diff options
Diffstat (limited to 'virt/kvm')
| -rw-r--r-- | virt/kvm/ioapic.c | 8 | ||||
| -rw-r--r-- | virt/kvm/ioapic.h | 2 | ||||
| -rw-r--r-- | virt/kvm/iommu.c (renamed from virt/kvm/vtd.c) | 135 | ||||
| -rw-r--r-- | virt/kvm/irq_comm.c | 19 | ||||
| -rw-r--r-- | virt/kvm/kvm_main.c | 470 | ||||
| -rw-r--r-- | virt/kvm/kvm_trace.c | 1 |
6 files changed, 474 insertions, 161 deletions
diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c index 53772bb4632..23b81cf242a 100644 --- a/virt/kvm/ioapic.c +++ b/virt/kvm/ioapic.c @@ -150,10 +150,11 @@ static int ioapic_inj_irq(struct kvm_ioapic *ioapic, static void ioapic_inj_nmi(struct kvm_vcpu *vcpu) { kvm_inject_nmi(vcpu); + kvm_vcpu_kick(vcpu); } -static u32 ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest, - u8 dest_mode) +u32 kvm_ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest, + u8 dest_mode) { u32 mask = 0; int i; @@ -207,7 +208,8 @@ static int ioapic_deliver(struct kvm_ioapic *ioapic, int irq) "vector=%x trig_mode=%x\n", dest, dest_mode, delivery_mode, vector, trig_mode); - deliver_bitmask = ioapic_get_delivery_bitmask(ioapic, dest, dest_mode); + deliver_bitmask = kvm_ioapic_get_delivery_bitmask(ioapic, dest, + dest_mode); if (!deliver_bitmask) { ioapic_debug("no target on destination\n"); return 0; diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h index cd7ae7691c9..49c9581d258 100644 --- a/virt/kvm/ioapic.h +++ b/virt/kvm/ioapic.h @@ -85,5 +85,7 @@ void kvm_ioapic_update_eoi(struct kvm *kvm, int vector, int trigger_mode); int kvm_ioapic_init(struct kvm *kvm); void kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int level); void kvm_ioapic_reset(struct kvm_ioapic *ioapic); +u32 kvm_ioapic_get_delivery_bitmask(struct kvm_ioapic *ioapic, u8 dest, + u8 dest_mode); #endif diff --git a/virt/kvm/vtd.c b/virt/kvm/iommu.c index a770874f3a3..e9693a29d00 100644 --- a/virt/kvm/vtd.c +++ b/virt/kvm/iommu.c @@ -25,6 +25,7 @@ #include <linux/kvm_host.h> #include <linux/pci.h> #include <linux/dmar.h> +#include <linux/iommu.h> #include <linux/intel-iommu.h> static int kvm_iommu_unmap_memslots(struct kvm *kvm); @@ -37,7 +38,7 @@ int kvm_iommu_map_pages(struct kvm *kvm, gfn_t gfn = base_gfn; pfn_t pfn; int i, r = 0; - struct dmar_domain *domain = kvm->arch.intel_iommu_domain; + struct iommu_domain *domain = kvm->arch.iommu_domain; /* check if iommu exists and in use */ if (!domain) @@ -45,20 +46,17 @@ int kvm_iommu_map_pages(struct kvm *kvm, for (i = 0; i < npages; i++) { /* check if already mapped */ - pfn = (pfn_t)intel_iommu_iova_to_pfn(domain, - gfn_to_gpa(gfn)); - if (pfn) + if (iommu_iova_to_phys(domain, gfn_to_gpa(gfn))) continue; pfn = gfn_to_pfn(kvm, gfn); - r = intel_iommu_page_mapping(domain, - gfn_to_gpa(gfn), - pfn_to_hpa(pfn), - PAGE_SIZE, - DMA_PTE_READ | - DMA_PTE_WRITE); + r = iommu_map_range(domain, + gfn_to_gpa(gfn), + pfn_to_hpa(pfn), + PAGE_SIZE, + IOMMU_READ | IOMMU_WRITE); if (r) { - printk(KERN_ERR "kvm_iommu_map_pages:" + printk(KERN_ERR "kvm_iommu_map_address:" "iommu failed to map pfn=%lx\n", pfn); goto unmap_pages; } @@ -73,7 +71,7 @@ unmap_pages: static int kvm_iommu_map_memslots(struct kvm *kvm) { - int i, r; + int i, r = 0; down_read(&kvm->slots_lock); for (i = 0; i < kvm->nmemslots; i++) { @@ -86,50 +84,79 @@ static int