[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/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;
}

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++;
	}
}

/*
 * 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 = -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>
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
	82	void kvm_arch_hardware_enable(void *garbage)
	83	{
	84	}
	85
	86	void kvm_arch_hardware_disable(void *garbage)
	87	{
	88	}
	89
	90	int kvm_arch_hardware_setup(void)
	91	{
	92	return 0;
	93	}
	94
	95	void kvm_arch_hardware_unsetup(void)
	96	{
	97	}
	98
	99	void kvm_arch_check_processor_compat(void *rtn)
	100	{
9dd921cf	101	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	102	}
	103
	104	struct kvm *kvm_arch_create_vm(void)
	105	{
	106	struct kvm *kvm;
	107
	108	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	109	if (!kvm)
	110	return ERR_PTR(-ENOMEM);
	111
	112	return kvm;
	113	}
	114
	115	static void kvmppc_free_vcpus(struct kvm *kvm)
	116	{
	117	unsigned int i;
988a2cae	118	struct kvm_vcpu *vcpu;
bbf45ba5	119
988a2cae GN	120	kvm_for_each_vcpu(i, vcpu, kvm)
	121	kvm_arch_vcpu_free(vcpu);
	122
	123	mutex_lock(&kvm->lock);
	124	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	125	kvm->vcpus[i] = NULL;
	126
	127	atomic_set(&kvm->online_vcpus, 0);
	128	mutex_unlock(&kvm->lock);
bbf45ba5 HB	129	}
bbf45ba5 HB	130
ad8ba2cd SY	131	void kvm_arch_sync_events(struct kvm *kvm)
	132	{
	133	}
	134
bbf45ba5 HB	135	void kvm_arch_destroy_vm(struct kvm *kvm)
	136	{
	137	kvmppc_free_vcpus(kvm);
	138	kvm_free_physmem(kvm);
	139	kfree(kvm);
	140	}
	141
	142	int kvm_dev_ioctl_check_extension(long ext)
	143	{
	144	int r;
	145
	146	switch (ext) {
588968b6 LV	147	case KVM_CAP_COALESCED_MMIO:
	148	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	149	break;
bbf45ba5 HB	150	default:
	151	r = 0;
	152	break;
	153	}
	154	return r;
	155
	156	}
	157
	158	long kvm_arch_dev_ioctl(struct file *filp,
	159	unsigned int ioctl, unsigned long arg)
	160	{
	161	return -EINVAL;
	162	}
	163
	164	int kvm_arch_set_memory_region(struct kvm *kvm,
	165	struct kvm_userspace_memory_region *mem,
	166	struct kvm_memory_slot old,
	167	int user_alloc)
	168	{
	169	return 0;
	170	}
	171
34d4cb8f MT	172	void kvm_arch_flush_shadow(struct kvm *kvm)
	173	{
	174	}
	175
bbf45ba5 HB	176	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	177	{
73e75b41 HB	178	struct kvm_vcpu *vcpu;
	179	vcpu = kvmppc_core_vcpu_create(kvm, id);
	180	kvmppc_create_vcpu_debugfs(vcpu, id);
	181	return vcpu;
bbf45ba5 HB	182	}
	183
	184	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	185	{
73e75b41	186	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	187	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	188	}
	189
	190	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	191	{
	192	kvm_arch_vcpu_free(vcpu);
	193	}
	194
	195	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	196	{
9dd921cf	197	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	198	}
	199
	200	static void kvmppc_decrementer_func(unsigned long data)
	201	{
	202	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	203
9dd921cf	204	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	205
	206	if (waitqueue_active(&vcpu->wq)) {
	207	wake_up_interruptible(&vcpu->wq);
	208	vcpu->stat.halt_wakeup++;
	209	}
bbf45ba5 HB	210	}
bbf45ba5 HB	211
544c6761 AG	212	/*
	213	* low level hrtimer wake routine. Because this runs in hardirq context
	214	* we schedule a tasklet to do the real work.
