Re: [PATCH] KVM: selftest: Add family and model check for zen4 in PMU filter test

On Wed, May 01, 2024, Manali Shukla wrote:

PMU event filter test fails on zen4 architecture because of unavailability of family and model check for zen4 in use_amd_pmu(). So, add family and model check for zen4 architecture in use_amd_pmu().

Is there a less ugly way to detect that 0xc2,0 == "branch instructions retired"? E.g. can we instead check for v2 PMU support, or are there no guarantees going forward? Pivoting on FMS is so painful :-(