* [PATCH 3/9] KVM: Add irqdevice object
[not found] ` <20070524131917.11321.17746.stgit-sLgBBP33vUGnsjUZhwzVf9HuzzzSOjJt@public.gmane.org>
2007-05-24 13:22 ` [PATCH 1/9] KVM: Adds support for in-kernel mmio handlers Gregory Haskins
2007-05-24 13:22 ` [PATCH 2/9] KVM: VMX - fix interrupt checking on light-exit Gregory Haskins
@ 2007-05-24 13:23 ` Gregory Haskins
2007-05-24 13:23 ` [PATCH 4/9] KVM: Adds ability to preempt an executing VCPU Gregory Haskins
` (6 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Gregory Haskins @ 2007-05-24 13:23 UTC (permalink / raw)
To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
The current code is geared towards using a user-mode (A)PIC. This patch adds
an "irqdevice" abstraction, and implements a "userint" model to handle the
duties of the original code. Later, we can develop other irqdevice models
to handle objects like LAPIC, IOAPIC, i8259, etc, as appropriate
Signed-off-by: Gregory Haskins <ghaskins-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
---
drivers/kvm/Makefile | 2
drivers/kvm/irqdevice.h | 176 +++++++++++++++++++++++++++++++++++++
drivers/kvm/kvm.h | 94 +++++++++++++++++++-
drivers/kvm/kvm_main.c | 58 +++++++++---
drivers/kvm/svm.c | 162 ++++++++++++++++++++++++----------
drivers/kvm/userint.c | 223 +++++++++++++++++++++++++++++++++++++++++++++++
drivers/kvm/vmx.c | 161 +++++++++++++++++++++++++---------
7 files changed, 769 insertions(+), 107 deletions(-)
diff --git a/drivers/kvm/Makefile b/drivers/kvm/Makefile
index c0a789f..540afbc 100644
--- a/drivers/kvm/Makefile
+++ b/drivers/kvm/Makefile
@@ -2,7 +2,7 @@
# Makefile for Kernel-based Virtual Machine module
#
-kvm-objs := kvm_main.o mmu.o x86_emulate.o
+kvm-objs := kvm_main.o mmu.o x86_emulate.o userint.o
obj-$(CONFIG_KVM) += kvm.o
kvm-intel-objs = vmx.o
obj-$(CONFIG_KVM_INTEL) += kvm-intel.o
diff --git a/drivers/kvm/irqdevice.h b/drivers/kvm/irqdevice.h
new file mode 100644
index 0000000..097d179
--- /dev/null
+++ b/drivers/kvm/irqdevice.h
@@ -0,0 +1,176 @@
+/*
+ * Defines an interface for an abstract interrupt controller. The model
+ * consists of a unit with an arbitrary number of input lines N (IRQ0-(N-1)),
+ * an arbitrary number of output lines (INTR) (LINT, EXTINT, NMI, etc), and
+ * methods for completing an interrupt-acknowledge cycle (INTA). A particular
+ * implementation of this model will define various policies, such as
+ * irq-to-vector translation, INTA/auto-EOI policy, etc.
+ *
+ * In addition, the INTR callback mechanism allows the unit to be "wired" to
+ * an interruptible source in a very flexible manner. For instance, an
+ * irqdevice could have its INTR wired to a VCPU (ala LAPIC), or another
+ * interrupt controller (ala cascaded i8259s)
+ *
+ * Copyright (C) 2007 Novell
+ *
+ * Authors:
+ * Gregory Haskins <ghaskins-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef __IRQDEVICE_H
+#define __IRQDEVICE_H
+
+struct kvm_irqdevice;
+
+typedef enum {
+ kvm_irqpin_localint,
+ kvm_irqpin_extint,
+ kvm_irqpin_smi,
+ kvm_irqpin_nmi,
+ kvm_irqpin_invalid, /* must always be last */
+} kvm_irqpin_t;
+
+
+struct kvm_irqsink {
+ void (*set_intr)(struct kvm_irqsink *this,
+ struct kvm_irqdevice *dev,
+ kvm_irqpin_t pin);
+
+ void *private;
+};
+
+#define KVM_IRQACKDATA_VECTOR_VALID (1 << 0)
+#define KVM_IRQACKDATA_VECTOR_PENDING (1 << 1)
+
+#define KVM_IRQACK_FLAG_PEEK (1 << 0)
+
+struct kvm_irqack_data {
+ int flags;
+ int vector;
+};
+
+struct kvm_irqdevice {
+ int (*ack)(struct kvm_irqdevice *this, int flags,
+ struct kvm_irqack_data *data);
+ int (*set_pin)(struct kvm_irqdevice *this, int pin, int level);
+ void (*destructor)(struct kvm_irqdevice *this);
+
+ void *private;
+ struct kvm_irqsink sink;
+};
+
+/**
+ * kvm_irqdevice_init - initialize the kvm_irqdevice for use
+ * @dev: The device
+ *
+ * Description: Initialize the kvm_irqdevice for use. Should be called before
+ * calling any derived implementation init functions
+ *
+ * Returns: (void)
+ */
+static inline void kvm_irqdevice_init(struct kvm_irqdevice *dev)
+{
+ memset(dev, 0, sizeof(*dev));
+}
+
+/**
+ * kvm_irqdevice_ack - read and ack the highest priority vector from the device
+ * @dev: The device
+ * @flags: Modifies default behavior
+ * [ KVM_IRQACK_FLAG_PEEK - Dont ack vector, just check status ]
+ * @data: A pointer to a kvm_irqack_data structure to hold the result
+ *
+ * Description: Read the highest priority pending vector from the device,
+ * potentially invoking auto-EOI depending on device policy
+ *
+ * Successful return indicates that the *data* structure is valid
+ *
+ * data.flags -
+ * [KVM_IRQACKDATA_VECTOR_VALID - data.vector is valid]
+ * [KVM_IRQACKDATA_VECTOR_PENDING - more vectors are pending]
+ *
+ * Returns: (int)
+ * [-1 = failure]
+ * [ 0 = success]
+ */
+static inline int kvm_irqdevice_ack(struct kvm_irqdevice *dev, int flags,
+ struct kvm_irqack_data *data)
+{
+ return dev->ack(dev, flags, data);
+}
+
+/**
+ * kvm_irqdevice_set_pin - allows the caller to assert/deassert an IRQ
+ * @dev: The device
+ * @pin: The input pin to alter
+ * @level: The value to set (1 = assert, 0 = deassert)
+ *
+ * Description: Allows the caller to assert/deassert an IRQ input pin to the
+ * device according to device policy.
+ *
+ * Returns: (int)
+ * [-1 = failure]
+ * [ 0 = success]
+ */
+static inline int kvm_irqdevice_set_pin(struct kvm_irqdevice *dev, int pin,
+ int level)
+{
+ return dev->set_pin(dev, pin, level);
+}
+
+/**
+ * kvm_irqdevice_register_sink - registers an kvm_irqsink object
+ * @dev: The device
+ * @sink: The sink to register. Data will be copied so building object from
+ * transient storage is ok.
+ *
+ * Description: Registers an kvm_irqsink object as an INTR callback
+ *
+ * Returns: (void)
+ */
+static inline void kvm_irqdevice_register_sink(struct kvm_irqdevice *dev,
+ const struct kvm_irqsink *sink)
+{
+ dev->sink = *sink;
+}
+
+/**
+ * kvm_irqdevice_destructor - destroys an irqdevice
+ * @dev: The device
+ *
+ * Returns: (void)
+ */
+static inline void kvm_irqdevice_destructor(struct kvm_irqdevice *dev)
+{
+ dev->destructor(dev);
+}
+
+/**
+ * kvm_irqdevice_set_intr - invokes a registered INTR callback
+ * @dev: The device
+ * @pin: Identifies the pin to alter -
+ * [ KVM_IRQPIN_LOCALINT (default) - an vector is pending on this
+ * device]
+ * [ KVM_IRQPIN_EXTINT - a vector is pending on an external device]
+ * [ KVM_IRQPIN_SMI - system-management-interrupt pin]
+ * [ KVM_IRQPIN_NMI - non-maskable-interrupt pin
+ *
+ * Description: Invokes a registered INTR callback (if present). This
+ * function is meant to be used privately by a irqdevice
+ * implementation.
+ *
+ * Returns: (void)
+ */
+static inline void kvm_irqdevice_set_intr(struct kvm_irqdevice *dev,
+ kvm_irqpin_t pin)
+{
+ struct kvm_irqsink *sink = &dev->sink;
+ if (sink->set_intr)
+ sink->set_intr(sink, dev, pin);
+}
+
+#endif /* __IRQDEVICE_H */
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index 3289801..1c8af97 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -13,6 +13,7 @@
#include <linux/mm.h>
#include "vmx.h"
+#include "irqdevice.h"
#include <linux/kvm.h>
#include <linux/kvm_para.h>
@@ -160,6 +161,11 @@ struct vmcs {
struct kvm_vcpu;
+int kvm_user_irqdev_init(struct kvm_irqdevice *dev);
+int kvm_user_irqdev_save(struct kvm_irqdevice *this, void *data);
+int kvm_user_irqdev_restore(struct kvm_irqdevice *this, void *data);
+int kvm_userint_init(struct kvm_vcpu *vcpu);
+
/*
* x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
* 32-bit). The kvm_mmu structure abstracts the details of the current mmu
@@ -316,6 +322,18 @@ struct kvm_io_device *kvm_io_bus_find_dev(struct kvm_io_bus *bus, gpa_t addr);
void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
struct kvm_io_device *dev);
+#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
+
+/*
+ * structure for maintaining info for interrupting an executing VCPU
+ */
+struct kvm_vcpu_irq {
+ spinlock_t lock;
+ struct kvm_irqdevice dev;
+ int pending;
+ int deferred;
+};
+
struct kvm_vcpu {
struct kvm *kvm;
union {
@@ -328,9 +346,7 @@ struct kvm_vcpu {
u64 host_tsc;
struct kvm_run *run;
int interrupt_window_open;
- unsigned long irq_summary; /* bit vector: 1 per word in irq_pending */
-#define NR_IRQ_WORDS KVM_IRQ_BITMAP_SIZE(unsigned long)
- unsigned long irq_pending[NR_IRQ_WORDS];
+ struct kvm_vcpu_irq irq;
unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
unsigned long rip; /* needs vcpu_load_rsp_rip() */
@@ -408,6 +424,78 @@ struct kvm_vcpu {
struct kvm_cpuid_entry cpuid_entries[KVM_MAX_CPUID_ENTRIES];
};
+/*
+ * These two functions are helpers for determining if a standard interrupt
+ * is pending to replace the old "if (vcpu->irq_summary)" logic.
+ */
+
+/*
+ * Assumes lock already held
+ */
+static inline int __kvm_vcpu_irq_pending(struct kvm_vcpu *vcpu)
+{
+ int pending = vcpu->irq.pending;
+
+ if (vcpu->irq.deferred != -1)
+ __set_bit(kvm_irqpin_localint, &pending);
+
+ return pending;
+}
+
+static inline int kvm_vcpu_irq_pending(struct kvm_vcpu *vcpu)
+{
+ int ret = 0;
+ int flags;
+
+ spin_lock_irqsave(&vcpu->irq.lock, flags);
+ ret = __kvm_vcpu_irq_pending(vcpu);
+ spin_unlock_irqrestore(&vcpu->irq.lock, flags);
+
+ return ret;
+}
+
+/*
+ * Assumes lock already held
+ */
+static inline int kvm_vcpu_irq_pop(struct kvm_vcpu *vcpu,
+ struct kvm_irqack_data *data)
+{
+ int ret = 0;
+
+ if (vcpu->irq.deferred != -1) {
+ ret = kvm_irqdevice_ack(&vcpu->irq.dev, KVM_IRQACK_FLAG_PEEK,
+ data);
+ data->flags |= KVM_IRQACKDATA_VECTOR_VALID;
+ data->vector = vcpu->irq.deferred;
+ vcpu->irq.deferred = -1;
+ } else
+ ret = kvm_irqdevice_ack(&vcpu->irq.dev, 0, data);
+
+ /*
+ * If there are no more interrupts we must clear the status flag
+ */
+ if (!(data->flags & KVM_IRQACKDATA_VECTOR_PENDING))
+ __clear_bit(kvm_irqpin_localint, &vcpu->irq.pending);
+
+ return ret;
+}
+
+static inline void __kvm_vcpu_irq_push(struct kvm_vcpu *vcpu, int irq)
+{
+ BUG_ON(vcpu->irq.deferred != -1); /* We can only hold one deferred */
+
+ vcpu->irq.deferred = irq;
+}
+
+static inline void kvm_vcpu_irq_push(struct kvm_vcpu *vcpu, int irq)
+{
+ int flags;
+
+ spin_lock_irqsave(&vcpu->irq.lock, flags);
+ __kvm_vcpu_irq_push(vcpu, irq);
+ spin_unlock_irqrestore(&vcpu->irq.lock, flags);
+}
+
struct kvm_mem_alias {
gfn_t base_gfn;
unsigned long npages;
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 89b00e5..897b20f 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -323,6 +323,11 @@ static struct kvm *kvm_create_vm(void)
struct kvm_vcpu *vcpu = &kvm->vcpus[i];
mutex_init(&vcpu->mutex);
+
+ memset(&vcpu->irq, 0, sizeof(vcpu->irq));
+ spin_lock_init(&vcpu->irq.lock);
+ vcpu->irq.deferred = -1;
+
vcpu->cpu = -1;
vcpu->kvm = kvm;
vcpu->mmu.root_hpa = INVALID_PAGE;
@@ -390,6 +395,7 @@ static void kvm_free_vcpu(struct kvm_vcpu *vcpu)
vcpu_load(vcpu);
kvm_mmu_destroy(vcpu);
vcpu_put(vcpu);
+ kvm_irqdevice_destructor(&vcpu->irq.dev);
kvm_arch_ops->vcpu_free(vcpu);
free_page((unsigned long)vcpu->run);
vcpu->run = NULL;
@@ -2009,8 +2015,7 @@ static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
sregs->efer = vcpu->shadow_efer;
sregs->apic_base = vcpu->apic_base;
- memcpy(sregs->interrupt_bitmap, vcpu->irq_pending,
- sizeof sregs->interrupt_bitmap);
+ kvm_user_irqdev_save(&vcpu->irq.dev, &sregs->interrupt_bitmap);
vcpu_put(vcpu);
@@ -2027,7 +2032,6 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
struct kvm_sregs *sregs)
{
int mmu_reset_needed = 0;
- int i;
struct descriptor_table dt;
vcpu_load(vcpu);
@@ -2064,12 +2068,8 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
if (mmu_reset_needed)
kvm_mmu_reset_context(vcpu);
- memcpy(vcpu->irq_pending, sregs->interrupt_bitmap,
- sizeof vcpu->irq_pending);
- vcpu->irq_summary = 0;
- for (i = 0; i < NR_IRQ_WORDS; ++i)
- if (vcpu->irq_pending[i])
- __set_bit(i, &vcpu->irq_summary);
+ kvm_user_irqdev_restore(&vcpu->irq.dev,
+ &sregs->interrupt_bitmap[0]);
set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
@@ -2230,14 +2230,8 @@ static int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
{
if (irq->irq < 0 || irq->irq >= 256)
return -EINVAL;
- vcpu_load(vcpu);
-
- set_bit(irq->irq, vcpu->irq_pending);
- set_bit(irq->irq / BITS_PER_LONG, &vcpu->irq_summary);
- vcpu_put(vcpu);
-
- return 0;
+ return kvm_irqdevice_set_pin(&vcpu->irq.dev, irq->irq, 1);
}
static int kvm_vcpu_ioctl_debug_guest(struct kvm_vcpu *vcpu,
@@ -2339,6 +2333,32 @@ out1:
}
/*
+ * This function will be invoked whenever the vcpu->irq.dev raises its INTR
+ * line
+ */
+static void kvm_vcpu_intr(struct kvm_irqsink *this,
+ struct kvm_irqdevice *dev,
+ kvm_irqpin_t pin)
+{
+ struct kvm_vcpu *vcpu = (struct kvm_vcpu*)this->private;
+ unsigned long flags;
+
+ spin_lock_irqsave(&vcpu->irq.lock, flags);
+ __set_bit(pin, &vcpu->irq.pending);
+ spin_unlock_irqrestore(&vcpu->irq.lock, flags);
+}
+
+static void kvm_vcpu_irqsink_init(struct kvm_vcpu *vcpu)
+{
+ struct kvm_irqsink sink = {
+ .set_intr = kvm_vcpu_intr,
+ .private = vcpu
+ };
+
+ kvm_irqdevice_register_sink(&vcpu->irq.dev, &sink);
+}
+
+/*
* Creates some virtual cpus. Good luck creating more than one.
