/*
   * 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>

  #include <linux/hrtimer.h>

  #include <linux/fs.h>

  #include <linux/slab.h>

  #include <asm/cputable.h>
  #include <asm/uaccess.h>
  #include <asm/kvm_ppc.h>

  #include <asm/tlbflush.h>

  #include <asm/cputhreads.h>

  #include "timing.h"

  #include "../mm/mmu_decl.h"

  #define CREATE_TRACE_POINTS
  #include "trace.h"

  int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
  {

  	return !(v->arch.shared->msr & MSR_WE) ||
  	       !!(v->arch.pending_exceptions);

  }

  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) {

  	case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
  	{
  		vcpu->arch.magic_page_pa = param1;
  		vcpu->arch.magic_page_ea = param2;

  		r2 = KVM_MAGIC_FEAT_SR;

  		r = HC_EV_SUCCESS;
  		break;
  	}

  	case HC_VENDOR_KVM | KVM_HC_FEATURES:
  		r = HC_EV_SUCCESS;

  #if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
  		/* XXX Missing magic page on 44x */

  		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
  #endif

  
  		/* Second return value is in r4 */

  		break;
  	default:
  		r = HC_EV_UNIMPLEMENTED;
  		break;
  	}

  	kvmppc_set_gpr(vcpu, 4, r2);

  	return r;
  }

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

  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)
  ", __func__,

  		       kvmppc_get_last_inst(vcpu));

  		r = RESUME_HOST;
  		break;
  	default:
  		BUG();
  	}
  
  	return r;
  }

  int kvm_arch_hardware_enable(void *garbage)

  {

  	return 0;

  }
  
  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)
  {

  	*(int *)rtn = kvmppc_core_check_processor_compat();

  }

  int kvm_arch_init_vm(struct kvm *kvm)

  {

  	return kvmppc_core_init_vm(kvm);

  }

  void kvm_arch_destroy_vm(struct kvm *kvm)

  {
  	unsigned int i;

  	struct kvm_vcpu *vcpu;

  	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);

  
  	kvmppc_core_destroy_vm(kvm);

  	mutex_unlock(&kvm->lock);

  }

  void kvm_arch_sync_events(struct kvm *kvm)
  {
  }

  int kvm_dev_ioctl_check_extension(long ext)
  {
  	int r;
  
  	switch (ext) {

  #ifdef CONFIG_BOOKE
  	case KVM_CAP_PPC_BOOKE_SREGS:
  #else

  	case KVM_CAP_PPC_SEGSTATE:

  	case KVM_CAP_PPC_PAPR:

  #endif

  	case KVM_CAP_PPC_UNSET_IRQ:

  	case KVM_CAP_PPC_IRQ_LEVEL:

  	case KVM_CAP_ENABLE_CAP:

  		r = 1;
  		break;
  #ifndef CONFIG_KVM_BOOK3S_64_HV
  	case KVM_CAP_PPC_PAIRED_SINGLES:

  	case KVM_CAP_PPC_OSI:

  	case KVM_CAP_PPC_GET_PVINFO:

  		r = 1;
  		break;

  	case KVM_CAP_COALESCED_MMIO:
  		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
  		break;

  #endif

  #ifdef CONFIG_KVM_BOOK3S_64_HV
  	case KVM_CAP_SPAPR_TCE:
  		r = 1;
  		break;

  	case KVM_CAP_PPC_SMT:
  		r = threads_per_core;
  		break;

  	case KVM_CAP_PPC_RMA:
  		r = 1;

  		/* PPC970 requires an RMA */
  		if (cpu_has_feature(CPU_FTR_ARCH_201))
  			r = 2;

  		break;

  #endif

  	default:
  		r = 0;
  		break;
  	}
  	return r;
  
  }
  
  long kvm_arch_dev_ioctl(struct file *filp,
                          unsigned int ioctl, unsigned long arg)
  {
  	return -EINVAL;
  }

  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)

  {

  	return kvmppc_core_prepare_memory_region(kvm, mem);

  }

  void kvm_arch_commit_memory_region(struct kvm *kvm,
                 struct kvm_userspace_memory_region *mem,
                 struct kvm_memory_slot old,
                 int user_alloc)
  {

  	kvmppc_core_commit_memory_region(kvm, mem);

  }

  void kvm_arch_flush_shadow(struct kvm *kvm)
  {
  }

  struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
  {

  	struct kvm_vcpu *vcpu;
  	vcpu = kvmppc_core_vcpu_create(kvm, id);

  	vcpu->arch.wqp = &vcpu->wq;

  	if (!IS_ERR(vcpu))
  		kvmppc_create_vcpu_debugfs(vcpu, id);

  	return vcpu;

  }
  
  void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
  {

  	/* Make sure we're not using the vcpu anymore */
  	hrtimer_cancel(&vcpu->arch.dec_timer);
  	tasklet_kill(&vcpu->arch.tasklet);

  	kvmppc_remove_vcpu_debugfs(vcpu);

  	kvmppc_core_vcpu_free(vcpu);

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

  	return kvmppc_core_pending_dec(vcpu);

  }
  
  static void kvmppc_decrementer_func(unsigned long data)
  {
  	struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;

  	kvmppc_core_queue_dec(vcpu);

  	if (waitqueue_active(vcpu->arch.wqp)) {
  		wake_up_interruptible(vcpu->arch.wqp);

  		vcpu->stat.halt_wakeup++;
  	}

  }

  /*
   * 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;
  }

  int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
  {

  	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;

  	vcpu->arch.dec_expires = ~(u64)0;

