[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/module.h>
#include <linux/vmalloc.h>
#include <linux/hrtimer.h>
#include <linux/fs.h>
#include <linux/slab.h>
#include <asm/cputable.h>
#include <asm/uaccess.h>
#include <asm/kvm_ppc.h>
#include <asm/tlbflush.h>
#include "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) /* XXX Missing magic page on BookE */
		r2 |= (1 << KVM_FEATURE_MAGIC_PAGE);
#endif

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

	kvmppc_set_gpr(vcpu, 4, r2);

	return r;
}

int kvmppc_emulate_mmio(struct kvm_run *run, struct kvm_vcpu *vcpu)
{
	enum emulation_result er;
	int r;

	er = kvmppc_emulate_instruction(run, vcpu);
	switch (er) {
	case EMULATE_DONE:
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_GUEST_NV;
		break;
	case EMULATE_DO_MMIO:
		run->exit_reason = KVM_EXIT_MMIO;
		/* We must reload nonvolatiles because "update" load/store
		 * instructions modify register state. */
		/* Future optimization: only reload non-volatiles if they were
		 * actually modified. */
		r = RESUME_HOST_NV;
		break;
	case EMULATE_FAIL:
		/* XXX Deliver Program interrupt to guest. */
		printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
		       kvmppc_get_last_inst(vcpu));
		r = RESUME_HOST;
		break;
	default:
		BUG();
	}

	return r;
}

int kvm_arch_hardware_enable(void *garbage)
{
	return 0;
}

void kvm_arch_hardware_disable(void *garbage)
{
}

int kvm_arch_hardware_setup(void)
{
	return 0;
}

void kvm_arch_hardware_unsetup(void)
{
}

void kvm_arch_check_processor_compat(void *rtn)
{
	*(int *)rtn = kvmppc_core_check_processor_compat();
}

struct kvm *kvm_arch_create_vm(void)
{
	struct kvm *kvm;

	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	if (!kvm)
		return ERR_PTR(-ENOMEM);

	return kvm;
}

static void kvmppc_free_vcpus(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);
	mutex_unlock(&kvm->lock);
}

void kvm_arch_sync_events(struct kvm *kvm)
{
}

void kvm_arch_destroy_vm(struct kvm *kvm)
{
	kvmppc_free_vcpus(kvm);
	kvm_free_physmem(kvm);
	cleanup_srcu_struct(&kvm->srcu);
	kfree(kvm);
}

int kvm_dev_ioctl_check_extension(long ext)
{
	int r;

	switch (ext) {
	case KVM_CAP_PPC_SEGSTATE:
	case KVM_CAP_PPC_PAIRED_SINGLES:
	case KVM_CAP_PPC_UNSET_IRQ:
	case KVM_CAP_ENABLE_CAP:
	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;
	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 0;
}

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


void kvm_arch_flush_shadow(struct kvm *kvm)
{
}

struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id)
{
	struct kvm_vcpu *vcpu;
	vcpu = kvmppc_core_vcpu_create(kvm, id);
	if (!IS_ERR(vcpu))
		kvmppc_create_vcpu_debugfs(vcpu, id);
	return vcpu;
}

void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
{
	/* Make sure we're not using the vcpu anymore */
	hrtimer_cancel(&vcpu->arch.dec_timer);
	tasklet_kill(&vcpu->arch.tasklet);

	kvmppc_remove_vcpu_debugfs(vcpu);
	kvmppc_core_vcpu_free(vcpu);
}

void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
{
	kvm_arch_vcpu_free(vcpu);
}

int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
{
	return kvmppc_core_pending_dec(vcpu);
}

static void kvmppc_decrementer_func(unsigned long data)
{
	struct kvm_vcpu *vcpu = (struct kvm_vcpu *)data;

	kvmppc_core_queue_dec(vcpu);

	if (waitqueue_active(&vcpu->wq)) {
		wake_up_interruptible(&vcpu->wq);
		vcpu->stat.halt_wakeup++;
	}
}

/*
 * low level hrtimer wake routine. Because this runs in hardirq context
 * we schedule a tasklet to do the real work.
 */
enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
{
	struct kvm_vcpu *vcpu;

	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	tasklet_schedule(&vcpu->arch.tasklet);

	return HRTIMER_NORESTART;
}

int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
{
	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;

