#include <asm/uaccess.h>
#include <asm/pgtable.h>
-#ifdef CONFIG_X86
-#include <asm/msidef.h>
-#endif
-
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
#include "coalesced_mmio.h"
#endif
static bool kvm_rebooting;
#ifdef KVM_CAP_DEVICE_ASSIGNMENT
-
-#ifdef CONFIG_X86
-static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev)
-{
- int vcpu_id;
- struct kvm_vcpu *vcpu;
- struct kvm_ioapic *ioapic = ioapic_irqchip(dev->kvm);
- int dest_id = (dev->guest_msi.address_lo & MSI_ADDR_DEST_ID_MASK)
- >> MSI_ADDR_DEST_ID_SHIFT;
- int vector = (dev->guest_msi.data & MSI_DATA_VECTOR_MASK)
- >> MSI_DATA_VECTOR_SHIFT;
- int dest_mode = test_bit(MSI_ADDR_DEST_MODE_SHIFT,
- (unsigned long *)&dev->guest_msi.address_lo);
- int trig_mode = test_bit(MSI_DATA_TRIGGER_SHIFT,
- (unsigned long *)&dev->guest_msi.data);
- int delivery_mode = test_bit(MSI_DATA_DELIVERY_MODE_SHIFT,
- (unsigned long *)&dev->guest_msi.data);
- u32 deliver_bitmask;
-
- BUG_ON(!ioapic);
-
- deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic,
- dest_id, dest_mode);
- /* IOAPIC delivery mode value is the same as MSI here */
- switch (delivery_mode) {
- case IOAPIC_LOWEST_PRIORITY:
- vcpu = kvm_get_lowest_prio_vcpu(ioapic->kvm, vector,
- deliver_bitmask);
- if (vcpu != NULL)
- kvm_apic_set_irq(vcpu, vector, trig_mode);
- else
- printk(KERN_INFO "kvm: null lowest priority vcpu!\n");
- break;
- case IOAPIC_FIXED:
- for (vcpu_id = 0; deliver_bitmask != 0; vcpu_id++) {
- if (!(deliver_bitmask & (1 << vcpu_id)))
- continue;
- deliver_bitmask &= ~(1 << vcpu_id);
- vcpu = ioapic->kvm->vcpus[vcpu_id];
- if (vcpu)
- kvm_apic_set_irq(vcpu, vector, trig_mode);
- }
- break;
- default:
- printk(KERN_INFO "kvm: unsupported MSI delivery mode\n");
- }
-}
-#else
-static void assigned_device_msi_dispatch(struct kvm_assigned_dev_kernel *dev) {}
-#endif
-
static struct kvm_assigned_dev_kernel *kvm_find_assigned_dev(struct list_head *head,
int assigned_dev_id)
{
* finer-grained lock, update this
*/
mutex_lock(&assigned_dev->kvm->lock);
- if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_INTX)
- kvm_set_irq(assigned_dev->kvm,
- assigned_dev->irq_source_id,
- assigned_dev->guest_irq, 1);
- else if (assigned_dev->irq_requested_type &
- KVM_ASSIGNED_DEV_GUEST_MSI) {
- assigned_device_msi_dispatch(assigned_dev);
+ kvm_set_irq(assigned_dev->kvm, assigned_dev->irq_source_id,
+ assigned_dev->guest_irq, 1);
+
+ if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_MSI) {
enable_irq(assigned_dev->host_irq);
assigned_dev->host_irq_disabled = false;
}
mutex_unlock(&assigned_dev->kvm->lock);
- kvm_put_kvm(assigned_dev->kvm);
}
static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id)
struct kvm_assigned_dev_kernel *assigned_dev =
(struct kvm_assigned_dev_kernel *) dev_id;
- kvm_get_kvm(assigned_dev->kvm);
-
schedule_work(&assigned_dev->interrupt_work);
disable_irq_nosync(irq);
}
}
+/* The function implicit hold kvm->lock mutex due to cancel_work_sync() */
static void kvm_free_assigned_irq(struct kvm *kvm,
struct kvm_assigned_dev_kernel *assigned_dev)
{
if (!assigned_dev->irq_requested_type)
return;
- if (cancel_work_sync(&assigned_dev->interrupt_work))
- /* We had pending work. That means we will have to take
- * care of kvm_put_kvm.
- */
- kvm_put_kvm(kvm);
+ /*
+ * In kvm_free_device_irq, cancel_work_sync return true if:
+ * 1. work is scheduled, and then cancelled.
