[mirror_ubuntu-zesty-kernel.git] / arch / powerpc / kvm / powerpc.c

/*
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2, as
 * published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Copyright IBM Corp. 2007
 *
 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
 *          Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
 */

#include <linux/errno.h>
#include <linux/err.h>
#include <linux/kvm_host.h>
#include <linux/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) ||
	       v->requests;
}

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);
}

/*
 * 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;
}

void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
{
	int me;
	int cpu = vcpu->cpu;

	me = get_cpu();
	if (waitqueue_active(vcpu->arch.wqp)) {
		wake_up_interruptible(vcpu->arch.wqp);
		vcpu->stat.halt_wakeup++;
	} else if (cpu != me && cpu != -1) {
		smp_send_reschedule(vcpu->cpu);
	}
	put_cpu();
}

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);
	kvm_vcpu_kick(vcpu);

	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	41	return !(v->arch.shared->msr & MSR_WE) \|\|
dfd4d47e SW	42	!!(v->arch.pending_exceptions) \|\|
dfd4d47e SW	43	v->requests;
bbf45ba5 HB	44	}
bbf45ba5 HB	45
2a342ed5 AG	46	int kvmppc_kvm_pv(struct kvm_vcpu *vcpu)
	47	{
	48	int nr = kvmppc_get_gpr(vcpu, 11);
	49	int r;
	50	unsigned long __maybe_unused param1 = kvmppc_get_gpr(vcpu, 3);
	51	unsigned long __maybe_unused param2 = kvmppc_get_gpr(vcpu, 4);
	52	unsigned long __maybe_unused param3 = kvmppc_get_gpr(vcpu, 5);
	53	unsigned long __maybe_unused param4 = kvmppc_get_gpr(vcpu, 6);
	54	unsigned long r2 = 0;
	55
	56	if (!(vcpu->arch.shared->msr & MSR_SF)) {
	57	/* 32 bit mode */
	58	param1 &= 0xffffffff;
	59	param2 &= 0xffffffff;
	60	param3 &= 0xffffffff;
	61	param4 &= 0xffffffff;
	62	}
	63
	64	switch (nr) {
5fc87407 AG	65	case HC_VENDOR_KVM \| KVM_HC_PPC_MAP_MAGIC_PAGE:
	66	{
	67	vcpu->arch.magic_page_pa = param1;
	68	vcpu->arch.magic_page_ea = param2;
	69
b5904972	70	r2 = KVM_MAGIC_FEAT_SR \| KVM_MAGIC_FEAT_MAS0_TO_SPRG7;
7508e16c	71
5fc87407 AG	72	r = HC_EV_SUCCESS;
	73	break;
	74	}
2a342ed5 AG	75	case HC_VENDOR_KVM \| KVM_HC_FEATURES:
2a342ed5 AG	76	r = HC_EV_SUCCESS;
a4cd8b23 SW	77	#if defined(CONFIG_PPC_BOOK3S) \|\| defined(CONFIG_KVM_E500)
a4cd8b23 SW	78	/* XXX Missing magic page on 44x */
5fc87407 AG	79	r2 \|= (1 << KVM_FEATURE_MAGIC_PAGE);
5fc87407 AG	80	#endif
2a342ed5 AG	81
2a342ed5 AG	82	/* Second return value is in r4 */
2a342ed5 AG	83	break;
	84	default:
	85	r = HC_EV_UNIMPLEMENTED;
	86	break;
	87	}
	88
7508e16c AG	89	kvmppc_set_gpr(vcpu, 4, r2);
7508e16c AG	90
2a342ed5 AG	91	return r;
2a342ed5 AG	92	}
bbf45ba5	93
af8f38b3 AG	94	int kvmppc_sanity_check(struct kvm_vcpu *vcpu)
	95	{
	96	int r = false;
	97
	98	/* We have to know what CPU to virtualize */
	99	if (!vcpu->arch.pvr)
	100	goto out;
	101
	102	/* PAPR only works with book3s_64 */
	103	if ((vcpu->arch.cpu_type != KVM_CPU_3S_64) && vcpu->arch.papr_enabled)
	104	goto out;
	105
	106	#ifdef CONFIG_KVM_BOOK3S_64_HV
	107	/* HV KVM can only do PAPR mode for now */
	108	if (!vcpu->arch.papr_enabled)
	109	goto out;
	110	#endif
	111
	112	r = true;
	113
	114	out:
	115	vcpu->arch.sane = r;
	116	return r ? 0 : -EINVAL;
	117	}
	118
bbf45ba5 HB	119	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	120	{
