On 2018-09-11 10:20 a.m., Christian König wrote: > Am 11.09.2018 um 09:55 schrieb Michel Dänzer: >> On 2018-09-11 9:46 a.m., Christian König wrote: >>> Am 11.09.2018 um 09:37 schrieb Michel Dänzer: >>>> On 2018-09-11 8:49 a.m., Christian König wrote: >>>>> But another question: Why do you want to clear VRAM on allocation? We >>>>> perfectly support allocating VRAM without clearing it. >>>> Which is a problem of its own, as it can leak information from one >>>> process to another. >>> How about adding a AMDGPU_GEM_CREATE_VRAM_SECRED flag which triggers >>> clearing VRAM when the BO is freed? >> Doesn't sound like much better API than AMDGPU_GEM_CREATE_VRAM_CLEARED >> to me. Why would any process be okay with leaking its BO contents to >> other processes? > > Well the content of most BOs is uninteresting to other processes, e.g. > textures. Textures can hold application window contents, which can be sensitive. Not clearing BOs can result in such contents showing up in unexpected places. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer
