powerpc.c 18.4 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>
28 29 30
#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
31
#include <asm/tlbflush.h>
32
#include <asm/cputhreads.h>
33
#include "timing.h"
P
Paul Mackerras 已提交
34
#include "../mm/mmu_decl.h"
35

36 37 38
#define CREATE_TRACE_POINTS
#include "trace.h"

39 40
int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
41
	return !(v->arch.shared->msr & MSR_WE) ||
42 43
	       !!(v->arch.pending_exceptions) ||
	       v->requests;
44 45
}

46 47 48 49 50
int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
	return 1;
}

51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
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;

	if (!(vcpu->arch.shared->msr & MSR_SF)) {
		/* 32 bit mode */
		param1 &= 0xffffffff;
		param2 &= 0xffffffff;
		param3 &= 0xffffffff;
		param4 &= 0xffffffff;
	}

	switch (nr) {
70 71 72 73 74
	case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
	{
		vcpu->arch.magic_page_pa = param1;
		vcpu->arch.magic_page_ea = param2;

75
		r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
76

77 78 79
		r = HC_EV_SUCCESS;
		break;
	}
80 81
	case HC_VENDOR_KVM | KVM_HC_FEATURES:
		r = HC_EV_SUCCESS;
S
Scott Wood 已提交
82 83
#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
		/* XXX Missing magic page on 44x */
84 85
		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
86 87 88 89 90 91 92 93

		/* Second return value is in r4 */
		break;
	default:
		r = HC_EV_UNIMPLEMENTED;
		break;
	}

94 95
	kvmppc_set_gpr(vcpu, 4, r2);

96 97
	return r;
}
98

99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116
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;

#ifdef CONFIG_KVM_BOOK3S_64_HV
	/* HV KVM can only do PAPR mode for now */
	if (!vcpu->arch.papr_enabled)
		goto out;
#endif

117 118 119 120 121
#ifdef CONFIG_KVM_BOOKE_HV
	if (!cpu_has_feature(CPU_FTR_EMB_HV))
		goto out;
#endif

122 123 124 125 126 127 128
	r = true;

out:
	vcpu->arch.sane = r;
	return r ? 0 : -EINVAL;
}

129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151
int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
	enum emulation_result er;
	int r;

	er = kvmppc_emulate_instruction(run, vcpu);
	switch (er) {
	case EMULATE_DONE:
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_GUEST_NV;
		break;
	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:
		/* XXX Deliver Program interrupt to guest. */
		printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
152
		       kvmppc_get_last_inst(vcpu));
153 154 155 156 157 158 159 160 161
		r = RESUME_HOST;
		break;
	default:
		BUG();
	}

	return r;
}

162
int kvm_arch_hardware_enable(void *garbage)
163
{
164
	return 0;
165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181
}

void kvm_arch_hardware_disable(void *garbage)
{
}

int kvm_arch_hardware_setup(void)
{
	return 0;
}

void kvm_arch_hardware_unsetup(void)
{
}

void kvm_arch_check_processor_compat(void *rtn)
{
182
	*(int *)rtn = kvmppc_core_check_processor_compat();
183 184
}

185
int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
186
{
187 188 189
	if (type)
		return -EINVAL;

190
	return kvmppc_core_init_vm(kvm);
191 192
}

193
void kvm_arch_destroy_vm(struct kvm *kvm)
194 195
{
	unsigned int i;
196
	struct kvm_vcpu *vcpu;
197

198 199 200 201 202 203 204 205
	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);
206 207 208

	kvmppc_core_destroy_vm(kvm);

209
	mutex_unlock(&kvm->lock);
210 211
}

212 213 214 215
void kvm_arch_sync_events(struct kvm *kvm)
{
}

216 217 218 219 220
int kvm_dev_ioctl_check_extension(long ext)
{
	int r;

