[mirror_ubuntu-bionic-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/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)
{
	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;

		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_sanity_check(struct kvm_vcpu *vcpu)
{
	int r = false;

	/* We have to know what CPU to virtualize */
	if (!vcpu->arch.pvr)
		goto out;

	/* PAPR only works with book3s_64 */
	if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
		goto out;

#ifdef CONFIG_KVM_BOOK3S_64_HV
	/* HV KVM can only do PAPR mode for now */
	if (!vcpu->arch.papr_enabled)
		goto out;
#endif

	r = true;

out:
	vcpu->arch.sane = r;
	return r ? 0 : -EINVAL;
}

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, unsigned long type)
{
	if (type)
		return -EINVAL;

	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_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);
	vcpu->arch.wqp = &vcpu->wq;
	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->arch.wqp)) {
		wake_up_interruptible(vcpu->arch.wqp);
		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);
		return 0;
	}

	kvmppc_core_queue_external(vcpu, irq);

	if (waitqueue_active(vcpu->arch.wqp)) {
		wake_up_interruptible(vcpu->arch.wqp);
		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;
	}

	if (!r)
		r = kvmppc_sanity_check(vcpu);

	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;
}

int kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
{
	return VM_FAULT_SIGBUS;
}

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>
bbf45ba5	24	#include <linux/vmalloc.h>
544c6761	25	#include <linux/hrtimer.h>
bbf45ba5	26	#include <linux/fs.h>
5a0e3ad6	27	#include <linux/slab.h>
bbf45ba5 HB	28	#include <asm/cputable.h>
	29	#include <asm/uaccess.h>
	30	#include <asm/kvm_ppc.h>
83aae4a8	31	#include <asm/tlbflush.h>
371fefd6	32	#include <asm/cputhreads.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
df1bfa25	69	r2 = KVM_MAGIC_FEAT_SR;
7508e16c	70
5fc87407 AG	71	r = HC_EV_SUCCESS;
	72	break;
	73	}
2a342ed5 AG	74	case HC_VENDOR_KVM \| KVM_HC_FEATURES:
2a342ed5 AG	75	r = HC_EV_SUCCESS;
a4cd8b23 SW	76	#if defined(CONFIG_PPC_BOOK3S) \|\| defined(CONFIG_KVM_E500)
a4cd8b23 SW	77	/* XXX Missing magic page on 44x */
5fc87407 AG	78	r2 \|= (1 << KVM_FEATURE_MAGIC_PAGE);
5fc87407 AG	79	#endif
2a342ed5 AG	80
2a342ed5 AG	81	/* Second return value is in r4 */
2a342ed5 AG	82	break;
	83	default:
	84	r = HC_EV_UNIMPLEMENTED;
	85	break;
	86	}
	87
7508e16c AG	88	kvmppc_set_gpr(vcpu, 4, r2);
7508e16c AG	89
2a342ed5 AG	90	return r;
2a342ed5 AG	91	}
bbf45ba5	92
af8f38b3 AG	93	int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
	94	{
	95	int r = false;
	96
	97	/* We have to know what CPU to virtualize */
	98	if (!vcpu->arch.pvr)
	99	goto out;
	100
	101	/* PAPR only works with book3s_64 */
	102	if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
	103	goto out;
	104
	105	#ifdef CONFIG_KVM_BOOK3S_64_HV
	106	/* HV KVM can only do PAPR mode for now */
	107	if (!vcpu->arch.papr_enabled)
	108	goto out;
	109	#endif
	110
	111	r = true;
	112
	113	out:
	114	vcpu->arch.sane = r;
	115	return r ? 0 : -EINVAL;
	116	}
	117
bbf45ba5 HB	118	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	119	{
	120	enum emulation_result er;
	121	int r;
	122
	123	er = kvmppc_emulate_instruction(run, vcpu);
	124	switch (er) {
	125	case EMULATE_DONE:
	126	/* Future optimization: only reload non-volatiles if they were
	127	* actually modified. */
