> On Wed, Sep 30, 2020 at 6:09 PM Christoph Hellwig <hch@xxxxxx> wrote: > > > > Add a new API that returns a virtually non-contigous array of pages > > and dma address. This API is only implemented for dma-iommu and will > > not be implemented for non-iommu DMA API instances that have to allocate > > contiguous memory. It is up to the caller to check if the API is > > available. Isn't there already a flag that is only implemented for ARM systems with iommu that forces pages to actually be physically contiguous? So isn't this some kind of strange opposite? David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
