[mirror_ubuntu-artful-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) {
#ifdef CONFIG_BOOKE
	case KVM_CAP_PPC_BOOKE_SREGS:
#else
	case KVM_CAP_PPC_SEGSTATE:
#endif
	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)
{
#ifdef CONFIG_BOOKE
	/*
	 * vrsave (formerly usprg0) isn't used by Linux, but may
	 * be used by the guest.
	 *
	 * On non-booke this is associated with Altivec and
	 * is handled by code in book3s.c.
	 */
	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
#endif
	kvmppc_core_vcpu_load(vcpu, cpu);
}

void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
{
	kvmppc_core_vcpu_put(vcpu);
#ifdef CONFIG_BOOKE
	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
#endif
}

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) {
5ce941ee SW	178	#ifdef CONFIG_BOOKE
	179	case KVM_CAP_PPC_BOOKE_SREGS:
	180	#else
e15a1137	181	case KVM_CAP_PPC_SEGSTATE:
5ce941ee	182	#endif
c10207fe	183	case KVM_CAP_PPC_PAIRED_SINGLES:
18978768	184	case KVM_CAP_PPC_UNSET_IRQ:
7b4203e8	185	case KVM_CAP_PPC_IRQ_LEVEL:
71fbfd5f	186	case KVM_CAP_ENABLE_CAP:
ad0a048b	187	case KVM_CAP_PPC_OSI:
15711e9c	188	case KVM_CAP_PPC_GET_PVINFO:
e15a1137 AG	189	r = 1;
e15a1137 AG	190	break;
588968b6 LV	191	case KVM_CAP_COALESCED_MMIO:
	192	r = KVM_COALESCED_MMIO_PAGE_OFFSET;
	193	break;
bbf45ba5 HB	194	default:
	195	r = 0;
	196	break;
	197	}
	198	return r;
	199
	200	}
	201
	202	long kvm_arch_dev_ioctl(struct file *filp,
	203	unsigned int ioctl, unsigned long arg)
	204	{
	205	return -EINVAL;
	206	}
	207
f7784b8e MT	208	int kvm_arch_prepare_memory_region(struct kvm *kvm,
	209	struct kvm_memory_slot *memslot,
	210	struct kvm_memory_slot old,
	211	struct kvm_userspace_memory_region *mem,
	212	int user_alloc)
bbf45ba5 HB	213	{
	214	return 0;
	215	}
	216
f7784b8e MT	217	void kvm_arch_commit_memory_region(struct kvm *kvm,
	218	struct kvm_userspace_memory_region *mem,
	219	struct kvm_memory_slot old,
	220	int user_alloc)
	221	{
	222	return;
	223	}
	224
	225
34d4cb8f MT	226	void kvm_arch_flush_shadow(struct kvm *kvm)
	227	{
	228	}
	229
bbf45ba5 HB	230	struct kvm_vcpu kvm_arch_vcpu_create(struct kvm kvm, unsigned int id)
bbf45ba5 HB	231	{
73e75b41 HB	232	struct kvm_vcpu *vcpu;
73e75b41 HB	233	vcpu = kvmppc_core_vcpu_create(kvm, id);
06056bfb WY	234	if (!IS_ERR(vcpu))
06056bfb WY	235	kvmppc_create_vcpu_debugfs(vcpu, id);
73e75b41	236	return vcpu;
bbf45ba5 HB	237	}
	238
	239	void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
	240	{
a595405d AG	241	/* Make sure we're not using the vcpu anymore */
	242	hrtimer_cancel(&vcpu->arch.dec_timer);
	243	tasklet_kill(&vcpu->arch.tasklet);
	244
73e75b41	245	kvmppc_remove_vcpu_debugfs(vcpu);
db93f574	246	kvmppc_core_vcpu_free(vcpu);
bbf45ba5 HB	247	}
	248
	249	void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
	250	{
	251	kvm_arch_vcpu_free(vcpu);
	252	}
	253
	254	int kvm_cpu_has_pending_timer(struct kvm_vcpu *vcpu)
	255	{
9dd921cf	256	return kvmppc_core_pending_dec(vcpu);
bbf45ba5 HB	257	}
	258
	259	static void kvmppc_decrementer_func(unsigned long data)
	260	{
	261	struct kvm_vcpu vcpu = (struct kvm_vcpu )data;
	262
9dd921cf	263	kvmppc_core_queue_dec(vcpu);
45c5eb67 HB	264
	265	if (waitqueue_active(&vcpu->wq)) {
	266	wake_up_interruptible(&vcpu->wq);
	267	vcpu->stat.halt_wakeup++;
	268	}
bbf45ba5 HB	269	}
bbf45ba5 HB	270
544c6761 AG	271	/*
	272	* low level hrtimer wake routine. Because this runs in hardirq context
	273	* we schedule a tasklet to do the real work.