	121	enum emulation_result er;
	122	int r;
	123
	124	er = kvmppc_emulate_instruction(run, vcpu);
	125	switch (er) {
	126	case EMULATE_DONE:
	127	/* Future optimization: only reload non-volatiles if they were
	128	* actually modified. */
	129	r = RESUME_GUEST_NV;
	130	break;
	131	case EMULATE_DO_MMIO:
	132	run->exit_reason = KVM_EXIT_MMIO;
	133	/* We must reload nonvolatiles because "update" load/store
	134	* instructions modify register state. */
	135	/* Future optimization: only reload non-volatiles if they were
	136	* actually modified. */
	137	r = RESUME_HOST_NV;
	138	break;
	139	case EMULATE_FAIL:
	140	/* XXX Deliver Program interrupt to guest. */
	141	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	142	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	143	r = RESUME_HOST;
	144	break;
	145	default:
	146	BUG();
	147	}
	148
	149	return r;
	150	}
	151
10474ae8	152	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	153	{
10474ae8	154	return 0;
bbf45ba5 HB	155	}
	156
	157	void kvm_arch_hardware_disable(void *garbage)
	158	{
	159	}
	160
	161	int kvm_arch_hardware_setup(void)
	162	{
	163	return 0;
	164	}
	165
	166	void kvm_arch_hardware_unsetup(void)
	167	{
	168	}
	169
	170	void kvm_arch_check_processor_compat(void *rtn)
	171	{
9dd921cf	172	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	173	}
bbf45ba5 HB	174
e08b9637	175	int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
bbf45ba5	176	{
e08b9637 CO	177	if (type)
	178	return -EINVAL;
	179
f9e0554d	180	return kvmppc_core_init_vm(kvm);
bbf45ba5 HB	181	}
bbf45ba5 HB	182
d89f5eff	183	void kvm_arch_destroy_vm(struct kvm *kvm)
bbf45ba5 HB	184	{
bbf45ba5 HB	185	unsigned int i;
988a2cae	186	struct kvm_vcpu *vcpu;
bbf45ba5	187
988a2cae GN	188	kvm_for_each_vcpu(i, vcpu, kvm)
	189	kvm_arch_vcpu_free(vcpu);
	190
	191	mutex_lock(&kvm->lock);
	192	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	193	kvm->vcpus[i] = NULL;
	194
	195	atomic_set(&kvm->online_vcpus, 0);
f9e0554d PM	196
	197	kvmppc_core_destroy_vm(kvm);
	198
988a2cae	199	mutex_unlock(&kvm->lock);
bbf45ba5 HB	200	}
bbf45ba5 HB	201
ad8ba2cd SY	202	void kvm_arch_sync_events(struct kvm *kvm)
	203	{
	204	}
	205
bbf45ba5 HB	206	int kvm_dev_ioctl_check_extension(long ext)
	207	{
	208	int r;
	209
	210	switch (ext) {
5ce941ee SW	211	#ifdef CONFIG_BOOKE
	212	case KVM_CAP_PPC_BOOKE_SREGS:
	213	#else
e15a1137	214	case KVM_CAP_PPC_SEGSTATE:
930b412a	215	case KVM_CAP_PPC_PAPR:
5ce941ee	216	#endif
18978768	217	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	218	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	219	case KVM_CAP_ENABLE_CAP:
de56a948 PM	220	r = 1;
	221	break;
	222	#ifndef CONFIG_KVM_BOOK3S_64_HV
	223	case KVM_CAP_PPC_PAIRED_SINGLES:
ad0a048b	224	case KVM_CAP_PPC_OSI:
15711e9c	225	case KVM_CAP_PPC_GET_PVINFO:
dc83b8bc SW	226	#ifdef CONFIG_KVM_E500
	227	case KVM_CAP_SW_TLB:
	228	#endif
e15a1137 AG	229	r = 1;
e15a1137 AG	230	break;
588968b6 LV	231	case KVM_CAP_COALESCED_MMIO:
	232	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	233	break;
54738c09 DG	234	#endif
	235	#ifdef CONFIG_KVM_BOOK3S_64_HV
	236	case KVM_CAP_SPAPR_TCE:
	237	r = 1;
	238	break;
371fefd6 PM	239	case KVM_CAP_PPC_SMT:
	240	r = threads_per_core;
	241	break;
aa04b4cc PM	242	case KVM_CAP_PPC_RMA:
aa04b4cc PM	243	r = 1;
