KVM: In kernel PIT model (7837699f) · Commits · e / devices / android_kernel_teracube_emerald

arch/x86/kvm/Makefile

+2 −1

Original line number	Original line	Diff line number	Diff line
	@@ -6,7 +6,8 @@ common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o)

	EXTRA_CFLAGS += -Ivirt/kvm -Iarch/x86/kvm		EXTRA_CFLAGS += -Ivirt/kvm -Iarch/x86/kvm

	kvm-objs := $(common-objs) x86.o mmu.o x86_emulate.o i8259.o irq.o lapic.o		kvm-objs := $(common-objs) x86.o mmu.o x86_emulate.o i8259.o irq.o lapic.o \
			i8254.o
	obj-$(CONFIG_KVM) += kvm.o		obj-$(CONFIG_KVM) += kvm.o
	kvm-intel-objs = vmx.o		kvm-intel-objs = vmx.o
	obj-$(CONFIG_KVM_INTEL) += kvm-intel.o		obj-$(CONFIG_KVM_INTEL) += kvm-intel.o

arch/x86/kvm/i8254.c

0 → 100644

+586 −0

Original line number	Original line	Diff line number	Diff line
			/*
			* 8253/8254 interval timer emulation
			*
			* Copyright (c) 2003-2004 Fabrice Bellard
			* Copyright (c) 2006 Intel Corporation
			* Copyright (c) 2007 Keir Fraser, XenSource Inc
			* Copyright (c) 2008 Intel Corporation
			*
			* Permission is hereby granted, free of charge, to any person obtaining a copy
			* of this software and associated documentation files (the "Software"), to deal
			* in the Software without restriction, including without limitation the rights
			* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
			* copies of the Software, and to permit persons to whom the Software is
			* furnished to do so, subject to the following conditions:
			*
			* The above copyright notice and this permission notice shall be included in
			* all copies or substantial portions of the Software.
			*
			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
			* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
			* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
			* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
			* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
			* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
			* THE SOFTWARE.
			*
			* Authors:
			* Sheng Yang <sheng.yang@intel.com>
			* Based on QEMU and Xen.
			*/

			#include <linux/kvm_host.h>

			#include "irq.h"
			#include "i8254.h"

			#ifndef CONFIG_X86_64
			#define mod_64(x, y) ((x) - (y) * div64_64(x, y))
			#else
			#define mod_64(x, y) ((x) % (y))
			#endif

			#define RW_STATE_LSB 1
			#define RW_STATE_MSB 2
			#define RW_STATE_WORD0 3
			#define RW_STATE_WORD1 4

			/* Compute with 96 bit intermediate result: (ab)/c /
			static u64 muldiv64(u64 a, u32 b, u32 c)
			{
			union {
			u64 ll;
			struct {
			u32 low, high;
			} l;
			} u, res;
			u64 rl, rh;

			u.ll = a;
			rl = (u64)u.l.low * (u64)b;
			rh = (u64)u.l.high * (u64)b;
			rh += (rl >> 32);
			res.l.high = div64_64(rh, c);
			res.l.low = div64_64(((mod_64(rh, c) << 32) + (rl & 0xffffffff)), c);
			return res.ll;
			}

			static void pit_set_gate(struct kvm *kvm, int channel, u32 val)
			{
			struct kvm_kpit_channel_state *c =
			&kvm->arch.vpit->pit_state.channels[channel];

			WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock));

			switch (c->mode) {
			default:
			case 0:
			case 4:
			/* XXX: just disable/enable counting */
			break;
			case 1:
			case 2:
			case 3:
			case 5:
			/* Restart counting on rising edge. */
			if (c->gate < val)
			c->count_load_time = ktime_get();
			break;
			}

			c->gate = val;
			}

			int pit_get_gate(struct kvm *kvm, int channel)
			{
			WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock));

			return kvm->arch.vpit->pit_state.channels[channel].gate;
			}

			static int pit_get_count(struct kvm *kvm, int channel)
			{
			struct kvm_kpit_channel_state *c =
			&kvm->arch.vpit->pit_state.channels[channel];
			s64 d, t;
			int counter;

			WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock));

			t = ktime_to_ns(ktime_sub(ktime_get(), c->count_load_time));
			d = muldiv64(t, KVM_PIT_FREQ, NSEC_PER_SEC);

			switch (c->mode) {
			case 0:
			case 1:
			case 4:
			case 5:
			counter = (c->count - d) & 0xffff;
			break;
			case 3:
			/* XXX: may be incorrect for odd counts */
			counter = c->count - (mod_64((2 * d), c->count));
			break;
			default:
			counter = c->count - mod_64(d, c->count);
			break;
			}
			return counter;
			}

			static int pit_get_out(struct kvm *kvm, int channel)
			{
			struct kvm_kpit_channel_state *c =
			&kvm->arch.vpit->pit_state.channels[channel];
			s64 d, t;
			int out;

			WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock));

			t = ktime_to_ns(ktime_sub(ktime_get(), c->count_load_time));
			d = muldiv64(t, KVM_PIT_FREQ, NSEC_PER_SEC);

			switch (c->mode) {
			default:
			case 0:
			out = (d >= c->count);
			break;
			case 1:
			out = (d < c->count);
			break;
			case 2:
			out = ((mod_64(d, c->count) == 0) && (d != 0));
			break;
			case 3:
			out = (mod_64(d, c->count) < ((c->count + 1) >> 1));
			break;
			case 4:
			case 5:
			out = (d == c->count);
			break;
			}

			return out;
			}

			static void pit_latch_count(struct kvm *kvm, int channel)
			{
			struct kvm_kpit_channel_state *c =
			&kvm->arch.vpit->pit_state.channels[channel];

			WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock));

			if (!c->count_latched) {
			c->latched_count = pit_get_count(kvm, channel);
			c->count_latched = c->rw_mode;
			}
			}

			static void pit_latch_status(struct kvm *kvm, int channel)
			{
			struct kvm_kpit_channel_state *c =
			&kvm->arch.vpit->pit_state.channels[channel];

			WARN_ON(!mutex_is_locked(&kvm->arch.vpit->pit_state.lock));

			if (!c->status_latched) {
			/* TODO: Return NULL COUNT (bit 6). */
			c->status = ((pit_get_out(kvm, channel) << 7) \|
			(c->rw_mode << 4) \|
			(c->mode << 1) \|
			c->bcd);
			c->status_latched = 1;
			}
			}

			int __pit_timer_fn(struct kvm_kpit_state *ps)
			{
			struct kvm_vcpu *vcpu0 = ps->pit->kvm->vcpus[0];
			struct kvm_kpit_timer *pt = &ps->pit_timer;

			atomic_inc(&pt->pending);
			smp_mb__after_atomic_inc();
			/* FIXME: handle case where the guest is in guest mode */
			if (vcpu0 && waitqueue_active(&vcpu0->wq)) {
			vcpu0->arch.mp_state = VCPU_MP_STATE_RUNNABLE;
			wake_up_interruptible(&vcpu0->wq);
			}

			pt->timer.expires = ktime_add_ns(pt->timer.expires, pt->period);
			pt->scheduled = ktime_to_ns(pt->timer.expires);

			return (pt->period == 0 ? 0 : 1);
			}

			static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
			{
			struct kvm_kpit_state *ps;
			int restart_timer = 0;

			ps = container_of(data, struct kvm_kpit_state, pit_timer.timer);

			restart_timer = __pit_timer_fn(ps);

			if (restart_timer)
			return HRTIMER_RESTART;
			else
			return HRTIMER_NORESTART;
			}

			static void destroy_pit_timer(struct kvm_kpit_timer *pt)
			{
			pr_debug("pit: execute del timer!\n");
			hrtimer_cancel(&pt->timer);
			}

			static void create_pit_timer(struct kvm_kpit_timer *pt, u32 val, int is_period)
			{
			s64 interval;

			interval = muldiv64(val, NSEC_PER_SEC, KVM_PIT_FREQ);

			pr_debug("pit: create pit timer, interval is %llu nsec\n", interval);

			/* TODO The new value only affected after the retriggered */
			hrtimer_cancel(&pt->timer);
			pt->period = (is_period == 0) ? 0 : interval;
			pt->timer.function = pit_timer_fn;
			atomic_set(&pt->pending, 0);

			hrtimer_start(&pt->timer, ktime_add_ns(ktime_get(), interval),
			HRTIMER_MODE_ABS);
			}

			static void pit_load_count(struct kvm *kvm, int channel, u32 val)
			{
			struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;