*/
static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
@@ -2385,6 +2405,12 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
if (r < 0)
goto out_free_vcpus;
+ kvm_irqdevice_init(&vcpu->irq.dev);
+ kvm_vcpu_irqsink_init(vcpu);
+ r = kvm_userint_init(vcpu);
+ if (r < 0)
+ goto out_free_vcpus;
+
kvm_arch_ops->vcpu_load(vcpu);
r = kvm_mmu_setup(vcpu);
if (r >= 0)
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index b621403..a9d917a 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -106,24 +106,6 @@ static unsigned get_addr_size(struct kvm_vcpu *vcpu)
(cs_attrib & SVM_SELECTOR_DB_MASK) ? 4 : 2;
}
-static inline u8 pop_irq(struct kvm_vcpu *vcpu)
-{
- int word_index = __ffs(vcpu->irq_summary);
- int bit_index = __ffs(vcpu->irq_pending[word_index]);
- int irq = word_index * BITS_PER_LONG + bit_index;
-
- clear_bit(bit_index, &vcpu->irq_pending[word_index]);
- if (!vcpu->irq_pending[word_index])
- clear_bit(word_index, &vcpu->irq_summary);
- return irq;
-}
-
-static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
-{
- set_bit(irq, vcpu->irq_pending);
- set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
-}
-
static inline void clgi(void)
{
asm volatile (SVM_CLGI);
@@ -904,7 +886,12 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
int r;
if (is_external_interrupt(exit_int_info))
- push_irq(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
+ /*
+ * An exception was taken while we were trying to inject an
+ * IRQ. We must defer the injection of the vector until
+ * the next window.
+ */
+ kvm_vcpu_irq_push(vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
spin_lock(&vcpu->kvm->lock);
@@ -1114,7 +1101,7 @@ static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
skip_emulated_instruction(vcpu);
- if (vcpu->irq_summary)
+ if (kvm_vcpu_irq_pending(vcpu))
return 1;
kvm_run->exit_reason = KVM_EXIT_HLT;
@@ -1285,7 +1272,7 @@ static int interrupt_window_interception(struct kvm_vcpu *vcpu,
* possible
*/
if (kvm_run->request_interrupt_window &&
- !vcpu->irq_summary) {
+ !kvm_vcpu_irq_pending(vcpu)) {
++vcpu->stat.irq_window_exits;
kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
return 0;
@@ -1384,60 +1371,135 @@ static void pre_svm_run(struct kvm_vcpu *vcpu)
}
-static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
-{
- struct vmcb_control_area *control;
-
- control = &vcpu->svm->vmcb->control;
- control->int_vector = pop_irq(vcpu);
- control->int_ctl &= ~V_INTR_PRIO_MASK;
- control->int_ctl |= V_IRQ_MASK |
- ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
-}
-
static void kvm_reput_irq(struct kvm_vcpu *vcpu)
{
struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
if (control->int_ctl & V_IRQ_MASK) {
control->int_ctl &= ~V_IRQ_MASK;
- push_irq(vcpu, control->int_vector);
+ kvm_vcpu_irq_push(vcpu, control->int_vector);
}
vcpu->interrupt_window_open =
!(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
}
-static void do_interrupt_requests(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
+static void do_intr_requests(struct kvm_vcpu *vcpu,
+ struct kvm_run *kvm_run,
+ kvm_irqpin_t pin)
{
struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
+ int pending = 0;
vcpu->interrupt_window_open =
(!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
- if (vcpu->interrupt_window_open && vcpu->irq_summary)
+ if (vcpu->interrupt_window_open) {
/*
- * If interrupts enabled, and not blocked by sti or mov ss. Good.
+ * If interrupts enabled, and not blocked by sti or mov ss.
+ * Good.
*/
- kvm_do_inject_irq(vcpu);
+ struct kvm_irqack_data ack;
+ int r = 0;
+
+ memset(&ack, 0, sizeof(ack));
+
+ switch (pin) {
+ case kvm_irqpin_localint:
+ r = kvm_vcpu_irq_pop(vcpu, &ack);
+ break;
+ case kvm_irqpin_extint:
+ printk(KERN_WARNING "KVM: external-interrupts not " \
+ "handled yet\n");
+ __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ case kvm_irqpin_nmi:
+ /*
+ * FIXME: Someday we will handle this using the
+ * specific SVN NMI features. For now, just inject
+ * the NMI as a standard interrupt on vector 2
+ */
+ ack.flags |= KVM_IRQACKDATA_VECTOR_VALID;
+ ack.vector = 2;
+ __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ default:
+ panic("KVM: unknown interrupt pin raised: %d\n", pin);
+ break;
+ }
+
+ BUG_ON(r < 0);
+
+ if (ack.flags & KVM_IRQACKDATA_VECTOR_VALID) {
+ control = &vcpu->svm->vmcb->control;
+ control->int_vector = ack.vector;
+ control->int_ctl &= ~V_INTR_PRIO_MASK;
+ control->int_ctl |= V_IRQ_MASK |
+ ((/*control->int_vector >> 4*/ 0xf) <<
+ V_INTR_PRIO_SHIFT);
+ }
+ }
/*
- * Interrupts blocked. Wait for unblock.
+ * Re-read the pending interrupt state. If anything is still
+ * pending we need to cause an exit on the next window
*/
- if (!vcpu->interrupt_window_open &&
- (vcpu->irq_summary || kvm_run->request_interrupt_window)) {
+ pending = __kvm_vcpu_irq_pending(vcpu);
+
+ if (test_bit(pin, &pending) || kvm_run->request_interrupt_window)
+ /*
+ * Trigger a VMEXIT on the next IRQ window
+ */
control->intercept |= 1ULL << INTERCEPT_VINTR;
- } else
- control->intercept &= ~(1ULL << INTERCEPT_VINTR);
+}
+
+static void clear_pending_controls(struct kvm_vcpu *vcpu)
+{
+ struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
+
+ control->intercept &= ~(1ULL << INTERCEPT_VINTR);
+}
+
+static void do_interrupt_requests(struct kvm_vcpu *vcpu,
+ struct kvm_run *kvm_run)
+{
+ int pending = __kvm_vcpu_irq_pending(vcpu);
+
+ clear_pending_controls(vcpu);
+
+ while (pending) {
+ kvm_irqpin_t pin = __fls(pending);
+
+ switch (pin) {
+ case kvm_irqpin_localint:
+ case kvm_irqpin_extint:
+ case kvm_irqpin_nmi:
+ do_intr_requests(vcpu, kvm_run, pin);
+ break;
+ case kvm_irqpin_smi:
+ /* ignored (for now) */
+ printk(KERN_WARNING "KVM: dropping unhandled SMI\n");
+ __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ case kvm_irqpin_invalid:
+ /* drop */
+ break;
+ default:
+ panic("KVM: unknown interrupt pin raised: %d\n", pin);
+ break;
+ }
+
+ __clear_bit(pin, &pending);
+ }
}
static void post_kvm_run_save(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
- kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
- vcpu->irq_summary == 0);
+ kvm_run->ready_for_interrupt_injection =
+ (vcpu->interrupt_window_open &&
+ !kvm_vcpu_irq_pending(vcpu));
kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
kvm_run->cr8 = vcpu->cr8;
kvm_run->apic_base = vcpu->apic_base;
@@ -1452,7 +1514,7 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu,
static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
- return (!vcpu->irq_summary &&
+ return (!kvm_vcpu_irq_pending(vcpu) &&
kvm_run->request_interrupt_window &&
vcpu->interrupt_window_open &&
(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
@@ -1482,9 +1544,17 @@ static int svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
int r;
again:
+ spin_lock(&vcpu->irq.lock);
+
+ /*
+ * We must inject interrupts (if any) while the irq_lock
+ * is held
+ */
if (!vcpu->mmio_read_completed)
do_interrupt_requests(vcpu, kvm_run);
+ spin_unlock(&vcpu->irq.lock);
+
clgi();
pre_svm_run(vcpu);
diff --git a/drivers/kvm/userint.c b/drivers/kvm/userint.c
new file mode 100644
index 0000000..a60707d
--- /dev/null
+++ b/drivers/kvm/userint.c
@@ -0,0 +1,223 @@
+/*
+ * User Interrupts IRQ device
+ *
+ * This acts as an extention of an interrupt controller that exists elsewhere
+ * (typically in userspace/QEMU). Because this PIC is a pseudo device that
+ * is downstream from a real emulated PIC, the "IRQ-to-vector" mapping has
+ * already occured. Therefore, this PIC has the following unusal properties:
+ *
+ * 1) It has 256 "pins" which are literal vectors (i.e. no translation)
+ * 2) It only supports "auto-EOI" behavior since it is expected that the
+ * upstream emulated PIC will handle the real EOIs (if applicable)
+ * 3) It only listens to "asserts" on the pins (deasserts are dropped)
+ * because its an auto-EOI device anyway.
