On Sun, Mar 28, 2021 at 01:53:15AM +0100, Thomas Gleixner wrote: > Though the little devil in my head tells me, that making AMX support > depend on the CPUID faulting capability might be not the worst thing. > > Then we actually enforce CPUID faulting (finally) on CPUs which support > it, which would be a first step into the right direction simply because > then random library X has to go to the kernel and ask for it explicitely > or just shrug and use whatever the kernel is willing to hand out in > CPUID. > > Now take that one step further. When the first part of some user space > application asks for it, then you can register that with the process and > make sane decisions for all other requesters which come after it, which > is an important step into the direction of having a common orchestration > for this. I wrote something like that at least one... https://lore.kernel.org/lkml/20190212164833.GK32494@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx/ we just need to make sure AMD implements that before it ships a chip with AVX512 on.
