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Linux/arch/powerpc/kvm/e500_emulate.c

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  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 #include <asm/reg_booke.h>
 19 
 20 #include "booke.h"
 21 #include "e500.h"
 22 
 23 #define XOP_DCBTLS  166
 24 #define XOP_MSGSND  206
 25 #define XOP_MSGCLR  238
 26 #define XOP_MFTMR   366
 27 #define XOP_TLBIVAX 786
 28 #define XOP_TLBSX   914
 29 #define XOP_TLBRE   946
 30 #define XOP_TLBWE   978
 31 #define XOP_TLBILX  18
 32 #define XOP_EHPRIV  270
 33 
 34 #ifdef CONFIG_KVM_E500MC
 35 static int dbell2prio(ulong param)
 36 {
 37         int msg = param & PPC_DBELL_TYPE_MASK;
 38         int prio = -1;
 39 
 40         switch (msg) {
 41         case PPC_DBELL_TYPE(PPC_DBELL):
 42                 prio = BOOKE_IRQPRIO_DBELL;
 43                 break;
 44         case PPC_DBELL_TYPE(PPC_DBELL_CRIT):
 45                 prio = BOOKE_IRQPRIO_DBELL_CRIT;
 46                 break;
 47         default:
 48                 break;
 49         }
 50 
 51         return prio;
 52 }
 53 
 54 static int kvmppc_e500_emul_msgclr(struct kvm_vcpu *vcpu, int rb)
 55 {
 56         ulong param = vcpu->arch.gpr[rb];
 57         int prio = dbell2prio(param);
 58 
 59         if (prio < 0)
 60                 return EMULATE_FAIL;
 61 
 62         clear_bit(prio, &vcpu->arch.pending_exceptions);
 63         return EMULATE_DONE;
 64 }
 65 
 66 static int kvmppc_e500_emul_msgsnd(struct kvm_vcpu *vcpu, int rb)
 67 {
 68         ulong param = vcpu->arch.gpr[rb];
 69         int prio = dbell2prio(rb);
 70         int pir = param & PPC_DBELL_PIR_MASK;
 71         int i;
 72         struct kvm_vcpu *cvcpu;
 73 
 74         if (prio < 0)
 75                 return EMULATE_FAIL;
 76 
 77         kvm_for_each_vcpu(i, cvcpu, vcpu->kvm) {
 78                 int cpir = cvcpu->arch.shared->pir;
 79                 if ((param & PPC_DBELL_MSG_BRDCAST) || (cpir == pir)) {
 80                         set_bit(prio, &cvcpu->arch.pending_exceptions);
 81                         kvm_vcpu_kick(cvcpu);
 82                 }
 83         }
 84 
 85         return EMULATE_DONE;
 86 }
 87 #endif
 88 
 89 static int kvmppc_e500_emul_ehpriv(struct kvm_run *run, struct kvm_vcpu *vcpu,
 90                                    unsigned int inst, int *advance)
 91 {
 92         int emulated = EMULATE_DONE;
 93 
 94         switch (get_oc(inst)) {
 95         case EHPRIV_OC_DEBUG:
 96                 run->exit_reason = KVM_EXIT_DEBUG;
 97                 run->debug.arch.address = vcpu->arch.pc;
 98                 run->debug.arch.status = 0;
 99                 kvmppc_account_exit(vcpu, DEBUG_EXITS);
100                 emulated = EMULATE_EXIT_USER;
101                 *advance = 0;
102                 break;
103         default:
104                 emulated = EMULATE_FAIL;
105         }
106         return emulated;
107 }
108 
109 static int kvmppc_e500_emul_dcbtls(struct kvm_vcpu *vcpu)
110 {
111         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
112 
113         /* Always fail to lock the cache */
114         vcpu_e500->l1csr0 |= L1CSR0_CUL;
115         return EMULATE_DONE;
116 }
117 
118 static int kvmppc_e500_emul_mftmr(struct kvm_vcpu *vcpu, unsigned int inst,
119                                   int rt)
120 {
121         /* Expose one thread per vcpu */
122         if (get_tmrn(inst) == TMRN_TMCFG0) {
123                 kvmppc_set_gpr(vcpu, rt,
124                                1 | (1 << TMRN_TMCFG0_NATHRD_SHIFT));
125                 return EMULATE_DONE;
126         }
127 
128         return EMULATE_FAIL;
129 }
130 
131 int kvmppc_core_emulate_op_e500(struct kvm_run *run, struct kvm_vcpu *vcpu,
132                                 unsigned int inst, int *advance)
133 {
134         int emulated = EMULATE_DONE;
135         int ra = get_ra(inst);