9e368f29 PM	244	/* PPC970 requires an RMA */
	245	if (cpu_has_feature(CPU_FTR_ARCH_201))
	246	r = 2;
aa04b4cc	247	break;
de56a948	248	#endif
bbf45ba5 HB	249	default:
	250	r = 0;
	251	break;
	252	}
	253	return r;
	254
	255	}
	256
	257	long kvm_arch_dev_ioctl(struct file *filp,
	258	unsigned int ioctl, unsigned long arg)
	259	{
	260	return -EINVAL;
	261	}
	262
f7784b8e MT	263	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	264	struct kvm_memory_slot *memslot,
	265	struct kvm_memory_slot old,
	266	struct kvm_userspace_memory_region *mem,
	267	int user_alloc)
bbf45ba5	268	{
f9e0554d	269	return kvmppc_core_prepare_memory_region(kvm, mem);
bbf45ba5 HB	270	}
bbf45ba5 HB	271
f7784b8e MT	272	void kvm_arch_commit_memory_region(struct kvm *kvm,
	273	struct kvm_userspace_memory_region *mem,
	274	struct kvm_memory_slot old,
	275	int user_alloc)
	276	{
f9e0554d	277	kvmppc_core_commit_memory_region(kvm, mem);
f7784b8e MT	278	}
	279
	280
34d4cb8f MT	281	void kvm_arch_flush_shadow(struct kvm *kvm)
	282	{
	283	}
	284
bbf45ba5 HB	285	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	286	{
73e75b41 HB	287	struct kvm_vcpu *vcpu;
73e75b41 HB	288	vcpu = kvmppc_core_vcpu_create(kvm, id);
19ccb76a	289	vcpu->arch.wqp = &vcpu->wq;
06056bfb WY	290	if (!IS_ERR(vcpu))
06056bfb WY	291	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	292	return vcpu;
bbf45ba5 HB	293	}
	294
	295	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	296	{
a595405d AG	297	/* Make sure we're not using the vcpu anymore */
	298	hrtimer_cancel(&vcpu->arch.dec_timer);
	299	tasklet_kill(&vcpu->arch.tasklet);
	300
73e75b41	301	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	302	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	303	}
	304
	305	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	306	{
	307	kvm_arch_vcpu_free(vcpu);
	308	}
	309
	310	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	311	{
9dd921cf	312	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	313	}
bbf45ba5 HB	314
544c6761 AG	315	/*
	316	* low level hrtimer wake routine. Because this runs in hardirq context
	317	* we schedule a tasklet to do the real work.
	318	*/
	319	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	320	{
	321	struct kvm_vcpu *vcpu;
	322
	323	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	324	tasklet_schedule(&vcpu->arch.tasklet);
	325
	326	return HRTIMER_NORESTART;
	327	}
	328
bbf45ba5 HB	329	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	330	{
544c6761 AG	331	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	332	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	333	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
de56a948	334	vcpu->arch.dec_expires = ~(u64)0;
bbf45ba5	335
09000adb BB	336	#ifdef CONFIG_KVM_EXIT_TIMING
	337	mutex_init(&vcpu->arch.exit_timing_lock);
	338	#endif
	339
bbf45ba5 HB	340	return 0;
	341	}
	342
	343	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	344	{
ecc0981f	345	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	346	}
	347
	348	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	349	{
eab17672 SW	350	#ifdef CONFIG_BOOKE
	351	/*
	352	* vrsave (formerly usprg0) isn't used by Linux, but may
	353	* be used by the guest.
	354	*
	355	* On non-booke this is associated with Altivec and
	356	* is handled by code in book3s.c.
