[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 | KVM_MAGIC_FEAT_MAS0_TO_SPRG7;

		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:
#ifdef CONFIG_KVM_E500
	case KVM_CAP_SW_TLB:
#endif
		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;
	}

	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;
#ifdef CONFIG_KVM_E500
	case KVM_CAP_SW_TLB: {
		struct kvm_config_tlb cfg;
		void __user *user_ptr = (void __user *)(uintptr_t)cap->args[0];

		r = -EFAULT;
		if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
			break;

		r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
		break;
	}
#endif
	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;
	}

#ifdef CONFIG_KVM_E500
	case KVM_DIRTY_TLB: {
		struct kvm_dirty_tlb dirty;
		r = -EFAULT;
		if (copy_from_user(&dirty, argp, sizeof(dirty)))
			goto out;
		r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
		break;
	}
#endif

	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
b5904972	69	r2 = KVM_MAGIC_FEAT_SR \| KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
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:
dc83b8bc SW	225	#ifdef CONFIG_KVM_E500
	226	case KVM_CAP_SW_TLB:
	227	#endif
e15a1137 AG	228	r = 1;
e15a1137 AG	229	break;
588968b6 LV	230	case KVM_CAP_COALESCED_MMIO:
	231	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	232	break;
54738c09 DG	233	#endif
	234	#ifdef CONFIG_KVM_BOOK3S_64_HV
	235	case KVM_CAP_SPAPR_TCE:
	236	r = 1;
	237	break;
371fefd6 PM	238	case KVM_CAP_PPC_SMT:
	239	r = threads_per_core;
	240	break;
aa04b4cc PM	241	case KVM_CAP_PPC_RMA:
aa04b4cc PM	242	r = 1;
9e368f29 PM	243	/* PPC970 requires an RMA */
	244	if (cpu_has_feature(CPU_FTR_ARCH_201))
	245	r = 2;
aa04b4cc	246	break;
de56a948	247	#endif
bbf45ba5 HB	248	default:
	249	r = 0;
	250	break;
	251	}
	252	return r;
	253
	254	}
	255
	256	long kvm_arch_dev_ioctl(struct file *filp,
	257	unsigned int ioctl, unsigned long arg)
	258	{
	259	return -EINVAL;
	260	}
	261
f7784b8e MT	262	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	263	struct kvm_memory_slot *memslot,
	264	struct kvm_memory_slot old,
	265	struct kvm_userspace_memory_region *mem,
	266	int user_alloc)
bbf45ba5	267	{
f9e0554d	268	return kvmppc_core_prepare_memory_region(kvm, mem);
bbf45ba5 HB	269	}
bbf45ba5 HB	270
f7784b8e MT	271	void kvm_arch_commit_memory_region(struct kvm *kvm,
	272	struct kvm_userspace_memory_region *mem,
	273	struct kvm_memory_slot old,
	274	int user_alloc)
	275	{
f9e0554d	276	kvmppc_core_commit_memory_region(kvm, mem);
f7784b8e MT	277	}
	278
	279
34d4cb8f MT	280	void kvm_arch_flush_shadow(struct kvm *kvm)
	281	{
	282	}
	283
bbf45ba5 HB	284	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	285	{
73e75b41 HB	286	struct kvm_vcpu *vcpu;
73e75b41 HB	287	vcpu = kvmppc_core_vcpu_create(kvm, id);
19ccb76a	288	vcpu->arch.wqp = &vcpu->wq;
06056bfb WY	289	if (!IS_ERR(vcpu))
06056bfb WY	290	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	291	return vcpu;
bbf45ba5 HB	292	}
	293
	294	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	295	{
a595405d AG	296	/* Make sure we're not using the vcpu anymore */
	297	hrtimer_cancel(&vcpu->arch.dec_timer);
	298	tasklet_kill(&vcpu->arch.tasklet);
	299
73e75b41	300	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	301	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	302	}
	303
	304	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	305	{
	306	kvm_arch_vcpu_free(vcpu);
	307	}
	308
	309	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	310	{
9dd921cf	311	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	312	}
	313
	314	static void kvmppc_decrementer_func(unsigned long data)
	315	{
	316	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	317
9dd921cf	318	kvmppc_core_queue_dec(vcpu);
45c5eb67	319
19ccb76a PM	320	if (waitqueue_active(vcpu->arch.wqp)) {
19ccb76a PM	321	wake_up_interruptible(vcpu->arch.wqp);
45c5eb67 HB	322	vcpu->stat.halt_wakeup++;
45c5eb67 HB	323	}
bbf45ba5 HB	324	}
bbf45ba5 HB	325
544c6761 AG	326	/*
	327	* low level hrtimer wake routine. Because this runs in hardirq context
	328	* we schedule a tasklet to do the real work.
