[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / kvm / powerpc.c

/*
 * 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/module.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 "timing.h"
#include "../mm/mmu_decl.h"

#define CREATE_TRACE_POINTS
#include "trace.h"

int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
#ifndef CONFIG_KVM_BOOK3S_64_HV
	return !(v->arch.shared->msr & MSR_WE) ||
	       !!(v->arch.pending_exceptions);
#else
	return 1;
#endif
}

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_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__,
		       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:
#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
	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);
	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->wq)) {
		wake_up_interruptible(&vcpu->wq);
		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\n", 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\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;
	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\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) {
		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);
	else
		kvmppc_core_queue_external(vcpu, irq);

	if (waitqueue_active(&vcpu->wq)) {
		wake_up_interruptible(&vcpu->wq);
		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;
	default:
		r = -EINVAL;
		break;
	}

	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;
	}
	default:
		r = -ENOTTY;
	}

out:
	return r;
}

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

void kvm_arch_exit(void)
{
}
Commit	Line	Data
bbf45ba5 HB	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright IBM Corp. 2007
	16	*
	17	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	18	* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
	19	*/
	20
	21	#include <linux/errno.h>
	22	#include <linux/err.h>
	23	#include <linux/kvm_host.h>
	24	#include <linux/module.h>
	25	#include <linux/vmalloc.h>
544c6761	26	#include <linux/hrtimer.h>
bbf45ba5	27	#include <linux/fs.h>
5a0e3ad6	28	#include <linux/slab.h>
bbf45ba5 HB	29	#include <asm/cputable.h>
	30	#include <asm/uaccess.h>
	31	#include <asm/kvm_ppc.h>
83aae4a8	32	#include <asm/tlbflush.h>
73e75b41	33	#include "timing.h"
fad7b9b5	34	#include "../mm/mmu_decl.h"
bbf45ba5	35
46f43c6e MT	36	#define CREATE_TRACE_POINTS
	37	#include "trace.h"
	38
bbf45ba5 HB	39	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	40	{
de56a948	41	#ifndef CONFIG_KVM_BOOK3S_64_HV
666e7252 AG	42	return !(v->arch.shared->msr & MSR_WE) \|\|
666e7252 AG	43	!!(v->arch.pending_exceptions);
de56a948 PM	44	#else
	45	return 1;
	46	#endif
bbf45ba5 HB	47	}
bbf45ba5 HB	48
2a342ed5 AG	49	int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
	50	{
	51	int nr = kvmppc_get_gpr(vcpu, 11);
	52	int r;
	53	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	54	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	55	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	56	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	57	unsigned long r2 = 0;
	58
	59	if (!(vcpu->arch.shared->msr & MSR_SF)) {
	60	/* 32 bit mode */
	61	param1 &= 0xffffffff;
	62	param2 &= 0xffffffff;
	63	param3 &= 0xffffffff;
	64	param4 &= 0xffffffff;
	65	}
	66
	67	switch (nr) {
5fc87407 AG	68	case HC_VENDOR_KVM \| KVM_HC_PPC_MAP_MAGIC_PAGE:
	69	{
	70	vcpu->arch.magic_page_pa = param1;
	71	vcpu->arch.magic_page_ea = param2;
	72
df1bfa25	73	r2 = KVM_MAGIC_FEAT_SR;
7508e16c	74
5fc87407 AG	75	r = HC_EV_SUCCESS;
	76	break;
	77	}
2a342ed5 AG	78	case HC_VENDOR_KVM \| KVM_HC_FEATURES:
2a342ed5 AG	79	r = HC_EV_SUCCESS;
a4cd8b23 SW	80	#if defined(CONFIG_PPC_BOOK3S) \|\| defined(CONFIG_KVM_E500)
a4cd8b23 SW	81	/* XXX Missing magic page on 44x */
5fc87407 AG	82	r2 \|= (1 << KVM_FEATURE_MAGIC_PAGE);
5fc87407 AG	83	#endif
2a342ed5 AG	84
2a342ed5 AG	85	/* Second return value is in r4 */
2a342ed5 AG	86	break;
	87	default:
	88	r = HC_EV_UNIMPLEMENTED;
	89	break;
	90	}
	91
