On 08/09/2021 13:08, Jan Beulich wrote: > On 08.09.2021 10:19, Jane Malalane wrote: >> Zen2 CPUs actually have this behaviour, but the CPUID bit couldn't be >> introduced into Zen2 due to a lack of leaves. So, it was added in a >> new leaf in Zen3. Nonetheless, hypervisors can synthesize the CPUID >> bit in software. > Considering the prior model checks, I understand this isn't all Zen2s? > No matter what the answer, I'd like to ask that the first sentence > start with either "All" or "Some" (or something along these lines). > Which is of course fine to insert while committing, so not need to > send a v3.
All Zen2's have this behaviour. The model checks were trying to avoid running the probe on Zen1, but "model >= 0x30 && mode != 0x50" is error prone. There are no faults in the probe, and its fast, so running on all Zen1/2 is better than hoping that we got the model list correct. ~Andrew
