On Tue, Nov 27, 2018 at 05:58:18PM +0000, Jean-Philippe Brucker wrote: > On 23/11/2018 21:48, Michael S. Tsirkin wrote: > >> +struct virtio_iommu_config { > >> + /* Supported page sizes */ > >> + __u64 page_size_mask; > >> + /* Supported IOVA range */ > >> + struct virtio_iommu_range input_range; > >> + /* Max domain ID size */ > >> + __u8 domain_bits; > >> + __u8 padding[3]; > > > > Not enough padding here it seems. Structure is 8 byte > > aligned on 64 bit systems. > > The next field (probe_size) is 4 bytes, so the alignment ends up fine. > That field is introduced in patch 6, maybe I should move it here? > > Thanks, > Jean Sounds like a good idea. -- MST