[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 <linux/slab.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)
{
	u64 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 8: gpr = *(u64 *)run->mmio.data; break;
		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);

	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	case KVM_REG_GPR:
		kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
		break;
	case KVM_REG_FPR:
		vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
		break;
	case KVM_REG_QPR:
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
		break;
	case KVM_REG_FQPR:
		vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
		vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
		break;
	default:
		BUG();
	}
}

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,
                        u64 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 8: *(u64 *)data = val; break;
		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	27	#include <linux/fs.h>
5a0e3ad6	28	#include <linux/slab.h>
bbf45ba5 HB	29	#include <asm/cputable.h>
	30	#include <asm/uaccess.h>
	31	#include <asm/kvm_ppc.h>
83aae4a8	32	#include <asm/tlbflush.h>
73e75b41	33	#include "timing.h"
fad7b9b5	34	#include "../mm/mmu_decl.h"
bbf45ba5	35
46f43c6e MT	36	#define CREATE_TRACE_POINTS
	37	#include "trace.h"
	38
bbf45ba5 HB	39	gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
	40	{
	41	return gfn;
	42	}
	43
bbf45ba5 HB	44	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	45	{
a1b37100	46	return !(v->arch.msr & MSR_WE) \|\| !!(v->arch.pending_exceptions);
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
10474ae8	83	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	84	{
10474ae8	85	return 0;
bbf45ba5 HB	86	}
	87
	88	void kvm_arch_hardware_disable(void *garbage)
	89	{
	90	}
	91
	92	int kvm_arch_hardware_setup(void)
	93	{
	94	return 0;
	95	}
	96
	97	void kvm_arch_hardware_unsetup(void)
	98	{
	99	}
	100
	101	void kvm_arch_check_processor_compat(void *rtn)
	102	{
9dd921cf	103	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	104	}
	105
	106	struct kvm *kvm_arch_create_vm(void)
	107	{
	108	struct kvm *kvm;
	109
	110	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	111	if (!kvm)
	112	return ERR_PTR(-ENOMEM);
	113
	114	return kvm;
	115	}
	116
	117	static void kvmppc_free_vcpus(struct kvm *kvm)
	118	{
	119	unsigned int i;
988a2cae	120	struct kvm_vcpu *vcpu;
bbf45ba5	121
988a2cae GN	122	kvm_for_each_vcpu(i, vcpu, kvm)
	123	kvm_arch_vcpu_free(vcpu);
	124
	125	mutex_lock(&kvm->lock);
	126	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	127	kvm->vcpus[i] = NULL;
	128
	129	atomic_set(&kvm->online_vcpus, 0);
	130	mutex_unlock(&kvm->lock);
bbf45ba5 HB	131	}
bbf45ba5 HB	132
ad8ba2cd SY	133	void kvm_arch_sync_events(struct kvm *kvm)
	134	{
	135	}
	136
bbf45ba5 HB	137	void kvm_arch_destroy_vm(struct kvm *kvm)
	138	{
	139	kvmppc_free_vcpus(kvm);
	140	kvm_free_physmem(kvm);
64749204	141	cleanup_srcu_struct(&kvm->srcu);
bbf45ba5 HB	142	kfree(kvm);
	143	}
	144
	145	int kvm_dev_ioctl_check_extension(long ext)
	146	{
	147	int r;
	148
	149	switch (ext) {
e15a1137 AG	150	case KVM_CAP_PPC_SEGSTATE:
	151	r = 1;
	152	break;
588968b6 LV	153	case KVM_CAP_COALESCED_MMIO:
	154	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	155	break;
bbf45ba5 HB	156	default:
	157	r = 0;
	158	break;
	159	}
	160	return r;
	161
	162	}
	163
	164	long kvm_arch_dev_ioctl(struct file *filp,
	165	unsigned int ioctl, unsigned long arg)
	166	{
	167	return -EINVAL;
	168	}
	169
f7784b8e MT	170	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	171	struct kvm_memory_slot *memslot,
	172	struct kvm_memory_slot old,
	173	struct kvm_userspace_memory_region *mem,
	174	int user_alloc)
bbf45ba5 HB	175	{
	176	return 0;
	177	}
	178
f7784b8e MT	179	void kvm_arch_commit_memory_region(struct kvm *kvm,
	180	struct kvm_userspace_memory_region *mem,
	181	struct kvm_memory_slot old,
	182	int user_alloc)
	183	{
	184	return;
