powerpc.c 30.8 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright IBM Corp. 2007
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
 */

#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
#include <linux/vmalloc.h>
A
Alexander Graf 已提交
25
#include <linux/hrtimer.h>
26
#include <linux/fs.h>
27
#include <linux/slab.h>
S
Scott Wood 已提交
28
#include <linux/file.h>
29
#include <linux/module.h>
30 31 32
#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
33
#include <asm/tlbflush.h>
34
#include <asm/cputhreads.h>
35
#include <asm/irqflags.h>
36
#include "timing.h"
37
#include "irq.h"
P
Paul Mackerras 已提交
38
#include "../mm/mmu_decl.h"
39

40 41 42
#define CREATE_TRACE_POINTS
#include "trace.h"

43 44 45 46 47
struct kvmppc_ops *kvmppc_hv_ops;
EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
struct kvmppc_ops *kvmppc_pr_ops;
EXPORT_SYMBOL_GPL(kvmppc_pr_ops);

48

49 50
int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
51
	return !!(v->arch.pending_exceptions) ||
52
	       v->requests;
53 54
}

55 56 57 58 59
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
	return 1;
}

60 61 62 63
/*
 * Common checks before entering the guest world.  Call with interrupts
 * disabled.
 *
64 65 66 67
 * returns:
 *
 * == 1 if we're ready to go into guest state
 * <= 0 if we need to go back to the host with return value
68 69 70
 */
int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
{
S
Scott Wood 已提交
71 72 73 74
	int r;

	WARN_ON(irqs_disabled());
	hard_irq_disable();
75 76 77 78 79

	while (true) {
		if (need_resched()) {
			local_irq_enable();
			cond_resched();
S
Scott Wood 已提交
80
			hard_irq_disable();
81 82 83 84
			continue;
		}

		if (signal_pending(current)) {
85 86 87
			kvmppc_account_exit(vcpu, SIGNAL_EXITS);
			vcpu->run->exit_reason = KVM_EXIT_INTR;
			r = -EINTR;
88 89 90
			break;
		}

91 92 93 94 95 96 97 98
		vcpu->mode = IN_GUEST_MODE;

		/*
		 * Reading vcpu->requests must happen after setting vcpu->mode,
		 * so we don't miss a request because the requester sees
		 * OUTSIDE_GUEST_MODE and assumes we'll be checking requests
		 * before next entering the guest (and thus doesn't IPI).
		 */
99
		smp_mb();
100

101 102 103 104
		if (vcpu->requests) {
			/* Make sure we process requests preemptable */
			local_irq_enable();
			trace_kvm_check_requests(vcpu);
105
			r = kvmppc_core_check_requests(vcpu);
S
Scott Wood 已提交
106
			hard_irq_disable();
107 108 109
			if (r > 0)
				continue;
			break;
110 111 112 113 114 115 116 117
		}

		if (kvmppc_core_prepare_to_enter(vcpu)) {
			/* interrupts got enabled in between, so we
			   are back at square 1 */
			continue;
		}

118
		__kvm_guest_enter();
S
Scott Wood 已提交
119
		return 1;
120 121
	}

S
Scott Wood 已提交
122 123
	/* return to host */
	local_irq_enable();
124 125
	return r;
}
126
EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
127

128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
static void kvmppc_swab_shared(struct kvm_vcpu *vcpu)
{
	struct kvm_vcpu_arch_shared *shared = vcpu->arch.shared;
	int i;

	shared->sprg0 = swab64(shared->sprg0);
	shared->sprg1 = swab64(shared->sprg1);
	shared->sprg2 = swab64(shared->sprg2);
	shared->sprg3 = swab64(shared->sprg3);
	shared->srr0 = swab64(shared->srr0);
	shared->srr1 = swab64(shared->srr1);
	shared->dar = swab64(shared->dar);
	shared->msr = swab64(shared->msr);
	shared->dsisr = swab32(shared->dsisr);
	shared->int_pending = swab32(shared->int_pending);
	for (i = 0; i < ARRAY_SIZE(shared->sr); i++)
		shared->sr[i] = swab32(shared->sr[i]);
}
#endif

149 150 151 152 153 154 155 156 157 158
int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
{
	int nr = kvmppc_get_gpr(vcpu, 11);
	int r;
	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	unsigned long r2 = 0;

