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bc8080cb HB |
1 | /* |
2 | * Copyright (C) 2008 Freescale Semiconductor, Inc. All rights reserved. | |
3 | * | |
4 | * Author: Yu Liu, <yu.liu@freescale.com> | |
5 | * | |
6 | * Description: | |
7 | * This file is derived from arch/powerpc/kvm/44x.c, | |
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 | #include <linux/kvm_host.h> | |
16 | #include <linux/err.h> | |
17 | ||
18 | #include <asm/reg.h> | |
19 | #include <asm/cputable.h> | |
20 | #include <asm/tlbflush.h> | |
21 | #include <asm/kvm_e500.h> | |
22 | #include <asm/kvm_ppc.h> | |
23 | ||
bb3a8a17 | 24 | #include "booke.h" |
bc8080cb HB |
25 | #include "e500_tlb.h" |
26 | ||
27 | void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu) | |
28 | { | |
29 | } | |
30 | ||
31 | void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu) | |
32 | { | |
33 | } | |
34 | ||
35 | void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu) | |
36 | { | |
37 | kvmppc_e500_tlb_load(vcpu, cpu); | |
38 | } | |
39 | ||
40 | void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu) | |
41 | { | |
42 | kvmppc_e500_tlb_put(vcpu); | |
43 | } | |
44 | ||
45 | int kvmppc_core_check_processor_compat(void) | |
46 | { | |
47 | int r; | |
48 | ||
49 | if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0) | |
50 | r = 0; | |
51 | else | |
52 | r = -ENOTSUPP; | |
53 | ||
54 | return r; | |
55 | } | |
56 | ||
57 | int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu) | |
58 | { | |
59 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
60 | ||
61 | kvmppc_e500_tlb_setup(vcpu_e500); | |
62 | ||
a9040f27 LY |
63 | /* Registers init */ |
64 | vcpu->arch.pvr = mfspr(SPRN_PVR); | |
65 | ||
66 | /* Since booke kvm only support one core, update all vcpus' PIR to 0 */ | |
67 | vcpu->vcpu_id = 0; | |
68 | ||
bc8080cb HB |
69 | return 0; |
70 | } | |
71 | ||
72 | /* 'linear_address' is actually an encoding of AS|PID|EADDR . */ | |
73 | int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu, | |
74 | struct kvm_translation *tr) | |
75 | { | |
76 | int index; | |
77 | gva_t eaddr; | |
78 | u8 pid; | |
79 | u8 as; | |
80 | ||
81 | eaddr = tr->linear_address; | |
82 | pid = (tr->linear_address >> 32) & 0xff; | |
83 | as = (tr->linear_address >> 40) & 0x1; | |
84 | ||
85 | index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as); | |
86 | if (index < 0) { | |
87 | tr->valid = 0; | |
88 | return 0; | |
89 | } | |
90 | ||
91 | tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr); | |
92 | /* XXX what does "writeable" and "usermode" even mean? */ | |
93 | tr->valid = 1; | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id) | |
99 | { | |
100 | struct kvmppc_vcpu_e500 *vcpu_e500; | |
101 | struct kvm_vcpu *vcpu; | |
102 | int err; | |
103 | ||
104 | vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL); | |
105 | if (!vcpu_e500) { | |
106 | err = -ENOMEM; | |
107 | goto out; | |
108 | } | |
109 | ||
110 | vcpu = &vcpu_e500->vcpu; | |
111 | err = kvm_vcpu_init(vcpu, kvm, id); | |
112 | if (err) | |
113 | goto free_vcpu; | |
114 | ||
115 | err = kvmppc_e500_tlb_init(vcpu_e500); | |
116 | if (err) | |
117 | goto uninit_vcpu; | |
118 | ||
119 | return vcpu; | |
120 | ||
121 | uninit_vcpu: | |
122 | kvm_vcpu_uninit(vcpu); | |
123 | free_vcpu: | |
124 | kmem_cache_free(kvm_vcpu_cache, vcpu_e500); | |
125 | out: | |
126 | return ERR_PTR(err); | |
127 | } | |
128 | ||
129 | void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu) | |
130 | { | |
131 | struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu); | |
132 | ||
133 | kvmppc_e500_tlb_uninit(vcpu_e500); | |
134 | kvm_vcpu_uninit(vcpu); | |
135 | kmem_cache_free(kvm_vcpu_cache, vcpu_e500); | |
136 | } | |
137 | ||
2986b8c7 | 138 | static int __init kvmppc_e500_init(void) |
bc8080cb | 139 | { |
bb3a8a17 HB |
140 | int r, i; |
141 | unsigned long ivor[3]; | |
142 | unsigned long max_ivor = 0; | |
bc8080cb HB |
143 | |
144 | r = kvmppc_booke_init(); | |
145 | if (r) | |
146 | return r; | |
147 | ||
bb3a8a17 HB |
148 | /* copy extra E500 exception handlers */ |
149 | ivor[0] = mfspr(SPRN_IVOR32); | |
150 | ivor[1] = mfspr(SPRN_IVOR33); | |
151 | ivor[2] = mfspr(SPRN_IVOR34); | |
152 | for (i = 0; i < 3; i++) { | |
153 | if (ivor[i] > max_ivor) | |
154 | max_ivor = ivor[i]; | |
155 | ||
156 | memcpy((void *)kvmppc_booke_handlers + ivor[i], | |
157 | kvmppc_handlers_start + (i + 16) * kvmppc_handler_len, | |
158 | kvmppc_handler_len); | |
159 | } | |
160 | flush_icache_range(kvmppc_booke_handlers, | |
161 | kvmppc_booke_handlers + max_ivor + kvmppc_handler_len); | |
162 | ||
bc8080cb HB |
163 | return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), THIS_MODULE); |
164 | } | |
165 | ||
2986b8c7 | 166 | static void __init kvmppc_e500_exit(void) |
bc8080cb HB |
167 | { |
168 | kvmppc_booke_exit(); | |
169 | } | |
170 | ||
171 | module_init(kvmppc_e500_init); | |
172 | module_exit(kvmppc_e500_exit); |