[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.shared->msr & MSR_WE) ||
	       !!(v->arch.pending_exceptions);
}

int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
{
	int nr = kvmppc_get_gpr(vcpu, 11);
	int r;
	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	unsigned long r2 = 0;

	if (!(vcpu->arch.shared->msr & MSR_SF)) {
		/* 32 bit mode */
		param1 &= 0xffffffff;
		param2 &= 0xffffffff;
		param3 &= 0xffffffff;
		param4 &= 0xffffffff;
	}

	switch (nr) {
	case HC_VENDOR_KVM | KVM_HC_PPC_MAP_MAGIC_PAGE:
	{
		vcpu->arch.magic_page_pa = param1;
		vcpu->arch.magic_page_ea = param2;

		r = HC_EV_SUCCESS;
		break;
	}
	case HC_VENDOR_KVM | KVM_HC_FEATURES:
		r = HC_EV_SUCCESS;
#if defined(CONFIG_PPC_BOOK3S) /* XXX Missing magic page on BookE */
		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif

		/* Second return value is in r4 */
		kvmppc_set_gpr(vcpu, 4, r2);
		break;
	default:
		r = HC_EV_UNIMPLEMENTED;
		break;
	}

	return r;
}

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	{
666e7252 AG	41	return !(v->arch.shared->msr & MSR_WE) \|\|
666e7252 AG	42	!!(v->arch.pending_exceptions);
bbf45ba5 HB	43	}
bbf45ba5 HB	44
2a342ed5 AG	45	int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
	46	{
	47	int nr = kvmppc_get_gpr(vcpu, 11);
	48	int r;
	49	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	50	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	51	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	52	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	53	unsigned long r2 = 0;
	54
	55	if (!(vcpu->arch.shared->msr & MSR_SF)) {
	56	/* 32 bit mode */
	57	param1 &= 0xffffffff;
	58	param2 &= 0xffffffff;
	59	param3 &= 0xffffffff;
	60	param4 &= 0xffffffff;
	61	}
	62
	63	switch (nr) {
5fc87407 AG	64	case HC_VENDOR_KVM \| KVM_HC_PPC_MAP_MAGIC_PAGE:
	65	{
	66	vcpu->arch.magic_page_pa = param1;
	67	vcpu->arch.magic_page_ea = param2;
	68
	69	r = HC_EV_SUCCESS;
	70	break;
	71	}
2a342ed5 AG	72	case HC_VENDOR_KVM \| KVM_HC_FEATURES:
2a342ed5 AG	73	r = HC_EV_SUCCESS;
5fc87407 AG	74	#if defined(CONFIG_PPC_BOOK3S) /* XXX Missing magic page on BookE */
	75	r2 \|= (1 << KVM_FEATURE_MAGIC_PAGE);
	76	#endif
2a342ed5 AG	77
	78	/* Second return value is in r4 */
	79	kvmppc_set_gpr(vcpu, 4, r2);
	80	break;
	81	default:
	82	r = HC_EV_UNIMPLEMENTED;
	83	break;
	84	}
	85
	86	return r;
	87	}
bbf45ba5 HB	88
	89	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	90	{
	91	enum emulation_result er;
	92	int r;
	93
	94	er = kvmppc_emulate_instruction(run, vcpu);
	95	switch (er) {
	96	case EMULATE_DONE:
	97	/* Future optimization: only reload non-volatiles if they were
	98	* actually modified. */
	99	r = RESUME_GUEST_NV;
	100	break;
	101	case EMULATE_DO_MMIO:
	102	run->exit_reason = KVM_EXIT_MMIO;
	103	/* We must reload nonvolatiles because "update" load/store
	104	* instructions modify register state. */
	105	/* Future optimization: only reload non-volatiles if they were
	106	* actually modified. */
	107	r = RESUME_HOST_NV;
	108	break;
	109	case EMULATE_FAIL:
	110	/* XXX Deliver Program interrupt to guest. */
	111	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	112	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	113	r = RESUME_HOST;
	114	break;
	115	default:
	116	BUG();
	117	}
	118
	119	return r;
	120	}
	121
10474ae8	122	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	123	{
10474ae8	124	return 0;
bbf45ba5 HB	125	}
	126
	127	void kvm_arch_hardware_disable(void *garbage)
	128	{
	129	}
	130
	131	int kvm_arch_hardware_setup(void)
	132	{
	133	return 0;
	134	}
	135
	136	void kvm_arch_hardware_unsetup(void)
	137	{
	138	}
	139
	140	void kvm_arch_check_processor_compat(void *rtn)
	141	{
9dd921cf	142	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	143	}
	144
	145	struct kvm *kvm_arch_create_vm(void)
	146	{
	147	struct kvm *kvm;
	148
	149	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	150	if (!kvm)
	151	return ERR_PTR(-ENOMEM);
	152
	153	return kvm;
	154	}
	155
