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Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kvm/i8254.c')
-rw-r--r--ANDROID_3.4.5/arch/x86/kvm/i8254.c765
1 files changed, 0 insertions, 765 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kvm/i8254.c b/ANDROID_3.4.5/arch/x86/kvm/i8254.c
deleted file mode 100644
index d68f99df..00000000
--- a/ANDROID_3.4.5/arch/x86/kvm/i8254.c
+++ /dev/null
@@ -1,765 +0,0 @@
-/*
- * 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
- * Copyright 2009 Red Hat, Inc. and/or its affiliates.
- *
- * 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.
- */
-
-#define pr_fmt(fmt) "pit: " fmt
-
-#include <linux/kvm_host.h>
-#include <linux/slab.h>
-#include <linux/workqueue.h>
-
-#include "irq.h"
-#include "i8254.h"
-
-#ifndef CONFIG_X86_64
-#define mod_64(x, y) ((x) - (y) * div64_u64(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: (a*b)/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_u64(rh, c);
- res.l.low = div64_u64(((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;
-}
-
-static 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 s64 __kpit_elapsed(struct kvm *kvm)
-{
- s64 elapsed;
- ktime_t remaining;
- struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
-
- if (!ps->pit_timer.period)
- return 0;
-
- /*
- * The Counter does not stop when it reaches zero. In
- * Modes 0, 1, 4, and 5 the Counter ``wraps around'' to
- * the highest count, either FFFF hex for binary counting
- * or 9999 for BCD counting, and continues counting.
- * Modes 2 and 3 are periodic; the Counter reloads
- * itself with the initial count and continues counting
- * from there.
- */
- remaining = hrtimer_get_remaining(&ps->pit_timer.timer);
- elapsed = ps->pit_timer.period - ktime_to_ns(remaining);
- elapsed = mod_64(elapsed, ps->pit_timer.period);
-
- return elapsed;
-}
-
-static s64 kpit_elapsed(struct kvm *kvm, struct kvm_kpit_channel_state *c,
- int channel)
-{
- if (channel == 0)
- return __kpit_elapsed(kvm);
-
- return ktime_to_ns(ktime_sub(ktime_get(), c->count_load_time));
-}
-
-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 = kpit_elapsed(kvm, c, channel);
- 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 = kpit_elapsed(kvm, c, channel);
- 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;
- }
-}
-
-static void kvm_pit_ack_irq(struct kvm_irq_ack_notifier *kian)
-{
- struct kvm_kpit_state *ps = container_of(kian, struct kvm_kpit_state,
- irq_ack_notifier);
- int value;
-
- spin_lock(&ps->inject_lock);
- value = atomic_dec_return(&ps->pit_timer.pending);
- if (value < 0)
- /* spurious acks can be generated if, for example, the
- * PIC is being reset. Handle it gracefully here
- */
- atomic_inc(&ps->pit_timer.pending);
- else if (value > 0)
- /* in this case, we had multiple outstanding pit interrupts
- * that we needed to inject. Reinject
- */
- queue_work(ps->pit->wq, &ps->pit->expired);
- ps->irq_ack = 1;
- spin_unlock(&ps->inject_lock);
-}
-
-void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu)
-{
- struct kvm_pit *pit = vcpu->kvm->arch.vpit;
- struct hrtimer *timer;
-
- if (!kvm_vcpu_is_bsp(vcpu) || !pit)
- return;
-
- timer = &pit->pit_state.pit_timer.timer;
- if (hrtimer_cancel(timer))
- hrtimer_start_expires(timer, HRTIMER_MODE_ABS);
-}
-
-static void destroy_pit_timer(struct kvm_pit *pit)
-{
- hrtimer_cancel(&pit->pit_state.pit_timer.timer);
- cancel_work_sync(&pit->expired);
-}
-
-static bool kpit_is_periodic(struct kvm_timer *ktimer)
-{
- struct kvm_kpit_state *ps = container_of(ktimer, struct kvm_kpit_state,
- pit_timer);
- return ps->is_periodic;
-}
-
-static struct kvm_timer_ops kpit_ops = {
- .is_periodic = kpit_is_periodic,
-};
-
-static void pit_do_work(struct work_struct *work)
-{
- struct kvm_pit *pit = container_of(work, struct kvm_pit, expired);
- struct kvm *kvm = pit->kvm;
- struct kvm_vcpu *vcpu;
- int i;
- struct kvm_kpit_state *ps = &pit->pit_state;
- int inject = 0;
-
- /* Try to inject pending interrupts when
- * last one has been acked.
