1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2023 Jordan Niethe, IBM Corp. <jniethe5@gmail.com>
6 * Jordan Niethe <jniethe5@gmail.com>
8 * Description: KVM functions specific to running on Book 3S
9 * processors as a NESTEDv2 guest.
13 #include "linux/blk-mq.h"
14 #include "linux/console.h"
15 #include "linux/gfp_types.h"
16 #include "linux/signal.h"
17 #include <linux/kernel.h>
18 #include <linux/kvm_host.h>
19 #include <linux/pgtable.h>
21 #include <asm/kvm_ppc.h>
22 #include <asm/kvm_book3s.h>
23 #include <asm/hvcall.h>
24 #include <asm/pgalloc.h>
26 #include <asm/plpar_wrappers.h>
27 #include <asm/guest-state-buffer.h>
30 struct static_key_false __kvmhv_is_nestedv2 __read_mostly;
31 EXPORT_SYMBOL_GPL(__kvmhv_is_nestedv2);
35 gs_msg_ops_kvmhv_nestedv2_config_get_size(struct kvmppc_gs_msg *gsm)
38 KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE,
39 KVMPPC_GSID_RUN_INPUT,
40 KVMPPC_GSID_RUN_OUTPUT,
45 for (int i = 0; i < ARRAY_SIZE(ids); i++)
46 size += kvmppc_gse_total_size(kvmppc_gsid_size(ids[i]));
51 gs_msg_ops_kvmhv_nestedv2_config_fill_info(struct kvmppc_gs_buff *gsb,
52 struct kvmppc_gs_msg *gsm)
54 struct kvmhv_nestedv2_config *cfg;
59 if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE)) {
60 rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE,
61 cfg->vcpu_run_output_size);
66 if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_INPUT)) {
67 rc = kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_INPUT,
68 cfg->vcpu_run_input_cfg);
73 if (kvmppc_gsm_includes(gsm, KVMPPC_GSID_RUN_OUTPUT)) {
74 kvmppc_gse_put_buff_info(gsb, KVMPPC_GSID_RUN_OUTPUT,
75 cfg->vcpu_run_output_cfg);
84 gs_msg_ops_kvmhv_nestedv2_config_refresh_info(struct kvmppc_gs_msg *gsm,
85 struct kvmppc_gs_buff *gsb)
87 struct kvmhv_nestedv2_config *cfg;
88 struct kvmppc_gs_parser gsp = { 0 };
89 struct kvmppc_gs_elem *gse;
94 rc = kvmppc_gse_parse(&gsp, gsb);
98 gse = kvmppc_gsp_lookup(&gsp, KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE);
100 cfg->vcpu_run_output_size = kvmppc_gse_get_u64(gse);
104 static struct kvmppc_gs_msg_ops config_msg_ops = {
105 .get_size = gs_msg_ops_kvmhv_nestedv2_config_get_size,
106 .fill_info = gs_msg_ops_kvmhv_nestedv2_config_fill_info,
107 .refresh_info = gs_msg_ops_kvmhv_nestedv2_config_refresh_info,
110 static size_t gs_msg_ops_vcpu_get_size(struct kvmppc_gs_msg *gsm)
112 struct kvmppc_gs_bitmap gsbm = { 0 };
116 kvmppc_gsbm_fill(&gsbm);
117 kvmppc_gsbm_for_each(&gsbm, iden)
120 case KVMPPC_GSID_HOST_STATE_SIZE:
121 case KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE:
122 case KVMPPC_GSID_PARTITION_TABLE:
123 case KVMPPC_GSID_PROCESS_TABLE:
124 case KVMPPC_GSID_RUN_INPUT:
125 case KVMPPC_GSID_RUN_OUTPUT:
128 size += kvmppc_gse_total_size(kvmppc_gsid_size(iden));
134 static int gs_msg_ops_vcpu_fill_info(struct kvmppc_gs_buff *gsb,
135 struct kvmppc_gs_msg *gsm)
137 struct kvm_vcpu *vcpu;
145 kvmppc_gsm_for_each(gsm, iden)
149 if ((gsm->flags & KVMPPC_GS_FLAGS_WIDE) !=
150 (kvmppc_gsid_flags(iden) & KVMPPC_GS_FLAGS_WIDE))
154 case KVMPPC_GSID_DSCR:
155 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dscr);
157 case KVMPPC_GSID_MMCRA:
