[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();
}

int kvm_arch_init_vm(struct kvm *kvm)
{
	return 0;
}

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);
	mutex_unlock(&kvm->lock);
}

void kvm_arch_sync_events(struct kvm *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_PPC_IRQ_LEVEL:
	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;

#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)
{
	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;
		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;
	}
	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	}
bbf45ba5 HB	147
d89f5eff	148	int kvm_arch_init_vm(struct kvm *kvm)
bbf45ba5	149	{
d89f5eff	150	return 0;
bbf45ba5 HB	151	}
bbf45ba5 HB	152
d89f5eff	153	void kvm_arch_destroy_vm(struct kvm *kvm)
bbf45ba5 HB	154	{
bbf45ba5 HB	155	unsigned int i;
988a2cae	156	struct kvm_vcpu *vcpu;
bbf45ba5	157
988a2cae GN	158	kvm_for_each_vcpu(i, vcpu, kvm)
	159	kvm_arch_vcpu_free(vcpu);
	160
	161	mutex_lock(&kvm->lock);
	162	for (i = 0; i < atomic_read(&kvm->online_vcpus); i++)
	163	kvm->vcpus[i] = NULL;
	164
	165	atomic_set(&kvm->online_vcpus, 0);
	166	mutex_unlock(&kvm->lock);
bbf45ba5 HB	167	}
bbf45ba5 HB	168
ad8ba2cd SY	169	void kvm_arch_sync_events(struct kvm *kvm)
	170	{
	171	}
	172
bbf45ba5 HB	173	int kvm_dev_ioctl_check_extension(long ext)
	174	{
	175	int r;
	176
	177	switch (ext) {
e15a1137	178	case KVM_CAP_PPC_SEGSTATE:
c10207fe	179	case KVM_CAP_PPC_PAIRED_SINGLES:
18978768	180	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	181	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	182	case KVM_CAP_ENABLE_CAP:
ad0a048b	183	case KVM_CAP_PPC_OSI:
15711e9c	184	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	185	r = 1;
e15a1137 AG	186	break;
588968b6 LV	187	case KVM_CAP_COALESCED_MMIO:
	188	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	189	break;
bbf45ba5 HB	190	default:
	191	r = 0;
	192	break;
	193	}
	194	return r;
	195
	196	}
	197
	198	long kvm_arch_dev_ioctl(struct file *filp,
	199	unsigned int ioctl, unsigned long arg)
	200	{
	201	return -EINVAL;
	202	}
	203
f7784b8e MT	204	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	205	struct kvm_memory_slot *memslot,
	206	struct kvm_memory_slot old,
	207	struct kvm_userspace_memory_region *mem,
	208	int user_alloc)
bbf45ba5 HB	209	{
	210	return 0;
	211	}
	212
f7784b8e MT	213	void kvm_arch_commit_memory_region(struct kvm *kvm,
	214	struct kvm_userspace_memory_region *mem,
	215	struct kvm_memory_slot old,
	216	int user_alloc)
	217	{
	218	return;
	219	}
	220
	221
34d4cb8f MT	222	void kvm_arch_flush_shadow(struct kvm *kvm)
	223	{
	224	}
	225
bbf45ba5 HB	226	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	227	{
73e75b41 HB	228	struct kvm_vcpu *vcpu;
73e75b41 HB	229	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	230	if (!IS_ERR(vcpu))
06056bfb WY	231	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	232	return vcpu;
bbf45ba5 HB	233	}
	234
	235	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	236	{
a595405d AG	237	/* Make sure we're not using the vcpu anymore */
	238	hrtimer_cancel(&vcpu->arch.dec_timer);
	239	tasklet_kill(&vcpu->arch.tasklet);
	240
73e75b41	241	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	242	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	243	}
	244
	245	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	246	{
	247	kvm_arch_vcpu_free(vcpu);
	248	}
	249
	250	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	251	{
9dd921cf	252	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	253	}
	254
	255	static void kvmppc_decrementer_func(unsigned long data)
	256	{
	257	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	258
9dd921cf	259	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	260
	261	if (waitqueue_active(&vcpu->wq)) {
	262	wake_up_interruptible(&vcpu->wq);
	263	vcpu->stat.halt_wakeup++;
	264	}
bbf45ba5 HB	265	}
bbf45ba5 HB	266
544c6761 AG	267	/*
	268	* low level hrtimer wake routine. Because this runs in hardirq context
	269	* we schedule a tasklet to do the real work.
