kvm_timer_fn(), the sole inhabitant of timer.c, is only used by lapic.c. Move
it there to make it easier to hack on it.
struct kvm_timer is a thin wrapper around hrtimer, and only adds obfuscation.
Move near its two users (with different names) to prepare for simplification.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxx>
---
arch/x86/kvm/Makefile | 2 +-
arch/x86/kvm/i8254.c | 8 ++++----
arch/x86/kvm/i8254.h | 18 +++++++++++++++++-
arch/x86/kvm/kvm_timer.h | 18 ------------------
arch/x86/kvm/lapic.c | 30 +++++++++++++++++++++++++++++-
arch/x86/kvm/lapic.h | 17 ++++++++++++++++-
arch/x86/kvm/timer.c | 47 -----------------------------------------------
7 files changed, 67 insertions(+), 73 deletions(-)
delete mode 100644 arch/x86/kvm/kvm_timer.h
delete mode 100644 arch/x86/kvm/timer.c
diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index 4f579e8..04d3040 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -12,7 +12,7 @@ kvm-$(CONFIG_IOMMU_API) += $(addprefix ../../../virt/kvm/, iommu.o)
kvm-$(CONFIG_KVM_ASYNC_PF) += $(addprefix ../../../virt/kvm/, async_pf.o)
kvm-y += x86.o mmu.o emulate.o i8259.o irq.o lapic.o \
- i8254.o timer.o cpuid.o pmu.o
+ i8254.o cpuid.o pmu.o
kvm-intel-y += vmx.o
kvm-amd-y += svm.o
diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c
index adba28f..1d8e757 100644
--- a/arch/x86/kvm/i8254.c
+++ b/arch/x86/kvm/i8254.c
@@ -272,14 +272,14 @@ static void destroy_pit_timer(struct kvm_pit *pit)
flush_kthread_work(&pit->expired);
}
-static bool kpit_is_periodic(struct kvm_timer *ktimer)
+static bool kpit_is_periodic(struct kvm_pit_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 = {
+static struct kvm_pit_timer_ops kpit_ops = {
.is_periodic = kpit_is_periodic,
};
@@ -322,7 +322,7 @@ static void pit_do_work(struct kthread_work *work)
static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
{
- struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
+ struct kvm_pit_timer *ktimer = container_of(data, struct kvm_pit_timer, timer);
struct kvm_pit *pt = ktimer->kvm->arch.vpit;
if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
@@ -340,7 +340,7 @@ static enum hrtimer_restart pit_timer_fn(struct hrtimer *data)
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;
+ struct kvm_pit_timer *pt = &ps->pit_timer;
s64 interval;
if (!irqchip_in_kernel(kvm) || ps->flags & KVM_PIT_FLAGS_HPET_LEGACY)
diff --git a/arch/x86/kvm/i8254.h b/arch/x86/kvm/i8254.h
index fdf4042..3351816 100644
--- a/arch/x86/kvm/i8254.h
+++ b/arch/x86/kvm/i8254.h
@@ -21,10 +21,26 @@ struct kvm_kpit_channel_state {
ktime_t count_load_time;
};
+struct kvm_pit_timer {
+ struct hrtimer timer;
+ s64 period; /* unit: ns */
+ u32 timer_mode_mask;
+ u64 tscdeadline;
+ atomic_t pending; /* accumulated triggered timers */
+ bool reinject;
+ struct kvm_pit_timer_ops *t_ops;
+ struct kvm *kvm;
+ struct kvm_vcpu *vcpu;
+};
+
+struct kvm_pit_timer_ops {
+ bool (*is_periodic)(struct kvm_pit_timer *);
+};
+
struct kvm_kpit_state {
struct kvm_kpit_channel_state channels[3];
u32 flags;
- struct kvm_timer pit_timer;
+ struct kvm_pit_timer pit_timer;
bool is_periodic;
u32 speaker_data_on;
struct mutex lock;
diff --git a/arch/x86/kvm/kvm_timer.h b/arch/x86/kvm/kvm_timer.h
deleted file mode 100644
index 497dbaa3..0000000
--- a/arch/x86/kvm/kvm_timer.h
+++ /dev/null
@@ -1,18 +0,0 @@
-
-struct kvm_timer {
- struct hrtimer timer;
- s64 period; /* unit: ns */
- u32 timer_mode_mask;
- u64 tscdeadline;
- atomic_t pending; /* accumulated triggered timers */
- bool reinject;
- struct kvm_timer_ops *t_ops;
- struct kvm *kvm;
- struct kvm_vcpu *vcpu;
-};
-
-struct kvm_timer_ops {
- bool (*is_periodic)(struct kvm_timer *);
-};
-
-enum hrtimer_restart kvm_timer_fn(struct hrtimer *data);
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index fff7173..a835a32 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1260,6 +1260,34 @@ void kvm_apic_nmi_wd_deliver(struct kvm_vcpu *vcpu)
.write = apic_mmio_write,
};
+static enum hrtimer_restart apic_timer_fn(struct hrtimer *data)
+{
+ struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
+ struct kvm_vcpu *vcpu = ktimer->vcpu;
+ wait_queue_head_t *q = &vcpu->wq;
+
+ /*
+ * There is a race window between reading and incrementing, but we do
+ * not care about potentially losing timer events in the !reinject
+ * case anyway. Note: KVM_REQ_PENDING_TIMER is implicitly checked
+ * in vcpu_enter_guest.