	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)
{
	kvmppc_core_vcpu_load(vcpu, cpu);
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
	kvmppc_core_vcpu_put(vcpu);
}

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;
	}

	kvmppc_core_deliver_interrupts(vcpu);

	local_irq_disable();
	kvm_guest_enter();
	r = __kvmppc_vcpu_run(run, vcpu);
	kvm_guest_exit();
	local_irq_enable();

	if (vcpu->sigset_active)
		sigprocmask(SIG_SETMASK, &sigsaved, NULL);

	return r;
}

int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu, struct kvm_interrupt *irq)
{
	if (irq->irq == KVM_INTERRUPT_UNSET)
		kvmppc_core_dequeue_external(vcpu, irq);
	else
		kvmppc_core_queue_external(vcpu, irq);

	if (waitqueue_active(&vcpu->wq)) {
		wake_up_interruptible(&vcpu->wq);
		vcpu->stat.halt_wakeup++;
	}

	return 0;
}

static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
				     struct kvm_enable_cap *cap)
{
	int r;

	if (cap->flags)
		return -EINVAL;

	switch (cap->cap) {
	case KVM_CAP_PPC_OSI:
		r = 0;
		vcpu->arch.osi_enabled = true;
		break;
	default:
		r = -EINVAL;
		break;
	}

	return r;
}

int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
{
	return -EINVAL;
}

int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
                                    struct kvm_mp_state *mp_state)
{
	return -EINVAL;
}

long kvm_arch_vcpu_ioctl(struct file *filp,
                         unsigned int ioctl, unsigned long arg)
{
	struct kvm_vcpu *vcpu = filp->private_data;
	void __user *argp = (void __user *)arg;
	long r;

	switch (ioctl) {
	case KVM_INTERRUPT: {
		struct kvm_interrupt irq;
		r = -EFAULT;
		if (copy_from_user(&irq, argp, sizeof(irq)))
			goto out;
		r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
		goto out;
	}

	case KVM_ENABLE_CAP:
	{
		struct kvm_enable_cap cap;
		r = -EFAULT;
		if (copy_from_user(&cap, argp, sizeof(cap)))
			goto out;
		r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
		break;
	}
	default:
		r = -EINVAL;
	}

out:
	return r;
}

static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
{
	u32 inst_lis = 0x3c000000;
	u32 inst_ori = 0x60000000;
	u32 inst_nop = 0x60000000;
	u32 inst_sc = 0x44000002;
	u32 inst_imm_mask = 0xffff;

	/*
	 * The hypercall to get into KVM from within guest context is as
	 * follows:
	 *
	 *    lis r0, r0, KVM_SC_MAGIC_R0@h
	 *    ori r0, KVM_SC_MAGIC_R0@l
	 *    sc
	 *    nop
	 */
	pvinfo->hcall[0] = inst_lis | ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	pvinfo->hcall[1] = inst_ori | (KVM_SC_MAGIC_R0 & inst_imm_mask);
	pvinfo->hcall[2] = inst_sc;
	pvinfo->hcall[3] = inst_nop;

	return 0;
}

long kvm_arch_vm_ioctl(struct file *filp,
                       unsigned int ioctl, unsigned long arg)
{
	void __user *argp = (void __user *)arg;
	long r;

	switch (ioctl) {
	case KVM_PPC_GET_PVINFO: {
		struct kvm_ppc_pvinfo pvinfo;
		r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
		if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
			r = -EFAULT;
			goto out;
		}