158 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.mmcra);
160 case KVMPPC_GSID_HFSCR:
161 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.hfscr);
163 case KVMPPC_GSID_PURR:
164 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.purr);
166 case KVMPPC_GSID_SPURR:
167 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.spurr);
169 case KVMPPC_GSID_AMR:
170 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.amr);
172 case KVMPPC_GSID_UAMOR:
173 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.uamor);
175 case KVMPPC_GSID_SIAR:
176 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.siar);
178 case KVMPPC_GSID_SDAR:
179 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.sdar);
181 case KVMPPC_GSID_IAMR:
182 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.iamr);
184 case KVMPPC_GSID_DAWR0:
185 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dawr0);
187 case KVMPPC_GSID_DAWR1:
188 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.dawr1);
190 case KVMPPC_GSID_DAWRX0:
191 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx0);
193 case KVMPPC_GSID_DAWRX1:
194 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.dawrx1);
196 case KVMPPC_GSID_CIABR:
197 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ciabr);
199 case KVMPPC_GSID_WORT:
200 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.wort);
202 case KVMPPC_GSID_PPR:
203 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ppr);
205 case KVMPPC_GSID_PSPB:
206 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pspb);
208 case KVMPPC_GSID_TAR:
209 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.tar);
211 case KVMPPC_GSID_FSCR:
212 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.fscr);
214 case KVMPPC_GSID_EBBHR:
215 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ebbhr);
217 case KVMPPC_GSID_EBBRR:
218 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ebbrr);
220 case KVMPPC_GSID_BESCR:
221 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.bescr);
224 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ic);
226 case KVMPPC_GSID_CTRL:
227 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.ctrl);
229 case KVMPPC_GSID_PIDR:
230 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pid);
232 case KVMPPC_GSID_AMOR: {
235 rc = kvmppc_gse_put_u64(gsb, iden, amor);
238 case KVMPPC_GSID_VRSAVE:
239 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.vrsave);
241 case KVMPPC_GSID_MMCR(0)... KVMPPC_GSID_MMCR(3):
242 i = iden - KVMPPC_GSID_MMCR(0);
243 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.mmcr[i]);
245 case KVMPPC_GSID_SIER(0)... KVMPPC_GSID_SIER(2):
246 i = iden - KVMPPC_GSID_SIER(0);
247 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.sier[i]);
249 case KVMPPC_GSID_PMC(0)... KVMPPC_GSID_PMC(5):
250 i = iden - KVMPPC_GSID_PMC(0);
251 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.pmc[i]);
253 case KVMPPC_GSID_GPR(0)... KVMPPC_GSID_GPR(31):
254 i = iden - KVMPPC_GSID_GPR(0);
255 rc = kvmppc_gse_put_u64(gsb, iden,
256 vcpu->arch.regs.gpr[i]);
259 rc = kvmppc_gse_put_u32(gsb, iden, vcpu->arch.regs.ccr);
261 case KVMPPC_GSID_XER:
262 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.xer);
264 case KVMPPC_GSID_CTR:
265 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.ctr);
268 rc = kvmppc_gse_put_u64(gsb, iden,
269 vcpu->arch.regs.link);
271 case KVMPPC_GSID_NIA:
272 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.regs.nip);
274 case KVMPPC_GSID_SRR0:
275 rc = kvmppc_gse_put_u64(gsb, iden,
276 vcpu->arch.shregs.srr0);
278 case KVMPPC_GSID_SRR1:
279 rc = kvmppc_gse_put_u64(gsb, iden,
280 vcpu->arch.shregs.srr1);
282 case KVMPPC_GSID_SPRG0:
283 rc = kvmppc_gse_put_u64(gsb, iden,
284 vcpu->arch.shregs.sprg0);
286 case KVMPPC_GSID_SPRG1:
287 rc = kvmppc_gse_put_u64(gsb, iden,
288 vcpu->arch.shregs.sprg1);
290 case KVMPPC_GSID_SPRG2:
291 rc = kvmppc_gse_put_u64(gsb, iden,
292 vcpu->arch.shregs.sprg2);
294 case KVMPPC_GSID_SPRG3:
295 rc = kvmppc_gse_put_u64(gsb, iden,
296 vcpu->arch.shregs.sprg3);
298 case KVMPPC_GSID_DAR:
299 rc = kvmppc_gse_put_u64(gsb, iden,
300 vcpu->arch.shregs.dar);
302 case KVMPPC_GSID_DSISR:
303 rc = kvmppc_gse_put_u32(gsb, iden,
304 vcpu->arch.shregs.dsisr);
306 case KVMPPC_GSID_MSR:
307 rc = kvmppc_gse_put_u64(gsb, iden,
308 vcpu->arch.shregs.msr);
310 case KVMPPC_GSID_VTB:
311 rc = kvmppc_gse_put_u64(gsb, iden,
312 vcpu->arch.vcore->vtb);
314 case KVMPPC_GSID_LPCR:
315 rc = kvmppc_gse_put_u64(gsb, iden,
316 vcpu->arch.vcore->lpcr);
318 case KVMPPC_GSID_TB_OFFSET:
319 rc = kvmppc_gse_put_u64(gsb, iden,
320 vcpu->arch.vcore->tb_offset);
322 case KVMPPC_GSID_FPSCR:
323 rc = kvmppc_gse_put_u64(gsb, iden, vcpu->arch.fp.fpscr);
325 case KVMPPC_GSID_VSRS(0)... KVMPPC_GSID_VSRS(31):
326 i = iden - KVMPPC_GSID_VSRS(0);
327 memcpy(&v, &vcpu->arch.fp.fpr[i],
328 sizeof(vcpu->arch.fp.fpr[i]));
329 rc = kvmppc_gse_put_vector128(gsb, iden, &v);
332 case KVMPPC_GSID_VSCR:
333 rc = kvmppc_gse_put_u32(gsb, iden,
334 vcpu->arch.vr.vscr.u[3]);
336 case KVMPPC_GSID_VSRS(32)... KVMPPC_GSID_VSRS(63):
337 i = iden - KVMPPC_GSID_VSRS(32);
338 rc = kvmppc_gse_put_vector128(gsb, iden,
339 &vcpu->arch.vr.vr[i]);
342 case KVMPPC_GSID_DEC_EXPIRY_TB: {
345 dw = vcpu->arch.dec_expires -
346 vcpu->arch.vcore->tb_offset;
347 rc = kvmppc_gse_put_u64(gsb, iden, dw);
350 case KVMPPC_GSID_LOGICAL_PVR:
352 * Though 'arch_compat == 0' would mean the default
353 * compatibility, arch_compat, being a Guest Wide
354 * Element, cannot be filled with a value of 0 in GSB
355 * as this would result into a kernel trap.
356 * Hence, when `arch_compat == 0`, arch_compat should
357 * default to L1's PVR.
359 if (!vcpu->arch.vcore->arch_compat) {
360 if (cpu_has_feature(CPU_FTR_ARCH_31))
361 arch_compat = PVR_ARCH_31;
362 else if (cpu_has_feature(CPU_FTR_ARCH_300))
363 arch_compat = PVR_ARCH_300;
365 arch_compat = vcpu->arch.vcore->arch_compat;
367 rc = kvmppc_gse_put_u32(gsb, iden, arch_compat);
378 static int gs_msg_ops_vcpu_refresh_info(struct kvmppc_gs_msg *gsm,
379 struct kvmppc_gs_buff *gsb)
381 struct kvmppc_gs_parser gsp = { 0 };
382 struct kvmhv_nestedv2_io *io;
383 struct kvmppc_gs_bitmap *valids;
384 struct kvm_vcpu *vcpu;
385 struct kvmppc_gs_elem *gse;
392 rc = kvmppc_gse_parse(&gsp, gsb);