	274	*/
	275	enum hrtimer_restart kvmppc_decrementer_wakeup(struct hrtimer *timer)
	276	{
	277	struct kvm_vcpu *vcpu;
	278
	279	vcpu = container_of(timer, struct kvm_vcpu, arch.dec_timer);
	280	tasklet_schedule(&vcpu->arch.tasklet);
	281
	282	return HRTIMER_NORESTART;
	283	}
	284
bbf45ba5 HB	285	int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
bbf45ba5 HB	286	{
544c6761 AG	287	hrtimer_init(&vcpu->arch.dec_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
	288	tasklet_init(&vcpu->arch.tasklet, kvmppc_decrementer_func, (ulong)vcpu);
	289	vcpu->arch.dec_timer.function = kvmppc_decrementer_wakeup;
bbf45ba5	290
09000adb BB	291	#ifdef CONFIG_KVM_EXIT_TIMING
	292	mutex_init(&vcpu->arch.exit_timing_lock);
	293	#endif
	294
bbf45ba5 HB	295	return 0;
	296	}
	297
	298	void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
	299	{
ecc0981f	300	kvmppc_mmu_destroy(vcpu);
bbf45ba5 HB	301	}
	302
	303	void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
	304	{
eab17672 SW	305	#ifdef CONFIG_BOOKE
	306	/*
	307	* vrsave (formerly usprg0) isn't used by Linux, but may
	308	* be used by the guest.
	309	*
	310	* On non-booke this is associated with Altivec and
	311	* is handled by code in book3s.c.
	312	*/
	313	mtspr(SPRN_VRSAVE, vcpu->arch.vrsave);
	314	#endif
9dd921cf	315	kvmppc_core_vcpu_load(vcpu, cpu);
bbf45ba5 HB	316	}
	317
	318	void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
	319	{
9dd921cf	320	kvmppc_core_vcpu_put(vcpu);
eab17672 SW	321	#ifdef CONFIG_BOOKE
	322	vcpu->arch.vrsave = mfspr(SPRN_VRSAVE);
	323	#endif
bbf45ba5 HB	324	}
bbf45ba5 HB	325
d0bfb940	326	int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
f5d0906b	327	struct kvm_guest_debug *dbg)
bbf45ba5	328	{
f5d0906b	329	return -EINVAL;
bbf45ba5 HB	330	}
	331
	332	static void kvmppc_complete_dcr_load(struct kvm_vcpu *vcpu,
	333	struct kvm_run *run)
	334	{
8e5b26b5	335	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, run->dcr.data);
bbf45ba5 HB	336	}
	337
	338	static void kvmppc_complete_mmio_load(struct kvm_vcpu *vcpu,
	339	struct kvm_run *run)
	340	{
69b61833	341	u64 uninitialized_var(gpr);
bbf45ba5	342
8e5b26b5	343	if (run->mmio.len > sizeof(gpr)) {
bbf45ba5 HB	344	printk(KERN_ERR "bad MMIO length: %d\n", run->mmio.len);
	345	return;
	346	}
	347
	348	if (vcpu->arch.mmio_is_bigendian) {
	349	switch (run->mmio.len) {
b104d066	350	case 8: gpr = (u64 )run->mmio.data; break;
8e5b26b5 AG	351	case 4: gpr = (u32 )run->mmio.data; break;
	352	case 2: gpr = (u16 )run->mmio.data; break;
	353	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	354	}
	355	} else {
