[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"

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__,
		       kvmppc_get_last_inst(vcpu));
		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:
	case KVM_CAP_PPC_PAIRED_SINGLES:
	case KVM_CAP_PPC_UNSET_IRQ:
	case KVM_CAP_ENABLE_CAP:
	case KVM_CAP_PPC_OSI:
		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);
	if (!IS_ERR(vcpu))
		kvmppc_create_vcpu_debugfs(vcpu, id);
	return vcpu;
}

void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);
	tasklet_kill(&vcpu->arch.tasklet);

	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 uninitialized_var(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;
		}
	}

	if (vcpu->arch.mmio_sign_extend) {
		switch (run->mmio.len) {
#ifdef CONFIG_PPC64
		case 4:
			gpr = (s64)(s32)gpr;
			break;
#endif
		case 2:
			gpr = (s64)(s16)gpr;
			break;
		case 1:
			gpr = (s64)(s8)gpr;
			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;
#ifdef CONFIG_PPC_BOOK3S
	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;
#endif
	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;
	vcpu->arch.mmio_sign_extend = 0;

	return EMULATE_DO_MMIO;
}

/* Same as above, but sign extends */
int kvmppc_handle_loads(struct kvm_run *run, struct kvm_vcpu *vcpu,
                        unsigned int rt, unsigned int bytes, int is_bigendian)
{
	int r;

	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	vcpu->arch.mmio_sign_extend = 1;

	return r;
}

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;

	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;
	} else if (vcpu->arch.osi_needed) {
		u64 *gprs = run->osi.gprs;
		int i;

		for (i = 0; i < 32; i++)
			kvmppc_set_gpr(vcpu, i, gprs[i]);
		vcpu->arch.osi_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);

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
	if (irq->irq == KVM_INTERRUPT_UNSET)
		kvmppc_core_dequeue_external(vcpu, irq);
	else
		kvmppc_core_queue_external(vcpu, irq);

	if (waitqueue_active(&vcpu->wq)) {
		wake_up_interruptible(&vcpu->wq);
		vcpu->stat.halt_wakeup++;
	}

	return 0;
}

static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
				     struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

