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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-05 14:47:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-05 14:47:31 -0700
commit01227a889ed56ae53aeebb9f93be9d54dd8b2de8 (patch)
treed5eba9359a9827e84d4112b84d48c54df5c5acde /virt/kvm/kvm_main.c
parent9e6879460c8edb0cd3c24c09b83d06541b5af0dc (diff)
parentdb6ae6158186a17165ef990bda2895ae7594b039 (diff)
downloadlinux-linaro-stable-01227a889ed56ae53aeebb9f93be9d54dd8b2de8.tar.gz
Merge tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm updates from Gleb Natapov: "Highlights of the updates are: general: - new emulated device API - legacy device assignment is now optional - irqfd interface is more generic and can be shared between arches x86: - VMCS shadow support and other nested VMX improvements - APIC virtualization and Posted Interrupt hardware support - Optimize mmio spte zapping ppc: - BookE: in-kernel MPIC emulation with irqfd support - Book3S: in-kernel XICS emulation (incomplete) - Book3S: HV: migration fixes - BookE: more debug support preparation - BookE: e6500 support ARM: - reworking of Hyp idmaps s390: - ioeventfd for virtio-ccw And many other bug fixes, cleanups and improvements" * tag 'kvm-3.10-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (204 commits) kvm: Add compat_ioctl for device control API KVM: x86: Account for failing enable_irq_window for NMI window request KVM: PPC: Book3S: Add API for in-kernel XICS emulation kvm/ppc/mpic: fix missing unlock in set_base_addr() kvm/ppc: Hold srcu lock when calling kvm_io_bus_read/write kvm/ppc/mpic: remove users kvm/ppc/mpic: fix mmio region lists when multiple guests used kvm/ppc/mpic: remove default routes from documentation kvm: KVM_CAP_IOMMU only available with device assignment ARM: KVM: iterate over all CPUs for CPU compatibility check KVM: ARM: Fix spelling in error message ARM: KVM: define KVM_ARM_MAX_VCPUS unconditionally KVM: ARM: Fix API documentation for ONE_REG encoding ARM: KVM: promote vfp_host pointer to generic host cpu context ARM: KVM: add architecture specific hook for capabilities ARM: KVM: perform HYP initilization for hotplugged CPUs ARM: KVM: switch to a dual-step HYP init code ARM: KVM: rework HYP page table freeing ARM: KVM: enforce maximum size for identity mapped code ARM: KVM: move to a KVM provided HYP idmap ...
Diffstat (limited to 'virt/kvm/kvm_main.c')
-rw-r--r--virt/kvm/kvm_main.c258
1 files changed, 211 insertions, 47 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index f18013f09e68..45f09362ee7b 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -217,9 +217,9 @@ void kvm_make_mclock_inprogress_request(struct kvm *kvm)
make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS);
}
-void kvm_make_update_eoibitmap_request(struct kvm *kvm)
+void kvm_make_scan_ioapic_request(struct kvm *kvm)
{
- make_all_cpus_request(kvm, KVM_REQ_EOIBITMAP);
+ make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC);
}
int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
@@ -244,6 +244,7 @@ int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
kvm_vcpu_set_in_spin_loop(vcpu, false);
kvm_vcpu_set_dy_eligible(vcpu, false);
+ vcpu->preempted = false;
r = kvm_arch_vcpu_init(vcpu);
if (r < 0)
@@ -503,6 +504,7 @@ static struct kvm *kvm_create_vm(unsigned long type)
mutex_init(&kvm->irq_lock);
mutex_init(&kvm->slots_lock);
atomic_set(&kvm->users_count, 1);
+ INIT_LIST_HEAD(&kvm->devices);
r = kvm_init_mmu_notifier(kvm);
if (r)
@@ -580,6 +582,19 @@ void kvm_free_physmem(struct kvm *kvm)
kfree(kvm->memslots);
}
+static void kvm_destroy_devices(struct kvm *kvm)
+{
+ struct list_head *node, *tmp;
+
+ list_for_each_safe(node, tmp, &kvm->devices) {
+ struct kvm_device *dev =
+ list_entry(node, struct kvm_device, vm_node);
+
+ list_del(node);
+ dev->ops->destroy(dev);
+ }
+}
+
static void kvm_destroy_vm(struct kvm *kvm)
{
int i;
@@ -599,6 +614,7 @@ static void kvm_destroy_vm(struct kvm *kvm)
kvm_arch_flush_shadow_all(kvm);
#endif
kvm_arch_destroy_vm(kvm);
+ kvm_destroy_devices(kvm);
kvm_free_physmem(kvm);
cleanup_srcu_struct(&kvm->srcu);
kvm_arch_free_vm(kvm);
@@ -719,24 +735,6 @@ static struct kvm_memslots *install_new_memslots(struct kvm *kvm,
}
/*
- * KVM_SET_USER_MEMORY_REGION ioctl allows the following operations:
- * - create a new memory slot
- * - delete an existing memory slot
- * - modify an existing memory slot
- * -- move it in the guest physical memory space
- * -- just change its flags
- *
- * Since flags can be changed by some of these operations, the following
- * differentiation is the best we can do for __kvm_set_memory_region():
- */
-enum kvm_mr_change {
- KVM_MR_CREATE,
- KVM_MR_DELETE,
- KVM_MR_MOVE,
- KVM_MR_FLAGS_ONLY,
-};
-
-/*
* Allocate some memory and give it an address in the guest physical address
* space.