396 io = &vcpu->arch.nestedv2_io;
397 valids = &io->valids;
399 kvmppc_gsp_for_each(&gsp, iden, gse)
402 case KVMPPC_GSID_DSCR:
403 vcpu->arch.dscr = kvmppc_gse_get_u64(gse);
405 case KVMPPC_GSID_MMCRA:
406 vcpu->arch.mmcra = kvmppc_gse_get_u64(gse);
408 case KVMPPC_GSID_HFSCR:
409 vcpu->arch.hfscr = kvmppc_gse_get_u64(gse);
411 case KVMPPC_GSID_PURR:
412 vcpu->arch.purr = kvmppc_gse_get_u64(gse);
414 case KVMPPC_GSID_SPURR:
415 vcpu->arch.spurr = kvmppc_gse_get_u64(gse);
417 case KVMPPC_GSID_AMR:
418 vcpu->arch.amr = kvmppc_gse_get_u64(gse);
420 case KVMPPC_GSID_UAMOR:
421 vcpu->arch.uamor = kvmppc_gse_get_u64(gse);
423 case KVMPPC_GSID_SIAR:
424 vcpu->arch.siar = kvmppc_gse_get_u64(gse);
426 case KVMPPC_GSID_SDAR:
427 vcpu->arch.sdar = kvmppc_gse_get_u64(gse);
429 case KVMPPC_GSID_IAMR:
430 vcpu->arch.iamr = kvmppc_gse_get_u64(gse);
432 case KVMPPC_GSID_DAWR0:
433 vcpu->arch.dawr0 = kvmppc_gse_get_u64(gse);
435 case KVMPPC_GSID_DAWR1:
436 vcpu->arch.dawr1 = kvmppc_gse_get_u64(gse);
438 case KVMPPC_GSID_DAWRX0:
439 vcpu->arch.dawrx0 = kvmppc_gse_get_u32(gse);
441 case KVMPPC_GSID_DAWRX1:
442 vcpu->arch.dawrx1 = kvmppc_gse_get_u32(gse);
444 case KVMPPC_GSID_CIABR:
445 vcpu->arch.ciabr = kvmppc_gse_get_u64(gse);
447 case KVMPPC_GSID_WORT:
448 vcpu->arch.wort = kvmppc_gse_get_u32(gse);
450 case KVMPPC_GSID_PPR:
451 vcpu->arch.ppr = kvmppc_gse_get_u64(gse);
453 case KVMPPC_GSID_PSPB:
454 vcpu->arch.pspb = kvmppc_gse_get_u32(gse);
456 case KVMPPC_GSID_TAR:
457 vcpu->arch.tar = kvmppc_gse_get_u64(gse);
459 case KVMPPC_GSID_FSCR:
460 vcpu->arch.fscr = kvmppc_gse_get_u64(gse);
462 case KVMPPC_GSID_EBBHR:
463 vcpu->arch.ebbhr = kvmppc_gse_get_u64(gse);
465 case KVMPPC_GSID_EBBRR:
466 vcpu->arch.ebbrr = kvmppc_gse_get_u64(gse);
468 case KVMPPC_GSID_BESCR:
469 vcpu->arch.bescr = kvmppc_gse_get_u64(gse);
472 vcpu->arch.ic = kvmppc_gse_get_u64(gse);
474 case KVMPPC_GSID_CTRL:
475 vcpu->arch.ctrl = kvmppc_gse_get_u64(gse);
477 case KVMPPC_GSID_PIDR:
478 vcpu->arch.pid = kvmppc_gse_get_u32(gse);
480 case KVMPPC_GSID_AMOR:
482 case KVMPPC_GSID_VRSAVE:
483 vcpu->arch.vrsave = kvmppc_gse_get_u32(gse);
485 case KVMPPC_GSID_MMCR(0)... KVMPPC_GSID_MMCR(3):
486 i = iden - KVMPPC_GSID_MMCR(0);
487 vcpu->arch.mmcr[i] = kvmppc_gse_get_u64(gse);
489 case KVMPPC_GSID_SIER(0)... KVMPPC_GSID_SIER(2):
490 i = iden - KVMPPC_GSID_SIER(0);
491 vcpu->arch.sier[i] = kvmppc_gse_get_u64(gse);
493 case KVMPPC_GSID_PMC(0)... KVMPPC_GSID_PMC(5):
494 i = iden - KVMPPC_GSID_PMC(0);
495 vcpu->arch.pmc[i] = kvmppc_gse_get_u32(gse);
497 case KVMPPC_GSID_GPR(0)... KVMPPC_GSID_GPR(31):
498 i = iden - KVMPPC_GSID_GPR(0);
499 vcpu->arch.regs.gpr[i] = kvmppc_gse_get_u64(gse);
502 vcpu->arch.regs.ccr = kvmppc_gse_get_u32(gse);
504 case KVMPPC_GSID_XER:
505 vcpu->arch.regs.xer = kvmppc_gse_get_u64(gse);
507 case KVMPPC_GSID_CTR:
508 vcpu->arch.regs.ctr = kvmppc_gse_get_u64(gse);
511 vcpu->arch.regs.link = kvmppc_gse_get_u64(gse);
513 case KVMPPC_GSID_NIA:
514 vcpu->arch.regs.nip = kvmppc_gse_get_u64(gse);
516 case KVMPPC_GSID_SRR0:
517 vcpu->arch.shregs.srr0 = kvmppc_gse_get_u64(gse);
519 case KVMPPC_GSID_SRR1:
520 vcpu->arch.shregs.srr1 = kvmppc_gse_get_u64(gse);