159
	if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
160 161 162 163 164 165 166 167
		/* 32 bit mode */
		param1 &= 0xffffffff;
		param2 &= 0xffffffff;
		param3 &= 0xffffffff;
		param4 &= 0xffffffff;
	}

	switch (nr) {
168
	case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
169
	{
170 171 172 173 174 175 176 177 178 179
#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_KVM_BOOK3S_PR_POSSIBLE)
		/* Book3S can be little endian, find it out here */
		int shared_big_endian = true;
		if (vcpu->arch.intr_msr & MSR_LE)
			shared_big_endian = false;
		if (shared_big_endian != vcpu->arch.shared_big_endian)
			kvmppc_swab_shared(vcpu);
		vcpu->arch.shared_big_endian = shared_big_endian;
#endif

180 181 182 183 184 185 186 187 188 189 190 191
		if (!(param2 & MAGIC_PAGE_FLAG_NOT_MAPPED_NX)) {
			/*
			 * Older versions of the Linux magic page code had
			 * a bug where they would map their trampoline code
			 * NX. If that's the case, remove !PR NX capability.
			 */
			vcpu->arch.disable_kernel_nx = true;
			kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
		}

		vcpu->arch.magic_page_pa = param1 & ~0xfffULL;
		vcpu->arch.magic_page_ea = param2 & ~0xfffULL;
192

193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211
#ifdef CONFIG_PPC_64K_PAGES
		/*
		 * Make sure our 4k magic page is in the same window of a 64k
		 * page within the guest and within the host's page.
		 */
		if ((vcpu->arch.magic_page_pa & 0xf000) !=
		    ((ulong)vcpu->arch.shared & 0xf000)) {
			void *old_shared = vcpu->arch.shared;
			ulong shared = (ulong)vcpu->arch.shared;
			void *new_shared;

			shared &= PAGE_MASK;
			shared |= vcpu->arch.magic_page_pa & 0xf000;
			new_shared = (void*)shared;
			memcpy(new_shared, old_shared, 0x1000);
			vcpu->arch.shared = new_shared;
		}
#endif

212
		r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
213

214
		r = EV_SUCCESS;
215 216
		break;
	}
217 218
	case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
		r = EV_SUCCESS;
219
#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
220 221
		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
222 223 224

		/* Second return value is in r4 */
		break;
225 226 227 228 229
	case EV_HCALL_TOKEN(EV_IDLE):
		r = EV_SUCCESS;
		kvm_vcpu_block(vcpu);
		clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
		break;
230
	default:
231
		r = EV_UNIMPLEMENTED;
232 233 234
		break;
	}

235 236
	kvmppc_set_gpr(vcpu, 4, r2);

237 238
	return r;
}
239
EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
240

241 242 243 244 245 246 247 248 249 250 251 252 253
int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
{
	int r = false;

	/* We have to know what CPU to virtualize */
	if (!vcpu->arch.pvr)
		goto out;

	/* PAPR only works with book3s_64 */
	if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
		goto out;

	/* HV KVM can only do PAPR mode for now */
254
	if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
255 256
		goto out;

257 258 259 260 261
#ifdef CONFIG_KVM_BOOKE_HV
	if (!cpu_has_feature(CPU_FTR_EMB_HV))
		goto out;
#endif

262 263 264 265 266 267
	r = true;

out:
	vcpu->arch.sane = r;
	return r ? 0 : -EINVAL;
}
268
EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
269

270 271 272 273 274
int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
	enum emulation_result er;
	int r;

275
	er = kvmppc_emulate_loadstore(vcpu);
276 277 278 279 280 281
	switch (er) {
	case EMULATE_DONE:
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_GUEST_NV;
		break;
282 283 284
	case EMULATE_AGAIN:
		r = RESUME_GUEST;
		break;
285 286 287 288 289 290 291 292 293
	case EMULATE_DO_MMIO:
		run->exit_reason = KVM_EXIT_MMIO;
		/* We must reload nonvolatiles because "update" load/store
		 * instructions modify register state. */
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_HOST_NV;
		break;
	case EMULATE_FAIL:
294 295 296
	{
		u32 last_inst;

297
		kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
298
		/* XXX Deliver Program interrupt to guest. */
299
		pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
300 301
		r = RESUME_HOST;
		break;
302
	}
303
	default:
304 305
		WARN_ON(1);
		r = RESUME_GUEST;
306 307 308 309
	}

	return r;
}
310
EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
311

312 313 314
int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
	      bool data)
{
315
	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
316 317 318 319 320 321 322 323 324 325 326 327 328 329 330
	struct kvmppc_pte pte;
	int r;

	vcpu->stat.st++;

	r = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
			 XLATE_WRITE, &pte);
	if (r < 0)
		return r;

