[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 <asm/cputhreads.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)
{
#ifndef CONFIG_KVM_BOOK3S_64_HV
	return !(v->arch.shared->msr & MSR_WE) ||
	       !!(v->arch.pending_exceptions);
#else
	return !(v->arch.ceded) || !!(v->arch.pending_exceptions);
#endif
}

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;

		r2 = KVM_MAGIC_FEAT_SR;

		r = HC_EV_SUCCESS;
		break;
	}
	case HC_VENDOR_KVM | KVM_HC_FEATURES:
		r = HC_EV_SUCCESS;
#if defined(CONFIG_PPC_BOOK3S) || defined(CONFIG_KVM_E500)
		/* XXX Missing magic page on 44x */
		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif

		/* Second return value is in r4 */
		break;
	default:
		r = HC_EV_UNIMPLEMENTED;
		break;
	}

	kvmppc_set_gpr(vcpu, 4, r2);

	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();
}

int kvm_arch_init_vm(struct kvm *kvm)
{
	return kvmppc_core_init_vm(kvm);
}

void kvm_arch_destroy_vm(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);

	kvmppc_core_destroy_vm(kvm);

	mutex_unlock(&kvm->lock);
}

void kvm_arch_sync_events(struct kvm *kvm)
{
}

int kvm_dev_ioctl_check_extension(long ext)
{
	int r;

	switch (ext) {
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_SREGS:
#else
	case KVM_CAP_PPC_SEGSTATE:
#endif
	case KVM_CAP_PPC_UNSET_IRQ:
	case KVM_CAP_PPC_IRQ_LEVEL:
	case KVM_CAP_ENABLE_CAP:
		r = 1;
		break;
#ifndef CONFIG_KVM_BOOK3S_64_HV
	case KVM_CAP_PPC_PAIRED_SINGLES:
	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;
#endif
#ifdef CONFIG_KVM_BOOK3S_64_HV
	case KVM_CAP_SPAPR_TCE:
		r = 1;
		break;
	case KVM_CAP_PPC_SMT:
		r = threads_per_core;
		break;
	case KVM_CAP_PPC_RMA:
		r = 1;
		break;
#endif
	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 kvmppc_core_prepare_memory_region(kvm, mem);
}

void kvm_arch_commit_memory_region(struct kvm *kvm,
               struct kvm_userspace_memory_region *mem,
               struct kvm_memory_slot old,
               int user_alloc)
{
	kvmppc_core_commit_memory_region(kvm, mem);
}


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;
	vcpu->arch.dec_expires = ~(u64)0;

#ifdef CONFIG_KVM_EXIT_TIMING
	mutex_init(&vcpu->arch.exit_timing_lock);
#endif

	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)
{
#ifdef CONFIG_BOOKE
	/*
	 * vrsave (formerly usprg0) isn't used by Linux, but may
	 * be used by the guest.
	 *
	 * On non-booke this is associated with Altivec and
	 * is handled by code in book3s.c.
	 */
	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
#endif
	kvmppc_core_vcpu_load(vcpu, cpu);
	vcpu->cpu = smp_processor_id();
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
	kvmppc_core_vcpu_put(vcpu);
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
	vcpu->cpu = -1;
}

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;
	} else if (vcpu->arch.hcall_needed) {
		int i;

		kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
		for (i = 0; i < 9; ++i)
			kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
		vcpu->arch.hcall_needed = 0;
	}

	kvmppc_core_deliver_interrupts(vcpu);

	r = kvmppc_vcpu_run(run, vcpu);

	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++;
	} else if (vcpu->cpu != -1) {
		smp_send_reschedule(vcpu->cpu);
	}

	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;
		memset(&pvinfo, 0, sizeof(pvinfo));
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
#ifdef CONFIG_KVM_BOOK3S_64_HV
	case KVM_CREATE_SPAPR_TCE: {
		struct kvm_create_spapr_tce create_tce;
		struct kvm *kvm = filp->private_data;

		r = -EFAULT;
		if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
			goto out;
		r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
		goto out;
	}

	case KVM_ALLOCATE_RMA: {
		struct kvm *kvm = filp->private_data;
		struct kvm_allocate_rma rma;

		r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
		if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
			r = -EFAULT;
		break;
	}
#endif /* CONFIG_KVM_BOOK3S_64_HV */