  #ifdef CONFIG_KVM_EXIT_TIMING
  	mutex_init(&vcpu->arch.exit_timing_lock);
  #endif

  	return 0;
  }
  
  void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
  {

  	kvmppc_mmu_destroy(vcpu);

  }
  
  void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
  {

  #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

  	kvmppc_core_vcpu_load(vcpu, cpu);

  	vcpu->cpu = smp_processor_id();

  }
  
  void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
  {

  	kvmppc_core_vcpu_put(vcpu);

  #ifdef CONFIG_BOOKE
  	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
  #endif

  	vcpu->cpu = -1;

  }

  int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,

                                          struct kvm_guest_debug *dbg)

  {

  	return -EINVAL;

  }
  
  static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
                                       struct kvm_run *run)
  {

  	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);

  }
  
  static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                        struct kvm_run *run)
  {

  	u64 uninitialized_var(gpr);

  	if (run->mmio.len > sizeof(gpr)) {

  		printk(KERN_ERR "bad MMIO length: %d
  ", run->mmio.len);
  		return;
  	}
  
  	if (vcpu->arch.mmio_is_bigendian) {
  		switch (run->mmio.len) {

  		case 8: gpr = *(u64 *)run->mmio.data; break;

  		case 4: gpr = *(u32 *)run->mmio.data; break;
  		case 2: gpr = *(u16 *)run->mmio.data; break;
  		case 1: gpr = *(u8 *)run->mmio.data; break;

  		}
  	} else {
  		/* Convert BE data from userland back to LE. */
  		switch (run->mmio.len) {

  		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;

  		}
  	}

  	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;
  		}
  	}

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

  
  	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
  	case KVM_REG_GPR:
  		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
  		break;
  	case KVM_REG_FPR:
  		vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
  		break;

  #ifdef CONFIG_PPC_BOOK3S

  	case KVM_REG_QPR:
  		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
  		break;
  	case KVM_REG_FQPR:
  		vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
  		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
  		break;

  #endif

  	default:
  		BUG();
  	}

  }
  
  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
  ", __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;

  	vcpu->arch.mmio_sign_extend = 0;

  
  	return EMULATE_DO_MMIO;
  }

  /* 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;
  }

  int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,

                          u64 val, unsigned int bytes, int is_bigendian)

  {
  	void *data = run->mmio.data;
  
  	if (bytes > sizeof(run->mmio.data)) {
  		printk(KERN_ERR "%s: bad MMIO length: %d
  ", __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) {

  		case 8: *(u64 *)data = val; break;

  		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;

  	} 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;

  	} 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;

  	}

  	kvmppc_core_deliver_interrupts(vcpu);

  	r = kvmppc_vcpu_run(run, vcpu);

  
  	if (vcpu->sigset_active)
  		sigprocmask(SIG_SETMASK, &sigsaved, NULL);
  
  	return r;
  }
  
  int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
  {

  	if (irq->irq == KVM_INTERRUPT_UNSET) {

  		kvmppc_core_dequeue_external(vcpu, irq);

  		return 0;
  	}
  
  	kvmppc_core_queue_external(vcpu, irq);

  	if (waitqueue_active(vcpu->arch.wqp)) {
  		wake_up_interruptible(vcpu->arch.wqp);

  		vcpu->stat.halt_wakeup++;

  	} else if (vcpu->cpu != -1) {
  		smp_send_reschedule(vcpu->cpu);

  	}

  	return 0;
  }

  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) {

  	case KVM_CAP_PPC_OSI:
  		r = 0;
  		vcpu->arch.osi_enabled = true;
  		break;

  	case KVM_CAP_PPC_PAPR:
  		r = 0;
  		vcpu->arch.papr_enabled = true;
  		break;

  	default:
  		r = -EINVAL;
  		break;
  	}

  	if (!r)
  		r = kvmppc_sanity_check(vcpu);

  	return r;
  }

  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;

  	switch (ioctl) {
  	case KVM_INTERRUPT: {

  		struct kvm_interrupt irq;
  		r = -EFAULT;
  		if (copy_from_user(&irq, argp, sizeof(irq)))

  			goto out;

  		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);

  		goto out;

  	}

  	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;
  	}

  	default:
  		r = -EINVAL;
  	}
  
  out:
  	return r;
  }

  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;
  }

  long kvm_arch_vm_ioctl(struct file *filp,
                         unsigned int ioctl, unsigned long arg)
  {

  	void __user *argp = (void __user *)arg;

  	long r;
  
  	switch (ioctl) {

  	case KVM_PPC_GET_PVINFO: {
  		struct kvm_ppc_pvinfo pvinfo;

  		memset(&pvinfo, 0, sizeof(pvinfo));

  		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
  		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
  			r = -EFAULT;
  			goto out;
  		}
  
  		break;
  	}

  #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;
  	}

  
  	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;
  	}

  #endif /* CONFIG_KVM_BOOK3S_64_HV */

  	default:

  		r = -ENOTTY;

  	}

  out:

  	return r;
  }
  
  int kvm_arch_init(void *opaque)
  {
  	return 0;
  }
  
  void kvm_arch_exit(void)
  {
  }