			WARN_ON(!mutex_is_locked(&ps->lock));

			pr_debug("pit: load_count val is %d, channel is %d\n", val, channel);

			/*
			* Though spec said the state of 8254 is undefined after power-up,
			* seems some tricky OS like Windows XP depends on IRQ0 interrupt
			* when booting up.
			* So here setting initialize rate for it, and not a specific number
			*/
			if (val == 0)
			val = 0x10000;

			ps->channels[channel].count_load_time = ktime_get();
			ps->channels[channel].count = val;

			if (channel != 0)
			return;

			/* Two types of timer
			* mode 1 is one shot, mode 2 is period, otherwise del timer */
			switch (ps->channels[0].mode) {
			case 1:
			create_pit_timer(&ps->pit_timer, val, 0);
			break;
			case 2:
			create_pit_timer(&ps->pit_timer, val, 1);
			break;
			default:
			destroy_pit_timer(&ps->pit_timer);
			}
			}

			static void pit_ioport_write(struct kvm_io_device *this,
			gpa_t addr, int len, const void *data)
			{
			struct kvm_pit pit = (struct kvm_pit )this->private;
			struct kvm_kpit_state *pit_state = &pit->pit_state;
			struct kvm *kvm = pit->kvm;
			int channel, access;
			struct kvm_kpit_channel_state *s;
			u32 val = (u32 ) data;

			val &= 0xff;
			addr &= KVM_PIT_CHANNEL_MASK;

			mutex_lock(&pit_state->lock);

			if (val != 0)
			pr_debug("pit: write addr is 0x%x, len is %d, val is 0x%x\n",
			(unsigned int)addr, len, val);

			if (addr == 3) {
			channel = val >> 6;
			if (channel == 3) {
			/* Read-Back Command. */
			for (channel = 0; channel < 3; channel++) {
			s = &pit_state->channels[channel];
			if (val & (2 << channel)) {
			if (!(val & 0x20))
			pit_latch_count(kvm, channel);
			if (!(val & 0x10))
			pit_latch_status(kvm, channel);
			}
			}
			} else {
			/* Select Counter <channel>. */
			s = &pit_state->channels[channel];
			access = (val >> 4) & KVM_PIT_CHANNEL_MASK;
			if (access == 0) {
			pit_latch_count(kvm, channel);
			} else {
			s->rw_mode = access;
			s->read_state = access;
			s->write_state = access;
			s->mode = (val >> 1) & 7;
			if (s->mode > 5)
			s->mode -= 4;
			s->bcd = val & 1;
			}
			}
			} else {
			/* Write Count. */
			s = &pit_state->channels[addr];
			switch (s->write_state) {
			default:
			case RW_STATE_LSB:
			pit_load_count(kvm, addr, val);
			break;
			case RW_STATE_MSB:
			pit_load_count(kvm, addr, val << 8);
			break;
			case RW_STATE_WORD0:
			s->write_latch = val;
			s->write_state = RW_STATE_WORD1;
			break;
			case RW_STATE_WORD1:
			pit_load_count(kvm, addr, s->write_latch \| (val << 8));
			s->write_state = RW_STATE_WORD0;
			break;
			}
			}

			mutex_unlock(&pit_state->lock);
			}

			static void pit_ioport_read(struct kvm_io_device *this,
			gpa_t addr, int len, void *data)
			{
			struct kvm_pit pit = (struct kvm_pit )this->private;
			struct kvm_kpit_state *pit_state = &pit->pit_state;
			struct kvm *kvm = pit->kvm;
			int ret, count;
			struct kvm_kpit_channel_state *s;

			addr &= KVM_PIT_CHANNEL_MASK;
			s = &pit_state->channels[addr];

			mutex_lock(&pit_state->lock);

