Re: [RFC PATCH 12/41] KVM: x86/pmu: Plumb through passthrough PMU to vcpu for Intel CPUs

[Sean Christopherson]

On Fri, Jan 26, 2024, Xiong Zhang wrote:
> From: Mingwei Zhang <mizhang@xxxxxxxxxx>
> 
> Plumb through passthrough PMU setting from kvm->arch into kvm_pmu on each
> vcpu created. Note that enabling PMU is decided by VMM when it sets the
> CPUID bits exposed to guest VM. So plumb through the enabling for each pmu
> in intel_pmu_refresh().

As stated in the previous patch, even the most naive implementation can be:

static inline bool is_passthrough_pmu_enabled(struct kvm_vcpu *vcpu)
{
	return enable_passthrough_pmu && vcpu_to_pmu(vcpu)->version;
}