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.
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.
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.
15 * Copyright SUSE Linux Products GmbH 2009
17 * Authors: Alexander Graf <agraf@suse.de>
20 #include <asm/kvm_ppc.h>
21 #include <asm/disassemble.h>
22 #include <asm/kvm_book3s.h>
24 #include <asm/switch_to.h>
28 #define OP_19_XOP_RFID 18
29 #define OP_19_XOP_RFI 50
31 #define OP_31_XOP_MFMSR 83
32 #define OP_31_XOP_MTMSR 146
33 #define OP_31_XOP_MTMSRD 178
34 #define OP_31_XOP_MTSR 210
35 #define OP_31_XOP_MTSRIN 242
36 #define OP_31_XOP_TLBIEL 274
37 #define OP_31_XOP_TLBIE 306
38 /* Opcode is officially reserved, reuse it as sc 1 when sc 1 doesn't trap */
39 #define OP_31_XOP_FAKE_SC1 308
40 #define OP_31_XOP_SLBMTE 402
41 #define OP_31_XOP_SLBIE 434
42 #define OP_31_XOP_SLBIA 498
43 #define OP_31_XOP_MFSR 595
44 #define OP_31_XOP_MFSRIN 659
45 #define OP_31_XOP_DCBA 758
46 #define OP_31_XOP_SLBMFEV 851
47 #define OP_31_XOP_EIOIO 854
48 #define OP_31_XOP_SLBMFEE 915
50 /* DCBZ is actually 1014, but we patch it to 1010 so we get a trap */
51 #define OP_31_XOP_DCBZ 1010
67 /* Book3S_32 defines mfsrin(v) - but that messes up our abstract
68 * function pointers, so let's just disable the define. */
77 static bool spr_allowed(struct kvm_vcpu *vcpu, enum priv_level level)
79 /* PAPR VMs only access supervisor SPRs */
80 if (vcpu->arch.papr_enabled && (level > PRIV_SUPER))
83 /* Limit user space to its own small SPR set */
84 if ((kvmppc_get_msr(vcpu) & MSR_PR) && level > PRIV_PROBLEM)
90 int kvmppc_core_emulate_op_pr(struct kvm_run *run, struct kvm_vcpu *vcpu,
91 unsigned int inst, int *advance)
93 int emulated = EMULATE_DONE;
94 int rt = get_rt(inst);
95 int rs = get_rs(inst);
96 int ra = get_ra(inst);
97 int rb = get_rb(inst);
98 u32 inst_sc = 0x44000002;
100 switch (get_op(inst)) {
102 emulated = EMULATE_FAIL;
103 if ((kvmppc_get_msr(vcpu) & MSR_LE) &&
104 (inst == swab32(inst_sc))) {
106 * This is the byte reversed syscall instruction of our
107 * hypercall handler. Early versions of LE Linux didn't
108 * swap the instructions correctly and ended up in
109 * illegal instructions.
110 * Just always fail hypercalls on these broken systems.
