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-rw-r--r--virt/kvm/assigned-dev.c15
-rw-r--r--virt/kvm/eventfd.c23
-rw-r--r--virt/kvm/ioapic.c19
-rw-r--r--virt/kvm/ioapic.h4
-rw-r--r--virt/kvm/irq_comm.c31
-rw-r--r--virt/kvm/kvm_main.c39
6 files changed, 75 insertions, 56 deletions
diff --git a/virt/kvm/assigned-dev.c b/virt/kvm/assigned-dev.c
index b1e091ae2f3..23a41a9f8db 100644
--- a/virt/kvm/assigned-dev.c
+++ b/virt/kvm/assigned-dev.c
@@ -334,6 +334,11 @@ static int assigned_device_enable_host_intx(struct kvm *kvm,
}
#ifdef __KVM_HAVE_MSI
+static irqreturn_t kvm_assigned_dev_msi(int irq, void *dev_id)
+{
+ return IRQ_WAKE_THREAD;
+}
+
static int assigned_device_enable_host_msi(struct kvm *kvm,
struct kvm_assigned_dev_kernel *dev)
{
@@ -346,7 +351,7 @@ static int assigned_device_enable_host_msi(struct kvm *kvm,
}
dev->host_irq = dev->dev->irq;
- if (request_threaded_irq(dev->host_irq, NULL,
+ if (request_threaded_irq(dev->host_irq, kvm_assigned_dev_msi,
kvm_assigned_dev_thread_msi, 0,
dev->irq_name, dev)) {
pci_disable_msi(dev->dev);
@@ -358,6 +363,11 @@ static int assigned_device_enable_host_msi(struct kvm *kvm,
#endif
#ifdef __KVM_HAVE_MSIX
+static irqreturn_t kvm_assigned_dev_msix(int irq, void *dev_id)
+{
+ return IRQ_WAKE_THREAD;
+}
+
static int assigned_device_enable_host_msix(struct kvm *kvm,
struct kvm_assigned_dev_kernel *dev)
{
@@ -374,7 +384,8 @@ static int assigned_device_enable_host_msix(struct kvm *kvm,
for (i = 0; i < dev->entries_nr; i++) {
r = request_threaded_irq(dev->host_msix_entries[i].vector,
- NULL, kvm_assigned_dev_thread_msix,
+ kvm_assigned_dev_msix,
+ kvm_assigned_dev_thread_msix,
0, dev->irq_name, dev);
if (r)
goto err;
diff --git a/virt/kvm/eventfd.c b/virt/kvm/eventfd.c
index f59c1e8de7a..7d7e2aaffec 100644
--- a/virt/kvm/eventfd.c
+++ b/virt/kvm/eventfd.c
@@ -198,7 +198,7 @@ static void irqfd_update(struct kvm *kvm, struct _irqfd *irqfd,
}
static int
-kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
+kvm_irqfd_assign(struct kvm *kvm, struct kvm_irqfd *args)
{
struct kvm_irq_routing_table *irq_rt;
struct _irqfd *irqfd, *tmp;
@@ -212,12 +212,12 @@ kvm_irqfd_assign(struct kvm *kvm, int fd, int gsi)
return -ENOMEM;
irqfd->kvm = kvm;
- irqfd->gsi = gsi;
+ irqfd->gsi = args->gsi;
INIT_LIST_HEAD(&irqfd->list);
INIT_WORK(&irqfd->inject, irqfd_inject);
INIT_WORK(&irqfd->shutdown, irqfd_shutdown);
- file = eventfd_fget(fd);
+ file = eventfd_fget(args->fd);
if (IS_ERR(file)) {
ret = PTR_ERR(file);
goto fail;
@@ -298,19 +298,19 @@ kvm_eventfd_init(struct kvm *kvm)
* shutdown any irqfd's that match fd+gsi
*/
static int
-kvm_irqfd_deassign(struct kvm *kvm, int fd, int gsi)
+kvm_irqfd_deassign(struct kvm *kvm, struct kvm_irqfd *args)
{
struct _irqfd *irqfd, *tmp;
struct eventfd_ctx *eventfd;
- eventfd = eventfd_ctx_fdget(fd);
+ eventfd = eventfd_ctx_fdget(args->fd);
if (IS_ERR(eventfd))
return PTR_ERR(eventfd);
spin_lock_irq(&kvm->irqfds.lock);
list_for_each_entry_safe(irqfd, tmp, &kvm->irqfds.items, list) {
- if (irqfd->eventfd == eventfd && irqfd->gsi == gsi) {
+ if (irqfd->eventfd == eventfd && irqfd->gsi == args->gsi) {
/*
* This rcu_assign_pointer is needed for when
* another thread calls kvm_irq_routing_update before
@@ -338,12 +338,15 @@ kvm_irqfd_deassign(struct kvm *kvm, int fd, int gsi)
}
int
-kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags)
+kvm_irqfd(struct kvm *kvm, struct kvm_irqfd *args)
{
- if (flags & KVM_IRQFD_FLAG_DEASSIGN)
- return kvm_irqfd_deassign(kvm, fd, gsi);
+ if (args->flags & ~KVM_IRQFD_FLAG_DEASSIGN)
+ return -EINVAL;
+
+ if (args->flags & KVM_IRQFD_FLAG_DEASSIGN)
+ return kvm_irqfd_deassign(kvm, args);
- return kvm_irqfd_assign(kvm, fd, gsi);
+ return kvm_irqfd_assign(kvm, args);
}
/*
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
index 26fd54dc459..ef61d529a6c 100644
--- a/virt/kvm/ioapic.c
+++ b/virt/kvm/ioapic.c
@@ -191,7 +191,8 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq)
return kvm_irq_delivery_to_apic(ioapic->kvm, NULL, &irqe);
}
-int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
+int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
+ int level)
{
u32 old_irr;
u32 mask = 1 << irq;
@@ -201,9 +202,11 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
spin_lock(&ioapic->lock);
old_irr = ioapic->irr;
if (irq >= 0 && irq < IOAPIC_NUM_PINS) {
+ int irq_level = __kvm_irq_line_state(&ioapic->irq_states[irq],
+ irq_source_id, level);
entry = ioapic->redirtbl[irq];
- level ^= entry.fields.polarity;
- if (!level)
+ irq_level ^= entry.fields.polarity;
+ if (!irq_level)
ioapic->irr &= ~mask;
else {
int edge = (entry.fields.trig_mode == IOAPIC_EDGE_TRIG);
@@ -221,6 +224,16 @@ int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level)
return ret;
}
+void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id)
+{
+ int i;
+
+ spin_lock(&ioapic->lock);
+ for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++)
+ __clear_bit(irq_source_id, &ioapic->irq_states[i]);
+ spin_unlock(&ioapic->lock);
+}
+
static void __kvm_ioapic_update_eoi(struct kvm_ioapic *ioapic, int vector,
int trigger_mode)
{
diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
index 32872a09b63..a30abfe6ed1 100644
--- a/virt/kvm/ioapic.h
+++ b/virt/kvm/ioapic.h
@@ -74,7 +74,9 @@ void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode);
bool kvm_ioapic_handles_vector(struct kvm *kvm, int vector);
int kvm_ioapic_init(struct kvm *kvm);
void kvm_ioapic_destroy(struct kvm *kvm);
-int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level);
+int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
+ int level);
+void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
void kvm_ioapic_reset(struct kvm_ioapic *ioapic);
int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
struct kvm_lapic_irq *irq);
diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
index 5afb4311402..83402d74a76 100644
--- a/virt/kvm/irq_comm.c
+++ b/virt/kvm/irq_comm.c
@@ -33,26 +33,12 @@
#include "ioapic.h"
-static inline int kvm_irq_line_state(unsigned long *irq_state,
- int irq_source_id, int level)
-{
- /* Logical OR for level trig interrupt */
- if (level)
- set_bit(irq_source_id, irq_state);
- else
- clear_bit(irq_source_id, irq_state);
-
- return !!(*irq_state);
-}
-
static int kvm_set_pic_irq(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level)
{
#ifdef CONFIG_X86
struct kvm_pic *pic = pic_irqchip(kvm);
- level = kvm_irq_line_state(&pic->irq_states[e->irqchip.pin],
- irq_source_id, level);
- return kvm_pic_set_irq(pic, e->irqchip.pin, level);
+ return kvm_pic_set_irq(pic, e->irqchip.pin, irq_source_id, level);
#else
return -1;
#endif
@@ -62,10 +48,7 @@ static int kvm_set_ioapic_irq(struct kvm_kernel_irq_routing_entry *e,
struct kvm *kvm, int irq_source_id, int level)
{
