[PATCH v6 00/44] KVM: x86: Add support for mediated vPMUs

Peter Zijlstra peterz at infradead.org
Mon Dec 8 07:37:38 PST 2025


On Fri, Dec 05, 2025 at 04:16:36PM -0800, Sean Christopherson wrote:
> My hope/plan is that the perf changes will go through the tip tree with a
> stable tag/branch, and the KVM changes will go the kvm-x86 tree.

> Kan Liang (7):
>   perf: Skip pmu_ctx based on event_type
>   perf: Add generic exclude_guest support
>   perf: Add APIs to create/release mediated guest vPMUs
>   perf: Clean up perf ctx time
>   perf: Add a EVENT_GUEST flag
>   perf: Add APIs to load/put guest mediated PMU context
>   perf/x86/intel: Support PERF_PMU_CAP_MEDIATED_VPMU
> 
> Mingwei Zhang (3):
>   perf/x86/core: Plumb mediated PMU capability from x86_pmu to
>     x86_pmu_cap
>
> Sandipan Das (3):
>   perf/x86/core: Do not set bit width for unavailable counters
>   perf/x86/amd: Support PERF_PMU_CAP_MEDIATED_VPMU for AMD host
> 
> Sean Christopherson (19):
>   perf: Move security_perf_event_free() call to __free_event()
>   perf/x86/core: Register a new vector for handling mediated guest PMIs
>   perf/x86/core: Add APIs to switch to/from mediated PMI vector (for
>     KVM)

That all looks to be in decent shape; lets go get this merged. There is
the nit on patch 4 and I think a number of the exports want to be
EXPORT_SYMBOL_FOR_KVM() instead, but we can do that on top.

I'll queue these patches after rc1.



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