[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_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)
{
	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
f7784b8e MT	168	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	169	struct kvm_memory_slot *memslot,
	170	struct kvm_memory_slot old,
	171	struct kvm_userspace_memory_region *mem,
	172	int user_alloc)
bbf45ba5 HB	173	{
	174	return 0;
	175	}
	176
f7784b8e MT	177	void kvm_arch_commit_memory_region(struct kvm *kvm,
	178	struct kvm_userspace_memory_region *mem,
	179	struct kvm_memory_slot old,
	180	int user_alloc)
	181	{
	182	return;
	183	}
	184
	185
34d4cb8f MT	186	void kvm_arch_flush_shadow(struct kvm *kvm)
	187	{
	188	}
	189
bbf45ba5 HB	190	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	191	{
73e75b41 HB	192	struct kvm_vcpu *vcpu;
	193	vcpu = kvmppc_core_vcpu_create(kvm, id);
	194	kvmppc_create_vcpu_debugfs(vcpu, id);
	195	return vcpu;
bbf45ba5 HB	196	}
	197
	198	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	199	{
73e75b41	200	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	201	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	202	}
	203
	204	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	205	{
	206	kvm_arch_vcpu_free(vcpu);
	207	}
	208
	209	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	210	{
9dd921cf	211	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	212	}
	213
	214	static void kvmppc_decrementer_func(unsigned long data)
	215	{
	216	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	217
9dd921cf	218	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	219
	220	if (waitqueue_active(&vcpu->wq)) {
	221	wake_up_interruptible(&vcpu->wq);
	222	vcpu->stat.halt_wakeup++;
	223	}
bbf45ba5 HB	224	}
bbf45ba5 HB	225
544c6761 AG	226	/*
	227	* low level hrtimer wake routine. Because this runs in hardirq context
	228	* we schedule a tasklet to do the real work.
	229	*/
	230	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	231	{
	232	struct kvm_vcpu *vcpu;
	233
	234	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	235	tasklet_schedule(&vcpu->arch.tasklet);
	236
	237	return HRTIMER_NORESTART;
	238	}
	239
bbf45ba5 HB	240	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	241	{
544c6761 AG	242	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	243	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	244	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	245
	246	return 0;
	247	}
	248
	249	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	250	{
ecc0981f	251	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	252	}
	253
	254	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	255	{
9dd921cf	256	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	257	}
	258
	259	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	260	{
9dd921cf	261	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	262	}
bbf45ba5 HB	263
d0bfb940	264	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	265	struct kvm_guest_debug *dbg)
bbf45ba5	266	{
f5d0906b	267	return -EINVAL;
bbf45ba5 HB	268	}
	269
	270	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	271	struct kvm_run *run)
	272	{
5cf8ca22	273	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	274	*gpr = run->dcr.data;
	275	}
	276
	277	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	278	struct kvm_run *run)
	279	{
5cf8ca22	280	ulong *gpr = &vcpu->arch.gpr[vcpu->arch.io_gpr];
bbf45ba5 HB	281
	282	if (run->mmio.len > sizeof(*gpr)) {
	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) {
	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;
	292	}
	293	} else {
	294	/* Convert BE data from userland back to LE. */
	295	switch (run->mmio.len) {
	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;
	299	}
	300	}
	301	}
	302
	303	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	304	unsigned int rt, unsigned int bytes, int is_bigendian)