	128	r = RESUME_GUEST_NV;
	129	break;
	130	case EMULATE_DO_MMIO:
	131	run->exit_reason = KVM_EXIT_MMIO;
	132	/* We must reload nonvolatiles because "update" load/store
	133	* instructions modify register state. */
	134	/* Future optimization: only reload non-volatiles if they were
	135	* actually modified. */
	136	r = RESUME_HOST_NV;
	137	break;
	138	case EMULATE_FAIL:
	139	/* XXX Deliver Program interrupt to guest. */
	140	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	141	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	142	r = RESUME_HOST;
	143	break;
	144	default:
	145	BUG();
	146	}
	147
	148	return r;
	149	}
	150
10474ae8	151	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	152	{
10474ae8	153	return 0;
bbf45ba5 HB	154	}
	155
	156	void kvm_arch_hardware_disable(void *garbage)
	157	{
	158	}
	159
	160	int kvm_arch_hardware_setup(void)
	161	{
	162	return 0;
	163	}
	164
	165	void kvm_arch_hardware_unsetup(void)
	166	{
	167	}
	168
	169	void kvm_arch_check_processor_compat(void *rtn)
	170	{
9dd921cf	171	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	172	}
bbf45ba5 HB	173
e08b9637	174	int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
bbf45ba5	175	{
e08b9637 CO	176	if (type)
	177	return -EINVAL;
	178
f9e0554d	179	return kvmppc_core_init_vm(kvm);
bbf45ba5 HB	180	}
bbf45ba5 HB	181
d89f5eff	182	void kvm_arch_destroy_vm(struct kvm *kvm)
bbf45ba5 HB	183	{
bbf45ba5 HB	184	unsigned int i;
988a2cae	185	struct kvm_vcpu *vcpu;
bbf45ba5	186
988a2cae GN	187	kvm_for_each_vcpu(i, vcpu, kvm)
	188	kvm_arch_vcpu_free(vcpu);
	189
	190	mutex_lock(&kvm->lock);
	191	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	192	kvm->vcpus[i] = NULL;
	193
	194	atomic_set(&kvm->online_vcpus, 0);
f9e0554d PM	195
	196	kvmppc_core_destroy_vm(kvm);
	197
988a2cae	198	mutex_unlock(&kvm->lock);
bbf45ba5 HB	199	}
bbf45ba5 HB	200
ad8ba2cd SY	201	void kvm_arch_sync_events(struct kvm *kvm)
	202	{
	203	}
	204
bbf45ba5 HB	205	int kvm_dev_ioctl_check_extension(long ext)
	206	{
	207	int r;
	208
	209	switch (ext) {
5ce941ee SW	210	#ifdef CONFIG_BOOKE
	211	case KVM_CAP_PPC_BOOKE_SREGS:
	212	#else
e15a1137	213	case KVM_CAP_PPC_SEGSTATE:
930b412a	214	case KVM_CAP_PPC_PAPR:
5ce941ee	215	#endif
18978768	216	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	217	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	218	case KVM_CAP_ENABLE_CAP:
de56a948 PM	219	r = 1;
	220	break;
	221	#ifndef CONFIG_KVM_BOOK3S_64_HV
	222	case KVM_CAP_PPC_PAIRED_SINGLES:
ad0a048b	223	case KVM_CAP_PPC_OSI:
15711e9c	224	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	225	r = 1;
e15a1137 AG	226	break;
588968b6 LV	227	case KVM_CAP_COALESCED_MMIO:
	228	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	229	break;
54738c09 DG	230	#endif
	231	#ifdef CONFIG_KVM_BOOK3S_64_HV
	232	case KVM_CAP_SPAPR_TCE:
	233	r = 1;
	234	break;
371fefd6 PM	235	case KVM_CAP_PPC_SMT:
	236	r = threads_per_core;
	237	break;
aa04b4cc PM	238	case KVM_CAP_PPC_RMA:
aa04b4cc PM	239	r = 1;
9e368f29 PM	240	/* PPC970 requires an RMA */
	241	if (cpu_has_feature(CPU_FTR_ARCH_201))
	242	r = 2;
aa04b4cc	243	break;
de56a948	244	#endif
bbf45ba5 HB	245	default:
	246	r = 0;
	247	break;
	248	}
	249	return r;
	250
	251	}
	252
	253	long kvm_arch_dev_ioctl(struct file *filp,
	254	unsigned int ioctl, unsigned long arg)
	255	{
	256	return -EINVAL;
	257	}
	258
f7784b8e MT	259	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	260	struct kvm_memory_slot *memslot,
