[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"

#define CREATE_TRACE_POINTS
#include "trace.h"

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

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


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;
	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);
	mutex_unlock(&kvm->lock);
}

void kvm_arch_sync_events(struct kvm *kvm)
{
}

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_mmu_destroy(vcpu);
}

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

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
	kvmppc_core_vcpu_put(vcpu);
}

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)
{
	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
46f43c6e MT	34	#define CREATE_TRACE_POINTS
	35	#include "trace.h"
	36
bbf45ba5 HB	37	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
	38	{
	39	return gfn;
	40	}
	41
bbf45ba5 HB	42	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	43	{
a1b37100	44	return !(v->arch.msr & MSR_WE) \|\| !!(v->arch.pending_exceptions);
bbf45ba5 HB	45	}
	46
	47
	48	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	49	{
	50	enum emulation_result er;
	51	int r;
	52
	53	er = kvmppc_emulate_instruction(run, vcpu);
	54	switch (er) {
	55	case EMULATE_DONE:
	56	/* Future optimization: only reload non-volatiles if they were
	57	* actually modified. */
	58	r = RESUME_GUEST_NV;
	59	break;
	60	case EMULATE_DO_MMIO:
	61	run->exit_reason = KVM_EXIT_MMIO;
	62	/* We must reload nonvolatiles because "update" load/store
	63	* instructions modify register state. */
	64	/* Future optimization: only reload non-volatiles if they were
	65	* actually modified. */
	66	r = RESUME_HOST_NV;
	67	break;
	68	case EMULATE_FAIL:
	69	/* XXX Deliver Program interrupt to guest. */
	70	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
	71	vcpu->arch.last_inst);
	72	r = RESUME_HOST;
	73	break;
	74	default:
	75	BUG();
	76	}
	77
	78	return r;
	79	}
	80
	81	void kvm_arch_hardware_enable(void *garbage)
	82	{
	83	}
	84
	85	void kvm_arch_hardware_disable(void *garbage)
	86	{
	87	}
	88
	89	int kvm_arch_hardware_setup(void)
	90	{
	91	return 0;
	92	}
	93
	94	void kvm_arch_hardware_unsetup(void)
	95	{
	96	}
	97
	98	void kvm_arch_check_processor_compat(void *rtn)
	99	{
9dd921cf	100	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	101	}
	102
	103	struct kvm *kvm_arch_create_vm(void)
	104	{
	105	struct kvm *kvm;
	106
	107	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	108	if (!kvm)
	109	return ERR_PTR(-ENOMEM);
	110
	111	return kvm;
	112	}
	113
	114	static void kvmppc_free_vcpus(struct kvm *kvm)
	115	{
	116	unsigned int i;
988a2cae	117	struct kvm_vcpu *vcpu;
bbf45ba5	118
988a2cae GN	119	kvm_for_each_vcpu(i, vcpu, kvm)
	120	kvm_arch_vcpu_free(vcpu);
	121
	122	mutex_lock(&kvm->lock);
	123	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	124	kvm->vcpus[i] = NULL;
	125
	126	atomic_set(&kvm->online_vcpus, 0);
	127	mutex_unlock(&kvm->lock);
bbf45ba5 HB	128	}
bbf45ba5 HB	129
ad8ba2cd SY	130	void kvm_arch_sync_events(struct kvm *kvm)
	131	{
	132	}
	133
bbf45ba5 HB	134	void kvm_arch_destroy_vm(struct kvm *kvm)
	135	{
	136	kvmppc_free_vcpus(kvm);
	137	kvm_free_physmem(kvm);
	138	kfree(kvm);
	139	}
	140
	141	int kvm_dev_ioctl_check_extension(long ext)
	142	{
	143	int r;
	144
	145	switch (ext) {
588968b6 LV	146	case KVM_CAP_COALESCED_MMIO:
	147	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	148	break;
bbf45ba5 HB	149	default:
	150	r = 0;
	151	break;
	152	}
	153	return r;
	154
	155	}
	156
	157	long kvm_arch_dev_ioctl(struct file *filp,