	*eaddr = pte.raddr;

	if (!pte.may_write)
		return -EPERM;

331 332 333 334 335 336 337 338 339 340
	/* Magic page override */
	if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
	    ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
	    !(kvmppc_get_msr(vcpu) & MSR_PR)) {
		void *magic = vcpu->arch.shared;
		magic += pte.eaddr & 0xfff;
		memcpy(magic, ptr, size);
		return EMULATE_DONE;
	}

341 342 343 344 345 346 347 348 349 350
	if (kvm_write_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;

	return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvmppc_st);

int kvmppc_ld(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
		      bool data)
{
351
	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369
	struct kvmppc_pte pte;
	int rc;

	vcpu->stat.ld++;

	rc = kvmppc_xlate(vcpu, *eaddr, data ? XLATE_DATA : XLATE_INST,
			  XLATE_READ, &pte);
	if (rc)
		return rc;

	*eaddr = pte.raddr;

	if (!pte.may_read)
		return -EPERM;

	if (!data && !pte.may_execute)
		return -ENOEXEC;

370 371 372 373 374 375 376 377 378 379
	/* Magic page override */
	if (kvmppc_supports_magic_page(vcpu) && mp_pa &&
	    ((pte.raddr & KVM_PAM & PAGE_MASK) == mp_pa) &&
	    !(kvmppc_get_msr(vcpu) & MSR_PR)) {
		void *magic = vcpu->arch.shared;
		magic += pte.eaddr & 0xfff;
		memcpy(ptr, magic, size);
		return EMULATE_DONE;
	}

380 381
	if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;
382 383 384 385 386

	return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvmppc_ld);

387
int kvm_arch_hardware_enable(void)
388
{
389
	return 0;
390 391 392 393 394 395 396 397 398
}

int kvm_arch_hardware_setup(void)
{
	return 0;
}

void kvm_arch_check_processor_compat(void *rtn)
{
399
	*(int *)rtn = kvmppc_core_check_processor_compat();
400 401
}

402
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
403
{
404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429
	struct kvmppc_ops *kvm_ops = NULL;
	/*
	 * if we have both HV and PR enabled, default is HV
	 */
	if (type == 0) {
		if (kvmppc_hv_ops)
			kvm_ops = kvmppc_hv_ops;
		else
			kvm_ops = kvmppc_pr_ops;
		if (!kvm_ops)
			goto err_out;
	} else	if (type == KVM_VM_PPC_HV) {
		if (!kvmppc_hv_ops)
			goto err_out;
		kvm_ops = kvmppc_hv_ops;
	} else if (type == KVM_VM_PPC_PR) {
		if (!kvmppc_pr_ops)
			goto err_out;
		kvm_ops = kvmppc_pr_ops;
	} else
		goto err_out;

	if (kvm_ops->owner && !try_module_get(kvm_ops->owner))
		return -ENOENT;

	kvm->arch.kvm_ops = kvm_ops;
430
	return kvmppc_core_init_vm(kvm);
431 432
err_out:
	return -EINVAL;
433 434
}

435
void kvm_arch_destroy_vm(struct kvm *kvm)
436 437
{
	unsigned int i;
438
	struct kvm_vcpu *vcpu;
439

440 441 442 443 444 445 446 447
	kvm_for_each_vcpu(i, vcpu, kvm)
		kvm_arch_vcpu_free(vcpu);

	mutex_lock(&kvm->lock);
	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
		kvm->vcpus[i] = NULL;

	atomic_set(&kvm->online_vcpus, 0);
448 449 450

	kvmppc_core_destroy_vm(kvm);

451
	mutex_unlock(&kvm->lock);
452 453 454

	/* drop the module reference */
	module_put(kvm->arch.kvm_ops->owner);
455 456
}

457
int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
458 459
{
	int r;
460
	/* Assume we're using HV mode when the HV module is loaded */
461
	int hv_enabled = kvmppc_hv_ops ? 1 : 0;
462

463 464 465 466 467 468 469 470
	if (kvm) {
		/*
		 * Hooray - we know which VM type we're running on. Depend on
		 * that rather than the guess above.
		 */
		hv_enabled = is_kvmppc_hv_enabled(kvm);
	}