	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>
371fefd6	33	#include <asm/cputhreads.h>
73e75b41	34	#include "timing.h"
fad7b9b5	35	#include "../mm/mmu_decl.h"
bbf45ba5	36
46f43c6e MT	37	#define CREATE_TRACE_POINTS
	38	#include "trace.h"
	39
bbf45ba5 HB	40	int kvm_arch_vcpu_runnable(struct kvm_vcpu *v)
bbf45ba5 HB	41	{
de56a948	42	#ifndef CONFIG_KVM_BOOK3S_64_HV
666e7252 AG	43	return !(v->arch.shared->msr & MSR_WE) \|\|
666e7252 AG	44	!!(v->arch.pending_exceptions);
de56a948	45	#else
a8606e20	46	return !(v->arch.ceded) \|\| !!(v->arch.pending_exceptions);
de56a948	47	#endif
bbf45ba5 HB	48	}
bbf45ba5 HB	49
2a342ed5 AG	50	int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
	51	{
	52	int nr = kvmppc_get_gpr(vcpu, 11);
	53	int r;
	54	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	55	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	56	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	57	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	58	unsigned long r2 = 0;
	59
	60	if (!(vcpu->arch.shared->msr & MSR_SF)) {
	61	/* 32 bit mode */
	62	param1 &= 0xffffffff;
	63	param2 &= 0xffffffff;
	64	param3 &= 0xffffffff;
	65	param4 &= 0xffffffff;
	66	}
	67
	68	switch (nr) {
5fc87407 AG	69	case HC_VENDOR_KVM \| KVM_HC_PPC_MAP_MAGIC_PAGE:
	70	{
	71	vcpu->arch.magic_page_pa = param1;
	72	vcpu->arch.magic_page_ea = param2;
	73
df1bfa25	74	r2 = KVM_MAGIC_FEAT_SR;
7508e16c	75
5fc87407 AG	76	r = HC_EV_SUCCESS;
	77	break;
	78	}
2a342ed5 AG	79	case HC_VENDOR_KVM \| KVM_HC_FEATURES:
2a342ed5 AG	80	r = HC_EV_SUCCESS;
a4cd8b23 SW	81	#if defined(CONFIG_PPC_BOOK3S) \|\| defined(CONFIG_KVM_E500)
a4cd8b23 SW	82	/* XXX Missing magic page on 44x */
5fc87407 AG	83	r2 \|= (1 << KVM_FEATURE_MAGIC_PAGE);
5fc87407 AG	84	#endif
2a342ed5 AG	85
2a342ed5 AG	86	/* Second return value is in r4 */
2a342ed5 AG	87	break;
	88	default:
	89	r = HC_EV_UNIMPLEMENTED;
	90	break;
	91	}
	92
7508e16c AG	93	kvmppc_set_gpr(vcpu, 4, r2);
7508e16c AG	94
2a342ed5 AG	95	return r;
2a342ed5 AG	96	}
bbf45ba5 HB	97
	98	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	99	{
	100	enum emulation_result er;
	101	int r;
	102
	103	er = kvmppc_emulate_instruction(run, vcpu);
	104	switch (er) {
	105	case EMULATE_DONE:
	106	/* Future optimization: only reload non-volatiles if they were
	107	* actually modified. */
	108	r = RESUME_GUEST_NV;
	109	break;
	110	case EMULATE_DO_MMIO:
	111	run->exit_reason = KVM_EXIT_MMIO;
	112	/* We must reload nonvolatiles because "update" load/store
	113	* instructions modify register state. */
	114	/* Future optimization: only reload non-volatiles if they were
	115	* actually modified. */
	116	r = RESUME_HOST_NV;
	117	break;
	118	case EMULATE_FAIL:
	119	/* XXX Deliver Program interrupt to guest. */
	120	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	121	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	122	r = RESUME_HOST;
	123	break;
	124	default:
	125	BUG();
	126	}
	127
	128	return r;
	129	}
	130
10474ae8	131	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	132	{
10474ae8	133	return 0;
bbf45ba5 HB	134	}
	135
	136	void kvm_arch_hardware_disable(void *garbage)
	137	{
	138	}
	139
	140	int kvm_arch_hardware_setup(void)
	141	{
	142	return 0;
	143	}
	144
	145	void kvm_arch_hardware_unsetup(void)
	146	{
	147	}
	148
	149	void kvm_arch_check_processor_compat(void *rtn)
	150	{
9dd921cf	151	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	152	}
bbf45ba5 HB	153
d89f5eff	154	int kvm_arch_init_vm(struct kvm *kvm)
bbf45ba5	155	{
f9e0554d	156	return kvmppc_core_init_vm(kvm);
bbf45ba5 HB	157	}
bbf45ba5 HB	158
d89f5eff	159	void kvm_arch_destroy_vm(struct kvm *kvm)
bbf45ba5 HB	160	{
bbf45ba5 HB	161	unsigned int i;
988a2cae	162	struct kvm_vcpu *vcpu;
bbf45ba5	163
988a2cae GN	164	kvm_for_each_vcpu(i, vcpu, kvm)