	215	*/
	216	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	217	{
	218	struct kvm_vcpu *vcpu;
	219
	220	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	221	tasklet_schedule(&vcpu->arch.tasklet);
	222
	223	return HRTIMER_NORESTART;
	224	}
	225
bbf45ba5 HB	226	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	227	{
544c6761 AG	228	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	229	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	230	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	231
	232	return 0;
	233	}
	234
	235	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	236	{
ecc0981f	237	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	238	}
	239
	240	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	241	{
9dd921cf	242	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	243	}
	244
	245	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	246	{
9dd921cf	247	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	248	}
bbf45ba5 HB	249
d0bfb940	250	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	251	struct kvm_guest_debug *dbg)
bbf45ba5	252	{
f5d0906b	253	return -EINVAL;
bbf45ba5 HB	254	}
	255
	256	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	257	struct kvm_run *run)
	258	{
5cf8ca22	259	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	260	*gpr = run->dcr.data;
	261	}
	262
	263	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	264	struct kvm_run *run)
	265	{
5cf8ca22	266	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	267
	268	if (run->mmio.len > sizeof(*gpr)) {
	269	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	270	return;
	271	}
	272
	273	if (vcpu->arch.mmio_is_bigendian) {
	274	switch (run->mmio.len) {
	275	case 4: gpr = (u32 *)run->mmio.data; break;
	276	case 2: gpr = (u16 *)run->mmio.data; break;
	277	case 1: gpr = (u8 *)run->mmio.data; break;
	278	}
	279	} else {
	280	/* Convert BE data from userland back to LE. */
	281	switch (run->mmio.len) {
	282	case 4: gpr = ld_le32((u32 )run->mmio.data); break;
	283	case 2: gpr = ld_le16((u16 )run->mmio.data); break;
	284	case 1: gpr = (u8 *)run->mmio.data; break;
	285	}
	286	}
	287	}
	288
	289	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	290	unsigned int rt, unsigned int bytes, int is_bigendian)
	291	{
	292	if (bytes > sizeof(run->mmio.data)) {
	293	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	294	run->mmio.len);
	295	}
	296
	297	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	298	run->mmio.len = bytes;
	299	run->mmio.is_write = 0;
	300
	301	vcpu->arch.io_gpr = rt;
	302	vcpu->arch.mmio_is_bigendian = is_bigendian;
	303	vcpu->mmio_needed = 1;
	304	vcpu->mmio_is_write = 0;
	305
	306	return EMULATE_DO_MMIO;
	307	}
	308
	309	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	310	u32 val, unsigned int bytes, int is_bigendian)
	311	{
	312	void *data = run->mmio.data;
	313
	314	if (bytes > sizeof(run->mmio.data)) {
	315	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	316	run->mmio.len);
	317	}
	318
	319	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	320	run->mmio.len = bytes;
	321	run->mmio.is_write = 1;
	322	vcpu->mmio_needed = 1;
	323	vcpu->mmio_is_write = 1;
	324
	325	/* Store the value at the lowest bytes in 'data'. */
	326	if (is_bigendian) {
	327	switch (bytes) {
	328	case 4: (u32 )data = val; break;
	329	case 2: (u16 )data = val; break;
	330	case 1: (u8 )data = val; break;
331	}
332	} else {
333	/* Store LE value into 'data'. */
334	switch (bytes) {
335	case 4: st_le32(data, val); break;
336	case 2: st_le16(data, val); break;
337	case 1: (u8 )data = val; break;
338	}
339	}
340
341	return EMULATE_DO_MMIO;
342	}
343
344	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
345	{
346	int r;
347	sigset_t sigsaved;
348
45c5eb67 HB	349	vcpu_load(vcpu);
45c5eb67 HB	350
bbf45ba5 HB	351	if (vcpu->sigset_active)
	352	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	353
	354	if (vcpu->mmio_needed) {
	355	if (!vcpu->mmio_is_write)
	356	kvmppc_complete_mmio_load(vcpu, run);
	357	vcpu->mmio_needed = 0;
	358	} else if (vcpu->arch.dcr_needed) {
	359	if (!vcpu->arch.dcr_is_write)
	360	kvmppc_complete_dcr_load(vcpu, run);
	361	vcpu->arch.dcr_needed = 0;
	362	}
	363
9dd921cf	364	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	365
	366	local_irq_disable();
	367	kvm_guest_enter();
	368	r = __kvmppc_vcpu_run(run, vcpu);
	369	kvm_guest_exit();
	370	local_irq_enable();
	371
	372	if (vcpu->sigset_active)
	373	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	374
45c5eb67 HB	375	vcpu_put(vcpu);
45c5eb67 HB	376
bbf45ba5 HB	377	return r;
	378	}
	379
	380	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	381	{
9dd921cf	382	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	383
	384	if (waitqueue_active(&vcpu->wq)) {
	385	wake_up_interruptible(&vcpu->wq);
	386	vcpu->stat.halt_wakeup++;
	387	}
	388
bbf45ba5 HB	389	return 0;
	390	}
	391
	392	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	393	struct kvm_mp_state *mp_state)
	394	{
	395	return -EINVAL;
	396	}
	397
	398	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	399	struct kvm_mp_state *mp_state)
	400	{
	401	return -EINVAL;
	402	}
	403
	404	long kvm_arch_vcpu_ioctl(struct file *filp,
	405	unsigned int ioctl, unsigned long arg)
	406	{
	407	struct kvm_vcpu *vcpu = filp->private_data;
	408	void __user argp = (void __user )arg;
	409	long r;
	410
	411	switch (ioctl) {
	412	case KVM_INTERRUPT: {
	413	struct kvm_interrupt irq;
	414	r = -EFAULT;
	415	if (copy_from_user(&irq, argp, sizeof(irq)))
	416	goto out;
	417	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	418	break;
	419	}
	420	default:
	421	r = -EINVAL;
	422	}
	423
	424	out:
	425	return r;
	426	}
	427
bbf45ba5 HB	428	long kvm_arch_vm_ioctl(struct file *filp,
	429	unsigned int ioctl, unsigned long arg)
	430	{
	431	long r;
	432
	433	switch (ioctl) {
	434	default:
	435	r = -EINVAL;
	436	}
	437
	438	return r;
	439	}
	440
	441	int kvm_arch_init(void *opaque)
	442	{
	443	return 0;
	444	}
	445
	446	void kvm_arch_exit(void)
	447	{
	448	}