	357	*/
	358	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	359	#endif
9dd921cf	360	kvmppc_core_vcpu_load(vcpu, cpu);
de56a948	361	vcpu->cpu = smp_processor_id();
bbf45ba5 HB	362	}
	363
	364	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	365	{
9dd921cf	366	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	367	#ifdef CONFIG_BOOKE
	368	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	369	#endif
de56a948	370	vcpu->cpu = -1;
bbf45ba5 HB	371	}
bbf45ba5 HB	372
d0bfb940	373	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	374	struct kvm_guest_debug *dbg)
bbf45ba5	375	{
f5d0906b	376	return -EINVAL;
bbf45ba5 HB	377	}
	378
	379	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	380	struct kvm_run *run)
	381	{
8e5b26b5	382	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	383	}
	384
	385	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	386	struct kvm_run *run)
	387	{
69b61833	388	u64 uninitialized_var(gpr);
bbf45ba5	389
8e5b26b5	390	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	391	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	392	return;
	393	}
	394
	395	if (vcpu->arch.mmio_is_bigendian) {
	396	switch (run->mmio.len) {
b104d066	397	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	398	case 4: gpr = (u32 )run->mmio.data; break;
	399	case 2: gpr = (u16 )run->mmio.data; break;
	400	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	401	}
	402	} else {
	403	/* Convert BE data from userland back to LE. */
	404	switch (run->mmio.len) {
8e5b26b5 AG	405	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	406	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	407	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	408	}
bbf45ba5 HB	409	}
8e5b26b5	410
3587d534 AG	411	if (vcpu->arch.mmio_sign_extend) {
	412	switch (run->mmio.len) {
	413	#ifdef CONFIG_PPC64
	414	case 4:
	415	gpr = (s64)(s32)gpr;
	416	break;
	417	#endif
	418	case 2:
	419	gpr = (s64)(s16)gpr;
	420	break;
	421	case 1:
	422	gpr = (s64)(s8)gpr;
	423	break;
	424	}
	425	}
	426
8e5b26b5	427	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	428
	429	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	430	case KVM_REG_GPR:
	431	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	432	break;
	433	case KVM_REG_FPR:
	434	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	435	break;
287d5611	436	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	437	case KVM_REG_QPR:
	438	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	439	break;
	440	case KVM_REG_FQPR:
	441	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	442	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	443	break;
287d5611	444	#endif
b104d066 AG	445	default:
	446	BUG();
	447	}
bbf45ba5 HB	448	}
	449
	450	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	451	unsigned int rt, unsigned int bytes, int is_bigendian)
	452	{
	453	if (bytes > sizeof(run->mmio.data)) {
	454	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	455	run->mmio.len);
	456	}
	457
	458	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	459	run->mmio.len = bytes;
	460	run->mmio.is_write = 0;
	461
	462	vcpu->arch.io_gpr = rt;
	463	vcpu->arch.mmio_is_bigendian = is_bigendian;
	464	vcpu->mmio_needed = 1;
	465	vcpu->mmio_is_write = 0;
3587d534	466	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	467
	468	return EMULATE_DO_MMIO;
	469	}
	470
3587d534 AG	471	/* Same as above, but sign extends */
	472	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	473	unsigned int rt, unsigned int bytes, int is_bigendian)
	474	{
	475	int r;
	476
	477	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	478	vcpu->arch.mmio_sign_extend = 1;
	479
	480	return r;
	481	}
	482
bbf45ba5	483	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	484	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	485	{