471
	switch (ext) {
S
Scott Wood 已提交
472 473
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_SREGS:
474
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
475
	case KVM_CAP_PPC_EPR:
S
Scott Wood 已提交
476
#else
477
	case KVM_CAP_PPC_SEGSTATE:
478
	case KVM_CAP_PPC_HIOR:
479
	case KVM_CAP_PPC_PAPR:
S
Scott Wood 已提交
480
#endif
481
	case KVM_CAP_PPC_UNSET_IRQ:
482
	case KVM_CAP_PPC_IRQ_LEVEL:
483
	case KVM_CAP_ENABLE_CAP:
484
	case KVM_CAP_ENABLE_CAP_VM:
485
	case KVM_CAP_ONE_REG:
A
Alexander Graf 已提交
486
	case KVM_CAP_IOEVENTFD:
487
	case KVM_CAP_DEVICE_CTRL:
488 489 490
		r = 1;
		break;
	case KVM_CAP_PPC_PAIRED_SINGLES:
491
	case KVM_CAP_PPC_OSI:
492
	case KVM_CAP_PPC_GET_PVINFO:
493
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
494
	case KVM_CAP_SW_TLB:
S
Scott Wood 已提交
495
#endif
496
		/* We support this only for PR */
497
		r = !hv_enabled;
498
		break;
499
#ifdef CONFIG_KVM_MMIO
500 501 502
	case KVM_CAP_COALESCED_MMIO:
		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
		break;
503
#endif
504 505 506 507 508 509
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC:
		r = 1;
		break;
#endif

510
#ifdef CONFIG_PPC_BOOK3S_64
511
	case KVM_CAP_SPAPR_TCE:
512
	case KVM_CAP_PPC_ALLOC_HTAB:
513
	case KVM_CAP_PPC_RTAS:
514
	case KVM_CAP_PPC_FIXUP_HCALL:
515
	case KVM_CAP_PPC_ENABLE_HCALL:
516 517 518
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS:
#endif
519 520
		r = 1;
		break;
521
#endif /* CONFIG_PPC_BOOK3S_64 */
522
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
523
	case KVM_CAP_PPC_SMT:
524
		if (hv_enabled)
525
			r = threads_per_subcore;
526 527
		else
			r = 0;
528
		break;
529
	case KVM_CAP_PPC_RMA:
530
		r = 0;
531
		break;
532 533 534
	case KVM_CAP_PPC_HWRNG:
		r = kvmppc_hwrng_present();
		break;
535
#endif
536
	case KVM_CAP_SYNC_MMU:
537
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
538
		r = hv_enabled;
539 540 541 542
#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
		r = 1;
#else
		r = 0;
543
#endif
544 545
		break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
546
	case KVM_CAP_PPC_HTAB_FD:
547
		r = hv_enabled;
548
		break;
549
#endif
550 551 552 553 554 555 556
	case KVM_CAP_NR_VCPUS:
		/*
		 * Recommending a number of CPUs is somewhat arbitrary; we
		 * return the number of present CPUs for -HV (since a host
		 * will have secondary threads "offline"), and for other KVM
		 * implementations just count online CPUs.
		 */
557
		if (hv_enabled)
558 559 560
			r = num_present_cpus();
		else
			r = num_online_cpus();
561 562 563 564
		break;
	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
565 566 567 568 569
#ifdef CONFIG_PPC_BOOK3S_64
	case KVM_CAP_PPC_GET_SMMU_INFO:
		r = 1;
		break;
#endif
570 571 572 573 574 575 576 577 578 579 580 581 582 583
	default:
		r = 0;
		break;
	}
	return r;

}

long kvm_arch_dev_ioctl(struct file *filp,
                        unsigned int ioctl, unsigned long arg)
{
	return -EINVAL;
}

584
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
585 586
			   struct kvm_memory_slot *dont)
{
587
	kvmppc_core_free_memslot(kvm, free, dont);
588 589
}

590 591
int kvm_arch_create_memslot(struct kvm *kvm, struct kvm_memory_slot *slot,
			    unsigned long npages)
592
{
593
	return kvmppc_core_create_memslot(kvm, slot, npages);
594 595
}

596
int kvm_arch_prepare_memory_region(struct kvm *kvm,
597
				   struct kvm_memory_slot *memslot,
598
				   const struct kvm_userspace_memory_region *mem,
599
				   enum kvm_mr_change change)
600
{
601
	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
602 603
}

