powerpc.c 31.8 KB
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/*
 * 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>
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#include <linux/hrtimer.h>
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#include <linux/fs.h>
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#include <linux/slab.h>
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#include <linux/file.h>
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#include <linux/module.h>
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#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
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#include <asm/tlbflush.h>
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#include <asm/cputhreads.h>
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#include <asm/irqflags.h>
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#include <asm/iommu.h>
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#include "timing.h"
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#include "irq.h"
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#include "../mm/mmu_decl.h"
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#define CREATE_TRACE_POINTS
#include "trace.h"

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struct kvmppc_ops *kvmppc_hv_ops;
EXPORT_SYMBOL_GPL(kvmppc_hv_ops);
struct kvmppc_ops *kvmppc_pr_ops;
EXPORT_SYMBOL_GPL(kvmppc_pr_ops);

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int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
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	return !!(v->arch.pending_exceptions) ||
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	       v->requests;
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}

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int kvm_arch_vcpu_should_kick(struct kvm_vcpu *vcpu)
{
	return 1;
}

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/*
 * Common checks before entering the guest world.  Call with interrupts
 * disabled.
 *
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 * returns:
 *
 * == 1 if we're ready to go into guest state
 * <= 0 if we need to go back to the host with return value
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 */
int kvmppc_prepare_to_enter(struct kvm_vcpu *vcpu)
{
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	int r;

	WARN_ON(irqs_disabled());
	hard_irq_disable();
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	while (true) {
		if (need_resched()) {
			local_irq_enable();
			cond_resched();
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			hard_irq_disable();
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			continue;
		}

		if (signal_pending(current)) {
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			kvmppc_account_exit(vcpu, SIGNAL_EXITS);
			vcpu->run->exit_reason = KVM_EXIT_INTR;
			r = -EINTR;
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			break;
		}

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		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).
		 */
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		smp_mb();
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		if (vcpu->requests) {
			/* Make sure we process requests preemptable */
			local_irq_enable();
			trace_kvm_check_requests(vcpu);
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			r = kvmppc_core_check_requests(vcpu);
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			hard_irq_disable();
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			if (r > 0)
				continue;
			break;
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		}

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

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		__kvm_guest_enter();
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		return 1;
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	}

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	/* return to host */
	local_irq_enable();
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	return r;
}
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EXPORT_SYMBOL_GPL(kvmppc_prepare_to_enter);
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#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

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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;

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	if (!(kvmppc_get_msr(vcpu) & MSR_SF)) {
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		/* 32 bit mode */
		param1 &= 0xffffffff;
		param2 &= 0xffffffff;
		param3 &= 0xffffffff;
		param4 &= 0xffffffff;
	}

	switch (nr) {
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	case KVM_HCALL_TOKEN(KVM_HC_PPC_MAP_MAGIC_PAGE):
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	{
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#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

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		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;
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#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

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		r2 = KVM_MAGIC_FEAT_SR | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
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		r = EV_SUCCESS;
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		break;
	}
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	case KVM_HCALL_TOKEN(KVM_HC_FEATURES):
		r = EV_SUCCESS;
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#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500V2)
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		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif
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		/* Second return value is in r4 */
		break;
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	case EV_HCALL_TOKEN(EV_IDLE):
		r = EV_SUCCESS;
		kvm_vcpu_block(vcpu);
		clear_bit(KVM_REQ_UNHALT, &vcpu->requests);
		break;
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	default:
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		r = EV_UNIMPLEMENTED;
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		break;
	}

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	kvmppc_set_gpr(vcpu, 4, r2);

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	return r;
}
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EXPORT_SYMBOL_GPL(kvmppc_kvm_pv);
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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 */
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	if (!vcpu->arch.papr_enabled && is_kvmppc_hv_enabled(vcpu->kvm))
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		goto out;

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#ifdef CONFIG_KVM_BOOKE_HV
	if (!cpu_has_feature(CPU_FTR_EMB_HV))
		goto out;
#endif

