e500_tlb.h
5.17 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
/*
* Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
*
* Author: Yu Liu, yu.liu@freescale.com
*
* Description:
* This file is based on arch/powerpc/kvm/44x_tlb.h,
* by Hollis Blanchard <hollisb@us.ibm.com>.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License, version 2, as
* published by the Free Software Foundation.
*/
#ifndef __KVM_E500_TLB_H__
#define __KVM_E500_TLB_H__
#include <linux/kvm_host.h>
#include <asm/mmu-book3e.h>
#include <asm/tlb.h>
#include <asm/kvm_e500.h>
#define KVM_E500_TLB0_WAY_SIZE_BIT 7 /* Fixed */
#define KVM_E500_TLB0_WAY_SIZE (1UL << KVM_E500_TLB0_WAY_SIZE_BIT)
#define KVM_E500_TLB0_WAY_SIZE_MASK (KVM_E500_TLB0_WAY_SIZE - 1)
#define KVM_E500_TLB0_WAY_NUM_BIT 1 /* No greater than 7 */
#define KVM_E500_TLB0_WAY_NUM (1UL << KVM_E500_TLB0_WAY_NUM_BIT)
#define KVM_E500_TLB0_WAY_NUM_MASK (KVM_E500_TLB0_WAY_NUM - 1)
#define KVM_E500_TLB0_SIZE (KVM_E500_TLB0_WAY_SIZE * KVM_E500_TLB0_WAY_NUM)
#define KVM_E500_TLB1_SIZE 16
#define index_of(tlbsel, esel) (((tlbsel) << 16) | ((esel) & 0xFFFF))
#define tlbsel_of(index) ((index) >> 16)
#define esel_of(index) ((index) & 0xFFFF)
#define E500_TLB_USER_PERM_MASK (MAS3_UX|MAS3_UR|MAS3_UW)
#define E500_TLB_SUPER_PERM_MASK (MAS3_SX|MAS3_SR|MAS3_SW)
#define MAS2_ATTRIB_MASK \
(MAS2_X0 | MAS2_X1)
#define MAS3_ATTRIB_MASK \
(MAS3_U0 | MAS3_U1 | MAS3_U2 | MAS3_U3 \
| E500_TLB_USER_PERM_MASK | E500_TLB_SUPER_PERM_MASK)
extern void kvmppc_dump_tlbs(struct kvm_vcpu *);
extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong);
extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *);
extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *);
extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int);
extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int);
extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int);
extern void kvmppc_e500_tlb_put(struct kvm_vcpu *);
extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int);
extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *);
extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *);
extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
/* TLB helper functions */
static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
{
return (tlbe->mas1 >> 7) & 0x1f;
}
static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
{
return tlbe->mas2 & 0xfffff000;
}
static inline u64 get_tlb_bytes(const struct tlbe *tlbe)
{
unsigned int pgsize = get_tlb_size(tlbe);
return 1ULL << 10 << pgsize;
}
static inline gva_t get_tlb_end(const struct tlbe *tlbe)
{
u64 bytes = get_tlb_bytes(tlbe);
return get_tlb_eaddr(tlbe) + bytes - 1;
}
static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
{
u64 rpn = tlbe->mas7;
return (rpn << 32) | (tlbe->mas3 & 0xfffff000);
}
static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
{
return (tlbe->mas1 >> 16) & 0xff;
}
static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
{
return (tlbe->mas1 >> 12) & 0x1;
}
static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
{
return (tlbe->mas1 >> 31) & 0x1;
}
static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe)
{
return (tlbe->mas1 >> 30) & 0x1;
}
static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
{
return vcpu->arch.pid & 0xff;
}
static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
{
return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
}
static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
{
return !!(vcpu->arch.shared->msr & MSR_PR);
}
static inline unsigned int get_cur_spid(
const struct kvmppc_vcpu_e500 *vcpu_e500)
{
return (vcpu_e500->mas6 >> 16) & 0xff;
}
static inline unsigned int get_cur_sas(
const struct kvmppc_vcpu_e500 *vcpu_e500)
{
return vcpu_e500->mas6 & 0x1;
}
static inline unsigned int get_tlb_tlbsel(
const struct kvmppc_vcpu_e500 *vcpu_e500)
{
/*
* Manual says that tlbsel has 2 bits wide.
* Since we only have two TLBs, only lower bit is used.
*/
return (vcpu_e500->mas0 >> 28) & 0x1;
}
static inline unsigned int get_tlb_nv_bit(
const struct kvmppc_vcpu_e500 *vcpu_e500)
{
return vcpu_e500->mas0 & 0xfff;
}
static inline unsigned int get_tlb_esel_bit(
const struct kvmppc_vcpu_e500 *vcpu_e500)
{
return (vcpu_e500->mas0 >> 16) & 0xfff;
}
static inline unsigned int get_tlb_esel(
const struct kvmppc_vcpu_e500 *vcpu_e500,
int tlbsel)
{
unsigned int esel = get_tlb_esel_bit(vcpu_e500);
if (tlbsel == 0) {
esel &= KVM_E500_TLB0_WAY_NUM_MASK;
esel |= ((vcpu_e500->mas2 >> 12) & KVM_E500_TLB0_WAY_SIZE_MASK)
<< KVM_E500_TLB0_WAY_NUM_BIT;
} else {
esel &= KVM_E500_TLB1_SIZE - 1;
}
return esel;
}
static inline int tlbe_is_host_safe(const struct kvm_vcpu *vcpu,
const struct tlbe *tlbe)
{
gpa_t gpa;
if (!get_tlb_v(tlbe))
return 0;
/* Does it match current guest AS? */
/* XXX what about IS != DS? */
if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
return 0;
gpa = get_tlb_raddr(tlbe);
if (!gfn_to_memslot(vcpu->kvm, gpa >> PAGE_SHIFT))
/* Mapping is not for RAM. */
return 0;
return 1;
}
#endif /* __KVM_E500_TLB_H__ */