604
void kvm_arch_commit_memory_region(struct kvm *kvm,
605
				   const struct kvm_userspace_memory_region *mem,
606 607
				   const struct kvm_memory_slot *old,
				   enum kvm_mr_change change)
608
{
609
	kvmppc_core_commit_memory_region(kvm, mem, old);
610 611
}

612 613
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
614
{
615
	kvmppc_core_flush_memslot(kvm, slot);
616 617
}

618 619
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
620 621
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
622 623
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
624
		kvmppc_create_vcpu_debugfs(vcpu, id);
625
	}
626
	return vcpu;
627 628
}

629
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
630 631 632
{
}

633 634
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
635 636 637
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

638
	kvmppc_remove_vcpu_debugfs(vcpu);
S
Scott Wood 已提交
639 640 641 642 643

	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
644 645 646
	case KVMPPC_IRQ_XICS:
		kvmppc_xics_free_icp(vcpu);
		break;
S
Scott Wood 已提交
647 648
	}

649
	kvmppc_core_vcpu_free(vcpu);
650 651 652 653 654 655 656 657 658
}

void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
	kvm_arch_vcpu_free(vcpu);
}

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
659
	return kvmppc_core_pending_dec(vcpu);
660 661
}

A
Alexander Graf 已提交
662 663 664 665 666
enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
667
	kvmppc_decrementer_func(vcpu);
A
Alexander Graf 已提交
668 669 670 671

	return HRTIMER_NORESTART;
}

672 673
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
674 675
	int ret;

A
Alexander Graf 已提交
676 677
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
678
	vcpu->arch.dec_expires = ~(u64)0;
679

680 681 682
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
683 684
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
685 686 687 688
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
689
	kvmppc_mmu_destroy(vcpu);
690
	kvmppc_subarch_vcpu_uninit(vcpu);
691 692 693 694
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
695 696 697 698 699 700 701 702 703 704
#ifdef CONFIG_BOOKE
	/*
	 * vrsave (formerly usprg0) isn't used by Linux, but may
	 * be used by the guest.
	 *
	 * On non-booke this is associated with Altivec and
	 * is handled by code in book3s.c.
	 */
	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
#endif
705
	kvmppc_core_vcpu_load(vcpu, cpu);
706 707 708 709
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
710
	kvmppc_core_vcpu_put(vcpu);
711 712 713
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
714 715 716 717 718
}

static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
719
	u64 uninitialized_var(gpr);
720

721
	if (run->mmio.len > sizeof(gpr)) {
722 723 724 725
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

726
	if (!vcpu->arch.mmio_host_swabbed) {
727
		switch (run->mmio.len) {
728
		case 8: gpr = *(u64 *)run->mmio.data; break;
729 730 731
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
732 733 734
		}
	} else {
		switch (run->mmio.len) {
735 736 737
		case 8: gpr = swab64(*(u64 *)run->mmio.data); break;
		case 4: gpr = swab32(*(u32 *)run->mmio.data); break;
		case 2: gpr = swab16(*(u16 *)run->mmio.data); break;
738
		case 1: gpr = *(u8 *)run->mmio.data; break;
739 740
		}
	}
741

A
Alexander Graf 已提交
742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757
	if (vcpu->arch.mmio_sign_extend) {
		switch (run->mmio.len) {
#ifdef CONFIG_PPC64
		case 4:
			gpr = (s64)(s32)gpr;
			break;
#endif
		case 2:
			gpr = (s64)(s16)gpr;
			break;
		case 1:
			gpr = (s64)(s8)gpr;
			break;
		}
	}

758
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
759

760 761
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
762 763
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
764
	case KVM_MMIO_REG_FPR:
765
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
766
		break;
767
#ifdef CONFIG_PPC_BOOK3S
768 769
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
770
		break;
771
	case KVM_MMIO_REG_FQPR:
772
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
773
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
774
		break;
775
#endif
776 777 778
	default:
		BUG();
	}
779 780 781
}

int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
782 783
		       unsigned int rt, unsigned int bytes,
		       int is_default_endian)
784
{
785
	int idx, ret;
786
	bool host_swabbed;
787

788
	/* Pity C doesn't have a logical XOR operator */
789
	if (kvmppc_need_byteswap(vcpu)) {
790
		host_swabbed = is_default_endian;
791
	} else {
792
		host_swabbed = !is_default_endian;
793
	}
794

795 796 797 798 799 800 801 802 803 804
	if (bytes > sizeof(run->mmio.data)) {
		printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
		       run->mmio.len);
	}