			if (s->status_latched) {
			s->status_latched = 0;
			ret = s->status;
			} else if (s->count_latched) {
			switch (s->count_latched) {
			default:
			case RW_STATE_LSB:
			ret = s->latched_count & 0xff;
			s->count_latched = 0;
			break;
			case RW_STATE_MSB:
			ret = s->latched_count >> 8;
			s->count_latched = 0;
			break;
			case RW_STATE_WORD0:
			ret = s->latched_count & 0xff;
			s->count_latched = RW_STATE_MSB;
			break;
			}
			} else {
			switch (s->read_state) {
			default:
			case RW_STATE_LSB:
			count = pit_get_count(kvm, addr);
			ret = count & 0xff;
			break;
			case RW_STATE_MSB:
			count = pit_get_count(kvm, addr);
			ret = (count >> 8) & 0xff;
			break;
			case RW_STATE_WORD0:
			count = pit_get_count(kvm, addr);
			ret = count & 0xff;
			s->read_state = RW_STATE_WORD1;
			break;
			case RW_STATE_WORD1:
			count = pit_get_count(kvm, addr);
			ret = (count >> 8) & 0xff;
			s->read_state = RW_STATE_WORD0;
			break;
			}
			}

			if (len > sizeof(ret))
			len = sizeof(ret);
			memcpy(data, (char *)&ret, len);

			mutex_unlock(&pit_state->lock);
			}

			static int pit_in_range(struct kvm_io_device *this, gpa_t addr)
			{
			return ((addr >= KVM_PIT_BASE_ADDRESS) &&
			(addr < KVM_PIT_BASE_ADDRESS + KVM_PIT_MEM_LENGTH));
			}

			static void speaker_ioport_write(struct kvm_io_device *this,
			gpa_t addr, int len, const void *data)
			{
			struct kvm_pit pit = (struct kvm_pit )this->private;
			struct kvm_kpit_state *pit_state = &pit->pit_state;
			struct kvm *kvm = pit->kvm;
			u32 val = (u32 ) data;

			mutex_lock(&pit_state->lock);
			pit_state->speaker_data_on = (val >> 1) & 1;
			pit_set_gate(kvm, 2, val & 1);
			mutex_unlock(&pit_state->lock);
			}

			static void speaker_ioport_read(struct kvm_io_device *this,
			gpa_t addr, int len, void *data)
			{
			struct kvm_pit pit = (struct kvm_pit )this->private;
			struct kvm_kpit_state *pit_state = &pit->pit_state;
			struct kvm *kvm = pit->kvm;
			unsigned int refresh_clock;
			int ret;

			/* Refresh clock toggles at about 15us. We approximate as 2^14ns. */
			refresh_clock = ((unsigned int)ktime_to_ns(ktime_get()) >> 14) & 1;

			mutex_lock(&pit_state->lock);
			ret = ((pit_state->speaker_data_on << 1) \| pit_get_gate(kvm, 2) \|
			(pit_get_out(kvm, 2) << 5) \| (refresh_clock << 4));
			if (len > sizeof(ret))
			len = sizeof(ret);
			memcpy(data, (char *)&ret, len);
			mutex_unlock(&pit_state->lock);
			}

			static int speaker_in_range(struct kvm_io_device *this, gpa_t addr)
			{
			return (addr == KVM_SPEAKER_BASE_ADDRESS);
			}

			struct kvm_pit kvm_create_pit(struct kvm kvm)
			{
			int i;
			struct kvm_pit *pit;
			struct kvm_kpit_state *pit_state;
			struct kvm_kpit_channel_state *c;

			pit = kzalloc(sizeof(struct kvm_pit), GFP_KERNEL);
			if (!pit)
			return NULL;

			mutex_init(&pit->pit_state.lock);
			mutex_lock(&pit->pit_state.lock);

			/* Initialize PIO device */
			pit->dev.read = pit_ioport_read;
			pit->dev.write = pit_ioport_write;
			pit->dev.in_range = pit_in_range;
			pit->dev.private = pit;
			kvm_io_bus_register_dev(&kvm->pio_bus, &pit->dev);

			pit->speaker_dev.read = speaker_ioport_read;
			pit->speaker_dev.write = speaker_ioport_write;
			pit->speaker_dev.in_range = speaker_in_range;
			pit->speaker_dev.private = pit;
			kvm_io_bus_register_dev(&kvm->pio_bus, &pit->speaker_dev);

			kvm->arch.vpit = pit;
			pit->kvm = kvm;

			pit_state = &pit->pit_state;
			pit_state->pit = pit;
			hrtimer_init(&pit_state->pit_timer.timer,
			CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
			atomic_set(&pit_state->pit_timer.pending, 0);
			for (i = 0; i < 3; i++) {
			c = &pit_state->channels[i];
			c->mode = 0xff;
			c->gate = (i != 2);
			pit_load_count(kvm, i, 0);
			}