522 case KVMPPC_GSID_SPRG0:
523 vcpu->arch.shregs.sprg0 = kvmppc_gse_get_u64(gse);
525 case KVMPPC_GSID_SPRG1:
526 vcpu->arch.shregs.sprg1 = kvmppc_gse_get_u64(gse);
528 case KVMPPC_GSID_SPRG2:
529 vcpu->arch.shregs.sprg2 = kvmppc_gse_get_u64(gse);
531 case KVMPPC_GSID_SPRG3:
532 vcpu->arch.shregs.sprg3 = kvmppc_gse_get_u64(gse);
534 case KVMPPC_GSID_DAR:
535 vcpu->arch.shregs.dar = kvmppc_gse_get_u64(gse);
537 case KVMPPC_GSID_DSISR:
538 vcpu->arch.shregs.dsisr = kvmppc_gse_get_u32(gse);
540 case KVMPPC_GSID_MSR:
541 vcpu->arch.shregs.msr = kvmppc_gse_get_u64(gse);
543 case KVMPPC_GSID_VTB:
544 vcpu->arch.vcore->vtb = kvmppc_gse_get_u64(gse);
546 case KVMPPC_GSID_LPCR:
547 vcpu->arch.vcore->lpcr = kvmppc_gse_get_u64(gse);
549 case KVMPPC_GSID_TB_OFFSET:
550 vcpu->arch.vcore->tb_offset = kvmppc_gse_get_u64(gse);
552 case KVMPPC_GSID_FPSCR:
553 vcpu->arch.fp.fpscr = kvmppc_gse_get_u64(gse);
555 case KVMPPC_GSID_VSRS(0)... KVMPPC_GSID_VSRS(31):
556 kvmppc_gse_get_vector128(gse, &v);
557 i = iden - KVMPPC_GSID_VSRS(0);
558 memcpy(&vcpu->arch.fp.fpr[i], &v,
559 sizeof(vcpu->arch.fp.fpr[i]));
562 case KVMPPC_GSID_VSCR:
563 vcpu->arch.vr.vscr.u[3] = kvmppc_gse_get_u32(gse);
565 case KVMPPC_GSID_VSRS(32)... KVMPPC_GSID_VSRS(63):
566 i = iden - KVMPPC_GSID_VSRS(32);
567 kvmppc_gse_get_vector128(gse, &vcpu->arch.vr.vr[i]);
570 case KVMPPC_GSID_HDAR:
571 vcpu->arch.fault_dar = kvmppc_gse_get_u64(gse);
573 case KVMPPC_GSID_HDSISR:
574 vcpu->arch.fault_dsisr = kvmppc_gse_get_u32(gse);
576 case KVMPPC_GSID_ASDR:
577 vcpu->arch.fault_gpa = kvmppc_gse_get_u64(gse);
579 case KVMPPC_GSID_HEIR:
580 vcpu->arch.emul_inst = kvmppc_gse_get_u64(gse);
582 case KVMPPC_GSID_DEC_EXPIRY_TB: {
585 dw = kvmppc_gse_get_u64(gse);
586 vcpu->arch.dec_expires =
587 dw + vcpu->arch.vcore->tb_offset;
590 case KVMPPC_GSID_LOGICAL_PVR:
591 vcpu->arch.vcore->arch_compat = kvmppc_gse_get_u32(gse);
596 kvmppc_gsbm_set(valids, iden);
602 static struct kvmppc_gs_msg_ops vcpu_message_ops = {
603 .get_size = gs_msg_ops_vcpu_get_size,
604 .fill_info = gs_msg_ops_vcpu_fill_info,
605 .refresh_info = gs_msg_ops_vcpu_refresh_info,
608 static int kvmhv_nestedv2_host_create(struct kvm_vcpu *vcpu,
609 struct kvmhv_nestedv2_io *io)
611 struct kvmhv_nestedv2_config *cfg;
612 struct kvmppc_gs_buff *gsb, *vcpu_run_output, *vcpu_run_input;
613 unsigned long guest_id, vcpu_id;
614 struct kvmppc_gs_msg *gsm, *vcpu_message, *vcore_message;
618 guest_id = vcpu->kvm->arch.lpid;
619 vcpu_id = vcpu->vcpu_id;
621 gsm = kvmppc_gsm_new(&config_msg_ops, cfg, KVMPPC_GS_FLAGS_WIDE,
628 gsb = kvmppc_gsb_new(kvmppc_gsm_size(gsm), guest_id, vcpu_id,
635 rc = kvmppc_gsb_receive_datum(gsb, gsm,
636 KVMPPC_GSID_RUN_OUTPUT_MIN_SIZE);
638 pr_err("KVM-NESTEDv2: couldn't get vcpu run output buffer minimum size\n");
642 vcpu_run_output = kvmppc_gsb_new(cfg->vcpu_run_output_size, guest_id,
643 vcpu_id, GFP_KERNEL);
644 if (!vcpu_run_output) {
649 cfg->vcpu_run_output_cfg.address = kvmppc_gsb_paddress(vcpu_run_output);
650 cfg->vcpu_run_output_cfg.size = kvmppc_gsb_capacity(vcpu_run_output);
651 io->vcpu_run_output = vcpu_run_output;