	356	/* Convert BE data from userland back to LE. */
	357	switch (run->mmio.len) {
8e5b26b5 AG	358	case 4: gpr = ld_le32((u32 *)run->mmio.data); break;
	359	case 2: gpr = ld_le16((u16 *)run->mmio.data); break;
	360	case 1: gpr = (u8 )run->mmio.data; break;
bbf45ba5 HB	361	}
bbf45ba5 HB	362	}
8e5b26b5	363
3587d534 AG	364	if (vcpu->arch.mmio_sign_extend) {
	365	switch (run->mmio.len) {
	366	#ifdef CONFIG_PPC64
	367	case 4:
	368	gpr = (s64)(s32)gpr;
	369	break;
	370	#endif
	371	case 2:
	372	gpr = (s64)(s16)gpr;
	373	break;
	374	case 1:
	375	gpr = (s64)(s8)gpr;
	376	break;
	377	}
	378	}
	379
8e5b26b5	380	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
b104d066 AG	381
	382	switch (vcpu->arch.io_gpr & KVM_REG_EXT_MASK) {
	383	case KVM_REG_GPR:
	384	kvmppc_set_gpr(vcpu, vcpu->arch.io_gpr, gpr);
	385	break;
	386	case KVM_REG_FPR:
	387	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	388	break;
287d5611	389	#ifdef CONFIG_PPC_BOOK3S
b104d066 AG	390	case KVM_REG_QPR:
	391	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	392	break;
	393	case KVM_REG_FQPR:
	394	vcpu->arch.fpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	395	vcpu->arch.qpr[vcpu->arch.io_gpr & KVM_REG_MASK] = gpr;
	396	break;
287d5611	397	#endif
b104d066 AG	398	default:
	399	BUG();
	400	}
bbf45ba5 HB	401	}
	402
	403	int kvmppc_handle_load(struct kvm_run run, struct kvm_vcpu vcpu,
	404	unsigned int rt, unsigned int bytes, int is_bigendian)
	405	{
	406	if (bytes > sizeof(run->mmio.data)) {
	407	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	408	run->mmio.len);
	409	}
	410
	411	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	412	run->mmio.len = bytes;
	413	run->mmio.is_write = 0;
	414
	415	vcpu->arch.io_gpr = rt;
	416	vcpu->arch.mmio_is_bigendian = is_bigendian;
	417	vcpu->mmio_needed = 1;
	418	vcpu->mmio_is_write = 0;
3587d534	419	vcpu->arch.mmio_sign_extend = 0;
bbf45ba5 HB	420
	421	return EMULATE_DO_MMIO;
	422	}
	423
3587d534 AG	424	/* Same as above, but sign extends */
	425	int kvmppc_handle_loads(struct kvm_run run, struct kvm_vcpu vcpu,
	426	unsigned int rt, unsigned int bytes, int is_bigendian)
	427	{
	428	int r;
	429
	430	r = kvmppc_handle_load(run, vcpu, rt, bytes, is_bigendian);
	431	vcpu->arch.mmio_sign_extend = 1;
	432
	433	return r;
	434	}
	435
bbf45ba5	436	int kvmppc_handle_store(struct kvm_run run, struct kvm_vcpu vcpu,
b104d066	437	u64 val, unsigned int bytes, int is_bigendian)
bbf45ba5 HB	438	{
	439	void *data = run->mmio.data;
	440
	441	if (bytes > sizeof(run->mmio.data)) {
	442	printk(KERN_ERR "%s: bad MMIO length: %d\n", __func__,
	443	run->mmio.len);
	444	}
	445
	446	run->mmio.phys_addr = vcpu->arch.paddr_accessed;
	447	run->mmio.len = bytes;
	448	run->mmio.is_write = 1;
	449	vcpu->mmio_needed = 1;
	450	vcpu->mmio_is_write = 1;
	451
	452	/* Store the value at the lowest bytes in 'data'. */
	453	if (is_bigendian) {
	454	switch (bytes) {
b104d066	455	case 8: (u64 )data = val; break;
bbf45ba5 HB	456	case 4: (u32 )data = val; break;
	457	case 2: (u16 )data = val; break;
	458	case 1: (u8 )data = val; break;
	459	}
	460	} else {
	461	/* Store LE value into 'data'. */
	462	switch (bytes) {
	463	case 4: st_le32(data, val); break;
	464	case 2: st_le16(data, val); break;
	465	case 1: (u8 )data = val; break;
	466	}
	467	}
	468
	469	return EMULATE_DO_MMIO;
	470	}
	471
	472	int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu vcpu, struct kvm_run run)
	473	{
	474	int r;
	475	sigset_t sigsaved;
	476
	477	if (vcpu->sigset_active)
	478	sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
	479
	480	if (vcpu->mmio_needed) {
	481	if (!vcpu->mmio_is_write)
	482	kvmppc_complete_mmio_load(vcpu, run);
	483	vcpu->mmio_needed = 0;
	484	} else if (vcpu->arch.dcr_needed) {
	485	if (!vcpu->arch.dcr_is_write)
	486	kvmppc_complete_dcr_load(vcpu, run);
	487	vcpu->arch.dcr_needed = 0;
ad0a048b AG	488	} else if (vcpu->arch.osi_needed) {
	489	u64 *gprs = run->osi.gprs;
	490	int i;
	491
	492	for (i = 0; i < 32; i++)
	493	kvmppc_set_gpr(vcpu, i, gprs[i]);
	494	vcpu->arch.osi_needed = 0;
bbf45ba5 HB	495	}
bbf45ba5 HB	496
9dd921cf	497	kvmppc_core_deliver_interrupts(vcpu);
bbf45ba5 HB	498
	499	local_irq_disable();
	500	kvm_guest_enter();
	501	r = __kvmppc_vcpu_run(run, vcpu);
	502	kvm_guest_exit();
	503	local_irq_enable();
	504
	505	if (vcpu->sigset_active)
	506	sigprocmask(SIG_SETMASK, &sigsaved, NULL);
	507
	508	return r;
	509	}
	510
	511	int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu vcpu, struct kvm_interrupt irq)
	512	{
18978768 AG	513	if (irq->irq == KVM_INTERRUPT_UNSET)
	514	kvmppc_core_dequeue_external(vcpu, irq);
	515	else
	516	kvmppc_core_queue_external(vcpu, irq);
45c5eb67 HB	517
	518	if (waitqueue_active(&vcpu->wq)) {
	519	wake_up_interruptible(&vcpu->wq);
	520	vcpu->stat.halt_wakeup++;
	521	}
	522
bbf45ba5 HB	523	return 0;
	524	}
	525
71fbfd5f AG	526	static int kvm_vcpu_ioctl_enable_cap(struct kvm_vcpu *vcpu,
	527	struct kvm_enable_cap *cap)
	528	{
	529	int r;
	530
	531	if (cap->flags)
	532	return -EINVAL;
	533
	534	switch (cap->cap) {
ad0a048b AG	535	case KVM_CAP_PPC_OSI:
	536	r = 0;
	537	vcpu->arch.osi_enabled = true;
	538	break;
71fbfd5f AG	539	default:
	540	r = -EINVAL;
	541	break;
	542	}
	543
	544	return r;
	545	}
	546