		break;
	}
	default:
		r = -ENOTTY;
	}

out:
	return r;
}

int kvm_arch_init(void *opaque)
{
	return 0;
}

void kvm_arch_exit(void)
{
}
Commit	Line	Data
bbf45ba5 HB	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright IBM Corp. 2007
	16	*
	17	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	18	* Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
	19	*/
	20
	21	#include <linux/errno.h>
	22	#include <linux/err.h>
	23	#include <linux/kvm_host.h>
	24	#include <linux/module.h>
	25	#include <linux/vmalloc.h>
544c6761	26	#include <linux/hrtimer.h>
bbf45ba5	27	#include <linux/fs.h>
5a0e3ad6	28	#include <linux/slab.h>
bbf45ba5 HB	29	#include <asm/cputable.h>
	30	#include <asm/uaccess.h>
	31	#include <asm/kvm_ppc.h>
83aae4a8	32	#include <asm/tlbflush.h>
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;
5fc87407 AG	76	#if defined(CONFIG_PPC_BOOK3S) /* XXX Missing magic page on BookE */
	77	r2 \|= (1 << KVM_FEATURE_MAGIC_PAGE);
	78	#endif
2a342ed5 AG	79
2a342ed5 AG	80	/* Second return value is in r4 */
2a342ed5 AG	81	break;
	82	default:
	83	r = HC_EV_UNIMPLEMENTED;
	84	break;
	85	}
	86
7508e16c AG	87	kvmppc_set_gpr(vcpu, 4, r2);
7508e16c AG	88
2a342ed5 AG	89	return r;
2a342ed5 AG	90	}
bbf45ba5 HB	91
	92	int kvmppc_emulate_mmio(struct kvm_run run, struct kvm_vcpu vcpu)
	93	{
	94	enum emulation_result er;
	95	int r;
	96
	97	er = kvmppc_emulate_instruction(run, vcpu);
	98	switch (er) {
	99	case EMULATE_DONE:
	100	/* Future optimization: only reload non-volatiles if they were
	101	* actually modified. */
	102	r = RESUME_GUEST_NV;
	103	break;
	104	case EMULATE_DO_MMIO:
	105	run->exit_reason = KVM_EXIT_MMIO;
	106	/* We must reload nonvolatiles because "update" load/store
	107	* instructions modify register state. */
	108	/* Future optimization: only reload non-volatiles if they were
	109	* actually modified. */
	110	r = RESUME_HOST_NV;
	111	break;
	112	case EMULATE_FAIL:
	113	/* XXX Deliver Program interrupt to guest. */
	114	printk(KERN_EMERG "%s: emulation failed (%08x)\n", __func__,
c7f38f46	115	kvmppc_get_last_inst(vcpu));
bbf45ba5 HB	116	r = RESUME_HOST;
	117	break;
	118	default:
	119	BUG();
	120	}
	121
	122	return r;
	123	}
	124
10474ae8	125	int kvm_arch_hardware_enable(void *garbage)
bbf45ba5	126	{
10474ae8	127	return 0;
bbf45ba5 HB	128	}
	129
	130	void kvm_arch_hardware_disable(void *garbage)
	131	{
	132	}
	133
	134	int kvm_arch_hardware_setup(void)
	135	{
	136	return 0;
	137	}
	138
	139	void kvm_arch_hardware_unsetup(void)
	140	{
	141	}
	142
	143	void kvm_arch_check_processor_compat(void *rtn)
	144	{
9dd921cf	145	(int )rtn = kvmppc_core_check_processor_compat();
bbf45ba5 HB	146	}
	147
	148	struct kvm *kvm_arch_create_vm(void)
	149	{
	150	struct kvm *kvm;
	151
	152	kvm = kzalloc(sizeof(struct kvm), GFP_KERNEL);
	153	if (!kvm)
	154	return ERR_PTR(-ENOMEM);
	155
	156	return kvm;
	157	}
	158
	159	static void kvmppc_free_vcpus(struct kvm *kvm)
	160	{
	161	unsigned int i;
988a2cae	162	struct kvm_vcpu *vcpu;
bbf45ba5	163
988a2cae GN	164	kvm_for_each_vcpu(i, vcpu, kvm)
	165	kvm_arch_vcpu_free(vcpu);
	166
	167	mutex_lock(&kvm->lock);
	168	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	169	kvm->vcpus[i] = NULL;
	170
	171	atomic_set(&kvm->online_vcpus, 0);
	172	mutex_unlock(&kvm->lock);
bbf45ba5 HB	173	}
bbf45ba5 HB	174
ad8ba2cd SY	175	void kvm_arch_sync_events(struct kvm *kvm)
	176	{
	177	}
	178
bbf45ba5 HB	179	void kvm_arch_destroy_vm(struct kvm *kvm)
	180	{
	181	kvmppc_free_vcpus(kvm);
	182	kvm_free_physmem(kvm);
64749204	183	cleanup_srcu_struct(&kvm->srcu);
bbf45ba5 HB	184	kfree(kvm);
	185	}
	186
	187	int kvm_dev_ioctl_check_extension(long ext)
	188	{
	189	int r;
	190
	191	switch (ext) {
e15a1137	192	case KVM_CAP_PPC_SEGSTATE:
c10207fe	193	case KVM_CAP_PPC_PAIRED_SINGLES:
18978768	194	case KVM_CAP_PPC_UNSET_IRQ:
71fbfd5f	195	case KVM_CAP_ENABLE_CAP:
ad0a048b	196	case KVM_CAP_PPC_OSI:
15711e9c	197	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	198	r = 1;
e15a1137 AG	199	break;