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	r = true;

out:
	vcpu->arch.sane = r;
	return r ? 0 : -EINVAL;
}
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EXPORT_SYMBOL_GPL(kvmppc_sanity_check);
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int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
	enum emulation_result er;
	int r;

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	er = kvmppc_emulate_loadstore(vcpu);
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	switch (er) {
	case EMULATE_DONE:
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_GUEST_NV;
		break;
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	case EMULATE_AGAIN:
		r = RESUME_GUEST;
		break;
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	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:
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	{
		u32 last_inst;

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		kvmppc_get_last_inst(vcpu, INST_GENERIC, &last_inst);
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		/* XXX Deliver Program interrupt to guest. */
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		pr_emerg("%s: emulation failed (%08x)\n", __func__, last_inst);
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		r = RESUME_HOST;
		break;
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	}
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	default:
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		WARN_ON(1);
		r = RESUME_GUEST;
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	}

	return r;
}
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EXPORT_SYMBOL_GPL(kvmppc_emulate_mmio);
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int kvmppc_st(struct kvm_vcpu *vcpu, ulong *eaddr, int size, void *ptr,
	      bool data)
{
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	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
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	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;

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	/* 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;
	}

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	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)
{
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	ulong mp_pa = vcpu->arch.magic_page_pa & KVM_PAM & PAGE_MASK;
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	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;

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	/* 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;
	}

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	if (kvm_read_guest(vcpu->kvm, pte.raddr, ptr, size))
		return EMULATE_DO_MMIO;
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	return EMULATE_DONE;
}
EXPORT_SYMBOL_GPL(kvmppc_ld);

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int kvm_arch_hardware_enable(void)
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{
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	return 0;
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}

int kvm_arch_hardware_setup(void)
{
	return 0;
}

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

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int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
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{
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	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;
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	return kvmppc_core_init_vm(kvm);
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err_out:
	return -EINVAL;
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}

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void kvm_arch_destroy_vm(struct kvm *kvm)
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{
	unsigned int i;
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	struct kvm_vcpu *vcpu;
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#ifdef CONFIG_KVM_XICS
	/*
	 * We call kick_all_cpus_sync() to ensure that all
	 * CPUs have executed any pending IPIs before we
	 * continue and free VCPUs structures below.
	 */
	if (is_kvmppc_hv_enabled(kvm))
		kick_all_cpus_sync();
#endif

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	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);
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	kvmppc_core_destroy_vm(kvm);

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	mutex_unlock(&kvm->lock);
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	/* drop the module reference */
	module_put(kvm->arch.kvm_ops->owner);
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}

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

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	switch (ext) {
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#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_SREGS:
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	case KVM_CAP_PPC_BOOKE_WATCHDOG:
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	case KVM_CAP_PPC_EPR:
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#else
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	case KVM_CAP_PPC_SEGSTATE:
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	case KVM_CAP_PPC_HIOR:
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	case KVM_CAP_PPC_PAPR:
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#endif
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	case KVM_CAP_PPC_UNSET_IRQ:
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	case KVM_CAP_PPC_IRQ_LEVEL:
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	case KVM_CAP_ENABLE_CAP:
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	case KVM_CAP_ENABLE_CAP_VM:
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	case KVM_CAP_ONE_REG:
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	case KVM_CAP_IOEVENTFD:
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	case KVM_CAP_DEVICE_CTRL:
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		r = 1;
		break;
	case KVM_CAP_PPC_PAIRED_SINGLES:
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	case KVM_CAP_PPC_OSI:
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	case KVM_CAP_PPC_GET_PVINFO:
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#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
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	case KVM_CAP_SW_TLB:
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#endif
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		/* We support this only for PR */
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		r = !hv_enabled;
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		break;
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#ifdef CONFIG_KVM_MMIO
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	case KVM_CAP_COALESCED_MMIO:
		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
		break;
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#endif
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#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC:
		r = 1;
		break;
#endif