	261	struct kvm_memory_slot old,
	262	struct kvm_userspace_memory_region *mem,
	263	int user_alloc)
bbf45ba5	264	{
f9e0554d	265	return kvmppc_core_prepare_memory_region(kvm, mem);
bbf45ba5 HB	266	}
bbf45ba5 HB	267
f7784b8e MT	268	void kvm_arch_commit_memory_region(struct kvm *kvm,
	269	struct kvm_userspace_memory_region *mem,
	270	struct kvm_memory_slot old,
	271	int user_alloc)
	272	{
f9e0554d	273	kvmppc_core_commit_memory_region(kvm, mem);
f7784b8e MT	274	}
	275
	276
34d4cb8f MT	277	void kvm_arch_flush_shadow(struct kvm *kvm)
	278	{
	279	}
	280
bbf45ba5 HB	281	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	282	{
73e75b41 HB	283	struct kvm_vcpu *vcpu;
73e75b41 HB	284	vcpu = kvmppc_core_vcpu_create(kvm, id);
19ccb76a	285	vcpu->arch.wqp = &vcpu->wq;
06056bfb WY	286	if (!IS_ERR(vcpu))
06056bfb WY	287	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	288	return vcpu;
bbf45ba5 HB	289	}
	290
	291	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	292	{
a595405d AG	293	/* Make sure we're not using the vcpu anymore */
	294	hrtimer_cancel(&vcpu->arch.dec_timer);
	295	tasklet_kill(&vcpu->arch.tasklet);
	296
73e75b41	297	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	298	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	299	}
	300
	301	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	302	{
	303	kvm_arch_vcpu_free(vcpu);
	304	}
	305
	306	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	307	{
9dd921cf	308	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	309	}
	310
	311	static void kvmppc_decrementer_func(unsigned long data)
	312	{
	313	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	314
9dd921cf	315	kvmppc_core_queue_dec(vcpu);
45c5eb67	316
19ccb76a PM	317	if (waitqueue_active(vcpu->arch.wqp)) {
19ccb76a PM	318	wake_up_interruptible(vcpu->arch.wqp);
45c5eb67 HB	319	vcpu->stat.halt_wakeup++;
45c5eb67 HB	320	}
bbf45ba5 HB	321	}
bbf45ba5 HB	322
544c6761 AG	323	/*
	324	* low level hrtimer wake routine. Because this runs in hardirq context
	325	* we schedule a tasklet to do the real work.
	326	*/
	327	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	328	{
	329	struct kvm_vcpu *vcpu;
	330
	331	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	332	tasklet_schedule(&vcpu->arch.tasklet);
	333
	334	return HRTIMER_NORESTART;
	335	}
	336
bbf45ba5 HB	337	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	338	{
544c6761 AG	339	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	340	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	341	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
de56a948	342	vcpu->arch.dec_expires = ~(u64)0;
bbf45ba5	343
09000adb BB	344	#ifdef CONFIG_KVM_EXIT_TIMING
	345	mutex_init(&vcpu->arch.exit_timing_lock);
	346	#endif
	347
bbf45ba5 HB	348	return 0;
	349	}
	350
	351	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	352	{
ecc0981f	353	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	354	}
	355
	356	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	357	{
eab17672 SW	358	#ifdef CONFIG_BOOKE
	359	/*
	360	* vrsave (formerly usprg0) isn't used by Linux, but may
	361	* be used by the guest.
	362	*
	363	* On non-booke this is associated with Altivec and
	364	* is handled by code in book3s.c.
	365	*/
	366	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	367	#endif
9dd921cf	368	kvmppc_core_vcpu_load(vcpu, cpu);
de56a948	369	vcpu->cpu = smp_processor_id();
bbf45ba5 HB	370	}
	371