kvm_iommu_map_memslots(struct kvm *kvm) return r; } -int kvm_iommu_map_guest(struct kvm *kvm, - struct kvm_assigned_dev_kernel *assigned_dev) +int kvm_assign_device(struct kvm *kvm, + struct kvm_assigned_dev_kernel *assigned_dev) { struct pci_dev *pdev = NULL; + struct iommu_domain *domain = kvm->arch.iommu_domain; int r; - if (!intel_iommu_found()) { - printk(KERN_ERR "%s: intel iommu not found\n", __func__); + /* check if iommu exists and in use */ + if (!domain) + return 0; + + pdev = assigned_dev->dev; + if (pdev == NULL) return -ENODEV; + + r = iommu_attach_device(domain, &pdev->dev); + if (r) { + printk(KERN_ERR "assign device %x:%x.%x failed", + pdev->bus->number, + PCI_SLOT(pdev->devfn), + PCI_FUNC(pdev->devfn)); + return r; } - printk(KERN_DEBUG "VT-d direct map: host bdf = %x:%x:%x\n", - assigned_dev->host_busnr, - PCI_SLOT(assigned_dev->host_devfn), - PCI_FUNC(assigned_dev->host_devfn)); + printk(KERN_DEBUG "assign device: host bdf = %x:%x:%x\n", + assigned_dev->host_busnr, + PCI_SLOT(assigned_dev->host_devfn), + PCI_FUNC(assigned_dev->host_devfn)); + + return 0; +} + +int kvm_deassign_device(struct kvm *kvm, + struct kvm_assigned_dev_kernel *assigned_dev) +{ + struct iommu_domain *domain = kvm->arch.iommu_domain; + struct pci_dev *pdev = NULL; + + /* check if iommu exists and in use */ + if (!domain) + return 0; pdev = assigned_dev->dev; + if (pdev == NULL) + return -ENODEV; - if (pdev == NULL) { - if (kvm->arch.intel_iommu_domain) { - intel_iommu_domain_exit(kvm->arch.intel_iommu_domain); - kvm->arch.intel_iommu_domain = NULL; - } + iommu_detach_device(domain, &pdev->dev); + + printk(KERN_DEBUG "deassign device: host bdf = %x:%x:%x\n", + assigned_dev->host_busnr, + PCI_SLOT(assigned_dev->host_devfn), + PCI_FUNC(assigned_dev->host_devfn)); + + return 0; +} + +int kvm_iommu_map_guest(struct kvm *kvm) +{ + int r; + + if (!iommu_found()) { + printk(KERN_ERR "%s: iommu not found\n", __func__); return -ENODEV; } - kvm->arch.intel_iommu_domain = intel_iommu_domain_alloc(pdev); - if (!kvm->arch.intel_iommu_domain) - return -ENODEV; + kvm->arch.iommu_domain = iommu_domain_alloc(); + if (!kvm->arch.iommu_domain) + return -ENOMEM; r = kvm_iommu_map_memslots(kvm); if (r) goto out_unmap; - intel_iommu_detach_dev(kvm->arch.intel_iommu_domain, - pdev->bus->number, pdev->devfn); - - r = intel_iommu_context_mapping(kvm->arch.intel_iommu_domain, - pdev); - if (r) { - printk(KERN_ERR "Domain context map for %s failed", - pci_name(pdev)); - goto out_unmap; - } return 0; out_unmap: @@ -138,19 +165,26 @@ out_unmap: } static void kvm_iommu_put_pages(struct kvm *kvm, - gfn_t base_gfn, unsigned long npages) + gfn_t base_gfn, unsigned long npages) { gfn_t gfn = base_gfn; pfn_t pfn; - struct dmar_domain *domain = kvm->arch.intel_iommu_domain; - int i; + struct iommu_domain *domain = kvm->arch.iommu_domain; + unsigned long i; + u64 phys; + + /* check if iommu exists and in use */ + if (!domain) + return; for (i = 0; i < npages; i++) { - pfn = (pfn_t)intel_iommu_iova_to_pfn(domain, - gfn_to_gpa(gfn)); + phys = iommu_iova_to_phys(domain, gfn_to_gpa(gfn)); + pfn = phys >> PAGE_SHIFT; kvm_release_pfn_clean(pfn); gfn++; } + + iommu_unmap_range(domain, gfn_to_gpa(base_gfn), PAGE_SIZE * npages); } static int kvm_iommu_unmap_memslots(struct kvm *kvm) @@ -168,24 +202,13 @@ static int kvm_iommu_unmap_memslots(struct kvm *kvm) int kvm_iommu_unmap_guest(struct kvm *kvm) { - struct kvm_assigned_dev_kernel *entry; - struct dmar_domain *domain = kvm->arch.intel_iommu_domain; + struct iommu_domain *domain = kvm->arch.iommu_domain; /* check if iommu exists and in use */ if (!domain) return 0; - list_for_each_entry(entry, &kvm->arch.assigned_dev_head, list) { - printk(KERN_DEBUG "VT-d unmap: host bdf = %x:%x:%x\n", - entry->host_busnr, - PCI_SLOT(entry->host_devfn), - PCI_FUNC(entry->host_devfn)); - - /* detach kvm dmar domain */ - intel_iommu_detach_dev(domain, entry->host_busnr, - entry->host_devfn); - } kvm_iommu_unmap_memslots(kvm); - intel_iommu_domain_exit(domain); + iommu_domain_free(domain); return 0; } diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c index 55ad76ee2d0..aa5d1e5c497 100644 --- a/virt/kvm/irq_comm.c +++ b/virt/kvm/irq_comm.c @@ -61,10 +61,9 @@ void kvm_register_irq_ack_notifier(struct kvm *kvm, hlist_add_head(&kian->link, &kvm->arch.irq_ack_notifier_list); } -void kvm_unregister_irq_ack_notifier(struct kvm *kvm, - struct kvm_irq_ack_notifier *kian) +void kvm_unregister_irq_ack_notifier(struct kvm_irq_ack_notifier *kian) { - hlist_del(&kian->link); + hlist_del_init(&kian->link); } /* The caller must hold kvm->lock mutex */ @@ -73,11 +72,15 @@ int kvm_request_irq_source_id(struct kvm *kvm) unsigned long *bitmap = &kvm->arch.irq_sources_bitmap; int irq_source_id = find_first_zero_bit(bitmap, sizeof(kvm->arch.irq_sources_bitmap)); + if (irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { printk(KERN_WARNING "kvm: exhaust allocatable IRQ sources!\n"); - irq_source_id = -EFAULT; - } else - set_bit(irq_source_id, bitmap); + return -EFAULT; + } + + ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); + set_bit(irq_source_id, bitmap); + return irq_source_id; } @@ -85,7 +88,9 @@ void kvm_free_irq_source_id(struct kvm *kvm, int irq_source_id) { int i; - if (irq_source_id <= 0 || + ASSERT(irq_source_id != KVM_USERSPACE_IRQ_SOURCE_ID); + + if (irq_source_id < 0 || irq_source_id >= sizeof(kvm->arch.irq_sources_bitmap)) { printk(KERN_ERR "kvm: IRQ source ID out of range!\n"); return; diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index a87f45edfae..3a5a08298aa 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -47,6 +47,10 @@ #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 @@ -60,10 +64,13 @@ MODULE_AUTHOR("Qumranet"); MODULE_LICENSE("GPL"); +static int msi2intx = 1; +module_param(msi2intx, bool, 0); + DEFINE_SPINLOCK(kvm_lock); LIST_HEAD(vm_list); -static cpumask_t cpus_hardware_enabled; +static cpumask_var_t cpus_hardware_enabled; struct kmem_cache *kvm_vcpu_cache; EXPORT_SYMBOL_GPL(kvm_vcpu_cache); @@ -75,9 +82,60 @@ struct dentry *kvm_debugfs_dir; static long kvm_vcpu_ioctl(struct file *file, unsigned int ioctl, unsigned long arg); -bool kvm_rebooting; +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) { @@ -104,9 +162,16 @@ static void kvm_assigned_dev_interrupt_work_handler(struct work_struct *work) * finer-grained lock, update this */ mutex_lock(&assigned_dev->kvm->lock); - 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_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); + enable_irq(assigned_dev->host_irq); + assigned_dev->host_irq_disabled = false; + } mutex_unlock(&assigned_dev->kvm->lock); kvm_put_kvm(assigned_dev->kvm); } @@ -117,8 +182,12 @@ static irqreturn_t kvm_assigned_dev_intr(int irq, void *dev_id) (struct kvm_assigned_dev_kernel *) dev_id; kvm_get_kvm(assigned_dev->kvm); + schedule_work(&assigned_dev->interrupt_work); + disable_irq_nosync(irq); + assigned_dev->host_irq_disabled = true; + return IRQ_HANDLED; } @@ -132,19 +201,32 @@ static void kvm_assigned_dev_ack_irq(struct kvm_irq_ack_notifier *kian) dev = container_of(kian, struct kvm_assigned_dev_kernel, ack_notifier); + kvm_set_irq(dev->kvm, dev->irq_source_id, dev->guest_irq, 0); - enable_irq(dev->host_irq); + + /* The guest irq may be shared so this ack may be + * from another device. + */ + if (dev->host_irq_disabled) { + enable_irq(dev->host_irq); + dev->host_irq_disabled = false; + } } -static void kvm_free_assigned_device(struct kvm *kvm, - struct kvm_assigned_dev_kernel - *assigned_dev) +static void kvm_free_assigned_irq(struct kvm *kvm, + struct kvm_assigned_dev_kernel *assigned_dev) { - if (irqchip_in_kernel(kvm) && assigned_dev->irq_requested) - free_irq(assigned_dev->host_irq, (void *)assigned_dev); + if (!irqchip_in_kernel(kvm)) + return; + + kvm_unregister_irq_ack_notifier(&assigned_dev->ack_notifier); - kvm_unregister_irq_ack_notifier(kvm, &assigned_dev->ack_notifier); - kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); + if (assigned_dev->irq_source_id != -1) + kvm_free_irq_source_id(kvm, assigned_dev->irq_source_id); + assigned_dev->irq_source_id = -1; + + 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 @@ -152,6 +234,23 @@ static void kvm_free_assigned_device(struct kvm *kvm, */ kvm_put_kvm(kvm); + free_irq(assigned_dev->host_irq, (void *)assigned_dev); + + if (assigned_dev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) + pci_disable_msi(assigned_dev->dev); + + assigned_dev->irq_requested_type = 0; +} + + +static void kvm_free_assigned_device(struct kvm *kvm, + struct kvm_assigned_dev_kernel + *assigned_dev) +{ + kvm_free_assigned_irq(kvm, assigned_dev); + + pci_reset_function(assigned_dev->dev); + pci_release_regions(assigned_dev->dev); pci_disable_device(assigned_dev->dev); pci_dev_put(assigned_dev->dev); @@ -174,6 +273,95 @@ void kvm_free_all_assigned_devices(struct kvm *kvm) } } +static int assigned_device_update_intx(struct kvm *kvm, + struct kvm_assigned_dev_kernel *adev, + struct kvm_assigned_irq *airq) +{ + adev->guest_irq = airq->guest_irq; + adev->ack_notifier.gsi = airq->guest_irq; + + if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_INTX) + return 0; + + if (irqchip_in_kernel(kvm)) { + if (!msi2intx && + adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) { + free_irq(adev->host_irq, (void *)kvm); + pci_disable_msi(adev->dev); + } + + if (!capable(CAP_SYS_RAWIO)) + return -EPERM; + + if (airq->host_irq) + adev->host_irq = airq->host_irq; + else + adev->host_irq = adev->dev->irq; + + /* Even though this is PCI, we don't want to use shared + * interrupts. Sharing host devices with guest-assigned devices + * on the same interrupt line is not a happy situation: there + * are going to be long delays in accepting, acking, etc. + */ + if (request_irq(adev->host_irq, kvm_assigned_dev_intr, + 0, "kvm_assigned_intx_device", (void *)adev)) + return -EIO; + } + + adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_INTX | + KVM_ASSIGNED_DEV_HOST_INTX; + return 0; +} + +#ifdef CONFIG_X86 +static int assigned_device_update_msi(struct kvm *kvm, + struct kvm_assigned_dev_kernel *adev, + struct kvm_assigned_irq *airq) +{ + int r; + + 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; + } + + if (adev->irq_requested_type & KVM_ASSIGNED_DEV_HOST_MSI) + return 0; + + if (irqchip_in_kernel(kvm)) { + if (!msi2intx) { + if (adev->irq_requested_type & + KVM_ASSIGNED_DEV_HOST_INTX) + free_irq(adev->host_irq, (void *)adev); + + r = pci_enable_msi(adev->dev); + if (r) + return r; + } + + adev->host_irq = adev->dev->irq; + if (request_irq(adev->host_irq, kvm_assigned_dev_intr, 0, + "kvm_assigned_msi_device", (void *)adev)) + return -EIO; + } + + if (!msi2intx) + adev->irq_requested_type = KVM_ASSIGNED_DEV_GUEST_MSI; + + adev->irq_requested_type |= KVM_ASSIGNED_DEV_HOST_MSI; + return 0; +} +#endif + static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, struct kvm_assigned_irq *assigned_irq) @@ -190,49 +378,68 @@ static int kvm_vm_ioctl_assign_irq(struct kvm *kvm, return -EINVAL; } - if (match->irq_requested) { - match->guest_irq = assigned_irq->guest_irq; - match->ack_notifier.gsi = assigned_irq->guest_irq; - mutex_unlock(&kvm->lock); - return 0; - } + if (!match->irq_requested_type) { + INIT_WORK(&match->interrupt_work, + kvm_assigned_dev_interrupt_work_handler); + if (irqchip_in_kernel(kvm)) { + /* Register ack nofitier */ + match->ack_notifier.gsi = -1; + match->ack_notifier.irq_acked = + kvm_assigned_dev_ack_irq; + kvm_register_irq_ack_notifier(kvm, + &match->ack_notifier); + + /* Request IRQ source ID */ + r = kvm_request_irq_source_id(kvm); + if (r < 0) + goto out_release; + else + match->irq_source_id = r; - INIT_WORK(&match->interrupt_work, - kvm_assigned_dev_interrupt_work_handler); +#ifdef CONFIG_X86 + /* Determine host device irq type, we can know the + * result from dev->msi_enabled */ + if (msi2intx) + pci_enable_msi(match->dev); +#endif + } + } - if (irqchip_in_kernel(kvm)) { - if (!capable(CAP_SYS_RAWIO)) { - r = -EPERM; + if ((!msi2intx && + (assigned_irq->flags & KVM_DEV_IRQ_ASSIGN_ENABLE_MSI)) || + (msi2intx && match->dev->msi_enabled)) { +#ifdef CONFIG_X86 + r = assigned_device_update_msi(kvm, match, assigned_irq); + if (r) { + printk(KERN_WARNING "kvm: failed to enable " + "MSI device!\n"); goto out_release; } - - if (assigned_irq->host_irq) - match->host_irq = assigned_irq->host_irq; - else - match->host_irq = match->dev->irq; - match->guest_irq = assigned_irq->guest_irq; - match->ack_notifier.gsi = assigned_irq->guest_irq; - match->ack_notifier.irq_acked = kvm_assigned_dev_ack_irq; - kvm_register_irq_ack_notifier(kvm, &match->ack_notifier); - r = kvm_request_irq_source_id(kvm); - if (r < 0) +#else + r = -ENOTTY; +#endif + } else if (assigned_irq->host_irq == 0 && match->dev->irq == 0) { + /* Host device IRQ 0 means don't support INTx */ + if (!msi2intx) { + printk(KERN_WARNING + "kvm: wait device to enable MSI!\n"); + r = 0; + } else { + printk(KERN_WARNING + "kvm: failed to enable MSI device!\n"); + r = -ENOTTY; goto out_release; - else - match->irq_source_id = r; - - /* Even though this is PCI, we don't want to use shared - * interrupts. Sharing host devices with guest-assigned devices - * on the same interrupt line is not a happy situation: there - * are going to be long delays in accepting, acking, etc. - */ - if (request_irq(match->host_irq, kvm_assigned_dev_intr, 0, - "kvm_assigned_device", (void *)match)) { - r = -EIO; + } + } else { + /* Non-sharing INTx mode */ + r = assigned_device_update_intx(kvm, match, assigned_irq); + if (r) { + printk(KERN_WARNING "kvm: failed to enable " + "INTx device!\n"); goto out_release; } } - match->irq_requested = true; mutex_unlock(&kvm->lock); return r; out_release: @@ -283,17 +490,26 @@ static int kvm_vm_ioctl_assign_device(struct kvm *kvm, __func__); goto out_disable; } + + pci_reset_function(dev); + match->assigned_dev_id = assigned_dev->assigned_dev_id; match->host_busnr = assigned_dev->busnr; match->host_devfn = assigned_dev->devfn; + match->flags = assigned_dev->flags; match->dev = dev; - + match->irq_source_id = -1; match->kvm = kvm; list_add(&match->list, &kvm->arch.assigned_dev_head); if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) { - r = kvm_iommu_map_guest(kvm, match); + if (!kvm->arch.iommu_domain) { + r = kvm_iommu_map_guest(kvm); + if (r) + goto out_list_del; + } + r = kvm_assign_device(kvm, match); if (r) goto out_list_del; } @@ -315,6 +531,35 @@ out_free: } #endif +#ifdef KVM_CAP_DEVICE_DEASSIGNMENT +static int kvm_vm_ioctl_deassign_device(struct kvm *kvm, + struct kvm_assigned_pci_dev *assigned_dev) +{ + int r = 0; + struct kvm_assigned_dev_kernel *match; + + mutex_lock(&kvm->lock); + + match = kvm_find_assigned_dev(&kvm->arch.assigned_dev_head, + assigned_dev->assigned_dev_id); + if (!match) { + printk(KERN_INFO "%s: device hasn't been assigned before, " + "so cannot be deassigned\n", __func__); + r = -EINVAL; + goto out; + } + + if (assigned_dev->flags & KVM_DEV_ASSIGN_ENABLE_IOMMU) + kvm_deassign_device(kvm, match); + + kvm_free_assigned_device(kvm, match); + +out: + mutex_unlock(&kvm->lock); + return r; +} +#endif + static inline int valid_vcpu(int n) { return likely(n >= 0 && n < KVM_MAX_VCPUS); @@ -355,57 +600,48 @@ static void ack_flush(void *_completed) { } -void kvm_flush_remote_tlbs(struct kvm *kvm) +static bool make_all_cpus_request(struct kvm *kvm, unsigned int req) { int i, cpu, me; - cpumask_t cpus; + cpumask_var_t cpus; + bool called = true; struct kvm_vcpu *vcpu; + if (alloc_cpumask_var(&cpus, GFP_ATOMIC)) + cpumask_clear(cpus); + me = get_cpu(); - cpus_clear(cpus); for (i = 0; i < KVM_MAX_VCPUS; ++i) { vcpu = kvm->vcpus[i]; if (!vcpu) continue; - if (test_and_set_bit(KVM_REQ_TLB_FLUSH, &vcpu->requests)) + if (test_and_set_bit(req, &vcpu->requests)) continue; cpu = vcpu->cpu; - if (cpu != -1 && cpu != me) - cpu_set(cpu, cpus); + if (cpus != NULL && cpu != -1 && cpu != me) + cpumask_set_cpu(cpu, cpus); } - if (cpus_empty(cpus)) - goto out; - ++kvm->stat.remote_tlb_flush; - smp_call_function_mask(cpus, ack_flush, NULL, 1); -out: + if (unlikely(cpus == NULL)) + smp_call_function_many(cpu_online_mask, ack_flush, NULL, 1); + else if (!cpumask_empty(cpus)) + smp_call_function_many(cpus, ack_flush, NULL, 1); + else + called = false; put_cpu(); + free_cpumask_var(cpus); + return called; } -void kvm_reload_remote_mmus(struct kvm *kvm) +void kvm_flush_remote_tlbs(struct kvm *kvm) { - int i, cpu, me; - cpumask_t