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VFIO fixes for v6.2-rc6

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- Honor reserved regions when testing for IOMMU find grained super
    page support, avoiding a regression on s390 for a firmware device
    where the existence of the mapping, even if unused can trigger
    an error state. (Niklas Schnelle)
 
  - Fix a deadlock in releasing KVM references by using the alternate
    .release() rather than .destroy() callback for the kvm-vfio device.
    (Yi Liu)
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Merge tag 'vfio-v6.2-rc6' of https://github.com/awilliam/linux-vfio

Pull VFIO fixes from Alex Williamson:

 - Honor reserved regions when testing for IOMMU find grained super page
   support, avoiding a regression on s390 for a firmware device where
   the existence of the mapping, even if unused can trigger an error
   state. (Niklas Schnelle)

 - Fix a deadlock in releasing KVM references by using the alternate
   .release() rather than .destroy() callback for the kvm-vfio device.
   (Yi Liu)

* tag 'vfio-v6.2-rc6' of https://github.com/awilliam/linux-vfio:
  kvm/vfio: Fix potential deadlock on vfio group_lock
  vfio/type1: Respect IOMMU reserved regions in vfio_test_domain_fgsp()
This commit is contained in:
Linus Torvalds 2023-01-23 11:56:07 -08:00
commit 7bf70dbb18
2 changed files with 23 additions and 14 deletions
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6
virt/kvm/vfio.c
View file

@ -336,7 +336,7 @@ static int kvm_vfio_has_attr(struct kvm_device *dev,
return -ENXIO;
}
static void kvm_vfio_destroy(struct kvm_device *dev)
static void kvm_vfio_release(struct kvm_device *dev)
{
struct kvm_vfio *kv = dev->private;
struct kvm_vfio_group *kvg, *tmp;
@ -355,7 +355,7 @@ static void kvm_vfio_destroy(struct kvm_device *dev)
kvm_vfio_update_coherency(dev);
kfree(kv);
kfree(dev); /* alloc by kvm_ioctl_create_device, free by .destroy */
kfree(dev); /* alloc by kvm_ioctl_create_device, free by .release */
}
static int kvm_vfio_create(struct kvm_device *dev, u32 type);
@ -363,7 +363,7 @@ static int kvm_vfio_create(struct kvm_device *dev, u32 type);
static struct kvm_device_ops kvm_vfio_ops = {
.name = "kvm-vfio",
.create = kvm_vfio_create,
.destroy = kvm_vfio_destroy,
.release = kvm_vfio_release,
.set_attr = kvm_vfio_set_attr,
.has_attr = kvm_vfio_has_attr,
};