+ *
+ * Copyright (C) 2007 Novell
+ *
+ * bitarray code based on original vcpu->irq_pending code,
+ * Copyright (C) 2007 Qumranet
+ *
+ * Authors:
+ * Gregory Haskins <ghaskins-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "kvm.h"
+
+/*
+ *----------------------------------------------------------------------
+ * optimized bitarray object - works like bitarrays in bitops, but uses
+ * a summary field to accelerate lookups. Assumes external locking
+ *---------------------------------------------------------------------
+ */
+
+struct bitarray {
+ unsigned long summary; /* 1 per word in pending */
+ unsigned long pending[NR_IRQ_WORDS];
+};
+
+static inline int bitarray_pending(struct bitarray *this)
+{
+ return this->summary ? 1 : 0;
+}
+
+static inline int bitarray_findhighest(struct bitarray *this)
+{
+ if (!this->summary)
+ return -1;
+ else {
+ int word_index = __fls(this->summary);
+ int bit_index = __fls(this->pending[word_index]);
+
+ return word_index * BITS_PER_LONG + bit_index;
+ }
+}
+
+static inline void bitarray_set(struct bitarray *this, int nr)
+{
+ __set_bit(nr, &this->pending);
+ __set_bit(nr / BITS_PER_LONG, &this->summary);
+}
+
+static inline void bitarray_clear(struct bitarray *this, int nr)
+{
+ int word = nr / BITS_PER_LONG;
+
+ __clear_bit(nr, &this->pending);
+ if (!this->pending[word])
+ __clear_bit(word, &this->summary);
+}
+
+static inline int bitarray_test(struct bitarray *this, int nr)
+{
+ return test_bit(nr, &this->pending);
+}
+
+static inline int bitarray_test_and_set(struct bitarray *this, int nr, int val)
+{
+ if (bitarray_test(this, nr) != val) {
+ if (val)
+ bitarray_set(this, nr);
+ else
+ bitarray_clear(this, nr);
+ return 1;
+ }
+
+ return 0;
+}
+
+/*
+ *----------------------------------------------------------------------
+ * userint interface - provides the actual kvm_irqdevice implementation
+ *---------------------------------------------------------------------
+ */
+
+struct kvm_user_irqdev {
+ spinlock_t lock;
+ atomic_t ref_count;
+ struct bitarray pending;
+};
+
+static int user_irqdev_ack(struct kvm_irqdevice *this, int flags,
+ struct kvm_irqack_data *data)
+{
+ struct kvm_user_irqdev *s = (struct kvm_user_irqdev*)this->private;
+
+ spin_lock(&s->lock);
+
+ if (!(flags & KVM_IRQACK_FLAG_PEEK)) {
+ int irq = bitarray_findhighest(&s->pending);
+
+ if (irq > -1) {
+ /*
+ * Automatically clear the interrupt as the EOI
+ * mechanism (if any) will take place in userspace
+ */
+ bitarray_clear(&s->pending, irq);
+
+ data->flags |= KVM_IRQACKDATA_VECTOR_VALID;
+ }
+
+ data->vector = irq;
+ }
+
+ if (bitarray_pending(&s->pending))
+ data->flags |= KVM_IRQACKDATA_VECTOR_PENDING;
+
+ spin_unlock(&s->lock);
+
+ return 0;
+}
+
+static int user_irqdev_set_pin(struct kvm_irqdevice *this, int irq, int level)
+{
+ struct kvm_user_irqdev *s = (struct kvm_user_irqdev*)this->private;
+ int forward = 0;
+
+ spin_lock(&s->lock);
+ forward = bitarray_test_and_set(&s->pending, irq, level);
+ spin_unlock(&s->lock);
+
+ /*
+ * alert the higher layer software we have changes
+ */
+ if (forward)
+ kvm_irqdevice_set_intr(this, kvm_irqpin_localint);
+
+ return 0;
+}
+
+static void user_irqdev_destructor(struct kvm_irqdevice *this)
+{
+ struct kvm_user_irqdev *s = (struct kvm_user_irqdev*)this->private;
+
+ if (atomic_dec_and_test(&s->ref_count))
+ kfree(s);
+}
+
+int kvm_user_irqdev_init(struct kvm_irqdevice *irqdev)
+{
+ struct kvm_user_irqdev *s;
+
+ s = kzalloc(sizeof(*s), GFP_KERNEL);
+ if (!s)
+ return -ENOMEM;
+
+ spin_lock_init(&s->lock);
+
+ irqdev->ack = user_irqdev_ack;
+ irqdev->set_pin = user_irqdev_set_pin;
+ irqdev->destructor = user_irqdev_destructor;
+
+ irqdev->private = s;
+ atomic_inc(&s->ref_count);
+
+ return 0;
+}
+
+int kvm_user_irqdev_save(struct kvm_irqdevice *this, void *data)
+{
+ struct kvm_user_irqdev *s = (struct kvm_user_irqdev*)this->private;
+
+ spin_lock(&s->lock);
+ memcpy(data, s->pending.pending, sizeof s->pending.pending);
+ spin_unlock(&s->lock);
+
+ return 0;
+}
+
+int kvm_user_irqdev_restore(struct kvm_irqdevice *this, void *data)
+{
+ struct kvm_user_irqdev *s = (struct kvm_user_irqdev*)this->private;
+ int i;
+ int forward = 0;
+
+ spin_lock(&s->lock);
+
+ /*
+ * walk the interrupt-bitmap and inject an IRQ for each bit found
+ */
+ for (i = 0; i < 256; ++i) {
+ int val = test_bit(i, data);
+ forward |= bitarray_test_and_set(&s->pending, i, val);
+ }
+
+ spin_unlock(&s->lock);
+
+ /*
+ * alert the higher layer software we have changes
+ */
+ if (forward)
+ kvm_irqdevice_set_intr(this, kvm_irqpin_localint);
+
+ return 0;
+}
+
+int kvm_userint_init(struct kvm_vcpu *vcpu)
+{
+ return kvm_user_irqdev_init(&vcpu->irq.dev);
+}
+
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 3411813..f0e5826 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1454,52 +1454,118 @@ static void inject_rmode_irq(struct kvm_vcpu *vcpu, int irq)
vmcs_writel(GUEST_RSP, (vmcs_readl(GUEST_RSP) & ~0xffff) | (sp - 6));
}
-static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
+static void do_intr_requests(struct kvm_vcpu *vcpu,
+ struct kvm_run *kvm_run,
+ kvm_irqpin_t pin)
{
- int word_index = __ffs(vcpu->irq_summary);
- int bit_index = __ffs(vcpu->irq_pending[word_index]);
- int irq = word_index * BITS_PER_LONG + bit_index;
-
- clear_bit(bit_index, &vcpu->irq_pending[word_index]);
- if (!vcpu->irq_pending[word_index])
- clear_bit(word_index, &vcpu->irq_summary);
-
- if (vcpu->rmode.active) {
- inject_rmode_irq(vcpu, irq);
- return;
- }
- vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
- irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
-}
-
-
-static void do_interrupt_requests(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- u32 cpu_based_vm_exec_control;
+ int pending = 0;
vcpu->interrupt_window_open =
((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
(vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);
if (vcpu->interrupt_window_open &&
- vcpu->irq_summary &&
- !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK))
+ !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK)) {
/*
- * If interrupts enabled, and not blocked by sti or mov ss. Good.
+ * If interrupts enabled, and not blocked by sti or mov ss.
+ * Good.
*/
- kvm_do_inject_irq(vcpu);
+ struct kvm_irqack_data ack;
+ int r = 0;
+
+ memset(&ack, 0, sizeof(ack));
+
+ switch (pin) {
+ case kvm_irqpin_localint:
+ r = kvm_vcpu_irq_pop(vcpu, &ack);
+ break;
+ case kvm_irqpin_extint:
+ printk(KERN_WARNING "KVM: external-interrupts not " \
+ "handled yet\n");
+ __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ case kvm_irqpin_nmi:
+ /*
+ * FIXME: Someday we will handle this using the
+ * specific VMX NMI features. For now, just inject
+ * the NMI as a standard interrupt on vector 2
+ */
+ ack.flags |= KVM_IRQACKDATA_VECTOR_VALID;
+ ack.vector = 2;
+ __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ default:
+ panic("KVM: unknown interrupt pin raised: %d\n", pin);
+ break;
+ }
+
+ BUG_ON(r < 0);
- cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
- if (!vcpu->interrupt_window_open &&
- (vcpu->irq_summary || kvm_run->request_interrupt_window))
+ if (ack.flags & KVM_IRQACKDATA_VECTOR_VALID) {
+ if (vcpu->rmode.active)
+ inject_rmode_irq(vcpu, ack.vector);
+ else
+ vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
+ ack.vector |
+ INTR_TYPE_EXT_INTR |
+ INTR_INFO_VALID_MASK);
+ }
+ }
+
+ /*
+ * Re-read the pending interrupt state. If anything is still
+ * pending we need to cause an exit on the next window
+ */
+ pending = __kvm_vcpu_irq_pending(vcpu);
+
+ if (test_bit(pin, &pending) || kvm_run->request_interrupt_window) {
/*
- * Interrupts blocked. Wait for unblock.
+ * Trigger a VMEXIT on the next IRQ window
*/
- cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
- else
- cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
- vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
+ u32 cbvec = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
+ cbvec |= CPU_BASED_VIRTUAL_INTR_PENDING;
+ vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cbvec);
+ }
+}
+
+static void clear_pending_controls(struct kvm_vcpu *vcpu)
+{
+ u32 cbvec = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
+ cbvec &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
+ vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cbvec);
+}
+
+static void do_interrupt_requests(struct kvm_vcpu *vcpu,
+ struct kvm_run *kvm_run)
+{
+ int pending = __kvm_vcpu_irq_pending(vcpu);
+
+ clear_pending_controls(vcpu);
+
+ while (pending) {
+ kvm_irqpin_t pin = __fls(pending);
+
+ switch (pin) {
+ case kvm_irqpin_localint:
+ case kvm_irqpin_extint:
+ case kvm_irqpin_nmi:
+ do_intr_requests(vcpu, kvm_run, pin);
+ break;
+ case kvm_irqpin_smi:
+ /* ignored (for now) */
+ printk(KERN_WARNING "KVM: dropping unhandled SMI\n");
+ __clear_bit(pin, &vcpu->irq.pending);
+ break;
+ case kvm_irqpin_invalid:
+ /* drop */
+ break;
+ default:
+ panic("KVM: unknown interrupt pin raised: %d\n", pin);
+ break;
+ }
+
+ __clear_bit(pin, &pending);
+ }
}
static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu)
@@ -1554,9 +1620,13 @@ static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
}
if (is_external_interrupt(vect_info)) {
+ /*
+ * An exception was taken while we were trying to inject an
+ * IRQ. We must defer the injection of the vector until
+ * the next window.
+ */
int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
- set_bit(irq, vcpu->irq_pending);
- set_bit(irq / BITS_PER_LONG, &vcpu->irq_summary);
+ kvm_vcpu_irq_push(vcpu, irq);
}
if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) { /* nmi */
@@ -1872,8 +1942,9 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu,
kvm_run->if_flag = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) != 0;
kvm_run->cr8 = vcpu->cr8;
kvm_run->apic_base = vcpu->apic_base;
- kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
- vcpu->irq_summary == 0);
+ kvm_run->ready_for_interrupt_injection =
+ (vcpu->interrupt_window_open &&
+ !kvm_vcpu_irq_pending(vcpu));
}
static int handle_interrupt_window(struct kvm_vcpu *vcpu,
@@ -1884,7 +1955,7 @@ static int handle_interrupt_window(struct kvm_vcpu *vcpu,
* possible
*/
if (kvm_run->request_interrupt_window &&
- !vcpu->irq_summary) {
+ !kvm_vcpu_irq_pending(vcpu)) {
kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
++vcpu->stat.irq_window_exits;
return 0;
@@ -1895,7 +1966,7 @@ static int handle_interrupt_window(struct kvm_vcpu *vcpu,
static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
skip_emulated_instruction(vcpu);
- if (vcpu->irq_summary)
+ if (kvm_vcpu_irq_pending(vcpu))
return 1;
kvm_run->exit_reason = KVM_EXIT_HLT;
@@ -1965,7 +2036,7 @@ static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
- return (!vcpu->irq_summary &&
+ return (!kvm_vcpu_irq_pending(vcpu) &&
kvm_run->request_interrupt_window &&
vcpu->interrupt_window_open &&
(vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF));
@@ -1981,9 +2052,17 @@ preempted:
kvm_guest_debug_pre(vcpu);
again:
+ spin_lock(&vcpu->irq.lock);
+
+ /*
+ * We must inject interrupts (if any) while the irq.lock
+ * is held
+ */
if (!vcpu->mmio_read_completed)
do_interrupt_requests(vcpu, kvm_run);
+ spin_unlock(&vcpu->irq.lock);
+
vmx_save_host_state(vcpu);
kvm_load_guest_fpu(vcpu);
-------------------------------------------------------------------------
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^ permalink raw reply related [flat|nested] 16+ messages in thread* [PATCH 5/9] KVM: Add support for in-kernel LAPIC model
[not found] ` <20070524131917.11321.17746.stgit-sLgBBP33vUGnsjUZhwzVf9HuzzzSOjJt@public.gmane.org>
` (3 preceding siblings ...)
2007-05-24 13:23 ` [PATCH 4/9] KVM: Adds ability to preempt an executing VCPU Gregory Haskins
@ 2007-05-24 13:23 ` Gregory Haskins
2007-05-24 13:23 ` [PATCH 6/9] KVM: Adds support for real NMI injection on VMX processors Gregory Haskins
` (4 subsequent siblings)
9 siblings, 0 replies; 16+ messages in thread
From: Gregory Haskins @ 2007-05-24 13:23 UTC (permalink / raw)
To: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f
Signed-off-by: Gregory Haskins <ghaskins-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
---
drivers/kvm/Makefile | 2
drivers/kvm/kernint.c | 149 +++++
drivers/kvm/kvm.h | 35 +
drivers/kvm/kvm_main.c | 198 ++++++-
drivers/kvm/lapic.c | 1418 ++++++++++++++++++++++++++++++++++++++++++++++++
drivers/kvm/svm.c | 13
drivers/kvm/userint.c | 8
drivers/kvm/vmx.c | 16 -
include/linux/kvm.h | 15 +
9 files changed, 1809 insertions(+), 45 deletions(-)
diff --git a/drivers/kvm/Makefile b/drivers/kvm/Makefile
index 540afbc..1aad737 100644
--- a/drivers/kvm/Makefile
+++ b/drivers/kvm/Makefile
@@ -2,7 +2,7 @@
# Makefile for Kernel-based Virtual Machine module
#
-kvm-objs := kvm_main.o mmu.o x86_emulate.o userint.o
+kvm-objs := kvm_main.o mmu.o x86_emulate.o userint.o lapic.o kernint.o
obj-$(CONFIG_KVM) += kvm.o
kvm-intel-objs = vmx.o
obj-$(CONFIG_KVM_INTEL) += kvm-intel.o
diff --git a/drivers/kvm/kernint.c b/drivers/kvm/kernint.c
new file mode 100644
index 0000000..b5cbcae
--- /dev/null
+++ b/drivers/kvm/kernint.c
@@ -0,0 +1,149 @@
+/*
+ * Kernel Interrupt IRQ device
+ *
+ * Provides a model for connecting in-kernel interrupt resources to a VCPU.