*
@@ -745,8 +743,7 @@ enum kvm_mr_change {
* Must be called holding mmap_sem for write.
*/
int __kvm_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
- bool user_alloc)
+ struct kvm_userspace_memory_region *mem)
{
int r;
gfn_t base_gfn;
@@ -767,7 +764,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
if (mem->guest_phys_addr & (PAGE_SIZE - 1))
goto out;
/* We can read the guest memory with __xxx_user() later on. */
- if (user_alloc &&
+ if ((mem->slot < KVM_USER_MEM_SLOTS) &&
((mem->userspace_addr & (PAGE_SIZE - 1)) ||
!access_ok(VERIFY_WRITE,
(void __user *)(unsigned long)mem->userspace_addr,
@@ -875,7 +872,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
slots = old_memslots;
}
- r = kvm_arch_prepare_memory_region(kvm, &new, old, mem, user_alloc);
+ r = kvm_arch_prepare_memory_region(kvm, &new, mem, change);
if (r)
goto out_slots;
@@ -915,7 +912,7 @@ int __kvm_set_memory_region(struct kvm *kvm,
old_memslots = install_new_memslots(kvm, slots, &new);
- kvm_arch_commit_memory_region(kvm, mem, old, user_alloc);
+ kvm_arch_commit_memory_region(kvm, mem, &old, change);
kvm_free_physmem_slot(&old, &new);
kfree(old_memslots);
@@ -932,26 +929,23 @@ out:
EXPORT_SYMBOL_GPL(__kvm_set_memory_region);
int kvm_set_memory_region(struct kvm *kvm,
- struct kvm_userspace_memory_region *mem,
- bool user_alloc)
+ struct kvm_userspace_memory_region *mem)
{
int r;
mutex_lock(&kvm->slots_lock);
- r = __kvm_set_memory_region(kvm, mem, user_alloc);
+ r = __kvm_set_memory_region(kvm, mem);
mutex_unlock(&kvm->slots_lock);
return r;
}
EXPORT_SYMBOL_GPL(kvm_set_memory_region);
int kvm_vm_ioctl_set_memory_region(struct kvm *kvm,
- struct
- kvm_userspace_memory_region *mem,
- bool user_alloc)
+ struct kvm_userspace_memory_region *mem)
{
if (mem->slot >= KVM_USER_MEM_SLOTS)
return -EINVAL;
- return kvm_set_memory_region(kvm, mem, user_alloc);
+ return kvm_set_memory_region(kvm, mem);
}
int kvm_get_dirty_log(struct kvm *kvm,
@@ -1099,7 +1093,7 @@ static int kvm_read_hva_atomic(void *data, void __user *hva, int len)
return __copy_from_user_inatomic(data, hva, len);
}
-int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm,
+static int get_user_page_nowait(struct task_struct *tsk, struct mm_struct *mm,
unsigned long start, int write, struct page **page)
{
int flags = FOLL_TOUCH | FOLL_NOWAIT | FOLL_HWPOISON | FOLL_GET;
@@ -1719,6 +1713,7 @@ void kvm_vcpu_kick(struct kvm_vcpu *vcpu)
smp_send_reschedule(cpu);
put_cpu();
}
+EXPORT_SYMBOL_GPL(kvm_vcpu_kick);
#endif /* !CONFIG_S390 */
void kvm_resched(struct kvm_vcpu *vcpu)
@@ -1816,6 +1811,8 @@ void kvm_vcpu_on_spin(struct kvm_vcpu *me)
continue;
} else if (pass && i > last_boosted_vcpu)
break;
+ if (!ACCESS_ONCE(vcpu->preempted))
+ continue;
if (vcpu == me)
continue;
if (waitqueue_active(&vcpu->wq))
@@ -2204,6 +2201,119 @@ out:
}
#endif
+static int kvm_device_ioctl_attr(struct kvm_device *dev,
+ int (*accessor)(struct kvm_device *dev,
+ struct kvm_device_attr *attr),
+ unsigned long arg)
+{
+ struct kvm_device_attr attr;
+
+ if (!accessor)
