• Ben Skeggs's avatar
    drm/nouveau: prepare for enabling svm with existing userspace interfaces · bfe91afa
    Ben Skeggs authored
    For a channel to make use of SVM features, it requires a different GPU MMU
    configuration than we would normally use, which is not desirable to switch
    to unless a client is actively going to use SVM.
    
    In order to supporting SVM without more extensive changes to the userspace
    interfaces, the SVM_INIT ioctl needs to replace the previous configuration
    safely.
    
    The only way we can currently do this safely, accounting for some unlikely
    failure conditions, is to allocate the new VMM without destroying the last
    one, and prioritising the SVM-enabled configuration in the code that cares.
    
    This will get cleaned up again further down the track.
    Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>
    bfe91afa
nouveau_bo.c 42.6 KB