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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 | ||
ebc65874 | 46 | if (strncmp(cur_cpu_spec->platform, "ppc440", 6) == 0) |
9dd921cf HB |
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]. */ | |
ebc65874 | 75 | /* XXX CCR1 doesn't exist on all 440 SoCs. */ |
5cbb5106 HB |
76 | vcpu->arch.ccr1 = mfspr(SPRN_CCR1); |
77 | ||
7924bd41 HB |
78 | for (i = 0; i < ARRAY_SIZE(vcpu_44x->shadow_refs); i++) |
79 | vcpu_44x->shadow_refs[i].gtlb_index = -1; | |
80 | ||
5cbb5106 HB |
81 | return 0; |
82 | } | |
83 | ||
84 | /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ | |
85 | int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, | |
86 | struct kvm_translation *tr) | |
87 | { | |
5cbb5106 HB |
88 | int index; |
89 | gva_t eaddr; | |
90 | u8 pid; | |
91 | u8 as; | |
92 | ||
93 | eaddr = tr->linear_address; | |
94 | pid = (tr->linear_address >> 32) & 0xff; | |
95 | as = (tr->linear_address >> 40) & 0x1; | |
96 | ||
97 | index = kvmppc_44x_tlb_index(vcpu, eaddr, pid, as); | |
98 | if (index == -1) { | |
99 | tr->valid = 0; | |
100 | return 0; | |
101 | } | |
102 | ||
be8d1cae | 103 | tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); |
5cbb5106 HB |
104 | /* XXX what does "writeable" and "usermode" even mean? */ |
105 | tr->valid = 1; | |
106 | ||
107 | return 0; | |
108 | } | |
db93f574 HB |
109 | |
110 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) | |
111 | { | |
112 | struct kvmppc_vcpu_44x *vcpu_44x; | |
113 | struct kvm_vcpu *vcpu; | |
114 | int err; | |
115 | ||
116 | vcpu_44x = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
117 | if (!vcpu_44x) { | |
118 | err = -ENOMEM; | |
119 | goto out; | |
120 | } | |
121 | ||
122 | vcpu = &vcpu_44x->vcpu; | |
123 | err = kvm_vcpu_init(vcpu, kvm, id); | |
124 | if (err) | |
125 | goto free_vcpu; | |
126 | ||
96bc451a AG |
127 | vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO); |
128 | if (!vcpu->arch.shared) | |
129 | goto uninit_vcpu; | |
130 | ||
db93f574 HB |
131 | return vcpu; |
132 | ||
96bc451a AG |
133 | uninit_vcpu: |
134 | kvm_vcpu_uninit(vcpu); | |
db93f574 HB |
135 | free_vcpu: |
136 | kmem_cache_free(kvm_vcpu_cache, vcpu_44x); | |
137 | out: | |
138 | return ERR_PTR(err); | |
139 | } | |
140 | ||
141 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
142 | { | |
143 | struct kvmppc_vcpu_44x *vcpu_44x = to_44x(vcpu); | |
144 | ||
96bc451a | 145 | free_page((unsigned long)vcpu->arch.shared); |
db93f574 HB |
146 | kvm_vcpu_uninit(vcpu); |
147 | kmem_cache_free(kvm_vcpu_cache, vcpu_44x); | |
148 | } | |
149 | ||
2986b8c7 | 150 | static int __init kvmppc_44x_init(void) |
db93f574 HB |
151 | { |
152 | int r; | |
153 | ||
154 | r = kvmppc_booke_init(); | |
155 | if (r) | |
156 | return r; | |
157 | ||
0ee75bea | 158 | return kvm_init(NULL, sizeof(struct kvmppc_vcpu_44x), 0, THIS_MODULE); |
db93f574 HB |
159 | } |
160 | ||
2986b8c7 | 161 | static void __exit kvmppc_44x_exit(void) |
db93f574 HB |
162 | { |
163 | kvmppc_booke_exit(); | |
164 | } | |
165 | ||
166 | module_init(kvmppc_44x_init); | |
167 | module_exit(kvmppc_44x_exit); |