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#ifdef CONFIG_PPC_BOOK3S_64
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	case KVM_CAP_SPAPR_TCE:
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	case KVM_CAP_SPAPR_TCE_64:
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	case KVM_CAP_PPC_ALLOC_HTAB:
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	case KVM_CAP_PPC_RTAS:
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	case KVM_CAP_PPC_FIXUP_HCALL:
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	case KVM_CAP_PPC_ENABLE_HCALL:
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#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS:
#endif
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		r = 1;
		break;
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#endif /* CONFIG_PPC_BOOK3S_64 */
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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	case KVM_CAP_PPC_SMT:
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		if (hv_enabled)
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			r = threads_per_subcore;
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		else
			r = 0;
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		break;
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	case KVM_CAP_PPC_RMA:
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		r = 0;
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		break;
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	case KVM_CAP_PPC_HWRNG:
		r = kvmppc_hwrng_present();
		break;
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#endif
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	case KVM_CAP_SYNC_MMU:
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#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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		r = hv_enabled;
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#elif defined(KVM_ARCH_WANT_MMU_NOTIFIER)
		r = 1;
#else
		r = 0;
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#endif
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		break;
#ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
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	case KVM_CAP_PPC_HTAB_FD:
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		r = hv_enabled;
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		break;
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#endif
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	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.
		 */
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		if (hv_enabled)
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			r = num_present_cpus();
		else
			r = num_online_cpus();
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		break;
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	case KVM_CAP_NR_MEMSLOTS:
		r = KVM_USER_MEM_SLOTS;
		break;
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	case KVM_CAP_MAX_VCPUS:
		r = KVM_MAX_VCPUS;
		break;
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#ifdef CONFIG_PPC_BOOK3S_64
	case KVM_CAP_PPC_GET_SMMU_INFO:
		r = 1;
		break;
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	case KVM_CAP_SPAPR_MULTITCE:
		r = 1;
		break;
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#endif
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	default:
		r = 0;
		break;
	}
	return r;

}

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

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void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
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			   struct kvm_memory_slot *dont)
{
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	kvmppc_core_free_memslot(kvm, free, dont);
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}

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

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int kvm_arch_prepare_memory_region(struct kvm *kvm,
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				   struct kvm_memory_slot *memslot,
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				   const struct kvm_userspace_memory_region *mem,
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				   enum kvm_mr_change change)
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{
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	return kvmppc_core_prepare_memory_region(kvm, memslot, mem);
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}

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void kvm_arch_commit_memory_region(struct kvm *kvm,
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				   const struct kvm_userspace_memory_region *mem,
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				   const struct kvm_memory_slot *old,
625
				   const struct kvm_memory_slot *new,
626
				   enum kvm_mr_change change)
627
{
628
	kvmppc_core_commit_memory_region(kvm, mem, old, new);
629 630
}

631 632
void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
				   struct kvm_memory_slot *slot)
633
{
634
	kvmppc_core_flush_memslot(kvm, slot);
635 636
}

637 638
struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
639 640
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
641 642
	if (!IS_ERR(vcpu)) {
		vcpu->arch.wqp = &vcpu->wq;
643
		kvmppc_create_vcpu_debugfs(vcpu, id);
644
	}
645
	return vcpu;
646 647
}

648
void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
649 650 651
{
}

652 653
void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
654 655 656
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);

657
	kvmppc_remove_vcpu_debugfs(vcpu);
S
Scott Wood 已提交
658 659 660 661 662

	switch (vcpu->arch.irq_type) {
	case KVMPPC_IRQ_MPIC:
		kvmppc_mpic_disconnect_vcpu(vcpu->arch.mpic, vcpu);
		break;
663 664 665
	case KVMPPC_IRQ_XICS:
		kvmppc_xics_free_icp(vcpu);
		break;
S
Scott Wood 已提交
666 667
	}

