On Mon, Mar 24, 2025, Mingwei Zhang wrote:
> static void kvm_pmu_incr_counter(struct kvm_pmc *pmc)
> {
> - pmc->emulated_counter++;
> - kvm_pmu_request_counter_reprogram(pmc);
> + struct kvm_vcpu *vcpu = pmc->vcpu;
> +
> + /*
> + * For perf-based PMUs, accumulate software-emu
From: Dapeng Mi
Mediated vPMU needs to accumulate the emulated instructions into counter
and load the counter into HW at vm-entry.
Moreover, if the accumulation leads to counter overflow, KVM needs to
update GLOBAL_STATUS and inject PMI into guest as well.
Suggested-by: Sean Christopherson
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