136         int rb = get_rb(inst);
137         int rt = get_rt(inst);
138         gva_t ea;
139 
140         switch (get_op(inst)) {
141         case 31:
142                 switch (get_xop(inst)) {
143 
144                 case XOP_DCBTLS:
145                         emulated = kvmppc_e500_emul_dcbtls(vcpu);
146                         break;
147 
148 #ifdef CONFIG_KVM_E500MC
149                 case XOP_MSGSND:
150                         emulated = kvmppc_e500_emul_msgsnd(vcpu, rb);
151                         break;
152 
153                 case XOP_MSGCLR:
154                         emulated = kvmppc_e500_emul_msgclr(vcpu, rb);
155                         break;
156 #endif
157 
158                 case XOP_TLBRE:
159                         emulated = kvmppc_e500_emul_tlbre(vcpu);
160                         break;
161 
162                 case XOP_TLBWE:
163                         emulated = kvmppc_e500_emul_tlbwe(vcpu);
164                         break;
165 
166                 case XOP_TLBSX:
167                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
168                         emulated = kvmppc_e500_emul_tlbsx(vcpu, ea);
169                         break;
170 
171                 case XOP_TLBILX: {
172                         int type = rt & 0x3;
173                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
174                         emulated = kvmppc_e500_emul_tlbilx(vcpu, type, ea);
175                         break;
176                 }
177 
178                 case XOP_TLBIVAX:
179                         ea = kvmppc_get_ea_indexed(vcpu, ra, rb);
180                         emulated = kvmppc_e500_emul_tlbivax(vcpu, ea);
181                         break;
182 
183                 case XOP_MFTMR:
184                         emulated = kvmppc_e500_emul_mftmr(vcpu, inst, rt);
185                         break;
186 
187                 case XOP_EHPRIV:
188                         emulated = kvmppc_e500_emul_ehpriv(run, vcpu, inst,
189                                                            advance);
190                         break;
191 
192                 default:
193                         emulated = EMULATE_FAIL;
194                 }
195 
196                 break;
197 
198         default:
199                 emulated = EMULATE_FAIL;
200         }
201 
202         if (emulated == EMULATE_FAIL)
203                 emulated = kvmppc_booke_emulate_op(run, vcpu, inst, advance);
204 
205         return emulated;
206 }
207 
208 int kvmppc_core_emulate_mtspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
209 {
210         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
211         int emulated = EMULATE_DONE;
212 
213         switch (sprn) {
214 #ifndef CONFIG_KVM_BOOKE_HV
215         case SPRN_PID:
216                 kvmppc_set_pid(vcpu, spr_val);
217                 break;
218         case SPRN_PID1:
219                 if (spr_val != 0)
220                         return EMULATE_FAIL;
221                 vcpu_e500->pid[1] = spr_val;
222                 break;
223         case SPRN_PID2:
224                 if (spr_val != 0)
225                         return EMULATE_FAIL;
226                 vcpu_e500->pid[2] = spr_val;
227                 break;
228         case SPRN_MAS0:
229                 vcpu->arch.shared->mas0 = spr_val;
230                 break;
231         case SPRN_MAS1:
232                 vcpu->arch.shared->mas1 = spr_val;
233                 break;
234         case SPRN_MAS2:
235                 vcpu->arch.shared->mas2 = spr_val;
236                 break;
237         case SPRN_MAS3:
238                 vcpu->arch.shared->mas7_3 &= ~(u64)0xffffffff;
239                 vcpu->arch.shared->mas7_3 |= spr_val;
240                 break;
241         case SPRN_MAS4:
242                 vcpu->arch.shared->mas4 = spr_val;
243                 break;
