[mirror_ubuntu-zesty-kernel.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:
	case KVM_CAP_PPC_GET_PVINFO:
		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;
}

static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
	u32 inst_lis = 0x3c000000;
	u32 inst_ori = 0x60000000;
	u32 inst_nop = 0x60000000;
	u32 inst_sc = 0x44000002;
	u32 inst_imm_mask = 0xffff;

	/*
	 * The hypercall to get into KVM from within guest context is as
	 * follows:
	 *
	 *    lis r0, r0, KVM_SC_MAGIC_R0@h
	 *    ori r0, KVM_SC_MAGIC_R0@l
	 *    sc
	 *    nop
	 */
	pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
	pvinfo->hcall[2] = inst_sc;
	pvinfo->hcall[3] = inst_nop;

	return 0;
}

long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
	void __user *argp = (void __user *)arg;
	long r;

	switch (ioctl) {
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
	default:
		r = -ENOTTY;
	}

out:
	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:
15711e9c	194	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	195	r = 1;
e15a1137 AG	196	break;
588968b6 LV	197	case KVM_CAP_COALESCED_MMIO:
	198	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	199	break;
bbf45ba5 HB	200	default:
	201	r = 0;
	202	break;
	203	}
	204	return r;
	205
	206	}
	207
	208	long kvm_arch_dev_ioctl(struct file *filp,
	209	unsigned int ioctl, unsigned long arg)
	210	{
	211	return -EINVAL;
	212	}
	213
f7784b8e MT	214	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	215	struct kvm_memory_slot *memslot,
	216	struct kvm_memory_slot old,
	217	struct kvm_userspace_memory_region *mem,
	218	int user_alloc)
bbf45ba5 HB	219	{
	220	return 0;
	221	}
	222
f7784b8e MT	223	void kvm_arch_commit_memory_region(struct kvm *kvm,
	224	struct kvm_userspace_memory_region *mem,
	225	struct kvm_memory_slot old,
	226	int user_alloc)
	227	{
	228	return;
	229	}
	230
	231
34d4cb8f MT	232	void kvm_arch_flush_shadow(struct kvm *kvm)
	233	{
	234	}
	235
bbf45ba5 HB	236	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	237	{
73e75b41 HB	238	struct kvm_vcpu *vcpu;
73e75b41 HB	239	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	240	if (!IS_ERR(vcpu))
06056bfb WY	241	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	242	return vcpu;
bbf45ba5 HB	243	}
	244
	245	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	246	{
a595405d AG	247	/* Make sure we're not using the vcpu anymore */
	248	hrtimer_cancel(&vcpu->arch.dec_timer);
	249	tasklet_kill(&vcpu->arch.tasklet);
	250
73e75b41	251	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	252	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	253	}
	254
	255	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	256	{
	257	kvm_arch_vcpu_free(vcpu);
	258	}
	259
	260	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	261	{
9dd921cf	262	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	263	}
	264
	265	static void kvmppc_decrementer_func(unsigned long data)
	266	{
	267	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	268
9dd921cf	269	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	270
	271	if (waitqueue_active(&vcpu->wq)) {
	272	wake_up_interruptible(&vcpu->wq);
	273	vcpu->stat.halt_wakeup++;
	274	}
bbf45ba5 HB	275	}
bbf45ba5 HB	276
544c6761 AG	277	/*
	278	* low level hrtimer wake routine. Because this runs in hardirq context
	279	* we schedule a tasklet to do the real work.
	280	*/
	281	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	282	{
	283	struct kvm_vcpu *vcpu;
	284
	285	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	286	tasklet_schedule(&vcpu->arch.tasklet);
	287
	288	return HRTIMER_NORESTART;
	289	}
	290
bbf45ba5 HB	291	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	292	{
544c6761 AG	293	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	294	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	295	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	296
	297	return 0;
	298	}
	299
	300	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	301	{
ecc0981f	302	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	303	}
	304
	305	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	306	{
9dd921cf	307	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	308	}
	309
	310	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	311	{
9dd921cf	312	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	313	}