struct kvm_ioapic *ioapic = kvm->arch.vioapic;
- level = kvm_irq_line_state(&ioapic->irq_states[e->irqchip.pin],
- irq_source_id, level);
-
- return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, level);
+ return kvm_ioapic_set_irq(ioapic, e->irqchip.pin, irq_source_id, level);
}
inline static bool kvm_is_dm_lowest_prio(struct kvm_lapic_irq *irq)
@@ -249,8 +232,6 @@ unlock:
void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
{
- int i;
-
ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID);
mutex_lock(&kvm->irq_lock);
@@ -263,14 +244,10 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id)
if (!irqchip_in_kernel(kvm))
goto unlock;
- for (i = 0; i < KVM_IOAPIC_NUM_PINS; i++) {
- clear_bit(irq_source_id, &kvm->arch.vioapic->irq_states[i]);
- if (i >= 16)
- continue;
+ kvm_ioapic_clear_all(kvm->arch.vioapic, irq_source_id);
#ifdef CONFIG_X86
- clear_bit(irq_source_id, &pic_irqchip(kvm)->irq_states[i]);
+ kvm_pic_clear_all(pic_irqchip(kvm), irq_source_id);
#endif
- }
unlock:
mutex_unlock(&kvm->irq_lock);
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 7e140683ff1..246852397e3 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -516,16 +516,32 @@ out_err_nodisable:
return ERR_PTR(r);
}
+/*
+ * Avoid using vmalloc for a small buffer.
+ * Should not be used when the size is statically known.
+ */
+void *kvm_kvzalloc(unsigned long size)
+{
+ if (size > PAGE_SIZE)
+ return vzalloc(size);
+ else
+ return kzalloc(size, GFP_KERNEL);
+}
+
+void kvm_kvfree(const void *addr)
+{
+ if (is_vmalloc_addr(addr))
+ vfree(addr);
+ else
+ kfree(addr);
+}
+
static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
{
if (!memslot->dirty_bitmap)
return;
- if (2 * kvm_dirty_bitmap_bytes(memslot) > PAGE_SIZE)
- vfree(memslot->dirty_bitmap);
- else
- kfree(memslot->dirty_bitmap);
-
+ kvm_kvfree(memslot->dirty_bitmap);
memslot->dirty_bitmap = NULL;
}
@@ -617,11 +633,7 @@ static int kvm_create_dirty_bitmap(struct kvm_memory_slot *memslot)
#ifndef CONFIG_S390
unsigned long dirty_bytes = 2 * kvm_dirty_bitmap_bytes(memslot);
- if (dirty_bytes > PAGE_SIZE)
- memslot->dirty_bitmap = vzalloc(dirty_bytes);
- else
- memslot->dirty_bitmap = kzalloc(dirty_bytes, GFP_KERNEL);
-
+ memslot->dirty_bitmap = kvm_kvzalloc(dirty_bytes);
if (!memslot->dirty_bitmap)
return -ENOMEM;
@@ -1586,7 +1598,7 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me)
*/
for (pass = 0; pass < 2 && !yielded; pass++) {
kvm_for_each_vcpu(i, vcpu, kvm) {
- if (!pass && i < last_boosted_vcpu) {
+ if (!pass && i <= last_boosted_vcpu) {
i = last_boosted_vcpu;
continue;
} else if (pass && i > last_boosted_vcpu)
@@ -2047,7 +2059,7 @@ static long kvm_vm_ioctl(struct file *filp,
r = -EFAULT;
if (copy_from_user(&data, argp, sizeof data))
goto out;
- r = kvm_irqfd(kvm, data.fd, data.gsi, data.flags);
+ r = kvm_irqfd(kvm, &data);
break;
}
case KVM_IOEVENTFD: {
@@ -2213,7 +2225,7 @@ static long kvm_dev_ioctl_check_extension_generic(long arg)
case KVM_CAP_SIGNAL_MSI:
#endif
return 1;
-#ifdef CONFIG_HAVE_KVM_IRQCHIP
+#ifdef KVM_CAP_IRQ_ROUTING
case KVM_CAP_IRQ_ROUTING:
return KVM_MAX_IRQ_ROUTES;
#endif
@@ -2845,6 +2857,7 @@ void kvm_exit(void)
kvm_arch_hardware_unsetup();
kvm_arch_exit();
free_cpumask_var(cpus_hardware_enabled);
+ __free_page(fault_page);
__free_page(hwpoison_page);
__free_page(bad_page);
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-21 12:59:08 +0000