vfio: Create KVM-VFIO device
Create KVM-VFIO device and add VFIO devices to it, this can be used
to create pviommu for guests.
Signed-off-by: Mostafa Saleh <smostafa@google.com>
diff --git a/vfio/core.c b/vfio/core.c
index 074588f..c30044c 100644
--- a/vfio/core.c
+++ b/vfio/core.c
@@ -672,6 +672,37 @@
NULL);
}
+static int vfio_configure_kvm_device(struct kvm *kvm)
+{
+ pr_err("Create KVM-VFIO device\n");
+ struct vfio_group *group;
+ struct kvm_create_device cd = {
+ .type = KVM_DEV_TYPE_VFIO,
+ };
+
+ int ret;
+ ret = ioctl(kvm->vm_fd, KVM_CREATE_DEVICE, &cd);
+ if (ret) {
+ pr_err("Failed to create kvm-vfio bridge %d\n", ret);
+ return ret;
+ }
+
+ list_for_each_entry(group, &vfio_groups, list) {
+ struct kvm_device_attr attr = {
+ .group = KVM_DEV_VFIO_GROUP,
+ .attr = KVM_DEV_VFIO_GROUP_ADD,
+ .addr = (uint64_t)(unsigned long)&group->fd,
+ };
+ ret = ioctl(cd.fd, KVM_SET_DEVICE_ATTR, &attr);
+ if (ret) {
+ pr_err("Failed to create add group to kvm-vfio device %d\n", ret);
+ return ret;
+ }
+ }
+
+ return 0;
+}
+
static int vfio__init(struct kvm *kvm)
{
int ret;
@@ -695,6 +726,10 @@
if (ret)
return ret;
+ ret = vfio_configure_kvm_device(kvm);
+ if (ret)
+ return ret;
+
return 0;
}
dev_base_init(vfio__init);