+ return -EPERM;
+
+ if (copy_from_user(&attr, (void __user *)arg, sizeof(attr)))
+ return -EFAULT;
+
+ return accessor(dev, &attr);
+}
+
+static long kvm_device_ioctl(struct file *filp, unsigned int ioctl,
+ unsigned long arg)
+{
+ struct kvm_device *dev = filp->private_data;
+
+ switch (ioctl) {
+ case KVM_SET_DEVICE_ATTR:
+ return kvm_device_ioctl_attr(dev, dev->ops->set_attr, arg);
+ case KVM_GET_DEVICE_ATTR:
+ return kvm_device_ioctl_attr(dev, dev->ops->get_attr, arg);
+ case KVM_HAS_DEVICE_ATTR:
+ return kvm_device_ioctl_attr(dev, dev->ops->has_attr, arg);
+ default:
+ if (dev->ops->ioctl)
+ return dev->ops->ioctl(dev, ioctl, arg);
+
+ return -ENOTTY;
+ }
+}
+
+static int kvm_device_release(struct inode *inode, struct file *filp)
+{
+ struct kvm_device *dev = filp->private_data;
+ struct kvm *kvm = dev->kvm;
+
+ kvm_put_kvm(kvm);
+ return 0;
+}
+
+static const struct file_operations kvm_device_fops = {
+ .unlocked_ioctl = kvm_device_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = kvm_device_ioctl,
+#endif
+ .release = kvm_device_release,
+};
+
+struct kvm_device *kvm_device_from_filp(struct file *filp)
+{
+ if (filp->f_op != &kvm_device_fops)
+ return NULL;
+
+ return filp->private_data;
+}
+
+static int kvm_ioctl_create_device(struct kvm *kvm,
+ struct kvm_create_device *cd)
+{
+ struct kvm_device_ops *ops = NULL;
+ struct kvm_device *dev;
+ bool test = cd->flags & KVM_CREATE_DEVICE_TEST;
+ int ret;
+
+ switch (cd->type) {
+#ifdef CONFIG_KVM_MPIC
+ case KVM_DEV_TYPE_FSL_MPIC_20:
+ case KVM_DEV_TYPE_FSL_MPIC_42:
+ ops = &kvm_mpic_ops;
+ break;
+#endif
+#ifdef CONFIG_KVM_XICS
+ case KVM_DEV_TYPE_XICS:
+ ops = &kvm_xics_ops;
+ break;
+#endif
+ default:
+ return -ENODEV;
+ }
+
+ if (test)
+ return 0;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return -ENOMEM;
+
+ dev->ops = ops;
+ dev->kvm = kvm;
+
+ ret = ops->create(dev, cd->type);
+ if (ret < 0) {
+ kfree(dev);
+ return ret;
+ }
+
+ ret = anon_inode_getfd(ops->name, &kvm_device_fops, dev, O_RDWR);
+ if (ret < 0) {
+ ops->destroy(dev);
+ return ret;
+ }
+
+ list_add(&dev->vm_node, &kvm->devices);
+ kvm_get_kvm(kvm);
+ cd->fd = ret;
+ return 0;
+}
+
static long kvm_vm_ioctl(struct file *filp,
unsigned int ioctl, unsigned long arg)
{
@@ -2225,7 +2335,7 @@ static long kvm_vm_ioctl(struct file *filp,
sizeof kvm_userspace_mem))
goto out;
- r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem, true);
+ r = kvm_vm_ioctl_set_memory_region(kvm, &kvm_userspace_mem);
break;
}
case KVM_GET_DIRTY_LOG: {
@@ -2304,7 +2414,8 @@ static long kvm_vm_ioctl(struct file *filp,
if (copy_from_user(&irq_event, argp, sizeof irq_event))
goto out;
- r = kvm_vm_ioctl_irq_line(kvm, &irq_event);
+ r = kvm_vm_ioctl_irq_line(kvm, &irq_event,
+ ioctl == KVM_IRQ_LINE_STATUS);
if (r)
goto out;
@@ -2318,6 +2429,54 @@ static long kvm_vm_ioctl(struct file *filp,
break;
}
#endif
+#ifdef CONFIG_HAVE_KVM_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 /* CONFIG_HAVE_KVM_IRQ_ROUTING */
+ case KVM_CREATE_DEVICE: {
+ struct kvm_create_device cd;