668
	kvmppc_core_vcpu_free(vcpu);
669 670 671 672 673 674 675 676 677
}

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

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
678
	return kvmppc_core_pending_dec(vcpu);
679 680
}

T
Thomas Huth 已提交
681
static enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
A
Alexander Graf 已提交
682 683 684 685
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
686
	kvmppc_decrementer_func(vcpu);
A
Alexander Graf 已提交
687 688 689 690

	return HRTIMER_NORESTART;
}

691 692
int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
693 694
	int ret;

A
Alexander Graf 已提交
695 696
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
697
	vcpu->arch.dec_expires = ~(u64)0;
698

699 700 701
#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif
702 703
	ret = kvmppc_subarch_vcpu_init(vcpu);
	return ret;
704 705 706 707
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
708
	kvmppc_mmu_destroy(vcpu);
709
	kvmppc_subarch_vcpu_uninit(vcpu);
710 711 712 713
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
714 715 716 717 718 719 720 721 722 723
#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
724
	kvmppc_core_vcpu_load(vcpu, cpu);
725 726 727 728
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
729
	kvmppc_core_vcpu_put(vcpu);
730 731 732
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
733 734 735 736 737
}

static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
738
	u64 uninitialized_var(gpr);
739

740
	if (run->mmio.len > sizeof(gpr)) {
741 742 743 744
		printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
		return;
	}

745
	if (!vcpu->arch.mmio_host_swabbed) {
746
		switch (run->mmio.len) {
747
		case 8: gpr = *(u64 *)run->mmio.data; break;
748 749 750
		case 4: gpr = *(u32 *)run->mmio.data; break;
		case 2: gpr = *(u16 *)run->mmio.data; break;
		case 1: gpr = *(u8 *)run->mmio.data; break;
751 752 753
		}
	} else {
		switch (run->mmio.len) {
754 755 756
		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;
757
		case 1: gpr = *(u8 *)run->mmio.data; break;
758 759
		}
	}
760

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761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776
	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;
		}
	}

777
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
778

779 780
	switch (vcpu->arch.io_gpr & KVM_MMIO_REG_EXT_MASK) {
	case KVM_MMIO_REG_GPR:
781 782
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
783
	case KVM_MMIO_REG_FPR:
784
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
785
		break;
786
#ifdef CONFIG_PPC_BOOK3S
787 788
	case KVM_MMIO_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
789
		break;
790
	case KVM_MMIO_REG_FQPR:
791
		VCPU_FPR(vcpu, vcpu->arch.io_gpr & KVM_MMIO_REG_MASK) = gpr;
792
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_MMIO_REG_MASK] = gpr;
793
		break;
794
#endif
795 796 797
	default:
		BUG();
	}
798 799 800
}

int kvmppc_handle_load(struct kvm_run *run, struct kvm_vcpu *vcpu,
801 802
		       unsigned int rt, unsigned int bytes,
		       int is_default_endian)
803
{
804
	int idx, ret;
805
	bool host_swabbed;
806

807
	/* Pity C doesn't have a logical XOR operator */
808
	if (kvmppc_need_byteswap(vcpu)) {
809
		host_swabbed = is_default_endian;
810
	} else {
811
		host_swabbed = !is_default_endian;
812
	}
813

814 815 816 817 818 819 820 821 822 823
	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;
824
	vcpu->arch.mmio_host_swabbed = host_swabbed;
825 826
	vcpu->mmio_needed = 1;
	vcpu->mmio_is_write = 0;
A
Alexander Graf 已提交
827
	vcpu->arch.mmio_sign_extend = 0;
828

829 830
	idx = srcu_read_lock(&vcpu->kvm->srcu);

831
	ret = kvm_io_bus_read(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
832 833 834 835 836
			      bytes, &run->mmio.data);

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

	if (!ret) {
A
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837 838 839 840 841
		kvmppc_complete_mmio_load(vcpu, run);
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

