KVM: PPC: booke: add sregs support
[linux-2.6.git] / arch / powerpc / kvm / e500.c
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/slab.h>
17 #include <linux/err.h>
18
19 #include <asm/reg.h>
20 #include <asm/cputable.h>
21 #include <asm/tlbflush.h>
22 #include <asm/kvm_e500.h>
23 #include <asm/kvm_ppc.h>
24
25 #include "booke.h"
26 #include "e500_tlb.h"
27
28 void kvmppc_core_load_host_debugstate(struct kvm_vcpu *vcpu)
29 {
30 }
31
32 void kvmppc_core_load_guest_debugstate(struct kvm_vcpu *vcpu)
33 {
34 }
35
36 void kvmppc_core_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
37 {
38         kvmppc_e500_tlb_load(vcpu, cpu);
39 }
40
41 void kvmppc_core_vcpu_put(struct kvm_vcpu *vcpu)
42 {
43         kvmppc_e500_tlb_put(vcpu);
44 }
45
46 int kvmppc_core_check_processor_compat(void)
47 {
48         int r;
49
50         if (strcmp(cur_cpu_spec->cpu_name, "e500v2") == 0)
51                 r = 0;
52         else
53                 r = -ENOTSUPP;
54
55         return r;
56 }
57
58 int kvmppc_core_vcpu_setup(struct kvm_vcpu *vcpu)
59 {
60         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
61
62         kvmppc_e500_tlb_setup(vcpu_e500);
63
64         /* Registers init */
65         vcpu->arch.pvr = mfspr(SPRN_PVR);
66         vcpu_e500->svr = mfspr(SPRN_SVR);
67
68         /* Since booke kvm only support one core, update all vcpus' PIR to 0 */
69         vcpu->vcpu_id = 0;
70
71         return 0;
72 }
73
74 /* 'linear_address' is actually an encoding of AS|PID|EADDR . */
75 int kvmppc_core_vcpu_translate(struct kvm_vcpu *vcpu,
76                                struct kvm_translation *tr)
77 {
78         int index;
79         gva_t eaddr;
80         u8 pid;
81         u8 as;
82
83         eaddr = tr->linear_address;
84         pid = (tr->linear_address >> 32) & 0xff;
85         as = (tr->linear_address >> 40) & 0x1;
86
87         index = kvmppc_e500_tlb_search(vcpu, eaddr, pid, as);
88         if (index < 0) {
89                 tr->valid = 0;
90                 return 0;
91         }
92
93         tr->physical_address = kvmppc_mmu_xlate(vcpu, index, eaddr);
94         /* XXX what does "writeable" and "usermode" even mean? */
95         tr->valid = 1;
96
97         return 0;
98 }
99
100 void kvmppc_core_get_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
101 {
102         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
103
104         sregs->u.e.features |= KVM_SREGS_E_ARCH206_MMU | KVM_SREGS_E_SPE |
105                                KVM_SREGS_E_PM;
106         sregs->u.e.impl_id = KVM_SREGS_E_IMPL_FSL;
107
108         sregs->u.e.impl.fsl.features = 0;
109         sregs->u.e.impl.fsl.svr = vcpu_e500->svr;
110         sregs->u.e.impl.fsl.hid0 = vcpu_e500->hid0;
111         sregs->u.e.impl.fsl.mcar = vcpu_e500->mcar;
112
113         sregs->u.e.mas0 = vcpu_e500->mas0;
114         sregs->u.e.mas1 = vcpu_e500->mas1;
115         sregs->u.e.mas2 = vcpu_e500->mas2;
116         sregs->u.e.mas7_3 = ((u64)vcpu_e500->mas7 << 32) | vcpu_e500->mas3;
117         sregs->u.e.mas4 = vcpu_e500->mas4;
118         sregs->u.e.mas6 = vcpu_e500->mas6;
119
120         sregs->u.e.mmucfg = mfspr(SPRN_MMUCFG);
121         sregs->u.e.tlbcfg[0] = vcpu_e500->tlb0cfg;
122         sregs->u.e.tlbcfg[1] = vcpu_e500->tlb1cfg;
123         sregs->u.e.tlbcfg[2] = 0;
124         sregs->u.e.tlbcfg[3] = 0;
125
126         sregs->u.e.ivor_high[0] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
127         sregs->u.e.ivor_high[1] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
128         sregs->u.e.ivor_high[2] = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
129         sregs->u.e.ivor_high[3] =
130                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
131
132         kvmppc_get_sregs_ivor(vcpu, sregs);
133 }
134
135 int kvmppc_core_set_sregs(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
136 {
137         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
138
139         if (sregs->u.e.impl_id == KVM_SREGS_E_IMPL_FSL) {
140                 vcpu_e500->svr = sregs->u.e.impl.fsl.svr;
