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bc8080cb HB |
1 | /* |
2 | * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved. | |
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 | ||
15 | #ifndef __KVM_E500_TLB_H__ | |
16 | #define __KVM_E500_TLB_H__ | |
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 | ||
23 | #define KVM_E500_TLB0_WAY_SIZE_BIT 7 /* Fixed */ | |
24 | #define KVM_E500_TLB0_WAY_SIZE (1UL << KVM_E500_TLB0_WAY_SIZE_BIT) | |
25 | #define KVM_E500_TLB0_WAY_SIZE_MASK (KVM_E500_TLB0_WAY_SIZE - 1) | |
26 | ||
27 | #define KVM_E500_TLB0_WAY_NUM_BIT 1 /* No greater than 7 */ | |
28 | #define KVM_E500_TLB0_WAY_NUM (1UL << KVM_E500_TLB0_WAY_NUM_BIT) | |
29 | #define KVM_E500_TLB0_WAY_NUM_MASK (KVM_E500_TLB0_WAY_NUM - 1) | |
30 | ||
31 | #define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM) | |
32 | #define KVM_E500_TLB1_SIZE 16 | |
33 | ||
34 | #define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF)) | |
35 | #define tlbsel_of(index) ((index) >> 16) | |
36 | #define esel_of(index) ((index) & 0xFFFF) | |
37 | ||
38 | #define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW) | |
39 | #define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW) | |
40 | #define MAS2_ATTRIB_MASK \ | |
046a48b3 | 41 | (MAS2_X0 | MAS2_X1) |
bc8080cb HB |
42 | #define MAS3_ATTRIB_MASK \ |
43 | (MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \ | |
44 | | E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK) | |
45 | ||
46 | extern void kvmppc_dump_tlbs(struct kvm_vcpu *); | |
b0a1835d | 47 | extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong); |
bc8080cb HB |
48 | extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *); |
49 | extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *); | |
50 | extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int); | |
51 | extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int); | |
52 | extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int); | |
53 | extern void kvmppc_e500_tlb_put(struct kvm_vcpu *); | |
54 | extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int); | |
55 | extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *); | |
56 | extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *); | |
57 | extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *); | |
58 | ||
59 | /* TLB helper functions */ | |
60 | static inline unsigned int get_tlb_size(const struct tlbe *tlbe) | |
61 | { | |
0cfb50e5 | 62 | return (tlbe->mas1 >> 7) & 0x1f; |
bc8080cb HB |
63 | } |
64 | ||
65 | static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe) | |
66 | { | |
67 | return tlbe->mas2 & 0xfffff000; | |
68 | } | |
69 | ||
70 | static inline u64 get_tlb_bytes(const struct tlbe *tlbe) | |
71 | { | |
72 | unsigned int pgsize = get_tlb_size(tlbe); | |
0cfb50e5 | 73 | return 1ULL << 10 << pgsize; |
bc8080cb HB |
74 | } |
75 | ||
76 | static inline gva_t get_tlb_end(const struct tlbe *tlbe) | |
77 | { | |
78 | u64 bytes = get_tlb_bytes(tlbe); | |
79 | return get_tlb_eaddr(tlbe) + bytes - 1; | |
80 | } | |
81 | ||
82 | static inline u64 get_tlb_raddr(const struct tlbe *tlbe) | |
83 | { | |
84 | u64 rpn = tlbe->mas7; | |
85 | return (rpn << 32) | (tlbe->mas3 & 0xfffff000); | |
86 | } | |
87 | ||
88 | static inline unsigned int get_tlb_tid(const struct tlbe *tlbe) | |
89 | { | |
90 | return (tlbe->mas1 >> 16) & 0xff; | |
91 | } | |
92 | ||
93 | static inline unsigned int get_tlb_ts(const struct tlbe *tlbe) | |
94 | { | |
95 | return (tlbe->mas1 >> 12) & 0x1; | |
96 | } | |
97 | ||
98 | static inline unsigned int get_tlb_v(const struct tlbe *tlbe) | |
99 | { | |
100 | return (tlbe->mas1 >> 31) & 0x1; | |
101 | } | |
102 | ||
103 | static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe) | |
104 | { | |
105 | return (tlbe->mas1 >> 30) & 0x1; | |
106 | } | |
107 | ||
108 | static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu) | |
109 | { | |
110 | return vcpu->arch.pid & 0xff; | |
111 | } | |
112 | ||
113 | static inline unsigned int get_cur_spid( | |
114 | const struct kvmppc_vcpu_e500 *vcpu_e500) | |
115 | { | |
116 | return (vcpu_e500->mas6 >> 16) & 0xff; | |
117 | } | |
118 | ||
119 | static inline unsigned int get_cur_sas( | |
120 | const struct kvmppc_vcpu_e500 *vcpu_e500) | |
121 | { | |
122 | return vcpu_e500->mas6 & 0x1; | |
123 | } | |
124 | ||
125 | static inline unsigned int get_tlb_tlbsel( | |
126 | const struct kvmppc_vcpu_e500 *vcpu_e500) | |
127 | { | |
128 | /* | |
129 | * Manual says that tlbsel has 2 bits wide. | |
fb2838d4 | 130 | * Since we only have two TLBs, only lower bit is used. |
bc8080cb HB |
131 | */ |
132 | return (vcpu_e500->mas0 >> 28) & 0x1; | |
133 | } | |
134 | ||
135 | static inline unsigned int get_tlb_nv_bit( | |
136 | const struct kvmppc_vcpu_e500 *vcpu_e500) | |
137 | { | |
138 | return vcpu_e500->mas0 & 0xfff; | |
139 | } | |
140 | ||
141 | static inline unsigned int get_tlb_esel_bit( | |
142 | const struct kvmppc_vcpu_e500 *vcpu_e500) | |
143 | { | |
144 | return (vcpu_e500->mas0 >> 16) & 0xfff; | |
145 | } | |
146 | ||
147 | static inline unsigned int get_tlb_esel( | |
148 | const struct kvmppc_vcpu_e500 *vcpu_e500, | |
149 | int tlbsel) | |
150 | { | |
151 | unsigned int esel = get_tlb_esel_bit(vcpu_e500); | |
152 | ||
153 | if (tlbsel == 0) { | |
154 | esel &= KVM_E500_TLB0_WAY_NUM_MASK; | |
155 | esel |= ((vcpu_e500->mas2 >> 12) & KVM_E500_TLB0_WAY_SIZE_MASK) | |
156 | << KVM_E500_TLB0_WAY_NUM_BIT; | |
157 | } else { | |
158 | esel &= KVM_E500_TLB1_SIZE - 1; | |
159 | } | |
160 | ||
161 | return esel; | |
162 | } | |
163 | ||
164 | static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu, | |
165 | const struct tlbe *tlbe) | |
166 | { | |
167 | gpa_t gpa; | |
168 | ||
169 | if (!get_tlb_v(tlbe)) | |
170 | return 0; | |
171 | ||
172 | /* Does it match current guest AS? */ | |
173 | /* XXX what about IS != DS? */ | |
174 | if (get_tlb_ts(tlbe) != !!(vcpu->arch.msr & MSR_IS)) | |
175 | return 0; | |
176 | ||
177 | gpa = get_tlb_raddr(tlbe); | |
178 | if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT)) | |
179 | /* Mapping is not for RAM. */ | |
180 | return 0; | |
181 | ||
182 | return 1; | |
183 | } | |
184 | ||
185 | #endif /* __KVM_E500_TLB_H__ */ |