842 843
	return EMULATE_DO_MMIO;
}
844
EXPORT_SYMBOL_GPL(kvmppc_handle_load);
845

A
Alexander Graf 已提交
846 847
/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
848 849
			unsigned int rt, unsigned int bytes,
			int is_default_endian)
A
Alexander Graf 已提交
850 851 852 853
{
	int r;

	vcpu->arch.mmio_sign_extend = 1;
854
	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_default_endian);
A
Alexander Graf 已提交
855 856 857 858

	return r;
}

859
int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
860
			u64 val, unsigned int bytes, int is_default_endian)
861 862
{
	void *data = run->mmio.data;
863
	int idx, ret;
864
	bool host_swabbed;
865

866
	/* Pity C doesn't have a logical XOR operator */
867
	if (kvmppc_need_byteswap(vcpu)) {
868
		host_swabbed = is_default_endian;
869
	} else {
870
		host_swabbed = !is_default_endian;
871
	}
872 873 874 875 876 877 878 879 880 881 882 883 884

	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'. */
885
	if (!host_swabbed) {
886
		switch (bytes) {
887
		case 8: *(u64 *)data = val; break;
888 889 890 891 892 893
		case 4: *(u32 *)data = val; break;
		case 2: *(u16 *)data = val; break;
		case 1: *(u8  *)data = val; break;
		}
	} else {
		switch (bytes) {
894 895 896 897
		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;
898 899 900
		}
	}

901 902
	idx = srcu_read_lock(&vcpu->kvm->srcu);

903
	ret = kvm_io_bus_write(vcpu, KVM_MMIO_BUS, run->mmio.phys_addr,
904 905 906 907 908
			       bytes, &run->mmio.data);

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

	if (!ret) {
A
Alexander Graf 已提交
909 910 911 912
		vcpu->mmio_needed = 0;
		return EMULATE_DONE;
	}

913 914
	return EMULATE_DO_MMIO;
}
915
EXPORT_SYMBOL_GPL(kvmppc_handle_store);
916

917 918 919 920 921 922 923 924 925 926 927 928 929 930
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) {
931 932 933 934 935 936
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
937
			val.vval = vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0];
938 939 940 941 942 943
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
944
			val = get_reg_val(reg->id, vcpu->arch.vr.vscr.u[3]);
945 946
			break;
		case KVM_REG_PPC_VRSAVE:
947
			val = get_reg_val(reg->id, vcpu->arch.vrsave);
948 949
			break;
#endif /* CONFIG_ALTIVEC */
950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981
		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) {
982 983 984 985 986 987
#ifdef CONFIG_ALTIVEC
		case KVM_REG_PPC_VR0 ... KVM_REG_PPC_VR31:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
988
			vcpu->arch.vr.vr[reg->id - KVM_REG_PPC_VR0] = val.vval;
989 990 991 992 993 994
			break;
		case KVM_REG_PPC_VSCR:
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
995
			vcpu->arch.vr.vscr.u[3] = set_reg_val(reg->id, val);
996 997
			break;
		case KVM_REG_PPC_VRSAVE:
998 999 1000 1001 1002
			if (!cpu_has_feature(CPU_FTR_ALTIVEC)) {
				r = -ENXIO;
				break;
			}
			vcpu->arch.vrsave = set_reg_val(reg->id, val);
1003 1004
			break;
#endif /* CONFIG_ALTIVEC */
1005 1006 1007 1008 1009 1010 1011 1012 1013
		default:
			r = -EINVAL;
			break;
		}
	}

	return r;
}

1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025
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;
1026 1027 1028 1029 1030 1031 1032
	} 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;
1033 1034 1035 1036 1037 1038 1039
	} 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;
1040 1041 1042 1043 1044
#ifdef CONFIG_BOOKE
	} else if (vcpu->arch.epr_needed) {
		kvmppc_set_epr(vcpu, run->epr.epr);
		vcpu->arch.epr_needed = 0;
#endif
1045 1046
	}