588968b6 LV	200	case KVM_CAP_COALESCED_MMIO:
	201	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	202	break;
bbf45ba5 HB	203	default:
	204	r = 0;
	205	break;
	206	}
	207	return r;
	208
	209	}
	210
	211	long kvm_arch_dev_ioctl(struct file *filp,
	212	unsigned int ioctl, unsigned long arg)
	213	{
	214	return -EINVAL;
	215	}
	216
f7784b8e MT	217	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	218	struct kvm_memory_slot *memslot,
	219	struct kvm_memory_slot old,
	220	struct kvm_userspace_memory_region *mem,
	221	int user_alloc)
bbf45ba5 HB	222	{
	223	return 0;
	224	}
	225
f7784b8e MT	226	void kvm_arch_commit_memory_region(struct kvm *kvm,
	227	struct kvm_userspace_memory_region *mem,
	228	struct kvm_memory_slot old,
	229	int user_alloc)
	230	{
	231	return;
	232	}
	233
	234
34d4cb8f MT	235	void kvm_arch_flush_shadow(struct kvm *kvm)
	236	{
	237	}
	238
bbf45ba5 HB	239	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	240	{
73e75b41 HB	241	struct kvm_vcpu *vcpu;
73e75b41 HB	242	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	243	if (!IS_ERR(vcpu))
06056bfb WY	244	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	245	return vcpu;
bbf45ba5 HB	246	}
	247
	248	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	249	{
a595405d AG	250	/* Make sure we're not using the vcpu anymore */
	251	hrtimer_cancel(&vcpu->arch.dec_timer);
	252	tasklet_kill(&vcpu->arch.tasklet);
	253
73e75b41	254	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	255	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	256	}
	257
	258	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	259	{
	260	kvm_arch_vcpu_free(vcpu);
	261	}
	262
	263	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	264	{
9dd921cf	265	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	266	}
	267
	268	static void kvmppc_decrementer_func(unsigned long data)
	269	{
	270	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	271
9dd921cf	272	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	273
	274	if (waitqueue_active(&vcpu->wq)) {
	275	wake_up_interruptible(&vcpu->wq);
	276	vcpu->stat.halt_wakeup++;
	277	}
bbf45ba5 HB	278	}
bbf45ba5 HB	279
544c6761 AG	280	/*
	281	* low level hrtimer wake routine. Because this runs in hardirq context
	282	* we schedule a tasklet to do the real work.
	283	*/
	284	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	285	{
	286	struct kvm_vcpu *vcpu;
	287
	288	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	289	tasklet_schedule(&vcpu->arch.tasklet);
	290
	291	return HRTIMER_NORESTART;
	292	}
	293
bbf45ba5 HB	294	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	295	{
544c6761 AG	296	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	297	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	298	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5 HB	299
	300	return 0;
	301	}
	302
	303	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	304	{
ecc0981f	305	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	306	}
	307
	308	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	309	{
9dd921cf	310	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	311	}
	312
	313	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	314	{
9dd921cf	315	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	316	}
bbf45ba5 HB	317
d0bfb940	318	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	319	struct kvm_guest_debug *dbg)
bbf45ba5	320	{
f5d0906b	321	return -EINVAL;
bbf45ba5 HB	322	}
	323
	324	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	325	struct kvm_run *run)
	326	{
8e5b26b5	327	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	328	}
	329
	330	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	331	struct kvm_run *run)
	332	{
69b61833	333	u64 uninitialized_var(gpr);
bbf45ba5	334
8e5b26b5	335	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	336	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	337	return;
	338	}
	339
	340	if (vcpu->arch.mmio_is_bigendian) {