	486	void *data = run->mmio.data;
	487
	488	if (bytes > sizeof(run->mmio.data)) {
	489	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	490	run->mmio.len);
	491	}
	492
	493	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	494	run->mmio.len = bytes;
	495	run->mmio.is_write = 1;
	496	vcpu->mmio_needed = 1;
	497	vcpu->mmio_is_write = 1;
	498
	499	/* Store the value at the lowest bytes in 'data'. */
	500	if (is_bigendian) {
	501	switch (bytes) {
b104d066	502	case 8: (u64 )data = val; break;
bbf45ba5 HB	503	case 4: (u32 )data = val; break;
	504	case 2: (u16 )data = val; break;
	505	case 1: (u8 )data = val; break;
	506	}
	507	} else {
	508	/* Store LE value into 'data'. */
	509	switch (bytes) {
	510	case 4: st_le32(data, val); break;
	511	case 2: st_le16(data, val); break;
	512	case 1: (u8 )data = val; break;
	513	}
	514	}
	515
	516	return EMULATE_DO_MMIO;
	517	}
	518
	519	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	520	{
	521	int r;
	522	sigset_t sigsaved;
	523
	524	if (vcpu->sigset_active)
	525	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	526
	527	if (vcpu->mmio_needed) {
	528	if (!vcpu->mmio_is_write)
	529	kvmppc_complete_mmio_load(vcpu, run);
	530	vcpu->mmio_needed = 0;
	531	} else if (vcpu->arch.dcr_needed) {
	532	if (!vcpu->arch.dcr_is_write)
	533	kvmppc_complete_dcr_load(vcpu, run);
	534	vcpu->arch.dcr_needed = 0;
ad0a048b AG	535	} else if (vcpu->arch.osi_needed) {
	536	u64 *gprs = run->osi.gprs;
	537	int i;
	538
	539	for (i = 0; i < 32; i++)
	540	kvmppc_set_gpr(vcpu, i, gprs[i]);
	541	vcpu->arch.osi_needed = 0;
de56a948 PM	542	} else if (vcpu->arch.hcall_needed) {
	543	int i;
	544
	545	kvmppc_set_gpr(vcpu, 3, run->papr_hcall.ret);
	546	for (i = 0; i < 9; ++i)
	547	kvmppc_set_gpr(vcpu, 4 + i, run->papr_hcall.args[i]);
	548	vcpu->arch.hcall_needed = 0;
bbf45ba5 HB	549	}
bbf45ba5 HB	550
df6909e5	551	r = kvmppc_vcpu_run(run, vcpu);
bbf45ba5 HB	552
	553	if (vcpu->sigset_active)
	554	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	555
	556	return r;
	557	}
	558
dfd4d47e SW	559	void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
dfd4d47e SW	560	{
ae21216b AG	561	int me;
	562	int cpu = vcpu->cpu;
	563
	564	me = get_cpu();
4e72dbe1	565	if (waitqueue_active(vcpu->arch.wqp)) {
dfd4d47e SW	566	wake_up_interruptible(vcpu->arch.wqp);
dfd4d47e SW	567	vcpu->stat.halt_wakeup++;
ae21216b	568	} else if (cpu != me && cpu != -1) {
dfd4d47e SW	569	smp_send_reschedule(vcpu->cpu);
dfd4d47e SW	570	}
ae21216b	571	put_cpu();
dfd4d47e SW	572	}
dfd4d47e SW	573
bbf45ba5 HB	574	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
bbf45ba5 HB	575	{
19ccb76a	576	if (irq->irq == KVM_INTERRUPT_UNSET) {
18978768	577	kvmppc_core_dequeue_external(vcpu, irq);
19ccb76a PM	578	return 0;
	579	}
	580
	581	kvmppc_core_queue_external(vcpu, irq);
dfd4d47e	582	kvm_vcpu_kick(vcpu);
45c5eb67	583
bbf45ba5 HB	584	return 0;
	585	}
	586
71fbfd5f AG	587	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	588	struct kvm_enable_cap *cap)
	589	{
	590	int r;
	591
	592	if (cap->flags)
	593	return -EINVAL;
	594
	595	switch (cap->cap) {
ad0a048b AG	596	case KVM_CAP_PPC_OSI:
	597	r = 0;
	598	vcpu->arch.osi_enabled = true;
	599	break;
930b412a AG	600	case KVM_CAP_PPC_PAPR:
	601	r = 0;
	602	vcpu->arch.papr_enabled = true;
	603	break;
dc83b8bc SW	604	#ifdef CONFIG_KVM_E500
	605	case KVM_CAP_SW_TLB: {
	606	struct kvm_config_tlb cfg;
	607	void __user user_ptr = (void __user )(uintptr_t)cap->args[0];
	608
	609	r = -EFAULT;
	610	if (copy_from_user(&cfg, user_ptr, sizeof(cfg)))
	611	break;
	612
	613	r = kvm_vcpu_ioctl_config_tlb(vcpu, &cfg);
	614	break;
	615	}
	616	#endif
71fbfd5f AG	617	default:
	618	r = -EINVAL;
	619	break;
	620	}
	621
af8f38b3 AG	622	if (!r)