cpus; - struct kvm_vcpu *vcpu; - - me = get_cpu(); - cpus_clear(cpus); - for (i = 0; i < KVM_MAX_VCPUS; ++i) { - vcpu = kvm->vcpus[i]; - if (!vcpu) - continue; - if (test_and_set_bit(KVM_REQ_MMU_RELOAD, &vcpu->requests)) - continue; - cpu = vcpu->cpu; - if (cpu != -1 && cpu != me) - cpu_set(cpu, cpus); - } - if (cpus_empty(cpus)) - goto out; - smp_call_function_mask(cpus, ack_flush, NULL, 1); -out: - put_cpu(); + if (make_all_cpus_request(kvm, KVM_REQ_TLB_FLUSH)) + ++kvm->stat.remote_tlb_flush; } +void kvm_reload_remote_mmus(struct kvm *kvm) +{ + make_all_cpus_request(kvm, KVM_REQ_MMU_RELOAD); +} int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id) { @@ -710,6 +946,8 @@ int __kvm_set_memory_region(struct kvm *kvm, goto out; if (mem->guest_phys_addr & (PAGE_SIZE - 1)) goto out; + if (user_alloc && (mem->userspace_addr & (PAGE_SIZE - 1))) + goto out; if (mem->slot >= KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS) goto out; if (mem->guest_phys_addr + mem->memory_size < mem->guest_phys_addr) @@ -821,7 +1059,10 @@ int __kvm_set_memory_region(struct kvm *kvm, goto out_free; } - kvm_free_physmem_slot(&old, &new); + kvm_free_physmem_slot(&old, npages ? &new : NULL); + /* Slot deletion case: we have to update the current slot */ + if (!npages) + *memslot = old; #ifdef CONFIG_DMAR /* map the pages in iommu page table */ r = kvm_iommu_map_pages(kvm, base_gfn, npages); @@ -918,7 +1159,7 @@ int kvm_is_error_hva(unsigned long addr) } EXPORT_SYMBOL_GPL(kvm_is_error_hva); -static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) +struct kvm_memory_slot *gfn_to_memslot_unaliased(struct kvm *kvm, gfn_t gfn) { int i; @@ -931,11 +1172,12 @@ static struct kvm_memory_slot *__gfn_to_memslot(struct kvm *kvm, gfn_t gfn) } return NULL; } +EXPORT_SYMBOL_GPL(gfn_to_memslot_unaliased); struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn) { gfn = unalias_gfn(kvm, gfn); - return __gfn_to_memslot(kvm, gfn); + return gfn_to_memslot_unaliased(kvm, gfn); } int kvm_is_visible_gfn(struct kvm *kvm, gfn_t gfn) @@ -959,7 +1201,7 @@ unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) struct kvm_memory_slot *slot; gfn = unalias_gfn(kvm, gfn); - slot = __gfn_to_memslot(kvm, gfn); + slot = gfn_to_memslot_unaliased(kvm, gfn); if (!slot) return bad_hva(); return (slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE); @@ -1210,7 +1452,7 @@ void mark_page_dirty(struct kvm *kvm, gfn_t gfn) struct kvm_memory_slot *memslot; gfn = unalias_gfn(kvm, gfn); - memslot = __gfn_to_memslot(kvm, gfn); + memslot = gfn_to_memslot_unaliased(kvm, gfn); if (memslot && memslot->dirty_bitmap) { unsigned long rel_gfn = gfn - memslot->base_gfn; @@ -1295,7 +1537,7 @@ static int kvm_vcpu_release(struct inode *inode, struct file *filp) return 0; } -static const struct file_operations kvm_vcpu_fops = { +static struct file_operations kvm_vcpu_fops = { .release = kvm_vcpu_release, .unlocked_ioctl = kvm_vcpu_ioctl, .compat_ioctl = kvm_vcpu_ioctl, @@ -1651,6 +1893,19 @@ static long kvm_vm_ioctl(struct file *filp, break; } #endif +#ifdef KVM_CAP_DEVICE_DEASSIGNMENT + case KVM_DEASSIGN_PCI_DEVICE: { + struct kvm_assigned_pci_dev assigned_dev; + + r = -EFAULT; + if (copy_from_user(&assigned_dev, argp, sizeof assigned_dev)) + goto out; + r = kvm_vm_ioctl_deassign_device(kvm, &assigned_dev); + if (r) + goto out; + break; + } +#endif default: r = kvm_arch_vm_ioctl(filp, ioctl, arg); } @@ -1689,7 +1944,7 @@ static int kvm_vm_mmap(struct file *file, struct vm_area_struct *vma) return 0; } -static const struct file_operations kvm_vm_fops = { +static struct file_operations kvm_vm_fops = { .release = kvm_vm_release, .unlocked_ioctl = kvm_vm_ioctl, .compat_ioctl = kvm_vm_ioctl, @@ -1711,6 +1966,18 @@ static int kvm_dev_ioctl_create_vm(void) return fd; } +static long kvm_dev_ioctl_check_extension_generic(long arg) +{ + switch (arg) { + case KVM_CAP_USER_MEMORY: + case KVM_CAP_DESTROY_MEMORY_REGION_WORKS: + return 1; + default: + break; + } + return kvm_dev_ioctl_check_extension(arg); +} + static long kvm_dev_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg) { @@ -1730,7 +1997,7 @@ static long kvm_dev_ioctl(struct file *filp, r = kvm_dev_ioctl_create_vm(); break; case KVM_CHECK_EXTENSION: - r = kvm_dev_ioctl_check_extension(arg); + r = kvm_dev_ioctl_check_extension_generic(arg); break; case KVM_GET_VCPU_MMAP_SIZE: r = -EINVAL; @@ -1771,9 +2038,9 @@ static void hardware_enable(void *junk) { int cpu = raw_smp_processor_id(); - if (cpu_isset(cpu, cpus_hardware_enabled)) + if (cpumask_test_cpu(cpu, cpus_hardware_enabled)) return; - cpu_set(cpu, cpus_hardware_enabled); + cpumask_set_cpu(cpu, cpus_hardware_enabled); kvm_arch_hardware_enable(NULL); } @@ -1781,9 +2048,9 @@ static void hardware_disable(void *junk) { int cpu = raw_smp_processor_id(); - if (!cpu_isset(cpu, cpus_hardware_enabled)) + if (!cpumask_test_cpu(cpu, cpus_hardware_enabled)) return; - cpu_clear(cpu, cpus_hardware_enabled); + cpumask_clear_cpu(cpu, cpus_hardware_enabled); kvm_arch_hardware_disable(NULL); } @@ -2017,9 +2284,14 @@ int kvm_init(void *opaque, unsigned int vcpu_size, bad_pfn = page_to_pfn(bad_page); + if (!alloc_cpumask_var(&cpus_hardware_enabled, GFP_KERNEL)) { + r = -ENOMEM; + goto out_free_0; + } + r = kvm_arch_hardware_setup(); if (r < 0) - goto out_free_0; + goto out_free_0a; for_each_online_cpu(cpu) { smp_call_function_single(cpu, @@ -2053,6 +2325,8 @@ int kvm_init(void *opaque, unsigned int vcpu_size, } kvm_chardev_ops.owner = module; + kvm_vm_fops.owner = module; + kvm_vcpu_fops.owner = module; r = misc_register(&kvm_dev); if (r) { @@ -2062,6 +2336,9 @@ int kvm_init(void *opaque, unsigned int vcpu_size, kvm_preempt_ops.sched_in = kvm_sched_in; kvm_preempt_ops.sched_out = kvm_sched_out; +#ifndef CONFIG_X86 + msi2intx = 0; +#endif return 0; @@ -2078,6 +2355,8 @@ out_free_2: on_each_cpu(hardware_disable, NULL, 1); out_free_1: kvm_arch_hardware_unsetup(); +out_free_0a: + free_cpumask_var(cpus_hardware_enabled); out_free_0: __free_page(bad_page); out: @@ -2101,6 +2380,7 @@ void kvm_exit(void) kvm_arch_hardware_unsetup(); kvm_arch_exit(); kvm_exit_debug(); + free_cpumask_var(cpus_hardware_enabled); __free_page(bad_page); } EXPORT_SYMBOL_GPL(kvm_exit); diff --git a/virt/kvm/kvm_trace.c b/virt/kvm/kvm_trace.c index 41dcc845f78..f5987444644 100644 --- a/virt/kvm/kvm_trace.c +++ b/virt/kvm/kvm_trace.c @@ -252,6 +252,7 @@ void kvm_trace_cleanup(void) struct kvm_trace_probe *p = &kvm_trace_probes[i]; marker_probe_unregister(p->name, p->probe_func, p); } + marker_synchronize_unregister(); relay_close(kt->rchan); debugfs_remove(kt->lost_file); |