654 rc = kvmppc_gsb_send_datum(gsb, gsm, KVMPPC_GSID_RUN_OUTPUT);
656 pr_err("KVM-NESTEDv2: couldn't set vcpu run output buffer\n");
660 vcpu_message = kvmppc_gsm_new(&vcpu_message_ops, vcpu, 0, GFP_KERNEL);
665 kvmppc_gsm_include_all(vcpu_message);
667 io->vcpu_message = vcpu_message;
669 vcpu_run_input = kvmppc_gsb_new(kvmppc_gsm_size(vcpu_message), guest_id,
670 vcpu_id, GFP_KERNEL);
671 if (!vcpu_run_input) {
673 goto free_vcpu_message;
676 io->vcpu_run_input = vcpu_run_input;
677 cfg->vcpu_run_input_cfg.address = kvmppc_gsb_paddress(vcpu_run_input);
678 cfg->vcpu_run_input_cfg.size = kvmppc_gsb_capacity(vcpu_run_input);
679 rc = kvmppc_gsb_send_datum(gsb, gsm, KVMPPC_GSID_RUN_INPUT);
681 pr_err("KVM-NESTEDv2: couldn't set vcpu run input buffer\n");
682 goto free_vcpu_run_input;
685 vcore_message = kvmppc_gsm_new(&vcpu_message_ops, vcpu,
686 KVMPPC_GS_FLAGS_WIDE, GFP_KERNEL);
687 if (!vcore_message) {
689 goto free_vcpu_run_input;
692 kvmppc_gsm_include_all(vcore_message);
693 kvmppc_gsbm_clear(&vcore_message->bitmap, KVMPPC_GSID_LOGICAL_PVR);
694 io->vcore_message = vcore_message;
696 kvmppc_gsbm_fill(&io->valids);
697 kvmppc_gsm_free(gsm);
698 kvmppc_gsb_free(gsb);
702 kvmppc_gsb_free(vcpu_run_input);
704 kvmppc_gsm_free(vcpu_message);
706 kvmppc_gsb_free(vcpu_run_output);
708 kvmppc_gsb_free(gsb);
710 kvmppc_gsm_free(gsm);
716 * __kvmhv_nestedv2_mark_dirty() - mark a Guest State ID to be sent to the host
718 * @iden: guest state ID
720 * Mark a guest state ID as having been changed by the L1 host and thus
721 * the new value must be sent to the L0 hypervisor. See kvmhv_nestedv2_flush_vcpu()
723 int __kvmhv_nestedv2_mark_dirty(struct kvm_vcpu *vcpu, u16 iden)
725 struct kvmhv_nestedv2_io *io;
726 struct kvmppc_gs_bitmap *valids;
727 struct kvmppc_gs_msg *gsm;
732 io = &vcpu->arch.nestedv2_io;
733 valids = &io->valids;
734 gsm = io->vcpu_message;
735 kvmppc_gsm_include(gsm, iden);
736 gsm = io->vcore_message;
737 kvmppc_gsm_include(gsm, iden);
738 kvmppc_gsbm_set(valids, iden);
741 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_mark_dirty);
744 * __kvmhv_nestedv2_cached_reload() - reload a Guest State ID from the host
746 * @iden: guest state ID
748 * Reload the value for the guest state ID from the L0 host into the L1 host.
749 * This is cached so that going out to the L0 host only happens if necessary.
751 int __kvmhv_nestedv2_cached_reload(struct kvm_vcpu *vcpu, u16 iden)
753 struct kvmhv_nestedv2_io *io;
754 struct kvmppc_gs_bitmap *valids;
755 struct kvmppc_gs_buff *gsb;
756 struct kvmppc_gs_msg gsm;
762 io = &vcpu->arch.nestedv2_io;
763 valids = &io->valids;
764 if (kvmppc_gsbm_test(valids, iden))
767 gsb = io->vcpu_run_input;
768 kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, kvmppc_gsid_flags(iden));
769 rc = kvmppc_gsb_receive_datum(gsb, &gsm, iden);
771 pr_err("KVM-NESTEDv2: couldn't get GSID: 0x%x\n", iden);
776 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_cached_reload);
779 * kvmhv_nestedv2_flush_vcpu() - send modified Guest State IDs to the host
781 * @time_limit: hdec expiry tb
783 * Send the values marked by __kvmhv_nestedv2_mark_dirty() to the L0 host.