bbf45ba5 HB	547	int kvm_arch_vcpu_ioctl_get_mpstate(struct kvm_vcpu *vcpu,
	548	struct kvm_mp_state *mp_state)
	549	{
	550	return -EINVAL;
	551	}
	552
	553	int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu *vcpu,
	554	struct kvm_mp_state *mp_state)
	555	{
	556	return -EINVAL;
	557	}
	558
	559	long kvm_arch_vcpu_ioctl(struct file *filp,
	560	unsigned int ioctl, unsigned long arg)
	561	{
	562	struct kvm_vcpu *vcpu = filp->private_data;
	563	void __user argp = (void __user )arg;
	564	long r;
	565
93736624 AK	566	switch (ioctl) {
93736624 AK	567	case KVM_INTERRUPT: {
bbf45ba5 HB	568	struct kvm_interrupt irq;
	569	r = -EFAULT;
	570	if (copy_from_user(&irq, argp, sizeof(irq)))
93736624	571	goto out;
bbf45ba5	572	r = kvm_vcpu_ioctl_interrupt(vcpu, &irq);
93736624	573	goto out;
bbf45ba5	574	}
19483d14	575
71fbfd5f AG	576	case KVM_ENABLE_CAP:
	577	{
	578	struct kvm_enable_cap cap;
	579	r = -EFAULT;
	580	if (copy_from_user(&cap, argp, sizeof(cap)))
	581	goto out;
	582	r = kvm_vcpu_ioctl_enable_cap(vcpu, &cap);
	583	break;
	584	}
bbf45ba5 HB	585	default:
	586	r = -EINVAL;
	587	}
	588
	589	out:
	590	return r;
	591	}
	592
15711e9c AG	593	static int kvm_vm_ioctl_get_pvinfo(struct kvm_ppc_pvinfo *pvinfo)
	594	{
	595	u32 inst_lis = 0x3c000000;
	596	u32 inst_ori = 0x60000000;
	597	u32 inst_nop = 0x60000000;
	598	u32 inst_sc = 0x44000002;
	599	u32 inst_imm_mask = 0xffff;
	600
	601	/*
	602	* The hypercall to get into KVM from within guest context is as
	603	* follows:
	604	*
	605	* lis r0, r0, KVM_SC_MAGIC_R0@h
	606	* ori r0, KVM_SC_MAGIC_R0@l
	607	* sc
	608	* nop
	609	*/
	610	pvinfo->hcall[0] = inst_lis \| ((KVM_SC_MAGIC_R0 >> 16) & inst_imm_mask);
	611	pvinfo->hcall[1] = inst_ori \| (KVM_SC_MAGIC_R0 & inst_imm_mask);
	612	pvinfo->hcall[2] = inst_sc;
	613	pvinfo->hcall[3] = inst_nop;
	614
	615	return 0;
	616	}
	617
bbf45ba5 HB	618	long kvm_arch_vm_ioctl(struct file *filp,
	619	unsigned int ioctl, unsigned long arg)
	620	{
15711e9c	621	void __user argp = (void __user )arg;
bbf45ba5 HB	622	long r;
	623
	624	switch (ioctl) {
15711e9c AG	625	case KVM_PPC_GET_PVINFO: {
15711e9c AG	626	struct kvm_ppc_pvinfo pvinfo;
d8cdddcd	627	memset(&pvinfo, 0, sizeof(pvinfo));
15711e9c AG	628	r = kvm_vm_ioctl_get_pvinfo(&pvinfo);
	629	if (copy_to_user(argp, &pvinfo, sizeof(pvinfo))) {
	630	r = -EFAULT;
	631	goto out;
	632	}
	633
	634	break;
	635	}
bbf45ba5	636	default:
367e1319	637	r = -ENOTTY;
bbf45ba5 HB	638	}
bbf45ba5 HB	639
15711e9c	640	out:
bbf45ba5 HB	641	return r;
	642	}
	643
	644	int kvm_arch_init(void *opaque)
	645	{
	646	return 0;
	647	}
	648
	649	void kvm_arch_exit(void)
	650	{
	651	}