	156	static void kvmppc_free_vcpus(struct kvm *kvm)
	157	{
	158	unsigned int i;
988a2cae	159	struct kvm_vcpu *vcpu;
bbf45ba5	160
988a2cae GN	161	kvm_for_each_vcpu(i, vcpu, kvm)
	162	kvm_arch_vcpu_free(vcpu);
	163
	164	mutex_lock(&kvm->lock);
	165	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	166	kvm->vcpus[i] = NULL;
	167
	168	atomic_set(&kvm->online_vcpus, 0);
	169	mutex_unlock(&kvm->lock);
bbf45ba5 HB	170	}
bbf45ba5 HB	171
ad8ba2cd SY	172	void kvm_arch_sync_events(struct kvm *kvm)
	173	{
	174	}
	175
bbf45ba5 HB	176	void kvm_arch_destroy_vm(struct kvm *kvm)
	177	{
	178	kvmppc_free_vcpus(kvm);
	179	kvm_free_physmem(kvm);
64749204	180	cleanup_srcu_struct(&kvm->srcu);
bbf45ba5 HB	181	kfree(kvm);
	182	}
	183
	184	int kvm_dev_ioctl_check_extension(long ext)
	185	{
	186	int r;
	187
	188	switch (ext) {
e15a1137	189	case KVM_CAP_PPC_SEGSTATE:
c10207fe	190	case KVM_CAP_PPC_PAIRED_SINGLES:
18978768	191	case KVM_CAP_PPC_UNSET_IRQ:
71fbfd5f	192	case KVM_CAP_ENABLE_CAP:
ad0a048b	193	case KVM_CAP_PPC_OSI:
e15a1137 AG	194	r = 1;
e15a1137 AG	195	break;
588968b6 LV	196	case KVM_CAP_COALESCED_MMIO:
	197	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	198	break;
bbf45ba5 HB	199	default:
	200	r = 0;
	201	break;
	202	}
	203	return r;
	204
	205	}
	206
	207	long kvm_arch_dev_ioctl(struct file *filp,
	208	unsigned int ioctl, unsigned long arg)
	209	{
	210	return -EINVAL;
	211	}
	212
f7784b8e MT	213	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	214	struct kvm_memory_slot *memslot,
	215	struct kvm_memory_slot old,
	216	struct kvm_userspace_memory_region *mem,
	217	int user_alloc)
bbf45ba5 HB	218	{
	219	return 0;
	220	}
	221
f7784b8e MT	222	void kvm_arch_commit_memory_region(struct kvm *kvm,
	223	struct kvm_userspace_memory_region *mem,
	224	struct kvm_memory_slot old,
	225	int user_alloc)
	226	{
	227	return;
	228	}
	229
	230
34d4cb8f MT	231	void kvm_arch_flush_shadow(struct kvm *kvm)
	232	{
	233	}
	234
bbf45ba5 HB	235	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	236	{
73e75b41 HB	237	struct kvm_vcpu *vcpu;
73e75b41 HB	238	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	239	if (!IS_ERR(vcpu))
06056bfb WY	240	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	241	return vcpu;
bbf45ba5 HB	242	}
	243
	244	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	245	{
a595405d AG	246	/* Make sure we're not using the vcpu anymore */
	247	hrtimer_cancel(&vcpu->arch.dec_timer);
	248	tasklet_kill(&vcpu->arch.tasklet);
	249
73e75b41	250	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	251	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	252	}
	253
	254	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	255	{
	256	kvm_arch_vcpu_free(vcpu);
	257	}
	258
	259	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	260	{
9dd921cf	261	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	262	}
	263
	264	static void kvmppc_decrementer_func(unsigned long data)
	265	{
	266	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	267
9dd921cf	268	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	269
	270	if (waitqueue_active(&vcpu->wq)) {
	271	wake_up_interruptible(&vcpu->wq);
	272	vcpu->stat.halt_wakeup++;
	273	}
bbf45ba5 HB	274	}
bbf45ba5 HB	275
544c6761 AG	276	/*
	277	* low level hrtimer wake routine. Because this runs in hardirq context
	278	* we schedule a tasklet to do the real work.
	279	*/
	280	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	281	{
	282	struct kvm_vcpu *vcpu;
	283
	284	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	285	tasklet_schedule(&vcpu->arch.tasklet);
	286
	287	return HRTIMER_NORESTART;
	288	}
	289
bbf45ba5 HB	290	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	291	{
544c6761 AG	292	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	293	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	294	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	295
	296	return 0;
	297	}
	298
	299	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	300	{