+ * 2. work callback is executed.
+ *
+ * The first one ensured that the irq is disabled and no more events
+ * would happen. But for the second one, the irq may be enabled (e.g.
+ * for MSI). So we disable irq here to prevent further events.
+ *
+ * Notice this maybe result in nested disable if the interrupt type is
+ * INTx, but it's OK for we are going to free it.
+ *
+ * If this function is a part of VM destroy, please ensure that till
+ * now, the kvm state is still legal for probably we also have to wait
+ * interrupt_work done.
+ */
+ disable_irq_nosync(assigned_dev->host_irq);
+ cancel_work_sync(&assigned_dev->interrupt_work);
free_irq(assigned_dev->host_irq, (void *)assigned_dev);
if (irqchip_in_kernel(kvm)) {
if (!msi2intx &&
- adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) {
- free_irq(adev->host_irq, (void *)kvm);
+ (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)) {
+ free_irq(adev->host_irq, (void *)adev);
pci_disable_msi(adev->dev);
}
{
int r;
+ adev->guest_irq = airq->guest_irq;
if (airq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI) {
/* x86 don't care upper address of guest msi message addr */
adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_MSI;
adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_INTX;
- adev->guest_msi.address_lo = airq->guest_msi.addr_lo;
- adev->guest_msi.data = airq->guest_msi.data;
adev->ack_notifier.gsi = -1;
} else if (msi2intx) {
adev->irq_requested_type |= KVM_ASSIGNED_DEV_GUEST_INTX;
adev->irq_requested_type &= ~KVM_ASSIGNED_DEV_GUEST_MSI;
- adev->guest_irq = airq->guest_irq;
adev->ack_notifier.gsi = airq->guest_irq;
+ } else {
+ /*
+ * Guest require to disable device MSI, we disable MSI and
+ * re-enable INTx by default again. Notice it's only for
+ * non-msi2intx.
+ */
+ assigned_device_update_intx(kvm, adev, airq);
+ return 0;
}
if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI)
{
int r = 0;
struct kvm_assigned_dev_kernel *match;
+ u32 current_flags = 0, changed_flags;
mutex_lock(&kvm->lock);
}
}
- if ((!msi2intx &&
- (assigned_irq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI)) ||
+ if ((match->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) &&
+ (match->irq_requested_type & KVM_ASSIGNED_DEV_GUEST_MSI))
+ current_flags |= KVM_DEV_IRQ_ASSIGN_ENABLE_MSI;
+
+ changed_flags = assigned_irq->flags ^ current_flags;
+
+ if ((changed_flags & KVM_DEV_IRQ_ASSIGN_MSI_ACTION) ||
(msi2intx && match->dev->msi_enabled)) {
#ifdef CONFIG_X86
r = assigned_device_update_msi(kvm, match, assigned_irq);
struct kvm_assigned_dev_kernel *match;
struct pci_dev *dev;
+ down_read(&kvm->slots_lock);
mutex_lock(&kvm->lock);
match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head,
out:
mutex_unlock(&kvm->lock);
+ up_read(&kvm->slots_lock);
return r;
out_list_del:
list_del(&match->list);
out_free:
kfree(match);
mutex_unlock(&kvm->lock);
+ up_read(&kvm->slots_lock);
return r;
}
#endif
goto out;
}
- if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
+ if (match->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU)
kvm_deassign_device(kvm, match);
kvm_free_assigned_device(kvm, match);
inline int kvm_is_mmio_pfn(pfn_t pfn)
{
- if (pfn_valid(pfn))
- return PageReserved(pfn_to_page(pfn));
+ if (pfn_valid(pfn)) {
+ struct page *page = compound_head(pfn_to_page(pfn));
+ return PageReserved(page);
+ }
return true;
}
return young;
}
+static void kvm_mmu_notifier_release(struct mmu_notifier *mn,
+ struct mm_struct *mm)
+{
+ struct kvm *kvm = mmu_notifier_to_kvm(mn);
