[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_FEATURES:
		r = HC_EV_SUCCESS;

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