+
+ r = -EFAULT;
+ if (copy_from_user(&cd, argp, sizeof(cd)))
+ goto out;
+
+ r = kvm_ioctl_create_device(kvm, &cd);
+ if (r)
+ goto out;
+
+ r = -EFAULT;
+ if (copy_to_user(argp, &cd, sizeof(cd)))
+ goto out;
+
+ r = 0;
+ break;
+ }
default:
r = kvm_arch_vm_ioctl(filp, ioctl, arg);
if (r == -ENOTTY)
@@ -2447,8 +2606,11 @@ static long kvm_dev_ioctl_check_extension_generic(long arg)
#ifdef CONFIG_HAVE_KVM_MSI
case KVM_CAP_SIGNAL_MSI:
#endif
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
+ case KVM_CAP_IRQFD_RESAMPLE:
+#endif
return 1;
-#ifdef KVM_CAP_IRQ_ROUTING
+#ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
case KVM_CAP_IRQ_ROUTING:
return KVM_MAX_IRQ_ROUTES;
#endif
@@ -2618,14 +2780,6 @@ static int kvm_cpu_hotplug(struct notifier_block *notifier, unsigned long val,
return NOTIFY_OK;
}
-
-asmlinkage void kvm_spurious_fault(void)
-{
- /* Fault while not rebooting. We want the trace. */
- BUG();
-}
-EXPORT_SYMBOL_GPL(kvm_spurious_fault);
-
static int kvm_reboot(struct notifier_block *notifier, unsigned long val,
void *v)
{
@@ -2658,7 +2812,7 @@ static void kvm_io_bus_destroy(struct kvm_io_bus *bus)
kfree(bus);
}
-int kvm_io_bus_sort_cmp(const void *p1, const void *p2)
+static int kvm_io_bus_sort_cmp(const void *p1, const void *p2)
{
const struct kvm_io_range *r1 = p1;
const struct kvm_io_range *r2 = p2;
@@ -2670,7 +2824,7 @@ int kvm_io_bus_sort_cmp(const void *p1, const void *p2)
return 0;
}
-int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev,
+static int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev,
gpa_t addr, int len)
{
bus->range[bus->dev_count++] = (struct kvm_io_range) {
@@ -2685,7 +2839,7 @@ int kvm_io_bus_insert_dev(struct kvm_io_bus *bus, struct kvm_io_device *dev,
return 0;
}
-int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus,
+static int kvm_io_bus_get_first_dev(struct kvm_io_bus *bus,
gpa_t addr, int len)
{
struct kvm_io_range *range, key;
@@ -2929,6 +3083,8 @@ struct kvm_vcpu *preempt_notifier_to_vcpu(struct preempt_notifier *pn)
static void kvm_sched_in(struct preempt_notifier *pn, int cpu)
{
struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
+ if (vcpu->preempted)
+ vcpu->preempted = false;
kvm_arch_vcpu_load(vcpu, cpu);
}
@@ -2938,6 +3094,8 @@ static void kvm_sched_out(struct preempt_notifier *pn,
{
struct kvm_vcpu *vcpu = preempt_notifier_to_vcpu(pn);
+ if (current->state == TASK_RUNNING)
+ vcpu->preempted = true;
kvm_arch_vcpu_put(vcpu);
}
@@ -2947,6 +3105,9 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
int r;
int cpu;
+ r = kvm_irqfd_init();
+ if (r)
+ goto out_irqfd;
r = kvm_arch_init(opaque);
if (r)
goto out_fail;
@@ -3027,6 +3188,8 @@ out_free_0a:
out_free_0:
kvm_arch_exit();
out_fail:
+ kvm_irqfd_exit();
+out_irqfd:
return r;
}
EXPORT_SYMBOL_GPL(kvm_init);
@@ -3043,6 +3206,7 @@ void kvm_exit(void)
on_each_cpu(hardware_disable_nolock, NULL, 1);
kvm_arch_hardware_unsetup();
kvm_arch_exit();
+ kvm_irqfd_exit();
free_cpumask_var(cpus_hardware_enabled);
}
EXPORT_SYMBOL_GPL(kvm_exit);