784 * Thread wide values are copied to the H_GUEST_RUN_VCPU input buffer. Guest
785 * wide values need to be sent with H_GUEST_SET first.
787 * The hdec tb offset is always sent to L0 host.
789 int kvmhv_nestedv2_flush_vcpu(struct kvm_vcpu *vcpu, u64 time_limit)
791 struct kvmhv_nestedv2_io *io;
792 struct kvmppc_gs_buff *gsb;
793 struct kvmppc_gs_msg *gsm;
796 io = &vcpu->arch.nestedv2_io;
797 gsb = io->vcpu_run_input;
798 gsm = io->vcore_message;
799 rc = kvmppc_gsb_send_data(gsb, gsm);
801 pr_err("KVM-NESTEDv2: couldn't set guest wide elements\n");
805 gsm = io->vcpu_message;
806 kvmppc_gsb_reset(gsb);
807 rc = kvmppc_gsm_fill_info(gsm, gsb);
809 pr_err("KVM-NESTEDv2: couldn't fill vcpu run input buffer\n");
813 rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_HDEC_EXPIRY_TB, time_limit);
818 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_flush_vcpu);
821 * kvmhv_nestedv2_set_ptbl_entry() - send partition and process table state to
824 * @dw0: partition table double word
825 * @dw1: process table double word
827 int kvmhv_nestedv2_set_ptbl_entry(unsigned long lpid, u64 dw0, u64 dw1)
829 struct kvmppc_gs_part_table patbl;
830 struct kvmppc_gs_proc_table prtbl;
831 struct kvmppc_gs_buff *gsb;
835 size = kvmppc_gse_total_size(
836 kvmppc_gsid_size(KVMPPC_GSID_PARTITION_TABLE)) +
837 kvmppc_gse_total_size(
838 kvmppc_gsid_size(KVMPPC_GSID_PROCESS_TABLE)) +
839 sizeof(struct kvmppc_gs_header);
840 gsb = kvmppc_gsb_new(size, lpid, 0, GFP_KERNEL);
844 patbl.address = dw0 & RPDB_MASK;
845 patbl.ea_bits = ((((dw0 & RTS1_MASK) >> (RTS1_SHIFT - 3)) |
846 ((dw0 & RTS2_MASK) >> RTS2_SHIFT)) +
848 patbl.gpd_size = 1ul << ((dw0 & RPDS_MASK) + 3);
849 rc = kvmppc_gse_put_part_table(gsb, KVMPPC_GSID_PARTITION_TABLE, patbl);
853 prtbl.address = dw1 & PRTB_MASK;
854 prtbl.gpd_size = 1ul << ((dw1 & PRTS_MASK) + 12);
855 rc = kvmppc_gse_put_proc_table(gsb, KVMPPC_GSID_PROCESS_TABLE, prtbl);
859 rc = kvmppc_gsb_send(gsb, KVMPPC_GS_FLAGS_WIDE);
861 pr_err("KVM-NESTEDv2: couldn't set the PATE\n");
865 kvmppc_gsb_free(gsb);
869 kvmppc_gsb_free(gsb);
872 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_set_ptbl_entry);
875 * kvmhv_nestedv2_set_vpa() - register L2 VPA with L0
877 * @vpa: L1 logical real address
879 int kvmhv_nestedv2_set_vpa(struct kvm_vcpu *vcpu, unsigned long vpa)
881 struct kvmhv_nestedv2_io *io;
882 struct kvmppc_gs_buff *gsb;
885 io = &vcpu->arch.nestedv2_io;
886 gsb = io->vcpu_run_input;
888 kvmppc_gsb_reset(gsb);
889 rc = kvmppc_gse_put_u64(gsb, KVMPPC_GSID_VPA, vpa);
893 rc = kvmppc_gsb_send(gsb, 0);
895 pr_err("KVM-NESTEDv2: couldn't register the L2 VPA (rc=%d)\n", rc);
898 kvmppc_gsb_reset(gsb);
901 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_set_vpa);
904 * kvmhv_nestedv2_parse_output() - receive values from H_GUEST_RUN_VCPU output
907 * Parse the output buffer from H_GUEST_RUN_VCPU to update vcpu.