141                 vcpu_e500->hid0 = sregs->u.e.impl.fsl.hid0;
142                 vcpu_e500->mcar = sregs->u.e.impl.fsl.mcar;
143         }
144
145         if (sregs->u.e.features & KVM_SREGS_E_ARCH206_MMU) {
146                 vcpu_e500->mas0 = sregs->u.e.mas0;
147                 vcpu_e500->mas1 = sregs->u.e.mas1;
148                 vcpu_e500->mas2 = sregs->u.e.mas2;
149                 vcpu_e500->mas7 = sregs->u.e.mas7_3 >> 32;
150                 vcpu_e500->mas3 = (u32)sregs->u.e.mas7_3;
151                 vcpu_e500->mas4 = sregs->u.e.mas4;
152                 vcpu_e500->mas6 = sregs->u.e.mas6;
153         }
154
155         if (!(sregs->u.e.features & KVM_SREGS_E_IVOR))
156                 return 0;
157
158         if (sregs->u.e.features & KVM_SREGS_E_SPE) {
159                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] =
160                         sregs->u.e.ivor_high[0];
161                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] =
162                         sregs->u.e.ivor_high[1];
163                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] =
164                         sregs->u.e.ivor_high[2];
165         }
166
167         if (sregs->u.e.features & KVM_SREGS_E_PM) {
168                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] =
169                         sregs->u.e.ivor_high[3];
170         }
171
172         return kvmppc_set_sregs_ivor(vcpu, sregs);
173 }
174
175 struct kvm_vcpu *kvmppc_core_vcpu_create(struct kvm *kvm, unsigned int id)
176 {
177         struct kvmppc_vcpu_e500 *vcpu_e500;
178         struct kvm_vcpu *vcpu;
179         int err;
180
181         vcpu_e500 = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
182         if (!vcpu_e500) {
183                 err = -ENOMEM;
184                 goto out;
185         }
186
187         vcpu = &vcpu_e500->vcpu;
188         err = kvm_vcpu_init(vcpu, kvm, id);
189         if (err)
190                 goto free_vcpu;
191
192         err = kvmppc_e500_tlb_init(vcpu_e500);
193         if (err)
194                 goto uninit_vcpu;
195
196         vcpu->arch.shared = (void*)__get_free_page(GFP_KERNEL|__GFP_ZERO);
197         if (!vcpu->arch.shared)
198                 goto uninit_tlb;
199
200         return vcpu;
201
202 uninit_tlb:
203         kvmppc_e500_tlb_uninit(vcpu_e500);
204 uninit_vcpu:
205         kvm_vcpu_uninit(vcpu);
206 free_vcpu:
207         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
208 out:
209         return ERR_PTR(err);
210 }
211
212 void kvmppc_core_vcpu_free(struct kvm_vcpu *vcpu)
213 {
214         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
215
216         free_page((unsigned long)vcpu->arch.shared);
217         kvm_vcpu_uninit(vcpu);
218         kvmppc_e500_tlb_uninit(vcpu_e500);
219         kmem_cache_free(kvm_vcpu_cache, vcpu_e500);
220 }
221
222 static int __init kvmppc_e500_init(void)
223 {
224         int r, i;
225         unsigned long ivor[3];
226         unsigned long max_ivor = 0;
227
228         r = kvmppc_booke_init();
229         if (r)
230                 return r;
231
232         /* copy extra E500 exception handlers */
233         ivor[0] = mfspr(SPRN_IVOR32);
234         ivor[1] = mfspr(SPRN_IVOR33);
235         ivor[2] = mfspr(SPRN_IVOR34);
236         for (i = 0; i < 3; i++) {
237                 if (ivor[i] > max_ivor)
238                         max_ivor = ivor[i];
239
240                 memcpy((void *)kvmppc_booke_handlers + ivor[i],
241                        kvmppc_handlers_start + (i + 16) * kvmppc_handler_len,
242                        kvmppc_handler_len);
243         }
244         flush_icache_range(kvmppc_booke_handlers,
245                         kvmppc_booke_handlers + max_ivor + kvmppc_handler_len);
246
247         return kvm_init(NULL, sizeof(struct kvmppc_vcpu_e500), 0, THIS_MODULE);
248 }
249
250 static void __exit kvmppc_e500_exit(void)
251 {
252         kvmppc_booke_exit();
253 }
254
255 module_init(kvmppc_e500_init);
256 module_exit(kvmppc_e500_exit);