7508e16c AG	92	kvmppc_set_gpr(vcpu, 4, r2);
7508e16c AG	93
2a342ed5 AG	94	return r;
2a342ed5 AG	95	}
bbf45ba5 HB	96
	97	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	98	{
	99	enum emulation_result er;
	100	int r;
	101
	102	er = kvmppc_emulate_instruction(run, vcpu);
	103	switch (er) {
	104	case EMULATE_DONE:
	105	/* Future optimization: only reload non-volatiles if they were
	106	* actually modified. */
	107	r = RESUME_GUEST_NV;
	108	break;
	109	case EMULATE_DO_MMIO:
	110	run->exit_reason = KVM_EXIT_MMIO;
	111	/* We must reload nonvolatiles because "update" load/store
	112	* instructions modify register state. */
	113	/* Future optimization: only reload non-volatiles if they were
	114	* actually modified. */
	115	r = RESUME_HOST_NV;
	116	break;
	117	case EMULATE_FAIL:
	118	/* XXX Deliver Program interrupt to guest. */
	119	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	120	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	121	r = RESUME_HOST;
	122	break;
	123	default:
	124	BUG();
	125	}
	126
	127	return r;
	128	}
	129
10474ae8	130	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	131	{
10474ae8	132	return 0;
bbf45ba5 HB	133	}
	134
	135	void kvm_arch_hardware_disable(void *garbage)
	136	{
	137	}
	138
	139	int kvm_arch_hardware_setup(void)
	140	{
	141	return 0;
	142	}
	143
	144	void kvm_arch_hardware_unsetup(void)
	145	{
	146	}
	147
	148	void kvm_arch_check_processor_compat(void *rtn)
	149	{
9dd921cf	150	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	151	}
bbf45ba5 HB	152
d89f5eff	153	int kvm_arch_init_vm(struct kvm *kvm)
bbf45ba5	154	{
f9e0554d	155	return kvmppc_core_init_vm(kvm);
bbf45ba5 HB	156	}
bbf45ba5 HB	157
d89f5eff	158	void kvm_arch_destroy_vm(struct kvm *kvm)
bbf45ba5 HB	159	{
bbf45ba5 HB	160	unsigned int i;
988a2cae	161	struct kvm_vcpu *vcpu;
bbf45ba5	162
988a2cae GN	163	kvm_for_each_vcpu(i, vcpu, kvm)
	164	kvm_arch_vcpu_free(vcpu);
	165
	166	mutex_lock(&kvm->lock);
	167	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	168	kvm->vcpus[i] = NULL;
	169
	170	atomic_set(&kvm->online_vcpus, 0);
f9e0554d PM	171
	172	kvmppc_core_destroy_vm(kvm);
	173
988a2cae	174	mutex_unlock(&kvm->lock);
bbf45ba5 HB	175	}
bbf45ba5 HB	176
ad8ba2cd SY	177	void kvm_arch_sync_events(struct kvm *kvm)
	178	{
	179	}
	180
bbf45ba5 HB	181	int kvm_dev_ioctl_check_extension(long ext)
	182	{
	183	int r;
	184
	185	switch (ext) {
5ce941ee SW	186	#ifdef CONFIG_BOOKE
	187	case KVM_CAP_PPC_BOOKE_SREGS:
	188	#else
e15a1137	189	case KVM_CAP_PPC_SEGSTATE:
5ce941ee	190	#endif
18978768	191	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	192	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	193	case KVM_CAP_ENABLE_CAP:
de56a948 PM	194	r = 1;
	195	break;
	196	#ifndef CONFIG_KVM_BOOK3S_64_HV
	197	case KVM_CAP_PPC_PAIRED_SINGLES:
ad0a048b	198	case KVM_CAP_PPC_OSI:
15711e9c	199	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	200	r = 1;
e15a1137 AG	201	break;
588968b6 LV	202	case KVM_CAP_COALESCED_MMIO:
	203	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	204	break;
de56a948	205	#endif
bbf45ba5 HB	206	default:
	207	r = 0;
	208	break;
	209	}
	210	return r;
	211
	212	}
	213
	214	long kvm_arch_dev_ioctl(struct file *filp,
	215	unsigned int ioctl, unsigned long arg)
	216	{
	217	return -EINVAL;
	218	}
	219
f7784b8e MT	220	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	221	struct kvm_memory_slot *memslot,
	222	struct kvm_memory_slot old,
	223	struct kvm_userspace_memory_region *mem,
	224	int user_alloc)
bbf45ba5	225	{
f9e0554d	226	return kvmppc_core_prepare_memory_region(kvm, mem);
bbf45ba5 HB	227	}
bbf45ba5 HB	228
f7784b8e MT	229	void kvm_arch_commit_memory_region(struct kvm *kvm,
	230	struct kvm_userspace_memory_region *mem,
	231	struct kvm_memory_slot old,
	232	int user_alloc)
	233	{
f9e0554d	234	kvmppc_core_commit_memory_region(kvm, mem);
f7784b8e MT	235	}
	236
	237
34d4cb8f MT	238	void kvm_arch_flush_shadow(struct kvm *kvm)
	239	{
	240	}
	241
bbf45ba5 HB	242	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	243	{