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);
		goto out;
	}

	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
		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	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	40	{
a1b37100	41	return !(v->arch.msr & MSR_WE) \|\| !!(v->arch.pending_exceptions);
bbf45ba5 HB	42	}
	43
	44
	45	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	46	{
	47	enum emulation_result er;
	48	int r;
	49
	50	er = kvmppc_emulate_instruction(run, vcpu);
	51	switch (er) {
	52	case EMULATE_DONE:
	53	/* Future optimization: only reload non-volatiles if they were
	54	* actually modified. */
	55	r = RESUME_GUEST_NV;
	56	break;
	57	case EMULATE_DO_MMIO:
	58	run->exit_reason = KVM_EXIT_MMIO;
	59	/* We must reload nonvolatiles because "update" load/store
	60	* instructions modify register state. */
	61	/* Future optimization: only reload non-volatiles if they were
	62	* actually modified. */
	63	r = RESUME_HOST_NV;
	64	break;
	65	case EMULATE_FAIL:
	66	/* XXX Deliver Program interrupt to guest. */
	67	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	68	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	69	r = RESUME_HOST;
	70	break;
	71	default:
	72	BUG();
	73	}
	74
	75	return r;
	76	}
	77
10474ae8	78	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	79	{
10474ae8	80	return 0;
bbf45ba5 HB	81	}
	82
	83	void kvm_arch_hardware_disable(void *garbage)
	84	{
	85	}
	86
	87	int kvm_arch_hardware_setup(void)
	88	{
	89	return 0;
	90	}
	91
	92	void kvm_arch_hardware_unsetup(void)
	93	{
	94	}
	95
	96	void kvm_arch_check_processor_compat(void *rtn)
	97	{
9dd921cf	98	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	99	}
	100
	101	struct kvm *kvm_arch_create_vm(void)
	102	{
	103	struct kvm *kvm;
	104
	105	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	106	if (!kvm)
	107	return ERR_PTR(-ENOMEM);
	108
	109	return kvm;
	110	}
	111
	112	static void kvmppc_free_vcpus(struct kvm *kvm)
	113	{
	114	unsigned int i;
988a2cae	115	struct kvm_vcpu *vcpu;
bbf45ba5	116
988a2cae GN	117	kvm_for_each_vcpu(i, vcpu, kvm)
	118	kvm_arch_vcpu_free(vcpu);
	119
	120	mutex_lock(&kvm->lock);
	121	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	122	kvm->vcpus[i] = NULL;
	123
	124	atomic_set(&kvm->online_vcpus, 0);
	125	mutex_unlock(&kvm->lock);
bbf45ba5 HB	126	}
bbf45ba5 HB	127
ad8ba2cd SY	128	void kvm_arch_sync_events(struct kvm *kvm)
	129	{
	130	}
	131
bbf45ba5 HB	132	void kvm_arch_destroy_vm(struct kvm *kvm)
	133	{
	134	kvmppc_free_vcpus(kvm);
	135	kvm_free_physmem(kvm);
64749204	136	cleanup_srcu_struct(&kvm->srcu);
bbf45ba5 HB	137	kfree(kvm);
	138	}
	139
	140	int kvm_dev_ioctl_check_extension(long ext)
	141	{
	142	int r;
	143
	144	switch (ext) {
e15a1137	145	case KVM_CAP_PPC_SEGSTATE:
c10207fe	146	case KVM_CAP_PPC_PAIRED_SINGLES:
18978768	147	case KVM_CAP_PPC_UNSET_IRQ:
71fbfd5f	148	case KVM_CAP_ENABLE_CAP:
ad0a048b	149	case KVM_CAP_PPC_OSI:
e15a1137 AG	150	r = 1;
e15a1137 AG	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;
73e75b41 HB	194	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	195	if (!IS_ERR(vcpu))
06056bfb WY	196	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	197	return vcpu;
bbf45ba5 HB	198	}
	199
	200	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	201	{
a595405d AG	202	/* Make sure we're not using the vcpu anymore */
	203	hrtimer_cancel(&vcpu->arch.dec_timer);
	204	tasklet_kill(&vcpu->arch.tasklet);
	205
73e75b41	206	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	207	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	208	}
	209
	210	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	211	{
	212	kvm_arch_vcpu_free(vcpu);
	213	}
	214
	215	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	216	{
9dd921cf	217	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	218	}
	219
	220	static void kvmppc_decrementer_func(unsigned long data)
	221	{
	222	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	223
9dd921cf	224	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	225
	226	if (waitqueue_active(&vcpu->wq)) {
	227	wake_up_interruptible(&vcpu->wq);
	228	vcpu->stat.halt_wakeup++;
	229	}
bbf45ba5 HB	230	}
bbf45ba5 HB	231
544c6761 AG	232	/*
