KVM: PPC: Move xics_debugfs_init out of create

As we are about to hold the kvm->lock during the create operation on KVM
devices, we should move the call to xics_debugfs_init into its own
function, since holding a mutex over extended amounts of time might not
be a good idea.

Introduce an init operation on the kvm_device_ops struct which cannot
fail and call this, if configured, after the device has been created.

Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 01e908ac4a39..d3c9b82812c3 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -1116,6 +1116,12 @@ struct kvm_device_ops {
         int (*create)(struct kvm_device *dev, u32 type);
 
         /*
+         * init is called after create if create is successful and is called
+         * outside of holding kvm->lock.
+         */
+        void (*init)(struct kvm_device *dev);
+
+        /*
          * Destroy is responsible for freeing dev.
          *
          * Destroy may be called before or after destructors are called