	165	kvm_arch_vcpu_free(vcpu);
	166
	167	mutex_lock(&kvm->lock);
	168	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	169	kvm->vcpus[i] = NULL;
	170
	171	atomic_set(&kvm->online_vcpus, 0);
f9e0554d PM	172
	173	kvmppc_core_destroy_vm(kvm);
	174
988a2cae	175	mutex_unlock(&kvm->lock);
bbf45ba5 HB	176	}
bbf45ba5 HB	177
ad8ba2cd SY	178	void kvm_arch_sync_events(struct kvm *kvm)
	179	{
	180	}
	181
bbf45ba5 HB	182	int kvm_dev_ioctl_check_extension(long ext)
	183	{
	184	int r;
	185
	186	switch (ext) {
5ce941ee SW	187	#ifdef CONFIG_BOOKE
	188	case KVM_CAP_PPC_BOOKE_SREGS:
	189	#else
e15a1137	190	case KVM_CAP_PPC_SEGSTATE:
5ce941ee	191	#endif
18978768	192	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	193	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	194	case KVM_CAP_ENABLE_CAP:
de56a948 PM	195	r = 1;
	196	break;
	197	#ifndef CONFIG_KVM_BOOK3S_64_HV
	198	case KVM_CAP_PPC_PAIRED_SINGLES:
ad0a048b	199	case KVM_CAP_PPC_OSI:
15711e9c	200	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	201	r = 1;
e15a1137 AG	202	break;
588968b6 LV	203	case KVM_CAP_COALESCED_MMIO:
	204	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	205	break;
54738c09 DG	206	#endif
	207	#ifdef CONFIG_KVM_BOOK3S_64_HV
	208	case KVM_CAP_SPAPR_TCE:
	209	r = 1;
	210	break;
371fefd6 PM	211	case KVM_CAP_PPC_SMT:
	212	r = threads_per_core;
	213	break;
aa04b4cc PM	214	case KVM_CAP_PPC_RMA:
	215	r = 1;
	216	break;
de56a948	217	#endif
bbf45ba5 HB	218	default:
	219	r = 0;
	220	break;
	221	}
	222	return r;
	223
	224	}
	225
	226	long kvm_arch_dev_ioctl(struct file *filp,
	227	unsigned int ioctl, unsigned long arg)
	228	{
	229	return -EINVAL;
	230	}
	231
f7784b8e MT	232	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	233	struct kvm_memory_slot *memslot,
	234	struct kvm_memory_slot old,
	235	struct kvm_userspace_memory_region *mem,
	236	int user_alloc)
bbf45ba5	237	{
f9e0554d	238	return kvmppc_core_prepare_memory_region(kvm, mem);
bbf45ba5 HB	239	}
bbf45ba5 HB	240
f7784b8e MT	241	void kvm_arch_commit_memory_region(struct kvm *kvm,
	242	struct kvm_userspace_memory_region *mem,
	243	struct kvm_memory_slot old,
	244	int user_alloc)
	245	{
f9e0554d	246	kvmppc_core_commit_memory_region(kvm, mem);
f7784b8e MT	247	}
	248
	249
34d4cb8f MT	250	void kvm_arch_flush_shadow(struct kvm *kvm)
	251	{
	252	}
	253
bbf45ba5 HB	254	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	255	{
73e75b41 HB	256	struct kvm_vcpu *vcpu;
73e75b41 HB	257	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	258	if (!IS_ERR(vcpu))
06056bfb WY	259	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	260	return vcpu;
bbf45ba5 HB	261	}
	262
	263	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	264	{
a595405d AG	265	/* Make sure we're not using the vcpu anymore */
	266	hrtimer_cancel(&vcpu->arch.dec_timer);
	267	tasklet_kill(&vcpu->arch.tasklet);
	268
73e75b41	269	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	270	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	271	}
	272
	273	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	274	{
	275	kvm_arch_vcpu_free(vcpu);
	276	}
	277
	278	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	279	{
9dd921cf	280	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	281	}
	282
	283	static void kvmppc_decrementer_func(unsigned long data)
	284	{
	285	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	286
9dd921cf	287	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	288
	289	if (waitqueue_active(&vcpu->wq)) {
	290	wake_up_interruptible(&vcpu->wq);
	291	vcpu->stat.halt_wakeup++;
	292	}
bbf45ba5 HB	293	}
bbf45ba5 HB	294
544c6761 AG	295	/*
	296	* low level hrtimer wake routine. Because this runs in hardirq context
	297	* we schedule a tasklet to do the real work.
	298	*/
