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>
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
59 /* TLB helper functions */
get_tlb_size(const struct tlbe * tlbe)60 static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
61 {
62 return (tlbe->mas1 >> 7) & 0x1f;
63 }
64
get_tlb_eaddr(const struct tlbe * tlbe)65 static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
66 {
67 return tlbe->mas2 & 0xfffff000;
68 }
69
get_tlb_bytes(const struct tlbe * tlbe)70 static inline u64 get_tlb_bytes(const struct tlbe *tlbe)
71 {
72 unsigned int pgsize = get_tlb_size(tlbe);
73 return 1ULL << 10 << pgsize;
74 }
75
get_tlb_end(const struct tlbe * tlbe)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
get_tlb_raddr(const struct tlbe * tlbe)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
get_tlb_tid(const struct tlbe * tlbe)88 static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
89 {
90 return (tlbe->mas1 >> 16) & 0xff;
91 }
92
get_tlb_ts(const struct tlbe * tlbe)93 static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
94 {
95 return (tlbe->mas1 >> 12) & 0x1;
96 }
97
get_tlb_v(const struct tlbe * tlbe)98 static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
99 {
100 return (tlbe->mas1 >> 31) & 0x1;
101 }
102
get_tlb_iprot(const struct tlbe * tlbe)103 static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe)
104 {
105 return (tlbe->mas1 >> 30) & 0x1;
106 }
107
get_cur_pid(struct kvm_vcpu * vcpu)108 static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
109 {
110 return vcpu->arch.pid & 0xff;
111 }
112
get_cur_spid(const struct kvmppc_vcpu_e500 * vcpu_e500)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
get_cur_sas(const struct kvmppc_vcpu_e500 * vcpu_e500)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
get_tlb_tlbsel(const struct kvmppc_vcpu_e500 * vcpu_e500)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.
130 * Since we only have two TLBs, only lower bit is used.
131 */
132 return (vcpu_e500->mas0 >> 28) & 0x1;
133 }
134
get_tlb_nv_bit(const struct kvmppc_vcpu_e500 * vcpu_e500)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
get_tlb_esel_bit(const struct kvmppc_vcpu_e500 * vcpu_e500)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
get_tlb_esel(const struct kvmppc_vcpu_e500 * vcpu_e500,int tlbsel)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
tlbe_is_host_safe(const struct kvm_vcpu * vcpu,const struct tlbe * tlbe)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.shared->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__ */
186