On Thu, May 26, 2005 at 09:31:19AM -0700, Matt Porter wrote: > Why don't we try a different approach to the problem? The problem is > that io_block_mapping() is causing a ton of problems with people > abusing it. Just check the archives for all the ways people break > their ports by passing it arbitrary values. The other issue is > that although it's dangerous, the call still serves a purposes on > those processors with BATs and CAMs. So, let's kill io_block_mapping(). > i.e. the version that allows virt->phys translations to be set up > without use of BATs and CAMs. Let's add a new mmu_block_mapping() > call that will ONLY map using a BAT or CAM and is only available > on platforms with those facilities. If a free BAT or CAM is not available > or alignment/size is invalid, the call fails. I would hope that would > make everybody happy. > > We still end up with a call that will help people shoot themselves > in the foot, but at least we limit it to a specific task.
I second that. -- Eugene