	372	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	373	{
9dd921cf	374	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	375	#ifdef CONFIG_BOOKE
	376	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	377	#endif
de56a948	378	vcpu->cpu = -1;
bbf45ba5 HB	379	}
bbf45ba5 HB	380
d0bfb940	381	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	382	struct kvm_guest_debug *dbg)
bbf45ba5	383	{
f5d0906b	384	return -EINVAL;
bbf45ba5 HB	385	}
	386
	387	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	388	struct kvm_run *run)
	389	{
8e5b26b5	390	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	391	}
	392
	393	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	394	struct kvm_run *run)
	395	{
69b61833	396	u64 uninitialized_var(gpr);
bbf45ba5	397
8e5b26b5	398	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	399	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	400	return;
	401	}
	402
	403	if (vcpu->arch.mmio_is_bigendian) {
	404	switch (run->mmio.len) {
b104d066	405	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	406	case 4: gpr = (u32 )run->mmio.data; break;
	407	case 2: gpr = (u16 )run->mmio.data; break;
	408	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	409	}
	410	} else {
	411	/* Convert BE data from userland back to LE. */
	412	switch (run->mmio.len) {
8e5b26b5 AG	413	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	414	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	415	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	416	}
bbf45ba5 HB	417	}
8e5b26b5	418
3587d534 AG	419	if (vcpu->arch.mmio_sign_extend) {
	420	switch (run->mmio.len) {
	421	#ifdef CONFIG_PPC64
	422	case 4:
	423	gpr = (s64)(s32)gpr;
	424	break;
	425	#endif
	426	case 2:
	427	gpr = (s64)(s16)gpr;
	428	break;
	429	case 1:
	430	gpr = (s64)(s8)gpr;
	431	break;
	432	}
	433	}
	434
8e5b26b5	435	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	436
	437	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	438	case KVM_REG_GPR:
	439	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	440	break;
	441	case KVM_REG_FPR:
	442	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	443	break;
287d5611	444	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	445	case KVM_REG_QPR:
	446	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	447	break;
	448	case KVM_REG_FQPR:
	449	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	450	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	451	break;
287d5611	452	#endif
b104d066 AG	453	default:
	454	BUG();
	455	}
bbf45ba5 HB	456	}
	457
	458	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	459	unsigned int rt, unsigned int bytes, int is_bigendian)
	460	{
	461	if (bytes > sizeof(run->mmio.data)) {
	462	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	463	run->mmio.len);
	464	}
	465
	466	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	467	run->mmio.len = bytes;
	468	run->mmio.is_write = 0;
	469
	470	vcpu->arch.io_gpr = rt;
	471	vcpu->arch.mmio_is_bigendian = is_bigendian;
	472	vcpu->mmio_needed = 1;
	473	vcpu->mmio_is_write = 0;
3587d534	474	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	475
	476	return EMULATE_DO_MMIO;
	477	}
	478
3587d534 AG	479	/* Same as above, but sign extends */
	480	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	481	unsigned int rt, unsigned int bytes, int is_bigendian)
	482	{
	483	int r;
	484
	485	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	486	vcpu->arch.mmio_sign_extend = 1;
