[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 <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:
	case KVM_CAP_PPC_HIOR:
	case KVM_CAP_PPC_PAPR:
#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;
		/* PPC970 requires an RMA */
		if (cpu_has_feature(CPU_FTR_ARCH_201))
			r = 2;
		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;
	case KVM_CAP_PPC_PAPR:
		r = 0;
		vcpu->arch.papr_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:
a15bd354	191	case KVM_CAP_PPC_HIOR:
930b412a	192	case KVM_CAP_PPC_PAPR:
5ce941ee	193	#endif
18978768	194	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	195	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	196	case KVM_CAP_ENABLE_CAP:
de56a948 PM	197	r = 1;
	198	break;
	199	#ifndef CONFIG_KVM_BOOK3S_64_HV
	200	case KVM_CAP_PPC_PAIRED_SINGLES:
ad0a048b	201	case KVM_CAP_PPC_OSI:
15711e9c	202	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	203	r = 1;
e15a1137 AG	204	break;
588968b6 LV	205	case KVM_CAP_COALESCED_MMIO:
	206	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	207	break;
54738c09 DG	208	#endif
	209	#ifdef CONFIG_KVM_BOOK3S_64_HV
	210	case KVM_CAP_SPAPR_TCE:
	211	r = 1;
	212	break;
371fefd6 PM	213	case KVM_CAP_PPC_SMT:
	214	r = threads_per_core;
	215	break;
aa04b4cc PM	216	case KVM_CAP_PPC_RMA:
aa04b4cc PM	217	r = 1;
9e368f29 PM	218	/* PPC970 requires an RMA */
	219	if (cpu_has_feature(CPU_FTR_ARCH_201))
	220	r = 2;
aa04b4cc	221	break;
de56a948	222	#endif
bbf45ba5 HB	223	default:
	224	r = 0;
	225	break;
	226	}
	227	return r;
	228
	229	}
	230
	231	long kvm_arch_dev_ioctl(struct file *filp,
	232	unsigned int ioctl, unsigned long arg)
	233	{
	234	return -EINVAL;
	235	}
	236
f7784b8e MT	237	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	238	struct kvm_memory_slot *memslot,
	239	struct kvm_memory_slot old,
	240	struct kvm_userspace_memory_region *mem,
	241	int user_alloc)
bbf45ba5	242	{
f9e0554d	243	return kvmppc_core_prepare_memory_region(kvm, mem);
bbf45ba5 HB	244	}
bbf45ba5 HB	245
f7784b8e MT	246	void kvm_arch_commit_memory_region(struct kvm *kvm,
	247	struct kvm_userspace_memory_region *mem,
	248	struct kvm_memory_slot old,
	249	int user_alloc)
	250	{
f9e0554d	251	kvmppc_core_commit_memory_region(kvm, mem);
f7784b8e MT	252	}
	253
	254
34d4cb8f MT	255	void kvm_arch_flush_shadow(struct kvm *kvm)
	256	{
	257	}
	258
bbf45ba5 HB	259	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	260	{
73e75b41 HB	261	struct kvm_vcpu *vcpu;
73e75b41 HB	262	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	263	if (!IS_ERR(vcpu))
06056bfb WY	264	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	265	return vcpu;
bbf45ba5 HB	266	}
	267
	268	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	269	{
a595405d AG	270	/* Make sure we're not using the vcpu anymore */
	271	hrtimer_cancel(&vcpu->arch.dec_timer);
	272	tasklet_kill(&vcpu->arch.tasklet);
	273
73e75b41	274	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	275	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	276	}
	277
	278	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	279	{
	280	kvm_arch_vcpu_free(vcpu);
	281	}
	282
	283	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	284	{
9dd921cf	285	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	286	}
	287
	288	static void kvmppc_decrementer_func(unsigned long data)
	289	{
	290	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	291
9dd921cf	292	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	293
	294	if (waitqueue_active(&vcpu->wq)) {
	295	wake_up_interruptible(&vcpu->wq);
	296	vcpu->stat.halt_wakeup++;
	297	}
bbf45ba5 HB	298	}
bbf45ba5 HB	299
544c6761 AG	300	/*
	301	* low level hrtimer wake routine. Because this runs in hardirq context
	302	* we schedule a tasklet to do the real work.