			mutex_unlock(&pit->pit_state.lock);

			pit->pit_state.inject_pending = 1;

			return pit;
			}

			void kvm_free_pit(struct kvm *kvm)
			{
			struct hrtimer *timer;

			if (kvm->arch.vpit) {
			mutex_lock(&kvm->arch.vpit->pit_state.lock);
			timer = &kvm->arch.vpit->pit_state.pit_timer.timer;
			hrtimer_cancel(timer);
			mutex_unlock(&kvm->arch.vpit->pit_state.lock);
			kfree(kvm->arch.vpit);
			}
			}

			void __inject_pit_timer_intr(struct kvm *kvm)
			{
			mutex_lock(&kvm->lock);
			kvm_ioapic_set_irq(kvm->arch.vioapic, 0, 1);
			kvm_ioapic_set_irq(kvm->arch.vioapic, 0, 0);
			kvm_pic_set_irq(pic_irqchip(kvm), 0, 1);
			kvm_pic_set_irq(pic_irqchip(kvm), 0, 0);
			mutex_unlock(&kvm->lock);
			}

			void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu)
			{
			struct kvm_pit *pit = vcpu->kvm->arch.vpit;
			struct kvm *kvm = vcpu->kvm;
			struct kvm_kpit_state *ps;

			if (vcpu && pit) {
			ps = &pit->pit_state;

			/* Try to inject pending interrupts when:
			* 1. Pending exists
			* 2. Last interrupt was accepted or waited for too long time*/
			if (atomic_read(&ps->pit_timer.pending) &&
			(ps->inject_pending \|\|
			(jiffies - ps->last_injected_time
			>= KVM_MAX_PIT_INTR_INTERVAL))) {
			ps->inject_pending = 0;
			__inject_pit_timer_intr(kvm);
			ps->last_injected_time = jiffies;
			}
			}
			}

			void kvm_pit_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
			{
			struct kvm_arch *arch = &vcpu->kvm->arch;
			struct kvm_kpit_state *ps;

			if (vcpu && arch->vpit) {
			ps = &arch->vpit->pit_state;
			if (atomic_read(&ps->pit_timer.pending) &&
			(((arch->vpic->pics[0].imr & 1) == 0 &&
			arch->vpic->pics[0].irq_base == vec) \|\|
			(arch->vioapic->redirtbl[0].fields.vector == vec &&
			arch->vioapic->redirtbl[0].fields.mask != 1))) {
			ps->inject_pending = 1;
			atomic_dec(&ps->pit_timer.pending);
			ps->channels[0].count_load_time = ktime_get();
			}
			}
			}

arch/x86/kvm/i8254.h

0 → 100644

+61 −0

Original line number	Original line	Diff line number	Diff line
			#ifndef __I8254_H
			#define __I8254_H

			#include "iodev.h"

			struct kvm_kpit_timer {
			struct hrtimer timer;
			int irq;
			s64 period; /* unit: ns */
			s64 scheduled;
			ktime_t last_update;
			atomic_t pending;
			};

			struct kvm_kpit_channel_state {
			u32 count; /* can be 65536 */
			u16 latched_count;
			u8 count_latched;
			u8 status_latched;
			u8 status;
			u8 read_state;
			u8 write_state;
			u8 write_latch;
			u8 rw_mode;
			u8 mode;
			u8 bcd; /* not supported */
			u8 gate; /* timer start */
			ktime_t count_load_time;
			};

			struct kvm_kpit_state {
			struct kvm_kpit_channel_state channels[3];
			struct kvm_kpit_timer pit_timer;
			u32 speaker_data_on;
			struct mutex lock;
			struct kvm_pit *pit;
			bool inject_pending; /* if inject pending interrupts */
			unsigned long last_injected_time;
			};

			struct kvm_pit {
			unsigned long base_addresss;
			struct kvm_io_device dev;
			struct kvm_io_device speaker_dev;
			struct kvm *kvm;
			struct kvm_kpit_state pit_state;
			};