	487
	488	return r;
	489	}
	490
bbf45ba5	491	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	492	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	493	{
	494	void *data = run->mmio.data;
	495
	496	if (bytes > sizeof(run->mmio.data)) {
	497	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	498	run->mmio.len);
	499	}
	500
	501	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	502	run->mmio.len = bytes;
	503	run->mmio.is_write = 1;
	504	vcpu->mmio_needed = 1;
	505	vcpu->mmio_is_write = 1;
	506
	507	/* Store the value at the lowest bytes in 'data'. */
	508	if (is_bigendian) {
	509	switch (bytes) {
b104d066	510	case 8: (u64 )data = val; break;
bbf45ba5 HB	511	case 4: (u32 )data = val; break;
	512	case 2: (u16 )data = val; break;
	513	case 1: (u8 )data = val; break;
	514	}
	515	} else {
	516	/* Store LE value into 'data'. */
	517	switch (bytes) {
	518	case 4: st_le32(data, val); break;
	519	case 2: st_le16(data, val); break;
	520	case 1: (u8 )data = val; break;
	521	}
	522	}
	523
	524	return EMULATE_DO_MMIO;
	525	}
	526
	527	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	528	{
	529	int r;
	530	sigset_t sigsaved;
	531
	532	if (vcpu->sigset_active)
	533	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	534
	535	if (vcpu->mmio_needed) {
	536	if (!vcpu->mmio_is_write)
	537	kvmppc_complete_mmio_load(vcpu, run);
	538	vcpu->mmio_needed = 0;
	539	} else if (vcpu->arch.dcr_needed) {
	540	if (!vcpu->arch.dcr_is_write)
	541	kvmppc_complete_dcr_load(vcpu, run);
	542	vcpu->arch.dcr_needed = 0;
ad0a048b AG	543	} else if (vcpu->arch.osi_needed) {
	544	u64 *gprs = run->osi.gprs;
	545	int i;
	546
	547	for (i = 0; i < 32; i++)
	548	kvmppc_set_gpr(vcpu, i, gprs[i]);
	549	vcpu->arch.osi_needed = 0;
de56a948 PM	550	} else if (vcpu->arch.hcall_needed) {
	551	int i;
	552
	553	kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
	554	for (i = 0; i < 9; ++i)
	555	kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
	556	vcpu->arch.hcall_needed = 0;
bbf45ba5 HB	557	}
bbf45ba5 HB	558
9dd921cf	559	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5	560
df6909e5	561	r = kvmppc_vcpu_run(run, vcpu);
bbf45ba5 HB	562
	563	if (vcpu->sigset_active)
	564	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	565
	566	return r;
	567	}
	568
	569	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	570	{
19ccb76a	571	if (irq->irq == KVM_INTERRUPT_UNSET) {
18978768	572	kvmppc_core_dequeue_external(vcpu, irq);
19ccb76a PM	573	return 0;
	574	}
	575
	576	kvmppc_core_queue_external(vcpu, irq);
45c5eb67	577
19ccb76a PM	578	if (waitqueue_active(vcpu->arch.wqp)) {
19ccb76a PM	579	wake_up_interruptible(vcpu->arch.wqp);
45c5eb67	580	vcpu->stat.halt_wakeup++;
de56a948 PM	581	} else if (vcpu->cpu != -1) {
de56a948 PM	582	smp_send_reschedule(vcpu->cpu);
45c5eb67 HB	583	}
45c5eb67 HB	584
bbf45ba5 HB	585	return 0;
	586	}
	587
71fbfd5f AG	588	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	589	struct kvm_enable_cap *cap)
	590	{
	591	int r;
	592
	593	if (cap->flags)
	594	return -EINVAL;
	595
	596	switch (cap->cap) {
ad0a048b AG	597	case KVM_CAP_PPC_OSI:
	598	r = 0;
	599	vcpu->arch.osi_enabled = true;
	600	break;
930b412a AG	601	case KVM_CAP_PPC_PAPR:
	602	r = 0;
	603	vcpu->arch.papr_enabled = true;
	604	break;
71fbfd5f AG	605	default:
	606	r = -EINVAL;
	607	break;
	608	}
	609
af8f38b3 AG	610	if (!r)
	611	r = kvmppc_sanity_check(vcpu);
	612
71fbfd5f AG	613	return r;
	614	}
