[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 "../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_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;
}

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;
	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)
{
	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)
{
	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_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>
fad7b9b5	31	#include "../mm/mmu_decl.h"
bbf45ba5 HB	32
	33
	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) {
	140	case KVM_CAP_USER_MEMORY:
	141	r = 1;
	142	break;
588968b6 LV	143	case KVM_CAP_COALESCED_MMIO:
	144	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	145	break;
bbf45ba5 HB	146	default:
	147	r = 0;
	148	break;
	149	}
	150	return r;
	151
	152	}
	153
	154	long kvm_arch_dev_ioctl(struct file *filp,
	155	unsigned int ioctl, unsigned long arg)
	156	{
	157	return -EINVAL;
	158	}
	159
	160	int kvm_arch_set_memory_region(struct kvm *kvm,
	161	struct kvm_userspace_memory_region *mem,
	162	struct kvm_memory_slot old,
	163	int user_alloc)
	164	{
	165	return 0;
	166	}
	167
34d4cb8f MT	168	void kvm_arch_flush_shadow(struct kvm *kvm)
	169	{
	170	}
	171
bbf45ba5 HB	172	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
	173	{
	174	struct kvm_vcpu *vcpu;
	175	int err;
	176
	177	vcpu = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
	178	if (!vcpu) {
	179	err = -ENOMEM;
	180	goto out;
	181	}
	182
	183	err = kvm_vcpu_init(vcpu, kvm, id);
	184	if (err)
	185	goto free_vcpu;
	186
	187	return vcpu;
	188
	189	free_vcpu:
	190	kmem_cache_free(kvm_vcpu_cache, vcpu);
	191	out:
	192	return ERR_PTR(err);
	193	}
	194
	195	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	196	{
	197	kvm_vcpu_uninit(vcpu);
	198	kmem_cache_free(kvm_vcpu_cache, vcpu);
	199	}
	200
	201	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	202	{
	203	kvm_arch_vcpu_free(vcpu);
	204	}
	205
	206	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	207	{
9dd921cf	208	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	209	}
	210
	211	static void kvmppc_decrementer_func(unsigned long data)
	212	{
	213	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	214
9dd921cf	215	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	216
	217	if (waitqueue_active(&vcpu->wq)) {
	218	wake_up_interruptible(&vcpu->wq);
	219	vcpu->stat.halt_wakeup++;
	220	}
bbf45ba5 HB	221	}
	222
	223	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
	224	{
	225	setup_timer(&vcpu->arch.dec_timer, kvmppc_decrementer_func,
	226	(unsigned long)vcpu);
	227
	228	return 0;
	229	}
	230
	231	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	232	{
c30f8a6c	233	kvmppc_core_destroy_mmu(vcpu);
bbf45ba5 HB	234	}
	235
	236	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	237	{
6a0ab738	238	if (vcpu->guest_debug.enabled)
9dd921cf	239	kvmppc_core_load_guest_debugstate(vcpu);
83aae4a8	240
9dd921cf	241	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	242	}
	243
	244	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	245	{
6a0ab738	246	if (vcpu->guest_debug.enabled)
9dd921cf	247	kvmppc_core_load_host_debugstate(vcpu);
83aae4a8 HB	248
	249	/* Don't leave guest TLB entries resident when being de-scheduled. */
	250	/* XXX It would be nice to differentiate between heavyweight exit and
	251	* sched_out here, since we could avoid the TLB flush for heavyweight
	252	* exits. */
2a4aca11	253	_tlbil_all();
9dd921cf	254	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	255	}
bbf45ba5 HB	256
bbf45ba5 HB	257	int kvm_arch_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
	258	struct kvm_debug_guest *dbg)
	259	{
6a0ab738 HB	260	int i;
	261
	262	vcpu->guest_debug.enabled = dbg->enabled;
	263	if (vcpu->guest_debug.enabled) {
	264	for (i=0; i < ARRAY_SIZE(vcpu->guest_debug.bp); i++) {
	265	if (dbg->breakpoints[i].enabled)
	266	vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
	267	else
	268	vcpu->guest_debug.bp[i] = 0;
	269	}
	270	}
	271
	272	return 0;
bbf45ba5 HB	273	}
	274
	275	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	276	struct kvm_run *run)
	277	{
	278	u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
	279	*gpr = run->dcr.data;
	280	}
	281
	282	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	283	struct kvm_run *run)
	284	{
	285	u32 *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
	286
	287	if (run->mmio.len > sizeof(*gpr)) {
	288	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	289	return;