909 int kvmhv_nestedv2_parse_output(struct kvm_vcpu *vcpu)
911 struct kvmhv_nestedv2_io *io;
912 struct kvmppc_gs_buff *gsb;
913 struct kvmppc_gs_msg gsm;
915 io = &vcpu->arch.nestedv2_io;
916 gsb = io->vcpu_run_output;
918 vcpu->arch.fault_dar = 0;
919 vcpu->arch.fault_dsisr = 0;
920 vcpu->arch.fault_gpa = 0;
921 vcpu->arch.emul_inst = KVM_INST_FETCH_FAILED;
923 kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, 0);
924 return kvmppc_gsm_refresh_info(&gsm, gsb);
926 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_parse_output);
928 static void kvmhv_nestedv2_host_free(struct kvm_vcpu *vcpu,
929 struct kvmhv_nestedv2_io *io)
931 kvmppc_gsm_free(io->vcpu_message);
932 kvmppc_gsm_free(io->vcore_message);
933 kvmppc_gsb_free(io->vcpu_run_input);
934 kvmppc_gsb_free(io->vcpu_run_output);
937 int __kvmhv_nestedv2_reload_ptregs(struct kvm_vcpu *vcpu, struct pt_regs *regs)
939 struct kvmhv_nestedv2_io *io;
940 struct kvmppc_gs_bitmap *valids;
941 struct kvmppc_gs_buff *gsb;
942 struct kvmppc_gs_msg gsm;
946 io = &vcpu->arch.nestedv2_io;
947 valids = &io->valids;
949 gsb = io->vcpu_run_input;
950 kvmppc_gsm_init(&gsm, &vcpu_message_ops, vcpu, 0);
952 for (int i = 0; i < 32; i++) {
953 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_GPR(i)))
954 kvmppc_gsm_include(&gsm, KVMPPC_GSID_GPR(i));
957 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_CR))
958 kvmppc_gsm_include(&gsm, KVMPPC_GSID_CR);
960 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_XER))
961 kvmppc_gsm_include(&gsm, KVMPPC_GSID_XER);
963 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_CTR))
964 kvmppc_gsm_include(&gsm, KVMPPC_GSID_CTR);
966 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_LR))
967 kvmppc_gsm_include(&gsm, KVMPPC_GSID_LR);
969 if (!kvmppc_gsbm_test(valids, KVMPPC_GSID_NIA))
970 kvmppc_gsm_include(&gsm, KVMPPC_GSID_NIA);
972 rc = kvmppc_gsb_receive_data(gsb, &gsm);
974 pr_err("KVM-NESTEDv2: couldn't reload ptregs\n");
978 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_reload_ptregs);
980 int __kvmhv_nestedv2_mark_dirty_ptregs(struct kvm_vcpu *vcpu,
981 struct pt_regs *regs)
983 for (int i = 0; i < 32; i++)
984 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_GPR(i));
986 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_CR);
987 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_XER);
988 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_CTR);
989 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_LR);
990 kvmhv_nestedv2_mark_dirty(vcpu, KVMPPC_GSID_NIA);
994 EXPORT_SYMBOL_GPL(__kvmhv_nestedv2_mark_dirty_ptregs);
997 * kvmhv_nestedv2_vcpu_create() - create nested vcpu for the NESTEDv2 API
999 * @io: NESTEDv2 nested io state
1001 * Parse the output buffer from H_GUEST_RUN_VCPU to update vcpu.
1003 int kvmhv_nestedv2_vcpu_create(struct kvm_vcpu *vcpu,
1004 struct kvmhv_nestedv2_io *io)
1008 rc = plpar_guest_create_vcpu(0, vcpu->kvm->arch.lpid, vcpu->vcpu_id);
1010 if (rc != H_SUCCESS) {
1011 pr_err("KVM: Create Guest vcpu hcall failed, rc=%ld\n", rc);
1013 case H_NOT_ENOUGH_RESOURCES:
1023 rc = kvmhv_nestedv2_host_create(vcpu, io);
1027 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_vcpu_create);
1030 * kvmhv_nestedv2_vcpu_free() - free the NESTEDv2 state
1032 * @io: NESTEDv2 nested io state
1034 void kvmhv_nestedv2_vcpu_free(struct kvm_vcpu *vcpu,
1035 struct kvmhv_nestedv2_io *io)
1037 kvmhv_nestedv2_host_free(vcpu, io);
1039 EXPORT_SYMBOL_GPL(kvmhv_nestedv2_vcpu_free);