 19 | #include <asm/mmu-book3e.h> |
bc8080cb HB |
20 | #include <asm/tlb.h> |
21 | #include <asm/kvm_e500.h> | |
22 | ||
dc83b8bc SW |
23 | /* This geometry is the legacy default -- can be overridden by userspace */ |
24 | #define KVM_E500_TLB0_WAY_SIZE 128 | |
25 | #define KVM_E500_TLB0_WAY_NUM 2 | |
bc8080cb HB |
26 | |
27 | #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) | |
28 | #define KVM_E500_TLB1_SIZE 16 | |
29 | ||
30 | #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) | |
31 | #define tlbsel_of(index) ((index) >> 16) | |
32 | #define esel_of(index) ((index) & 0xFFFF) | |
33 | ||
34 | #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) | |
35 | #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) | |
36 | #define MAS2_ATTRIB_MASK \ | |
046a48b3 | 37 | (MAS2_X0 | MAS2_X1) |
bc8080cb HB |
38 | #define MAS3_ATTRIB_MASK \ |
39 | (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ | |
40 | | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) | |
41 | ||
42 | extern void kvmppc_dump_tlbs(struct kvm_vcpu *); | |
b0a1835d | 43 | extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong); |
bc8080cb HB |
44 | extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *); |
45 | extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *); | |
46 | extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int); | |
47 | extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int); | |
48 | extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int); | |
49 | extern void kvmppc_e500_tlb_put(struct kvm_vcpu *); | |
50 | extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int); | |
51 | extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *); | |
52 | extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *); | |
53 | extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *); | |
dd9ebf1f | 54 | extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *); |
bc8080cb HB |
55 | |
56 | /* TLB helper functions */ | |
dc83b8bc SW |
57 | static inline unsigned int |
58 | get_tlb_size(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb | 59 | { |
0cfb50e5 | 60 | return (tlbe->mas1 >> 7) & 0x1f; |
bc8080cb HB |
61 | } |
62 | ||
dc83b8bc | 63 | static inline gva_t get_tlb_eaddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
64 | { |
65 | return tlbe->mas2 & 0xfffff000; | |
66 | } | |
67 | ||
dc83b8bc | 68 | static inline u64 get_tlb_bytes(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
69 | { |
70 | unsigned int pgsize = get_tlb_size(tlbe); | |
0cfb50e5 | 71 | return 1ULL << 10 << pgsize; |
bc8080cb HB |
72 | } |
73 | ||
dc83b8bc | 74 | static inline gva_t get_tlb_end(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
75 | { |
76 | u64 bytes = get_tlb_bytes(tlbe); | |
77 | return get_tlb_eaddr(tlbe) + bytes - 1; | |
78 | } | |
79 | ||
dc83b8bc | 80 | static inline u64 get_tlb_raddr(const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb | 81 | { |
dc83b8bc | 82 | return tlbe->mas7_3 & ~0xfffULL; |
bc8080cb HB |
83 | } |
84 | ||
dc83b8bc SW |
85 | static inline unsigned int |
86 | get_tlb_tid(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
87 | { |
88 | return (tlbe->mas1 >> 16) & 0xff; | |
89 | } | |
90 | ||
dc83b8bc SW |
91 | static inline unsigned int |
92 | get_tlb_ts(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
93 | { |
94 | return (tlbe->mas1 >> 12) & 0x1; | |
95 | } | |
96 | ||
dc83b8bc SW |
97 | static inline unsigned int |
98 | get_tlb_v(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
99 | { |
100 | return (tlbe->mas1 >> 31) & 0x1; | |
101 | } | |
102 | ||
dc83b8bc SW |
103 | static inline unsigned int |
104 | get_tlb_iprot(const struct kvm_book3e_206_tlb_entry *tlbe) | |
bc8080cb HB |
105 | { |
106 | return (tlbe->mas1 >> 30) & 0x1; | |
107 | } | |
108 | ||
109 | static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) | |
110 | { | |
111 | return vcpu->arch.pid & 0xff; | |
112 | } | |
113 | ||
dd9ebf1f LY |
114 | static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu) |
115 | { | |
116 | return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS)); | |
117 | } | |
118 | ||
119 | static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu) | |
120 | { | |
121 | return !!(vcpu->arch.shared->msr & MSR_PR); | |
122 | } | |
123 | ||
b5904972 | 124 | static inline unsigned int get_cur_spid(const struct kvm_vcpu *vcpu) |
bc8080cb | 125 | { |
b5904972 | 126 | return (vcpu->arch.shared->mas6 >> 16) & 0xff; |
bc8080cb HB |
127 | } |
128 | ||
b5904972 | 129 | static inline unsigned int get_cur_sas(const struct kvm_vcpu *vcpu) |
bc8080cb | 130 | { |
b5904972 | 131 | return vcpu->arch.shared->mas6 & 0x1; |
bc8080cb HB |
132 | } |
133 | ||
b5904972 | 134 | static inline unsigned int get_tlb_tlbsel(const struct kvm_vcpu *vcpu) |
bc8080cb HB |
135 | { |
136 | /* | |
137 | * Manual says that tlbsel has 2 bits wide. | |
fb2838d4 | 138 | * Since we only have two TLBs, only lower bit is used. |
bc8080cb | 139 | */ |
b5904972 | 140 | return (vcpu->arch.shared->mas0 >> 28) & 0x1; |
bc8080cb HB |
141 | } |
142 | ||
b5904972 | 143 | static inline unsigned int get_tlb_nv_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 144 | { |
b5904972 | 145 | return vcpu->arch.shared->mas0 & 0xfff; |
bc8080cb HB |
146 | } |
147 | ||
b5904972 | 148 | static inline unsigned int get_tlb_esel_bit(const struct kvm_vcpu *vcpu) |
bc8080cb | 149 | { |
b5904972 | 150 | return (vcpu->arch.shared->mas0 >> 16) & 0xfff; |
bc8080cb HB |
151 | } |
152 | ||
bc8080cb | 153 | static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, |
dc83b8bc | 154 | const struct kvm_book3e_206_tlb_entry *tlbe) |
bc8080cb HB |
155 | { |
156 | gpa_t gpa; | |
157 | ||
158 | if (!get_tlb_v(tlbe)) | |
159 | return 0; | |
160 | ||
161 | /* Does it match current guest AS? */ | |
162 | /* XXX what about IS != DS? */ | |
666e7252 | 163 | if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS)) |
bc8080cb HB |
164 | return 0; |
165 | ||
166 | gpa = get_tlb_raddr(tlbe); | |
167 | if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) | |
168 | /* Mapping is not for RAM. */ | |
169 | return 0; | |
170 | ||
171 | return 1; | |
172 | } | |
173 | ||
29a5a6f9 | 174 | #endif /* KVM_E500_H */ |