	290	}
	291
	292	if (vcpu->arch.mmio_is_bigendian) {
	293	switch (run->mmio.len) {
	294	case 4: gpr = (u32 *)run->mmio.data; break;
	295	case 2: gpr = (u16 *)run->mmio.data; break;
	296	case 1: gpr = (u8 *)run->mmio.data; break;
	297	}
	298	} else {
	299	/* Convert BE data from userland back to LE. */
	300	switch (run->mmio.len) {
	301	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	302	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	303	case 1: gpr = (u8 *)run->mmio.data; break;
	304	}
	305	}
	306	}
	307
	308	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	309	unsigned int rt, unsigned int bytes, int is_bigendian)
	310	{
	311	if (bytes > sizeof(run->mmio.data)) {
	312	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	313	run->mmio.len);
	314	}
	315
	316	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	317	run->mmio.len = bytes;
	318	run->mmio.is_write = 0;
	319
	320	vcpu->arch.io_gpr = rt;
	321	vcpu->arch.mmio_is_bigendian = is_bigendian;
	322	vcpu->mmio_needed = 1;
	323	vcpu->mmio_is_write = 0;
	324
	325	return EMULATE_DO_MMIO;
	326	}
	327
	328	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	329	u32 val, unsigned int bytes, int is_bigendian)
	330	{
	331	void *data = run->mmio.data;
	332
	333	if (bytes > sizeof(run->mmio.data)) {
	334	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	335	run->mmio.len);
	336	}
337
338	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
339	run->mmio.len = bytes;
340	run->mmio.is_write = 1;
341	vcpu->mmio_needed = 1;
342	vcpu->mmio_is_write = 1;
343
344	/* Store the value at the lowest bytes in 'data'. */
345	if (is_bigendian) {
346	switch (bytes) {
347	case 4: (u32 )data = val; break;
348	case 2: (u16 )data = val; break;
349	case 1: (u8 )data = val; break;
350	}
351	} else {
352	/* Store LE value into 'data'. */
353	switch (bytes) {
354	case 4: st_le32(data, val); break;
355	case 2: st_le16(data, val); break;
356	case 1: (u8 )data = val; break;
357	}
358	}
359
360	return EMULATE_DO_MMIO;
361	}
362
363	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
364	{
365	int r;
366	sigset_t sigsaved;
367
45c5eb67 HB	368	vcpu_load(vcpu);
45c5eb67 HB	369
bbf45ba5 HB	370	if (vcpu->sigset_active)
	371	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	372
	373	if (vcpu->mmio_needed) {
	374	if (!vcpu->mmio_is_write)
	375	kvmppc_complete_mmio_load(vcpu, run);
	376	vcpu->mmio_needed = 0;
	377	} else if (vcpu->arch.dcr_needed) {
	378	if (!vcpu->arch.dcr_is_write)
	379	kvmppc_complete_dcr_load(vcpu, run);
	380	vcpu->arch.dcr_needed = 0;
	381	}
	382
9dd921cf	383	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	384
	385	local_irq_disable();
	386	kvm_guest_enter();
	387	r = __kvmppc_vcpu_run(run, vcpu);
	388	kvm_guest_exit();
	389	local_irq_enable();
	390
	391	if (vcpu->sigset_active)
	392	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	393
45c5eb67 HB	394	vcpu_put(vcpu);
45c5eb67 HB	395
bbf45ba5 HB	396	return r;
	397	}
	398
	399	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	400	{
9dd921cf	401	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	402
	403	if (waitqueue_active(&vcpu->wq)) {
	404	wake_up_interruptible(&vcpu->wq);
	405	vcpu->stat.halt_wakeup++;
	406	}
	407
bbf45ba5 HB	408	return 0;
	409	}
	410
	411	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	412	struct kvm_mp_state *mp_state)
	413	{
	414	return -EINVAL;
	415	}
	416
	417	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	418	struct kvm_mp_state *mp_state)
	419	{
	420	return -EINVAL;
	421	}
	422
	423	long kvm_arch_vcpu_ioctl(struct file *filp,
	424	unsigned int ioctl, unsigned long arg)
	425	{
	426	struct kvm_vcpu *vcpu = filp->private_data;
	427	void __user argp = (void __user )arg;
	428	long r;
	429
	430	switch (ioctl) {
	431	case KVM_INTERRUPT: {
	432	struct kvm_interrupt irq;
	433	r = -EFAULT;
	434	if (copy_from_user(&irq, argp, sizeof(irq)))
	435	goto out;
	436	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	437	break;
	438	}
	439	default:
	440	r = -EINVAL;
	441	}
	442
	443	out:
	444	return r;
	445	}
	446
	447	int kvm_vm_ioctl_get_dirty_log(struct kvm kvm, struct kvm_dirty_log log)
	448	{
	449	return -ENOTSUPP;
	450	}
	451
	452	long kvm_arch_vm_ioctl(struct file *filp,
	453	unsigned int ioctl, unsigned long arg)
	454	{
	455	long r;
	456
	457	switch (ioctl) {
	458	default:
	459	r = -EINVAL;
	460	}
	461
	462	return r;
	463	}
	464
	465	int kvm_arch_init(void *opaque)
	466	{
	467	return 0;
	468	}
	469
	470	void kvm_arch_exit(void)
	471	{
472	}