+ *
+ * A typical modern x86 processor has the concept of an internal Local-APIC
+ * and some external signal pins. The way in which interrupts are injected is
+ * dependent on whether software enables the LAPIC or not. When enabled,
+ * interrupts are acknowledged through the LAPIC. Otherwise they are through
+ * an externally connected PIC (typically an i8259 on the BSP)
+ *
+ * Copyright (C) 2007 Novell
+ *
+ * Authors:
+ * Gregory Haskins <ghaskins-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#include "kvm.h"
+
+struct kvm_kernint {
+ struct kvm_vcpu *vcpu;
+ struct kvm_irqdevice *self_irq;
+ struct kvm_irqdevice *ext_irq;
+ struct kvm_irqdevice apic_irq;
+
+};
+
+static struct kvm_irqdevice *get_irq_dev(struct kvm_kernint *s)
+{
+ struct kvm_irqdevice *dev;
+
+ if (kvm_lapic_enabled(s->vcpu))
+ dev = &s->apic_irq;
+ else
+ dev = s->ext_irq;
+
+ if (!dev)
+ kvm_crash_guest(s->vcpu->kvm);
+
+ return dev;
+}
+
+static int kernint_irqdev_ack(struct kvm_irqdevice *this, int flags,
+ struct kvm_irqack_data *data)
+{
+ struct kvm_kernint *s = (struct kvm_kernint*)this->private;
+
+ return kvm_irqdevice_ack(get_irq_dev(s), flags, data);
+}
+
+static int kernint_irqdev_set_pin(struct kvm_irqdevice *this,
+ int irq, int level)
+{
+ /* no-op */
+ return 0;
+}
+
+static void kernint_irqdev_destructor(struct kvm_irqdevice *this)
+{
+ struct kvm_kernint *s = (struct kvm_kernint*)this->private;
+
+ kvm_irqdevice_destructor(&s->apic_irq);
+ kvm_lapic_destroy(s->vcpu);
+ kfree(s);
+}
+
+static void kvm_apic_intr(struct kvm_irqsink *this,
+ struct kvm_irqdevice *dev,
+ kvm_irqpin_t pin)
+{
+ struct kvm_kernint *s = (struct kvm_kernint*)this->private;
+
+ /*
+ * If the LAPIC sent us an interrupt it *must* be enabled,
+ * just forward it on to the CPU
+ */
+ kvm_irqdevice_set_intr(s->self_irq, pin);
+}
+
+static void kvm_ext_intr(struct kvm_irqsink *this,
+ struct kvm_irqdevice *dev,
+ kvm_irqpin_t pin)
+{
+ struct kvm_kernint *s = (struct kvm_kernint*)this->private;
+
+ /*
+ * If the EXTINT device sent us an interrupt, forward it to the LINT0
+ * pin of the LAPIC
+ */
+ if (pin != kvm_irqpin_localint)
+ return;
+
+ /*
+ * "irq 0" = LINT0, 1 = LINT1
+ */
+ kvm_irqdevice_set_pin(&s->apic_irq, 0, 1);
+}
+
+int kvm_kernint_init(struct kvm_vcpu *vcpu)
+{
+ struct kvm_irqdevice *irqdev = &vcpu->irq.dev;
+ struct kvm_kernint *s;
+ struct kvm_irqsink apicsink;
+
+ s = kzalloc(sizeof(*s), GFP_KERNEL);
+ if (!s)
+ return -ENOMEM;
+
+ s->vcpu = vcpu;
+
+ /*
+ * Configure the irqdevice interface
+ */
+ irqdev->ack = kernint_irqdev_ack;
+ irqdev->set_pin = kernint_irqdev_set_pin;
+ irqdev->destructor = kernint_irqdev_destructor;
+
+ irqdev->private = s;
+ s->self_irq = irqdev;
+
+ /*
+ * Configure the EXTINT device if this is the BSP processor
+ */
+ if (!vcpu_slot(vcpu)) {
+ struct kvm_irqsink extsink = {
+ .set_intr = kvm_ext_intr,
+ .private = s
+ };
+ s->ext_irq = &vcpu->kvm->isa_irq;
+ kvm_irqdevice_register_sink(s->ext_irq, &extsink);
+ }
+
+ /*
+ * Configure the LAPIC device
+ */
+ apicsink.set_intr = kvm_apic_intr;
+ apicsink.private = s;
+
+ kvm_irqdevice_init(&s->apic_irq);
+ kvm_irqdevice_register_sink(&s->apic_irq, &apicsink);
+ kvm_lapic_init(vcpu, &s->apic_irq, 0);
+
+ return 0;
+}
+
diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h
index b6db256..3065a1b 100644
--- a/drivers/kvm/kvm.h
+++ b/drivers/kvm/kvm.h
@@ -165,6 +165,21 @@ int kvm_user_irqdev_init(struct kvm_irqdevice *dev);
int kvm_user_irqdev_save(struct kvm_irqdevice *this, void *data);
int kvm_user_irqdev_restore(struct kvm_irqdevice *this, void *data);
int kvm_userint_init(struct kvm_vcpu *vcpu);
+int kvm_kernint_init(struct kvm_vcpu *vcpu);
+
+#define KVM_LAPIC_OPTION_USERMODE (1 << 0)
+
+int kvm_lapic_init(struct kvm_vcpu *vcpu, struct kvm_irqdevice *dev,
+ int flags);
+void kvm_lapic_destroy(struct kvm_vcpu *vcpu);
+void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, u64 cr8);
+u64 kvm_lapic_get_tpr(struct kvm_vcpu *vcpu);
+void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 base);
+u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu);
+void kvm_lapic_save(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
+void kvm_lapic_restore(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs);
+void kvm_lapic_reset(struct kvm_vcpu *vcpu);
+int kvm_lapic_enabled(struct kvm_vcpu *vcpu);
/*
* x86 supports 3 paging modes (4-level 64-bit, 3-level 64-bit, and 2-level
@@ -335,6 +350,11 @@ struct kvm_vcpu_irq {
int guest_cpu;
};
+struct kvm_lapic {
+ void *dev;
+ struct kvm_io_device *mmio;
+};
+
struct kvm_vcpu {
struct kvm *kvm;
union {
@@ -348,6 +368,7 @@ struct kvm_vcpu {
struct kvm_run *run;
int interrupt_window_open;
struct kvm_vcpu_irq irq;
+ struct kvm_lapic apic;
unsigned long regs[NR_VCPU_REGS]; /* for rsp: vcpu_load_rsp_rip() */
unsigned long rip; /* needs vcpu_load_rsp_rip() */
@@ -358,10 +379,8 @@ struct kvm_vcpu {
struct page *para_state_page;
gpa_t hypercall_gpa;
unsigned long cr4;
- unsigned long cr8;
u64 pdptrs[4]; /* pae */
u64 shadow_efer;
- u64 apic_base;
u64 ia32_misc_enable_msr;
int nmsrs;
int save_nmsrs;
@@ -530,6 +549,8 @@ struct kvm {
struct list_head vm_list;
struct file *filp;
struct kvm_io_bus mmio_bus;
+ int enable_kernel_pic;
+ struct kvm_irqdevice isa_irq;
};
struct descriptor_table {
@@ -604,6 +625,9 @@ void kvm_exit_arch(void);
int kvm_mmu_module_init(void);
void kvm_mmu_module_exit(void);
+int kvm_apicbus_send(struct kvm *kvm, int dest, int trig_mode, int level,
+ int dest_mode, int delivery_mode, int vector);
+
void kvm_mmu_destroy(struct kvm_vcpu *vcpu);
int kvm_mmu_create(struct kvm_vcpu *vcpu);
int kvm_mmu_setup(struct kvm_vcpu *vcpu);
@@ -737,6 +761,13 @@ static inline struct kvm_mmu_page *page_header(hpa_t shadow_page)
return (struct kvm_mmu_page *)page_private(page);
}
+static inline int vcpu_slot(struct kvm_vcpu *vcpu)
+{
+ return vcpu - vcpu->kvm->vcpus;
+}
+
+void kvm_crash_guest(struct kvm *kvm);
+
static inline u16 read_fs(void)
{
u16 seg;
diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 2929d1a..6fd335e 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -319,6 +319,7 @@ static struct kvm *kvm_create_vm(void)
spin_lock_init(&kvm->lock);
INIT_LIST_HEAD(&kvm->active_mmu_pages);
kvm_io_bus_init(&kvm->mmio_bus);
+ kvm_irqdevice_init(&kvm->isa_irq);
for (i = 0; i < KVM_MAX_VCPUS; ++i) {
struct kvm_vcpu *vcpu = &kvm->vcpus[i];
@@ -412,6 +413,23 @@ static void kvm_free_vcpus(struct kvm *kvm)
kvm_free_vcpu(&kvm->vcpus[i]);
}
+/*
+ * The function kills a guest while there still is a user space processes
+ * with a descriptor to it
+ */
+void kvm_crash_guest(struct kvm *kvm)
+{
+ unsigned int i;
+
+ for (i = 0; i < KVM_MAX_VCPUS; ++i) {
+ /*
+ * FIXME: in the future it should send IPI to gracefully
+ * stop the other vCPUs
+ */
+ kvm_free_vcpu(&kvm->vcpus[i]);
+ }
+}
+
static int kvm_dev_release(struct inode *inode, struct file *filp)
{
return 0;
@@ -423,6 +441,8 @@ static void kvm_destroy_vm(struct kvm *kvm)
list_del(&kvm->vm_list);
spin_unlock(&kvm_lock);
kvm_io_bus_destroy(&kvm->mmio_bus);
+ if (kvm->enable_kernel_pic)
+ kvm_irqdevice_destructor(&kvm->isa_irq);
kvm_free_vcpus(kvm);
kvm_free_physmem(kvm);
kfree(kvm);
@@ -628,7 +648,7 @@ void set_cr8(struct kvm_vcpu *vcpu, unsigned long cr8)
inject_gp(vcpu);
return;
}
- vcpu->cr8 = cr8;
+ kvm_lapic_set_tpr(vcpu, cr8);
}
EXPORT_SYMBOL_GPL(set_cr8);
@@ -929,6 +949,69 @@ out:
return r;
}
+static int kvm_vm_ioctl_enable_kernel_pic(struct kvm *kvm, __u32 val)
+{
+ /*
+ * FIXME: We should not allow this if VCPUs have already been created
+ */
+ if (kvm->enable_kernel_pic)
+ return -EINVAL;
+
+ /*
+ * Someday we may offer two levels of in-kernel PIC support:
+ *
+ * level 0 = (default) compatiblity mode (everything in userspace)
+ * level 1 = LAPIC in kernel, IOAPIC/i8259 in userspace
+ * level 2 = All three in kernel
+ *
+ * For now we only support level 0 and 1. However, you cant set
+ * level 0
+ */
+ if (val != 1)
+ return -EINVAL;
+
+ kvm->enable_kernel_pic = val;
+
+ printk(KERN_INFO "KVM: Setting in-kernel PIC level to %d\n", val);
+
+ /*
+ * installing a user_irqdev model to the kvm->isa_irq device
+ * creates a level-1 environment, where the userspace completely
+ * controls the ISA domain interrupts in the IOAPIC/i8259.
+ * Interrupts come down to the VCPU either as an ISA vector to
+ * this controller, or as an APIC bus message (or both)
+ */
+ kvm_user_irqdev_init(&kvm->isa_irq);
+
+ return 0;
+}
+
+static int kvm_vm_ioctl_isa_interrupt(struct kvm *kvm,
+ struct kvm_interrupt *irq)
+{
+ if (irq->irq < 0 || irq->irq >= 256)
+ return -EINVAL;
+
+ if (!kvm->enable_kernel_pic)
+ return -EINVAL;
+
+ return kvm_irqdevice_set_pin(&kvm->isa_irq, irq->irq, 1);
+}
+
+static int kvm_vm_ioctl_apic_msg(struct kvm *kvm,
+ struct kvm_apic_msg *msg)
+{
+ if (!kvm->enable_kernel_pic)
+ return -EINVAL;
+
+ msg->delivery_mode = (msg->delivery_mode << 8) & 0xF00;
+
+ kvm_apicbus_send(kvm, msg->dest, msg->trig_mode, 1, msg->dest_mode,
+ msg->delivery_mode, msg->vector);
+
+ return 0;
+}
+
static gfn_t unalias_gfn(struct kvm *kvm, gfn_t gfn)
{
int i;
@@ -1049,10 +1132,16 @@ static int emulator_write_std(unsigned long addr,
static struct kvm_io_device *vcpu_find_mmio_dev(struct kvm_vcpu *vcpu,
gpa_t addr)
{
+ struct kvm_io_device *dev = vcpu->apic.mmio;
+
+ /*
+ * First check if the LAPIC will snarf this request
+ */
+ if (dev && dev->in_range(dev, addr))
+ return dev;
+
/*
- * Note that its important to have this wrapper function because
- * in the very near future we will be checking for MMIOs against
- * the LAPIC as well as the general MMIO bus
+ * And then fallback to allow any device to participate
*/
return kvm_io_bus_find_dev(&vcpu->kvm->mmio_bus, addr);
}
@@ -1519,7 +1608,7 @@ int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
data = 3;
break;
case MSR_IA32_APICBASE:
- data = vcpu->apic_base;
+ data = kvm_lapic_get_base(vcpu);
break;
case MSR_IA32_MISC_ENABLE:
data = vcpu->ia32_misc_enable_msr;
@@ -1597,7 +1686,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
case 0x200 ... 0x2ff: /* MTRRs */
break;
case MSR_IA32_APICBASE:
- vcpu->apic_base = data;
+ kvm_lapic_set_base(vcpu, data);
break;
case MSR_IA32_MISC_ENABLE:
vcpu->ia32_misc_enable_msr = data;
@@ -1861,8 +1950,9 @@ static int kvm_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
if (vcpu->sigset_active)
sigprocmask(SIG_SETMASK, &vcpu->sigset, &sigsaved);
- /* re-sync apic's tpr */
- vcpu->cr8 = kvm_run->cr8;
+ if (!vcpu->kvm->enable_kernel_pic)
+ /* re-sync apic's tpr if the APIC is in userspace */
+ kvm_lapic_set_tpr(vcpu, kvm_run->cr8);
if (vcpu->pio.cur_count) {
r = complete_pio(vcpu);
@@ -2011,11 +2101,12 @@ static int kvm_vcpu_ioctl_get_sregs(struct kvm_vcpu *vcpu,
sregs->cr2 = vcpu->cr2;
sregs->cr3 = vcpu->cr3;
sregs->cr4 = vcpu->cr4;
- sregs->cr8 = vcpu->cr8;
sregs->efer = vcpu->shadow_efer;
- sregs->apic_base = vcpu->apic_base;
- kvm_user_irqdev_save(&vcpu->irq.dev, &sregs->interrupt_bitmap);
+ kvm_lapic_save(vcpu, sregs);
+
+ if (!vcpu->kvm->enable_kernel_pic)
+ kvm_user_irqdev_save(&vcpu->irq.dev, &sregs->interrupt_bitmap);
vcpu_put(vcpu);
@@ -2047,14 +2138,10 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
mmu_reset_needed |= vcpu->cr3 != sregs->cr3;
vcpu->cr3 = sregs->cr3;
- vcpu->cr8 = sregs->cr8;
-
mmu_reset_needed |= vcpu->shadow_efer != sregs->efer;
#ifdef CONFIG_X86_64
kvm_arch_ops->set_efer(vcpu, sregs->efer);
#endif
- vcpu->apic_base = sregs->apic_base;
-
kvm_arch_ops->decache_cr4_guest_bits(vcpu);
mmu_reset_needed |= vcpu->cr0 != sregs->cr0;
@@ -2068,8 +2155,11 @@ static int kvm_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu,
if (mmu_reset_needed)
kvm_mmu_reset_context(vcpu);
- kvm_user_irqdev_restore(&vcpu->irq.dev,
- &sregs->interrupt_bitmap[0]);
+ kvm_lapic_restore(vcpu, sregs);
+
+ if (!vcpu->kvm->enable_kernel_pic)
+ kvm_user_irqdev_restore(&vcpu->irq.dev,
+ &sregs->interrupt_bitmap[0]);
set_segment(vcpu, &sregs->cs, VCPU_SREG_CS);
set_segment(vcpu, &sregs->ds, VCPU_SREG_DS);
@@ -2458,7 +2548,12 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
kvm_irqdevice_init(&vcpu->irq.dev);
kvm_vcpu_irqsink_init(vcpu);
- r = kvm_userint_init(vcpu);
+
+ if (kvm->enable_kernel_pic)
+ r = kvm_kernint_init(vcpu);
+ else
+ r = kvm_userint_init(vcpu);
+
if (r < 0)
goto out_free_vcpus;
@@ -2602,6 +2697,12 @@ static int kvm_vcpu_ioctl_set_fpu(struct kvm_vcpu *vcpu, struct kvm_fpu *fpu)
return 0;
}
+static int kvm_vcpu_ioctl_apic_reset(struct kvm_vcpu *vcpu)
+{
+ kvm_lapic_reset(vcpu);
+ return 0;
+}
+
static long kvm_vcpu_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -2771,6 +2872,13 @@ static long kvm_vcpu_ioctl(struct file *filp,
r = 0;
break;
}
+ case KVM_APIC_RESET: {
+ r = kvm_vcpu_ioctl_apic_reset(vcpu);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
default:
;
}
@@ -2824,6 +2932,41 @@ static long kvm_vm_ioctl(struct file *filp,
goto out;
break;
}
+ case KVM_ENABLE_KERNEL_PIC: {
+ __u32 val;
+
+ r = -EFAULT;
+ if (copy_from_user(&val, argp, sizeof val))
+ goto out;
+ r = kvm_vm_ioctl_enable_kernel_pic(kvm, val);
+ if (r)
+ goto out;
+ break;
+ }
+ case KVM_ISA_INTERRUPT: {
+ struct kvm_interrupt irq;
+
+ r = -EFAULT;
+ if (copy_from_user(&irq, argp, sizeof irq))
+ goto out;
+ r = kvm_vm_ioctl_isa_interrupt(kvm, &irq);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
+ case KVM_APIC_MSG: {
+ struct kvm_apic_msg msg;
+
+ r = -EFAULT;
+ if (copy_from_user(&msg, argp, sizeof msg))
+ goto out;
+ r = kvm_vm_ioctl_apic_msg(kvm, &msg);
+ if (r)
+ goto out;
+ r = 0;
+ break;
+ }
default:
;
}
@@ -2955,12 +3098,21 @@ static long kvm_dev_ioctl(struct file *filp,
r = 0;
break;
}
- case KVM_CHECK_EXTENSION:
- /*
- * No extensions defined at present.