73e75b41 HB	244	struct kvm_vcpu *vcpu;
73e75b41 HB	245	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	246	if (!IS_ERR(vcpu))
06056bfb WY	247	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	248	return vcpu;
bbf45ba5 HB	249	}
	250
	251	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	252	{
a595405d AG	253	/* Make sure we're not using the vcpu anymore */
	254	hrtimer_cancel(&vcpu->arch.dec_timer);
	255	tasklet_kill(&vcpu->arch.tasklet);
	256
73e75b41	257	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	258	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	259	}
	260
	261	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	262	{
	263	kvm_arch_vcpu_free(vcpu);
	264	}
	265
	266	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	267	{
9dd921cf	268	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	269	}
	270
	271	static void kvmppc_decrementer_func(unsigned long data)
	272	{
	273	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	274
9dd921cf	275	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	276
	277	if (waitqueue_active(&vcpu->wq)) {
	278	wake_up_interruptible(&vcpu->wq);
	279	vcpu->stat.halt_wakeup++;
	280	}
bbf45ba5 HB	281	}
bbf45ba5 HB	282
544c6761 AG	283	/*
	284	* low level hrtimer wake routine. Because this runs in hardirq context
	285	* we schedule a tasklet to do the real work.
	286	*/
	287	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	288	{
	289	struct kvm_vcpu *vcpu;
	290
	291	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	292	tasklet_schedule(&vcpu->arch.tasklet);
	293
	294	return HRTIMER_NORESTART;
	295	}
	296
bbf45ba5 HB	297	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	298	{
544c6761 AG	299	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	300	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	301	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
de56a948	302	vcpu->arch.dec_expires = ~(u64)0;
bbf45ba5	303
09000adb BB	304	#ifdef CONFIG_KVM_EXIT_TIMING
	305	mutex_init(&vcpu->arch.exit_timing_lock);
	306	#endif
	307
bbf45ba5 HB	308	return 0;
	309	}
	310
	311	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	312	{
ecc0981f	313	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	314	}
	315
	316	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	317	{
eab17672 SW	318	#ifdef CONFIG_BOOKE
	319	/*
	320	* vrsave (formerly usprg0) isn't used by Linux, but may
	321	* be used by the guest.
	322	*
	323	* On non-booke this is associated with Altivec and
	324	* is handled by code in book3s.c.
	325	*/
	326	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	327	#endif
9dd921cf	328	kvmppc_core_vcpu_load(vcpu, cpu);
de56a948	329	vcpu->cpu = smp_processor_id();
bbf45ba5 HB	330	}
	331
	332	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	333	{
9dd921cf	334	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	335	#ifdef CONFIG_BOOKE
	336	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	337	#endif
de56a948	338	vcpu->cpu = -1;
bbf45ba5 HB	339	}
bbf45ba5 HB	340
d0bfb940	341	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	342	struct kvm_guest_debug *dbg)
bbf45ba5	343	{
f5d0906b	344	return -EINVAL;
bbf45ba5 HB	345	}
	346
	347	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	348	struct kvm_run *run)
	349	{
8e5b26b5	350	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	351	}
	352
	353	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	354	struct kvm_run *run)
	355	{
69b61833	356	u64 uninitialized_var(gpr);
bbf45ba5	357
8e5b26b5	358	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	359	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	360	return;
	361	}
	362
	363	if (vcpu->arch.mmio_is_bigendian) {
	364	switch (run->mmio.len) {
b104d066	365	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	366	case 4: gpr = (u32 )run->mmio.data; break;
	367	case 2: gpr = (u16 )run->mmio.data; break;
	368	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	369	}
	370	} else {
	371	/* Convert BE data from userland back to LE. */
