[linux-2.6-block.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_interrupt_allowed(struct kvm_vcpu *vcpu)
{
	/* do real check here */
	return 1;
}

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_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
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	}
bbf45ba5 HB	43
78646121 GN	44	int kvm_arch_interrupt_allowed(struct kvm_vcpu *vcpu)
	45	{
	46	/* do real check here */
	47	return 1;
	48	}
	49
bbf45ba5 HB	50	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	51	{
45c5eb67	52	return !(v->arch.msr & MSR_WE);
bbf45ba5 HB	53	}
	54
	55
	56	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	57	{
	58	enum emulation_result er;
	59	int r;
	60
	61	er = kvmppc_emulate_instruction(run, vcpu);
	62	switch (er) {
	63	case EMULATE_DONE:
	64	/* Future optimization: only reload non-volatiles if they were
	65	* actually modified. */
	66	r = RESUME_GUEST_NV;
	67	break;
	68	case EMULATE_DO_MMIO:
	69	run->exit_reason = KVM_EXIT_MMIO;
	70	/* We must reload nonvolatiles because "update" load/store
	71	* instructions modify register state. */
	72	/* Future optimization: only reload non-volatiles if they were
	73	* actually modified. */
	74	r = RESUME_HOST_NV;
	75	break;
	76	case EMULATE_FAIL:
	77	/* XXX Deliver Program interrupt to guest. */
	78	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
	79	vcpu->arch.last_inst);
	80	r = RESUME_HOST;
	81	break;
	82	default:
	83	BUG();
	84	}
	85
	86	return r;
	87	}
	88
	89	void kvm_arch_hardware_enable(void *garbage)
	90	{
	91	}
	92
	93	void kvm_arch_hardware_disable(void *garbage)
	94	{
	95	}
	96
	97	int kvm_arch_hardware_setup(void)
	98	{
	99	return 0;
	100	}
	101
	102	void kvm_arch_hardware_unsetup(void)
	103	{
	104	}
	105
	106	void kvm_arch_check_processor_compat(void *rtn)
	107	{
9dd921cf	108	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	109	}
	110
	111	struct kvm *kvm_arch_create_vm(void)
	112	{
	113	struct kvm *kvm;
	114
	115	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	116	if (!kvm)
	117	return ERR_PTR(-ENOMEM);
	118
	119	return kvm;
	120	}
	121
	122	static void kvmppc_free_vcpus(struct kvm *kvm)
	123	{
	124	unsigned int i;
	125
	126	for (i = 0; i < KVM_MAX_VCPUS; ++i) {
	127	if (kvm->vcpus[i]) {
	128	kvm_arch_vcpu_free(kvm->vcpus[i]);
	129	kvm->vcpus[i] = NULL;
	130	}
	131	}
	132	}
	133
ad8ba2cd SY	134	void kvm_arch_sync_events(struct kvm *kvm)
	135	{
	136	}
	137
bbf45ba5 HB	138	void kvm_arch_destroy_vm(struct kvm *kvm)
	139	{
	140	kvmppc_free_vcpus(kvm);
	141	kvm_free_physmem(kvm);
	142	kfree(kvm);
	143	}
	144
	145	int kvm_dev_ioctl_check_extension(long ext)
	146	{
	147	int r;
	148
	149	switch (ext) {
588968b6 LV	150	case KVM_CAP_COALESCED_MMIO:
	151	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	152	break;
bbf45ba5 HB	153	default:
	154	r = 0;
	155	break;
	156	}
	157	return r;
	158
	159	}
	160
	161	long kvm_arch_dev_ioctl(struct file *filp,
	162	unsigned int ioctl, unsigned long arg)
	163	{
	164	return -EINVAL;
	165	}
	166
	167	int kvm_arch_set_memory_region(struct kvm *kvm,
	168	struct kvm_userspace_memory_region *mem,
	169	struct kvm_memory_slot old,
	170	int user_alloc)
	171	{
	172	return 0;
	173	}
	174
34d4cb8f MT	175	void kvm_arch_flush_shadow(struct kvm *kvm)
	176	{
	177	}
	178
bbf45ba5 HB	179	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	180	{
73e75b41 HB	181	struct kvm_vcpu *vcpu;
	182	vcpu = kvmppc_core_vcpu_create(kvm, id);
	183	kvmppc_create_vcpu_debugfs(vcpu, id);
	184	return vcpu;
bbf45ba5 HB	185	}
	186
	187	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	188	{
73e75b41	189	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	190	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	191	}
	192
	193	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	194	{
	195	kvm_arch_vcpu_free(vcpu);
	196	}
	197
	198	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	199	{
9dd921cf	200	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	201	}
	202
	203	static void kvmppc_decrementer_func(unsigned long data)
	204	{
	205	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	206
9dd921cf	207	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	208
	209	if (waitqueue_active(&vcpu->wq)) {
	210	wake_up_interruptible(&vcpu->wq);
	211	vcpu->stat.halt_wakeup++;
	212	}
bbf45ba5 HB	213	}
	214
	215	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
	216	{
	217	setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
	218	(unsigned long)vcpu);
	219
	220	return 0;
	221	}
	222
	223	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	224	{
ecc0981f	225	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	226	}
	227
	228	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	229	{
9dd921cf	230	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	231	}
	232
	233	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	234	{
9dd921cf	235	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	236	}
bbf45ba5 HB	237
d0bfb940	238	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	239	struct kvm_guest_debug *dbg)