	329	*/
	330	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	331	{
	332	struct kvm_vcpu *vcpu;
	333
	334	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	335	tasklet_schedule(&vcpu->arch.tasklet);
	336
	337	return HRTIMER_NORESTART;
	338	}
	339
bbf45ba5 HB	340	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	341	{
544c6761 AG	342	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	343	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	344	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
de56a948	345	vcpu->arch.dec_expires = ~(u64)0;
bbf45ba5	346
09000adb BB	347	#ifdef CONFIG_KVM_EXIT_TIMING
	348	mutex_init(&vcpu->arch.exit_timing_lock);
	349	#endif
	350
bbf45ba5 HB	351	return 0;
	352	}
	353
	354	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	355	{
ecc0981f	356	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	357	}
	358
	359	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	360	{
eab17672 SW	361	#ifdef CONFIG_BOOKE
	362	/*
	363	* vrsave (formerly usprg0) isn't used by Linux, but may
	364	* be used by the guest.
	365	*
	366	* On non-booke this is associated with Altivec and
	367	* is handled by code in book3s.c.
	368	*/
	369	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	370	#endif
9dd921cf	371	kvmppc_core_vcpu_load(vcpu, cpu);
de56a948	372	vcpu->cpu = smp_processor_id();
bbf45ba5 HB	373	}
	374
	375	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	376	{
9dd921cf	377	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	378	#ifdef CONFIG_BOOKE
	379	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	380	#endif
de56a948	381	vcpu->cpu = -1;
bbf45ba5 HB	382	}
bbf45ba5 HB	383
d0bfb940	384	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	385	struct kvm_guest_debug *dbg)
bbf45ba5	386	{
f5d0906b	387	return -EINVAL;
bbf45ba5 HB	388	}
	389
	390	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	391	struct kvm_run *run)
	392	{
8e5b26b5	393	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	394	}
	395
	396	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	397	struct kvm_run *run)
	398	{
69b61833	399	u64 uninitialized_var(gpr);
bbf45ba5	400
8e5b26b5	401	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	402	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	403	return;
	404	}
	405
	406	if (vcpu->arch.mmio_is_bigendian) {
	407	switch (run->mmio.len) {
b104d066	408	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	409	case 4: gpr = (u32 )run->mmio.data; break;
	410	case 2: gpr = (u16 )run->mmio.data; break;
	411	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	412	}
	413	} else {
	414	/* Convert BE data from userland back to LE. */
	415	switch (run->mmio.len) {
8e5b26b5 AG	416	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	417	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	418	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	419	}
bbf45ba5 HB	420	}
8e5b26b5	421
3587d534 AG	422	if (vcpu->arch.mmio_sign_extend) {
	423	switch (run->mmio.len) {
	424	#ifdef CONFIG_PPC64
	425	case 4:
	426	gpr = (s64)(s32)gpr;
	427	break;
	428	#endif
	429	case 2:
	430	gpr = (s64)(s16)gpr;
	431	break;
	432	case 1:
	433	gpr = (s64)(s8)gpr;
	434	break;
	435	}
	436	}
	437
8e5b26b5	438	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	439
	440	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	441	case KVM_REG_GPR:
	442	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	443	break;
	444	case KVM_REG_FPR:
	445	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	446	break;
287d5611	447	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	448	case KVM_REG_QPR:
	449	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	450	break;
	451	case KVM_REG_FQPR:
	452	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	453	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	454	break;
287d5611	455	#endif
b104d066 AG	456	default:
	457	BUG();
	458	}
bbf45ba5 HB	459	}
	460
	461	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	462	unsigned int rt, unsigned int bytes, int is_bigendian)
	463	{
	464	if (bytes > sizeof(run->mmio.data)) {
	465	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	466	run->mmio.len);
	467	}
	468
	469	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	470	run->mmio.len = bytes;
	471	run->mmio.is_write = 0;
	472
	473	vcpu->arch.io_gpr = rt;
	474	vcpu->arch.mmio_is_bigendian = is_bigendian;
	475	vcpu->mmio_needed = 1;
	476	vcpu->mmio_is_write = 0;
3587d534	477	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	478
	479	return EMULATE_DO_MMIO;
	480	}
	481
3587d534 AG	482	/* Same as above, but sign extends */
	483	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	484	unsigned int rt, unsigned int bytes, int is_bigendian)
	485	{
	486	int r;
	487
	488	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	489	vcpu->arch.mmio_sign_extend = 1;
	490
	491	return r;
	492	}
	493
bbf45ba5	494	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	495	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	496	{
	497	void *data = run->mmio.data;
	498
	499	if (bytes > sizeof(run->mmio.data)) {
	500	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	501	run->mmio.len);
	502	}
	503
	504	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	505	run->mmio.len = bytes;
	506	run->mmio.is_write = 1;
	507	vcpu->mmio_needed = 1;
	508	vcpu->mmio_is_write = 1;
	509
	510	/* Store the value at the lowest bytes in 'data'. */
	511	if (is_bigendian) {
	512	switch (bytes) {
b104d066	513	case 8: (u64 )data = val; break;
bbf45ba5 HB	514	case 4: (u32 )data = val; break;
	515	case 2: (u16 )data = val; break;
	516	case 1: (u8 )data = val; break;
	517	}
	518	} else {
	519	/* Store LE value into 'data'. */
	520	switch (bytes) {
	521	case 4: st_le32(data, val); break;
	522	case 2: st_le16(data, val); break;
	523	case 1: (u8 )data = val; break;
	524	}
	525	}
	526
	527	return EMULATE_DO_MMIO;
	528	}
	529
	530	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	531	{
	532	int r;
	533	sigset_t sigsaved;
	534
	535	if (vcpu->sigset_active)
	536	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	537
	538	if (vcpu->mmio_needed) {
	539	if (!vcpu->mmio_is_write)
	540	kvmppc_complete_mmio_load(vcpu, run);
	541	vcpu->mmio_needed = 0;
	542	} else if (vcpu->arch.dcr_needed) {
	543	if (!vcpu->arch.dcr_is_write)
	544	kvmppc_complete_dcr_load(vcpu, run);
	545	vcpu->arch.dcr_needed = 0;
ad0a048b AG	546	} else if (vcpu->arch.osi_needed) {
	547	u64 *gprs = run->osi.gprs;
	548	int i;
	549
	550	for (i = 0; i < 32; i++)
	551	kvmppc_set_gpr(vcpu, i, gprs[i]);
	552	vcpu->arch.osi_needed = 0;
de56a948 PM	553	} else if (vcpu->arch.hcall_needed) {
	554	int i;
	555
	556	kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
	557	for (i = 0; i < 9; ++i)
	558	kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
	559	vcpu->arch.hcall_needed = 0;
bbf45ba5 HB	560	}
bbf45ba5 HB	561
df6909e5	562	r = kvmppc_vcpu_run(run, vcpu);
bbf45ba5 HB	563
	564	if (vcpu->sigset_active)
	565	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	566
	567	return r;
	568	}
	569
	570	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	571	{
19ccb76a	572	if (irq->irq == KVM_INTERRUPT_UNSET) {
18978768	573	kvmppc_core_dequeue_external(vcpu, irq);
19ccb76a PM	574	return 0;
	575	}
	576
	577	kvmppc_core_queue_external(vcpu, irq);
45c5eb67	578
19ccb76a PM	579	if (waitqueue_active(vcpu->arch.wqp)) {
19ccb76a PM	580	wake_up_interruptible(vcpu->arch.wqp);
45c5eb67	581	vcpu->stat.halt_wakeup++;
de56a948 PM	582	} else if (vcpu->cpu != -1) {
de56a948 PM	583	smp_send_reschedule(vcpu->cpu);
45c5eb67 HB	584	}
45c5eb67 HB	585
bbf45ba5 HB	586	return 0;
	587	}
	588
71fbfd5f AG	589	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	590	struct kvm_enable_cap *cap)
	591	{
	592	int r;
	593
	594	if (cap->flags)
	595	return -EINVAL;
	596
	597	switch (cap->cap) {
ad0a048b AG	598	case KVM_CAP_PPC_OSI:
	599	r = 0;
	600	vcpu->arch.osi_enabled = true;
	601	break;
930b412a AG	602	case KVM_CAP_PPC_PAPR:
	603	r = 0;
	604	vcpu->arch.papr_enabled = true;
	605	break;
dc83b8bc SW	606	#ifdef CONFIG_KVM_E500
	607	case KVM_CAP_SW_TLB: {
	608	struct kvm_config_tlb cfg;
	609	void __user user_ptr = (void __user )(uintptr_t)cap->args[0];