+ kvm_arch_flush_shadow(kvm);
+}
+
static const struct mmu_notifier_ops kvm_mmu_notifier_ops = {
.invalidate_page = kvm_mmu_notifier_invalidate_page,
.invalidate_range_start = kvm_mmu_notifier_invalidate_range_start,
.invalidate_range_end = kvm_mmu_notifier_invalidate_range_end,
.clear_flush_young = kvm_mmu_notifier_clear_flush_young,
+ .release = kvm_mmu_notifier_release,
};
#endif /* CONFIG_MMU_NOTIFIER && KVM_ARCH_WANT_MMU_NOTIFIER */
if (IS_ERR(kvm))
goto out;
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
+ INIT_LIST_HEAD(&kvm->irq_routing);
+ INIT_HLIST_HEAD(&kvm->mask_notifier_list);
+#endif
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
page = alloc_page(GFP_KERNEL | __GFP_ZERO);
{
struct mm_struct *mm = kvm->mm;
+ kvm_arch_sync_events(kvm);
spin_lock(&kvm_lock);
list_del(&kvm->vm_list);
spin_unlock(&kvm_lock);
+ kvm_free_irq_routing(kvm);
kvm_io_bus_destroy(&kvm->pio_bus);
kvm_io_bus_destroy(&kvm->mmio_bus);
#ifdef KVM_COALESCED_MMIO_PAGE_OFFSET
int r;
gfn_t base_gfn;
unsigned long npages;
+ int largepages;
unsigned long i;
struct kvm_memory_slot *memslot;
struct kvm_memory_slot old, new;
for (i = 0; i < KVM_MEMORY_SLOTS; ++i) {
struct kvm_memory_slot *s = &kvm->memslots[i];
- if (s == memslot)
+ if (s == memslot || !s->npages)
continue;
if (!((base_gfn + npages <= s->base_gfn) ||
(base_gfn >= s->base_gfn + s->npages)))
new.userspace_addr = 0;
}
if (npages && !new.lpage_info) {
- int largepages = npages / KVM_PAGES_PER_HPAGE;
- if (npages % KVM_PAGES_PER_HPAGE)
- largepages++;
- if (base_gfn % KVM_PAGES_PER_HPAGE)
- largepages++;
+ largepages = 1 + (base_gfn + npages - 1) / KVM_PAGES_PER_HPAGE;
+ largepages -= base_gfn / KVM_PAGES_PER_HPAGE;
new.lpage_info = vmalloc(largepages * sizeof(*new.lpage_info));
r = 0;
break;
}
- case KVM_DEBUG_GUEST: {
- struct kvm_debug_guest dbg;
+ case KVM_SET_GUEST_DEBUG: {
+ struct kvm_guest_debug dbg;
r = -EFAULT;
if (copy_from_user(&dbg, argp, sizeof dbg))
goto out;
- r = kvm_arch_vcpu_ioctl_debug_guest(vcpu, &dbg);
+ r = kvm_arch_vcpu_ioctl_set_guest_debug(vcpu, &dbg);
if (r)
goto out;
r = 0;
break;
}
#endif
+#ifdef KVM_CAP_IRQ_ROUTING
+ case KVM_SET_GSI_ROUTING: {
+ struct kvm_irq_routing routing;
+ struct kvm_irq_routing __user *urouting;
+ struct kvm_irq_routing_entry *entries;
+
+ r = -EFAULT;
+ if (copy_from_user(&routing, argp, sizeof(routing)))
+ goto out;
+ r = -EINVAL;
+ if (routing.nr >= KVM_MAX_IRQ_ROUTES)
+ goto out;
+ if (routing.flags)
+ goto out;
+ r = -ENOMEM;
+ entries = vmalloc(routing.nr * sizeof(*entries));
+ if (!entries)
+ goto out;
+ r = -EFAULT;
+ urouting = argp;
+ if (copy_from_user(entries, urouting->entries,
+ routing.nr * sizeof(*entries)))
+ goto out_free_irq_routing;
+ r = kvm_set_irq_routing(kvm, entries, routing.nr,
+ routing.flags);
+ out_free_irq_routing:
+ vfree(entries);
+ break;
+ }
+#endif
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
}
switch (arg) {
case KVM_CAP_USER_MEMORY:
case KVM_CAP_DESTROY_MEMORY_REGION_WORKS:
+ case KVM_CAP_JOIN_MEMORY_REGIONS_WORKS:
return 1;
+#ifdef CONFIG_HAVE_KVM_IRQCHIP
+ case KVM_CAP_IRQ_ROUTING:
+ return KVM_MAX_IRQ_ROUTES;
+#endif
default:
break;
}
bad_pfn = page_to_pfn(bad_page);
- if (!alloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) {
+ if (!zalloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) {
r = -ENOMEM;
goto out_free_0;
}
+ cpumask_clear(cpus_hardware_enabled);
r = kvm_arch_hardware_setup();
if (r < 0)
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff