Messages in this thread | ![/](/images/icornerl.gif) | | Date | Tue, 24 Jan 2023 10:31:00 -0500 | Subject | Re: [PATCH] perf/x86: KVM: Disable vPMU support on hybrid CPUs (host PMUs) | From | "Liang, Kan" <> |
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On 2023-01-23 8:04 p.m., Andi Kleen wrote: > >> If I understand correct, the workaround in KVM is to add a white/black >> list to filter the events. I think we can do the same thing for the >> hybrid machine for now. >> https://lore.kernel.org/lkml/CAOyeoRUUK+T_71J=+zcToyL93LkpARpsuWSfZS7jbJq=wd1rQg@mail.gmail.com/ > > > This will make everyone who actually wants to use the PMU sad.
Yes, but we still have all the architecture events work. I think it should be good enough as a short-term solution, when the hybrid is not completely supported in KVM. > > It's reasonable if the vCPUs are not bound, but if they are bound it > would be better to expose it with a suitable CPUID for the types. >
Yes, and also the CPUID leaf 0x23H support to enumerate the PMU features of each types.
Thanks, Kan
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