	610
	611	r = -EFAULT;
	612	if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
	613	break;
	614
	615	r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
	616	break;
	617	}
	618	#endif
71fbfd5f AG	619	default:
	620	r = -EINVAL;
	621	break;
	622	}
	623
af8f38b3 AG	624	if (!r)
	625	r = kvmppc_sanity_check(vcpu);
	626
71fbfd5f AG	627	return r;
	628	}
	629
bbf45ba5 HB	630	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	631	struct kvm_mp_state *mp_state)
	632	{
	633	return -EINVAL;
	634	}
	635
	636	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	637	struct kvm_mp_state *mp_state)
	638	{
	639	return -EINVAL;
	640	}
	641
	642	long kvm_arch_vcpu_ioctl(struct file *filp,
	643	unsigned int ioctl, unsigned long arg)
	644	{
	645	struct kvm_vcpu *vcpu = filp->private_data;
	646	void __user argp = (void __user )arg;
	647	long r;
	648
93736624 AK	649	switch (ioctl) {
93736624 AK	650	case KVM_INTERRUPT: {
bbf45ba5 HB	651	struct kvm_interrupt irq;
	652	r = -EFAULT;
	653	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	654	goto out;
bbf45ba5	655	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	656	goto out;
bbf45ba5	657	}
19483d14	658
71fbfd5f AG	659	case KVM_ENABLE_CAP:
	660	{
	661	struct kvm_enable_cap cap;
	662	r = -EFAULT;
	663	if (copy_from_user(&cap, argp, sizeof(cap)))
	664	goto out;
	665	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	666	break;
	667	}
dc83b8bc SW	668
	669	#ifdef CONFIG_KVM_E500
	670	case KVM_DIRTY_TLB: {
	671	struct kvm_dirty_tlb dirty;
	672	r = -EFAULT;
	673	if (copy_from_user(&dirty, argp, sizeof(dirty)))
	674	goto out;
	675	r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
	676	break;
	677	}
	678	#endif
	679
bbf45ba5 HB	680	default:
	681	r = -EINVAL;
	682	}
	683
	684	out:
	685	return r;
	686	}
	687
5b1c1493 CO	688	int kvm_arch_vcpu_fault(struct kvm_vcpu vcpu, struct vm_fault vmf)
	689	{
	690	return VM_FAULT_SIGBUS;
	691	}
	692
15711e9c AG	693	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	694	{
	695	u32 inst_lis = 0x3c000000;
	696	u32 inst_ori = 0x60000000;
	697	u32 inst_nop = 0x60000000;
	698	u32 inst_sc = 0x44000002;
	699	u32 inst_imm_mask = 0xffff;
	700
	701	/*
	702	* The hypercall to get into KVM from within guest context is as
	703	* follows:
	704	*
	705	* lis r0, r0, KVM_SC_MAGIC_R0@h
	706	* ori r0, KVM_SC_MAGIC_R0@l
	707	* sc
	708	* nop
	709	*/
	710	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	711	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	712	pvinfo->hcall[2] = inst_sc;
	713	pvinfo->hcall[3] = inst_nop;
	714
	715	return 0;
	716	}
	717
bbf45ba5 HB	718	long kvm_arch_vm_ioctl(struct file *filp,
	719	unsigned int ioctl, unsigned long arg)
	720	{
15711e9c	721	void __user argp = (void __user )arg;
bbf45ba5 HB	722	long r;
	723
	724	switch (ioctl) {
15711e9c AG	725	case KVM_PPC_GET_PVINFO: {
15711e9c AG	726	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	727	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	728	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	729	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	730	r = -EFAULT;
	731	goto out;
	732	}
	733
	734	break;
	735	}
54738c09 DG	736	#ifdef CONFIG_KVM_BOOK3S_64_HV
	737	case KVM_CREATE_SPAPR_TCE: {
	738	struct kvm_create_spapr_tce create_tce;
	739	struct kvm *kvm = filp->private_data;
	740
	741	r = -EFAULT;
	742	if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
	743	goto out;
	744	r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
	745	goto out;
	746	}
aa04b4cc PM	747
	748	case KVM_ALLOCATE_RMA: {
	749	struct kvm *kvm = filp->private_data;
	750	struct kvm_allocate_rma rma;
	751
	752	r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
	753	if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
	754	r = -EFAULT;
	755	break;
	756	}
54738c09 DG	757	#endif /* CONFIG_KVM_BOOK3S_64_HV */
54738c09 DG	758
bbf45ba5	759	default:
367e1319	760	r = -ENOTTY;
bbf45ba5 HB	761	}
bbf45ba5 HB	762
15711e9c	763	out:
bbf45ba5 HB	764	return r;
	765	}
	766
	767	int kvm_arch_init(void *opaque)
	768	{
	769	return 0;
	770	}
	771
	772	void kvm_arch_exit(void)
	773	{
	774	}