	341	switch (run->mmio.len) {
b104d066	342	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	343	case 4: gpr = (u32 )run->mmio.data; break;
	344	case 2: gpr = (u16 )run->mmio.data; break;
	345	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	346	}
	347	} else {
	348	/* Convert BE data from userland back to LE. */
	349	switch (run->mmio.len) {
8e5b26b5 AG	350	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	351	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	352	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	353	}
bbf45ba5 HB	354	}
8e5b26b5	355
3587d534 AG	356	if (vcpu->arch.mmio_sign_extend) {
	357	switch (run->mmio.len) {
	358	#ifdef CONFIG_PPC64
	359	case 4:
	360	gpr = (s64)(s32)gpr;
	361	break;
	362	#endif
	363	case 2:
	364	gpr = (s64)(s16)gpr;
	365	break;
	366	case 1:
	367	gpr = (s64)(s8)gpr;
	368	break;
	369	}
	370	}
	371
8e5b26b5	372	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	373
	374	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	375	case KVM_REG_GPR:
	376	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	377	break;
	378	case KVM_REG_FPR:
	379	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	380	break;
287d5611	381	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	382	case KVM_REG_QPR:
	383	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	384	break;
	385	case KVM_REG_FQPR:
	386	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	387	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	388	break;
287d5611	389	#endif
b104d066 AG	390	default:
	391	BUG();
	392	}
bbf45ba5 HB	393	}
	394
	395	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	396	unsigned int rt, unsigned int bytes, int is_bigendian)
	397	{
	398	if (bytes > sizeof(run->mmio.data)) {
	399	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	400	run->mmio.len);
	401	}
	402
	403	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	404	run->mmio.len = bytes;
	405	run->mmio.is_write = 0;
	406
	407	vcpu->arch.io_gpr = rt;
	408	vcpu->arch.mmio_is_bigendian = is_bigendian;
	409	vcpu->mmio_needed = 1;
	410	vcpu->mmio_is_write = 0;
3587d534	411	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	412
	413	return EMULATE_DO_MMIO;
	414	}
	415
3587d534 AG	416	/* Same as above, but sign extends */
	417	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	418	unsigned int rt, unsigned int bytes, int is_bigendian)
	419	{
	420	int r;
	421
	422	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	423	vcpu->arch.mmio_sign_extend = 1;
	424
	425	return r;
	426	}
	427
bbf45ba5	428	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	429	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	430	{
	431	void *data = run->mmio.data;
	432
	433	if (bytes > sizeof(run->mmio.data)) {
	434	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	435	run->mmio.len);
	436	}
	437
	438	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	439	run->mmio.len = bytes;
	440	run->mmio.is_write = 1;
	441	vcpu->mmio_needed = 1;
	442	vcpu->mmio_is_write = 1;
	443
	444	/* Store the value at the lowest bytes in 'data'. */
	445	if (is_bigendian) {
	446	switch (bytes) {
b104d066	447	case 8: (u64 )data = val; break;
bbf45ba5 HB	448	case 4: (u32 )data = val; break;
	449	case 2: (u16 )data = val; break;
	450	case 1: (u8 )data = val; break;
	451	}
	452	} else {
	453	/* Store LE value into 'data'. */
	454	switch (bytes) {
	455	case 4: st_le32(data, val); break;
	456	case 2: st_le16(data, val); break;
	457	case 1: (u8 )data = val; break;
	458	}
	459	}
	460
	461	return EMULATE_DO_MMIO;
	462	}
	463
	464	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	465	{
	466	int r;
	467	sigset_t sigsaved;
	468
	469	if (vcpu->sigset_active)
	470	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	471
	472	if (vcpu->mmio_needed) {
	473	if (!vcpu->mmio_is_write)
	474	kvmppc_complete_mmio_load(vcpu, run);
	475	vcpu->mmio_needed = 0;
	476	} else if (vcpu->arch.dcr_needed) {
	477	if (!vcpu->arch.dcr_is_write)