	305	{
	306	if (bytes > sizeof(run->mmio.data)) {
	307	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	308	run->mmio.len);
	309	}
	310
	311	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	312	run->mmio.len = bytes;
	313	run->mmio.is_write = 0;
	314
	315	vcpu->arch.io_gpr = rt;
	316	vcpu->arch.mmio_is_bigendian = is_bigendian;
	317	vcpu->mmio_needed = 1;
	318	vcpu->mmio_is_write = 0;
	319
	320	return EMULATE_DO_MMIO;
	321	}
	322
	323	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
	324	u32 val, unsigned int bytes, int is_bigendian)
	325	{
	326	void *data = run->mmio.data;
	327
	328	if (bytes > sizeof(run->mmio.data)) {
	329	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	330	run->mmio.len);
	331	}
	332
	333	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	334	run->mmio.len = bytes;
	335	run->mmio.is_write = 1;
	336	vcpu->mmio_needed = 1;
	337	vcpu->mmio_is_write = 1;
	338
	339	/* Store the value at the lowest bytes in 'data'. */
	340	if (is_bigendian) {
	341	switch (bytes) {
	342	case 4: (u32 )data = val; break;
	343	case 2: (u16 )data = val; break;
	344	case 1: (u8 )data = val; break;
345	}
346	} else {
347	/* Store LE value into 'data'. */
348	switch (bytes) {
349	case 4: st_le32(data, val); break;
350	case 2: st_le16(data, val); break;
351	case 1: (u8 )data = val; break;
352	}
353	}
354
355	return EMULATE_DO_MMIO;
356	}
357
358	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
359	{
360	int r;
361	sigset_t sigsaved;
362
45c5eb67 HB	363	vcpu_load(vcpu);
45c5eb67 HB	364
bbf45ba5 HB	365	if (vcpu->sigset_active)
	366	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	367
	368	if (vcpu->mmio_needed) {
	369	if (!vcpu->mmio_is_write)
	370	kvmppc_complete_mmio_load(vcpu, run);
	371	vcpu->mmio_needed = 0;
	372	} else if (vcpu->arch.dcr_needed) {
	373	if (!vcpu->arch.dcr_is_write)
	374	kvmppc_complete_dcr_load(vcpu, run);
	375	vcpu->arch.dcr_needed = 0;
	376	}
	377
9dd921cf	378	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	379
	380	local_irq_disable();
	381	kvm_guest_enter();
	382	r = __kvmppc_vcpu_run(run, vcpu);
	383	kvm_guest_exit();
	384	local_irq_enable();
	385
	386	if (vcpu->sigset_active)
	387	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	388
45c5eb67 HB	389	vcpu_put(vcpu);
45c5eb67 HB	390
bbf45ba5 HB	391	return r;
	392	}
	393
	394	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	395	{
9dd921cf	396	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	397
	398	if (waitqueue_active(&vcpu->wq)) {
	399	wake_up_interruptible(&vcpu->wq);
	400	vcpu->stat.halt_wakeup++;
	401	}
	402
bbf45ba5 HB	403	return 0;
	404	}
	405
	406	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	407	struct kvm_mp_state *mp_state)
	408	{
	409	return -EINVAL;
	410	}
	411
	412	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	413	struct kvm_mp_state *mp_state)
	414	{
	415	return -EINVAL;
	416	}
	417
	418	long kvm_arch_vcpu_ioctl(struct file *filp,
	419	unsigned int ioctl, unsigned long arg)
	420	{
	421	struct kvm_vcpu *vcpu = filp->private_data;
	422	void __user argp = (void __user )arg;
	423	long r;
	424
	425	switch (ioctl) {
	426	case KVM_INTERRUPT: {
	427	struct kvm_interrupt irq;
	428	r = -EFAULT;
	429	if (copy_from_user(&irq, argp, sizeof(irq)))
	430	goto out;
	431	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	432	break;
	433	}
	434	default:
	435	r = -EINVAL;
	436	}
	437
	438	out:
	439	return r;
	440	}
	441
bbf45ba5 HB	442	long kvm_arch_vm_ioctl(struct file *filp,
	443	unsigned int ioctl, unsigned long arg)
	444	{
	445	long r;
	446
	447	switch (ioctl) {
	448	default:
367e1319	449	r = -ENOTTY;
bbf45ba5 HB	450	}
	451
	452	return r;
	453	}
	454
	455	int kvm_arch_init(void *opaque)
	456	{
	457	return 0;
	458	}
	459
	460	void kvm_arch_exit(void)
	461	{
	462	}