112 kvmppc_set_gpr(vcpu, 3, EV_UNIMPLEMENTED);
113 kvmppc_set_pc(vcpu, kvmppc_get_pc(vcpu) + 4);
114 emulated = EMULATE_DONE;
118 switch (get_xop(inst)) {
121 kvmppc_set_pc(vcpu, kvmppc_get_srr0(vcpu));
122 kvmppc_set_msr(vcpu, kvmppc_get_srr1(vcpu));
127 emulated = EMULATE_FAIL;
132 switch (get_xop(inst)) {
133 case OP_31_XOP_MFMSR:
134 kvmppc_set_gpr(vcpu, rt, kvmppc_get_msr(vcpu));
136 case OP_31_XOP_MTMSRD:
138 ulong rs_val = kvmppc_get_gpr(vcpu, rs);
139 if (inst & 0x10000) {
140 ulong new_msr = kvmppc_get_msr(vcpu);
141 new_msr &= ~(MSR_RI | MSR_EE);
142 new_msr |= rs_val & (MSR_RI | MSR_EE);
143 kvmppc_set_msr_fast(vcpu, new_msr);
145 kvmppc_set_msr(vcpu, rs_val);
148 case OP_31_XOP_MTMSR:
149 kvmppc_set_msr(vcpu, kvmppc_get_gpr(vcpu, rs));
155 srnum = kvmppc_get_field(inst, 12 + 32, 15 + 32);
156 if (vcpu->arch.mmu.mfsrin) {
158 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
159 kvmppc_set_gpr(vcpu, rt, sr);
163 case OP_31_XOP_MFSRIN:
167 srnum = (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf;
168 if (vcpu->arch.mmu.mfsrin) {
170 sr = vcpu->arch.mmu.mfsrin(vcpu, srnum);
171 kvmppc_set_gpr(vcpu, rt, sr);
176 vcpu->arch.mmu.mtsrin(vcpu,
178 kvmppc_get_gpr(vcpu, rs));
180 case OP_31_XOP_MTSRIN:
181 vcpu->arch.mmu.mtsrin(vcpu,
182 (kvmppc_get_gpr(vcpu, rb) >> 28) & 0xf,
183 kvmppc_get_gpr(vcpu, rs));
185 case OP_31_XOP_TLBIE:
186 case OP_31_XOP_TLBIEL:
188 bool large = (inst & 0x00200000) ? true : false;
189 ulong addr = kvmppc_get_gpr(vcpu, rb);
190 vcpu->arch.mmu.tlbie(vcpu, addr, large);
193 #ifdef CONFIG_PPC_BOOK3S_64
194 case OP_31_XOP_FAKE_SC1:
196 /* SC 1 papr hypercalls */
197 ulong cmd = kvmppc_get_gpr(vcpu, 3);
200 if ((kvmppc_get_msr(vcpu) & MSR_PR) ||
201 !vcpu->arch.papr_enabled) {
202 emulated = EMULATE_FAIL;
206 if (kvmppc_h_pr(vcpu, cmd) == EMULATE_DONE)
209 run->papr_hcall.nr = cmd;
210 for (i = 0; i < 9; ++i) {
211 ulong gpr = kvmppc_get_gpr(vcpu, 4 + i);
212 run->papr_hcall.args[i] = gpr;
215 run->exit_reason = KVM_EXIT_PAPR_HCALL;
216 vcpu->arch.hcall_needed = 1;
217 emulated = EMULATE_EXIT_USER;
221 case OP_31_XOP_EIOIO:
223 case OP_31_XOP_SLBMTE:
224 if (!vcpu->arch.mmu.slbmte)
227 vcpu->arch.mmu.slbmte(vcpu,
228 kvmppc_get_gpr(vcpu, rs),
229 kvmppc_get_gpr(vcpu, rb));
231 case OP_31_XOP_SLBIE:
232 if (!vcpu->arch.mmu.slbie)
235 vcpu->arch.mmu.slbie(vcpu,
236 kvmppc_get_gpr(vcpu, rb));
238 case OP_31_XOP_SLBIA:
239 if (!vcpu->arch.mmu.slbia)
242 vcpu->arch.mmu.slbia(vcpu);
244 case OP_31_XOP_SLBMFEE:
245 if (!vcpu->arch.mmu.slbmfee) {
