On 7/4/2023 10:02 am, Sean Christopherson wrote:
On Tue, 14 Feb 2023 13:07:45 +0800, Like Xu wrote:
Starting with Zen4, core PMU on AMD platforms such as Genoa and
Ryzen-7000 will support PerfMonV2, and it is also compatible with
legacy PERFCTR_CORE behavior and msr addresses.
If you don't have access to the hardware specification, the commits
d6d0c7f681fd..7685665c390d for host perf can also bring a quick
overview. Its main change is the addition of three msr's equivalent
to Intel V2, namely global_ctrl, global_status, global_status_clear.
[...]
Applied 1-3 to kvm-x86 pmu. Note, I grabbed my full version of patch 2 that
also converts the "get" path.
My apologies for not reviewing this earlier in the cycle. I need to pivot to
TDX+SNP stuff "soon", so AMD v2 support will likely miss 6.4, but I'll prioritize
reviewing and merging support in 6.5.
Thanks for your review time.
Since the biggest points of discussion so far is around
[PATCH v4 11/12] KVM: x86/svm/pmu: Add AMD PerfMonV2 support,
so once the proposal on that part is confirmed by you, V5 is already in sight.
Thanks!
[01/12] KVM: x86/pmu: Rename pmc_is_enabled() to pmc_is_globally_enabled()
https://github.com/kvm-x86/linux/commit/cdd2fbf6360e
[02/12] KVM: VMX: Refactor intel_pmu_{g,}set_msr() to align with other helpers
https://github.com/kvm-x86/linux/commit/8bca8c5ce40b
[03/12] KVM: x86/pmu: Rewrite reprogram_counters() to improve performance
https://github.com/kvm-x86/linux/commit/649bccd7fac9
--
https://github.com/kvm-x86/linux/tree/next
https://github.com/kvm-x86/linux/tree/fixes