	303	*/
	304	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	305	{
	306	struct kvm_vcpu *vcpu;
	307
	308	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	309	tasklet_schedule(&vcpu->arch.tasklet);
	310
	311	return HRTIMER_NORESTART;
	312	}
	313
bbf45ba5 HB	314	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	315	{
544c6761 AG	316	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	317	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	318	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
de56a948	319	vcpu->arch.dec_expires = ~(u64)0;
bbf45ba5	320
09000adb BB	321	#ifdef CONFIG_KVM_EXIT_TIMING
	322	mutex_init(&vcpu->arch.exit_timing_lock);
	323	#endif
	324
bbf45ba5 HB	325	return 0;
	326	}
	327
	328	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	329	{
ecc0981f	330	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	331	}
	332
	333	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	334	{
eab17672 SW	335	#ifdef CONFIG_BOOKE
	336	/*
	337	* vrsave (formerly usprg0) isn't used by Linux, but may
	338	* be used by the guest.
	339	*
	340	* On non-booke this is associated with Altivec and
	341	* is handled by code in book3s.c.
	342	*/
	343	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	344	#endif
9dd921cf	345	kvmppc_core_vcpu_load(vcpu, cpu);
de56a948	346	vcpu->cpu = smp_processor_id();
bbf45ba5 HB	347	}
	348
	349	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	350	{
9dd921cf	351	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	352	#ifdef CONFIG_BOOKE
	353	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	354	#endif
de56a948	355	vcpu->cpu = -1;
bbf45ba5 HB	356	}
bbf45ba5 HB	357
d0bfb940	358	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	359	struct kvm_guest_debug *dbg)
bbf45ba5	360	{
f5d0906b	361	return -EINVAL;
bbf45ba5 HB	362	}
	363
	364	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	365	struct kvm_run *run)
	366	{
8e5b26b5	367	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	368	}
	369
	370	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	371	struct kvm_run *run)
	372	{
69b61833	373	u64 uninitialized_var(gpr);
bbf45ba5	374
8e5b26b5	375	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	376	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	377	return;
	378	}
	379
	380	if (vcpu->arch.mmio_is_bigendian) {
	381	switch (run->mmio.len) {
b104d066	382	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	383	case 4: gpr = (u32 )run->mmio.data; break;
	384	case 2: gpr = (u16 )run->mmio.data; break;
	385	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	386	}
	387	} else {
	388	/* Convert BE data from userland back to LE. */
	389	switch (run->mmio.len) {
8e5b26b5 AG	390	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	391	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	392	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	393	}
bbf45ba5 HB	394	}
8e5b26b5	395
3587d534 AG	396	if (vcpu->arch.mmio_sign_extend) {
	397	switch (run->mmio.len) {
	398	#ifdef CONFIG_PPC64
	399	case 4:
	400	gpr = (s64)(s32)gpr;
	401	break;
	402	#endif
	403	case 2:
	404	gpr = (s64)(s16)gpr;
	405	break;
	406	case 1:
	407	gpr = (s64)(s8)gpr;
	408	break;
	409	}
	410	}
	411
8e5b26b5	412	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	413
	414	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	415	case KVM_REG_GPR:
	416	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	417	break;
	418	case KVM_REG_FPR:
	419	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	420	break;
287d5611	421	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	422	case KVM_REG_QPR:
	423	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	424	break;
	425	case KVM_REG_FQPR:
	426	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	427	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	428	break;
287d5611	429	#endif
b104d066 AG	430	default:
	431	BUG();
	432	}
bbf45ba5 HB	433	}
	434
	435	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	436	unsigned int rt, unsigned int bytes, int is_bigendian)
	437	{
	438	if (bytes > sizeof(run->mmio.data)) {
	439	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	440	run->mmio.len);
	441	}
	442
	443	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	444	run->mmio.len = bytes;
	445	run->mmio.is_write = 0;
	446
	447	vcpu->arch.io_gpr = rt;
	448	vcpu->arch.mmio_is_bigendian = is_bigendian;
	449	vcpu->mmio_needed = 1;
	450	vcpu->mmio_is_write = 0;
3587d534	451	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	452
	453	return EMULATE_DO_MMIO;
	454	}
	455
3587d534 AG	456	/* Same as above, but sign extends */
	457	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	458	unsigned int rt, unsigned int bytes, int is_bigendian)
	459	{
	460	int r;
	461
	462	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	463	vcpu->arch.mmio_sign_extend = 1;
	464
	465	return r;
	466	}
	467
bbf45ba5	468	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	469	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	470	{
	471	void *data = run->mmio.data;
	472
	473	if (bytes > sizeof(run->mmio.data)) {
	474	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	475	run->mmio.len);
	476	}
	477
	478	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	479	run->mmio.len = bytes;
	480	run->mmio.is_write = 1;
	481	vcpu->mmio_needed = 1;
	482	vcpu->mmio_is_write = 1;
	483
	484	/* Store the value at the lowest bytes in 'data'. */
	485	if (is_bigendian) {
	486	switch (bytes) {
b104d066	487	case 8: (u64 )data = val; break;
bbf45ba5 HB	488	case 4: (u32 )data = val; break;
	489	case 2: (u16 )data = val; break;
	490	case 1: (u8 )data = val; break;
	491	}
	492	} else {
	493	/* Store LE value into 'data'. */
	494	switch (bytes) {
	495	case 4: st_le32(data, val); break;
	496	case 2: st_le16(data, val); break;
	497	case 1: (u8 )data = val; break;
	498	}
	499	}
	500
	501	return EMULATE_DO_MMIO;
	502	}
	503
	504	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	505	{
	506	int r;
	507	sigset_t sigsaved;
	508
	509	if (vcpu->sigset_active)
	510	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	511
	512	if (vcpu->mmio_needed) {
	513	if (!vcpu->mmio_is_write)
	514	kvmppc_complete_mmio_load(vcpu, run);
	515	vcpu->mmio_needed = 0;
	516	} else if (vcpu->arch.dcr_needed) {
	517	if (!vcpu->arch.dcr_is_write)
	518	kvmppc_complete_dcr_load(vcpu, run);
	519	vcpu->arch.dcr_needed = 0;
ad0a048b AG	520	} else if (vcpu->arch.osi_needed) {
	521	u64 *gprs = run->osi.gprs;
	522	int i;
	523
	524	for (i = 0; i < 32; i++)
	525	kvmppc_set_gpr(vcpu, i, gprs[i]);
	526	vcpu->arch.osi_needed = 0;
de56a948 PM	527	} else if (vcpu->arch.hcall_needed) {
	528	int i;
	529
	530	kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
	531	for (i = 0; i < 9; ++i)
	532	kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
	533	vcpu->arch.hcall_needed = 0;
bbf45ba5 HB	534	}
bbf45ba5 HB	535
9dd921cf	536	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	537
df6909e5	538	r = kvmppc_vcpu_run(run, vcpu);
bbf45ba5 HB	539
	540	if (vcpu->sigset_active)
	541	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	542
	543	return r;
	544	}
	545
	546	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	547	{
18978768 AG	548	if (irq->irq == KVM_INTERRUPT_UNSET)
	549	kvmppc_core_dequeue_external(vcpu, irq);
	550	else
	551	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	552
	553	if (waitqueue_active(&vcpu->wq)) {
	554	wake_up_interruptible(&vcpu->wq);
	555	vcpu->stat.halt_wakeup++;
de56a948 PM	556	} else if (vcpu->cpu != -1) {
de56a948 PM	557	smp_send_reschedule(vcpu->cpu);
45c5eb67 HB	558	}
45c5eb67 HB	559
bbf45ba5 HB	560	return 0;
	561	}