246 emulated = EMULATE_FAIL;
250 rb_val = kvmppc_get_gpr(vcpu, rb);
251 t = vcpu->arch.mmu.slbmfee(vcpu, rb_val);
252 kvmppc_set_gpr(vcpu, rt, t);
255 case OP_31_XOP_SLBMFEV:
256 if (!vcpu->arch.mmu.slbmfev) {
257 emulated = EMULATE_FAIL;
261 rb_val = kvmppc_get_gpr(vcpu, rb);
262 t = vcpu->arch.mmu.slbmfev(vcpu, rb_val);
263 kvmppc_set_gpr(vcpu, rt, t);
267 /* Gets treated as NOP */
271 ulong rb_val = kvmppc_get_gpr(vcpu, rb);
274 u32 zeros[8] = { 0, 0, 0, 0, 0, 0, 0, 0 };
279 ra_val = kvmppc_get_gpr(vcpu, ra);
281 addr = (ra_val + rb_val) & ~31ULL;
282 if (!(kvmppc_get_msr(vcpu) & MSR_SF))
286 r = kvmppc_st(vcpu, &addr, 32, zeros, true);
287 if ((r == -ENOENT) || (r == -EPERM)) {
289 kvmppc_set_dar(vcpu, vaddr);
290 vcpu->arch.fault_dar = vaddr;
292 dsisr = DSISR_ISSTORE;
294 dsisr |= DSISR_NOHPTE;
295 else if (r == -EPERM)
296 dsisr |= DSISR_PROTFAULT;
298 kvmppc_set_dsisr(vcpu, dsisr);
299 vcpu->arch.fault_dsisr = dsisr;
301 kvmppc_book3s_queue_irqprio(vcpu,
302 BOOK3S_INTERRUPT_DATA_STORAGE);
308 emulated = EMULATE_FAIL;
312 emulated = EMULATE_FAIL;
315 if (emulated == EMULATE_FAIL)
316 emulated = kvmppc_emulate_paired_single(run, vcpu);
321 void kvmppc_set_bat(struct kvm_vcpu *vcpu, struct kvmppc_bat *bat, bool upper,
326 u32 bl = (val >> 2) & 0x7ff;
327 bat->bepi_mask = (~bl << 17);
328 bat->bepi = val & 0xfffe0000;
329 bat->vs = (val & 2) ? 1 : 0;
330 bat->vp = (val & 1) ? 1 : 0;
331 bat->raw = (bat->raw & 0xffffffff00000000ULL) | val;
334 bat->brpn = val & 0xfffe0000;
335 bat->wimg = (val >> 3) & 0xf;
337 bat->raw = (bat->raw & 0x00000000ffffffffULL) | ((u64)val << 32);
341 static struct kvmppc_bat *kvmppc_find_bat(struct kvm_vcpu *vcpu, int sprn)
343 struct kvmppc_vcpu_book3s *vcpu_book3s = to_book3s(vcpu);
344 struct kvmppc_bat *bat;
347 case SPRN_IBAT0U ... SPRN_IBAT3L:
348 bat = &vcpu_book3s->ibat[(sprn - SPRN_IBAT0U) / 2];
350 case SPRN_IBAT4U ... SPRN_IBAT7L:
351 bat = &vcpu_book3s->ibat[4 + ((sprn - SPRN_IBAT4U) / 2)];
353 case SPRN_DBAT0U ... SPRN_DBAT3L:
354 bat = &vcpu_book3s->dbat[(sprn - SPRN_DBAT0U) / 2];
356 case SPRN_DBAT4U ... SPRN_DBAT7L:
357 bat = &vcpu_book3s->dbat[4 + ((sprn - SPRN_DBAT4U) / 2)];
366 int kvmppc_core_emulate_mtspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong spr_val)
368 int emulated = EMULATE_DONE;
372 if (!spr_allowed(vcpu, PRIV_HYPER))
374 to_book3s(vcpu)->sdr1 = spr_val;
377 kvmppc_set_dsisr(vcpu, spr_val);
380 kvmppc_set_dar(vcpu, spr_val);
383 to_book3s(vcpu)->hior = spr_val;