	158	unsigned int ioctl, unsigned long arg)
	159	{
	160	return -EINVAL;
	161	}
	162
	163	int kvm_arch_set_memory_region(struct kvm *kvm,
	164	struct kvm_userspace_memory_region *mem,
	165	struct kvm_memory_slot old,
	166	int user_alloc)
	167	{
	168	return 0;
	169	}
	170
34d4cb8f MT	171	void kvm_arch_flush_shadow(struct kvm *kvm)
	172	{
	173	}
	174
bbf45ba5 HB	175	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	176	{
73e75b41 HB	177	struct kvm_vcpu *vcpu;
	178	vcpu = kvmppc_core_vcpu_create(kvm, id);
	179	kvmppc_create_vcpu_debugfs(vcpu, id);
	180	return vcpu;
bbf45ba5 HB	181	}
	182
	183	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	184	{
73e75b41	185	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	186	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	187	}
	188
	189	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	190	{
	191	kvm_arch_vcpu_free(vcpu);
	192	}
	193
	194	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	195	{
9dd921cf	196	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	197	}
	198
	199	static void kvmppc_decrementer_func(unsigned long data)
	200	{
	201	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	202
9dd921cf	203	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	204
	205	if (waitqueue_active(&vcpu->wq)) {
	206	wake_up_interruptible(&vcpu->wq);
	207	vcpu->stat.halt_wakeup++;
	208	}
bbf45ba5 HB	209	}
	210
	211	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
	212	{
	213	setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
	214	(unsigned long)vcpu);
	215
	216	return 0;
	217	}
	218
	219	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	220	{
ecc0981f	221	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	222	}
	223
	224	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	225	{
9dd921cf	226	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	227	}
	228
	229	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	230	{
9dd921cf	231	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	232	}
bbf45ba5 HB	233
d0bfb940	234	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	235	struct kvm_guest_debug *dbg)
bbf45ba5	236	{
f5d0906b	237	return -EINVAL;
bbf45ba5 HB	238	}
	239
	240	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	241	struct kvm_run *run)
	242	{
5cf8ca22	243	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	244	*gpr = run->dcr.data;
	245	}
	246
	247	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	248	struct kvm_run *run)
	249	{
5cf8ca22	250	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	251
	252	if (run->mmio.len > sizeof(*gpr)) {
	253	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	254	return;
	255	}
	256
	257	if (vcpu->arch.mmio_is_bigendian) {
	258	switch (run->mmio.len) {
	259	case 4: gpr = (u32 *)run->mmio.data; break;
	260	case 2: gpr = (u16 *)run->mmio.data; break;
	261	case 1: gpr = (u8 *)run->mmio.data; break;
	262	}
	263	} else {
	264	/* Convert BE data from userland back to LE. */
	265	switch (run->mmio.len) {
	266	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	267	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	268	case 1: gpr = (u8 *)run->mmio.data; break;
	269	}
	270	}
	271	}
	272
	273	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	274	unsigned int rt, unsigned int bytes, int is_bigendian)
	275	{
	276	if (bytes > sizeof(run->mmio.data)) {
	277	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	278	run->mmio.len);
	279	}
	280
	281	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	282	run->mmio.len = bytes;
	283	run->mmio.is_write = 0;
	284
