1 /*
2 * Copyright (C) 2008-2011 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>
19 #include <asm/mmu-book3e.h>
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 \
41 (MAS2_X0 | MAS2_X1)
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 *);
47 extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong);
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 extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
59
60 /* TLB helper functions */
get_tlb_size(const struct tlbe * tlbe)61 static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
62 {
63 return (tlbe->mas1 >> 7) & 0x1f;
64 }
65
get_tlb_eaddr(const struct tlbe * tlbe)66 static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
67 {
68 return tlbe->mas2 & 0xfffff000;
69 }
70
get_tlb_bytes(const struct tlbe * tlbe)71 static inline u64 get_tlb_bytes(const struct tlbe *tlbe)
72 {
73 unsigned int pgsize = get_tlb_size(tlbe);
74 return 1ULL << 10 << pgsize;
75 }
76
get_tlb_end(const struct tlbe * tlbe)77 static inline gva_t get_tlb_end(const struct tlbe *tlbe)
78 {
79 u64 bytes = get_tlb_bytes(tlbe);
80 return get_tlb_eaddr(tlbe) + bytes - 1;
81 }
82
get_tlb_raddr(const struct tlbe * tlbe)83 static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
84 {
85 u64 rpn = tlbe->mas7;
86 return (rpn << 32) | (tlbe->mas3 & 0xfffff000);
87 }
88
get_tlb_tid(const struct tlbe * tlbe)89 static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
90 {
91 return (tlbe->mas1 >> 16) & 0xff;
92 }
93
get_tlb_ts(const struct tlbe * tlbe)94 static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
95 {
96 return (tlbe->mas1 >> 12) & 0x1;
97 }
98
get_tlb_v(const struct tlbe * tlbe)99 static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
100 {
101 return (tlbe->mas1 >> 31) & 0x1;
102 }
103
get_tlb_iprot(const struct tlbe * tlbe)104 static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe)
105 {
106 return (tlbe->mas1 >> 30) & 0x1;
107 }
108
get_cur_pid(struct kvm_vcpu * vcpu)109 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
110 {
111 return vcpu->arch.pid & 0xff;
112 }
113
get_cur_as(struct kvm_vcpu * vcpu)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
get_cur_pr(struct kvm_vcpu * vcpu)119 static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
120 {
121 return !!(vcpu->arch.shared->msr & MSR_PR);
122 }
123
get_cur_spid(const struct kvmppc_vcpu_e500 * vcpu_e500)124 static inline unsigned int get_cur_spid(
125 const struct kvmppc_vcpu_e500 *vcpu_e500)
126 {
127 return (vcpu_e500->mas6 >> 16) & 0xff;
128 }
129
get_cur_sas(const struct kvmppc_vcpu_e500 * vcpu_e500)130 static inline unsigned int get_cur_sas(
131 const struct kvmppc_vcpu_e500 *vcpu_e500)
132 {
133 return vcpu_e500->mas6 & 0x1;
134 }
135
get_tlb_tlbsel(const struct kvmppc_vcpu_e500 * vcpu_e500)136 static inline unsigned int get_tlb_tlbsel(
137 const struct kvmppc_vcpu_e500 *vcpu_e500)
138 {
139 /*
140 * Manual says that tlbsel has 2 bits wide.
141 * Since we only have two TLBs, only lower bit is used.
142 */
143 return (vcpu_e500->mas0 >> 28) & 0x1;
144 }
145
get_tlb_nv_bit(const struct kvmppc_vcpu_e500 * vcpu_e500)146 static inline unsigned int get_tlb_nv_bit(
147 const struct kvmppc_vcpu_e500 *vcpu_e500)
148 {
149 return vcpu_e500->mas0 & 0xfff;
150 }
151
get_tlb_esel_bit(const struct kvmppc_vcpu_e500 * vcpu_e500)152 static inline unsigned int get_tlb_esel_bit(
153 const struct kvmppc_vcpu_e500 *vcpu_e500)
154 {
155 return (vcpu_e500->mas0 >> 16) & 0xfff;
156 }
157
get_tlb_esel(const struct kvmppc_vcpu_e500 * vcpu_e500,int tlbsel)158 static inline unsigned int get_tlb_esel(
159 const struct kvmppc_vcpu_e500 *vcpu_e500,
160 int tlbsel)
161 {
162 unsigned int esel = get_tlb_esel_bit(vcpu_e500);
163
164 if (tlbsel == 0) {
165 esel &= KVM_E500_TLB0_WAY_NUM_MASK;
166 esel |= ((vcpu_e500->mas2 >> 12) & KVM_E500_TLB0_WAY_SIZE_MASK)
167 << KVM_E500_TLB0_WAY_NUM_BIT;
168 } else {
169 esel &= KVM_E500_TLB1_SIZE - 1;
170 }
171
172 return esel;
173 }
174
tlbe_is_host_safe(const struct kvm_vcpu * vcpu,const struct tlbe * tlbe)175 static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
176 const struct tlbe *tlbe)
177 {
178 gpa_t gpa;
179
180 if (!get_tlb_v(tlbe))
181 return 0;
182
183 /* Does it match current guest AS? */
184 /* XXX what about IS != DS? */
185 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
186 return 0;
187
188 gpa = get_tlb_raddr(tlbe);
189 if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
190 /* Mapping is not for RAM. */
191 return 0;
192
193 return 1;
194 }
195
196 #endif /* __KVM_E500_TLB_H__ */
197