[mirror_ubuntu-zesty-kernel.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/hrtimer.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;
}

int kvm_arch_hardware_enable(void *garbage)
{
	return 0;
}

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_PPC_SEGSTATE:
		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;
	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++;
	}
}

/*
 * low level hrtimer wake routine. Because this runs in hardirq context
 * we schedule a tasklet to do the real work.
 */
enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	tasklet_schedule(&vcpu->arch.tasklet);

	return HRTIMER_NORESTART;
}

int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;

	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;
}

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

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

	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>
544c6761	26	#include <linux/hrtimer.h>
bbf45ba5 HB	27	#include <linux/fs.h>
	28	#include <asm/cputable.h>
	29	#include <asm/uaccess.h>
	30	#include <asm/kvm_ppc.h>
83aae4a8	31	#include <asm/tlbflush.h>
73e75b41	32	#include "timing.h"
fad7b9b5	33	#include "../mm/mmu_decl.h"
bbf45ba5	34
46f43c6e MT	35	#define CREATE_TRACE_POINTS
	36	#include "trace.h"
	37
bbf45ba5 HB	38	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
	39	{
	40	return gfn;
	41	}
	42
bbf45ba5 HB	43	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	44	{
a1b37100	45	return !(v->arch.msr & MSR_WE) \|\| !!(v->arch.pending_exceptions);
bbf45ba5 HB	46	}
	47
	48
	49	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	50	{
	51	enum emulation_result er;
	52	int r;
	53
	54	er = kvmppc_emulate_instruction(run, vcpu);
	55	switch (er) {
	56	case EMULATE_DONE:
	57	/* Future optimization: only reload non-volatiles if they were
	58	* actually modified. */
	59	r = RESUME_GUEST_NV;
	60	break;
	61	case EMULATE_DO_MMIO:
	62	run->exit_reason = KVM_EXIT_MMIO;
	63	/* We must reload nonvolatiles because "update" load/store
	64	* instructions modify register state. */
	65	/* Future optimization: only reload non-volatiles if they were
	66	* actually modified. */
	67	r = RESUME_HOST_NV;
	68	break;
	69	case EMULATE_FAIL:
	70	/* XXX Deliver Program interrupt to guest. */
	71	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
	72	vcpu->arch.last_inst);
	73	r = RESUME_HOST;
	74	break;
	75	default:
	76	BUG();
	77	}
	78
	79	return r;
	80	}
	81
10474ae8	82	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	83	{
10474ae8	84	return 0;
bbf45ba5 HB	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;
988a2cae	119	struct kvm_vcpu *vcpu;
bbf45ba5	120
988a2cae GN	121	kvm_for_each_vcpu(i, vcpu, kvm)
	122	kvm_arch_vcpu_free(vcpu);
	123
	124	mutex_lock(&kvm->lock);
	125	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	126	kvm->vcpus[i] = NULL;
	127
	128	atomic_set(&kvm->online_vcpus, 0);
	129	mutex_unlock(&kvm->lock);
bbf45ba5 HB	130	}
bbf45ba5 HB	131
ad8ba2cd SY	132	void kvm_arch_sync_events(struct kvm *kvm)
	133	{
	134	}
	135
bbf45ba5 HB	136	void kvm_arch_destroy_vm(struct kvm *kvm)
	137	{
	138	kvmppc_free_vcpus(kvm);
	139	kvm_free_physmem(kvm);
	140	kfree(kvm);
	141	}
	142
	143	int kvm_dev_ioctl_check_extension(long ext)
	144	{
	145	int r;
	146
	147	switch (ext) {
e15a1137 AG	148	case KVM_CAP_PPC_SEGSTATE:
	149	r = 1;
	150	break;
588968b6 LV	151	case KVM_CAP_COALESCED_MMIO:
	152	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	153	break;
bbf45ba5 HB	154	default:
	155	r = 0;
	156	break;
	157	}
	158	return r;
	159
	160	}
	161
	162	long kvm_arch_dev_ioctl(struct file *filp,
	163	unsigned int ioctl, unsigned long arg)
	164	{
	165	return -EINVAL;
	166	}
	167
	168	int kvm_arch_set_memory_region(struct kvm *kvm,