	185	}
	186
	187
34d4cb8f MT	188	void kvm_arch_flush_shadow(struct kvm *kvm)
	189	{
	190	}
	191
bbf45ba5 HB	192	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	193	{
73e75b41 HB	194	struct kvm_vcpu *vcpu;
	195	vcpu = kvmppc_core_vcpu_create(kvm, id);
	196	kvmppc_create_vcpu_debugfs(vcpu, id);
	197	return vcpu;
bbf45ba5 HB	198	}
	199
	200	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	201	{
73e75b41	202	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	203	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	204	}
	205
	206	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	207	{
	208	kvm_arch_vcpu_free(vcpu);
	209	}
	210
	211	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	212	{
9dd921cf	213	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	214	}
	215
	216	static void kvmppc_decrementer_func(unsigned long data)
	217	{
	218	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	219
9dd921cf	220	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	221
	222	if (waitqueue_active(&vcpu->wq)) {
	223	wake_up_interruptible(&vcpu->wq);
	224	vcpu->stat.halt_wakeup++;
	225	}
bbf45ba5 HB	226	}
bbf45ba5 HB	227
544c6761 AG	228	/*
	229	* low level hrtimer wake routine. Because this runs in hardirq context
	230	* we schedule a tasklet to do the real work.
	231	*/
	232	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	233	{
	234	struct kvm_vcpu *vcpu;
	235
	236	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	237	tasklet_schedule(&vcpu->arch.tasklet);
	238
	239	return HRTIMER_NORESTART;
	240	}
	241
bbf45ba5 HB	242	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	243	{
544c6761 AG	244	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	245	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	246	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	247
	248	return 0;
	249	}
	250
	251	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	252	{
ecc0981f	253	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	254	}
	255
	256	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	257	{
9dd921cf	258	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	259	}
	260
	261	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	262	{
9dd921cf	263	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	264	}
bbf45ba5 HB	265
d0bfb940	266	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	267	struct kvm_guest_debug *dbg)
bbf45ba5	268	{
f5d0906b	269	return -EINVAL;
bbf45ba5 HB	270	}
	271
	272	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	273	struct kvm_run *run)
	274	{
8e5b26b5	275	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	276	}
	277
	278	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	279	struct kvm_run *run)
	280	{
b104d066	281	u64 gpr;
bbf45ba5	282
8e5b26b5	283	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	284	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	285	return;
	286	}
	287
	288	if (vcpu->arch.mmio_is_bigendian) {
	289	switch (run->mmio.len) {
b104d066	290	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	291	case 4: gpr = (u32 )run->mmio.data; break;
	292	case 2: gpr = (u16 )run->mmio.data; break;
	293	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	294	}
	295	} else {
	296	/* Convert BE data from userland back to LE. */
	297	switch (run->mmio.len) {
8e5b26b5 AG	298	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	299	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	300	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	301	}
bbf45ba5 HB	302	}
8e5b26b5 AG	303
8e5b26b5 AG	304	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	305
	306	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	307	case KVM_REG_GPR:
	308	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	309	break;
	310	case KVM_REG_FPR:
	311	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	312	break;
	313	case KVM_REG_QPR:
	314	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	315	break;
	316	case KVM_REG_FQPR:
	317	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	318	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	319	break;
	320	default:
	321	BUG();
	322	}
bbf45ba5 HB	323	}
	324
	325	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	326	unsigned int rt, unsigned int bytes, int is_bigendian)
	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 = 0;
	336
	337	vcpu->arch.io_gpr = rt;
	338	vcpu->arch.mmio_is_bigendian = is_bigendian;
	339	vcpu->mmio_needed = 1;
	340	vcpu->mmio_is_write = 0;
	341
	342	return EMULATE_DO_MMIO;
	343	}
	344
	345	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	346	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	347	{
	348	void *data = run->mmio.data;
	349
	350	if (bytes > sizeof(run->mmio.data)) {
	351	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	352	run->mmio.len);
	353	}
	354
	355	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	356	run->mmio.len = bytes;
	357	run->mmio.is_write = 1;
	358	vcpu->mmio_needed = 1;
	359	vcpu->mmio_is_write = 1;
	360
	361	/* Store the value at the lowest bytes in 'data'. */
	362	if (is_bigendian) {
	363	switch (bytes) {
b104d066	364	case 8: (u64 )data = val; break;
bbf45ba5 HB	365	case 4: (u32 )data = val; break;
	366	case 2: (u16 )data = val; break;
	367	case 1: (u8 )data = val; break;
	368	}
	369	} else {
	370	/* Store LE value into 'data'. */
	371	switch (bytes) {
	372	case 4: st_le32(data, val); break;
	373	case 2: st_le16(data, val); break;
	374	case 1: (u8 )data = val; break;
	375	}
	376	}
	377
	378	return EMULATE_DO_MMIO;
	379	}
	380
	381	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	382	{
	383	int r;
	384	sigset_t sigsaved;
	385
45c5eb67 HB	386	vcpu_load(vcpu);
45c5eb67 HB	387
bbf45ba5 HB	388	if (vcpu->sigset_active)
	389	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	390
	391	if (vcpu->mmio_needed) {
	392	if (!vcpu->mmio_is_write)
	393	kvmppc_complete_mmio_load(vcpu, run);
	394	vcpu->mmio_needed = 0;
	395	} else if (vcpu->arch.dcr_needed) {
	396	if (!vcpu->arch.dcr_is_write)
	397	kvmppc_complete_dcr_load(vcpu, run);
	398	vcpu->arch.dcr_needed = 0;
	399	}
	400
9dd921cf	401	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	402
	403	local_irq_disable();
	404	kvm_guest_enter();
	405	r = __kvmppc_vcpu_run(run, vcpu);
	406	kvm_guest_exit();
	407	local_irq_enable();
	408
	409	if (vcpu->sigset_active)
	410	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	411
45c5eb67 HB	412	vcpu_put(vcpu);
45c5eb67 HB	413
bbf45ba5 HB	414	return r;
	415	}
	416
	417	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	418	{
9dd921cf	419	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	420
	421	if (waitqueue_active(&vcpu->wq)) {
	422	wake_up_interruptible(&vcpu->wq);
	423	vcpu->stat.halt_wakeup++;
	424	}
	425
bbf45ba5 HB	426	return 0;
	427	}
	428
	429	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	430	struct kvm_mp_state *mp_state)
	431	{
	432	return -EINVAL;
	433	}
	434
	435	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	436	struct kvm_mp_state *mp_state)
	437	{
	438	return -EINVAL;
	439	}
	440
	441	long kvm_arch_vcpu_ioctl(struct file *filp,
	442	unsigned int ioctl, unsigned long arg)
	443	{
	444	struct kvm_vcpu *vcpu = filp->private_data;
	445	void __user argp = (void __user )arg;
	446	long r;
	447
	448	switch (ioctl) {
	449	case KVM_INTERRUPT: {
	450	struct kvm_interrupt irq;
	451	r = -EFAULT;
	452	if (copy_from_user(&irq, argp, sizeof(irq)))
	453	goto out;
	454	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	455	break;
	456	}
	457	default:
	458	r = -EINVAL;
	459	}
	460
	461	out:
	462	return r;
	463	}
	464
bbf45ba5 HB	465	long kvm_arch_vm_ioctl(struct file *filp,
	466	unsigned int ioctl, unsigned long arg)
	467	{
	468	long r;
	469
	470	switch (ioctl) {
	471	default:
367e1319	472	r = -ENOTTY;
bbf45ba5 HB	473	}
	474
	475	return r;
	476	}
	477
	478	int kvm_arch_init(void *opaque)
	479	{
	480	return 0;
	481	}
	482
	483	void kvm_arch_exit(void)
	484	{
	485	}