	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	run->mmio.len = bytes;
	run->mmio.is_write = 0;

	vcpu->arch.io_gpr = rt;
805
	vcpu->arch.mmio_host_swabbed = host_swabbed;
806 807
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
A
Alexander Graf 已提交
808
	vcpu->arch.mmio_sign_extend = 0;
809

810 811
	idx = srcu_read_lock(&vcpu->kvm->srcu);

812
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
813 814 815 816 817
			      bytes, &run->mmio.data);

	srcu_read_unlock(&vcpu->kvm->srcu, idx);

	if (!ret) {
A
Alexander Graf 已提交
818 819 820 821 822
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

823 824
	return EMULATE_DO_MMIO;
}
825
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
826

A
Alexander Graf 已提交
827 828
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
829 830
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
831 832 833 834
{
	int r;

	vcpu->arch.mmio_sign_extend = 1;
835
	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
A
Alexander Graf 已提交
836 837 838 839

	return r;
}

840
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
841
			u64 val, unsigned int bytes, int is_default_endian)
842 843
{
	void *data = run->mmio.data;
844
	int idx, ret;
845
	bool host_swabbed;
846

847
	/* Pity C doesn't have a logical XOR operator */
848
	if (kvmppc_need_byteswap(vcpu)) {
849
		host_swabbed = is_default_endian;
850
	} else {
851
		host_swabbed = !is_default_endian;
852
	}
853 854 855 856 857 858 859 860 861 862 863 864 865

	if (bytes > sizeof(run->mmio.data)) {
		printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
		       run->mmio.len);
	}

	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	run->mmio.len = bytes;
	run->mmio.is_write = 1;
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 1;

	/* Store the value at the lowest bytes in 'data'. */
866
	if (!host_swabbed) {
867
		switch (bytes) {
868
		case 8: *(u64 *)data = val; break;
869 870 871 872 873 874
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
875 876 877 878
		case 8: *(u64 *)data = swab64(val); break;
		case 4: *(u32 *)data = swab32(val); break;
		case 2: *(u16 *)data = swab16(val); break;
		case 1: *(u8  *)data = val; break;
879 880 881
		}
	}

882 883
	idx = srcu_read_lock(&vcpu->kvm->srcu);

884
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
885 886 887 888 889
			       bytes, &run->mmio.data);

	srcu_read_unlock(&vcpu->kvm->srcu, idx);

	if (!ret) {
A
Alexander Graf 已提交
890 891 892 893
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

894 895
	return EMULATE_DO_MMIO;
}
896
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
897

898 899 900 901 902 903 904 905 906 907 908 909 910 911
int kvm_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
	int r = 0;
	union kvmppc_one_reg val;
	int size;

	size = one_reg_size(reg->id);
	if (size > sizeof(val))
		return -EINVAL;

	r = kvmppc_get_one_reg(vcpu, reg->id, &val);
	if (r == -EINVAL) {
		r = 0;
		switch (reg->id) {
912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
			break;
		case KVM_REG_PPC_VRSAVE:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
			break;
#endif /* CONFIG_ALTIVEC */
935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966
		default:
			r = -EINVAL;
			break;
		}
	}

	if (r)
		return r;

	if (copy_to_user((char __user *)(unsigned long)reg->addr, &val, size))
		r = -EFAULT;

	return r;
}

int kvm_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, struct kvm_one_reg *reg)
{
	int r;
	union kvmppc_one_reg val;
	int size;

	size = one_reg_size(reg->id);
	if (size > sizeof(val))
		return -EINVAL;

	if (copy_from_user(&val, (char __user *)(unsigned long)reg->addr, size))
		return -EFAULT;

	r = kvmppc_set_one_reg(vcpu, reg->id, &val);
	if (r == -EINVAL) {
		r = 0;
		switch (reg->id) {
967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
			break;
		case KVM_REG_PPC_VRSAVE:
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
			break;
#endif /* CONFIG_ALTIVEC */
986 987 988 989 990 991 992 993 994
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run)
{
	int r;
	sigset_t sigsaved;