- */
- r = 0;
+ case KVM_CHECK_EXTENSION: {
+ int ext = (long)argp;
+
+ switch (ext) {
+ case KVM_ISA_INTERRUPT:
+ case KVM_APIC_MSG:
+ case KVM_APIC_RESET:
+ r = 1;
+ break;
+ default:
+ r = 0;
+ break;
+ }
break;
+ }
case KVM_GET_VCPU_MMAP_SIZE:
r = -EINVAL;
if (arg)
diff --git a/drivers/kvm/lapic.c b/drivers/kvm/lapic.c
new file mode 100644
index 0000000..9f0ab7e
--- /dev/null
+++ b/drivers/kvm/lapic.c
@@ -0,0 +1,1418 @@
+/*
+ * Local APIC virtualization
+ *
+ * Copyright (C) 2006 Qumranet, Inc.
+ * Copyright (C) 2007 Novell
+ *
+ * Authors:
+ * Dor Laor <dor.laor-atKUWr5tajBWk0Htik3J/w@public.gmane.org>
+ * Gregory Haskins <ghaskins-Et1tbQHTxzrQT0dZR+AlfA@public.gmane.org>
+ *
+ * Based on Xen 3.0 code, Copyright (c) 2004, Intel Corporation.
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ */
+
+#include "kvm.h"
+#include <linux/kvm.h>
+#include <linux/mm.h>
+#include <linux/highmem.h>
+#include <linux/smp.h>
+#include <linux/hrtimer.h>
+#include <asm/processor.h>
+#include <asm/io.h>
+#include <asm/msr.h>
+#include <asm/page.h>
+#include <asm/current.h>
+
+/*XXX remove this definition after GFW enabled */
+#define APIC_NO_BIOS
+
+#define PRId64 "d"
+#define PRIx64 "llx"
+#define PRIu64 "u"
+#define PRIo64 "o"
+
+#define APIC_BUS_CYCLE_NS 1
+
+/* #define apic_debug(fmt,arg...) printk(KERN_WARNING fmt,##arg) */
+#define apic_debug(fmt,arg...)
+
+struct kvm_kern_apic {
+ spinlock_t lock;
+ atomic_t ref_count;
+ int usermode;
+ u32 status;
+ u32 vcpu_id;
+ u64 base_msr;
+ unsigned long base_address;
+ struct kvm_io_device mmio_dev;
+ struct {
+ unsigned long pending;
+ u32 divide_count;
+ ktime_t last_update;
+ struct hrtimer dev;
+ } timer;
+ u32 err_status;
+ u32 err_write_count;
+ struct kvm_vcpu *vcpu;
+ struct kvm_irqdevice *irq_dev;
+ struct page *regs_page;
+ void *regs;
+};
+
+static __inline__ int find_highest_bit(unsigned long *data, int nr_bits)
+{
+ int length = BITS_TO_LONGS(nr_bits);
+ while (length && !data[--length])
+ continue;
+ return __ffs(data[length]) + (length * BITS_PER_LONG);
+}
+
+#define APIC_LVT_NUM 6
+/* 14 is the version for Xeon and Pentium 8.4.8*/
+#define APIC_VERSION (0x14UL | ((APIC_LVT_NUM - 1) << 16))
+#define VLOCAL_APIC_MEM_LENGTH (1 << 12)
+/* followed define is not in apicdef.h */
+#define APIC_SHORT_MASK 0xc0000
+#define APIC_DEST_NOSHORT 0x0
+#define APIC_DEST_MASK 0x800
+#define _APIC_GLOB_DISABLE 0x0
+#define APIC_GLOB_DISABLE_MASK 0x1
+#define APIC_SOFTWARE_DISABLE_MASK 0x2
+#define _APIC_BSP_ACCEPT_PIC 0x3
+#define MAX_APIC_INT_VECTOR 256
+
+#define inject_gp(vcpu) kvm_arch_ops->inject_gp(vcpu, 0);
+
+#define apic_enabled(apic) \
+ (!((apic)->status & \
+ (APIC_GLOB_DISABLE_MASK | APIC_SOFTWARE_DISABLE_MASK)))
+
+#define apic_global_enabled(apic) \
+ (!(test_bit(_APIC_GLOB_DISABLE, &(apic)->status)))
+
+#define LVT_MASK \
+ APIC_LVT_MASKED | APIC_SEND_PENDING | APIC_VECTOR_MASK
+
+#define LINT_MASK \
+ LVT_MASK | APIC_MODE_MASK | APIC_INPUT_POLARITY |\
+ APIC_LVT_REMOTE_IRR | APIC_LVT_LEVEL_TRIGGER
+
+#define KVM_APIC_ID(apic) \
+ (GET_APIC_ID(apic_get_reg(apic, APIC_ID)))
+
+#define apic_lvt_enabled(apic, lvt_type) \
+ (!(apic_get_reg(apic, lvt_type) & APIC_LVT_MASKED))
+
+#define apic_lvt_vector(apic, lvt_type) \
+ (apic_get_reg(apic, lvt_type) & APIC_VECTOR_MASK)
+
+#define apic_lvt_dm(apic, lvt_type) \
+ (apic_get_reg(apic, lvt_type) & APIC_MODE_MASK)
+
+#define apic_lvtt_period(apic) \
+ (apic_get_reg(apic, APIC_LVTT) & APIC_LVT_TIMER_PERIODIC)
+
+static inline u32 apic_get_reg(struct kvm_kern_apic *apic, u32 reg)
+{
+ return *((u32 *)(apic->regs + reg));
+}
+
+static inline void apic_set_reg(struct kvm_kern_apic *apic,
+ u32 reg, u32 val)
+{
+ *((u32 *)(apic->regs + reg)) = val;
+}
+
+static unsigned int apic_lvt_mask[APIC_LVT_NUM] =
+{
+ LVT_MASK | APIC_LVT_TIMER_PERIODIC, /* LVTT */
+ LVT_MASK | APIC_MODE_MASK, /* LVTTHMR */
+ LVT_MASK | APIC_MODE_MASK, /* LVTPC */
+ LINT_MASK, LINT_MASK, /* LVT0-1 */
+ LVT_MASK /* LVTERR */
+};
+
+#define ASSERT(x) \
+ if (!(x)) { \
+ printk(KERN_EMERG "assertion failed %s: %d: %s\n", \
+ __FILE__, __LINE__, #x); \
+ BUG(); \
+ }
+
+static int apic_find_highest_irr(struct kvm_kern_apic *apic)
+{
+ int result;
+
+ result = find_highest_bit((unsigned long *)(apic->regs + APIC_IRR),
+ MAX_APIC_INT_VECTOR);
+
+ ASSERT( result == 0 || result >= 16);
+
+ return result;
+}
+
+
+static int apic_find_highest_isr(struct kvm_kern_apic *apic)
+{
+ int result;
+
+ result = find_highest_bit((unsigned long *)(apic->regs + APIC_ISR),
+ MAX_APIC_INT_VECTOR);
+
+ ASSERT( result == 0 || result >= 16);
+
+ return result;
+}
+
+static void apic_dropref(struct kvm_kern_apic *apic)
+{
+ if (atomic_dec_and_test(&apic->ref_count)) {
+
+ spin_lock_bh(&apic->lock);
+
+ hrtimer_cancel(&apic->timer.dev);
+
+ if (apic->regs_page) {
+ __free_page(apic->regs_page);
+ apic->regs_page = 0;
+ }
+
+ spin_unlock_bh(&apic->lock);
+
+ kfree(apic);
+ }
+}
+
+#if 0
+static void apic_dump_state(struct kvm_kern_apic *apic)
+{
+ u64 *tmp;
+
+ printk(KERN_INFO "%s begin\n", __FUNCTION__);
+
+ printk(KERN_INFO "status = 0x%08x\n", apic->status);
+ printk(KERN_INFO "base_msr=0x%016llx, apicbase = 0x%08lx\n",
+ apic->base_msr, apic->base_address);
+
+ tmp = (u64*)(apic->regs + APIC_IRR);
+ printk(KERN_INFO "IRR = 0x%016llx 0x%016llx 0x%016llx 0x%016llx\n",
+ tmp[3], tmp[2], tmp[1], tmp[0]);
+ tmp = (u64*)(apic->regs + APIC_ISR);
+ printk(KERN_INFO "ISR = 0x%016llx 0x%016llx 0x%016llx 0x%016llx\n",
+ tmp[3], tmp[2], tmp[1], tmp[0]);
+ tmp = (u64*)(apic->regs + APIC_TMR);
+ printk(KERN_INFO "TMR = 0x%016llx 0x%016llx 0x%016llx 0x%016llx\n",
+ tmp[3], tmp[2], tmp[1], tmp[0]);
+
+ printk(KERN_INFO "APIC_ID=0x%08x\n", apic_get_reg(apic, APIC_ID));
+ printk(KERN_INFO "APIC_TASKPRI=0x%08x\n",
+ apic_get_reg(apic, APIC_TASKPRI) & 0xff);
+ printk(KERN_INFO "APIC_PROCPRI=0x%08x\n",
+ apic_get_reg(apic, APIC_PROCPRI));
+
+ printk(KERN_INFO "APIC_DFR=0x%08x\n",
+ apic_get_reg(apic, APIC_DFR) | 0x0FFFFFFF);
+ printk(KERN_INFO "APIC_LDR=0x%08x\n",
+ apic_get_reg(apic, APIC_LDR) & APIC_LDR_MASK);
+ printk(KERN_INFO "APIC_SPIV=0x%08x\n",
+ apic_get_reg(apic, APIC_SPIV) & 0x3ff);
+ printk(KERN_INFO "APIC_ESR=0x%08x\n",
+ apic_get_reg(apic, APIC_ESR));
+ printk(KERN_INFO "APIC_ICR=0x%08x\n",
+ apic_get_reg(apic, APIC_ICR) & ~(1 << 12));
+ printk(KERN_INFO "APIC_ICR2=0x%08x\n",
+ apic_get_reg(apic, APIC_ICR2) & 0xff000000);
+
+ printk(KERN_INFO "APIC_LVTERR=0x%08x\n",
+ apic_get_reg(apic, APIC_LVTERR));
+ printk(KERN_INFO "APIC_LVT1=0x%08x\n",
+ apic_get_reg(apic, APIC_LVT1));
+ printk(KERN_INFO "APIC_LVT0=0x%08x\n",
+ apic_get_reg(apic, APIC_LVT0));
+ printk(KERN_INFO "APIC_LVTPC=0x%08x\n",
+ apic_get_reg(apic, APIC_LVTPC));
+ printk(KERN_INFO "APIC_LVTTHMR=0x%08x\n",
+ apic_get_reg(apic, APIC_LVTTHMR));
+ printk(KERN_INFO "APIC_LVTT=0x%08x\n",
+ apic_get_reg(apic, APIC_LVTT));
+
+ printk(KERN_INFO "APIC_TMICT=0x%08x\n",
+ apic_get_reg(apic, APIC_TMICT));
+ printk(KERN_INFO "APIC_TDCR=0x%08x\n",
+ apic_get_reg(apic, APIC_TDCR));
+
+ printk(KERN_INFO "%s end\n", __FUNCTION__);
+}
+#endif
+
+
+static int apic_update_ppr(struct kvm_kern_apic *apic)
+{
+ u32 tpr, isrv, ppr, orig_ppr;
+ int irq;
+ int masked = 0;
+ int forward = 0;
+
+ ppr = apic_get_reg(apic, APIC_PROCPRI);
+ orig_ppr = ppr;
+
+ /*
+ * Before we change anything, see if the only pending vectors we have
+ * are anything masked by PPR
+ */
+ irq = apic_find_highest_irr(apic);
+ if (irq && ((irq & 0xf0) <= ppr))
+ masked = true;
+
+ /*
+ * Compute the PPR value based on the current settings of TPR/ISR
+ */
+ tpr = apic_get_reg(apic, APIC_TASKPRI);
+ irq = apic_find_highest_isr(apic);
+ isrv = (irq >> 4) & 0xf;
+
+ if ((tpr >> 4) >= isrv)
+ ppr = tpr & 0xff;
+ else
+ ppr = isrv << 4; /* low 4 bits of PPR have to be cleared */
+
+ apic_set_reg(apic, APIC_PROCPRI, ppr);
+
+ if (masked) {
+ /*
+ * If we get here its because there were vectors that
+ * were masked by PPR. Check again to see if anything is
+ * now available
+ */
+ irq = apic_find_highest_irr(apic);
+ if ((irq & 0xf0) > ppr)
+ forward = 1;
+ }
+
+ apic_debug("%s: ppr 0x%x (old) 0x%x (new), isr 0x%x, isrv 0x%x\n",
+ __FUNCTION__, orig_ppr, ppr, irq, isrv);
+
+ return forward;
+}
+
+static void apic_set_tpr(struct kvm_kern_apic *apic, u32 tpr)
+{
+ int forward = 0;
+
+ apic_debug("new value = %x\n", tpr);
+
+ apic_set_reg(apic, APIC_TASKPRI, tpr);
+ forward = apic_update_ppr(apic);
+
+ if (forward) {
+ spin_unlock_bh(&apic->lock);
+ kvm_irqdevice_set_intr(apic->irq_dev, kvm_irqpin_localint);
+ spin_lock_bh(&apic->lock);
+ }
+}
+
+static int apic_match_dest(struct kvm_kern_apic *target,
+ int dest,
+ int dest_mode,
+ int delivery_mode)
+{
+ int result = 0;
+
+ spin_lock_bh(&target->lock);
+
+ if (!dest_mode) /* Physical */
+ result = (GET_APIC_ID(apic_get_reg(target, APIC_ID)) == dest);
+ else { /* Logical */
+ u32 ldr = apic_get_reg(target, APIC_LDR);
+
+ /* Flat mode */
+ if (apic_get_reg(target, APIC_DFR) == APIC_DFR_FLAT)
+ result = GET_APIC_LOGICAL_ID(ldr) & dest;
+ else {
+ if ((delivery_mode == APIC_DM_LOWEST) &&
+ (dest == 0xff)) {
+ printk(KERN_ALERT "Broadcast IPI " \
+ "with lowest priority "
+ "delivery mode\n");
+ spin_unlock_bh(&target->lock);
+ kvm_crash_guest(target->vcpu->kvm);
+ return 0;
+ }
+ if (GET_APIC_LOGICAL_ID(ldr) == (dest & 0xf))
+ result = (GET_APIC_LOGICAL_ID(ldr) >> 4) &
+ (dest >> 4);
+ else
+ result = 0;
+ }
+ }
+
+ spin_unlock_bh(&target->lock);
+
+ return result;
+}
+
+/*
+ * Add a pending IRQ into lapic.