	478	kvmppc_complete_dcr_load(vcpu, run);
	479	vcpu->arch.dcr_needed = 0;
ad0a048b AG	480	} else if (vcpu->arch.osi_needed) {
	481	u64 *gprs = run->osi.gprs;
	482	int i;
	483
	484	for (i = 0; i < 32; i++)
	485	kvmppc_set_gpr(vcpu, i, gprs[i]);
	486	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	487	}
bbf45ba5 HB	488
9dd921cf	489	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	490
	491	local_irq_disable();
	492	kvm_guest_enter();
	493	r = __kvmppc_vcpu_run(run, vcpu);
	494	kvm_guest_exit();
	495	local_irq_enable();
	496
	497	if (vcpu->sigset_active)
	498	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	499
	500	return r;
	501	}
	502
	503	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	504	{
18978768 AG	505	if (irq->irq == KVM_INTERRUPT_UNSET)
	506	kvmppc_core_dequeue_external(vcpu, irq);
	507	else
	508	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	509
	510	if (waitqueue_active(&vcpu->wq)) {
	511	wake_up_interruptible(&vcpu->wq);
	512	vcpu->stat.halt_wakeup++;
	513	}
	514
bbf45ba5 HB	515	return 0;
	516	}
	517
71fbfd5f AG	518	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	519	struct kvm_enable_cap *cap)
	520	{
	521	int r;
	522
	523	if (cap->flags)
	524	return -EINVAL;
	525
	526	switch (cap->cap) {
ad0a048b AG	527	case KVM_CAP_PPC_OSI:
	528	r = 0;
	529	vcpu->arch.osi_enabled = true;
	530	break;
71fbfd5f AG	531	default:
	532	r = -EINVAL;
	533	break;
	534	}
	535
	536	return r;
	537	}
	538
bbf45ba5 HB	539	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	540	struct kvm_mp_state *mp_state)
	541	{
	542	return -EINVAL;
	543	}
	544
	545	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	546	struct kvm_mp_state *mp_state)
	547	{
	548	return -EINVAL;
	549	}
	550
	551	long kvm_arch_vcpu_ioctl(struct file *filp,
	552	unsigned int ioctl, unsigned long arg)
	553	{
	554	struct kvm_vcpu *vcpu = filp->private_data;
	555	void __user argp = (void __user )arg;
	556	long r;
	557
93736624 AK	558	switch (ioctl) {
93736624 AK	559	case KVM_INTERRUPT: {
bbf45ba5 HB	560	struct kvm_interrupt irq;
	561	r = -EFAULT;
	562	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	563	goto out;
bbf45ba5	564	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	565	goto out;
bbf45ba5	566	}
19483d14	567
71fbfd5f AG	568	case KVM_ENABLE_CAP:
	569	{
	570	struct kvm_enable_cap cap;
	571	r = -EFAULT;
	572	if (copy_from_user(&cap, argp, sizeof(cap)))
	573	goto out;
	574	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	575	break;
	576	}
bbf45ba5 HB	577	default:
	578	r = -EINVAL;
	579	}
	580
	581	out:
	582	return r;
	583	}
	584
15711e9c AG	585	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	586	{
	587	u32 inst_lis = 0x3c000000;
	588	u32 inst_ori = 0x60000000;
	589	u32 inst_nop = 0x60000000;
	590	u32 inst_sc = 0x44000002;
	591	u32 inst_imm_mask = 0xffff;
	592
	593	/*
	594	* The hypercall to get into KVM from within guest context is as
	595	* follows:
	596	*
	597	* lis r0, r0, KVM_SC_MAGIC_R0@h
	598	* ori r0, KVM_SC_MAGIC_R0@l
	599	* sc
	600	* nop
	601	*/
	602	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	603	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	604	pvinfo->hcall[2] = inst_sc;
	605	pvinfo->hcall[3] = inst_nop;
	606
	607	return 0;
	608	}
	609
bbf45ba5 HB	610	long kvm_arch_vm_ioctl(struct file *filp,
	611	unsigned int ioctl, unsigned long arg)
	612	{
15711e9c	613	void __user argp = (void __user )arg;
bbf45ba5 HB	614	long r;
	615
	616	switch (ioctl) {
15711e9c AG	617	case KVM_PPC_GET_PVINFO: {
	618	struct kvm_ppc_pvinfo pvinfo;
	619	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	620	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	621	r = -EFAULT;
	622	goto out;
	623	}
	624
	625	break;
	626	}
bbf45ba5	627	default:
367e1319	628	r = -ENOTTY;
bbf45ba5 HB	629	}
bbf45ba5 HB	630
15711e9c	631	out:
bbf45ba5 HB	632	return r;
	633	}
	634
	635	int kvm_arch_init(void *opaque)
	636	{
	637	return 0;
	638	}
	639
	640	void kvm_arch_exit(void)
	641	{
	642	}