	372	switch (run->mmio.len) {
8e5b26b5 AG	373	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	374	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	375	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	376	}
bbf45ba5 HB	377	}
8e5b26b5	378
3587d534 AG	379	if (vcpu->arch.mmio_sign_extend) {
	380	switch (run->mmio.len) {
	381	#ifdef CONFIG_PPC64
	382	case 4:
	383	gpr = (s64)(s32)gpr;
	384	break;
	385	#endif
	386	case 2:
	387	gpr = (s64)(s16)gpr;
	388	break;
	389	case 1:
	390	gpr = (s64)(s8)gpr;
	391	break;
	392	}
	393	}
	394
8e5b26b5	395	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	396
	397	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	398	case KVM_REG_GPR:
	399	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	400	break;
	401	case KVM_REG_FPR:
	402	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	403	break;
287d5611	404	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	405	case KVM_REG_QPR:
	406	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	407	break;
	408	case KVM_REG_FQPR:
	409	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	410	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	411	break;
287d5611	412	#endif
b104d066 AG	413	default:
	414	BUG();
	415	}
bbf45ba5 HB	416	}
	417
	418	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	419	unsigned int rt, unsigned int bytes, int is_bigendian)
	420	{
	421	if (bytes > sizeof(run->mmio.data)) {
	422	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	423	run->mmio.len);
	424	}
	425
	426	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	427	run->mmio.len = bytes;
	428	run->mmio.is_write = 0;
	429
	430	vcpu->arch.io_gpr = rt;
	431	vcpu->arch.mmio_is_bigendian = is_bigendian;
	432	vcpu->mmio_needed = 1;
	433	vcpu->mmio_is_write = 0;
3587d534	434	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	435
	436	return EMULATE_DO_MMIO;
	437	}
	438
3587d534 AG	439	/* Same as above, but sign extends */
	440	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	441	unsigned int rt, unsigned int bytes, int is_bigendian)
	442	{
	443	int r;
	444
	445	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	446	vcpu->arch.mmio_sign_extend = 1;
	447
	448	return r;
	449	}
	450
bbf45ba5	451	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	452	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	453	{
	454	void *data = run->mmio.data;
	455
	456	if (bytes > sizeof(run->mmio.data)) {
	457	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	458	run->mmio.len);
	459	}
	460
	461	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	462	run->mmio.len = bytes;
	463	run->mmio.is_write = 1;
	464	vcpu->mmio_needed = 1;
	465	vcpu->mmio_is_write = 1;
	466
	467	/* Store the value at the lowest bytes in 'data'. */
	468	if (is_bigendian) {
	469	switch (bytes) {
b104d066	470	case 8: (u64 )data = val; break;
bbf45ba5 HB	471	case 4: (u32 )data = val; break;
	472	case 2: (u16 )data = val; break;
	473	case 1: (u8 )data = val; break;
	474	}
	475	} else {
	476	/* Store LE value into 'data'. */
	477	switch (bytes) {
	478	case 4: st_le32(data, val); break;
	479	case 2: st_le16(data, val); break;
	480	case 1: (u8 )data = val; break;
	481	}
	482	}
	483
	484	return EMULATE_DO_MMIO;
	485	}
	486
	487	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	488	{
	489	int r;
	490	sigset_t sigsaved;
	491
	492	if (vcpu->sigset_active)
	493	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	494
	495	if (vcpu->mmio_needed) {
	496	if (!vcpu->mmio_is_write)
	497	kvmppc_complete_mmio_load(vcpu, run);
	498	vcpu->mmio_needed = 0;
	499	} else if (vcpu->arch.dcr_needed) {
	500	if (!vcpu->arch.dcr_is_write)
	501	kvmppc_complete_dcr_load(vcpu, run);
	502	vcpu->arch.dcr_needed = 0;
ad0a048b AG	503	} else if (vcpu->arch.osi_needed) {
	504	u64 *gprs = run->osi.gprs;
	505	int i;
	506
	507	for (i = 0; i < 32; i++)
	508	kvmppc_set_gpr(vcpu, i, gprs[i]);
	509	vcpu->arch.osi_needed = 0;
de56a948 PM	510	} else if (vcpu->arch.hcall_needed) {