	233	* low level hrtimer wake routine. Because this runs in hardirq context
	234	* we schedule a tasklet to do the real work.
	235	*/
	236	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	237	{
	238	struct kvm_vcpu *vcpu;
	239
	240	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	241	tasklet_schedule(&vcpu->arch.tasklet);
	242
	243	return HRTIMER_NORESTART;
	244	}
	245
bbf45ba5 HB	246	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	247	{
544c6761 AG	248	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	249	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	250	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	251
	252	return 0;
	253	}
	254
	255	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	256	{
ecc0981f	257	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	258	}
	259
	260	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	261	{
9dd921cf	262	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	263	}
	264
	265	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	266	{
9dd921cf	267	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	268	}
bbf45ba5 HB	269
d0bfb940	270	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	271	struct kvm_guest_debug *dbg)
bbf45ba5	272	{
f5d0906b	273	return -EINVAL;
bbf45ba5 HB	274	}
	275
	276	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	277	struct kvm_run *run)
	278	{
8e5b26b5	279	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	280	}
	281
	282	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	283	struct kvm_run *run)
	284	{
69b61833	285	u64 uninitialized_var(gpr);
bbf45ba5	286
8e5b26b5	287	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	288	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	289	return;
	290	}
	291
	292	if (vcpu->arch.mmio_is_bigendian) {
	293	switch (run->mmio.len) {
b104d066	294	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	295	case 4: gpr = (u32 )run->mmio.data; break;
	296	case 2: gpr = (u16 )run->mmio.data; break;
	297	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	298	}
	299	} else {
	300	/* Convert BE data from userland back to LE. */
	301	switch (run->mmio.len) {
8e5b26b5 AG	302	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	303	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	304	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	305	}
bbf45ba5 HB	306	}
8e5b26b5	307
3587d534 AG	308	if (vcpu->arch.mmio_sign_extend) {
	309	switch (run->mmio.len) {
	310	#ifdef CONFIG_PPC64
	311	case 4:
	312	gpr = (s64)(s32)gpr;
	313	break;
	314	#endif
	315	case 2:
	316	gpr = (s64)(s16)gpr;
	317	break;
	318	case 1:
	319	gpr = (s64)(s8)gpr;
	320	break;
	321	}
	322	}
	323
8e5b26b5	324	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	325
	326	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	327	case KVM_REG_GPR:
	328	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	329	break;
	330	case KVM_REG_FPR:
	331	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	332	break;
287d5611	333	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	334	case KVM_REG_QPR:
	335	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	336	break;
	337	case KVM_REG_FQPR:
	338	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	339	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	340	break;
287d5611	341	#endif
b104d066 AG	342	default:
	343	BUG();
	344	}
bbf45ba5 HB	345	}
	346
	347	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	348	unsigned int rt, unsigned int bytes, int is_bigendian)
	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 = 0;
	358
	359	vcpu->arch.io_gpr = rt;
	360	vcpu->arch.mmio_is_bigendian = is_bigendian;
	361	vcpu->mmio_needed = 1;
	362	vcpu->mmio_is_write = 0;
3587d534	363	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	364
	365	return EMULATE_DO_MMIO;
	366	}
	367
3587d534 AG	368	/* Same as above, but sign extends */
	369	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	370	unsigned int rt, unsigned int bytes, int is_bigendian)
	371	{
	372	int r;
	373
	374	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	375	vcpu->arch.mmio_sign_extend = 1;
	376
	377	return r;
	378	}
	379
bbf45ba5	380	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	381	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	382	{