	623	r = kvmppc_sanity_check(vcpu);
	624
71fbfd5f AG	625	return r;
	626	}
	627
bbf45ba5 HB	628	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	629	struct kvm_mp_state *mp_state)
	630	{
	631	return -EINVAL;
	632	}
	633
	634	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	635	struct kvm_mp_state *mp_state)
	636	{
	637	return -EINVAL;
	638	}
	639
	640	long kvm_arch_vcpu_ioctl(struct file *filp,
	641	unsigned int ioctl, unsigned long arg)
	642	{
	643	struct kvm_vcpu *vcpu = filp->private_data;
	644	void __user argp = (void __user )arg;
	645	long r;
	646
93736624 AK	647	switch (ioctl) {
93736624 AK	648	case KVM_INTERRUPT: {
bbf45ba5 HB	649	struct kvm_interrupt irq;
	650	r = -EFAULT;
	651	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	652	goto out;
bbf45ba5	653	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	654	goto out;
bbf45ba5	655	}
19483d14	656
71fbfd5f AG	657	case KVM_ENABLE_CAP:
	658	{
	659	struct kvm_enable_cap cap;
	660	r = -EFAULT;
	661	if (copy_from_user(&cap, argp, sizeof(cap)))
	662	goto out;
	663	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	664	break;
	665	}
dc83b8bc SW	666
	667	#ifdef CONFIG_KVM_E500
	668	case KVM_DIRTY_TLB: {
	669	struct kvm_dirty_tlb dirty;
	670	r = -EFAULT;
	671	if (copy_from_user(&dirty, argp, sizeof(dirty)))
	672	goto out;
	673	r = kvm_vcpu_ioctl_dirty_tlb(vcpu, &dirty);
	674	break;
	675	}
	676	#endif
	677
bbf45ba5 HB	678	default:
	679	r = -EINVAL;
	680	}
	681
	682	out:
	683	return r;
	684	}
	685
5b1c1493 CO	686	int kvm_arch_vcpu_fault(struct kvm_vcpu vcpu, struct vm_fault vmf)
	687	{
	688	return VM_FAULT_SIGBUS;
	689	}
	690
15711e9c AG	691	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	692	{
	693	u32 inst_lis = 0x3c000000;
	694	u32 inst_ori = 0x60000000;
	695	u32 inst_nop = 0x60000000;
	696	u32 inst_sc = 0x44000002;
	697	u32 inst_imm_mask = 0xffff;
	698
	699	/*
	700	* The hypercall to get into KVM from within guest context is as
	701	* follows:
	702	*
	703	* lis r0, r0, KVM_SC_MAGIC_R0@h
	704	* ori r0, KVM_SC_MAGIC_R0@l
	705	* sc
	706	* nop
	707	*/
	708	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	709	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	710	pvinfo->hcall[2] = inst_sc;
	711	pvinfo->hcall[3] = inst_nop;
	712
	713	return 0;
	714	}
	715
bbf45ba5 HB	716	long kvm_arch_vm_ioctl(struct file *filp,
	717	unsigned int ioctl, unsigned long arg)
	718	{
15711e9c	719	void __user argp = (void __user )arg;
bbf45ba5 HB	720	long r;
	721
	722	switch (ioctl) {
15711e9c AG	723	case KVM_PPC_GET_PVINFO: {
15711e9c AG	724	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	725	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	726	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	727	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	728	r = -EFAULT;
	729	goto out;
	730	}
	731
	732	break;
	733	}
54738c09 DG	734	#ifdef CONFIG_KVM_BOOK3S_64_HV
	735	case KVM_CREATE_SPAPR_TCE: {
	736	struct kvm_create_spapr_tce create_tce;
	737	struct kvm *kvm = filp->private_data;
	738
	739	r = -EFAULT;
	740	if (copy_from_user(&create_tce, argp, sizeof(create_tce)))
	741	goto out;
	742	r = kvm_vm_ioctl_create_spapr_tce(kvm, &create_tce);
	743	goto out;
	744	}
aa04b4cc PM	745
	746	case KVM_ALLOCATE_RMA: {
	747	struct kvm *kvm = filp->private_data;
	748	struct kvm_allocate_rma rma;
	749
	750	r = kvm_vm_ioctl_allocate_rma(kvm, &rma);
	751	if (r >= 0 && copy_to_user(argp, &rma, sizeof(rma)))
	752	r = -EFAULT;
	753	break;
	754	}
54738c09 DG	755	#endif /* CONFIG_KVM_BOOK3S_64_HV */
54738c09 DG	756
bbf45ba5	757	default:
367e1319	758	r = -ENOTTY;
bbf45ba5 HB	759	}
bbf45ba5 HB	760
15711e9c	761	out:
bbf45ba5 HB	762	return r;
	763	}
	764
	765	int kvm_arch_init(void *opaque)
	766	{
	767	return 0;
	768	}
	769
	770	void kvm_arch_exit(void)
	771	{
	772	}