On 31/10/19 16:17, Suthikulpanit, Suravee wrote: > What if we change kvm->arch.apicv_state to kvm->arch.apicv_disable_mask > and have each bit representing the reason for deactivating APICv. > > For example: > #define APICV_DISABLE_MASK_IRQWIN 0 > #define APICV_DISABLE_MASK_HYPERV 1 > #define APICV_DISABLE_MASK_PIT_REINJ 2 > #define APICV_DISABLE_MASK_NESTED 3 > > In this case, we activate APICv only if kvm->arch.apicv_disable_mask == > 0. This way, we can find out why APICv is deactivated on a particular VM > at a particular point in time. Yes, that also works for me if it makes for an easier implementation. Paolo