	383	void *data = run->mmio.data;
	384
	385	if (bytes > sizeof(run->mmio.data)) {
	386	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	387	run->mmio.len);
	388	}
	389
	390	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	391	run->mmio.len = bytes;
	392	run->mmio.is_write = 1;
	393	vcpu->mmio_needed = 1;
	394	vcpu->mmio_is_write = 1;
	395
	396	/* Store the value at the lowest bytes in 'data'. */
	397	if (is_bigendian) {
	398	switch (bytes) {
b104d066	399	case 8: (u64 )data = val; break;
bbf45ba5 HB	400	case 4: (u32 )data = val; break;
	401	case 2: (u16 )data = val; break;
	402	case 1: (u8 )data = val; break;
	403	}
	404	} else {
	405	/* Store LE value into 'data'. */
	406	switch (bytes) {
	407	case 4: st_le32(data, val); break;
	408	case 2: st_le16(data, val); break;
	409	case 1: (u8 )data = val; break;
	410	}
	411	}
	412
	413	return EMULATE_DO_MMIO;
	414	}
	415
	416	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	417	{
	418	int r;
	419	sigset_t sigsaved;
	420
	421	if (vcpu->sigset_active)
	422	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	423
	424	if (vcpu->mmio_needed) {
	425	if (!vcpu->mmio_is_write)
	426	kvmppc_complete_mmio_load(vcpu, run);
	427	vcpu->mmio_needed = 0;
	428	} else if (vcpu->arch.dcr_needed) {
	429	if (!vcpu->arch.dcr_is_write)
	430	kvmppc_complete_dcr_load(vcpu, run);
	431	vcpu->arch.dcr_needed = 0;
ad0a048b AG	432	} else if (vcpu->arch.osi_needed) {
	433	u64 *gprs = run->osi.gprs;
	434	int i;
	435
	436	for (i = 0; i < 32; i++)
	437	kvmppc_set_gpr(vcpu, i, gprs[i]);
	438	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	439	}
bbf45ba5 HB	440
9dd921cf	441	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	442
	443	local_irq_disable();
	444	kvm_guest_enter();
	445	r = __kvmppc_vcpu_run(run, vcpu);
	446	kvm_guest_exit();
	447	local_irq_enable();
	448
	449	if (vcpu->sigset_active)
	450	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	451
	452	return r;
	453	}
	454
	455	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	456	{
18978768 AG	457	if (irq->irq == KVM_INTERRUPT_UNSET)
	458	kvmppc_core_dequeue_external(vcpu, irq);
	459	else
	460	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	461
	462	if (waitqueue_active(&vcpu->wq)) {
	463	wake_up_interruptible(&vcpu->wq);
	464	vcpu->stat.halt_wakeup++;
	465	}
	466
bbf45ba5 HB	467	return 0;
	468	}
	469
71fbfd5f AG	470	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	471	struct kvm_enable_cap *cap)
	472	{
	473	int r;
	474
	475	if (cap->flags)
	476	return -EINVAL;
	477
	478	switch (cap->cap) {
ad0a048b AG	479	case KVM_CAP_PPC_OSI:
	480	r = 0;
	481	vcpu->arch.osi_enabled = true;
	482	break;
71fbfd5f AG	483	default:
	484	r = -EINVAL;
	485	break;
	486	}
	487
	488	return r;
	489	}
	490
bbf45ba5 HB	491	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	492	struct kvm_mp_state *mp_state)
	493	{
	494	return -EINVAL;
	495	}
	496
	497	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	498	struct kvm_mp_state *mp_state)
	499	{
	500	return -EINVAL;
	501	}
	502
	503	long kvm_arch_vcpu_ioctl(struct file *filp,
	504	unsigned int ioctl, unsigned long arg)
	505	{
	506	struct kvm_vcpu *vcpu = filp->private_data;
	507	void __user argp = (void __user )arg;
	508	long r;
	509
93736624 AK	510	switch (ioctl) {
93736624 AK	511	case KVM_INTERRUPT: {
bbf45ba5 HB	512	struct kvm_interrupt irq;
	513	r = -EFAULT;
	514	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	515	goto out;
bbf45ba5	516	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	517	goto out;
bbf45ba5	518	}
19483d14	519
71fbfd5f AG	520	case KVM_ENABLE_CAP:
	521	{
	522	struct kvm_enable_cap cap;
	523	r = -EFAULT;
	524	if (copy_from_user(&cap, argp, sizeof(cap)))
	525	goto out;
	526	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	527	break;
	528	}
bbf45ba5 HB	529	default:
	530	r = -EINVAL;
	531	}
	532
	533	out:
	534	return r;
	535	}
	536
bbf45ba5 HB	537	long kvm_arch_vm_ioctl(struct file *filp,
	538	unsigned int ioctl, unsigned long arg)
	539	{
	540	long r;
	541
	542	switch (ioctl) {
	543	default:
367e1319	544	r = -ENOTTY;
bbf45ba5 HB	545	}
	546
	547	return r;
	548	}
	549
	550	int kvm_arch_init(void *opaque)
	551	{
	552	return 0;
	553	}
	554
	555	void kvm_arch_exit(void)
	556	{
	557	}