diff options
| author | Jike Song <jike.song@intel.com> | 2016-12-01 06:20:07 +0100 |
|---|---|---|
| committer | Alex Williamson <alex.williamson@redhat.com> | 2016-12-01 18:42:17 +0100 |
| commit | 2fc1bec15883537cf8b35fd628cca33ca25736a5 (patch) | |
| tree | 21d4b73901fe4662c38ce85b0f5285a2e09bdad7 | |
| parent | vfio: support notifier chain in vfio_group (diff) | |
| download | linux-2fc1bec15883537cf8b35fd628cca33ca25736a5.tar.xz linux-2fc1bec15883537cf8b35fd628cca33ca25736a5.zip | |
kvm: set/clear kvm to/from vfio_group when group add/delete
Sometimes users need to be aware when a vfio_group attaches to a
KVM or detaches from it. KVM already calls get/put method from vfio to
manipulate the vfio_group reference, it can notify vfio_group in
a similar way.
Cc: Kirti Wankhede <kwankhede@nvidia.com>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Jike Song <jike.song@intel.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
| -rw-r--r-- | virt/kvm/vfio.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/virt/kvm/vfio.c b/virt/kvm/vfio.c index 1dd087da6f31..d32f239eb471 100644 --- a/virt/kvm/vfio.c +++ b/virt/kvm/vfio.c @@ -60,6 +60,19 @@ static void kvm_vfio_group_put_external_user(struct vfio_group *vfio_group) symbol_put(vfio_group_put_external_user); } +static void kvm_vfio_group_set_kvm(struct vfio_group *group, struct kvm *kvm) +{ + void (*fn)(struct vfio_group *, struct kvm *); + + fn = symbol_get(vfio_group_set_kvm); + if (!fn) + return; + + fn(group, kvm); + + symbol_put(vfio_group_set_kvm); +} + static bool kvm_vfio_group_is_coherent(struct vfio_group *vfio_group) { long (*fn)(struct vfio_group *, unsigned long); @@ -159,6 +172,8 @@ static int kvm_vfio_set_group(struct kvm_device *dev, long attr, u64 arg) mutex_unlock(&kv->lock); + kvm_vfio_group_set_kvm(vfio_group, dev->kvm); + kvm_vfio_update_coherency(dev); return 0; @@ -196,6 +211,8 @@ static int kvm_vfio_set_group(struct kvm_device *dev, long attr, u64 arg) mutex_unlock(&kv->lock); + kvm_vfio_group_set_kvm(vfio_group, NULL); + kvm_vfio_group_put_external_user(vfio_group); kvm_vfio_update_coherency(dev); @@ -240,6 +257,7 @@ static void kvm_vfio_destroy(struct kvm_device *dev) struct kvm_vfio_group *kvg, *tmp; list_for_each_entry_safe(kvg, tmp, &kv->group_list, node) { + kvm_vfio_group_set_kvm(kvg->vfio_group, NULL); kvm_vfio_group_put_external_user(kvg->vfio_group); list_del(&kvg->node); kfree(kvg); |