	switch (ext) {
S
Scott Wood 已提交
221 222 223
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_SREGS:
#else
224
	case KVM_CAP_PPC_SEGSTATE:
225
	case KVM_CAP_PPC_HIOR:
226
	case KVM_CAP_PPC_PAPR:
S
Scott Wood 已提交
227
#endif
228
	case KVM_CAP_PPC_UNSET_IRQ:
229
	case KVM_CAP_PPC_IRQ_LEVEL:
230
	case KVM_CAP_ENABLE_CAP:
231
	case KVM_CAP_ONE_REG:
232 233 234 235
		r = 1;
		break;
#ifndef CONFIG_KVM_BOOK3S_64_HV
	case KVM_CAP_PPC_PAIRED_SINGLES:
236
	case KVM_CAP_PPC_OSI:
237
	case KVM_CAP_PPC_GET_PVINFO:
S
Scott Wood 已提交
238
#if defined(CONFIG_KVM_E500) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
239 240
	case KVM_CAP_SW_TLB:
#endif
241 242
		r = 1;
		break;
243 244 245
	case KVM_CAP_COALESCED_MMIO:
		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
		break;
246 247 248 249 250
#endif
#ifdef CONFIG_KVM_BOOK3S_64_HV
	case KVM_CAP_SPAPR_TCE:
		r = 1;
		break;
251 252 253
	case KVM_CAP_PPC_SMT:
		r = threads_per_core;
		break;
254 255
	case KVM_CAP_PPC_RMA:
		r = 1;
256 257 258
		/* PPC970 requires an RMA */
		if (cpu_has_feature(CPU_FTR_ARCH_201))
			r = 2;
259
		break;
260 261 262
	case KVM_CAP_SYNC_MMU:
		r = cpu_has_feature(CPU_FTR_ARCH_206) ? 1 : 0;
		break;
263
#endif
264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279
	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.
		 */
#ifdef CONFIG_KVM_BOOK3S_64_HV
		r = num_present_cpus();
#else
		r = num_online_cpus();
#endif
		break;
	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
280 281 282 283 284 285 286 287 288 289 290 291 292 293
	default:
		r = 0;
		break;
	}
	return r;

}

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

294 295 296 297 298 299 300 301 302 303
void kvm_arch_free_memslot(struct kvm_memory_slot *free,
			   struct kvm_memory_slot *dont)
{
}

int kvm_arch_create_memslot(struct kvm_memory_slot *slot, unsigned long npages)
{
	return 0;
}

304 305 306 307 308
int kvm_arch_prepare_memory_region(struct kvm *kvm,
                                   struct kvm_memory_slot *memslot,
                                   struct kvm_memory_slot old,
                                   struct kvm_userspace_memory_region *mem,
                                   int user_alloc)
309
{
310
	return kvmppc_core_prepare_memory_region(kvm, mem);
311 312
}

313 314 315 316 317
void kvm_arch_commit_memory_region(struct kvm *kvm,
               struct kvm_userspace_memory_region *mem,
               struct kvm_memory_slot old,
               int user_alloc)
{
318
	kvmppc_core_commit_memory_region(kvm, mem);
319 320 321
}


322 323 324 325
void kvm_arch_flush_shadow(struct kvm *kvm)
{
}

326 327
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
328 329
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
330 331
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
332
		kvmppc_create_vcpu_debugfs(vcpu, id);
333
	}
334
	return vcpu;
335 336 337 338
}

void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
339 340 341 342
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);
	tasklet_kill(&vcpu->arch.tasklet);

343
	kvmppc_remove_vcpu_debugfs(vcpu);
344
	kvmppc_core_vcpu_free(vcpu);
345 346 347 348 349 350 351 352 353
}

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

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
354
	return kvmppc_core_pending_dec(vcpu);
355 356
}

A
Alexander Graf 已提交
357 358 359 360 361 362 363 364 365 366 367 368 369 370
/*
 * low level hrtimer wake routine. Because this runs in hardirq context
 * we schedule a tasklet to do the real work.
 */
enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	tasklet_schedule(&vcpu->arch.tasklet);

	return HRTIMER_NORESTART;
}

371 372
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
A
Alexander Graf 已提交
373 374 375
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
376
	vcpu->arch.dec_expires = ~(u64)0;
377

378 379 380 381
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif

382 383 384 385 386
	return 0;
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
387
	kvmppc_mmu_destroy(vcpu);
388 389 390 391
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
392 393 394 395 396 397 398 399 400 401
#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
402
	kvmppc_core_vcpu_load(vcpu, cpu);
403
	vcpu->cpu = smp_processor_id();
404 405 406 407
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
408
	kvmppc_core_vcpu_put(vcpu);
409 410 411
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
412
	vcpu->cpu = -1;
413 414
}

J
Jan Kiszka 已提交
415
int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
416
                                        struct kvm_guest_debug *dbg)
417
{
418
	return -EINVAL;
419 420 421 422 423
}

static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
                                     struct kvm_run *run)
{
424
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
425 426 427 428 429
}

static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
430
	u64 uninitialized_var(gpr);
431

432
	if (run->mmio.len > sizeof(gpr)) {
433 434 435 436 437 438
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

	if (vcpu->arch.mmio_is_bigendian) {
		switch (run->mmio.len) {
439
		case 8: gpr = *(u64 *)run->mmio.data; break;
440 441 442
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
443 444 445 446
		}
	} else {
		/* Convert BE data from userland back to LE. */
		switch (run->mmio.len) {
447 448 449
		case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
		case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
450 451
		}
	}
452

A
Alexander Graf 已提交
453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468
	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;
		}
	}