ecc0981f	301	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	302	}
	303
	304	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	305	{
9dd921cf	306	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	307	}
	308
	309	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	310	{
9dd921cf	311	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	312	}
bbf45ba5 HB	313
d0bfb940	314	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	315	struct kvm_guest_debug *dbg)
bbf45ba5	316	{
f5d0906b	317	return -EINVAL;
bbf45ba5 HB	318	}
	319
	320	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	321	struct kvm_run *run)
	322	{
8e5b26b5	323	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	324	}
	325
	326	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	327	struct kvm_run *run)
	328	{
69b61833	329	u64 uninitialized_var(gpr);
bbf45ba5	330
8e5b26b5	331	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	332	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	333	return;
	334	}
	335
	336	if (vcpu->arch.mmio_is_bigendian) {
	337	switch (run->mmio.len) {
b104d066	338	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	339	case 4: gpr = (u32 )run->mmio.data; break;
	340	case 2: gpr = (u16 )run->mmio.data; break;
	341	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	342	}
	343	} else {
	344	/* Convert BE data from userland back to LE. */
	345	switch (run->mmio.len) {
8e5b26b5 AG	346	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	347	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	348	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	349	}
bbf45ba5 HB	350	}
8e5b26b5	351
3587d534 AG	352	if (vcpu->arch.mmio_sign_extend) {
	353	switch (run->mmio.len) {
	354	#ifdef CONFIG_PPC64
	355	case 4:
	356	gpr = (s64)(s32)gpr;
	357	break;
	358	#endif
	359	case 2:
	360	gpr = (s64)(s16)gpr;
	361	break;
	362	case 1:
	363	gpr = (s64)(s8)gpr;
	364	break;
	365	}
	366	}
	367
8e5b26b5	368	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	369
	370	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	371	case KVM_REG_GPR:
	372	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	373	break;
	374	case KVM_REG_FPR:
	375	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	376	break;
287d5611	377	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	378	case KVM_REG_QPR:
	379	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	380	break;
	381	case KVM_REG_FQPR:
	382	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	383	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	384	break;
287d5611	385	#endif
b104d066 AG	386	default:
	387	BUG();
	388	}
bbf45ba5 HB	389	}
	390
	391	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	392	unsigned int rt, unsigned int bytes, int is_bigendian)
	393	{
	394	if (bytes > sizeof(run->mmio.data)) {
	395	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	396	run->mmio.len);
	397	}
	398
	399	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	400	run->mmio.len = bytes;
	401	run->mmio.is_write = 0;
	402
	403	vcpu->arch.io_gpr = rt;
	404	vcpu->arch.mmio_is_bigendian = is_bigendian;
	405	vcpu->mmio_needed = 1;
	406	vcpu->mmio_is_write = 0;
3587d534	407	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	408
	409	return EMULATE_DO_MMIO;
	410	}
	411
3587d534 AG	412	/* Same as above, but sign extends */
	413	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	414	unsigned int rt, unsigned int bytes, int is_bigendian)
	415	{
	416	int r;
	417
	418	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	419	vcpu->arch.mmio_sign_extend = 1;
	420
	421	return r;
	422	}
	423
bbf45ba5	424	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	425	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	426	{
	427	void *data = run->mmio.data;
	428
	429	if (bytes > sizeof(run->mmio.data)) {
	430	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	431	run->mmio.len);
	432	}
	433
	434	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	435	run->mmio.len = bytes;