+ */
+ if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
+ atomic_inc(&ktimer->pending);
+ /* FIXME: this code should not know anything about vcpus */
+ kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
+ }
+
+ if (waitqueue_active(q))
+ wake_up_interruptible(q);
+
+ if (ktimer->t_ops->is_periodic(ktimer)) {
+ hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
+ return HRTIMER_RESTART;
+ } else
+ return HRTIMER_NORESTART;
+}
+
int kvm_create_lapic(struct kvm_vcpu *vcpu)
{
struct kvm_lapic *apic;
@@ -1283,7 +1311,7 @@ int kvm_create_lapic(struct kvm_vcpu *vcpu)
hrtimer_init(&apic->lapic_timer.timer, CLOCK_MONOTONIC,
HRTIMER_MODE_ABS);
- apic->lapic_timer.timer.function = kvm_timer_fn;
+ apic->lapic_timer.timer.function = apic_timer_fn;
apic->lapic_timer.t_ops = &lapic_timer_ops;
apic->lapic_timer.kvm = vcpu->kvm;
apic->lapic_timer.vcpu = vcpu;
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 4af5405..d7251c9 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -2,10 +2,25 @@
#define __KVM_X86_LAPIC_H
#include "iodev.h"
-#include "kvm_timer.h"
#include <linux/kvm_host.h>
+struct kvm_timer {
+ struct hrtimer timer;
+ s64 period; /* unit: ns */
+ u32 timer_mode_mask;
+ u64 tscdeadline;
+ atomic_t pending; /* accumulated triggered timers */
+ bool reinject;
+ struct kvm_timer_ops *t_ops;
+ struct kvm *kvm;
+ struct kvm_vcpu *vcpu;
+};
+
+struct kvm_timer_ops {
+ bool (*is_periodic)(struct kvm_timer *);
+};
+
struct kvm_lapic {
unsigned long base_address;
struct kvm_io_device dev;
diff --git a/arch/x86/kvm/timer.c b/arch/x86/kvm/timer.c
deleted file mode 100644
index 6b85cc6..0000000
--- a/arch/x86/kvm/timer.c
+++ /dev/null
@@ -1,47 +0,0 @@
-/*
- * Kernel-based Virtual Machine driver for Linux
- *
- * This module enables machines with Intel VT-x extensions to run virtual
- * machines without emulation or binary translation.
- *
- * timer support
- *
- * Copyright 2010 Red Hat, Inc. and/or its affiliates.
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- */
-
-#include <linux/kvm_host.h>
-#include <linux/kvm.h>
-#include <linux/hrtimer.h>
-#include <linux/atomic.h>
-#include "kvm_timer.h"
-
-enum hrtimer_restart kvm_timer_fn(struct hrtimer *data)
-{
- struct kvm_timer *ktimer = container_of(data, struct kvm_timer, timer);
- struct kvm_vcpu *vcpu = ktimer->vcpu;
- wait_queue_head_t *q = &vcpu->wq;
-
- /*
- * There is a race window between reading and incrementing, but we do
- * not care about potentially losing timer events in the !reinject
- * case anyway. Note: KVM_REQ_PENDING_TIMER is implicitly checked
- * in vcpu_enter_guest.
- */
- if (ktimer->reinject || !atomic_read(&ktimer->pending)) {
- atomic_inc(&ktimer->pending);
- /* FIXME: this code should not know anything about vcpus */
- kvm_make_request(KVM_REQ_PENDING_TIMER, vcpu);
- }
-
- if (waitqueue_active(q))
- wake_up_interruptible(q);
-
- if (ktimer->t_ops->is_periodic(ktimer)) {
- hrtimer_add_expires_ns(&ktimer->timer, ktimer->period);
- return HRTIMER_RESTART;
- } else
- return HRTIMER_NORESTART;
-}
--
1.7.11.3
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