	299	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	300	{
	301	struct kvm_vcpu *vcpu;
	302
	303	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	304	tasklet_schedule(&vcpu->arch.tasklet);
	305
	306	return HRTIMER_NORESTART;
	307	}
	308
bbf45ba5 HB	309	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	310	{
544c6761 AG	311	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	312	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	313	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
de56a948	314	vcpu->arch.dec_expires = ~(u64)0;
bbf45ba5	315
09000adb BB	316	#ifdef CONFIG_KVM_EXIT_TIMING
	317	mutex_init(&vcpu->arch.exit_timing_lock);
	318	#endif
	319
bbf45ba5 HB	320	return 0;
	321	}
	322
	323	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	324	{
ecc0981f	325	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	326	}
	327
	328	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	329	{
eab17672 SW	330	#ifdef CONFIG_BOOKE
	331	/*
	332	* vrsave (formerly usprg0) isn't used by Linux, but may
	333	* be used by the guest.
	334	*
	335	* On non-booke this is associated with Altivec and
	336	* is handled by code in book3s.c.
	337	*/
	338	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	339	#endif
9dd921cf	340	kvmppc_core_vcpu_load(vcpu, cpu);
de56a948	341	vcpu->cpu = smp_processor_id();
bbf45ba5 HB	342	}
	343
	344	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	345	{
9dd921cf	346	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	347	#ifdef CONFIG_BOOKE
	348	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	349	#endif
de56a948	350	vcpu->cpu = -1;
bbf45ba5 HB	351	}
bbf45ba5 HB	352
d0bfb940	353	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	354	struct kvm_guest_debug *dbg)
bbf45ba5	355	{
f5d0906b	356	return -EINVAL;
bbf45ba5 HB	357	}
	358
	359	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	360	struct kvm_run *run)
	361	{
8e5b26b5	362	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	363	}
	364
	365	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	366	struct kvm_run *run)
	367	{
69b61833	368	u64 uninitialized_var(gpr);
bbf45ba5	369
8e5b26b5	370	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	371	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	372	return;
	373	}
	374
	375	if (vcpu->arch.mmio_is_bigendian) {
	376	switch (run->mmio.len) {
b104d066	377	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	378	case 4: gpr = (u32 )run->mmio.data; break;
	379	case 2: gpr = (u16 )run->mmio.data; break;
	380	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	381	}
	382	} else {
	383	/* Convert BE data from userland back to LE. */
	384	switch (run->mmio.len) {
8e5b26b5 AG	385	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	386	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	387	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	388	}
bbf45ba5 HB	389	}
8e5b26b5	390
3587d534 AG	391	if (vcpu->arch.mmio_sign_extend) {
	392	switch (run->mmio.len) {
	393	#ifdef CONFIG_PPC64
	394	case 4:
	395	gpr = (s64)(s32)gpr;
	396	break;
	397	#endif
	398	case 2:
	399	gpr = (s64)(s16)gpr;
	400	break;
	401	case 1:
	402	gpr = (s64)(s8)gpr;
	403	break;
	404	}
	405	}
	406
8e5b26b5	407	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	408
	409	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	410	case KVM_REG_GPR:
	411	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	412	break;
	413	case KVM_REG_FPR:
	414	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	415	break;
287d5611	416	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	417	case KVM_REG_QPR:
	418	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	419	break;
	420	case KVM_REG_FQPR:
	421	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	422	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	423	break;
