[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__,
		       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 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	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__,
c7f38f46	73	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	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:
18978768	152	case KVM_CAP_PPC_UNSET_IRQ:
71fbfd5f	153	case KVM_CAP_ENABLE_CAP:
ad0a048b	154	case KVM_CAP_PPC_OSI:
e15a1137 AG	155	r = 1;
e15a1137 AG	156	break;
588968b6 LV	157	case KVM_CAP_COALESCED_MMIO:
	158	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	159	break;
bbf45ba5 HB	160	default:
	161	r = 0;
	162	break;
	163	}
	164	return r;
	165
	166	}
	167
	168	long kvm_arch_dev_ioctl(struct file *filp,
	169	unsigned int ioctl, unsigned long arg)
	170	{
	171	return -EINVAL;
	172	}
	173
f7784b8e MT	174	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	175	struct kvm_memory_slot *memslot,
	176	struct kvm_memory_slot old,
	177	struct kvm_userspace_memory_region *mem,
	178	int user_alloc)
bbf45ba5 HB	179	{
	180	return 0;
	181	}
	182
f7784b8e MT	183	void kvm_arch_commit_memory_region(struct kvm *kvm,
	184	struct kvm_userspace_memory_region *mem,
	185	struct kvm_memory_slot old,
	186	int user_alloc)
	187	{
	188	return;
	189	}
	190
	191
34d4cb8f MT	192	void kvm_arch_flush_shadow(struct kvm *kvm)
	193	{
	194	}
	195
bbf45ba5 HB	196	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	197	{
73e75b41 HB	198	struct kvm_vcpu *vcpu;
73e75b41 HB	199	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	200	if (!IS_ERR(vcpu))
06056bfb WY	201	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	202	return vcpu;
bbf45ba5 HB	203	}
	204
	205	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	206	{
a595405d AG	207	/* Make sure we're not using the vcpu anymore */
	208	hrtimer_cancel(&vcpu->arch.dec_timer);
	209	tasklet_kill(&vcpu->arch.tasklet);
	210
73e75b41	211	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	212	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	213	}
	214
	215	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	216	{
	217	kvm_arch_vcpu_free(vcpu);
	218	}
	219
	220	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	221	{
9dd921cf	222	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	223	}
	224
	225	static void kvmppc_decrementer_func(unsigned long data)
	226	{
	227	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	228
9dd921cf	229	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	230
	231	if (waitqueue_active(&vcpu->wq)) {
	232	wake_up_interruptible(&vcpu->wq);
	233	vcpu->stat.halt_wakeup++;
	234	}
bbf45ba5 HB	235	}
bbf45ba5 HB	236
544c6761 AG	237	/*
	238	* low level hrtimer wake routine. Because this runs in hardirq context
	239	* we schedule a tasklet to do the real work.
	240	*/
	241	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	242	{
	243	struct kvm_vcpu *vcpu;
	244
	245	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	246	tasklet_schedule(&vcpu->arch.tasklet);
	247
	248	return HRTIMER_NORESTART;
	249	}
	250
bbf45ba5 HB	251	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	252	{
544c6761 AG	253	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	254	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	255	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	256
	257	return 0;
	258	}
	259
	260	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	261	{
ecc0981f	262	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	263	}
	264
	265	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	266	{
9dd921cf	267	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	268	}
	269
	270	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	271	{
9dd921cf	272	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	273	}
bbf45ba5 HB	274
d0bfb940	275	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	276	struct kvm_guest_debug *dbg)
bbf45ba5	277	{
f5d0906b	278	return -EINVAL;
bbf45ba5 HB	279	}
	280
	281	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	282	struct kvm_run *run)
	283	{
8e5b26b5	284	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	285	}
	286
	287	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	288	struct kvm_run *run)
	289	{
b104d066	290	u64 gpr;
bbf45ba5	291
8e5b26b5	292	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	293	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	294	return;
	295	}
	296
	297	if (vcpu->arch.mmio_is_bigendian) {
	298	switch (run->mmio.len) {
b104d066	299	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	300	case 4: gpr = (u32 )run->mmio.data; break;
	301	case 2: gpr = (u16 )run->mmio.data; break;
	302	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	303	}
	304	} else {
	305	/* Convert BE data from userland back to LE. */
	306	switch (run->mmio.len) {
8e5b26b5 AG	307	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	308	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	309	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	310	}
bbf45ba5 HB	311	}
8e5b26b5	312
3587d534 AG	313	if (vcpu->arch.mmio_sign_extend) {
	314	switch (run->mmio.len) {
	315	#ifdef CONFIG_PPC64
	316	case 4:
	317	gpr = (s64)(s32)gpr;
	318	break;
	319	#endif
	320	case 2:
	321	gpr = (s64)(s16)gpr;
	322	break;
	323	case 1:
	324	gpr = (s64)(s8)gpr;
	325	break;
	326	}
	327	}
	328
8e5b26b5	329	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	330
	331	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	332	case KVM_REG_GPR:
	333	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	334	break;
	335	case KVM_REG_FPR:
	336	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	337	break;
287d5611	338	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	339	case KVM_REG_QPR:
	340	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	341	break;
	342	case KVM_REG_FQPR:
	343	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	344	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	345	break;
287d5611	346	#endif
b104d066 AG	347	default:
	348	BUG();
	349	}
bbf45ba5 HB	350	}
	351
	352	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	353	unsigned int rt, unsigned int bytes, int is_bigendian)
	354	{
	355	if (bytes > sizeof(run->mmio.data)) {
	356	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	357	run->mmio.len);
	358	}
	359
	360	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	361	run->mmio.len = bytes;
	362	run->mmio.is_write = 0;
	363
	364	vcpu->arch.io_gpr = rt;
	365	vcpu->arch.mmio_is_bigendian = is_bigendian;
	366	vcpu->mmio_needed = 1;
	367	vcpu->mmio_is_write = 0;
3587d534	368	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	369
	370	return EMULATE_DO_MMIO;
	371	}
	372
3587d534 AG	373	/* Same as above, but sign extends */
	374	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	375	unsigned int rt, unsigned int bytes, int is_bigendian)
	376	{
	377	int r;
	378
	379	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	380	vcpu->arch.mmio_sign_extend = 1;
	381
	382	return r;
	383	}
	384
bbf45ba5	385	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	386	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	387	{
	388	void *data = run->mmio.data;
	389
	390	if (bytes > sizeof(run->mmio.data)) {
	391	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	392	run->mmio.len);
	393	}
	394
	395	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	396	run->mmio.len = bytes;
	397	run->mmio.is_write = 1;
	398	vcpu->mmio_needed = 1;
	399	vcpu->mmio_is_write = 1;
	400
	401	/* Store the value at the lowest bytes in 'data'. */
	402	if (is_bigendian) {
	403	switch (bytes) {
b104d066	404	case 8: (u64 )data = val; break;
bbf45ba5 HB	405	case 4: (u32 )data = val; break;
	406	case 2: (u16 )data = val; break;
	407	case 1: (u8 )data = val; break;
	408	}
	409	} else {
	410	/* Store LE value into 'data'. */
	411	switch (bytes) {
	412	case 4: st_le32(data, val); break;
	413	case 2: st_le16(data, val); break;
	414	case 1: (u8 )data = val; break;
	415	}
	416	}
	417
	418	return EMULATE_DO_MMIO;
	419	}
	420
	421	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	422	{
	423	int r;
	424	sigset_t sigsaved;
	425
	426	if (vcpu->sigset_active)
	427	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	428
	429	if (vcpu->mmio_needed) {
	430	if (!vcpu->mmio_is_write)
	431	kvmppc_complete_mmio_load(vcpu, run);
	432	vcpu->mmio_needed = 0;
	433	} else if (vcpu->arch.dcr_needed) {
	434	if (!vcpu->arch.dcr_is_write)
	435	kvmppc_complete_dcr_load(vcpu, run);
	436	vcpu->arch.dcr_needed = 0;
ad0a048b AG	437	} else if (vcpu->arch.osi_needed) {
	438	u64 *gprs = run->osi.gprs;
	439	int i;
	440
	441	for (i = 0; i < 32; i++)
	442	kvmppc_set_gpr(vcpu, i, gprs[i]);
	443	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	444	}
bbf45ba5 HB	445
9dd921cf	446	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	447
	448	local_irq_disable();
	449	kvm_guest_enter();
	450	r = __kvmppc_vcpu_run(run, vcpu);
	451	kvm_guest_exit();
	452	local_irq_enable();
	453
	454	if (vcpu->sigset_active)
	455	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	456
	457	return r;
	458	}
	459
	460	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	461	{
18978768 AG	462	if (irq->irq == KVM_INTERRUPT_UNSET)
	463	kvmppc_core_dequeue_external(vcpu, irq);
	464	else
	465	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	466
	467	if (waitqueue_active(&vcpu->wq)) {
	468	wake_up_interruptible(&vcpu->wq);
	469	vcpu->stat.halt_wakeup++;
	470	}
	471
bbf45ba5 HB	472	return 0;
	473	}
	474
71fbfd5f AG	475	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	476	struct kvm_enable_cap *cap)
	477	{
	478	int r;
	479
	480	if (cap->flags)
	481	return -EINVAL;
	482
	483	switch (cap->cap) {
ad0a048b AG	484	case KVM_CAP_PPC_OSI:
	485	r = 0;
	486	vcpu->arch.osi_enabled = true;
	487	break;
71fbfd5f AG	488	default:
	489	r = -EINVAL;
	490	break;
	491	}
	492
	493	return r;
	494	}
	495
bbf45ba5 HB	496	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	497	struct kvm_mp_state *mp_state)
	498	{
	499	return -EINVAL;
	500	}
	501
	502	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	503	struct kvm_mp_state *mp_state)
	504	{
	505	return -EINVAL;
	506	}
	507
	508	long kvm_arch_vcpu_ioctl(struct file *filp,
	509	unsigned int ioctl, unsigned long arg)
	510	{
	511	struct kvm_vcpu *vcpu = filp->private_data;
	512	void __user argp = (void __user )arg;
	513	long r;
	514
93736624 AK	515	switch (ioctl) {
93736624 AK	516	case KVM_INTERRUPT: {
bbf45ba5 HB	517	struct kvm_interrupt irq;
	518	r = -EFAULT;
	519	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	520	goto out;
bbf45ba5	521	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	522	goto out;
bbf45ba5	523	}
19483d14	524
71fbfd5f AG	525	case KVM_ENABLE_CAP:
	526	{
	527	struct kvm_enable_cap cap;
	528	r = -EFAULT;
	529	if (copy_from_user(&cap, argp, sizeof(cap)))
	530	goto out;
	531	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	532	break;
	533	}
bbf45ba5 HB	534	default:
	535	r = -EINVAL;
	536	}
	537
	538	out:
	539	return r;
	540	}
	541
bbf45ba5 HB	542	long kvm_arch_vm_ioctl(struct file *filp,
	543	unsigned int ioctl, unsigned long arg)
	544	{
	545	long r;
	546
	547	switch (ioctl) {
	548	default:
367e1319	549	r = -ENOTTY;
bbf45ba5 HB	550	}
	551
	552	return r;
	553	}
	554
	555	int kvm_arch_init(void *opaque)
	556	{
	557	return 0;
	558	}
	559
	560	void kvm_arch_exit(void)
	561	{
	562	}