bbf45ba5	240	{
f5d0906b	241	return -EINVAL;
bbf45ba5 HB	242	}
	243
	244	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	245	struct kvm_run *run)
	246	{
5cf8ca22	247	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	248	*gpr = run->dcr.data;
	249	}
	250
	251	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	252	struct kvm_run *run)
	253	{
5cf8ca22	254	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	255
	256	if (run->mmio.len > sizeof(*gpr)) {
	257	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	258	return;
	259	}
	260
	261	if (vcpu->arch.mmio_is_bigendian) {
	262	switch (run->mmio.len) {
	263	case 4: gpr = (u32 *)run->mmio.data; break;
	264	case 2: gpr = (u16 *)run->mmio.data; break;
	265	case 1: gpr = (u8 *)run->mmio.data; break;
	266	}
	267	} else {
	268	/* Convert BE data from userland back to LE. */
	269	switch (run->mmio.len) {
	270	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	271	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	272	case 1: gpr = (u8 *)run->mmio.data; break;
	273	}
	274	}
	275	}
	276
	277	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	278	unsigned int rt, unsigned int bytes, int is_bigendian)
	279	{
	280	if (bytes > sizeof(run->mmio.data)) {
	281	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	282	run->mmio.len);
	283	}
	284
	285	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	286	run->mmio.len = bytes;
	287	run->mmio.is_write = 0;
	288
	289	vcpu->arch.io_gpr = rt;
	290	vcpu->arch.mmio_is_bigendian = is_bigendian;
	291	vcpu->mmio_needed = 1;
	292	vcpu->mmio_is_write = 0;
	293
	294	return EMULATE_DO_MMIO;
	295	}
	296
	297	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	298	u32 val, unsigned int bytes, int is_bigendian)
	299	{
	300	void *data = run->mmio.data;
	301
	302	if (bytes > sizeof(run->mmio.data)) {
	303	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	304	run->mmio.len);
	305	}
	306
	307	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	308	run->mmio.len = bytes;
	309	run->mmio.is_write = 1;
	310	vcpu->mmio_needed = 1;
	311	vcpu->mmio_is_write = 1;
	312
	313	/* Store the value at the lowest bytes in 'data'. */
	314	if (is_bigendian) {
	315	switch (bytes) {
	316	case 4: (u32 )data = val; break;
	317	case 2: (u16 )data = val; break;
	318	case 1: (u8 )data = val; break;
319	}
320	} else {
321	/* Store LE value into 'data'. */
322	switch (bytes) {
323	case 4: st_le32(data, val); break;
324	case 2: st_le16(data, val); break;
325	case 1: (u8 )data = val; break;
326	}
327	}
328
329	return EMULATE_DO_MMIO;
330	}
331
332	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
333	{
334	int r;
335	sigset_t sigsaved;
336
45c5eb67 HB	337	vcpu_load(vcpu);
45c5eb67 HB	338
bbf45ba5 HB	339	if (vcpu->sigset_active)
	340	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	341
	342	if (vcpu->mmio_needed) {
	343	if (!vcpu->mmio_is_write)
	344	kvmppc_complete_mmio_load(vcpu, run);
	345	vcpu->mmio_needed = 0;
	346	} else if (vcpu->arch.dcr_needed) {
	347	if (!vcpu->arch.dcr_is_write)
	348	kvmppc_complete_dcr_load(vcpu, run);
	349	vcpu->arch.dcr_needed = 0;
	350	}
	351
9dd921cf	352	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	353
	354	local_irq_disable();
	355	kvm_guest_enter();
	356	r = __kvmppc_vcpu_run(run, vcpu);
	357	kvm_guest_exit();
	358	local_irq_enable();
	359
	360	if (vcpu->sigset_active)
	361	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	362
45c5eb67 HB	363	vcpu_put(vcpu);
45c5eb67 HB	364
bbf45ba5 HB	365	return r;
	366	}
	367
	368	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	369	{
9dd921cf	370	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	371
	372	if (waitqueue_active(&vcpu->wq)) {
	373	wake_up_interruptible(&vcpu->wq);
	374	vcpu->stat.halt_wakeup++;
	375	}
	376
bbf45ba5 HB	377	return 0;
	378	}
	379
	380	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	381	struct kvm_mp_state *mp_state)
	382	{
	383	return -EINVAL;
	384	}
	385
	386	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	387	struct kvm_mp_state *mp_state)
	388	{
	389	return -EINVAL;
	390	}
	391
	392	long kvm_arch_vcpu_ioctl(struct file *filp,
	393	unsigned int ioctl, unsigned long arg)
	394	{
	395	struct kvm_vcpu *vcpu = filp->private_data;
	396	void __user argp = (void __user )arg;
	397	long r;
	398
	399	switch (ioctl) {
	400	case KVM_INTERRUPT: {
	401	struct kvm_interrupt irq;
	402	r = -EFAULT;
	403	if (copy_from_user(&irq, argp, sizeof(irq)))
	404	goto out;
	405	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	406	break;
	407	}
	408	default:
	409	r = -EINVAL;
	410	}
	411
	412	out:
	413	return r;
	414	}
	415
	416	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	417	{
	418	return -ENOTSUPP;
	419	}
	420
	421	long kvm_arch_vm_ioctl(struct file *filp,
	422	unsigned int ioctl, unsigned long arg)
	423	{
	424	long r;
	425
	426	switch (ioctl) {
	427	default:
	428	r = -EINVAL;
	429	}
	430
	431	return r;
	432	}
	433
	434	int kvm_arch_init(void *opaque)
	435	{
	436	return 0;
	437	}
	438
	439	void kvm_arch_exit(void)
	440	{
441	}