bbf45ba5 HB	314
d0bfb940	315	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	316	struct kvm_guest_debug *dbg)
bbf45ba5	317	{
f5d0906b	318	return -EINVAL;
bbf45ba5 HB	319	}
	320
	321	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	322	struct kvm_run *run)
	323	{
8e5b26b5	324	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	325	}
	326
	327	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	328	struct kvm_run *run)
	329	{
69b61833	330	u64 uninitialized_var(gpr);
bbf45ba5	331
8e5b26b5	332	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	333	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	334	return;
	335	}
	336
	337	if (vcpu->arch.mmio_is_bigendian) {
	338	switch (run->mmio.len) {
b104d066	339	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	340	case 4: gpr = (u32 )run->mmio.data; break;
	341	case 2: gpr = (u16 )run->mmio.data; break;
	342	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	343	}
	344	} else {
	345	/* Convert BE data from userland back to LE. */
	346	switch (run->mmio.len) {
8e5b26b5 AG	347	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	348	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	349	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	350	}
bbf45ba5 HB	351	}
8e5b26b5	352
3587d534 AG	353	if (vcpu->arch.mmio_sign_extend) {
	354	switch (run->mmio.len) {
	355	#ifdef CONFIG_PPC64
	356	case 4:
	357	gpr = (s64)(s32)gpr;
	358	break;
	359	#endif
	360	case 2:
	361	gpr = (s64)(s16)gpr;
	362	break;
	363	case 1:
	364	gpr = (s64)(s8)gpr;
	365	break;
	366	}
	367	}
	368
8e5b26b5	369	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	370
	371	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	372	case KVM_REG_GPR:
	373	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	374	break;
	375	case KVM_REG_FPR:
	376	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	377	break;
287d5611	378	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	379	case KVM_REG_QPR:
	380	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	381	break;
	382	case KVM_REG_FQPR:
	383	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	384	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	385	break;
287d5611	386	#endif
b104d066 AG	387	default:
	388	BUG();
	389	}
bbf45ba5 HB	390	}
	391
	392	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	393	unsigned int rt, unsigned int bytes, int is_bigendian)
	394	{
	395	if (bytes > sizeof(run->mmio.data)) {
	396	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	397	run->mmio.len);
	398	}
	399
	400	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	401	run->mmio.len = bytes;
	402	run->mmio.is_write = 0;
	403
	404	vcpu->arch.io_gpr = rt;
	405	vcpu->arch.mmio_is_bigendian = is_bigendian;
	406	vcpu->mmio_needed = 1;
	407	vcpu->mmio_is_write = 0;
3587d534	408	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	409
	410	return EMULATE_DO_MMIO;
	411	}
	412
3587d534 AG	413	/* Same as above, but sign extends */
	414	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	415	unsigned int rt, unsigned int bytes, int is_bigendian)
	416	{
	417	int r;
	418
	419	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	420	vcpu->arch.mmio_sign_extend = 1;
	421
	422	return r;
	423	}
	424
bbf45ba5	425	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	426	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	427	{
	428	void *data = run->mmio.data;
	429
	430	if (bytes > sizeof(run->mmio.data)) {
	431	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	432	run->mmio.len);
	433	}
	434
	435	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	436	run->mmio.len = bytes;
	437	run->mmio.is_write = 1;
	438	vcpu->mmio_needed = 1;
	439	vcpu->mmio_is_write = 1;
	440
	441	/* Store the value at the lowest bytes in 'data'. */
	442	if (is_bigendian) {
	443	switch (bytes) {
b104d066	444	case 8: (u64 )data = val; break;
bbf45ba5 HB	445	case 4: (u32 )data = val; break;
	446	case 2: (u16 )data = val; break;
	447	case 1: (u8 )data = val; break;
	448	}
	449	} else {
	450	/* Store LE value into 'data'. */
	451	switch (bytes) {
	452	case 4: st_le32(data, val); break;
	453	case 2: st_le16(data, val); break;
	454	case 1: (u8 )data = val; break;
	455	}
	456	}
	457
	458	return EMULATE_DO_MMIO;
	459	}
	460
	461	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	462	{