	270	*/
	271	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	272	{
	273	struct kvm_vcpu *vcpu;
	274
	275	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	276	tasklet_schedule(&vcpu->arch.tasklet);
	277
	278	return HRTIMER_NORESTART;
	279	}
	280
bbf45ba5 HB	281	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	282	{
544c6761 AG	283	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	284	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	285	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5	286
09000adb BB	287	#ifdef CONFIG_KVM_EXIT_TIMING
	288	mutex_init(&vcpu->arch.exit_timing_lock);
	289	#endif
	290
bbf45ba5 HB	291	return 0;
	292	}
	293
	294	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	295	{
ecc0981f	296	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	297	}
	298
	299	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	300	{
9dd921cf	301	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	302	}
	303
	304	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	305	{
9dd921cf	306	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	307	}
bbf45ba5 HB	308
d0bfb940	309	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	310	struct kvm_guest_debug *dbg)
bbf45ba5	311	{
f5d0906b	312	return -EINVAL;
bbf45ba5 HB	313	}
	314
	315	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	316	struct kvm_run *run)
	317	{
8e5b26b5	318	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	319	}
	320
	321	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	322	struct kvm_run *run)
	323	{
69b61833	324	u64 uninitialized_var(gpr);
bbf45ba5	325
8e5b26b5	326	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	327	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	328	return;
	329	}
	330
	331	if (vcpu->arch.mmio_is_bigendian) {
	332	switch (run->mmio.len) {
b104d066	333	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	334	case 4: gpr = (u32 )run->mmio.data; break;
	335	case 2: gpr = (u16 )run->mmio.data; break;
	336	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	337	}
	338	} else {
	339	/* Convert BE data from userland back to LE. */
	340	switch (run->mmio.len) {
8e5b26b5 AG	341	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	342	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	343	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	344	}
bbf45ba5 HB	345	}
8e5b26b5	346
3587d534 AG	347	if (vcpu->arch.mmio_sign_extend) {
	348	switch (run->mmio.len) {
	349	#ifdef CONFIG_PPC64
	350	case 4:
	351	gpr = (s64)(s32)gpr;
	352	break;
	353	#endif
	354	case 2:
	355	gpr = (s64)(s16)gpr;
	356	break;
	357	case 1:
	358	gpr = (s64)(s8)gpr;
	359	break;
	360	}
	361	}
	362
8e5b26b5	363	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	364
	365	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	366	case KVM_REG_GPR:
	367	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	368	break;
	369	case KVM_REG_FPR:
	370	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	371	break;
287d5611	372	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	373	case KVM_REG_QPR:
	374	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	375	break;
	376	case KVM_REG_FQPR:
	377	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	378	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	379	break;
287d5611	380	#endif
b104d066 AG	381	default:
	382	BUG();
	383	}
bbf45ba5 HB	384	}
	385
	386	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	387	unsigned int rt, unsigned int bytes, int is_bigendian)
	388	{
	389	if (bytes > sizeof(run->mmio.data)) {
	390	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	391	run->mmio.len);
	392	}
	393
	394	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	395	run->mmio.len = bytes;
	396	run->mmio.is_write = 0;
	397
	398	vcpu->arch.io_gpr = rt;
	399	vcpu->arch.mmio_is_bigendian = is_bigendian;
	400	vcpu->mmio_needed = 1;
	401	vcpu->mmio_is_write = 0;
3587d534	402	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	403
	404	return EMULATE_DO_MMIO;
	405	}
	406
3587d534 AG	407	/* Same as above, but sign extends */
	408	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	409	unsigned int rt, unsigned int bytes, int is_bigendian)
	410	{
	411	int r;
	412
	413	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	414	vcpu->arch.mmio_sign_extend = 1;
	415
	416	return r;
	417	}
	418
bbf45ba5	419	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	420	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	421	{
	422	void *data = run->mmio.data;
	423
	424	if (bytes > sizeof(run->mmio.data)) {
	425	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	426	run->mmio.len);
	427	}
	428
	429	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	430	run->mmio.len = bytes;
	431	run->mmio.is_write = 1;
	432	vcpu->mmio_needed = 1;
	433	vcpu->mmio_is_write = 1;
	434
	435	/* Store the value at the lowest bytes in 'data'. */
	436	if (is_bigendian) {
	437	switch (bytes) {