	436	run->mmio.is_write = 1;
	437	vcpu->mmio_needed = 1;
	438	vcpu->mmio_is_write = 1;
	439
	440	/* Store the value at the lowest bytes in 'data'. */
	441	if (is_bigendian) {
	442	switch (bytes) {
b104d066	443	case 8: (u64 )data = val; break;
bbf45ba5 HB	444	case 4: (u32 )data = val; break;
	445	case 2: (u16 )data = val; break;
	446	case 1: (u8 )data = val; break;
	447	}
	448	} else {
	449	/* Store LE value into 'data'. */
	450	switch (bytes) {
	451	case 4: st_le32(data, val); break;
	452	case 2: st_le16(data, val); break;
	453	case 1: (u8 )data = val; break;
	454	}
	455	}
	456
	457	return EMULATE_DO_MMIO;
	458	}
	459
	460	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	461	{
	462	int r;
	463	sigset_t sigsaved;
	464
	465	if (vcpu->sigset_active)
	466	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	467
	468	if (vcpu->mmio_needed) {
	469	if (!vcpu->mmio_is_write)
	470	kvmppc_complete_mmio_load(vcpu, run);
	471	vcpu->mmio_needed = 0;
	472	} else if (vcpu->arch.dcr_needed) {
	473	if (!vcpu->arch.dcr_is_write)
	474	kvmppc_complete_dcr_load(vcpu, run);
	475	vcpu->arch.dcr_needed = 0;
ad0a048b AG	476	} else if (vcpu->arch.osi_needed) {
	477	u64 *gprs = run->osi.gprs;
	478	int i;
	479
	480	for (i = 0; i < 32; i++)
	481	kvmppc_set_gpr(vcpu, i, gprs[i]);
	482	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	483	}
bbf45ba5 HB	484
9dd921cf	485	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	486
	487	local_irq_disable();
	488	kvm_guest_enter();
	489	r = __kvmppc_vcpu_run(run, vcpu);
	490	kvm_guest_exit();
	491	local_irq_enable();
	492
	493	if (vcpu->sigset_active)
	494	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	495
	496	return r;
	497	}
	498
	499	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	500	{
18978768 AG	501	if (irq->irq == KVM_INTERRUPT_UNSET)
	502	kvmppc_core_dequeue_external(vcpu, irq);
	503	else
	504	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	505
	506	if (waitqueue_active(&vcpu->wq)) {
	507	wake_up_interruptible(&vcpu->wq);
	508	vcpu->stat.halt_wakeup++;
	509	}
	510
bbf45ba5 HB	511	return 0;
	512	}
	513
71fbfd5f AG	514	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	515	struct kvm_enable_cap *cap)
	516	{
	517	int r;
	518
	519	if (cap->flags)
	520	return -EINVAL;
	521
	522	switch (cap->cap) {
ad0a048b AG	523	case KVM_CAP_PPC_OSI:
	524	r = 0;
	525	vcpu->arch.osi_enabled = true;
	526	break;
71fbfd5f AG	527	default:
	528	r = -EINVAL;
	529	break;
	530	}
	531
	532	return r;
	533	}
	534
bbf45ba5 HB	535	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	536	struct kvm_mp_state *mp_state)
	537	{
	538	return -EINVAL;
	539	}
	540
	541	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	542	struct kvm_mp_state *mp_state)
	543	{
	544	return -EINVAL;
	545	}
	546
	547	long kvm_arch_vcpu_ioctl(struct file *filp,
	548	unsigned int ioctl, unsigned long arg)
	549	{
	550	struct kvm_vcpu *vcpu = filp->private_data;
	551	void __user argp = (void __user )arg;
	552	long r;
	553
93736624 AK	554	switch (ioctl) {
93736624 AK	555	case KVM_INTERRUPT: {
bbf45ba5 HB	556	struct kvm_interrupt irq;
	557	r = -EFAULT;
	558	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	559	goto out;
bbf45ba5	560	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	561	goto out;
bbf45ba5	562	}
19483d14	563
71fbfd5f AG	564	case KVM_ENABLE_CAP:
	565	{
	566	struct kvm_enable_cap cap;
	567	r = -EFAULT;
	568	if (copy_from_user(&cap, argp, sizeof(cap)))
	569	goto out;
	570	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	571	break;
	572	}
bbf45ba5 HB	573	default:
	574	r = -EINVAL;
	575	}
	576
	577	out:
	578	return r;
	579	}
	580
bbf45ba5 HB	581	long kvm_arch_vm_ioctl(struct file *filp,
	582	unsigned int ioctl, unsigned long arg)
	583	{
	584	long r;
	585
	586	switch (ioctl) {
	587	default:
367e1319	588	r = -ENOTTY;
bbf45ba5 HB	589	}
	590
	591	return r;
	592	}
	593
	594	int kvm_arch_init(void *opaque)
	595	{
	596	return 0;
	597	}
	598
	599	void kvm_arch_exit(void)
	600	{
	601	}