244         case SPRN_MAS6:
245                 vcpu->arch.shared->mas6 = spr_val;
246                 break;
247         case SPRN_MAS7:
248                 vcpu->arch.shared->mas7_3 &= (u64)0xffffffff;
249                 vcpu->arch.shared->mas7_3 |= (u64)spr_val << 32;
250                 break;
251 #endif
252         case SPRN_L1CSR0:
253                 vcpu_e500->l1csr0 = spr_val;
254                 vcpu_e500->l1csr0 &= ~(L1CSR0_DCFI | L1CSR0_CLFC);
255                 break;
256         case SPRN_L1CSR1:
257                 vcpu_e500->l1csr1 = spr_val;
258                 vcpu_e500->l1csr1 &= ~(L1CSR1_ICFI | L1CSR1_ICLFR);
259                 break;
260         case SPRN_HID0:
261                 vcpu_e500->hid0 = spr_val;
262                 break;
263         case SPRN_HID1:
264                 vcpu_e500->hid1 = spr_val;
265                 break;
266 
267         case SPRN_MMUCSR0:
268                 emulated = kvmppc_e500_emul_mt_mmucsr0(vcpu_e500,
269                                 spr_val);
270                 break;
271 
272         case SPRN_PWRMGTCR0:
273                 /*
274                  * Guest relies on host power management configurations
275                  * Treat the request as a general store
276                  */
277                 vcpu->arch.pwrmgtcr0 = spr_val;
278                 break;
279 
280         /* extra exceptions */
281 #ifdef CONFIG_SPE_POSSIBLE
282         case SPRN_IVOR32:
283                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL] = spr_val;
284                 break;
285         case SPRN_IVOR33:
286                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA] = spr_val;
287                 break;
288         case SPRN_IVOR34:
289                 vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND] = spr_val;
290                 break;
291 #endif
292 #ifdef CONFIG_ALTIVEC
293         case SPRN_IVOR32:
294                 vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL] = spr_val;
295                 break;
296         case SPRN_IVOR33:
297                 vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST] = spr_val;
298                 break;
299 #endif
300         case SPRN_IVOR35:
301                 vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR] = spr_val;
302                 break;
303 #ifdef CONFIG_KVM_BOOKE_HV
304         case SPRN_IVOR36:
305                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL] = spr_val;
306                 break;
307         case SPRN_IVOR37:
308                 vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT] = spr_val;
309                 break;
310 #endif
311         default:
312                 emulated = kvmppc_booke_emulate_mtspr(vcpu, sprn, spr_val);
313         }
314 
315         return emulated;
316 }
317 
318 int kvmppc_core_emulate_mfspr_e500(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
319 {
320         struct kvmppc_vcpu_e500 *vcpu_e500 = to_e500(vcpu);
321         int emulated = EMULATE_DONE;
322 
323         switch (sprn) {
324 #ifndef CONFIG_KVM_BOOKE_HV
325         case SPRN_PID:
326                 *spr_val = vcpu_e500->pid[0];
327                 break;
328         case SPRN_PID1:
329                 *spr_val = vcpu_e500->pid[1];
330                 break;
331         case SPRN_PID2:
332                 *spr_val = vcpu_e500->pid[2];
333                 break;
334         case SPRN_MAS0:
335                 *spr_val = vcpu->arch.shared->mas0;
336                 break;
337         case SPRN_MAS1:
338                 *spr_val = vcpu->arch.shared->mas1;
339                 break;
340         case SPRN_MAS2:
341                 *spr_val = vcpu->arch.shared->mas2;
342                 break;
343         case SPRN_MAS3:
344                 *spr_val = (u32)vcpu->arch.shared->mas7_3;
345                 break;
346         case SPRN_MAS4:
347                 *spr_val = vcpu->arch.shared->mas4;
348                 break;
349         case SPRN_MAS6:
350                 *spr_val = vcpu->arch.shared->mas6;
351                 break;
352         case SPRN_MAS7:
353                 *spr_val = vcpu->arch.shared->mas7_3 >> 32;
354                 break;
355 #endif
356         case SPRN_DECAR:
357                 *spr_val = vcpu->arch.decar;
358                 break;
359         case SPRN_TLB0CFG:
360                 *spr_val = vcpu->arch.tlbcfg[0];
361                 break;
362         case SPRN_TLB1CFG:
363                 *spr_val = vcpu->arch.tlbcfg[1];
364                 break;
365         case SPRN_TLB0PS:
366                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
367                         return EMULATE_FAIL;
368                 *spr_val = vcpu->arch.tlbps[0];
369                 break;
370         case SPRN_TLB1PS:
371                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
372                         return EMULATE_FAIL;
373                 *spr_val = vcpu->arch.tlbps[1];
374                 break;
375         case SPRN_L1CSR0:
376                 *spr_val = vcpu_e500->l1csr0;
377                 break;
378         case SPRN_L1CSR1:
379                 *spr_val = vcpu_e500->l1csr1;
380                 break;
381         case SPRN_HID0:
382                 *spr_val = vcpu_e500->hid0;
383                 break;
384         case SPRN_HID1:
385                 *spr_val = vcpu_e500->hid1;
386                 break;
387         case SPRN_SVR:
388                 *spr_val = vcpu_e500->svr;
389                 break;
390 
391         case SPRN_MMUCSR0:
392                 *spr_val = 0;
393                 break;
394 
395         case SPRN_MMUCFG:
396                 *spr_val = vcpu->arch.mmucfg;
397                 break;
398         case SPRN_EPTCFG:
399                 if (!has_feature(vcpu, VCPU_FTR_MMU_V2))
400                         return EMULATE_FAIL;
401                 /*
402                  * Legacy Linux guests access EPTCFG register even if the E.PT
403                  * category is disabled in the VM. Give them a chance to live.
404                  */
405                 *spr_val = vcpu->arch.eptcfg;
406                 break;
407 
408         case SPRN_PWRMGTCR0:
409                 *spr_val = vcpu->arch.pwrmgtcr0;
410                 break;
411 
412         /* extra exceptions */
413 #ifdef CONFIG_SPE_POSSIBLE
414         case SPRN_IVOR32:
415                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_UNAVAIL];
416                 break;
417         case SPRN_IVOR33:
418                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_DATA];
419                 break;
420         case SPRN_IVOR34:
421                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_SPE_FP_ROUND];
422                 break;
423 #endif
424 #ifdef CONFIG_ALTIVEC
425         case SPRN_IVOR32:
426                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_UNAVAIL];
427                 break;
428         case SPRN_IVOR33:
429                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_ALTIVEC_ASSIST];
430                 break;
431 #endif
432         case SPRN_IVOR35:
433                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_PERFORMANCE_MONITOR];
434                 break;
435 #ifdef CONFIG_KVM_BOOKE_HV
436         case SPRN_IVOR36:
437                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL];
438                 break;
439         case SPRN_IVOR37:
440                 *spr_val = vcpu->arch.ivor[BOOKE_IRQPRIO_DBELL_CRIT];
441                 break;
442 #endif
443         default:
444                 emulated = kvmppc_booke_emulate_mfspr(vcpu, sprn, spr_val);
445         }
446 
447         return emulated;
448 }
449 
450 

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