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);

	if (vcpu->mmio_needed) {
		if (!vcpu->mmio_is_write)
			kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
1007 1008 1009 1010 1011 1012 1013
	} else if (vcpu->arch.osi_needed) {
		u64 *gprs = run->osi.gprs;
		int i;

		for (i = 0; i < 32; i++)
			kvmppc_set_gpr(vcpu, i, gprs[i]);
		vcpu->arch.osi_needed = 0;
1014 1015 1016 1017 1018 1019 1020
	} else if (vcpu->arch.hcall_needed) {
		int i;

		kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
		for (i = 0; i < 9; ++i)
			kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
		vcpu->arch.hcall_needed = 0;
1021 1022 1023 1024 1025
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1026 1027
	}

1028
	r = kvmppc_vcpu_run(run, vcpu);
1029 1030 1031 1032 1033 1034 1035 1036 1037

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &sigsaved, NULL);

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1038
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1039
		kvmppc_core_dequeue_external(vcpu);
1040 1041 1042 1043
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1044

1045
	kvm_vcpu_kick(vcpu);
1046

1047 1048 1049
	return 0;
}

1050 1051 1052 1053 1054 1055 1056 1057 1058
static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
				     struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
1059 1060 1061 1062
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1063 1064 1065 1066
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1067 1068
	case KVM_CAP_PPC_EPR:
		r = 0;
1069 1070 1071 1072
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1073
		break;
1074 1075 1076 1077 1078 1079
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1080
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
	case KVM_CAP_SW_TLB: {
		struct kvm_config_tlb cfg;
		void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];

		r = -EFAULT;
		if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
			break;

		r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
		break;
S
Scott Wood 已提交
1091 1092 1093 1094
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
A
Al Viro 已提交
1095
		struct fd f;
S
Scott Wood 已提交
1096 1097 1098
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1099 1100
		f = fdget(cap->args[0]);
		if (!f.file)
S
Scott Wood 已提交
1101 1102 1103
			break;

		r = -EPERM;
A
Al Viro 已提交
1104
		dev = kvm_device_from_filp(f.file);
S
Scott Wood 已提交
1105 1106 1107
		if (dev)
			r = kvmppc_mpic_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1108
		fdput(f);
S
Scott Wood 已提交
1109
		break;
S
Scott Wood 已提交
1110 1111
	}
#endif
1112 1113
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
A
Al Viro 已提交
1114
		struct fd f;
1115 1116 1117
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1118 1119
		f = fdget(cap->args[0]);
		if (!f.file)
1120 1121 1122
			break;

		r = -EPERM;
A
Al Viro 已提交
1123
		dev = kvm_device_from_filp(f.file);
1124 1125 1126
		if (dev)
			r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1127
		fdput(f);
1128 1129 1130
		break;
	}
#endif /* CONFIG_KVM_XICS */
1131 1132 1133 1134 1135
	default:
		r = -EINVAL;
		break;
	}

1136 1137 1138
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1139 1140 1141
	return r;
}

1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160
int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
{
	return -EINVAL;
}

int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
{
	return -EINVAL;
}

long kvm_arch_vcpu_ioctl(struct file *filp,
                         unsigned int ioctl, unsigned long arg)
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;
	long r;

1161 1162
	switch (ioctl) {
	case KVM_INTERRUPT: {
1163 1164 1165
		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
1166
			goto out;
1167
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1168
		goto out;
1169
	}
1170

1171 1172 1173 1174 1175 1176 1177 1178 1179
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
		break;
	}
S
Scott Wood 已提交
1180

1181 1182 1183 1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194
	case KVM_SET_ONE_REG:
	case KVM_GET_ONE_REG:
	{
		struct kvm_one_reg reg;
		r = -EFAULT;
		if (copy_from_user(&reg, argp, sizeof(reg)))
			goto out;
		if (ioctl == KVM_SET_ONE_REG)
			r = kvm_vcpu_ioctl_set_one_reg(vcpu, &reg);
		else
			r = kvm_vcpu_ioctl_get_one_reg(vcpu, &reg);
		break;
	}

1195
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1196 1197 1198 1199 1200 1201 1202 1203 1204
	case KVM_DIRTY_TLB: {
		struct kvm_dirty_tlb dirty;
		r = -EFAULT;
		if (copy_from_user(&dirty, argp, sizeof(dirty)))
			goto out;
		r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
		break;
	}
#endif
1205 1206 1207 1208 1209 1210 1211 1212
	default:
		r = -EINVAL;
	}

out:
	return r;
}

1213 1214 1215 1216 1217
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

1218 1219
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
1220 1221 1222
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
1223 1224 1225 1226
	pvinfo->hcall[0] = cpu_to_be32(inst_sc1);
	pvinfo->hcall[1] = cpu_to_be32(inst_nop);
	pvinfo->hcall[2] = cpu_to_be32(inst_nop);
	pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1227
#else
1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241
	u32 inst_lis = 0x3c000000;
	u32 inst_ori = 0x60000000;
	u32 inst_sc = 0x44000002;
	u32 inst_imm_mask = 0xffff;