469
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
470

471 472
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
473 474
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
475 476
	case KVM_MMIO_REG_FPR:
		vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
477
		break;
478
#ifdef CONFIG_PPC_BOOK3S
479 480
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
481
		break;
482 483 484
	case KVM_MMIO_REG_FQPR:
		vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
485
		break;
486
#endif
487 488 489
	default:
		BUG();
	}
490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507
}

int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
                       unsigned int rt, unsigned int bytes, int is_bigendian)
{
	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;
	vcpu->arch.mmio_is_bigendian = is_bigendian;
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
A
Alexander Graf 已提交
508
	vcpu->arch.mmio_sign_extend = 0;
509 510 511 512

	return EMULATE_DO_MMIO;
}

A
Alexander Graf 已提交
513 514 515 516 517 518 519 520 521 522 523 524
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
                        unsigned int rt, unsigned int bytes, int is_bigendian)
{
	int r;

	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	vcpu->arch.mmio_sign_extend = 1;

	return r;
}

525
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
526
                        u64 val, unsigned int bytes, int is_bigendian)
527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543
{
	void *data = run->mmio.data;

	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'. */
	if (is_bigendian) {
		switch (bytes) {
544
		case 8: *(u64 *)data = val; break;
545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		/* Store LE value into 'data'. */
		switch (bytes) {
		case 4: st_le32(data, val); break;
		case 2: st_le16(data, val); break;
		case 1: *(u8 *)data = val; break;
		}
	}

	return EMULATE_DO_MMIO;
}

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;
	} else if (vcpu->arch.dcr_needed) {
		if (!vcpu->arch.dcr_is_write)
			kvmppc_complete_dcr_load(vcpu, run);
		vcpu->arch.dcr_needed = 0;
577 578 579 580 581 582 583
	} 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;
584 585 586 587 588 589 590
	} 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;
591 592
	}

593
	r = kvmppc_vcpu_run(run, vcpu);
594 595 596 597 598 599 600 601 602

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

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
603
	if (irq->irq == KVM_INTERRUPT_UNSET) {
604
		kvmppc_core_dequeue_external(vcpu, irq);
605 606 607 608
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
609

610
	kvm_vcpu_kick(vcpu);
611

612 613 614
	return 0;
}

615 616 617 618 619 620 621 622 623
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) {
624 625 626 627
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
628 629 630 631
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
S
Scott Wood 已提交
632
#if defined(CONFIG_KVM_E500) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
633 634 635 636 637 638 639 640 641 642 643 644
	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;
	}
#endif
645 646 647 648 649
	default:
		r = -EINVAL;
		break;
	}

650 651 652
	if (!r)
		r = kvmppc_sanity_check(vcpu);

653 654 655
	return r;
}

656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674
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;

675 676
	switch (ioctl) {
	case KVM_INTERRUPT: {
677 678 679
		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
680
			goto out;
681
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
682
		goto out;
683
	}
684

685 686 687 688 689 690 691 692 693
	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
694

695 696 697 698 699 700 701 702 703 704 705 706 707 708
	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;
	}

S
Scott Wood 已提交
709
#if defined(CONFIG_KVM_E500) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
710 711 712 713 714 715 716 717 718 719
	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

720 721 722 723 724 725 726 727
	default:
		r = -EINVAL;
	}

out:
	return r;
}

728 729 730 731 732
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
	u32 inst_lis = 0x3c000000;
	u32 inst_ori = 0x60000000;
	u32 inst_nop = 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
	 */
	pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
	pvinfo->hcall[2] = inst_sc;
	pvinfo->hcall[3] = inst_nop;

	return 0;
}

758 759 760
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
761
	void __user *argp = (void __user *)arg;
762 763 764
	long r;

	switch (ioctl) {
765 766
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
767
		memset(&pvinfo, 0, sizeof(pvinfo));
768 769 770 771 772 773 774 775
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
776 777 778 779 780 781 782 783 784 785 786
#ifdef CONFIG_KVM_BOOK3S_64_HV
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
		struct kvm *kvm = filp->private_data;

		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;
	}
787 788 789 790 791 792 793 794 795 796

	case KVM_ALLOCATE_RMA: {
		struct kvm *kvm = filp->private_data;
		struct kvm_allocate_rma rma;

		r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
		if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
			r = -EFAULT;
		break;
	}
797 798
#endif /* CONFIG_KVM_BOOK3S_64_HV */

799
	default:
800
		r = -ENOTTY;
801 802
	}

803
out:
804 805 806
	return r;
}

807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840
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;
}

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}

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));
}

841 842 843 844 845 846 847 848
int kvm_arch_init(void *opaque)
{
	return 0;
}

void kvm_arch_exit(void)
{
}