			#define KVM_PIT_BASE_ADDRESS 0x40
			#define KVM_SPEAKER_BASE_ADDRESS 0x61
			#define KVM_PIT_MEM_LENGTH 4
			#define KVM_PIT_FREQ 1193181
			#define KVM_MAX_PIT_INTR_INTERVAL HZ / 100
			#define KVM_PIT_CHANNEL_MASK 0x3

			void kvm_inject_pit_timer_irqs(struct kvm_vcpu *vcpu);
			void kvm_pit_timer_intr_post(struct kvm_vcpu *vcpu, int vec);
			struct kvm_pit kvm_create_pit(struct kvm kvm);
			void kvm_free_pit(struct kvm *kvm);

			#endif

arch/x86/kvm/irq.c

+3 −0

Original line number	Original line	Diff line number	Diff line
	@@ -23,6 +23,7 @@
	#include <linux/kvm_host.h>		#include <linux/kvm_host.h>

	#include "irq.h"		#include "irq.h"
			#include "i8254.h"

	/*		/*
	* check if there is pending interrupt without		* check if there is pending interrupt without
	@@ -66,6 +67,7 @@ EXPORT_SYMBOL_GPL(kvm_cpu_get_interrupt);
	void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)		void kvm_inject_pending_timer_irqs(struct kvm_vcpu *vcpu)
	{		{
	kvm_inject_apic_timer_irqs(vcpu);		kvm_inject_apic_timer_irqs(vcpu);
			kvm_inject_pit_timer_irqs(vcpu);
	/* TODO: PIT, RTC etc. */		/* TODO: PIT, RTC etc. */
	}		}
	EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);		EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
	@@ -73,6 +75,7 @@ EXPORT_SYMBOL_GPL(kvm_inject_pending_timer_irqs);
	void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)		void kvm_timer_intr_post(struct kvm_vcpu *vcpu, int vec)
	{		{
	kvm_apic_timer_intr_post(vcpu, vec);		kvm_apic_timer_intr_post(vcpu, vec);
			kvm_pit_timer_intr_post(vcpu, vec);
	/* TODO: PIT, RTC etc. */		/* TODO: PIT, RTC etc. */
	}		}
	EXPORT_SYMBOL_GPL(kvm_timer_intr_post);		EXPORT_SYMBOL_GPL(kvm_timer_intr_post);

arch/x86/kvm/x86.c

+9 −0

Original line number	Original line	Diff line number	Diff line
	@@ -17,6 +17,7 @@
	#include <linux/kvm_host.h>		#include <linux/kvm_host.h>
	#include "irq.h"		#include "irq.h"
	#include "mmu.h"		#include "mmu.h"
			#include "i8254.h"

	#include <linux/clocksource.h>		#include <linux/clocksource.h>
	#include <linux/kvm.h>		#include <linux/kvm.h>
	@@ -818,6 +819,7 @@ int kvm_dev_ioctl_check_extension(long ext)
	case KVM_CAP_SET_TSS_ADDR:		case KVM_CAP_SET_TSS_ADDR:
	case KVM_CAP_EXT_CPUID:		case KVM_CAP_EXT_CPUID:
	case KVM_CAP_CLOCKSOURCE:		case KVM_CAP_CLOCKSOURCE:
			case KVM_CAP_PIT:
	r = 1;		r = 1;
	break;		break;
	case KVM_CAP_VAPIC:		case KVM_CAP_VAPIC:
	@@ -1594,6 +1596,12 @@ long kvm_arch_vm_ioctl(struct file *filp,
	} else		} else
	goto out;		goto out;
	break;		break;
			case KVM_CREATE_PIT:
			r = -ENOMEM;
			kvm->arch.vpit = kvm_create_pit(kvm);
			if (kvm->arch.vpit)
			r = 0;
			break;
	case KVM_IRQ_LINE: {		case KVM_IRQ_LINE: {
	struct kvm_irq_level irq_event;		struct kvm_irq_level irq_event;

	@@ -3372,6 +3380,7 @@ static void kvm_free_vcpus(struct kvm *kvm)

	void kvm_arch_destroy_vm(struct kvm *kvm)		void kvm_arch_destroy_vm(struct kvm *kvm)
	{		{
			kvm_free_pit(kvm);
	kfree(kvm->arch.vpic);		kfree(kvm->arch.vpic);
	kfree(kvm->arch.vioapic);		kfree(kvm->arch.vioapic);
	kvm_free_vcpus(kvm);		kvm_free_vcpus(kvm);