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9dd921cf HB |
1 | /* |
2 | * This program is free software; you can redistribute it and/or modify | |
3 | * it under the terms of the GNU General Public License, version 2, as | |
4 | * published by the Free Software Foundation. | |
5 | * | |
6 | * This program is distributed in the hope that it will be useful, | |
7 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
8 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
9 | * GNU General Public License for more details. | |
10 | * | |
11 | * You should have received a copy of the GNU General Public License | |
12 | * along with this program; if not, write to the Free Software | |
13 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
14 | * | |
15 | * Copyright IBM Corp. 2008 | |
16 | * | |
17 | * Authors: Hollis Blanchard <hollisb@us.ibm.com> | |
18 | */ | |
19 | ||
20 | #include <linux/kvm_host.h> | |
5a0e3ad6 | 21 | #include <linux/slab.h> |
db93f574 HB |
22 | #include <linux/err.h> |
23 | ||
9dd921cf HB |
24 | #include <asm/reg.h> |
25 | #include <asm/cputable.h> | |
26 | #include <asm/tlbflush.h> | |
db93f574 HB |
27 | #include <asm/kvm_44x.h> |
28 | #include <asm/kvm_ppc.h> | |
9dd921cf HB |
29 | |
30 | #include "44x_tlb.h" | |
31 | ||
9dd921cf HB |
32 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
33 | { | |
c5fbdffb | 34 | kvmppc_44x_tlb_load(vcpu); |
9dd921cf HB |
35 | } |
36 | ||
37 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) | |
38 | { | |
c5fbdffb | 39 | kvmppc_44x_tlb_put(vcpu); |
9dd921cf HB |
40 | } |
41 | ||
42 | int kvmppc_core_check_processor_compat(void) | |
43 | { | |
44 | int r; | |
45 | ||
46 | if (strcmp(cur_cpu_spec->platform, "ppc440") == 0) | |
47 | r = 0; | |
48 | else | |
49 | r = -ENOTSUPP; | |
50 | ||
51 | return r; | |
52 | } | |
5cbb5106 HB |
53 | |
54 | int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) | |
55 | { | |
db93f574 HB |
56 | struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu); |
57 | struct kvmppc_44x_tlbe *tlbe = &vcpu_44x->guest_tlb[0]; | |
7924bd41 | 58 | int i; |
5cbb5106 HB |
59 | |
60 | tlbe->tid = 0; | |
61 | tlbe->word0 = PPC44x_TLB_16M | PPC44x_TLB_VALID; | |
62 | tlbe->word1 = 0; | |
63 | tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR; | |
64 | ||
65 | tlbe++; | |
66 | tlbe->tid = 0; | |
67 | tlbe->word0 = 0xef600000 | PPC44x_TLB_4K | PPC44x_TLB_VALID; | |
68 | tlbe->word1 = 0xef600000; | |
69 | tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR | |
70 | | PPC44x_TLB_I | PPC44x_TLB_G; | |
71 | ||
72 | /* Since the guest can directly access the timebase, it must know the | |
73 | * real timebase frequency. Accordingly, it must see the state of | |
74 | * CCR1[TCS]. */ | |
75 | vcpu->arch.ccr1 = mfspr(SPRN_CCR1); | |
76 | ||
7924bd41 HB |
77 | for (i = 0; i < ARRAY_SIZE(vcpu_44x->shadow_refs); i++) |
78 | vcpu_44x->shadow_refs[i].gtlb_index = -1; | |
79 | ||
5cbb5106 HB |
80 | return 0; |
81 | } | |
82 | ||
83 | /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ | |
84 | int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, | |
85 | struct kvm_translation *tr) | |
86 | { | |
5cbb5106 HB |
87 | int index; |
88 | gva_t eaddr; | |
89 | u8 pid; | |
90 | u8 as; | |
91 | ||
92 | eaddr = tr->linear_address; | |
93 | pid = (tr->linear_address >> 32) & 0xff; | |
94 | as = (tr->linear_address >> 40) & 0x1; | |
95 | ||
96 | index = kvmppc_44x_tlb_index(vcpu, eaddr, pid, as); | |
97 | if (index == -1) { | |
98 | tr->valid = 0; | |
99 | return 0; | |
100 | } | |
101 | ||
be8d1cae | 102 | tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); |
5cbb5106 HB |
103 | /* XXX what does "writeable" and "usermode" even mean? */ |
104 | tr->valid = 1; | |
105 | ||
106 | return 0; | |
107 | } | |
db93f574 HB |
108 | |
109 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) | |
110 | { | |
111 | struct kvmppc_vcpu_44x *vcpu_44x; | |
112 | struct kvm_vcpu *vcpu; | |
113 | int err; | |
114 | ||
115 | vcpu_44x = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
116 | if (!vcpu_44x) { | |
117 | err = -ENOMEM; | |
118 | goto out; | |
119 | } | |
120 | ||
121 | vcpu = &vcpu_44x->vcpu; | |
122 | err = kvm_vcpu_init(vcpu, kvm, id); | |
123 | if (err) | |
124 | goto free_vcpu; | |
125 | ||
126 | return vcpu; | |
127 | ||
128 | free_vcpu: | |
129 | kmem_cache_free(kvm_vcpu_cache, vcpu_44x); | |
130 | out: | |
131 | return ERR_PTR(err); | |
132 | } | |
133 | ||
134 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
135 | { | |
136 | struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu); | |
137 | ||
138 | kvm_vcpu_uninit(vcpu); | |
139 | kmem_cache_free(kvm_vcpu_cache, vcpu_44x); | |
140 | } | |
141 | ||
2986b8c7 | 142 | static int __init kvmppc_44x_init(void) |
db93f574 HB |
143 | { |
144 | int r; | |
145 | ||
146 | r = kvmppc_booke_init(); | |
147 | if (r) | |
148 | return r; | |
149 | ||
150 | return kvm_init(NULL, sizeof(struct kvmppc_vcpu_44x), THIS_MODULE); | |
151 | } | |
152 | ||
2986b8c7 | 153 | static void __exit kvmppc_44x_exit(void) |
db93f574 HB |
154 | { |
155 | kvmppc_booke_exit(); | |
156 | } | |
157 | ||
158 | module_init(kvmppc_44x_init); | |
159 | module_exit(kvmppc_44x_exit); |