385 case SPRN_IBAT0U ... SPRN_IBAT3L:
386 case SPRN_IBAT4U ... SPRN_IBAT7L:
387 case SPRN_DBAT0U ... SPRN_DBAT3L:
388 case SPRN_DBAT4U ... SPRN_DBAT7L:
390 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
392 kvmppc_set_bat(vcpu, bat, !(sprn % 2), (u32)spr_val);
393 /* BAT writes happen so rarely that we're ok to flush
395 kvmppc_mmu_pte_flush(vcpu, 0, 0);
396 kvmppc_mmu_flush_segments(vcpu);
400 to_book3s(vcpu)->hid[0] = spr_val;
403 to_book3s(vcpu)->hid[1] = spr_val;
406 to_book3s(vcpu)->hid[2] = spr_val;
408 case SPRN_HID2_GEKKO:
409 to_book3s(vcpu)->hid[2] = spr_val;
410 /* HID2.PSE controls paired single on gekko */
411 switch (vcpu->arch.pvr) {
412 case 0x00080200: /* lonestar 2.0 */
413 case 0x00088202: /* lonestar 2.2 */
414 case 0x70000100: /* gekko 1.0 */
415 case 0x00080100: /* gekko 2.0 */
416 case 0x00083203: /* gekko 2.3a */
417 case 0x00083213: /* gekko 2.3b */
418 case 0x00083204: /* gekko 2.4 */
419 case 0x00083214: /* gekko 2.4e (8SE) - retail HW2 */
420 case 0x00087200: /* broadway */
421 if (vcpu->arch.hflags & BOOK3S_HFLAG_NATIVE_PS) {
422 /* Native paired singles */
423 } else if (spr_val & (1 << 29)) { /* HID2.PSE */
424 vcpu->arch.hflags |= BOOK3S_HFLAG_PAIRED_SINGLE;
425 kvmppc_giveup_ext(vcpu, MSR_FP);
427 vcpu->arch.hflags &= ~BOOK3S_HFLAG_PAIRED_SINGLE;
433 case SPRN_HID4_GEKKO:
434 to_book3s(vcpu)->hid[4] = spr_val;
437 to_book3s(vcpu)->hid[5] = spr_val;
438 /* guest HID5 set can change is_dcbz32 */
439 if (vcpu->arch.mmu.is_dcbz32(vcpu) &&
441 vcpu->arch.hflags |= BOOK3S_HFLAG_DCBZ32;
451 to_book3s(vcpu)->gqr[sprn - SPRN_GQR0] = spr_val;
453 #ifdef CONFIG_PPC_BOOK3S_64
455 kvmppc_set_fscr(vcpu, spr_val);
458 vcpu->arch.bescr = spr_val;
461 vcpu->arch.ebbhr = spr_val;
464 vcpu->arch.ebbrr = spr_val;
466 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
468 vcpu->arch.tfhar = spr_val;
471 vcpu->arch.texasr = spr_val;
474 vcpu->arch.tfiar = spr_val;
486 case SPRN_MMCR0_GEKKO:
487 case SPRN_MMCR1_GEKKO:
488 case SPRN_PMC1_GEKKO:
489 case SPRN_PMC2_GEKKO:
490 case SPRN_PMC3_GEKKO:
491 case SPRN_PMC4_GEKKO:
492 case SPRN_WPAR_GEKKO:
495 #ifdef CONFIG_PPC_BOOK3S_64
506 pr_info_ratelimited("KVM: invalid SPR write: %d\n", sprn);
508 if (kvmppc_get_msr(vcpu) & MSR_PR) {
509 kvmppc_core_queue_program(vcpu, SRR1_PROGPRIV);
510 emulated = EMULATE_AGAIN;
513 if ((kvmppc_get_msr(vcpu) & MSR_PR) || sprn == 0) {
514 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
515 emulated = EMULATE_AGAIN;
524 int kvmppc_core_emulate_mfspr_pr(struct kvm_vcpu *vcpu, int sprn, ulong *spr_val)