287d5611	424	#endif
b104d066 AG	425	default:
	426	BUG();
	427	}
bbf45ba5 HB	428	}
	429
	430	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	431	unsigned int rt, unsigned int bytes, int is_bigendian)
	432	{
	433	if (bytes > sizeof(run->mmio.data)) {
	434	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	435	run->mmio.len);
	436	}
	437
	438	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	439	run->mmio.len = bytes;
	440	run->mmio.is_write = 0;
	441
	442	vcpu->arch.io_gpr = rt;
	443	vcpu->arch.mmio_is_bigendian = is_bigendian;
	444	vcpu->mmio_needed = 1;
	445	vcpu->mmio_is_write = 0;
3587d534	446	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	447
	448	return EMULATE_DO_MMIO;
	449	}
	450
3587d534 AG	451	/* Same as above, but sign extends */
	452	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	453	unsigned int rt, unsigned int bytes, int is_bigendian)
	454	{
	455	int r;
	456
	457	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	458	vcpu->arch.mmio_sign_extend = 1;
	459
	460	return r;
	461	}
	462
bbf45ba5	463	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	464	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	465	{
	466	void *data = run->mmio.data;
	467
	468	if (bytes > sizeof(run->mmio.data)) {
	469	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	470	run->mmio.len);
	471	}
	472
	473	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	474	run->mmio.len = bytes;
	475	run->mmio.is_write = 1;
	476	vcpu->mmio_needed = 1;
	477	vcpu->mmio_is_write = 1;
	478
	479	/* Store the value at the lowest bytes in 'data'. */
	480	if (is_bigendian) {
	481	switch (bytes) {
b104d066	482	case 8: (u64 )data = val; break;
bbf45ba5 HB	483	case 4: (u32 )data = val; break;
	484	case 2: (u16 )data = val; break;
	485	case 1: (u8 )data = val; break;
	486	}
	487	} else {
	488	/* Store LE value into 'data'. */
	489	switch (bytes) {
	490	case 4: st_le32(data, val); break;
	491	case 2: st_le16(data, val); break;
	492	case 1: (u8 )data = val; break;
	493	}
	494	}
	495
	496	return EMULATE_DO_MMIO;
	497	}
	498
	499	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	500	{
	501	int r;
	502	sigset_t sigsaved;
	503
	504	if (vcpu->sigset_active)
	505	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	506
	507	if (vcpu->mmio_needed) {
	508	if (!vcpu->mmio_is_write)
	509	kvmppc_complete_mmio_load(vcpu, run);
	510	vcpu->mmio_needed = 0;
	511	} else if (vcpu->arch.dcr_needed) {
	512	if (!vcpu->arch.dcr_is_write)
	513	kvmppc_complete_dcr_load(vcpu, run);
	514	vcpu->arch.dcr_needed = 0;
ad0a048b AG	515	} else if (vcpu->arch.osi_needed) {
	516	u64 *gprs = run->osi.gprs;
	517	int i;
	518
	519	for (i = 0; i < 32; i++)
	520	kvmppc_set_gpr(vcpu, i, gprs[i]);
	521	vcpu->arch.osi_needed = 0;
de56a948 PM	522	} else if (vcpu->arch.hcall_needed) {
	523	int i;
	524
	525	kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
	526	for (i = 0; i < 9; ++i)
	527	kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
	528	vcpu->arch.hcall_needed = 0;
bbf45ba5 HB	529	}
bbf45ba5 HB	530
9dd921cf	531	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	532
df6909e5	533	r = kvmppc_vcpu_run(run, vcpu);
bbf45ba5 HB	534
	535	if (vcpu->sigset_active)
	536	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	537
	538	return r;
	539	}
	540
	541	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	542	{
18978768 AG	543	if (irq->irq == KVM_INTERRUPT_UNSET)
	544	kvmppc_core_dequeue_external(vcpu, irq);
	545	else
	546	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	547
	548	if (waitqueue_active(&vcpu->wq)) {
	549	wake_up_interruptible(&vcpu->wq);
	550	vcpu->stat.halt_wakeup++;
de56a948 PM	551	} else if (vcpu->cpu != -1) {
de56a948 PM	552	smp_send_reschedule(vcpu->cpu);
