On 17/07/2025 9:26 am, Jan Beulich wrote: > On 16.07.2025 19:31, Andrew Cooper wrote: >> With the ability to match on steppings, introduce a new X86_MATCH_VFMS() >> helper to match a specific stepping, and use it to rework deadline_match[]. > I'm fine with the patch in principle, but I wonder how you envision to support > a match for multiple steppings in one go then. In particular > macro-naming-wise.
The Linux version uses X86_MATCH_VFM_STEPS(vfm, min_step, max_step, data) and calls GENMASK(min_step, max_step) but for a single stepping that causes rows which look like: X86_MATCH_VFM_STEPS(INTEL_HASWELL_X, 0x2, 0x2, 0x3a), /* EP */ Even in Linux, there are very few examples which take a genuine range, and nothing so far that we need in Xen, so I implemented a slightly different helper. ~Andrew