- */
- spin_lock(&ps->inject_lock);
- if (ps->irq_ack) {
- ps->irq_ack = 0;
- inject = 1;
- }
- spin_unlock(&ps->inject_lock);
- if (inject) {
- kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 1);
- kvm_set_irq(kvm, kvm->arch.vpit->irq_source_id, 0, 0);
-
- /*
- * Provides NMI watchdog support via Virtual Wire mode.
- * The route is: PIT -> PIC -> LVT0 in NMI mode.
- *
- * Note: Our Virtual Wire implementation is simplified, only
- * propagating PIT interrupts to all VCPUs when they have set
- * LVT0 to NMI delivery. Other PIC interrupts are just sent to
- * VCPU0, and only if its LVT0 is in EXTINT mode.
- */
- if (kvm->arch.vapics_in_nmi_mode > 0)
- kvm_for_each_vcpu(i, vcpu, kvm)
- kvm_apic_nmi_wd_deliver(vcpu);
- }
-}
-
-static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
-{
- struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
- struct kvm_pit *pt = ktimer->kvm->arch.vpit;
-
- if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
- atomic_inc(&ktimer->pending);
- queue_work(pt->wq, &pt->expired);
- }
-
- if (ktimer->t_ops->is_periodic(ktimer)) {
- hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
- return HRTIMER_RESTART;
- } else
- return HRTIMER_NORESTART;
-}
-
-static void create_pit_timer(struct kvm *kvm, u32 val, int is_period)
-{
- struct kvm_kpit_state *ps = &kvm->arch.vpit->pit_state;
- struct kvm_timer *pt = &ps->pit_timer;
- s64 interval;
-
- if (!irqchip_in_kernel(kvm) || ps->flags & KVM_PIT_FLAGS_HPET_LEGACY)
- return;
-
- interval = muldiv64(val, NSEC_PER_SEC, KVM_PIT_FREQ);
-
- pr_debug("create pit timer, interval is %llu nsec\n", interval);
-
- /* TODO The new value only affected after the retriggered */
- hrtimer_cancel(&pt->timer);
- cancel_work_sync(&ps->pit->expired);
- pt->period = interval;
- ps->is_periodic = is_period;
-
- pt->timer.function = pit_timer_fn;
- pt->t_ops = &kpit_ops;
- pt->kvm = ps->pit->kvm;
-
- atomic_set(&pt->pending, 0);
- ps->irq_ack = 1;
-
- 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("load_count val is %d, channel is %d\n", val, channel);
-
- /*
- * The largest possible initial count is 0; this is equivalent
- * to 216 for binary counting and 104 for BCD counting.
- */
- if (val == 0)
- val = 0x10000;
-
- ps->channels[channel].count = val;
-
- if (channel != 0) {
- ps->channels[channel].count_load_time = ktime_get();
- return;
- }
-
- /* Two types of timer
- * mode 1 is one shot, mode 2 is period, otherwise del timer */
- switch (ps->channels[0].mode) {
- case 0:
- case 1:
- /* FIXME: enhance mode 4 precision */
- case 4:
- create_pit_timer(kvm, val, 0);
- break;
- case 2:
- case 3:
- create_pit_timer(kvm, val, 1);
- break;
- default:
- destroy_pit_timer(kvm->arch.vpit);
- }
-}
-
-void kvm_pit_load_count(struct kvm *kvm, int channel, u32 val, int hpet_legacy_start)
-{
- u8 saved_mode;
- if (hpet_legacy_start) {
- /* save existing mode for later reenablement */
- saved_mode = kvm->arch.vpit->pit_state.channels[0].mode;
- kvm->arch.vpit->pit_state.channels[0].mode = 0xff; /* disable timer */
- pit_load_count(kvm, channel, val);
- kvm->arch.vpit->pit_state.channels[0].mode = saved_mode;
- } else {
- pit_load_count(kvm, channel, val);
- }
-}
-
-static inline struct kvm_pit *dev_to_pit(struct kvm_io_device *dev)
-{
- return container_of(dev, struct kvm_pit, dev);
-}
-
-static inline struct kvm_pit *speaker_to_pit(struct kvm_io_device *dev)
-{
- return container_of(dev, struct kvm_pit, speaker_dev);
-}
-
-static inline int pit_in_range(gpa_t addr)
-{
- return ((addr >= KVM_PIT_BASE_ADDRESS) &&
- (addr < KVM_PIT_BASE_ADDRESS + KVM_PIT_MEM_LENGTH));
-}
-
-static int pit_ioport_write(struct kvm_io_device *this,
- gpa_t addr, int len, const void *data)
-{
- struct kvm_pit *pit = dev_to_pit(this);
- 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;
- if (!pit_in_range(addr))
- return -EOPNOTSUPP;
-
- val &= 0xff;
- addr &= KVM_PIT_CHANNEL_MASK;
-
- mutex_lock(&pit_state->lock);
-
- if (val != 0)
- pr_debug("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);
- return 0;
-}
-
-static int pit_ioport_read(struct kvm_io_device *this,
- gpa_t addr, int len, void *data)
-{
- struct kvm_pit *pit = dev_to_pit(this);
- struct kvm_kpit_state *pit_state = &pit->pit_state;
- struct kvm *kvm = pit->kvm;
- int ret, count;
- struct kvm_kpit_channel_state *s;
- if (!pit_in_range(addr))
- return -EOPNOTSUPP;
-
- addr &= KVM_PIT_CHANNEL_MASK;
- if (addr == 3)
- return 0;
-
- 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);
- return 0;
-}
-
-static int speaker_ioport_write(struct kvm_io_device *this,
- gpa_t addr, int len, const void *data)
-{
- struct kvm_pit *pit = speaker_to_pit(this);
- struct kvm_kpit_state *pit_state = &pit->pit_state;
- struct kvm *kvm = pit->kvm;
- u32 val = *(u32 *) data;
- if (addr != KVM_SPEAKER_BASE_ADDRESS)
- return -EOPNOTSUPP;
-
- 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);
- return 0;
-}
-
-static int speaker_ioport_read(struct kvm_io_device *this,
- gpa_t addr, int len, void *data)
-{
- struct kvm_pit *pit = speaker_to_pit(this);
- struct kvm_kpit_state *pit_state = &pit->pit_state;
- struct kvm *kvm = pit->kvm;
- unsigned int refresh_clock;
- int ret;
- if (addr != KVM_SPEAKER_BASE_ADDRESS)
- return -EOPNOTSUPP;
-
- /* 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);
- return 0;
-}
-
-void kvm_pit_reset(struct kvm_pit *pit)
-{
- int i;
- struct kvm_kpit_channel_state *c;
-
- mutex_lock(&pit->pit_state.lock);
- pit->pit_state.flags = 0;
- for (i = 0; i < 3; i++) {
- c = &pit->pit_state.channels[i];
- c->mode = 0xff;
- c->gate = (i != 2);
- pit_load_count(pit->kvm, i, 0);
- }
