KVM: PPC: Emulator: clean up SPR reads and writes
[linux-3.10.git] / arch / powerpc / kvm / e500_emulate.c
1 /*
2  * Copyright (C) 2008-2011 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_emulate.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 <asm/kvm_ppc.h>
16 #include <asm/disassemble.h>
17 #include <asm/dbell.h>
18
19 #include "booke.h"
20 #include "e500.h"
21
22 #define XOP_MSGSND  206
23 #define XOP_MSGCLR  238
24 #define XOP_TLBIVAX 786
25 #define XOP_TLBSX   914
26 #define XOP_TLBRE   946
27 #define XOP_TLBWE   978
28 #define XOP_TLBILX  18
29
30 #ifdef CONFIG_KVM_E500MC
31 static int dbell2prio(ulong param)
32 {
33         int msg = param & PPC_DBELL_TYPE_MASK;
34         int prio = -1;
35
36         switch (msg) {
37         case PPC_DBELL_TYPE(PPC_DBELL):
38                 prio = BOOKE_IRQPRIO_DBELL;
39                 break;
40         case PPC_DBELL_TYPE(PPC_DBELL_CRIT):
41                 prio = BOOKE_IRQPRIO_DBELL_CRIT;
42                 break;
43         default:
44                 break;
45         }
46
47         return prio;
48 }
49
50 static int kvmppc_e500_emul_msgclr(struct kvm_vcpu *vcpu, int rb)
51 {
52         ulong param = vcpu->arch.gpr[rb];
53         int prio = dbell2prio(param);
54
55         if (prio < 0)
56                 return EMULATE_FAIL;
57
58         clear_bit(prio, &vcpu->arch.pending_exceptions);
59         return EMULATE_DONE;
60 }
61
62 static int kvmppc_e500_emul_msgsnd(struct kvm_vcpu *vcpu, int rb)
63 {
64         ulong param = vcpu->arch.gpr[rb];
65         int prio = dbell2prio(rb);
66         int pir = param & PPC_DBELL_PIR_MASK;
67         int i;
68         struct kvm_vcpu *cvcpu;
69
70         if (prio < 0)
71                 return EMULATE_FAIL;
72
73         kvm_for_each_vcpu(i, cvcpu, vcpu->kvm) {
74                 int cpir = cvcpu->arch.shared->pir;
75                 if ((param & PPC_DBELL_MSG_BRDCAST) || (cpir == pir)) {
76                         set_bit(prio, &cvcpu->arch.pending_exceptions);
77                         kvm_vcpu_kick(cvcpu);
78                 }
79         }
80
81         return EMULATE_DONE;
82 }
83 #endif
84
85 int kvmppc_core_emulate_op(struct kvm_run *run, struct kvm_vcpu *vcpu,
86                            unsigned int inst, int *advance)
87 {
88         int emulated = EMULATE_DONE;
89         int ra = get_ra(inst);
90         int rb = get_rb(inst);
91         int rt = get_rt(inst);
92
93         switch (get_op(inst)) {
94         case 31:
95                 switch (get_xop(inst)) {
96
97 #ifdef CONFIG_KVM_E500MC
98                 case XOP_MSGSND:
99                         emulated = kvmppc_e500_emul_msgsnd(vcpu, rb);
100                         break;
101
102                 case XOP_MSGCLR:
103                         emulated = kvmppc_e500_emul_msgclr(vcpu, rb);
104                         break;
105 #endif
106
107                 case XOP_TLBRE:
108                         emulated = kvmppc_e500_emul_tlbre(vcpu);
109                         break;
110
111                 case XOP_TLBWE:
112                         emulated = kvmppc_e500_emul_tlbwe(vcpu);
113                         break;
114
115                 case XOP_TLBSX:
116                         emulated = kvmppc_e500_emul_tlbsx(vcpu,rb);
117                         break;
118
119                 case XOP_TLBILX:
120                         emulated = kvmppc_e500_emul_tlbilx(vcpu, rt, ra, rb);
121                         break;
122
123                 case XOP_TLBIVAX:
124                         emulated = kvmppc_e500_emul_tlbivax(vcpu, ra, rb);
125                         break;
126
127                 default:
128                         emulated = EMULATE_FAIL;
129                 }
130
131                 break;
132
133         default:
134                 emulated = EMULATE_FAIL;
135         }
136
137         if (emulated == EMULATE_FAIL)
138                 emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
139
140         return emulated;
141 }
142
143 int kvmppc_core_emulate_mtspr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
144 {
145         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
146         int emulated = EMULATE_DONE;
147
148         switch (sprn) {
149 #ifndef CONFIG_KVM_BOOKE_HV
150         case SPRN_PID:
151                 kvmppc_set_pid(vcpu, spr_val);
152                 break;
153         case SPRN_PID1:
154                 if (spr_val != 0)
155                         return EMULATE_FAIL;
156                 vcpu_e500->pid[1] = spr_val;
157                 break;
158         case SPRN_PID2:
159                 if (spr_val != 0)
160                         return EMULATE_FAIL;
161                 vcpu_e500->pid[2] = spr_val;
162                 break;
163         case SPRN_MAS0:
164                 vcpu->arch.shared->mas0 = spr_val;
165                 break;
166         case SPRN_MAS1:
167                 vcpu->arch.shared->mas1 = spr_val;
168                 break;
169         case SPRN_MAS2:
170                 vcpu->arch.shared->mas2 = spr_val;
171                 break;
172         case SPRN_MAS3:
173                 vcpu->arch.shared->mas7_3 &= ~(u64)0xffffffff;
174                 vcpu->arch.shared->mas7_3 |= spr_val;
175                 break;
176         case SPRN_MAS4:
177                 vcpu->arch.shared->mas4 = spr_val;
178                 break;
179         case SPRN_MAS6:
180                 vcpu->arch.shared->mas6 = spr_val;
181                 break;
182         case SPRN_MAS7:
183                 vcpu->arch.shared->mas7_3 &= (u64)0xffffffff;
184                 vcpu->arch.shared->mas7_3 |= (u64)spr_val << 32;
185                 break;
186 #endif
187         case SPRN_L1CSR0:
188                 vcpu_e500->l1csr0 = spr_val;
189                 vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC);
190                 break;
191         case SPRN_L1CSR1:
192                 vcpu_e500->l1csr1 = spr_val;
193                 break;
194         case SPRN_HID0:
195                 vcpu_e500->hid0 = spr_val;
196                 break;
197         case SPRN_HID1:
198                 vcpu_e500->hid1 = spr_val;
199                 break;
200
201         case SPRN_MMUCSR0:
202                 emulated = kvmppc_e500_emul_mt_mmucsr0(vcpu_e500,
203                                 spr_val);
204                 break;
205
206         /* extra exceptions */
207         case SPRN_IVOR32:
208                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = spr_val;
209                 break;
210         case SPRN_IVOR33:
211                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = spr_val;
212                 break;
213         case SPRN_IVOR34:
214                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = spr_val;
215                 break;
216         case SPRN_IVOR35:
217                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val;
218                 break;
219 #ifdef CONFIG_KVM_BOOKE_HV
220         case SPRN_IVOR36:
221                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = spr_val;
222                 break;
223         case SPRN_IVOR37:
224                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = spr_val;
225                 break;
226 #endif
227         default:
228                 emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, spr_val);
229         }
230
231         return emulated;
232 }
233
234 int kvmppc_core_emulate_mfspr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
235 {
236         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
237         int emulated = EMULATE_DONE;
238
239         switch (sprn) {
240 #ifndef CONFIG_KVM_BOOKE_HV
241         case SPRN_PID:
242                 *spr_val = vcpu_e500->pid[0];
243                 break;
244         case SPRN_PID1:
245                 *spr_val = vcpu_e500->pid[1];
246                 break;
247         case SPRN_PID2:
248                 *spr_val = vcpu_e500->pid[2];
249                 break;
250         case SPRN_MAS0:
251                 *spr_val = vcpu->arch.shared->mas0;
252                 break;
253         case SPRN_MAS1:
254                 *spr_val = vcpu->arch.shared->mas1;
255                 break;
256         case SPRN_MAS2:
257                 *spr_val = vcpu->arch.shared->mas2;
258                 break;
259         case SPRN_MAS3:
260                 *spr_val = (u32)vcpu->arch.shared->mas7_3;
261                 break;
262         case SPRN_MAS4:
263                 *spr_val = vcpu->arch.shared->mas4;
264                 break;
265         case SPRN_MAS6:
266                 *spr_val = vcpu->arch.shared->mas6;
267                 break;
268         case SPRN_MAS7:
269                 *spr_val = vcpu->arch.shared->mas7_3 >> 32;
270                 break;
271 #endif
272         case SPRN_TLB0CFG:
273                 *spr_val = vcpu->arch.tlbcfg[0];
274                 break;
275         case SPRN_TLB1CFG:
276                 *spr_val = vcpu->arch.tlbcfg[1];
277                 break;
278         case SPRN_L1CSR0:
279                 *spr_val = vcpu_e500->l1csr0;
280                 break;
281         case SPRN_L1CSR1:
282                 *spr_val = vcpu_e500->l1csr1;
283                 break;
284         case SPRN_HID0:
285                 *spr_val = vcpu_e500->hid0;
286                 break;
287         case SPRN_HID1:
288                 *spr_val = vcpu_e500->hid1;
289                 break;
290         case SPRN_SVR:
291                 *spr_val = vcpu_e500->svr;
292                 break;
293
294         case SPRN_MMUCSR0:
295                 *spr_val = 0;
296                 break;
297
298         case SPRN_MMUCFG:
299                 *spr_val = vcpu->arch.mmucfg;
300                 break;
301
302         /* extra exceptions */
303         case SPRN_IVOR32:
304                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
305                 break;
306         case SPRN_IVOR33:
307                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
308                 break;
309         case SPRN_IVOR34:
310                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
311                 break;
312         case SPRN_IVOR35:
313                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
314                 break;
315 #ifdef CONFIG_KVM_BOOKE_HV
316         case SPRN_IVOR36:
317                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL];
318                 break;
319         case SPRN_IVOR37:
320                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT];
321                 break;
322 #endif
323         default:
324                 emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, spr_val);
325         }
326
327         return emulated;
328 }
329