45c5eb67 HB	553	}
45c5eb67 HB	554
bbf45ba5 HB	555	return 0;
	556	}
	557
71fbfd5f AG	558	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	559	struct kvm_enable_cap *cap)
	560	{
	561	int r;
	562
	563	if (cap->flags)
	564	return -EINVAL;
	565
	566	switch (cap->cap) {
ad0a048b AG	567	case KVM_CAP_PPC_OSI:
	568	r = 0;
	569	vcpu->arch.osi_enabled = true;
	570	break;
71fbfd5f AG	571	default:
	572	r = -EINVAL;
	573	break;
	574	}
	575
	576	return r;
	577	}
	578
bbf45ba5 HB	579	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	580	struct kvm_mp_state *mp_state)
	581	{
	582	return -EINVAL;
	583	}
	584
	585	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	586	struct kvm_mp_state *mp_state)
	587	{
	588	return -EINVAL;
	589	}
	590
	591	long kvm_arch_vcpu_ioctl(struct file *filp,
	592	unsigned int ioctl, unsigned long arg)
	593	{
	594	struct kvm_vcpu *vcpu = filp->private_data;
	595	void __user argp = (void __user )arg;
	596	long r;
	597
93736624 AK	598	switch (ioctl) {
93736624 AK	599	case KVM_INTERRUPT: {
bbf45ba5 HB	600	struct kvm_interrupt irq;
	601	r = -EFAULT;
	602	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	603	goto out;
bbf45ba5	604	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	605	goto out;
bbf45ba5	606	}
19483d14	607
71fbfd5f AG	608	case KVM_ENABLE_CAP:
	609	{
	610	struct kvm_enable_cap cap;
	611	r = -EFAULT;
	612	if (copy_from_user(&cap, argp, sizeof(cap)))
	613	goto out;
	614	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	615	break;
	616	}
bbf45ba5 HB	617	default:
	618	r = -EINVAL;
	619	}
	620
	621	out:
	622	return r;
	623	}
	624
15711e9c AG	625	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	626	{
	627	u32 inst_lis = 0x3c000000;
	628	u32 inst_ori = 0x60000000;
	629	u32 inst_nop = 0x60000000;
	630	u32 inst_sc = 0x44000002;
	631	u32 inst_imm_mask = 0xffff;
	632
	633	/*
	634	* The hypercall to get into KVM from within guest context is as
	635	* follows:
	636	*
	637	* lis r0, r0, KVM_SC_MAGIC_R0@h
	638	* ori r0, KVM_SC_MAGIC_R0@l
	639	* sc
	640	* nop
	641	*/
	642	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	643	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	644	pvinfo->hcall[2] = inst_sc;
	645	pvinfo->hcall[3] = inst_nop;
	646
	647	return 0;
	648	}
	649
bbf45ba5 HB	650	long kvm_arch_vm_ioctl(struct file *filp,
	651	unsigned int ioctl, unsigned long arg)
	652	{
15711e9c	653	void __user argp = (void __user )arg;
bbf45ba5 HB	654	long r;
	655
	656	switch (ioctl) {
15711e9c AG	657	case KVM_PPC_GET_PVINFO: {
15711e9c AG	658	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	659	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	660	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	661	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	662	r = -EFAULT;
	663	goto out;
	664	}
	665
	666	break;
	667	}
54738c09 DG	668	#ifdef CONFIG_KVM_BOOK3S_64_HV
	669	case KVM_CREATE_SPAPR_TCE: {
	670	struct kvm_create_spapr_tce create_tce;
	671	struct kvm *kvm = filp->private_data;
	672
	673	r = -EFAULT;
	674	if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
	675	goto out;
	676	r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
	677	goto out;
	678	}
aa04b4cc PM	679
	680	case KVM_ALLOCATE_RMA: {
	681	struct kvm *kvm = filp->private_data;
	682	struct kvm_allocate_rma rma;
	683
	684	r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
	685	if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
	686	r = -EFAULT;
	687	break;
	688	}
54738c09 DG	689	#endif /* CONFIG_KVM_BOOK3S_64_HV */
54738c09 DG	690
bbf45ba5	691	default:
367e1319	692	r = -ENOTTY;
bbf45ba5 HB	693	}
bbf45ba5 HB	694
15711e9c	695	out:
bbf45ba5 HB	696	return r;
	697	}
	698
	699	int kvm_arch_init(void *opaque)
	700	{
	701	return 0;
	702	}
	703
	704	void kvm_arch_exit(void)
	705	{
	706	}