	169	struct kvm_userspace_memory_region *mem,
	170	struct kvm_memory_slot old,
	171	int user_alloc)
	172	{
	173	return 0;
	174	}
	175
34d4cb8f MT	176	void kvm_arch_flush_shadow(struct kvm *kvm)
	177	{
	178	}
	179
bbf45ba5 HB	180	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	181	{
73e75b41 HB	182	struct kvm_vcpu *vcpu;
	183	vcpu = kvmppc_core_vcpu_create(kvm, id);
	184	kvmppc_create_vcpu_debugfs(vcpu, id);
	185	return vcpu;
bbf45ba5 HB	186	}
	187
	188	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	189	{
73e75b41	190	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	191	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	192	}
	193
	194	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	195	{
	196	kvm_arch_vcpu_free(vcpu);
	197	}
	198
	199	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	200	{
9dd921cf	201	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	202	}
	203
	204	static void kvmppc_decrementer_func(unsigned long data)
	205	{
	206	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	207
9dd921cf	208	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	209
	210	if (waitqueue_active(&vcpu->wq)) {
	211	wake_up_interruptible(&vcpu->wq);
	212	vcpu->stat.halt_wakeup++;
	213	}
bbf45ba5 HB	214	}
bbf45ba5 HB	215
544c6761 AG	216	/*
	217	* low level hrtimer wake routine. Because this runs in hardirq context
	218	* we schedule a tasklet to do the real work.
	219	*/
	220	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	221	{
	222	struct kvm_vcpu *vcpu;
	223
	224	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	225	tasklet_schedule(&vcpu->arch.tasklet);
	226
	227	return HRTIMER_NORESTART;
	228	}
	229
bbf45ba5 HB	230	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	231	{
544c6761 AG	232	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	233	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	234	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	235
	236	return 0;
	237	}
	238
	239	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	240	{
ecc0981f	241	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	242	}
	243
	244	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	245	{
9dd921cf	246	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	247	}
	248
	249	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	250	{
9dd921cf	251	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	252	}
bbf45ba5 HB	253
d0bfb940	254	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	255	struct kvm_guest_debug *dbg)
bbf45ba5	256	{
f5d0906b	257	return -EINVAL;
bbf45ba5 HB	258	}
	259
	260	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	261	struct kvm_run *run)
	262	{
5cf8ca22	263	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	264	*gpr = run->dcr.data;
	265	}
	266
	267	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	268	struct kvm_run *run)
	269	{
5cf8ca22	270	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	271
	272	if (run->mmio.len > sizeof(*gpr)) {
	273	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	274	return;
	275	}
	276
	277	if (vcpu->arch.mmio_is_bigendian) {
	278	switch (run->mmio.len) {
	279	case 4: gpr = (u32 *)run->mmio.data; break;
	280	case 2: gpr = (u16 *)run->mmio.data; break;
	281	case 1: gpr = (u8 *)run->mmio.data; break;
	282	}
	283	} else {
	284	/* Convert BE data from userland back to LE. */
	285	switch (run->mmio.len) {
	286	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	287	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	288	case 1: gpr = (u8 *)run->mmio.data; break;
	289	}
	290	}
	291	}
	292
	293	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	294	unsigned int rt, unsigned int bytes, int is_bigendian)
	295	{
	296	if (bytes > sizeof(run->mmio.data)) {
