On Wed, 2025-10-29 at 22:30 -0700, John Hubbard wrote: > However, I don't want anyone to have to risk reading boot42 on some > ancient GPU (earlier than Fermi, even), with uncertain results. > > And our HW team has promised to leave behind arch0==0, arch1==1 in > in boot0, more or less forever, specifically to help us out here. > > With that in mind, I *do* want to read boot0 for the forseeable future, > as a guide to whether to look at boot42. I really think that is the > way to thread the needle here.
Sure, and this is exactly what is_ancient_gpu() does. It tells you whether to use boot42 instead of boot0. It is the only function that looks at boot0.
