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Hollis Blanchardbc8080c2009-01-03 16:23:10 -06001/*
Liu Yudd9ebf1f2011-06-14 18:35:14 -05002 * Copyright (C) 2008-2011 Freescale Semiconductor, Inc. All rights reserved.
Hollis Blanchardbc8080c2009-01-03 16:23:10 -06003 *
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>
Liu Yu0cfb50e2009-06-05 14:54:29 +080019#include <asm/mmu-book3e.h>
Hollis Blanchardbc8080c2009-01-03 16:23:10 -060020#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 \
Liu Yu046a48b2009-03-17 16:57:46 +080041 (MAS2_X0 | MAS2_X1)
Hollis Blanchardbc8080c2009-01-03 16:23:10 -060042#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
46extern void kvmppc_dump_tlbs(struct kvm_vcpu *);
Liu Yub0a18352009-02-17 16:52:08 +080047extern int kvmppc_e500_emul_mt_mmucsr0(struct kvmppc_vcpu_e500 *, ulong);
Hollis Blanchardbc8080c2009-01-03 16:23:10 -060048extern int kvmppc_e500_emul_tlbwe(struct kvm_vcpu *);
49extern int kvmppc_e500_emul_tlbre(struct kvm_vcpu *);
50extern int kvmppc_e500_emul_tlbivax(struct kvm_vcpu *, int, int);
51extern int kvmppc_e500_emul_tlbsx(struct kvm_vcpu *, int);
52extern int kvmppc_e500_tlb_search(struct kvm_vcpu *, gva_t, unsigned int, int);
53extern void kvmppc_e500_tlb_put(struct kvm_vcpu *);
54extern void kvmppc_e500_tlb_load(struct kvm_vcpu *, int);
55extern int kvmppc_e500_tlb_init(struct kvmppc_vcpu_e500 *);
56extern void kvmppc_e500_tlb_uninit(struct kvmppc_vcpu_e500 *);
57extern void kvmppc_e500_tlb_setup(struct kvmppc_vcpu_e500 *);
Liu Yudd9ebf1f2011-06-14 18:35:14 -050058extern void kvmppc_e500_recalc_shadow_pid(struct kvmppc_vcpu_e500 *);
Hollis Blanchardbc8080c2009-01-03 16:23:10 -060059
60/* TLB helper functions */
61static inline unsigned int get_tlb_size(const struct tlbe *tlbe)
62{
Liu Yu0cfb50e2009-06-05 14:54:29 +080063 return (tlbe->mas1 >> 7) & 0x1f;
Hollis Blanchardbc8080c2009-01-03 16:23:10 -060064}
65
66static inline gva_t get_tlb_eaddr(const struct tlbe *tlbe)
67{
68 return tlbe->mas2 & 0xfffff000;
69}
70
71static inline u64 get_tlb_bytes(const struct tlbe *tlbe)
72{
73 unsigned int pgsize = get_tlb_size(tlbe);
Liu Yu0cfb50e2009-06-05 14:54:29 +080074 return 1ULL << 10 << pgsize;
Hollis Blanchardbc8080c2009-01-03 16:23:10 -060075}
76
77static 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
83static inline u64 get_tlb_raddr(const struct tlbe *tlbe)
84{
85 u64 rpn = tlbe->mas7;
86 return (rpn << 32) | (tlbe->mas3 & 0xfffff000);
87}
88
89static inline unsigned int get_tlb_tid(const struct tlbe *tlbe)
90{
91 return (tlbe->mas1 >> 16) & 0xff;
92}
93
94static inline unsigned int get_tlb_ts(const struct tlbe *tlbe)
95{
96 return (tlbe->mas1 >> 12) & 0x1;
97}
98
99static inline unsigned int get_tlb_v(const struct tlbe *tlbe)
100{
101 return (tlbe->mas1 >> 31) & 0x1;
102}
103
104static inline unsigned int get_tlb_iprot(const struct tlbe *tlbe)
105{
106 return (tlbe->mas1 >> 30) & 0x1;
107}
108
109static inline unsigned int get_cur_pid(struct kvm_vcpu *vcpu)
110{
111 return vcpu->arch.pid & 0xff;
112}
113
Liu Yudd9ebf1f2011-06-14 18:35:14 -0500114static inline unsigned int get_cur_as(struct kvm_vcpu *vcpu)
115{
116 return !!(vcpu->arch.shared->msr & (MSR_IS | MSR_DS));
117}
118
119static inline unsigned int get_cur_pr(struct kvm_vcpu *vcpu)
120{
121 return !!(vcpu->arch.shared->msr & MSR_PR);
122}
123
Hollis Blanchardbc8080c2009-01-03 16:23:10 -0600124static inline unsigned int get_cur_spid(
125 const struct kvmppc_vcpu_e500 *vcpu_e500)
126{
127 return (vcpu_e500->mas6 >> 16) & 0xff;
128}
129
130static inline unsigned int get_cur_sas(
131 const struct kvmppc_vcpu_e500 *vcpu_e500)
132{
133 return vcpu_e500->mas6 & 0x1;
134}
135
136static 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.
Liu Yufb2838d2009-01-14 10:47:37 -0600141 * Since we only have two TLBs, only lower bit is used.
Hollis Blanchardbc8080c2009-01-03 16:23:10 -0600142 */
143 return (vcpu_e500->mas0 >> 28) & 0x1;
144}
145
146static inline unsigned int get_tlb_nv_bit(
147 const struct kvmppc_vcpu_e500 *vcpu_e500)
148{
149 return vcpu_e500->mas0 & 0xfff;
150}
151
152static 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
158static 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
175static 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? */
Alexander Graf666e7252010-07-29 14:47:43 +0200185 if (get_tlb_ts(tlbe) != !!(vcpu->arch.shared->msr & MSR_IS))
Hollis Blanchardbc8080c2009-01-03 16:23:10 -0600186 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__ */