	463	int r;
	464	sigset_t sigsaved;
	465
	466	if (vcpu->sigset_active)
	467	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	468
	469	if (vcpu->mmio_needed) {
	470	if (!vcpu->mmio_is_write)
	471	kvmppc_complete_mmio_load(vcpu, run);
	472	vcpu->mmio_needed = 0;
	473	} else if (vcpu->arch.dcr_needed) {
	474	if (!vcpu->arch.dcr_is_write)
	475	kvmppc_complete_dcr_load(vcpu, run);
	476	vcpu->arch.dcr_needed = 0;
ad0a048b AG	477	} else if (vcpu->arch.osi_needed) {
	478	u64 *gprs = run->osi.gprs;
	479	int i;
	480
	481	for (i = 0; i < 32; i++)
	482	kvmppc_set_gpr(vcpu, i, gprs[i]);
	483	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	484	}
bbf45ba5 HB	485
9dd921cf	486	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	487
	488	local_irq_disable();
	489	kvm_guest_enter();
	490	r = __kvmppc_vcpu_run(run, vcpu);
	491	kvm_guest_exit();
	492	local_irq_enable();
	493
	494	if (vcpu->sigset_active)
	495	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	496
	497	return r;
	498	}
	499
	500	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	501	{
18978768 AG	502	if (irq->irq == KVM_INTERRUPT_UNSET)
	503	kvmppc_core_dequeue_external(vcpu, irq);
	504	else
	505	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	506
	507	if (waitqueue_active(&vcpu->wq)) {
	508	wake_up_interruptible(&vcpu->wq);
	509	vcpu->stat.halt_wakeup++;
	510	}
	511
bbf45ba5 HB	512	return 0;
	513	}
	514
71fbfd5f AG	515	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	516	struct kvm_enable_cap *cap)
	517	{
	518	int r;
	519
	520	if (cap->flags)
	521	return -EINVAL;
	522
	523	switch (cap->cap) {
ad0a048b AG	524	case KVM_CAP_PPC_OSI:
	525	r = 0;
	526	vcpu->arch.osi_enabled = true;
	527	break;
71fbfd5f AG	528	default:
	529	r = -EINVAL;
	530	break;
	531	}
	532
	533	return r;
	534	}
	535
bbf45ba5 HB	536	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	537	struct kvm_mp_state *mp_state)
	538	{
	539	return -EINVAL;
	540	}
	541
	542	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	543	struct kvm_mp_state *mp_state)
	544	{
	545	return -EINVAL;
	546	}
	547
	548	long kvm_arch_vcpu_ioctl(struct file *filp,
	549	unsigned int ioctl, unsigned long arg)
	550	{
	551	struct kvm_vcpu *vcpu = filp->private_data;
	552	void __user argp = (void __user )arg;
	553	long r;
	554
93736624 AK	555	switch (ioctl) {
93736624 AK	556	case KVM_INTERRUPT: {
bbf45ba5 HB	557	struct kvm_interrupt irq;
	558	r = -EFAULT;
	559	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	560	goto out;
bbf45ba5	561	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	562	goto out;
bbf45ba5	563	}
19483d14	564
71fbfd5f AG	565	case KVM_ENABLE_CAP:
	566	{
	567	struct kvm_enable_cap cap;
	568	r = -EFAULT;
	569	if (copy_from_user(&cap, argp, sizeof(cap)))
	570	goto out;
	571	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	572	break;
	573	}
bbf45ba5 HB	574	default:
	575	r = -EINVAL;
	576	}
	577
	578	out:
	579	return r;
	580	}
	581
15711e9c AG	582	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	583	{
	584	u32 inst_lis = 0x3c000000;
	585	u32 inst_ori = 0x60000000;
	586	u32 inst_nop = 0x60000000;
	587	u32 inst_sc = 0x44000002;
	588	u32 inst_imm_mask = 0xffff;
	589
	590	/*
	591	* The hypercall to get into KVM from within guest context is as
	592	* follows:
	593	*
	594	* lis r0, r0, KVM_SC_MAGIC_R0@h
	595	* ori r0, KVM_SC_MAGIC_R0@l
	596	* sc
	597	* nop
	598	*/
	599	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	600	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	601	pvinfo->hcall[2] = inst_sc;
	602	pvinfo->hcall[3] = inst_nop;
	603
	604	return 0;
	605	}
	606
bbf45ba5 HB	607	long kvm_arch_vm_ioctl(struct file *filp,
	608	unsigned int ioctl, unsigned long arg)
	609	{
15711e9c	610	void __user argp = (void __user )arg;
bbf45ba5 HB	611	long r;
	612
	613	switch (ioctl) {
15711e9c AG	614	case KVM_PPC_GET_PVINFO: {
	615	struct kvm_ppc_pvinfo pvinfo;
	616	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	617	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	618	r = -EFAULT;
	619	goto out;
	620	}
	621
	622	break;
	623	}
bbf45ba5	624	default:
367e1319	625	r = -ENOTTY;
bbf45ba5 HB	626	}
bbf45ba5 HB	627
15711e9c	628	out:
bbf45ba5 HB	629	return r;
	630	}
	631
	632	int kvm_arch_init(void *opaque)
	633	{
	634	return 0;
	635	}
	636
	637	void kvm_arch_exit(void)
	638	{
	639	}