	297	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	298	run->mmio.len);
	299	}
	300
	301	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	302	run->mmio.len = bytes;
	303	run->mmio.is_write = 0;
	304
	305	vcpu->arch.io_gpr = rt;
	306	vcpu->arch.mmio_is_bigendian = is_bigendian;
	307	vcpu->mmio_needed = 1;
	308	vcpu->mmio_is_write = 0;
	309
	310	return EMULATE_DO_MMIO;
	311	}
	312
	313	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	314	u32 val, unsigned int bytes, int is_bigendian)
	315	{
	316	void *data = run->mmio.data;
	317
	318	if (bytes > sizeof(run->mmio.data)) {
	319	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	320	run->mmio.len);
	321	}
	322
	323	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	324	run->mmio.len = bytes;
	325	run->mmio.is_write = 1;
	326	vcpu->mmio_needed = 1;
	327	vcpu->mmio_is_write = 1;
	328
	329	/* Store the value at the lowest bytes in 'data'. */
	330	if (is_bigendian) {
	331	switch (bytes) {
	332	case 4: (u32 )data = val; break;
	333	case 2: (u16 )data = val; break;
	334	case 1: (u8 )data = val; break;
335	}
336	} else {
337	/* Store LE value into 'data'. */
338	switch (bytes) {
339	case 4: st_le32(data, val); break;
340	case 2: st_le16(data, val); break;
341	case 1: (u8 )data = val; break;
342	}
343	}
344
345	return EMULATE_DO_MMIO;
346	}
347
348	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
349	{
350	int r;
351	sigset_t sigsaved;
352
45c5eb67 HB	353	vcpu_load(vcpu);
45c5eb67 HB	354
bbf45ba5 HB	355	if (vcpu->sigset_active)
	356	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	357
	358	if (vcpu->mmio_needed) {
	359	if (!vcpu->mmio_is_write)
	360	kvmppc_complete_mmio_load(vcpu, run);
	361	vcpu->mmio_needed = 0;
	362	} else if (vcpu->arch.dcr_needed) {
	363	if (!vcpu->arch.dcr_is_write)
	364	kvmppc_complete_dcr_load(vcpu, run);
	365	vcpu->arch.dcr_needed = 0;
	366	}
	367
9dd921cf	368	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	369
	370	local_irq_disable();
	371	kvm_guest_enter();
	372	r = __kvmppc_vcpu_run(run, vcpu);
	373	kvm_guest_exit();
	374	local_irq_enable();
	375
	376	if (vcpu->sigset_active)
	377	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	378
45c5eb67 HB	379	vcpu_put(vcpu);
45c5eb67 HB	380
bbf45ba5 HB	381	return r;
	382	}
	383
	384	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	385	{
9dd921cf	386	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	387
	388	if (waitqueue_active(&vcpu->wq)) {
	389	wake_up_interruptible(&vcpu->wq);
	390	vcpu->stat.halt_wakeup++;
	391	}
	392
bbf45ba5 HB	393	return 0;
	394	}
	395
	396	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	397	struct kvm_mp_state *mp_state)
	398	{
	399	return -EINVAL;
	400	}
	401
	402	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	403	struct kvm_mp_state *mp_state)
	404	{
	405	return -EINVAL;
	406	}
	407
	408	long kvm_arch_vcpu_ioctl(struct file *filp,
	409	unsigned int ioctl, unsigned long arg)
	410	{
	411	struct kvm_vcpu *vcpu = filp->private_data;
	412	void __user argp = (void __user )arg;
	413	long r;
	414
	415	switch (ioctl) {
	416	case KVM_INTERRUPT: {
	417	struct kvm_interrupt irq;
	418	r = -EFAULT;
	419	if (copy_from_user(&irq, argp, sizeof(irq)))
	420	goto out;
	421	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	422	break;
	423	}
	424	default:
	425	r = -EINVAL;
	426	}
	427
	428	out:
	429	return r;
	430	}
	431
bbf45ba5 HB	432	long kvm_arch_vm_ioctl(struct file *filp,
	433	unsigned int ioctl, unsigned long arg)
	434	{
	435	long r;
	436
	437	switch (ioctl) {
	438	default:
367e1319	439	r = -ENOTTY;
bbf45ba5 HB	440	}
	441
	442	return r;
	443	}
	444
	445	int kvm_arch_init(void *opaque)
	446	{
	447	return 0;
	448	}
	449
	450	void kvm_arch_exit(void)
	451	{
	452	}