[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:
	case KVM_CAP_PPC_PAIRED_SINGLES:
		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 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;
	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;
	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;

	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	150	case KVM_CAP_PPC_SEGSTATE:
c10207fe	151	case KVM_CAP_PPC_PAIRED_SINGLES:
e15a1137 AG	152	r = 1;
e15a1137 AG	153	break;
588968b6 LV	154	case KVM_CAP_COALESCED_MMIO:
	155	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	156	break;
bbf45ba5 HB	157	default:
	158	r = 0;
	159	break;
	160	}
	161	return r;
	162
	163	}
	164
	165	long kvm_arch_dev_ioctl(struct file *filp,
	166	unsigned int ioctl, unsigned long arg)
	167	{
	168	return -EINVAL;
	169	}
	170
f7784b8e MT	171	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	172	struct kvm_memory_slot *memslot,
	173	struct kvm_memory_slot old,
	174	struct kvm_userspace_memory_region *mem,
	175	int user_alloc)
bbf45ba5 HB	176	{
	177	return 0;
	178	}
	179
f7784b8e MT	180	void kvm_arch_commit_memory_region(struct kvm *kvm,
	181	struct kvm_userspace_memory_region *mem,
	182	struct kvm_memory_slot old,
	183	int user_alloc)
	184	{
	185	return;
	186	}
	187
	188
34d4cb8f MT	189	void kvm_arch_flush_shadow(struct kvm *kvm)
	190	{
	191	}
	192
bbf45ba5 HB	193	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	194	{
73e75b41 HB	195	struct kvm_vcpu *vcpu;
73e75b41 HB	196	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	197	if (!IS_ERR(vcpu))
06056bfb WY	198	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	199	return vcpu;
bbf45ba5 HB	200	}
	201
	202	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	203	{
a595405d AG	204	/* Make sure we're not using the vcpu anymore */
	205	hrtimer_cancel(&vcpu->arch.dec_timer);
	206	tasklet_kill(&vcpu->arch.tasklet);
	207
73e75b41	208	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	209	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	210	}
	211
	212	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	213	{
	214	kvm_arch_vcpu_free(vcpu);
	215	}
	216
	217	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	218	{
9dd921cf	219	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	220	}
	221
	222	static void kvmppc_decrementer_func(unsigned long data)
	223	{
	224	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	225
9dd921cf	226	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	227
	228	if (waitqueue_active(&vcpu->wq)) {
	229	wake_up_interruptible(&vcpu->wq);
	230	vcpu->stat.halt_wakeup++;
	231	}
bbf45ba5 HB	232	}
bbf45ba5 HB	233
544c6761 AG	234	/*
	235	* low level hrtimer wake routine. Because this runs in hardirq context
	236	* we schedule a tasklet to do the real work.
	237	*/
	238	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	239	{
	240	struct kvm_vcpu *vcpu;
	241
	242	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	243	tasklet_schedule(&vcpu->arch.tasklet);
	244
	245	return HRTIMER_NORESTART;
	246	}
	247
bbf45ba5 HB	248	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	249	{
544c6761 AG	250	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	251	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	252	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	253
	254	return 0;
	255	}
	256
	257	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	258	{
ecc0981f	259	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	260	}
	261
	262	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	263	{
9dd921cf	264	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	265	}
	266
	267	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	268	{
9dd921cf	269	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	270	}
bbf45ba5 HB	271
d0bfb940	272	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	273	struct kvm_guest_debug *dbg)
bbf45ba5	274	{
f5d0906b	275	return -EINVAL;
bbf45ba5 HB	276	}
	277
	278	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	279	struct kvm_run *run)
	280	{
8e5b26b5	281	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	282	}
	283
	284	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	285	struct kvm_run *run)
	286	{
b104d066	287	u64 gpr;
bbf45ba5	288
8e5b26b5	289	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	290	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	291	return;
	292	}
	293
	294	if (vcpu->arch.mmio_is_bigendian) {
	295	switch (run->mmio.len) {
b104d066	296	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	297	case 4: gpr = (u32 )run->mmio.data; break;
	298	case 2: gpr = (u16 )run->mmio.data; break;
	299	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	300	}
	301	} else {
	302	/* Convert BE data from userland back to LE. */
	303	switch (run->mmio.len) {
8e5b26b5 AG	304	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	305	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	306	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	307	}
bbf45ba5 HB	308	}
8e5b26b5	309
3587d534 AG	310	if (vcpu->arch.mmio_sign_extend) {
	311	switch (run->mmio.len) {
	312	#ifdef CONFIG_PPC64
	313	case 4:
	314	gpr = (s64)(s32)gpr;
	315	break;
	316	#endif
	317	case 2:
	318	gpr = (s64)(s16)gpr;
	319	break;
	320	case 1:
	321	gpr = (s64)(s8)gpr;
	322	break;
	323	}
	324	}
	325
8e5b26b5	326	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	327
	328	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	329	case KVM_REG_GPR:
	330	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	331	break;
	332	case KVM_REG_FPR:
	333	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	334	break;
	335	case KVM_REG_QPR:
	336	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	337	break;
	338	case KVM_REG_FQPR:
	339	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	340	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	341	break;
	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
45c5eb67 HB	421	vcpu_load(vcpu);
45c5eb67 HB	422
bbf45ba5 HB	423	if (vcpu->sigset_active)
	424	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	425
	426	if (vcpu->mmio_needed) {
	427	if (!vcpu->mmio_is_write)
	428	kvmppc_complete_mmio_load(vcpu, run);
	429	vcpu->mmio_needed = 0;
	430	} else if (vcpu->arch.dcr_needed) {
	431	if (!vcpu->arch.dcr_is_write)
	432	kvmppc_complete_dcr_load(vcpu, run);
	433	vcpu->arch.dcr_needed = 0;
	434	}
	435
9dd921cf	436	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	437
	438	local_irq_disable();
	439	kvm_guest_enter();
	440	r = __kvmppc_vcpu_run(run, vcpu);
	441	kvm_guest_exit();
	442	local_irq_enable();
	443
	444	if (vcpu->sigset_active)
	445	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	446
45c5eb67 HB	447	vcpu_put(vcpu);
45c5eb67 HB	448
bbf45ba5 HB	449	return r;
	450	}
	451
	452	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	453	{
9dd921cf	454	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	455
	456	if (waitqueue_active(&vcpu->wq)) {
	457	wake_up_interruptible(&vcpu->wq);
	458	vcpu->stat.halt_wakeup++;
	459	}
	460
bbf45ba5 HB	461	return 0;
	462	}
	463
	464	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	465	struct kvm_mp_state *mp_state)
	466	{
	467	return -EINVAL;
	468	}
	469
	470	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	471	struct kvm_mp_state *mp_state)
	472	{
	473	return -EINVAL;
	474	}
	475
	476	long kvm_arch_vcpu_ioctl(struct file *filp,
	477	unsigned int ioctl, unsigned long arg)
	478	{
	479	struct kvm_vcpu *vcpu = filp->private_data;
	480	void __user argp = (void __user )arg;
	481	long r;
	482
	483	switch (ioctl) {
	484	case KVM_INTERRUPT: {
	485	struct kvm_interrupt irq;
	486	r = -EFAULT;
	487	if (copy_from_user(&irq, argp, sizeof(irq)))
	488	goto out;
	489	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
	490	break;
	491	}
	492	default:
	493	r = -EINVAL;
	494	}
	495
	496	out:
	497	return r;
	498	}
	499
bbf45ba5 HB	500	long kvm_arch_vm_ioctl(struct file *filp,
	501	unsigned int ioctl, unsigned long arg)
	502	{
	503	long r;
	504
	505	switch (ioctl) {
	506	default:
367e1319	507	r = -ENOTTY;
bbf45ba5 HB	508	}
	509
	510	return r;
	511	}
	512
	513	int kvm_arch_init(void *opaque)
	514	{
	515	return 0;
	516	}
	517
	518	void kvm_arch_exit(void)
	519	{
	520	}