[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>


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 r;

	if (strcmp(cur_cpu_spec->platform, "ppc440") == 0)
		r = 0;
	else
		r = -ENOTSUPP;

	*(int *)rtn = r;
}

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_USER_MEMORY:
		r = 1;
		break;
	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;
}

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

	vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	if (!vcpu) {
		err = -ENOMEM;
		goto out;
	}

	err = kvm_vcpu_init(vcpu, kvm, id);
	if (err)
		goto free_vcpu;

	return vcpu;

free_vcpu:
	kmem_cache_free(kvm_vcpu_cache, vcpu);
out:
	return ERR_PTR(err);
}

void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
	kvm_vcpu_uninit(vcpu);
	kmem_cache_free(kvm_vcpu_cache, 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)
{
	unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER];

	return test_bit(priority, &vcpu->arch.pending_exceptions);
}

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

	kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER);

	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)
{
}

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

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
}

int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
                                    struct kvm_debug_guest *dbg)
{
	return -ENOTSUPP;
}

static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
                                     struct kvm_run *run)
{
	u32 *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)
{
	u32 *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_check_and_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_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL);

	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>
	30
	31
	32	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
	33	{
	34	return gfn;
	35	}
	36
	37	int kvm_cpu_has_interrupt(struct kvm_vcpu *v)
	38	{
45c5eb67	39	return !!(v->arch.pending_exceptions);
bbf45ba5 HB	40	}
	41
	42	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
	43	{
45c5eb67	44	return !(v->arch.msr & MSR_WE);
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	{
	100	int r;
	101
	102	if (strcmp(cur_cpu_spec->platform, "ppc440") == 0)
	103	r = 0;
	104	else
	105	r = -ENOTSUPP;
	106
	107	(int )rtn = r;
	108	}
109
110	struct kvm *kvm_arch_create_vm(void)
111	{
112	struct kvm *kvm;
113
114	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
115	if (!kvm)
116	return ERR_PTR(-ENOMEM);
117
118	return kvm;
119	}
120
121	static void kvmppc_free_vcpus(struct kvm *kvm)
122	{
123	unsigned int i;
124
125	for (i = 0; i < KVM_MAX_VCPUS; ++i) {
126	if (kvm->vcpus[i]) {
127	kvm_arch_vcpu_free(kvm->vcpus[i]);
128	kvm->vcpus[i] = NULL;
129	}
130	}
131	}
132
133	void kvm_arch_destroy_vm(struct kvm *kvm)
134	{
135	kvmppc_free_vcpus(kvm);
136	kvm_free_physmem(kvm);
137	kfree(kvm);
138	}
139
140	int kvm_dev_ioctl_check_extension(long ext)
141	{
142	int r;
143
144	switch (ext) {
145	case KVM_CAP_USER_MEMORY:
146	r = 1;
147	break;
588968b6 LV	148	case KVM_CAP_COALESCED_MMIO:
	149	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	150	break;
bbf45ba5 HB	151	default:
	152	r = 0;
	153	break;
	154	}
	155	return r;
	156
	157	}
	158
	159	long kvm_arch_dev_ioctl(struct file *filp,
	160	unsigned int ioctl, unsigned long arg)
	161	{
	162	return -EINVAL;
	163	}
	164
	165	int kvm_arch_set_memory_region(struct kvm *kvm,
	166	struct kvm_userspace_memory_region *mem,
	167	struct kvm_memory_slot old,
	168	int user_alloc)
	169	{
	170	return 0;
	171	}
	172
	173	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
	174	{
	175	struct kvm_vcpu *vcpu;
	176	int err;
	177
	178	vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	179	if (!vcpu) {
	180	err = -ENOMEM;
	181	goto out;
	182	}
	183
	184	err = kvm_vcpu_init(vcpu, kvm, id);
	185	if (err)
	186	goto free_vcpu;
	187
	188	return vcpu;
	189
	190	free_vcpu:
	191	kmem_cache_free(kvm_vcpu_cache, vcpu);
	192	out:
	193	return ERR_PTR(err);
	194	}
	195
	196	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	197	{
	198	kvm_vcpu_uninit(vcpu);
	199	kmem_cache_free(kvm_vcpu_cache, vcpu);
	200	}
	201
	202	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	203	{
	204	kvm_arch_vcpu_free(vcpu);
	205	}
	206
	207	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	208	{
	209	unsigned int priority = exception_priority[BOOKE_INTERRUPT_DECREMENTER];
	210
	211	return test_bit(priority, &vcpu->arch.pending_exceptions);
	212	}
	213
	214	static void kvmppc_decrementer_func(unsigned long data)
215	{
216	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
217
218	kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_DECREMENTER);
45c5eb67 HB	219
	220	if (waitqueue_active(&vcpu->wq)) {
	221	wake_up_interruptible(&vcpu->wq);
	222	vcpu->stat.halt_wakeup++;
	223	}
bbf45ba5 HB	224	}
	225
	226	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
	227	{
	228	setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
	229	(unsigned long)vcpu);
	230
	231	return 0;
	232	}
	233
	234	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	235	{
	236	}
	237