- mutex_unlock(&pit->pit_state.lock);
-
- atomic_set(&pit->pit_state.pit_timer.pending, 0);
- pit->pit_state.irq_ack = 1;
-}
-
-static void pit_mask_notifer(struct kvm_irq_mask_notifier *kimn, bool mask)
-{
- struct kvm_pit *pit = container_of(kimn, struct kvm_pit, mask_notifier);
-
- if (!mask) {
- atomic_set(&pit->pit_state.pit_timer.pending, 0);
- pit->pit_state.irq_ack = 1;
- }
-}
-
-static const struct kvm_io_device_ops pit_dev_ops = {
- .read = pit_ioport_read,
- .write = pit_ioport_write,
-};
-
-static const struct kvm_io_device_ops speaker_dev_ops = {
- .read = speaker_ioport_read,
- .write = speaker_ioport_write,
-};
-
-/* Caller must hold slots_lock */
-struct kvm_pit *kvm_create_pit(struct kvm *kvm, u32 flags)
-{
- struct kvm_pit *pit;
- struct kvm_kpit_state *pit_state;
- int ret;
-
- pit = kzalloc(sizeof(struct kvm_pit), GFP_KERNEL);
- if (!pit)
- return NULL;
-
- pit->irq_source_id = kvm_request_irq_source_id(kvm);
- if (pit->irq_source_id < 0) {
- kfree(pit);
- return NULL;
- }
-
- mutex_init(&pit->pit_state.lock);
- mutex_lock(&pit->pit_state.lock);
- spin_lock_init(&pit->pit_state.inject_lock);
-
- pit->wq = create_singlethread_workqueue("kvm-pit-wq");
- if (!pit->wq) {
- mutex_unlock(&pit->pit_state.lock);
- kvm_free_irq_source_id(kvm, pit->irq_source_id);
- kfree(pit);
- return NULL;
- }
- INIT_WORK(&pit->expired, pit_do_work);
-
- 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);
- pit_state->irq_ack_notifier.gsi = 0;
- pit_state->irq_ack_notifier.irq_acked = kvm_pit_ack_irq;
- kvm_register_irq_ack_notifier(kvm, &pit_state->irq_ack_notifier);
- pit_state->pit_timer.reinject = true;
- mutex_unlock(&pit->pit_state.lock);
-
- kvm_pit_reset(pit);
-
- pit->mask_notifier.func = pit_mask_notifer;
- kvm_register_irq_mask_notifier(kvm, 0, &pit->mask_notifier);
-
- kvm_iodevice_init(&pit->dev, &pit_dev_ops);
- ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS, KVM_PIT_BASE_ADDRESS,
- KVM_PIT_MEM_LENGTH, &pit->dev);
- if (ret < 0)
- goto fail;
-
- if (flags & KVM_PIT_SPEAKER_DUMMY) {
- kvm_iodevice_init(&pit->speaker_dev, &speaker_dev_ops);
- ret = kvm_io_bus_register_dev(kvm, KVM_PIO_BUS,
- KVM_SPEAKER_BASE_ADDRESS, 4,
- &pit->speaker_dev);
- if (ret < 0)
- goto fail_unregister;
- }
-
- return pit;
-
-fail_unregister:
- kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &pit->dev);
-
-fail:
- kvm_unregister_irq_mask_notifier(kvm, 0, &pit->mask_notifier);
- kvm_unregister_irq_ack_notifier(kvm, &pit_state->irq_ack_notifier);
- kvm_free_irq_source_id(kvm, pit->irq_source_id);
- destroy_workqueue(pit->wq);
- kfree(pit);
- return NULL;
-}
-
-void kvm_free_pit(struct kvm *kvm)
-{
- struct hrtimer *timer;
-
- if (kvm->arch.vpit) {
- kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS, &kvm->arch.vpit->dev);
- kvm_io_bus_unregister_dev(kvm, KVM_PIO_BUS,
- &kvm->arch.vpit->speaker_dev);
- kvm_unregister_irq_mask_notifier(kvm, 0,
- &kvm->arch.vpit->mask_notifier);
- kvm_unregister_irq_ack_notifier(kvm,
- &kvm->arch.vpit->pit_state.irq_ack_notifier);
- mutex_lock(&kvm->arch.vpit->pit_state.lock);
- timer = &kvm->arch.vpit->pit_state.pit_timer.timer;
- hrtimer_cancel(timer);
- cancel_work_sync(&kvm->arch.vpit->expired);
- kvm_free_irq_source_id(kvm, kvm->arch.vpit->irq_source_id);
- mutex_unlock(&kvm->arch.vpit->pit_state.lock);
- destroy_workqueue(kvm->arch.vpit->wq);
- kfree(kvm->arch.vpit);
- }
-}
generated by cgit (git 2.34.1) at 2025-01-11 04:59:20 +0000