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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 | 22 | #include <linux/err.h> |
93087948 | 23 | #include <linux/export.h> |
db93f574 | 24 | |
9dd921cf HB |
25 | #include <asm/reg.h> |
26 | #include <asm/cputable.h> | |
27 | #include <asm/tlbflush.h> | |
db93f574 HB |
28 | #include <asm/kvm_44x.h> |
29 | #include <asm/kvm_ppc.h> | |
9dd921cf HB |
30 | |
31 | #include "44x_tlb.h" | |
32 | ||
9dd921cf HB |
33 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) |
34 | { | |
c5fbdffb | 35 | kvmppc_44x_tlb_load(vcpu); |
9dd921cf HB |
36 | } |
37 | ||
38 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) | |
39 | { | |
c5fbdffb | 40 | kvmppc_44x_tlb_put(vcpu); |
9dd921cf HB |
41 | } |
42 | ||
43 | int kvmppc_core_check_processor_compat(void) | |
44 | { | |
45 | int r; | |
46 | ||
ebc65874 | 47 | if (strncmp(cur_cpu_spec->platform, "ppc440", 6) == 0) |
9dd921cf HB |
48 | r = 0; |
49 | else | |
50 | r = -ENOTSUPP; | |
51 | ||
52 | return r; | |
53 | } | |
5cbb5106 HB |
54 | |
55 | int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) | |
56 | { | |
db93f574 HB |
57 | struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu); |
58 | struct kvmppc_44x_tlbe *tlbe = &vcpu_44x->guest_tlb[0]; | |
7924bd41 | 59 | int i; |
5cbb5106 HB |
60 | |
61 | tlbe->tid = 0; | |
62 | tlbe->word0 = PPC44x_TLB_16M | PPC44x_TLB_VALID; | |
63 | tlbe->word1 = 0; | |
64 | tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR; | |
65 | ||
66 | tlbe++; | |
67 | tlbe->tid = 0; | |
68 | tlbe->word0 = 0xef600000 | PPC44x_TLB_4K | PPC44x_TLB_VALID; | |
69 | tlbe->word1 = 0xef600000; | |
70 | tlbe->word2 = PPC44x_TLB_SX | PPC44x_TLB_SW | PPC44x_TLB_SR | |
71 | | PPC44x_TLB_I | PPC44x_TLB_G; | |
72 | ||
73 | /* Since the guest can directly access the timebase, it must know the | |
74 | * real timebase frequency. Accordingly, it must see the state of | |
75 | * CCR1[TCS]. */ | |
ebc65874 | 76 | /* XXX CCR1 doesn't exist on all 440 SoCs. */ |
5cbb5106 HB |
77 | vcpu->arch.ccr1 = mfspr(SPRN_CCR1); |
78 | ||
7924bd41 HB |
79 | for (i = 0; i < ARRAY_SIZE(vcpu_44x->shadow_refs); i++) |
80 | vcpu_44x->shadow_refs[i].gtlb_index = -1; | |
81 | ||
af8f38b3 AG |
82 | vcpu->arch.cpu_type = KVM_CPU_440; |
83 | ||
5cbb5106 HB |
84 | return 0; |
85 | } | |
86 | ||
87 | /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ | |
88 | int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, | |
89 | struct kvm_translation *tr) | |
90 | { | |
5cbb5106 HB |
91 | int index; |
92 | gva_t eaddr; | |
93 | u8 pid; | |
94 | u8 as; | |
95 | ||
96 | eaddr = tr->linear_address; | |
97 | pid = (tr->linear_address >> 32) & 0xff; | |
98 | as = (tr->linear_address >> 40) & 0x1; | |
99 | ||
100 | index = kvmppc_44x_tlb_index(vcpu, eaddr, pid, as); | |
101 | if (index == -1) { | |
102 | tr->valid = 0; | |
103 | return 0; | |
104 | } | |
105 | ||
be8d1cae | 106 | tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); |
5cbb5106 HB |
107 | /* XXX what does "writeable" and "usermode" even mean? */ |
108 | tr->valid = 1; | |
109 | ||
110 | return 0; | |
111 | } | |
db93f574 | 112 | |
5ce941ee SW |
113 | void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) |
114 | { | |
115 | kvmppc_get_sregs_ivor(vcpu, sregs); | |
116 | } | |
117 | ||
118 | int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs) | |
119 | { | |
120 | return kvmppc_set_sregs_ivor(vcpu, sregs); | |
121 | } | |
122 | ||
db93f574 HB |
123 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) |
124 | { | |
125 | struct kvmppc_vcpu_44x *vcpu_44x; | |
126 | struct kvm_vcpu *vcpu; | |
127 | int err; | |
128 | ||
129 | vcpu_44x = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
130 | if (!vcpu_44x) { | |
131 | err = -ENOMEM; | |
132 | goto out; | |
133 | } | |
134 | ||
135 | vcpu = &vcpu_44x->vcpu; | |
136 | err = kvm_vcpu_init(vcpu, kvm, id); | |
137 | if (err) | |
138 | goto free_vcpu; | |
139 | ||
96bc451a AG |
140 | vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
141 | if (!vcpu->arch.shared) | |
142 | goto uninit_vcpu; | |
143 | ||
db93f574 HB |
144 | return vcpu; |
145 | ||
96bc451a AG |
146 | uninit_vcpu: |
147 | kvm_vcpu_uninit(vcpu); | |
db93f574 HB |
148 | free_vcpu: |
149 | kmem_cache_free(kvm_vcpu_cache, vcpu_44x); | |
150 | out: | |
151 | return ERR_PTR(err); | |
152 | } | |
153 | ||
154 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
155 | { | |
156 | struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu); | |
157 | ||
96bc451a | 158 | free_page((unsigned long)vcpu->arch.shared); |
db93f574 HB |
159 | kvm_vcpu_uninit(vcpu); |
160 | kmem_cache_free(kvm_vcpu_cache, vcpu_44x); | |
161 | } | |
162 | ||
2986b8c7 | 163 | static int __init kvmppc_44x_init(void) |
db93f574 HB |
164 | { |
165 | int r; | |
166 | ||
167 | r = kvmppc_booke_init(); | |
168 | if (r) | |
169 | return r; | |
170 | ||
0ee75bea | 171 | return kvm_init(NULL, sizeof(struct kvmppc_vcpu_44x), 0, THIS_MODULE); |
db93f574 HB |
172 | } |
173 | ||
2986b8c7 | 174 | static void __exit kvmppc_44x_exit(void) |
db93f574 HB |
175 | { |
176 | kvmppc_booke_exit(); | |
177 | } | |
178 | ||
179 | module_init(kvmppc_44x_init); | |
180 | module_exit(kvmppc_44x_exit); |