+ * Return 1 if successfully added and 0 if discarded.
+ */
+static int __apic_accept_irq(struct kvm_kern_apic *apic,
+ int delivery_mode,
+ int vector,
+ int level,
+ int trig_mode)
+{
+ kvm_irqpin_t pin = kvm_irqpin_invalid;
+
+ switch (delivery_mode) {
+ case APIC_DM_FIXED:
+ case APIC_DM_LOWEST:
+ if (unlikely(!apic_enabled(apic)))
+ break;
+
+ if (test_and_set_bit(vector, apic->regs + APIC_IRR)
+ && trig_mode) {
+ apic_debug("level trig mode repeatedly for vector " \
+ "%d\n", vector);
+ break;
+ }
+
+ if (trig_mode) {
+ apic_debug("level trig mode for vector %d\n", vector);
+ set_bit(vector, apic->regs + APIC_TMR);
+ }
+
+ apic_debug("FIXED/LOWEST interrupt for vector %d\n", vector);
+ pin = kvm_irqpin_localint;
+ break;
+ case APIC_DM_REMRD:
+ printk(KERN_WARNING "%s: Ignore deliver mode %d\n",
+ __FUNCTION__, delivery_mode);
+ break;
+ case APIC_DM_EXTINT:
+ apic_debug("EXTINT interrupt\n");
+ pin = kvm_irqpin_extint;
+ break;
+ case APIC_DM_SMI:
+ apic_debug("SMI interrupt\n");
+ pin = kvm_irqpin_smi;
+ break;
+ case APIC_DM_NMI:
+ apic_debug("NMI interrupt\n");
+ pin = kvm_irqpin_nmi;
+ break;
+ case APIC_DM_INIT:
+ apic_debug("INIT interrupt\n");
+ if (level) {
+ spin_unlock_bh(&apic->lock);
+ kvm_lapic_reset(apic->vcpu);
+ spin_lock_bh(&apic->lock);
+ }
+ break;
+ case APIC_DM_STARTUP: /* FIXME: currently no support for SMP */
+ default:
+ printk(KERN_ALERT "TODO: support interrupt type %x\n",
+ delivery_mode);
+ spin_unlock_bh(&apic->lock);
+ kvm_crash_guest(apic->vcpu->kvm);
+ spin_lock_bh(&apic->lock);
+ break;
+ }
+
+ if (likely(pin != kvm_irqpin_invalid)) {
+ /*
+ * temp release of the lock to transmit
+ */
+ spin_unlock_bh(&apic->lock);
+ kvm_irqdevice_set_intr(apic->irq_dev, pin);
+ spin_lock_bh(&apic->lock);
+
+ return 1;
+ } else
+ return 0;
+}
+
+static int apic_accept_irq(struct kvm_kern_apic *apic,
+ int delivery_mode,
+ int vector,
+ int level,
+ int trig_mode)
+{
+ int ret;
+
+ spin_lock_bh(&apic->lock);
+ ret = __apic_accept_irq(apic, delivery_mode, vector,
+ level, trig_mode);
+ spin_unlock_bh(&apic->lock);
+
+ return ret;
+}
+
+static void apic_set_eoi(struct kvm_kern_apic *apic)
+{
+ int vector = apic_find_highest_isr(apic);
+ int forward;
+
+ /*
+ * Not every write EOI will has corresponding ISR,
+ * one example is when Kernel check timer on setup_IO_APIC
+ */
+ if (!vector)
+ return;
+
+ __clear_bit(vector, apic->regs + APIC_ISR);
+ forward = apic_update_ppr(apic);
+
+ __clear_bit(vector, apic->regs + APIC_TMR);
+
+ if (forward) {
+ spin_unlock_bh(&apic->lock);
+ kvm_irqdevice_set_intr(apic->irq_dev, kvm_irqpin_localint);
+ spin_lock_bh(&apic->lock);
+ }
+}
+
+static int apic_check_vector(struct kvm_kern_apic *apic,u32 dm, u32 vector)
+{
+ if ((dm == APIC_DM_FIXED) && (vector < 16)) {
+ apic->err_status |= 0x40;
+ __apic_accept_irq(apic, APIC_DM_FIXED,
+ apic_lvt_vector(apic, APIC_LVTERR), 0, 0);
+ apic_debug("%s: check failed "
+ " dm %x vector %x\n", __FUNCTION__, dm, vector);
+ return 0;
+ }
+ return 1;
+}
+
+int kvm_apicbus_send(struct kvm *kvm, int dest, int trig_mode, int level,
+ int dest_mode, int delivery_mode, int vector)
+{
+ int i;
+ u32 lpr_map = 0;
+
+ apic_debug("%s: %d %d %d %d %d %d\n", __FUNCTION__,
+ dest, trig_mode, level, dest_mode, delivery_mode, vector);
+
+ for (i = 0; i < KVM_MAX_VCPUS; ++i) {
+ struct kvm_kern_apic *target;
+ target = kvm->vcpus[i].apic.dev;
+
+ if (!target)
+ continue;
+
+ if (apic_match_dest(target, dest, dest_mode, delivery_mode)) {
+ if (delivery_mode == APIC_DM_LOWEST)
+ __set_bit(target->vcpu_id, &lpr_map);
+ else
+ apic_accept_irq(target, delivery_mode,
+ vector, level, trig_mode);
+ }
+ }
+
+ if (delivery_mode == APIC_DM_LOWEST) {
+ struct kvm_kern_apic *target;
+
+ /* Currently only UP is supported */
+ target = kvm->vcpus[0].apic.dev;
+
+ if (target)
+ apic_accept_irq(target, delivery_mode,
+ vector, level, trig_mode);
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_apicbus_send);
+
+static void apic_send_ipi(struct kvm_kern_apic *apic)
+{
+ u32 icr_low = apic_get_reg(apic, APIC_ICR);
+ u32 icr_high = apic_get_reg(apic, APIC_ICR2);
+
+ unsigned int dest = GET_APIC_DEST_FIELD(icr_high);
+ unsigned int short_hand = icr_low & APIC_SHORT_MASK;
+ unsigned int trig_mode = icr_low & APIC_INT_LEVELTRIG;
+ unsigned int level = icr_low & APIC_INT_ASSERT;
+ unsigned int dest_mode = icr_low & APIC_DEST_MASK;
+ unsigned int delivery_mode = icr_low & APIC_MODE_MASK;
+ unsigned int vector = icr_low & APIC_VECTOR_MASK;
+
+ apic_debug("icr_high 0x%x, icr_low 0x%x, "
+ "short_hand 0x%x, dest 0x%x, trig_mode 0x%x, level 0x%x, "
+ "dest_mode 0x%x, delivery_mode 0x%x, vector 0x%x\n",
+ icr_high, icr_low, short_hand, dest,
+ trig_mode, level, dest_mode, delivery_mode, vector);
+
+ /*
+ * We unlock here because we would enter this function in a lock
+ * state and we dont want to remain this way while we transmit
+ */
+ spin_unlock_bh(&apic->lock);
+
+ switch (short_hand) {
+ case APIC_DEST_NOSHORT:
+ /*
+ * If no short-hand notation is in use, just forward the
+ * message onto the apicbus and let the bus handle the routing.
+ */
+ kvm_apicbus_send(apic->vcpu->kvm, dest, trig_mode, level,
+ dest_mode, delivery_mode, vector);
+ break;
+ case APIC_DEST_SELF:
+ apic_accept_irq(apic, delivery_mode, vector, level, trig_mode);
+ break;
+ default: {
+ /*
+ * Otherwise we need to consider the short-hand to find the
+ * correct targets.
+ */
+ unsigned int i;
+
+ for (i = 0; i < KVM_MAX_VCPUS; ++i) {
+ struct kvm_kern_apic *target;
+ int result = 0;
+
+ target = apic->vcpu->kvm->vcpus[i].apic.dev;
+
+ if (!target)
+ continue;
+
+ switch (short_hand) {
+ case APIC_DEST_ALLINC:
+ result = 1;
+ break;
+
+ case APIC_DEST_ALLBUT:
+ if (target != apic)
+ result = 1;
+ break;
+ default:
+ kvm_crash_guest(apic->vcpu->kvm);
+ return;
+ }
+
+ if (result)
+ apic_accept_irq(target, delivery_mode,
+ vector, level, trig_mode);
+ }
+ }
+ }
+
+ /*
+ * Relock before returning
+ */
+ spin_lock_bh(&apic->lock);
+
+}
+
+static u32 apic_get_tmcct(struct kvm_kern_apic *apic)
+{
+ u32 counter_passed;
+ ktime_t passed, now = apic->timer.dev.base->get_time();
+ u32 tmcct = apic_get_reg(apic, APIC_TMCCT);
+
+ ASSERT(apic != NULL);
+
+ if (unlikely(ktime_to_ns(now) <=
+ ktime_to_ns(apic->timer.last_update))) {
+ /* Wrap around */
+ passed = ktime_add(
+ ({ (ktime_t){
+ .tv64 = KTIME_MAX -
+ (apic->timer.last_update).tv64 };
+ }), now);
+ apic_debug("time elapsed\n");
+ } else
+ passed = ktime_sub(now, apic->timer.last_update);
+
+ counter_passed = ktime_to_ns(passed) /
+ (APIC_BUS_CYCLE_NS * apic->timer.divide_count);
+ tmcct -= counter_passed;
+
+ if (tmcct <= 0) {
+ if (unlikely(!apic_lvtt_period(apic))) {
+ tmcct = 0;
+ } else {
+ do {
+ tmcct += apic_get_reg(apic, APIC_TMICT);
+ } while ( tmcct <= 0 );
+ }
+ }
+
+ apic->timer.last_update = now;
+ apic_set_reg(apic, APIC_TMCCT, tmcct);
+
+ return tmcct;
+}
+
+/*
+ *----------------------------------------------------------------------
+ * MMIO
+ *----------------------------------------------------------------------
+ */
+
+#define align(val, len) (val & ~(len-1))
+
+static int validate_mmio(struct kvm_kern_apic *apic, gpa_t address, int len)
+{
+ /*
+ * According to IA 32 Manual, all registers should be accessed with
+ * 32 bits alignment.
+ */
+ if (align(address, 4) != align(address+(len-1), 4)) {
+ printk(KERN_WARNING "KVM: MMIO request for %d bytes at " \
+ "0x%lx is not 32 bit aligned. Injecting #GP\n",
+ len, address);
+ inject_gp(apic->vcpu);
+ return 0;
+ }
+
+ return 1;
+}
+
+static u32 __apic_read(struct kvm_kern_apic *apic,
+ unsigned int offset)
+{
+ u32 val = 0;
+
+ if (offset > APIC_TDCR)
+ return 0;
+
+ switch (offset) {
+ case APIC_ARBPRI:
+ printk(KERN_WARNING "access local APIC ARBPRI register " \
+ "which is for P6\n");
+ break;
+
+ case APIC_TMCCT: /* Timer CCR */
+ val = apic_get_tmcct(apic);
+ break;
+
+ case APIC_ESR:
+ apic->err_write_count = 0;
+ /* fall through */
+ default:
+ val = apic_get_reg(apic, offset);
+ break;
+ }
+
+ return val;
+}
+
+static void apic_mmio_read(struct kvm_io_device *this,
+ gpa_t address,
+ int len,
+ void *data)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+ unsigned int offset = address - apic->base_address;
+ unsigned char alignment = offset & 0x3;
+ u32 val;
+
+ if (!validate_mmio(apic, address, len))
+ return;
+
+ spin_lock_bh(&apic->lock);
+ val = __apic_read(apic, offset & ~0x3);
+ spin_unlock_bh(&apic->lock);
+
+ switch (len) {
+ case 1:
+ case 2:
+ case 4:
+ memcpy(data, (char*)((char*)&val + alignment), len);
+ break;
+ default:
+ printk(KERN_ALERT "Local APIC read with len = %x, " \
+ "should be 1,2, or 4 instead\n", len);
+ inject_gp(apic->vcpu);
+ break;
+ }
+}
+
+static void apic_mmio_write(struct kvm_io_device *this,
+ gpa_t address,
+ int len,
+ const void *data)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+ unsigned int offset = address - apic->base_address;
+ unsigned char alignment = offset & 0x3;
+ u32 val;
+
+ if (!validate_mmio(apic, address, len))
+ return;
+
+ spin_lock_bh(&apic->lock);
+
+ switch (len) {
+ case 1:
+ case 2: {
+ unsigned int tmp;
+
+ /*
+ * Some kernels will access with byte/word alignment
+ */
+ apic_debug("Notice: Local APIC write with len = %x\n", len);
+ tmp = __apic_read(apic, offset & ~0x3);
+ switch (len) {
+ case 1:
+ val = *(u8*)data;
+
+ val = (tmp & ~(0xff << (8*alignment))) |
+ ((val & 0xff) << (8*alignment));
+ break;
+
+ case 2:
+ if (alignment != 0x0 && alignment != 0x2) {
+ printk(KERN_ALERT "alignment error for apic " \
+ "with len == 2\n");
+ inject_gp(apic->vcpu);
+ }
+
+ /*
+ * assumes 16 bit alignment on the pointer.