	285	vcpu->arch.io_gpr = rt;
	286	vcpu->arch.mmio_is_bigendian = is_bigendian;
	287	vcpu->mmio_needed = 1;
	288	vcpu->mmio_is_write = 0;
	289
	290	return EMULATE_DO_MMIO;
	291	}
	292
	293	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	294	u32 val, unsigned int bytes, int is_bigendian)
	295	{
	296	void *data = run->mmio.data;
	297
	298	if (bytes > sizeof(run->mmio.data)) {
	299	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	300	run->mmio.len);
	301	}
	302
	303	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	304	run->mmio.len = bytes;
	305	run->mmio.is_write = 1;
	306	vcpu->mmio_needed = 1;
	307	vcpu->mmio_is_write = 1;
	308
	309	/* Store the value at the lowest bytes in 'data'. */
	310	if (is_bigendian) {
	311	switch (bytes) {
	312	case 4: (u32 )data = val; break;
	313	case 2: (u16 )data = val; break;
	314	case 1: (u8 )data = val; break;
315	}
316	} else {
317	/* Store LE value into 'data'. */
318	switch (bytes) {
319	case 4: st_le32(data, val); break;
320	case 2: st_le16(data, val); break;
321	case 1: (u8 )data = val; break;
322	}
323	}
324
325	return EMULATE_DO_MMIO;
326	}
327
328	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
329	{
330	int r;
331	sigset_t sigsaved;
332
45c5eb67 HB	333	vcpu_load(vcpu);
45c5eb67 HB	334
bbf45ba5 HB	335	if (vcpu->sigset_active)
	336	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	337
	338	if (vcpu->mmio_needed) {
	339	if (!vcpu->mmio_is_write)
	340	kvmppc_complete_mmio_load(vcpu, run);
	341	vcpu->mmio_needed = 0;
	342	} else if (vcpu->arch.dcr_needed) {
	343	if (!vcpu->arch.dcr_is_write)
	344	kvmppc_complete_dcr_load(vcpu, run);
	345	vcpu->arch.dcr_needed = 0;
	346	}
	347
9dd921cf	348	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	349
	350	local_irq_disable();
	351	kvm_guest_enter();
	352	r = __kvmppc_vcpu_run(run, vcpu);
	353	kvm_guest_exit();
	354	local_irq_enable();
	355
	356	if (vcpu->sigset_active)
	357	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	358
45c5eb67 HB	359	vcpu_put(vcpu);
45c5eb67 HB	360
bbf45ba5 HB	361	return r;
	362	}
	363
	364	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	365	{
9dd921cf	366	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	367
	368	if (waitqueue_active(&vcpu->wq)) {
	369	wake_up_interruptible(&vcpu->wq);
	370	vcpu->stat.halt_wakeup++;
	371	}
	372
bbf45ba5 HB	373	return 0;
	374	}
	375
	376	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	377	struct kvm_mp_state *mp_state)
	378	{
	379	return -EINVAL;
	380	}
	381
	382	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	383	struct kvm_mp_state *mp_state)
	384	{
	385	return -EINVAL;
	386	}
	387
	388	long kvm_arch_vcpu_ioctl(struct file *filp,
	389	unsigned int ioctl, unsigned long arg)
	390	{
	391	struct kvm_vcpu *vcpu = filp->private_data;
	392	void __user argp = (void __user )arg;
	393	long r;
	394
	395	switch (ioctl) {
	396	case KVM_INTERRUPT: {
	397	struct kvm_interrupt irq;
	398	r = -EFAULT;
	399	if (copy_from_user(&irq, argp, sizeof(irq)))
	400	goto out;
	401	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	402	break;
	403	}
	404	default:
	405	r = -EINVAL;
	406	}
	407
	408	out:
	409	return r;
	410	}
	411
	412	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	413	{
	414	return -ENOTSUPP;
	415	}
	416
	417	long kvm_arch_vm_ioctl(struct file *filp,
	418	unsigned int ioctl, unsigned long arg)
	419	{
	420	long r;
	421
	422	switch (ioctl) {
	423	default:
	424	r = -EINVAL;
	425	}
	426
	427	return r;
	428	}
	429
	430	int kvm_arch_init(void *opaque)
	431	{
	432	return 0;
	433	}
	434
	435	void kvm_arch_exit(void)
	436	{
437	}