	511	int i;
	512
	513	kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
	514	for (i = 0; i < 9; ++i)
	515	kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
	516	vcpu->arch.hcall_needed = 0;
bbf45ba5 HB	517	}
bbf45ba5 HB	518
9dd921cf	519	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	520
df6909e5	521	r = kvmppc_vcpu_run(run, vcpu);
bbf45ba5 HB	522
	523	if (vcpu->sigset_active)
	524	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	525
	526	return r;
	527	}
	528
	529	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	530	{
18978768 AG	531	if (irq->irq == KVM_INTERRUPT_UNSET)
	532	kvmppc_core_dequeue_external(vcpu, irq);
	533	else
	534	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	535
	536	if (waitqueue_active(&vcpu->wq)) {
	537	wake_up_interruptible(&vcpu->wq);
	538	vcpu->stat.halt_wakeup++;
de56a948 PM	539	} else if (vcpu->cpu != -1) {
de56a948 PM	540	smp_send_reschedule(vcpu->cpu);
45c5eb67 HB	541	}
45c5eb67 HB	542
bbf45ba5 HB	543	return 0;
	544	}
	545
71fbfd5f AG	546	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	547	struct kvm_enable_cap *cap)
	548	{
	549	int r;
	550
	551	if (cap->flags)
	552	return -EINVAL;
	553
	554	switch (cap->cap) {
ad0a048b AG	555	case KVM_CAP_PPC_OSI:
	556	r = 0;
	557	vcpu->arch.osi_enabled = true;
	558	break;
71fbfd5f AG	559	default:
	560	r = -EINVAL;
	561	break;
	562	}
	563
	564	return r;
	565	}
	566
bbf45ba5 HB	567	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	568	struct kvm_mp_state *mp_state)
	569	{
	570	return -EINVAL;
	571	}
	572
	573	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	574	struct kvm_mp_state *mp_state)
	575	{
	576	return -EINVAL;
	577	}
	578
	579	long kvm_arch_vcpu_ioctl(struct file *filp,
	580	unsigned int ioctl, unsigned long arg)
	581	{
	582	struct kvm_vcpu *vcpu = filp->private_data;
	583	void __user argp = (void __user )arg;
	584	long r;
	585
93736624 AK	586	switch (ioctl) {
93736624 AK	587	case KVM_INTERRUPT: {
bbf45ba5 HB	588	struct kvm_interrupt irq;
	589	r = -EFAULT;
	590	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	591	goto out;
bbf45ba5	592	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	593	goto out;
bbf45ba5	594	}
19483d14	595
71fbfd5f AG	596	case KVM_ENABLE_CAP:
	597	{
	598	struct kvm_enable_cap cap;
	599	r = -EFAULT;
	600	if (copy_from_user(&cap, argp, sizeof(cap)))
	601	goto out;
	602	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	603	break;
	604	}
bbf45ba5 HB	605	default:
	606	r = -EINVAL;
	607	}
	608
	609	out:
	610	return r;
	611	}
	612
15711e9c AG	613	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	614	{
	615	u32 inst_lis = 0x3c000000;
	616	u32 inst_ori = 0x60000000;
	617	u32 inst_nop = 0x60000000;
	618	u32 inst_sc = 0x44000002;
	619	u32 inst_imm_mask = 0xffff;
	620
	621	/*
	622	* The hypercall to get into KVM from within guest context is as
	623	* follows:
	624	*
	625	* lis r0, r0, KVM_SC_MAGIC_R0@h
	626	* ori r0, KVM_SC_MAGIC_R0@l
	627	* sc
	628	* nop
	629	*/
	630	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	631	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	632	pvinfo->hcall[2] = inst_sc;
	633	pvinfo->hcall[3] = inst_nop;
	634
	635	return 0;
	636	}
	637
bbf45ba5 HB	638	long kvm_arch_vm_ioctl(struct file *filp,
	639	unsigned int ioctl, unsigned long arg)
	640	{
15711e9c	641	void __user argp = (void __user )arg;
bbf45ba5 HB	642	long r;
	643
	644	switch (ioctl) {
15711e9c AG	645	case KVM_PPC_GET_PVINFO: {
15711e9c AG	646	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	647	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	648	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	649	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	650	r = -EFAULT;
	651	goto out;
	652	}
	653
	654	break;
	655	}
bbf45ba5	656	default:
367e1319	657	r = -ENOTTY;
bbf45ba5 HB	658	}
bbf45ba5 HB	659
15711e9c	660	out:
bbf45ba5 HB	661	return r;
	662	}
	663
	664	int kvm_arch_init(void *opaque)
	665	{
	666	return 0;
	667	}
	668
	669	void kvm_arch_exit(void)
	670	{
	671	}