[GitHub/mt8127/android_kernel_alcatel_ttab.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;

	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 HB	286
	287	return 0;
	288	}
	289
	290	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	291	{
ecc0981f	292	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	293	}
	294
	295	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	296	{
9dd921cf	297	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	298	}
	299
	300	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	301	{
9dd921cf	302	kvmppc_core_vcpu_put(vcpu);
bbf45ba5 HB	303	}
bbf45ba5 HB	304
d0bfb940	305	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	306	struct kvm_guest_debug *dbg)
bbf45ba5	307	{
f5d0906b	308	return -EINVAL;
bbf45ba5 HB	309	}
	310
	311	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	312	struct kvm_run *run)
	313	{
8e5b26b5	314	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	315	}
	316
	317	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	318	struct kvm_run *run)
	319	{
69b61833	320	u64 uninitialized_var(gpr);
bbf45ba5	321
8e5b26b5	322	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	323	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	324	return;
	325	}
	326
	327	if (vcpu->arch.mmio_is_bigendian) {
	328	switch (run->mmio.len) {
b104d066	329	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	330	case 4: gpr = (u32 )run->mmio.data; break;
	331	case 2: gpr = (u16 )run->mmio.data; break;
	332	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	333	}
	334	} else {
	335	/* Convert BE data from userland back to LE. */
	336	switch (run->mmio.len) {
8e5b26b5 AG	337	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	338	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	339	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	340	}
bbf45ba5 HB	341	}
8e5b26b5	342
3587d534 AG	343	if (vcpu->arch.mmio_sign_extend) {
	344	switch (run->mmio.len) {
	345	#ifdef CONFIG_PPC64
	346	case 4:
	347	gpr = (s64)(s32)gpr;
	348	break;
	349	#endif
	350	case 2:
	351	gpr = (s64)(s16)gpr;
	352	break;
	353	case 1:
	354	gpr = (s64)(s8)gpr;
	355	break;
	356	}
	357	}
	358
8e5b26b5	359	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	360
	361	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	362	case KVM_REG_GPR:
	363	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	364	break;
	365	case KVM_REG_FPR:
	366	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	367	break;
287d5611	368	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	369	case KVM_REG_QPR:
	370	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	371	break;
	372	case KVM_REG_FQPR:
	373	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	374	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	375	break;
287d5611	376	#endif
b104d066 AG	377	default:
	378	BUG();
	379	}
bbf45ba5 HB	380	}
	381
	382	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	383	unsigned int rt, unsigned int bytes, int is_bigendian)
	384	{
	385	if (bytes > sizeof(run->mmio.data)) {
	386	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	387	run->mmio.len);
	388	}
	389
	390	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	391	run->mmio.len = bytes;
	392	run->mmio.is_write = 0;
	393
	394	vcpu->arch.io_gpr = rt;
	395	vcpu->arch.mmio_is_bigendian = is_bigendian;
	396	vcpu->mmio_needed = 1;
	397	vcpu->mmio_is_write = 0;
3587d534	398	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	399
	400	return EMULATE_DO_MMIO;
	401	}
	402
3587d534 AG	403	/* Same as above, but sign extends */
	404	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	405	unsigned int rt, unsigned int bytes, int is_bigendian)
	406	{
	407	int r;
	408
	409	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	410	vcpu->arch.mmio_sign_extend = 1;
	411
	412	return r;
	413	}
	414
bbf45ba5	415	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	416	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	417	{
	418	void *data = run->mmio.data;
	419
	420	if (bytes > sizeof(run->mmio.data)) {
	421	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	422	run->mmio.len);
	423	}
	424
	425	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	426	run->mmio.len = bytes;
	427	run->mmio.is_write = 1;
	428	vcpu->mmio_needed = 1;
	429	vcpu->mmio_is_write = 1;
	430
	431	/* Store the value at the lowest bytes in 'data'. */
	432	if (is_bigendian) {
	433	switch (bytes) {
b104d066	434	case 8: (u64 )data = val; break;
bbf45ba5 HB	435	case 4: (u32 )data = val; break;
	436	case 2: (u16 )data = val; break;
	437	case 1: (u8 )data = val; break;
	438	}
	439	} else {
	440	/* Store LE value into 'data'. */
	441	switch (bytes) {
	442	case 4: st_le32(data, val); break;
	443	case 2: st_le16(data, val); break;
	444	case 1: (u8 )data = val; break;
	445	}
	446	}
	447
	448	return EMULATE_DO_MMIO;
	449	}
	450
	451	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	452	{
	453	int r;
	454	sigset_t sigsaved;
	455
	456	if (vcpu->sigset_active)
	457	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	458
	459	if (vcpu->mmio_needed) {
	460	if (!vcpu->mmio_is_write)
	461	kvmppc_complete_mmio_load(vcpu, run);
	462	vcpu->mmio_needed = 0;
	463	} else if (vcpu->arch.dcr_needed) {
	464	if (!vcpu->arch.dcr_is_write)
	465	kvmppc_complete_dcr_load(vcpu, run);
	466	vcpu->arch.dcr_needed = 0;
ad0a048b AG	467	} else if (vcpu->arch.osi_needed) {
	468	u64 *gprs = run->osi.gprs;
	469	int i;
	470
	471	for (i = 0; i < 32; i++)
	472	kvmppc_set_gpr(vcpu, i, gprs[i]);
	473	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	474	}
bbf45ba5 HB	475
9dd921cf	476	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	477
	478	local_irq_disable();
	479	kvm_guest_enter();
	480	r = __kvmppc_vcpu_run(run, vcpu);
	481	kvm_guest_exit();
	482	local_irq_enable();
	483
	484	if (vcpu->sigset_active)
	485	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	486
	487	return r;
	488	}
	489
	490	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	491	{
18978768 AG	492	if (irq->irq == KVM_INTERRUPT_UNSET)
	493	kvmppc_core_dequeue_external(vcpu, irq);
	494	else
	495	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	496
	497	if (waitqueue_active(&vcpu->wq)) {
	498	wake_up_interruptible(&vcpu->wq);
	499	vcpu->stat.halt_wakeup++;
	500	}
	501
bbf45ba5 HB	502	return 0;
	503	}
	504
71fbfd5f AG	505	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	506	struct kvm_enable_cap *cap)
	507	{
	508	int r;
	509
	510	if (cap->flags)
	511	return -EINVAL;
	512
	513	switch (cap->cap) {
ad0a048b AG	514	case KVM_CAP_PPC_OSI:
	515	r = 0;
	516	vcpu->arch.osi_enabled = true;
	517	break;
71fbfd5f AG	518	default:
	519	r = -EINVAL;
	520	break;
	521	}
	522
	523	return r;
	524	}
	525
bbf45ba5 HB	526	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	527	struct kvm_mp_state *mp_state)
	528	{
	529	return -EINVAL;
	530	}
	531
	532	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	533	struct kvm_mp_state *mp_state)
	534	{
	535	return -EINVAL;
	536	}
	537
	538	long kvm_arch_vcpu_ioctl(struct file *filp,
	539	unsigned int ioctl, unsigned long arg)
	540	{
	541	struct kvm_vcpu *vcpu = filp->private_data;
	542	void __user argp = (void __user )arg;
	543	long r;
	544
93736624 AK	545	switch (ioctl) {
93736624 AK	546	case KVM_INTERRUPT: {
bbf45ba5 HB	547	struct kvm_interrupt irq;
	548	r = -EFAULT;
	549	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	550	goto out;
bbf45ba5	551	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	552	goto out;
bbf45ba5	553	}
19483d14	554
71fbfd5f AG	555	case KVM_ENABLE_CAP:
	556	{
	557	struct kvm_enable_cap cap;
	558	r = -EFAULT;
	559	if (copy_from_user(&cap, argp, sizeof(cap)))
	560	goto out;
	561	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	562	break;
	563	}
bbf45ba5 HB	564	default:
	565	r = -EINVAL;
	566	}
	567
	568	out:
	569	return r;
	570	}
	571
15711e9c AG	572	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	573	{
	574	u32 inst_lis = 0x3c000000;
	575	u32 inst_ori = 0x60000000;
	576	u32 inst_nop = 0x60000000;
	577	u32 inst_sc = 0x44000002;
	578	u32 inst_imm_mask = 0xffff;
	579
	580	/*
	581	* The hypercall to get into KVM from within guest context is as
	582	* follows:
	583	*
	584	* lis r0, r0, KVM_SC_MAGIC_R0@h
	585	* ori r0, KVM_SC_MAGIC_R0@l
	586	* sc
	587	* nop
	588	*/
	589	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	590	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	591	pvinfo->hcall[2] = inst_sc;
	592	pvinfo->hcall[3] = inst_nop;
	593
	594	return 0;
	595	}
	596
bbf45ba5 HB	597	long kvm_arch_vm_ioctl(struct file *filp,
	598	unsigned int ioctl, unsigned long arg)
	599	{
15711e9c	600	void __user argp = (void __user )arg;
bbf45ba5 HB	601	long r;
	602
	603	switch (ioctl) {
15711e9c AG	604	case KVM_PPC_GET_PVINFO: {
15711e9c AG	605	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	606	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	607	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	608	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	609	r = -EFAULT;
	610	goto out;
	611	}
	612
	613	break;
	614	}
bbf45ba5	615	default:
367e1319	616	r = -ENOTTY;
bbf45ba5 HB	617	}
bbf45ba5 HB	618
15711e9c	619	out:
bbf45ba5 HB	620	return r;
	621	}
	622
	623	int kvm_arch_init(void *opaque)
	624	{
	625	return 0;
	626	}
	627
	628	void kvm_arch_exit(void)
	629	{
	630	}