[deliverable/linux.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/fs.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"

gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
	return gfn;
}

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

int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
{
	return !(v->arch.msr & MSR_WE);
}


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__,
		       vcpu->arch.last_inst);
		r = RESUME_HOST;
		break;
	default:
		BUG();
	}

	return r;
}

void kvm_arch_hardware_enable(void *garbage)
{
}

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();
}

struct kvm *kvm_arch_create_vm(void)
{
	struct kvm *kvm;

	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	if (!kvm)
		return ERR_PTR(-ENOMEM);

	return kvm;
}

static void kvmppc_free_vcpus(struct kvm *kvm)
{
	unsigned int i;

	for (i = 0; i < KVM_MAX_VCPUS; ++i) {
		if (kvm->vcpus[i]) {
			kvm_arch_vcpu_free(kvm->vcpus[i]);
			kvm->vcpus[i] = NULL;
		}
	}
}

void kvm_arch_destroy_vm(struct kvm *kvm)
{
	kvmppc_free_vcpus(kvm);
	kvm_free_physmem(kvm);
	kfree(kvm);
}

int kvm_dev_ioctl_check_extension(long ext)
{
	int r;

	switch (ext) {
	case KVM_CAP_COALESCED_MMIO:
		r = KVM_COALESCED_MMIO_PAGE_OFFSET;
		break;
	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_set_memory_region(struct kvm *kvm,
                               struct kvm_userspace_memory_region *mem,
                               struct kvm_memory_slot old,
                               int user_alloc)
{
	return 0;
}

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);
	kvmppc_create_vcpu_debugfs(vcpu, id);
	return vcpu;
}

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

int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
	setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
	            (unsigned long)vcpu);

	return 0;
}

void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
{
	kvmppc_core_destroy_mmu(vcpu);
}

void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
{
	if (vcpu->guest_debug.enabled)
		kvmppc_core_load_guest_debugstate(vcpu);

	kvmppc_core_vcpu_load(vcpu, cpu);
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
	if (vcpu->guest_debug.enabled)
		kvmppc_core_load_host_debugstate(vcpu);

	/* Don't leave guest TLB entries resident when being de-scheduled. */
	/* XXX It would be nice to differentiate between heavyweight exit and
	 * sched_out here, since we could avoid the TLB flush for heavyweight
	 * exits. */
	_tlbil_all();
	kvmppc_core_vcpu_put(vcpu);
}

int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
                                    struct kvm_debug_guest *dbg)
{
	int i;

	vcpu->guest_debug.enabled = dbg->enabled;
	if (vcpu->guest_debug.enabled) {
		for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) {
			if (dbg->breakpoints[i].enabled)
				vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
			else
				vcpu->guest_debug.bp[i] = 0;
		}
	}

	return 0;
}

static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
                                     struct kvm_run *run)
{
	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
	*gpr = run->dcr.data;
}

static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_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 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;
		}
	}
}

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;

	return EMULATE_DO_MMIO;
}

int kvmppc_handle_store(struct kvm_run *run, struct kvm_vcpu *vcpu,
                        u32 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 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;

	vcpu_load(vcpu);

	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;
	}

	kvmppc_core_deliver_interrupts(vcpu);

	local_irq_disable();
	kvm_guest_enter();
	r = __kvmppc_vcpu_run(run, vcpu);
	kvm_guest_exit();
	local_irq_enable();

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

	vcpu_put(vcpu);

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
	kvmppc_core_queue_external(vcpu, irq);

	if (waitqueue_active(&vcpu->wq)) {
		wake_up_interruptible(&vcpu->wq);
		vcpu->stat.halt_wakeup++;
	}

	return 0;
}

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);
		break;
	}
	default:
		r = -EINVAL;
	}

out:
	return r;
}

int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
	return -ENOTSUPP;
}

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

	switch (ioctl) {
	default:
		r = -EINVAL;
	}

	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>
	26	#include <linux/fs.h>
	27	#include <asm/cputable.h>
	28	#include <asm/uaccess.h>
	29	#include <asm/kvm_ppc.h>
83aae4a8	30	#include <asm/tlbflush.h>
73e75b41	31	#include "timing.h"
fad7b9b5	32	#include "../mm/mmu_decl.h"
bbf45ba5	33
bbf45ba5 HB	34	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
	35	{
	36	return gfn;
	37	}
	38
	39	int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
	40	{
45c5eb67	41	return !!(v->arch.pending_exceptions);
bbf45ba5 HB	42	}
	43
	44	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
	45	{
45c5eb67	46	return !(v->arch.msr & MSR_WE);
bbf45ba5 HB	47	}
	48
	49
	50	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	51	{
	52	enum emulation_result er;
	53	int r;
	54
	55	er = kvmppc_emulate_instruction(run, vcpu);
	56	switch (er) {
	57	case EMULATE_DONE:
	58	/* Future optimization: only reload non-volatiles if they were
	59	* actually modified. */
	60	r = RESUME_GUEST_NV;
	61	break;
	62	case EMULATE_DO_MMIO:
	63	run->exit_reason = KVM_EXIT_MMIO;
	64	/* We must reload nonvolatiles because "update" load/store
	65	* instructions modify register state. */
	66	/* Future optimization: only reload non-volatiles if they were
	67	* actually modified. */
	68	r = RESUME_HOST_NV;
	69	break;
	70	case EMULATE_FAIL:
	71	/* XXX Deliver Program interrupt to guest. */
	72	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
	73	vcpu->arch.last_inst);
	74	r = RESUME_HOST;
	75	break;
	76	default:
	77	BUG();
	78	}
	79
	80	return r;
	81	}
	82
	83	void kvm_arch_hardware_enable(void *garbage)
	84	{
	85	}
	86
	87	void kvm_arch_hardware_disable(void *garbage)
	88	{
	89	}
	90
	91	int kvm_arch_hardware_setup(void)
	92	{
	93	return 0;
	94	}
	95
	96	void kvm_arch_hardware_unsetup(void)
	97	{
	98	}
	99
	100	void kvm_arch_check_processor_compat(void *rtn)
	101	{
9dd921cf	102	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	103	}
	104
	105	struct kvm *kvm_arch_create_vm(void)
	106	{
	107	struct kvm *kvm;
	108
	109	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	110	if (!kvm)
	111	return ERR_PTR(-ENOMEM);
	112
	113	return kvm;
	114	}
	115
	116	static void kvmppc_free_vcpus(struct kvm *kvm)
	117	{
	118	unsigned int i;
	119
	120	for (i = 0; i < KVM_MAX_VCPUS; ++i) {
	121	if (kvm->vcpus[i]) {
	122	kvm_arch_vcpu_free(kvm->vcpus[i]);
	123	kvm->vcpus[i] = NULL;
	124	}
	125	}
	126	}
	127
	128	void kvm_arch_destroy_vm(struct kvm *kvm)
	129	{
	130	kvmppc_free_vcpus(kvm);
	131	kvm_free_physmem(kvm);
	132	kfree(kvm);
	133	}
	134
	135	int kvm_dev_ioctl_check_extension(long ext)
	136	{
	137	int r;
	138
	139	switch (ext) {
588968b6 LV	140	case KVM_CAP_COALESCED_MMIO:
	141	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	142	break;
bbf45ba5 HB	143	default:
	144	r = 0;
	145	break;
	146	}
	147	return r;
	148
	149	}
	150
	151	long kvm_arch_dev_ioctl(struct file *filp,
	152	unsigned int ioctl, unsigned long arg)
	153	{
	154	return -EINVAL;
	155	}
	156
	157	int kvm_arch_set_memory_region(struct kvm *kvm,
	158	struct kvm_userspace_memory_region *mem,
	159	struct kvm_memory_slot old,
	160	int user_alloc)
	161	{
	162	return 0;
	163	}
	164
34d4cb8f MT	165	void kvm_arch_flush_shadow(struct kvm *kvm)
	166	{
	167	}
	168
bbf45ba5 HB	169	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	170	{
73e75b41 HB	171	struct kvm_vcpu *vcpu;
	172	vcpu = kvmppc_core_vcpu_create(kvm, id);
	173	kvmppc_create_vcpu_debugfs(vcpu, id);
	174	return vcpu;
bbf45ba5 HB	175	}
	176
	177	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	178	{
73e75b41	179	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	180	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	181	}
	182
	183	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	184	{
	185	kvm_arch_vcpu_free(vcpu);
	186	}
	187
	188	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	189	{
9dd921cf	190	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	191	}
	192
	193	static void kvmppc_decrementer_func(unsigned long data)
	194	{
	195	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	196
9dd921cf	197	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	198
	199	if (waitqueue_active(&vcpu->wq)) {
	200	wake_up_interruptible(&vcpu->wq);
	201	vcpu->stat.halt_wakeup++;
	202	}
bbf45ba5 HB	203	}
	204
	205	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
	206	{
	207	setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
	208	(unsigned long)vcpu);
	209
	210	return 0;
	211	}
	212
	213	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	214	{
c30f8a6c	215	kvmppc_core_destroy_mmu(vcpu);
bbf45ba5 HB	216	}
	217
	218	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	219	{
6a0ab738	220	if (vcpu->guest_debug.enabled)
9dd921cf	221	kvmppc_core_load_guest_debugstate(vcpu);
83aae4a8	222
9dd921cf	223	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	224	}
	225
	226	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	227	{
6a0ab738	228	if (vcpu->guest_debug.enabled)
9dd921cf	229	kvmppc_core_load_host_debugstate(vcpu);
83aae4a8 HB	230
	231	/* Don't leave guest TLB entries resident when being de-scheduled. */
	232	/* XXX It would be nice to differentiate between heavyweight exit and
	233	* sched_out here, since we could avoid the TLB flush for heavyweight
	234	* exits. */
2a4aca11	235	_tlbil_all();
9dd921cf	236	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	237	}
bbf45ba5 HB	238
bbf45ba5 HB	239	int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
	240	struct kvm_debug_guest *dbg)
	241	{
6a0ab738 HB	242	int i;
	243
	244	vcpu->guest_debug.enabled = dbg->enabled;
	245	if (vcpu->guest_debug.enabled) {
	246	for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) {
	247	if (dbg->breakpoints[i].enabled)
	248	vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
	249	else
	250	vcpu->guest_debug.bp[i] = 0;
	251	}
	252	}
	253
	254	return 0;
bbf45ba5 HB	255	}
	256
	257	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	258	struct kvm_run *run)
	259	{
5cf8ca22	260	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	261	*gpr = run->dcr.data;
	262	}
	263
	264	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	265	struct kvm_run *run)
	266	{
5cf8ca22	267	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	268
	269	if (run->mmio.len > sizeof(*gpr)) {
	270	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	271	return;
	272	}
	273
	274	if (vcpu->arch.mmio_is_bigendian) {
	275	switch (run->mmio.len) {
	276	case 4: gpr = (u32 *)run->mmio.data; break;
	277	case 2: gpr = (u16 *)run->mmio.data; break;
	278	case 1: gpr = (u8 *)run->mmio.data; break;
	279	}
	280	} else {
	281	/* Convert BE data from userland back to LE. */
	282	switch (run->mmio.len) {
	283	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	284	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	285	case 1: gpr = (u8 *)run->mmio.data; break;
	286	}
	287	}
	288	}
	289
	290	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	291	unsigned int rt, unsigned int bytes, int is_bigendian)
	292	{
	293	if (bytes > sizeof(run->mmio.data)) {
	294	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	295	run->mmio.len);
	296	}
	297
	298	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	299	run->mmio.len = bytes;
	300	run->mmio.is_write = 0;
	301
	302	vcpu->arch.io_gpr = rt;
	303	vcpu->arch.mmio_is_bigendian = is_bigendian;
	304	vcpu->mmio_needed = 1;
	305	vcpu->mmio_is_write = 0;
	306
	307	return EMULATE_DO_MMIO;
	308	}
	309
	310	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	311	u32 val, unsigned int bytes, int is_bigendian)
	312	{
	313	void *data = run->mmio.data;
	314
	315	if (bytes > sizeof(run->mmio.data)) {
	316	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	317	run->mmio.len);
	318	}
	319
	320	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	321	run->mmio.len = bytes;
	322	run->mmio.is_write = 1;
	323	vcpu->mmio_needed = 1;
	324	vcpu->mmio_is_write = 1;
	325
	326	/* Store the value at the lowest bytes in 'data'. */
	327	if (is_bigendian) {
	328	switch (bytes) {
	329	case 4: (u32 )data = val; break;
	330	case 2: (u16 )data = val; break;
	331	case 1: (u8 )data = val; break;
332	}
333	} else {
334	/* Store LE value into 'data'. */
335	switch (bytes) {
336	case 4: st_le32(data, val); break;
337	case 2: st_le16(data, val); break;
338	case 1: (u8 )data = val; break;
339	}
340	}
341
342	return EMULATE_DO_MMIO;
343	}
344
345	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
346	{
347	int r;
348	sigset_t sigsaved;
349
45c5eb67 HB	350	vcpu_load(vcpu);
45c5eb67 HB	351
bbf45ba5 HB	352	if (vcpu->sigset_active)
	353	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	354
	355	if (vcpu->mmio_needed) {
	356	if (!vcpu->mmio_is_write)
	357	kvmppc_complete_mmio_load(vcpu, run);
	358	vcpu->mmio_needed = 0;
	359	} else if (vcpu->arch.dcr_needed) {
	360	if (!vcpu->arch.dcr_is_write)
	361	kvmppc_complete_dcr_load(vcpu, run);
	362	vcpu->arch.dcr_needed = 0;
	363	}
	364
9dd921cf	365	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	366
	367	local_irq_disable();
	368	kvm_guest_enter();
	369	r = __kvmppc_vcpu_run(run, vcpu);
	370	kvm_guest_exit();
	371	local_irq_enable();
	372
	373	if (vcpu->sigset_active)
	374	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	375
45c5eb67 HB	376	vcpu_put(vcpu);
45c5eb67 HB	377
bbf45ba5 HB	378	return r;
	379	}
	380
	381	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	382	{
9dd921cf	383	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	384
	385	if (waitqueue_active(&vcpu->wq)) {
	386	wake_up_interruptible(&vcpu->wq);
	387	vcpu->stat.halt_wakeup++;
	388	}
	389
bbf45ba5 HB	390	return 0;
	391	}
	392
	393	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	394	struct kvm_mp_state *mp_state)
	395	{
	396	return -EINVAL;
	397	}
	398
	399	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	400	struct kvm_mp_state *mp_state)
	401	{
	402	return -EINVAL;
	403	}
	404
	405	long kvm_arch_vcpu_ioctl(struct file *filp,
	406	unsigned int ioctl, unsigned long arg)
	407	{
	408	struct kvm_vcpu *vcpu = filp->private_data;
	409	void __user argp = (void __user )arg;
	410	long r;
	411
	412	switch (ioctl) {
	413	case KVM_INTERRUPT: {
	414	struct kvm_interrupt irq;
	415	r = -EFAULT;
	416	if (copy_from_user(&irq, argp, sizeof(irq)))
	417	goto out;
	418	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	419	break;
	420	}
	421	default:
	422	r = -EINVAL;
	423	}
	424
	425	out:
	426	return r;
	427	}
	428
	429	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	430	{
	431	return -ENOTSUPP;
	432	}
	433
	434	long kvm_arch_vm_ioctl(struct file *filp,
	435	unsigned int ioctl, unsigned long arg)
	436	{
	437	long r;
	438
	439	switch (ioctl) {
	440	default:
	441	r = -EINVAL;
	442	}
	443
	444	return r;
	445	}
	446
	447	int kvm_arch_init(void *opaque)
	448	{
	449	return 0;
	450	}
	451
	452	void kvm_arch_exit(void)
	453	{
454	}