+ * Mis-alignment is a host-side issue, however, so
+ * we crash
+ */
+ BUG_ON(((long)data & 0x1));
+
+ val = *(u16*)data;
+
+ val = (tmp & ~(0xffff << (8*alignment))) |
+ ((val & 0xffff) << (8*alignment));
+ break;
+ }
+
+ break;
+ }
+ case 4:
+ memcpy(&val, data, 4);
+ break;
+ default:
+ printk(KERN_ALERT "Local APIC write with len = %x, " \
+ "should be 1,2, or 4 instead\n", len);
+ inject_gp(apic->vcpu);
+ break;
+ }
+
+ /* too common printing */
+ if (offset != APIC_EOI)
+ apic_debug("%s: offset 0x%x with length 0x%x, and value is " \
+ "0x%lx\n",
+ __FUNCTION__, offset, len, val);
+
+ offset &= 0xff0;
+
+ switch (offset) {
+ case APIC_ID: /* Local APIC ID */
+ apic_set_reg(apic, APIC_ID, val);
+ break;
+
+ case APIC_TASKPRI:
+ apic_set_tpr(apic, val & 0xff);
+ break;
+
+ case APIC_EOI:
+ apic_set_eoi(apic);
+ break;
+
+ case APIC_LDR:
+ apic_set_reg(apic, APIC_LDR, val & APIC_LDR_MASK);
+ break;
+
+ case APIC_DFR:
+ apic_set_reg(apic, APIC_DFR, val | 0x0FFFFFFF);
+ break;
+
+ case APIC_SPIV:
+ apic_set_reg(apic, APIC_SPIV, val & 0x3ff);
+ if (!(val & APIC_SPIV_APIC_ENABLED)) {
+ int i;
+ u32 lvt_val;
+
+ apic->status |= APIC_SOFTWARE_DISABLE_MASK;
+ for (i = 0; i < APIC_LVT_NUM; i++) {
+ lvt_val = apic_get_reg(apic,
+ APIC_LVTT +
+ 0x10 * i);
+ apic_set_reg(apic, APIC_LVTT + 0x10 * i,
+ lvt_val | APIC_LVT_MASKED);
+ }
+
+ if ((apic_get_reg(apic, APIC_LVT0) &
+ APIC_MODE_MASK) == APIC_DM_EXTINT)
+ clear_bit(_APIC_BSP_ACCEPT_PIC, &apic->status);
+ } else {
+ apic->status &= ~APIC_SOFTWARE_DISABLE_MASK;
+ if ((apic_get_reg(apic, APIC_LVT0) &
+ APIC_MODE_MASK) == APIC_DM_EXTINT)
+ set_bit(_APIC_BSP_ACCEPT_PIC, &apic->status);
+ }
+ break;
+
+ case APIC_ESR:
+ apic->err_write_count = !apic->err_write_count;
+ if (!apic->err_write_count)
+ apic->err_status = 0;
+ break;
+
+ case APIC_ICR:
+ /* No delay here, so we always clear the pending bit*/
+ apic_set_reg(apic, APIC_ICR, val & ~(1 << 12));
+ apic_send_ipi(apic);
+ break;
+
+ case APIC_ICR2:
+ apic_set_reg(apic, APIC_ICR2, val & 0xff000000);
+ break;
+
+ case APIC_LVTT:
+ case APIC_LVTTHMR:
+ case APIC_LVTPC:
+ case APIC_LVT0:
+ case APIC_LVT1:
+ case APIC_LVTERR:
+ {
+ if (apic->status & APIC_SOFTWARE_DISABLE_MASK)
+ val |= APIC_LVT_MASKED;
+
+ val &= apic_lvt_mask[(offset - APIC_LVTT) >> 4];
+ apic_set_reg(apic, offset, val);
+
+ /* On hardware, when write vector less than 0x20 will error */
+ if (!(val & APIC_LVT_MASKED))
+ apic_check_vector(apic, apic_lvt_dm(apic, offset),
+ apic_lvt_vector(apic, offset));
+ if (!apic->vcpu_id && (offset == APIC_LVT0)) {
+ if ((val & APIC_MODE_MASK) == APIC_DM_EXTINT)
+ if (val & APIC_LVT_MASKED)
+ clear_bit(_APIC_BSP_ACCEPT_PIC,
+ &apic->status);
+ else
+ set_bit(_APIC_BSP_ACCEPT_PIC,
+ &apic->status);
+ else
+ clear_bit(_APIC_BSP_ACCEPT_PIC,
+ &apic->status);
+ }
+ }
+ break;
+
+ case APIC_TMICT:
+ {
+ ktime_t now = apic->timer.dev.base->get_time();
+ u32 offset;
+
+ apic_set_reg(apic, APIC_TMICT, val);
+ apic_set_reg(apic, APIC_TMCCT, val);
+ apic->timer.last_update = now;
+ offset = APIC_BUS_CYCLE_NS * apic->timer.divide_count * val;
+
+ /* Make sure the lock ordering is coherent */
+ spin_unlock_bh(&apic->lock);
+ hrtimer_cancel(&apic->timer.dev);
+ hrtimer_start(&apic->timer.dev,
+ ktime_add_ns(now, offset),
+ HRTIMER_MODE_ABS);
+
+ apic_debug("%s: bus cycle is %"PRId64"ns, now 0x%016"PRIx64", "
+ "timer initial count 0x%x, offset 0x%x, "
+ "expire @ 0x%016"PRIx64".\n", __FUNCTION__,
+ APIC_BUS_CYCLE_NS, ktime_to_ns(now),
+ apic_get_reg(apic, APIC_TMICT),
+ offset, ktime_to_ns(ktime_add_ns(now, offset)));
+ }
+ return;
+
+ case APIC_TDCR:
+ {
+ unsigned int tmp1, tmp2;
+
+ tmp1 = val & 0xf;
+ tmp2 = ((tmp1 & 0x3) | ((tmp1 & 0x8) >> 1)) + 1;
+ apic->timer.divide_count = 0x1 << (tmp2 & 0x7);
+
+ apic_set_reg(apic, APIC_TDCR, val);
+
+ apic_debug("timer divide count is 0x%x\n",
+ apic->timer.divide_count);
+ }
+ break;
+
+ default:
+ printk(KERN_WARNING "Local APIC Write to read-only register\n");
+ break;
+ }
+
+ spin_unlock_bh(&apic->lock);
+}
+
+static int apic_mmio_range(struct kvm_io_device *this, gpa_t addr)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+ int ret = 0;
+
+ spin_lock_bh(&apic->lock);
+
+ if (apic_global_enabled(apic) &&
+ (addr >= apic->base_address) &&
+ (addr < (apic->base_address + VLOCAL_APIC_MEM_LENGTH)))
+ ret = 1;
+
+ spin_unlock_bh(&apic->lock);
+
+ return ret;
+}
+
+static void apic_mmio_destructor(struct kvm_io_device *this)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+
+ apic_dropref(apic);
+}
+
+static void apic_mmio_register(struct kvm_kern_apic *apic)
+{
+ /* Register ourselves with the MMIO subsystem */
+ struct kvm_io_device *dev = &apic->mmio_dev;
+
+ dev->read = apic_mmio_read;
+ dev->write = apic_mmio_write;
+ dev->in_range = apic_mmio_range;
+ dev->destructor = apic_mmio_destructor;
+
+ dev->private = apic;
+ atomic_inc(&apic->ref_count);
+
+ apic->vcpu->apic.mmio = dev;
+}
+
+/*
+ *----------------------------------------------------------------------
+ * LAPIC interface
+ *----------------------------------------------------------------------
+ */
+
+void kvm_lapic_set_tpr(struct kvm_vcpu *vcpu, u64 cr8)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)vcpu->apic.dev;
+
+ spin_lock_bh(&apic->lock);
+ apic_set_tpr(apic, ((cr8 & 0x0f) << 4));
+ spin_unlock_bh(&apic->lock);
+}
+
+u64 kvm_lapic_get_tpr(struct kvm_vcpu *vcpu)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)vcpu->apic.dev;
+ u64 tpr;
+
+ spin_lock_bh(&apic->lock);
+ tpr = (u64)apic_get_reg(apic, APIC_TASKPRI);
+ spin_unlock_bh(&apic->lock);
+
+ return (tpr & 0xf0) >> 4;
+}
+EXPORT_SYMBOL_GPL(kvm_lapic_get_tpr);
+
+void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)vcpu->apic.dev;
+
+ spin_lock_bh(&apic->lock);
+ if (apic->vcpu_id)
+ value &= ~MSR_IA32_APICBASE_BSP;
+
+ apic->base_msr = value;
+ apic->base_address = apic->base_msr & MSR_IA32_APICBASE_BASE;
+
+ /* with FSB delivery interrupt, we can restart APIC functionality */
+ if (!(value & MSR_IA32_APICBASE_ENABLE))
+ set_bit(_APIC_GLOB_DISABLE, &apic->status);
+ else
+ clear_bit(_APIC_GLOB_DISABLE, &apic->status);
+
+ apic_debug("apic base msr is 0x%016"PRIx64", and base address is " \
+ "0x%lx.\n", apic->base_msr, apic->base_address);
+
+ spin_unlock_bh(&apic->lock);
+}
+
+u64 kvm_lapic_get_base(struct kvm_vcpu *vcpu)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)vcpu->apic.dev;
+ u64 base;
+
+ spin_lock_bh(&apic->lock);
+ base = apic->base_msr;
+ spin_unlock_bh(&apic->lock);
+
+ return base;
+}
+EXPORT_SYMBOL_GPL(kvm_lapic_get_base);
+
+void kvm_lapic_save(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+{
+ /*
+ * FIXME: This needs to support the entire register set when
+ * enabled
+ */
+ sregs->cr8 = kvm_lapic_get_tpr(vcpu);
+ sregs->apic_base = kvm_lapic_get_base(vcpu);
+}
+
+void kvm_lapic_restore(struct kvm_vcpu *vcpu, struct kvm_sregs *sregs)
+{
+ /*
+ * FIXME: This needs to support the entire register set when
+ * enabled
+ */
+ kvm_lapic_set_tpr(vcpu, sregs->cr8);
+ kvm_lapic_set_base(vcpu, sregs->apic_base);
+}
+
+void kvm_lapic_reset(struct kvm_vcpu *vcpu)
+{
+ struct kvm_kern_apic *apic;
+ int i;
+
+ apic_debug("%s\n", __FUNCTION__);
+
+ ASSERT(vcpu);
+ apic = vcpu->apic.dev;
+ ASSERT(apic != NULL);
+
+ /* Stop the timer in case it's a reset to an active apic */
+ hrtimer_cancel(&apic->timer.dev);
+
+ spin_lock_bh(&apic->lock);
+
+ apic_set_reg(apic, APIC_ID, vcpu_slot(vcpu) << 24);
+ apic_set_reg(apic, APIC_LVR, APIC_VERSION);
+
+ for (i = 0; i < APIC_LVT_NUM; i++)
+ apic_set_reg(apic, APIC_LVTT + 0x10 * i, APIC_LVT_MASKED);
+
+ apic_set_reg(apic, APIC_DFR, 0xffffffffU);
+ apic_set_reg(apic, APIC_SPIV, 0xff);
+ apic_set_reg(apic, APIC_TASKPRI, 0);
+ apic_set_reg(apic, APIC_LDR, 0);
+ apic_set_reg(apic, APIC_ESR, 0);
+ apic_set_reg(apic, APIC_ICR, 0);
+ apic_set_reg(apic, APIC_ICR2, 0);
+ apic_set_reg(apic, APIC_TDCR, 0);
+ apic_set_reg(apic, APIC_TMICT, 0);
+ memset((void*)(apic->regs + APIC_IRR), 0, KVM_IRQ_BITMAP_SIZE(u8));
+ memset((void*)(apic->regs + APIC_ISR), 0, KVM_IRQ_BITMAP_SIZE(u8));
+ memset((void*)(apic->regs + APIC_TMR), 0, KVM_IRQ_BITMAP_SIZE(u8));
+
+ apic->base_msr =
+ MSR_IA32_APICBASE_ENABLE |
+ APIC_DEFAULT_PHYS_BASE;
+ if (vcpu_slot(vcpu) == 0)
+ apic->base_msr |= MSR_IA32_APICBASE_BSP;
+ apic->base_address = apic->base_msr & MSR_IA32_APICBASE_BASE;
+
+ apic->timer.divide_count = 0;
+ apic->timer.pending = 0;
+ apic->status = 0;
+
+#ifdef APIC_NO_BIOS
+ /*
+ * XXX According to mp specification, BIOS will enable LVT0/1,
+ * remove it after BIOS enabled
+ */
+ if (!vcpu_slot(vcpu)) {
+ apic_set_reg(apic, APIC_LVT0, APIC_MODE_EXTINT << 8);
+ apic_set_reg(apic, APIC_LVT1, APIC_MODE_NMI << 8);
+ set_bit(_APIC_BSP_ACCEPT_PIC, &apic->status);
+ }
+#endif
+
+ spin_unlock_bh(&apic->lock);
+
+ printk(KERN_INFO "%s: vcpu=%p, id=%d, base_msr=" \
+ "0x%016"PRIx64", base_address=0x%0lx.\n", __FUNCTION__, vcpu,
+ GET_APIC_ID(apic_get_reg(apic, APIC_ID)),
+ apic->base_msr, apic->base_address);
+}
+
+int kvm_lapic_enabled(struct kvm_vcpu *vcpu)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)vcpu->apic.dev;
+ int ret = 0;
+
+ spin_lock_bh(&apic->lock);
+ if (!apic->usermode)
+ ret = apic_enabled(apic);
+ spin_unlock_bh(&apic->lock);
+
+ return ret;
+}
+
+/*
+ *----------------------------------------------------------------------
+ * timer interface
+ *----------------------------------------------------------------------
+ */
+static int __apic_timer_fn(struct kvm_kern_apic *apic)
+{
+ u32 vector;
+ ktime_t now;
+ int result = 0;
+
+ if (unlikely(!apic_enabled(apic) ||
+ !apic_lvt_enabled(apic, APIC_LVTT))) {
+ apic_debug("%s: time interrupt although apic is down\n",
+ __FUNCTION__);
+ return 0;
+ }
+
+ vector = apic_lvt_vector(apic, APIC_LVTT);
+ now = apic->timer.dev.base->get_time();
+ apic->timer.last_update = now;
+ apic->timer.pending++;
+
+ __apic_accept_irq(apic, APIC_DM_FIXED, vector, 1, 0);
+
+ if (apic_lvtt_period(apic)) {
+ u32 offset;
+ u32 tmict = apic_get_reg(apic, APIC_TMICT);
+
+ apic_set_reg(apic, APIC_TMCCT, tmict);
+ offset = APIC_BUS_CYCLE_NS * apic->timer.divide_count * tmict;
+
+ result = 1;
+ apic->timer.dev.expires = ktime_add_ns(now, offset);
+
+ apic_debug("%s: now 0x%016"PRIx64", expire @ 0x%016"PRIx64", "
+ "timer initial count 0x%x, timer current count 0x%x.\n",
+ __FUNCTION__,
+ ktime_to_ns(now), ktime_add_ns(now, offset),
+ apic_get_reg(apic, APIC_TMICT),
+ apic_get_reg(apic, APIC_TMCCT));
+ } else {
+ apic_set_reg(apic, APIC_TMCCT, 0);
+ apic_debug("%s: now 0x%016"PRIx64", "
+ "timer initial count 0x%x, timer current count 0x%x.\n",
+ __FUNCTION__,
+ ktime_to_ns(now), apic_get_reg(apic, APIC_TMICT),
+ apic_get_reg(apic, APIC_TMCCT));
+ }
+
+ return result;
+}
+
+static enum hrtimer_restart apic_timer_fn(struct hrtimer *data)
+{
+ struct kvm_kern_apic *apic;
+ int restart_timer = 0;
+
+ apic = container_of(data, struct kvm_kern_apic, timer.dev);
+
+ spin_lock_bh(&apic->lock);
+ restart_timer = __apic_timer_fn(apic);
+ spin_unlock_bh(&apic->lock);
+
+ if (restart_timer)
+ return HRTIMER_RESTART;
+ else
+ return HRTIMER_NORESTART;
+}
+
+/*
+ *----------------------------------------------------------------------
+ * IRQDEVICE interface
+ *----------------------------------------------------------------------
+ */
+
+static int apic_irqdev_ack(struct kvm_irqdevice *this, int flags,
+ struct kvm_irqack_data *data)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+ int irq;
+
+ apic_debug("LAPIC ACK attempt\n");
+
+ spin_lock_bh(&apic->lock);
+
+ if (!apic_enabled(apic))
+ goto out;
+
+ if (!(flags & KVM_IRQACK_FLAG_PEEK)) {
+ irq = apic_find_highest_irr(apic);
+ if ((irq & 0xf0) > apic_get_reg(apic, APIC_PROCPRI)) {
+ BUG_ON (irq < 0x10);
+
+ __set_bit(irq, apic->regs + APIC_ISR);
+ __clear_bit(irq, apic->regs + APIC_IRR);
+ apic_update_ppr(apic);
+
+ /*
+ * We have to special case the timer interrupt
+ * because we want the vector to stay pending
+ * for each tick of the clock, even for a backlog.