	238	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	239	{
	240	}
	241
	242	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	243	{
	244	}
	245
bbf45ba5 HB	246	int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
	247	struct kvm_debug_guest *dbg)
	248	{
	249	return -ENOTSUPP;
	250	}
	251
	252	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	253	struct kvm_run *run)
	254	{
	255	u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
	256	*gpr = run->dcr.data;
	257	}
	258
	259	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	260	struct kvm_run *run)
	261	{
	262	u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
	263
	264	if (run->mmio.len > sizeof(*gpr)) {
	265	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	266	return;
	267	}
	268
	269	if (vcpu->arch.mmio_is_bigendian) {
	270	switch (run->mmio.len) {
	271	case 4: gpr = (u32 *)run->mmio.data; break;
	272	case 2: gpr = (u16 *)run->mmio.data; break;
	273	case 1: gpr = (u8 *)run->mmio.data; break;
	274	}
	275	} else {
	276	/* Convert BE data from userland back to LE. */
	277	switch (run->mmio.len) {
	278	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	279	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	280	case 1: gpr = (u8 *)run->mmio.data; break;
	281	}
	282	}
	283	}
	284
	285	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	286	unsigned int rt, unsigned int bytes, int is_bigendian)
	287	{
	288	if (bytes > sizeof(run->mmio.data)) {
	289	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	290	run->mmio.len);
	291	}
	292
	293	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	294	run->mmio.len = bytes;
	295	run->mmio.is_write = 0;
	296
	297	vcpu->arch.io_gpr = rt;
	298	vcpu->arch.mmio_is_bigendian = is_bigendian;
	299	vcpu->mmio_needed = 1;
	300	vcpu->mmio_is_write = 0;
	301
	302	return EMULATE_DO_MMIO;
	303	}
	304
	305	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	306	u32 val, unsigned int bytes, int is_bigendian)
	307	{
	308	void *data = run->mmio.data;
	309
310	if (bytes > sizeof(run->mmio.data)) {
311	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
312	run->mmio.len);
313	}
314
315	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
316	run->mmio.len = bytes;
317	run->mmio.is_write = 1;
318	vcpu->mmio_needed = 1;
319	vcpu->mmio_is_write = 1;
320
321	/* Store the value at the lowest bytes in 'data'. */
322	if (is_bigendian) {
323	switch (bytes) {
324	case 4: (u32 )data = val; break;
325	case 2: (u16 )data = val; break;
326	case 1: (u8 )data = val; break;
327	}
328	} else {
329	/* Store LE value into 'data'. */
330	switch (bytes) {
331	case 4: st_le32(data, val); break;
332	case 2: st_le16(data, val); break;
333	case 1: (u8 )data = val; break;
334	}
335	}
336
337	return EMULATE_DO_MMIO;
338	}
339
340	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
341	{
342	int r;
343	sigset_t sigsaved;
344
45c5eb67 HB	345	vcpu_load(vcpu);
45c5eb67 HB	346
bbf45ba5 HB	347	if (vcpu->sigset_active)
	348	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	349
	350	if (vcpu->mmio_needed) {
	351	if (!vcpu->mmio_is_write)
	352	kvmppc_complete_mmio_load(vcpu, run);
	353	vcpu->mmio_needed = 0;
	354	} else if (vcpu->arch.dcr_needed) {
	355	if (!vcpu->arch.dcr_is_write)
	356	kvmppc_complete_dcr_load(vcpu, run);
	357	vcpu->arch.dcr_needed = 0;
	358	}
	359
	360	kvmppc_check_and_deliver_interrupts(vcpu);
	361
	362	local_irq_disable();
	363	kvm_guest_enter();
	364	r = __kvmppc_vcpu_run(run, vcpu);
	365	kvm_guest_exit();
	366	local_irq_enable();
	367
	368	if (vcpu->sigset_active)
	369	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	370
45c5eb67 HB	371	vcpu_put(vcpu);
45c5eb67 HB	372
bbf45ba5 HB	373	return r;
	374	}
	375
	376	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	377	{
	378	kvmppc_queue_exception(vcpu, BOOKE_INTERRUPT_EXTERNAL);
45c5eb67 HB	379
	380	if (waitqueue_active(&vcpu->wq)) {
	381	wake_up_interruptible(&vcpu->wq);
	382	vcpu->stat.halt_wakeup++;
	383	}
	384
bbf45ba5 HB	385	return 0;
	386	}
	387
	388	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	389	struct kvm_mp_state *mp_state)
	390	{
	391	return -EINVAL;
	392	}
	393
	394	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	395	struct kvm_mp_state *mp_state)
	396	{
	397	return -EINVAL;
	398	}
	399
	400	long kvm_arch_vcpu_ioctl(struct file *filp,
	401	unsigned int ioctl, unsigned long arg)
	402	{
	403	struct kvm_vcpu *vcpu = filp->private_data;
	404	void __user argp = (void __user )arg;
	405	long r;
	406
	407	switch (ioctl) {
	408	case KVM_INTERRUPT: {
	409	struct kvm_interrupt irq;
	410	r = -EFAULT;
	411	if (copy_from_user(&irq, argp, sizeof(irq)))
	412	goto out;
	413	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	414	break;
	415	}
	416	default:
	417	r = -EINVAL;
	418	}
	419
	420	out:
	421	return r;
	422	}
	423
	424	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	425	{
	426	return -ENOTSUPP;
	427	}
	428
	429	long kvm_arch_vm_ioctl(struct file *filp,
	430	unsigned int ioctl, unsigned long arg)
	431	{
	432	long r;
	433
	434	switch (ioctl) {
	435	default:
	436	r = -EINVAL;
	437	}
	438
	439	return r;
	440	}
	441
	442	int kvm_arch_init(void *opaque)
	443	{
	444	return 0;
	445	}
	446
	447	void kvm_arch_exit(void)
	448	{
449	}