	562
71fbfd5f AG	563	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	564	struct kvm_enable_cap *cap)
	565	{
	566	int r;
	567
	568	if (cap->flags)
	569	return -EINVAL;
	570
	571	switch (cap->cap) {
ad0a048b AG	572	case KVM_CAP_PPC_OSI:
	573	r = 0;
	574	vcpu->arch.osi_enabled = true;
	575	break;
930b412a AG	576	case KVM_CAP_PPC_PAPR:
	577	r = 0;
	578	vcpu->arch.papr_enabled = true;
	579	break;
71fbfd5f AG	580	default:
	581	r = -EINVAL;
	582	break;
	583	}
	584
	585	return r;
	586	}
	587
bbf45ba5 HB	588	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	589	struct kvm_mp_state *mp_state)
	590	{
	591	return -EINVAL;
	592	}
	593
	594	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	595	struct kvm_mp_state *mp_state)
	596	{
	597	return -EINVAL;
	598	}
	599
	600	long kvm_arch_vcpu_ioctl(struct file *filp,
	601	unsigned int ioctl, unsigned long arg)
	602	{
	603	struct kvm_vcpu *vcpu = filp->private_data;
	604	void __user argp = (void __user )arg;
	605	long r;
	606
93736624 AK	607	switch (ioctl) {
93736624 AK	608	case KVM_INTERRUPT: {
bbf45ba5 HB	609	struct kvm_interrupt irq;
	610	r = -EFAULT;
	611	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	612	goto out;
bbf45ba5	613	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	614	goto out;
bbf45ba5	615	}
19483d14	616
71fbfd5f AG	617	case KVM_ENABLE_CAP:
	618	{
	619	struct kvm_enable_cap cap;
	620	r = -EFAULT;
	621	if (copy_from_user(&cap, argp, sizeof(cap)))
	622	goto out;
	623	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	624	break;
	625	}
bbf45ba5 HB	626	default:
	627	r = -EINVAL;
	628	}
	629
	630	out:
	631	return r;
	632	}
	633
15711e9c AG	634	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	635	{
	636	u32 inst_lis = 0x3c000000;
	637	u32 inst_ori = 0x60000000;
	638	u32 inst_nop = 0x60000000;
	639	u32 inst_sc = 0x44000002;
	640	u32 inst_imm_mask = 0xffff;
	641
	642	/*
	643	* The hypercall to get into KVM from within guest context is as
	644	* follows:
	645	*
	646	* lis r0, r0, KVM_SC_MAGIC_R0@h
	647	* ori r0, KVM_SC_MAGIC_R0@l
	648	* sc
	649	* nop
	650	*/
	651	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	652	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	653	pvinfo->hcall[2] = inst_sc;
	654	pvinfo->hcall[3] = inst_nop;
	655
	656	return 0;
	657	}
	658
bbf45ba5 HB	659	long kvm_arch_vm_ioctl(struct file *filp,
	660	unsigned int ioctl, unsigned long arg)
	661	{
15711e9c	662	void __user argp = (void __user )arg;
bbf45ba5 HB	663	long r;
	664
	665	switch (ioctl) {
15711e9c AG	666	case KVM_PPC_GET_PVINFO: {
15711e9c AG	667	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	668	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	669	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	670	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	671	r = -EFAULT;
	672	goto out;
	673	}
	674
	675	break;
	676	}
54738c09 DG	677	#ifdef CONFIG_KVM_BOOK3S_64_HV
	678	case KVM_CREATE_SPAPR_TCE: {
	679	struct kvm_create_spapr_tce create_tce;
	680	struct kvm *kvm = filp->private_data;
	681
	682	r = -EFAULT;
	683	if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
	684	goto out;
	685	r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
	686	goto out;
	687	}
aa04b4cc PM	688
	689	case KVM_ALLOCATE_RMA: {
	690	struct kvm *kvm = filp->private_data;
	691	struct kvm_allocate_rma rma;
	692
	693	r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
	694	if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
	695	r = -EFAULT;
	696	break;
	697	}
54738c09 DG	698	#endif /* CONFIG_KVM_BOOK3S_64_HV */
54738c09 DG	699
bbf45ba5	700	default:
367e1319	701	r = -ENOTTY;
bbf45ba5 HB	702	}
bbf45ba5 HB	703
15711e9c	704	out:
bbf45ba5 HB	705	return r;
	706	}
	707
	708	int kvm_arch_init(void *opaque)
	709	{
	710	return 0;
	711	}
	712
	713	void kvm_arch_exit(void)
	714	{
	715	}