Messages in this thread | | | Date | Tue, 31 Jan 2023 11:59:31 +0100 | From | Peter Zijlstra <> | Subject | Re: [PATCH] perf/x86: KVM: Disable vPMU support on hybrid CPUs (host PMUs) |
| |
On Tue, Jan 24, 2023 at 10:31:00AM -0500, Liang, Kan wrote:
> Yes, and also the CPUID leaf 0x23H support to enumerate the PMU features > of each types.
Note that this is not enough or even useful. There is nothing that stops a vCPU from migrating between types at every instruction. There simply is no relation between a vCPU and a type, so knowing what a type does or does not support is useless information.
| |