	615
bbf45ba5 HB	616	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	617	struct kvm_mp_state *mp_state)
	618	{
	619	return -EINVAL;
	620	}
	621
	622	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	623	struct kvm_mp_state *mp_state)
	624	{
	625	return -EINVAL;
	626	}
	627
	628	long kvm_arch_vcpu_ioctl(struct file *filp,
	629	unsigned int ioctl, unsigned long arg)
	630	{
	631	struct kvm_vcpu *vcpu = filp->private_data;
	632	void __user argp = (void __user )arg;
	633	long r;
	634
93736624 AK	635	switch (ioctl) {
93736624 AK	636	case KVM_INTERRUPT: {
bbf45ba5 HB	637	struct kvm_interrupt irq;
	638	r = -EFAULT;
	639	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	640	goto out;
bbf45ba5	641	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	642	goto out;
bbf45ba5	643	}
19483d14	644
71fbfd5f AG	645	case KVM_ENABLE_CAP:
	646	{
	647	struct kvm_enable_cap cap;
	648	r = -EFAULT;
	649	if (copy_from_user(&cap, argp, sizeof(cap)))
	650	goto out;
	651	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	652	break;
	653	}
bbf45ba5 HB	654	default:
	655	r = -EINVAL;
	656	}
	657
	658	out:
	659	return r;
	660	}
	661
5b1c1493 CO	662	int kvm_arch_vcpu_fault(struct kvm_vcpu vcpu, struct vm_fault vmf)
	663	{
	664	return VM_FAULT_SIGBUS;
	665	}
	666
15711e9c AG	667	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	668	{
	669	u32 inst_lis = 0x3c000000;
	670	u32 inst_ori = 0x60000000;
	671	u32 inst_nop = 0x60000000;
	672	u32 inst_sc = 0x44000002;
	673	u32 inst_imm_mask = 0xffff;
	674
	675	/*
	676	* The hypercall to get into KVM from within guest context is as
	677	* follows:
	678	*
	679	* lis r0, r0, KVM_SC_MAGIC_R0@h
	680	* ori r0, KVM_SC_MAGIC_R0@l
	681	* sc
	682	* nop
	683	*/
	684	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	685	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	686	pvinfo->hcall[2] = inst_sc;
	687	pvinfo->hcall[3] = inst_nop;
	688
	689	return 0;
	690	}
	691
bbf45ba5 HB	692	long kvm_arch_vm_ioctl(struct file *filp,
	693	unsigned int ioctl, unsigned long arg)
	694	{
15711e9c	695	void __user argp = (void __user )arg;
bbf45ba5 HB	696	long r;
	697
	698	switch (ioctl) {
15711e9c AG	699	case KVM_PPC_GET_PVINFO: {
15711e9c AG	700	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	701	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	702	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	703	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	704	r = -EFAULT;
	705	goto out;
	706	}
	707
	708	break;
	709	}
54738c09 DG	710	#ifdef CONFIG_KVM_BOOK3S_64_HV
	711	case KVM_CREATE_SPAPR_TCE: {
	712	struct kvm_create_spapr_tce create_tce;
	713	struct kvm *kvm = filp->private_data;
	714
	715	r = -EFAULT;
	716	if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
	717	goto out;
	718	r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
	719	goto out;
	720	}
aa04b4cc PM	721
	722	case KVM_ALLOCATE_RMA: {
	723	struct kvm *kvm = filp->private_data;
	724	struct kvm_allocate_rma rma;
	725
	726	r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
	727	if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
	728	r = -EFAULT;
	729	break;
	730	}
54738c09 DG	731	#endif /* CONFIG_KVM_BOOK3S_64_HV */
54738c09 DG	732
bbf45ba5	733	default:
367e1319	734	r = -ENOTTY;
bbf45ba5 HB	735	}
bbf45ba5 HB	736
15711e9c	737	out:
bbf45ba5 HB	738	return r;
	739	}
	740
	741	int kvm_arch_init(void *opaque)
	742	{
	743	return 0;
	744	}
	745
	746	void kvm_arch_exit(void)
	747	{
	748	}