b104d066	438	case 8: (u64 )data = val; break;
bbf45ba5 HB	439	case 4: (u32 )data = val; break;
	440	case 2: (u16 )data = val; break;
	441	case 1: (u8 )data = val; break;
	442	}
	443	} else {
	444	/* Store LE value into 'data'. */
	445	switch (bytes) {
	446	case 4: st_le32(data, val); break;
	447	case 2: st_le16(data, val); break;
	448	case 1: (u8 )data = val; break;
	449	}
	450	}
	451
	452	return EMULATE_DO_MMIO;
	453	}
	454
	455	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	456	{
	457	int r;
	458	sigset_t sigsaved;
	459
	460	if (vcpu->sigset_active)
	461	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	462
	463	if (vcpu->mmio_needed) {
	464	if (!vcpu->mmio_is_write)
	465	kvmppc_complete_mmio_load(vcpu, run);
	466	vcpu->mmio_needed = 0;
	467	} else if (vcpu->arch.dcr_needed) {
	468	if (!vcpu->arch.dcr_is_write)
	469	kvmppc_complete_dcr_load(vcpu, run);
	470	vcpu->arch.dcr_needed = 0;
ad0a048b AG	471	} else if (vcpu->arch.osi_needed) {
	472	u64 *gprs = run->osi.gprs;
	473	int i;
	474
	475	for (i = 0; i < 32; i++)
	476	kvmppc_set_gpr(vcpu, i, gprs[i]);
	477	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	478	}
bbf45ba5 HB	479
9dd921cf	480	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	481
	482	local_irq_disable();
	483	kvm_guest_enter();
	484	r = __kvmppc_vcpu_run(run, vcpu);
	485	kvm_guest_exit();
	486	local_irq_enable();
	487
	488	if (vcpu->sigset_active)
	489	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	490
	491	return r;
	492	}
	493
	494	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	495	{
18978768 AG	496	if (irq->irq == KVM_INTERRUPT_UNSET)
	497	kvmppc_core_dequeue_external(vcpu, irq);
	498	else
	499	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	500
	501	if (waitqueue_active(&vcpu->wq)) {
	502	wake_up_interruptible(&vcpu->wq);
	503	vcpu->stat.halt_wakeup++;
	504	}
	505
bbf45ba5 HB	506	return 0;
	507	}
	508
71fbfd5f AG	509	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	510	struct kvm_enable_cap *cap)
	511	{
	512	int r;
	513
	514	if (cap->flags)
	515	return -EINVAL;
	516
	517	switch (cap->cap) {
ad0a048b AG	518	case KVM_CAP_PPC_OSI:
	519	r = 0;
	520	vcpu->arch.osi_enabled = true;
	521	break;
71fbfd5f AG	522	default:
	523	r = -EINVAL;
	524	break;
	525	}
	526
	527	return r;
	528	}
	529
bbf45ba5 HB	530	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	531	struct kvm_mp_state *mp_state)
	532	{
	533	return -EINVAL;
	534	}
	535
	536	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	537	struct kvm_mp_state *mp_state)
	538	{
	539	return -EINVAL;
	540	}
	541
	542	long kvm_arch_vcpu_ioctl(struct file *filp,
	543	unsigned int ioctl, unsigned long arg)
	544	{
	545	struct kvm_vcpu *vcpu = filp->private_data;
	546	void __user argp = (void __user )arg;
	547	long r;
	548
93736624 AK	549	switch (ioctl) {
93736624 AK	550	case KVM_INTERRUPT: {
bbf45ba5 HB	551	struct kvm_interrupt irq;
	552	r = -EFAULT;
	553	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	554	goto out;
bbf45ba5	555	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	556	goto out;
bbf45ba5	557	}
19483d14	558
71fbfd5f AG	559	case KVM_ENABLE_CAP:
	560	{
	561	struct kvm_enable_cap cap;
	562	r = -EFAULT;
	563	if (copy_from_user(&cap, argp, sizeof(cap)))
	564	goto out;
	565	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	566	break;
	567	}
bbf45ba5 HB	568	default:
	569	r = -EINVAL;
	570	}
	571
	572	out:
	573	return r;
	574	}
	575
15711e9c AG	576	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	577	{
	578	u32 inst_lis = 0x3c000000;
	579	u32 inst_ori = 0x60000000;
	580	u32 inst_nop = 0x60000000;
	581	u32 inst_sc = 0x44000002;
	582	u32 inst_imm_mask = 0xffff;
	583
	584	/*
	585	* The hypercall to get into KVM from within guest context is as
	586	* follows:
	587	*
	588	* lis r0, r0, KVM_SC_MAGIC_R0@h
	589	* ori r0, KVM_SC_MAGIC_R0@l
	590	* sc
	591	* nop
	592	*/
	593	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	594	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	595	pvinfo->hcall[2] = inst_sc;
	596	pvinfo->hcall[3] = inst_nop;
	597
	598	return 0;
	599	}
	600
bbf45ba5 HB	601	long kvm_arch_vm_ioctl(struct file *filp,
	602	unsigned int ioctl, unsigned long arg)
	603	{
15711e9c	604	void __user argp = (void __user )arg;
bbf45ba5 HB	605	long r;
	606
	607	switch (ioctl) {
15711e9c AG	608	case KVM_PPC_GET_PVINFO: {
15711e9c AG	609	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	610	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	611	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	612	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	613	r = -EFAULT;
	614	goto out;
	615	}
	616
	617	break;
	618	}
bbf45ba5	619	default:
367e1319	620	r = -ENOTTY;
bbf45ba5 HB	621	}
bbf45ba5 HB	622
15711e9c	623	out:
bbf45ba5 HB	624	return r;
	625	}
	626
	627	int kvm_arch_init(void *opaque)
	628	{
	629	return 0;
	630	}
	631
	632	void kvm_arch_exit(void)
	633	{
	634	}