	/*
	 * The hypercall to get into KVM from within guest context is as
	 * follows:
	 *
	 *    lis r0, r0, KVM_SC_MAGIC_R0@h
	 *    ori r0, KVM_SC_MAGIC_R0@l
	 *    sc
	 *    nop
	 */
1242 1243 1244 1245
	pvinfo->hcall[0] = cpu_to_be32(inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask));
	pvinfo->hcall[1] = cpu_to_be32(inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask));
	pvinfo->hcall[2] = cpu_to_be32(inst_sc);
	pvinfo->hcall[3] = cpu_to_be32(inst_nop);
1246
#endif
1247

1248 1249
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

1250 1251 1252
	return 0;
}

1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
int kvm_vm_ioctl_irq_line(struct kvm *kvm, struct kvm_irq_level *irq_event,
			  bool line_status)
{
	if (!irqchip_in_kernel(kvm))
		return -ENXIO;

	irq_event->status = kvm_set_irq(kvm, KVM_USERSPACE_IRQ_SOURCE_ID,
					irq_event->irq, irq_event->level,
					line_status);
	return 0;
}

1265 1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282

static int kvm_vm_ioctl_enable_cap(struct kvm *kvm,
				   struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
#ifdef CONFIG_KVM_BOOK3S_64_HANDLER
	case KVM_CAP_PPC_ENABLE_HCALL: {
		unsigned long hcall = cap->args[0];

		r = -EINVAL;
		if (hcall > MAX_HCALL_OPCODE || (hcall & 3) ||
		    cap->args[1] > 1)
			break;
1283 1284
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300
		if (cap->args[1])
			set_bit(hcall / 4, kvm->arch.enabled_hcalls);
		else
			clear_bit(hcall / 4, kvm->arch.enabled_hcalls);
		r = 0;
		break;
	}
#endif
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

1301 1302 1303
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
1304
	struct kvm *kvm __maybe_unused = filp->private_data;
1305
	void __user *argp = (void __user *)arg;
1306 1307 1308
	long r;

	switch (ioctl) {
1309 1310
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
1311
		memset(&pvinfo, 0, sizeof(pvinfo));
1312 1313 1314 1315 1316 1317 1318 1319
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
1320 1321 1322 1323 1324 1325 1326 1327 1328
	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vm_ioctl_enable_cap(kvm, &cap);
		break;
	}
1329
#ifdef CONFIG_PPC_BOOK3S_64
1330 1331 1332 1333 1334 1335 1336 1337 1338
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
		goto out;
	}
1339 1340
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
1341
		struct kvm *kvm = filp->private_data;
1342 1343

		memset(&info, 0, sizeof(info));
1344
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1345 1346 1347 1348
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
1349 1350 1351 1352 1353 1354
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
1355 1356 1357 1358
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
1359
#else /* CONFIG_PPC_BOOK3S_64 */
1360
	default:
1361
		r = -ENOTTY;
1362
#endif
1363
	}
1364
out:
1365 1366 1367
	return r;
}

1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384
static unsigned long lpid_inuse[BITS_TO_LONGS(KVMPPC_NR_LPIDS)];
static unsigned long nr_lpids;

long kvmppc_alloc_lpid(void)
{
	long lpid;

	do {
		lpid = find_first_zero_bit(lpid_inuse, KVMPPC_NR_LPIDS);
		if (lpid >= nr_lpids) {
			pr_err("%s: No LPIDs free\n", __func__);
			return -ENOMEM;
		}
	} while (test_and_set_bit(lpid, lpid_inuse));

	return lpid;
}
1385
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1386 1387 1388 1389 1390

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
1391
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1392 1393 1394 1395 1396

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
1397
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1398 1399 1400 1401 1402 1403

void kvmppc_init_lpid(unsigned long nr_lpids_param)
{
	nr_lpids = min_t(unsigned long, KVMPPC_NR_LPIDS, nr_lpids_param);
	memset(lpid_inuse, 0, sizeof(lpid_inuse));
}
1404
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1405

1406 1407 1408 1409 1410
int kvm_arch_init(void *opaque)
{
	return 0;
}

1411
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);