[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/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);
	cleanup_srcu_struct(&kvm->srcu);
	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_prepare_memory_region(struct kvm *kvm,
                                   struct kvm_memory_slot *memslot,
                                   struct kvm_memory_slot old,
                                   struct kvm_userspace_memory_region *mem,
                                   int user_alloc)
{
	return 0;
}

void kvm_arch_commit_memory_region(struct kvm *kvm,
               struct kvm_userspace_memory_region *mem,
               struct kvm_memory_slot old,
               int user_alloc)
{
       return;
}


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)
{
	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
}

static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
                                      struct kvm_run *run)
{
	ulong 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;
		}
	}

	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
}

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);
64749204	140	cleanup_srcu_struct(&kvm->srcu);
bbf45ba5 HB	141	kfree(kvm);
	142	}
	143
	144	int kvm_dev_ioctl_check_extension(long ext)
	145	{
	146	int r;
	147
	148	switch (ext) {
e15a1137 AG	149	case KVM_CAP_PPC_SEGSTATE:
	150	r = 1;
	151	break;
588968b6 LV	152	case KVM_CAP_COALESCED_MMIO:
	153	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	154	break;
bbf45ba5 HB	155	default:
	156	r = 0;
	157	break;
	158	}
	159	return r;
	160
	161	}
	162
	163	long kvm_arch_dev_ioctl(struct file *filp,
	164	unsigned int ioctl, unsigned long arg)
	165	{
	166	return -EINVAL;
	167	}
	168
f7784b8e MT	169	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	170	struct kvm_memory_slot *memslot,
	171	struct kvm_memory_slot old,
	172	struct kvm_userspace_memory_region *mem,
	173	int user_alloc)
bbf45ba5 HB	174	{
	175	return 0;
	176	}
	177
f7784b8e MT	178	void kvm_arch_commit_memory_region(struct kvm *kvm,
	179	struct kvm_userspace_memory_region *mem,
	180	struct kvm_memory_slot old,
	181	int user_alloc)
	182	{
	183	return;
	184	}
	185
	186
34d4cb8f MT	187	void kvm_arch_flush_shadow(struct kvm *kvm)
	188	{
	189	}
	190
bbf45ba5 HB	191	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	192	{
73e75b41 HB	193	struct kvm_vcpu *vcpu;
	194	vcpu = kvmppc_core_vcpu_create(kvm, id);
	195	kvmppc_create_vcpu_debugfs(vcpu, id);
	196	return vcpu;
bbf45ba5 HB	197	}
	198
	199	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	200	{
73e75b41	201	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	202	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	203	}
	204
	205	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	206	{
	207	kvm_arch_vcpu_free(vcpu);
	208	}
	209
	210	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	211	{
9dd921cf	212	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	213	}
	214
	215	static void kvmppc_decrementer_func(unsigned long data)
	216	{
	217	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	218
9dd921cf	219	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	220
	221	if (waitqueue_active(&vcpu->wq)) {
	222	wake_up_interruptible(&vcpu->wq);
	223	vcpu->stat.halt_wakeup++;
	224	}
bbf45ba5 HB	225	}
bbf45ba5 HB	226
544c6761 AG	227	/*
	228	* low level hrtimer wake routine. Because this runs in hardirq context
	229	* we schedule a tasklet to do the real work.
	230	*/
	231	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	232	{
	233	struct kvm_vcpu *vcpu;
	234
	235	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	236	tasklet_schedule(&vcpu->arch.tasklet);
	237
	238	return HRTIMER_NORESTART;
	239	}
	240
bbf45ba5 HB	241	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	242	{
544c6761 AG	243	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	244	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	245	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	246
	247	return 0;
	248	}
	249
	250	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	251	{
ecc0981f	252	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	253	}
	254
	255	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	256	{
9dd921cf	257	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	258	}
	259
	260	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	261	{
9dd921cf	262	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	263	}
bbf45ba5 HB	264
d0bfb940	265	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	266	struct kvm_guest_debug *dbg)
bbf45ba5	267	{
f5d0906b	268	return -EINVAL;
bbf45ba5 HB	269	}
	270
	271	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	272	struct kvm_run *run)
	273	{
8e5b26b5	274	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	275	}
	276
	277	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	278	struct kvm_run *run)
	279	{
8e5b26b5	280	ulong gpr;
bbf45ba5	281
8e5b26b5	282	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	283	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	284	return;
	285	}
	286
	287	if (vcpu->arch.mmio_is_bigendian) {
	288	switch (run->mmio.len) {
8e5b26b5 AG	289	case 4: gpr = (u32 )run->mmio.data; break;
	290	case 2: gpr = (u16 )run->mmio.data; break;
	291	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	292	}
	293	} else {
	294	/* Convert BE data from userland back to LE. */
	295	switch (run->mmio.len) {
8e5b26b5 AG	296	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	297	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	298	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	299	}
bbf45ba5 HB	300	}
8e5b26b5 AG	301
8e5b26b5 AG	302	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
bbf45ba5 HB	303	}
	304
	305	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	306	unsigned int rt, unsigned int bytes, int is_bigendian)
	307	{
	308	if (bytes > sizeof(run->mmio.data)) {
	309	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	310	run->mmio.len);
	311	}
	312
	313	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	314	run->mmio.len = bytes;
	315	run->mmio.is_write = 0;
	316
	317	vcpu->arch.io_gpr = rt;
	318	vcpu->arch.mmio_is_bigendian = is_bigendian;
	319	vcpu->mmio_needed = 1;
	320	vcpu->mmio_is_write = 0;
	321
	322	return EMULATE_DO_MMIO;
	323	}
	324
	325	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	326	u32 val, unsigned int bytes, int is_bigendian)
	327	{
	328	void *data = run->mmio.data;
	329
	330	if (bytes > sizeof(run->mmio.data)) {
	331	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	332	run->mmio.len);
	333	}
	334
	335	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	336	run->mmio.len = bytes;
	337	run->mmio.is_write = 1;
	338	vcpu->mmio_needed = 1;
	339	vcpu->mmio_is_write = 1;
	340
	341	/* Store the value at the lowest bytes in 'data'. */
	342	if (is_bigendian) {
	343	switch (bytes) {
	344	case 4: (u32 )data = val; break;
	345	case 2: (u16 )data = val; break;
	346	case 1: (u8 )data = val; break;
	347	}
	348	} else {
	349	/* Store LE value into 'data'. */
	350	switch (bytes) {
	351	case 4: st_le32(data, val); break;
	352	case 2: st_le16(data, val); break;
	353	case 1: (u8 )data = val; break;
	354	}
	355	}
	356
	357	return EMULATE_DO_MMIO;
	358	}
	359
	360	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	361	{
	362	int r;
	363	sigset_t sigsaved;
	364
45c5eb67 HB	365	vcpu_load(vcpu);
45c5eb67 HB	366
bbf45ba5 HB	367	if (vcpu->sigset_active)
	368	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	369
	370	if (vcpu->mmio_needed) {
	371	if (!vcpu->mmio_is_write)
	372	kvmppc_complete_mmio_load(vcpu, run);
	373	vcpu->mmio_needed = 0;
	374	} else if (vcpu->arch.dcr_needed) {
	375	if (!vcpu->arch.dcr_is_write)
	376	kvmppc_complete_dcr_load(vcpu, run);
	377	vcpu->arch.dcr_needed = 0;
	378	}
	379
9dd921cf	380	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	381
	382	local_irq_disable();
	383	kvm_guest_enter();
	384	r = __kvmppc_vcpu_run(run, vcpu);
	385	kvm_guest_exit();
	386	local_irq_enable();
	387
	388	if (vcpu->sigset_active)
	389	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	390
45c5eb67 HB	391	vcpu_put(vcpu);
45c5eb67 HB	392
bbf45ba5 HB	393	return r;
	394	}
	395
	396	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	397	{
9dd921cf	398	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	399
	400	if (waitqueue_active(&vcpu->wq)) {
	401	wake_up_interruptible(&vcpu->wq);
	402	vcpu->stat.halt_wakeup++;
	403	}
	404
bbf45ba5 HB	405	return 0;
	406	}
	407
	408	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	409	struct kvm_mp_state *mp_state)
	410	{
	411	return -EINVAL;
	412	}
	413
	414	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	415	struct kvm_mp_state *mp_state)
	416	{
	417	return -EINVAL;
	418	}
	419
	420	long kvm_arch_vcpu_ioctl(struct file *filp,
	421	unsigned int ioctl, unsigned long arg)
	422	{
	423	struct kvm_vcpu *vcpu = filp->private_data;
	424	void __user argp = (void __user )arg;
	425	long r;
	426
	427	switch (ioctl) {
	428	case KVM_INTERRUPT: {
	429	struct kvm_interrupt irq;
	430	r = -EFAULT;
	431	if (copy_from_user(&irq, argp, sizeof(irq)))
	432	goto out;
	433	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	434	break;
	435	}
	436	default:
	437	r = -EINVAL;
	438	}
	439
	440	out:
	441	return r;
	442	}
	443
bbf45ba5 HB	444	long kvm_arch_vm_ioctl(struct file *filp,
	445	unsigned int ioctl, unsigned long arg)
	446	{
	447	long r;
	448
	449	switch (ioctl) {
	450	default:
367e1319	451	r = -ENOTTY;
bbf45ba5 HB	452	}
	453
	454	return r;
	455	}
	456
	457	int kvm_arch_init(void *opaque)
	458	{
	459	return 0;
	460	}
	461
	462	void kvm_arch_exit(void)
	463	{
	464	}