526 int emulated = EMULATE_DONE;
529 case SPRN_IBAT0U ... SPRN_IBAT3L:
530 case SPRN_IBAT4U ... SPRN_IBAT7L:
531 case SPRN_DBAT0U ... SPRN_DBAT3L:
532 case SPRN_DBAT4U ... SPRN_DBAT7L:
534 struct kvmppc_bat *bat = kvmppc_find_bat(vcpu, sprn);
537 *spr_val = bat->raw >> 32;
544 if (!spr_allowed(vcpu, PRIV_HYPER))
546 *spr_val = to_book3s(vcpu)->sdr1;
549 *spr_val = kvmppc_get_dsisr(vcpu);
552 *spr_val = kvmppc_get_dar(vcpu);
555 *spr_val = to_book3s(vcpu)->hior;
558 *spr_val = to_book3s(vcpu)->hid[0];
561 *spr_val = to_book3s(vcpu)->hid[1];
564 case SPRN_HID2_GEKKO:
565 *spr_val = to_book3s(vcpu)->hid[2];
568 case SPRN_HID4_GEKKO:
569 *spr_val = to_book3s(vcpu)->hid[4];
572 *spr_val = to_book3s(vcpu)->hid[5];
580 * On exit we would have updated purr
582 *spr_val = vcpu->arch.purr;
586 * On exit we would have updated spurr
588 *spr_val = vcpu->arch.spurr;
591 *spr_val = to_book3s(vcpu)->vtb;
594 *spr_val = vcpu->arch.ic;
604 *spr_val = to_book3s(vcpu)->gqr[sprn - SPRN_GQR0];
606 #ifdef CONFIG_PPC_BOOK3S_64
608 *spr_val = vcpu->arch.fscr;
611 *spr_val = vcpu->arch.bescr;
614 *spr_val = vcpu->arch.ebbhr;
617 *spr_val = vcpu->arch.ebbrr;
619 #ifdef CONFIG_PPC_TRANSACTIONAL_MEM
621 *spr_val = vcpu->arch.tfhar;
624 *spr_val = vcpu->arch.texasr;
627 *spr_val = vcpu->arch.tfiar;
637 case SPRN_MMCR0_GEKKO:
638 case SPRN_MMCR1_GEKKO:
639 case SPRN_PMC1_GEKKO:
640 case SPRN_PMC2_GEKKO:
641 case SPRN_PMC3_GEKKO:
642 case SPRN_PMC4_GEKKO:
643 case SPRN_WPAR_GEKKO:
646 #ifdef CONFIG_PPC_BOOK3S_64
659 pr_info_ratelimited("KVM: invalid SPR read: %d\n", sprn);
661 if (kvmppc_get_msr(vcpu) & MSR_PR) {
662 kvmppc_core_queue_program(vcpu, SRR1_PROGPRIV);
663 emulated = EMULATE_AGAIN;
666 if ((kvmppc_get_msr(vcpu) & MSR_PR) || sprn == 0 ||
667 sprn == 4 || sprn == 5 || sprn == 6) {
668 kvmppc_core_queue_program(vcpu, SRR1_PROGILL);
669 emulated = EMULATE_AGAIN;
679 u32 kvmppc_alignment_dsisr(struct kvm_vcpu *vcpu, unsigned int inst)
681 return make_dsisr(inst);
684 ulong kvmppc_alignment_dar(struct kvm_vcpu *vcpu, unsigned int inst)
686 #ifdef CONFIG_PPC_BOOK3S_64
688 * Linux's fix_alignment() assumes that DAR is valid, so can we
690 return vcpu->arch.fault_dar;
693 ulong ra = get_ra(inst);
694 ulong rb = get_rb(inst);
696 switch (get_op(inst)) {
702 dar = kvmppc_get_gpr(vcpu, ra);
703 dar += (s32)((s16)inst);
707 dar = kvmppc_get_gpr(vcpu, ra);
708 dar += kvmppc_get_gpr(vcpu, rb);
711 printk(KERN_INFO "KVM: Unaligned instruction 0x%x\n", inst);