+ * Therefore, if this was a timer vector and we
+ * still have ticks pending, keep IRR set
+ */
+ if (irq == apic_lvt_vector(apic, APIC_LVTT)) {
+ BUG_ON(!apic->timer.pending);
+ apic->timer.pending--;
+ if (apic->timer.pending)
+ __set_bit(irq, apic->regs + APIC_IRR);
+ }
+
+ data->flags |= KVM_IRQACKDATA_VECTOR_VALID;
+ data->vector = irq;
+ }
+ else
+ data->vector = -1;
+
+ apic_debug("ACK for vector %d\n", data->vector);
+ }
+
+ /*
+ * See if there is anything still pending. Don't forget that we may
+ * have entered this function with PEEK just to check pending
+ * status. This is really the only way we could ever find something
+ * still eligible, since otherwise we would have just injected
+ * the highest priority vector above
+ */
+ irq = apic_find_highest_irr(apic);
+ if ((irq & 0xf0) > apic_get_reg(apic, APIC_PROCPRI))
+ data->flags |= KVM_IRQACKDATA_VECTOR_PENDING;
+
+ out:
+ spin_unlock_bh(&apic->lock);
+
+ return 0;
+}
+
+static int apic_irqdev_set_pin(struct kvm_irqdevice *this, int irq, int level)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+ int lvt = 0;
+
+ spin_lock_bh(&apic->lock);
+
+ if (!apic_enabled(apic)) {
+ /*
+ * If the LAPIC is disabled, we simply forward the interrupt
+ * on to the output line
+ */
+ __apic_accept_irq(apic, APIC_DM_EXTINT, 0, level, 1);
+ goto out;
+ }
+
+ /*
+ * pin "0" is LINT0, and "1" is LINT1
+ */
+ BUG_ON(irq > 1);
+
+ switch(irq) {
+ case 0:
+ lvt = APIC_LVT0;
+ break;
+ case 1:
+ lvt = APIC_LVT1;
+ break;
+ }
+
+ if (apic_lvt_enabled(apic, lvt))
+ __apic_accept_irq(apic,
+ apic_lvt_dm(apic, lvt),
+ apic_lvt_vector(apic, lvt),
+ level,
+ 1);
+
+
+ out:
+ spin_unlock_bh(&apic->lock);
+
+ return 0;
+}
+
+static void apic_irqdev_destructor(struct kvm_irqdevice *this)
+{
+ struct kvm_kern_apic *apic = (struct kvm_kern_apic*)this->private;
+
+ apic_dropref(apic);
+}
+
+static void apic_irqdev_register(struct kvm_kern_apic *apic,
+ struct kvm_irqdevice *dev)
+{
+ dev->ack = apic_irqdev_ack;
+ dev->set_pin = apic_irqdev_set_pin;
+ dev->destructor = apic_irqdev_destructor;
+
+ dev->private = apic;
+ atomic_inc(&apic->ref_count);
+
+ apic->irq_dev = dev;
+}
+
+int kvm_lapic_init(struct kvm_vcpu *vcpu,
+ struct kvm_irqdevice *irq_dev, int flags)
+{
+ struct kvm_kern_apic *apic = NULL;
+ struct kvm_io_device *mmio_dev = NULL;
+
+ ASSERT(vcpu != NULL);
+ apic_debug("apic_init %d\n", vcpu_slot(vcpu));
+
+ apic = kzalloc(sizeof(*apic), GFP_KERNEL);
+ if (!apic)
+ goto nomem;
+
+ spin_lock_init(&apic->lock);
+ atomic_inc(&apic->ref_count);
+ apic->vcpu_id = vcpu_slot(vcpu);
+
+ apic->regs_page = alloc_page(GFP_KERNEL);
+ if ( apic->regs_page == NULL ) {
+ printk(KERN_ALERT "malloc apic regs error for vcpu %x\n",
+ vcpu_slot(vcpu));
+ goto nomem;
+ }
+ apic->regs = page_address(apic->regs_page);
+ memset(apic->regs, 0, PAGE_SIZE);
+
+ apic->vcpu = vcpu;
+ vcpu->apic.dev = apic;
+
+ if (!(flags & KVM_LAPIC_OPTION_USERMODE)) {
+ apic_irqdev_register(apic, irq_dev);
+ apic_mmio_register(apic);
+ } else
+ apic->usermode = 1;
+
+ hrtimer_init(&apic->timer.dev, CLOCK_MONOTONIC, HRTIMER_MODE_ABS);
+ apic->timer.dev.function = apic_timer_fn;
+
+ kvm_lapic_reset(vcpu);
+ return 0;
+
+ nomem:
+ if (mmio_dev)
+ kfree(mmio_dev);
+
+ if (apic)
+ apic_dropref(apic);
+
+ return -ENOMEM;
+}
+
+void kvm_lapic_destroy(struct kvm_vcpu *vcpu)
+{
+ struct kvm_kern_apic *apic = vcpu->apic.dev;
+
+ if (vcpu->apic.mmio)
+ kvm_iodevice_destructor(vcpu->apic.mmio);
+
+ apic_dropref(apic);
+}
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c
index c79bfc0..55fdae2 100644
--- a/drivers/kvm/svm.c
+++ b/drivers/kvm/svm.c
@@ -570,9 +570,6 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu)
fx_init(vcpu);
vcpu->fpu_active = 1;
- vcpu->apic_base = 0xfee00000 |
- /*for vcpu 0*/ MSR_IA32_APICBASE_BSP |
- MSR_IA32_APICBASE_ENABLE;
return 0;
@@ -1410,9 +1407,9 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
r = kvm_vcpu_irq_pop(vcpu, &ack);
break;
case kvm_irqpin_extint:
- printk(KERN_WARNING "KVM: external-interrupts not " \
- "handled yet\n");
- __clear_bit(pin, &vcpu->irq.pending);
+ r = kvm_irqdevice_ack(&vcpu->kvm->isa_irq, 0, &ack);
+ if (!(ack.flags & KVM_IRQACKDATA_VECTOR_PENDING))
+ __clear_bit(pin, &vcpu->irq.pending);
break;
case kvm_irqpin_nmi:
/*
@@ -1501,8 +1498,8 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu,
(vcpu->interrupt_window_open &&
!kvm_vcpu_irq_pending(vcpu));
kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
- kvm_run->cr8 = vcpu->cr8;
- kvm_run->apic_base = vcpu->apic_base;
+ kvm_run->cr8 = kvm_lapic_get_tpr(vcpu);
+ kvm_run->apic_base = kvm_lapic_get_base(vcpu);
}
/*
diff --git a/drivers/kvm/userint.c b/drivers/kvm/userint.c
index a60707d..c6118b0 100644
--- a/drivers/kvm/userint.c
+++ b/drivers/kvm/userint.c
@@ -218,6 +218,12 @@ int kvm_user_irqdev_restore(struct kvm_irqdevice *this, void *data)
int kvm_userint_init(struct kvm_vcpu *vcpu)
{
- return kvm_user_irqdev_init(&vcpu->irq.dev);
+ int ret;
+
+ ret = kvm_user_irqdev_init(&vcpu->irq.dev);
+ if (ret < 0)
+ return ret;
+
+ return kvm_lapic_init(vcpu, NULL, KVM_LAPIC_OPTION_USERMODE);
}
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c
index 52206af..9834f35 100644
--- a/drivers/kvm/vmx.c
+++ b/drivers/kvm/vmx.c
@@ -1236,10 +1236,6 @@ static int vmx_vcpu_setup(struct kvm_vcpu *vcpu)
memset(vcpu->regs, 0, sizeof(vcpu->regs));
vcpu->regs[VCPU_REGS_RDX] = get_rdx_init_val();
- vcpu->cr8 = 0;
- vcpu->apic_base = 0xfee00000 |
- /*for vcpu 0*/ MSR_IA32_APICBASE_BSP |
- MSR_IA32_APICBASE_ENABLE;
fx_init(vcpu);
@@ -1480,9 +1476,9 @@ static void do_intr_requests(struct kvm_vcpu *vcpu,
r = kvm_vcpu_irq_pop(vcpu, &ack);
break;
case kvm_irqpin_extint:
- printk(KERN_WARNING "KVM: external-interrupts not " \
- "handled yet\n");
- __clear_bit(pin, &vcpu->irq.pending);
+ r = kvm_irqdevice_ack(&vcpu->kvm->isa_irq, 0, &ack);
+ if (!(ack.flags & KVM_IRQACKDATA_VECTOR_PENDING))
+ __clear_bit(pin, &vcpu->irq.pending);
break;
case kvm_irqpin_nmi:
/*
@@ -1843,7 +1839,7 @@ static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
return 1;
case 8:
vcpu_load_rsp_rip(vcpu);
- vcpu->regs[reg] = vcpu->cr8;
+ vcpu->regs[reg] = kvm_lapic_get_tpr(vcpu);
vcpu_put_rsp_rip(vcpu);
skip_emulated_instruction(vcpu);
return 1;
@@ -1940,8 +1936,8 @@ static void post_kvm_run_save(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
kvm_run->if_flag = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) != 0;
- kvm_run->cr8 = vcpu->cr8;
- kvm_run->apic_base = vcpu->apic_base;
+ kvm_run->cr8 = kvm_lapic_get_tpr(vcpu);
+ kvm_run->apic_base = kvm_lapic_get_base(vcpu);
kvm_run->ready_for_interrupt_injection =
(vcpu->interrupt_window_open &&
!kvm_vcpu_irq_pending(vcpu));
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index e6edca8..aaa826e 100644
--- a/include/linux/kvm.h
+++ b/include/linux/kvm.h
@@ -231,6 +231,17 @@ struct kvm_dirty_log {
};
};
+/* for KVM_APIC */
+struct kvm_apic_msg {
+ /* in */
+ __u32 dest;
+ __u32 trig_mode;
+ __u32 dest_mode;
+ __u32 delivery_mode;
+ __u32 vector;
+ __u32 padding;
+};
+
struct kvm_cpuid_entry {
__u32 function;
__u32 eax;
@@ -282,6 +293,9 @@ struct kvm_signal_mask {
#define KVM_CREATE_VCPU _IO(KVMIO, 0x41)
#define KVM_GET_DIRTY_LOG _IOW(KVMIO, 0x42, struct kvm_dirty_log)
#define KVM_SET_MEMORY_ALIAS _IOW(KVMIO, 0x43, struct kvm_memory_alias)
+#define KVM_ENABLE_KERNEL_PIC _IOW(KVMIO, 0x44, __u32)
+#define KVM_ISA_INTERRUPT _IOW(KVMIO, 0x45, struct kvm_interrupt)
+#define KVM_APIC_MSG _IOW(KVMIO, 0x46, struct kvm_apic_msg)
/*
* ioctls for vcpu fds
@@ -300,5 +314,6 @@ struct kvm_signal_mask {
#define KVM_SET_SIGNAL_MASK _IOW(KVMIO, 0x8b, struct kvm_signal_mask)
#define KVM_GET_FPU _IOR(KVMIO, 0x8c, struct kvm_fpu)
#define KVM_SET_FPU _IOW(KVMIO, 0x8d, struct kvm_fpu)
+#define KVM_APIC_RESET _IO(KVMIO, 0x8e)
#endif
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