1047
	r = kvmppc_vcpu_run(run, vcpu);
1048 1049 1050 1051 1052 1053 1054 1055 1056

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

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
1057
	if (irq->irq == KVM_INTERRUPT_UNSET) {
1058
		kvmppc_core_dequeue_external(vcpu);
1059 1060 1061 1062
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);
1063

1064
	kvm_vcpu_kick(vcpu);
1065

1066 1067 1068
	return 0;
}

1069 1070 1071 1072 1073 1074 1075 1076 1077
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) {
1078 1079 1080 1081
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
1082 1083 1084 1085
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_enabled = true;
		break;
1086 1087
	case KVM_CAP_PPC_EPR:
		r = 0;
1088 1089 1090 1091
		if (cap->args[0])
			vcpu->arch.epr_flags |= KVMPPC_EPR_USER;
		else
			vcpu->arch.epr_flags &= ~KVMPPC_EPR_USER;
1092
		break;
1093 1094 1095 1096 1097 1098
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_WATCHDOG:
		r = 0;
		vcpu->arch.watchdog_enabled = true;
		break;
#endif
1099
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1100 1101 1102 1103 1104 1105 1106 1107 1108 1109
	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
1110 1111 1112 1113
	}
#endif
#ifdef CONFIG_KVM_MPIC
	case KVM_CAP_IRQ_MPIC: {
A
Al Viro 已提交
1114
		struct fd f;
S
Scott Wood 已提交
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)
S
Scott Wood 已提交
1120 1121 1122
			break;

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

A
Al Viro 已提交
1127
		fdput(f);
S
Scott Wood 已提交
1128
		break;
S
Scott Wood 已提交
1129 1130
	}
#endif
1131 1132
#ifdef CONFIG_KVM_XICS
	case KVM_CAP_IRQ_XICS: {
A
Al Viro 已提交
1133
		struct fd f;
1134 1135 1136
		struct kvm_device *dev;

		r = -EBADF;
A
Al Viro 已提交
1137 1138
		f = fdget(cap->args[0]);
		if (!f.file)
1139 1140 1141
			break;

		r = -EPERM;
A
Al Viro 已提交
1142
		dev = kvm_device_from_filp(f.file);
1143 1144 1145
		if (dev)
			r = kvmppc_xics_connect_vcpu(dev, vcpu, cap->args[1]);

A
Al Viro 已提交
1146
		fdput(f);
1147 1148 1149
		break;
	}
#endif /* CONFIG_KVM_XICS */
1150 1151 1152 1153 1154
	default:
		r = -EINVAL;
		break;
	}

1155 1156 1157
	if (!r)
		r = kvmppc_sanity_check(vcpu);

1158 1159 1160
	return r;
}

1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179
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;

1180 1181
	switch (ioctl) {
	case KVM_INTERRUPT: {
1182 1183 1184
		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
1185
			goto out;
1186
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
1187
		goto out;
1188
	}
1189

1190 1191 1192 1193 1194 1195 1196 1197 1198
	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;
	}
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Scott Wood 已提交
1199

1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213
	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;
	}

1214
#if defined(CONFIG_KVM_E500V2) || defined(CONFIG_KVM_E500MC)
S
Scott Wood 已提交
1215 1216 1217 1218 1219 1220 1221 1222 1223
	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
1224 1225 1226 1227 1228 1229 1230 1231
	default:
		r = -EINVAL;
	}

out:
	return r;
}

1232 1233 1234 1235 1236
int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

1237 1238
static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
1239 1240 1241
	u32 inst_nop = 0x60000000;
#ifdef CONFIG_KVM_BOOKE_HV
	u32 inst_sc1 = 0x44000022;
1242 1243 1244 1245
	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);
1246
#else
1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260
	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
	 */
1261 1262 1263 1264
	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);
1265
#endif
1266

1267 1268
	pvinfo->flags = KVM_PPC_PVINFO_FLAGS_EV_IDLE;

1269 1270 1271
	return 0;
}

1272 1273 1274 1275 1276 1277 1278 1279 1280 1281 1282 1283
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;
}

1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299 1300 1301

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;
1302 1303
		if (!kvmppc_book3s_hcall_implemented(kvm, hcall))
			break;
1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319
		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;
}

1320 1321 1322
long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
1323
	struct kvm *kvm __maybe_unused = filp->private_data;
1324
	void __user *argp = (void __user *)arg;
1325 1326 1327
	long r;

	switch (ioctl) {
1328 1329
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
1330
		memset(&pvinfo, 0, sizeof(pvinfo));
1331 1332 1333 1334 1335 1336 1337 1338
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
1339 1340 1341 1342 1343 1344 1345 1346 1347
	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;
	}
1348
#ifdef CONFIG_PPC_BOOK3S_64
1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361
	case KVM_CREATE_SPAPR_TCE_64: {
		struct kvm_create_spapr_tce_64 create_tce_64;

		r = -EFAULT;
		if (copy_from_user(&create_tce_64, argp, sizeof(create_tce_64)))
			goto out;
		if (create_tce_64.flags) {
			r = -EINVAL;
			goto out;
		}
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
		goto out;
	}
1362 1363
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
1364
		struct kvm_create_spapr_tce_64 create_tce_64;
1365 1366 1367 1368

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
1369 1370 1371 1372 1373 1374 1375 1376

		create_tce_64.liobn = create_tce.liobn;
		create_tce_64.page_shift = IOMMU_PAGE_SHIFT_4K;
		create_tce_64.offset = 0;
		create_tce_64.size = create_tce.window_size >>
				IOMMU_PAGE_SHIFT_4K;
		create_tce_64.flags = 0;
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce_64);
1377 1378
		goto out;
	}
1379 1380
	case KVM_PPC_GET_SMMU_INFO: {
		struct kvm_ppc_smmu_info info;
1381
		struct kvm *kvm = filp->private_data;
1382 1383

		memset(&info, 0, sizeof(info));
1384
		r = kvm->arch.kvm_ops->get_smmu_info(kvm, &info);
1385 1386 1387 1388
		if (r >= 0 && copy_to_user(argp, &info, sizeof(info)))
			r = -EFAULT;
		break;
	}
1389 1390 1391 1392 1393 1394
	case KVM_PPC_RTAS_DEFINE_TOKEN: {
		struct kvm *kvm = filp->private_data;

		r = kvm_vm_ioctl_rtas_define_token(kvm, argp);
		break;
	}
1395 1396 1397 1398
	default: {
		struct kvm *kvm = filp->private_data;
		r = kvm->arch.kvm_ops->arch_vm_ioctl(filp, ioctl, arg);
	}
1399
#else /* CONFIG_PPC_BOOK3S_64 */
1400
	default:
1401
		r = -ENOTTY;
1402
#endif
1403
	}
1404
out:
1405 1406 1407
	return r;
}

1408 1409 1410 1411 1412 1413 1414 1415 1416 1417 1418 1419 1420 1421 1422 1423 1424
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;
}
1425
EXPORT_SYMBOL_GPL(kvmppc_alloc_lpid);
1426 1427 1428 1429 1430

void kvmppc_claim_lpid(long lpid)
{
	set_bit(lpid, lpid_inuse);
}
1431
EXPORT_SYMBOL_GPL(kvmppc_claim_lpid);
1432 1433 1434 1435 1436

void kvmppc_free_lpid(long lpid)
{
	clear_bit(lpid, lpid_inuse);
}
1437
EXPORT_SYMBOL_GPL(kvmppc_free_lpid);
1438 1439 1440 1441 1442 1443

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));
}
1444
EXPORT_SYMBOL_GPL(kvmppc_init_lpid);
1445

1446 1447 1448 1449 1450
int kvm_arch_init(void *opaque)
{
	return 0;
}

1451
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_ppc_instr);