Subject: Re: [PATCH 2/2] kvm: rename KVM_MAX_VCPU_ID to KVM_MAX_VCPU_IDS

From: Sean Christopherson <[email-masked]>
Date: Mon, 13 Sep 2021 16:24:11 +0000

On Mon, Sep 13, 2021, Juergen Gross wrote:
> KVM_MAX_VCPU_ID is not specifying the highest allowed vcpu-id, but the
> number of allowed vcpu-ids. This has already led to confusion, so
> rename KVM_MAX_VCPU_ID to KVM_MAX_VCPU_IDS to make its semantics more
> clear

My hesitation with this rename is that the max _number_ of IDs is not the same
thing as the max allowed ID.  E.g. on x86, given a capability that enumerates the
max number of IDs, I would expect to be able to create vCPUs with arbitrary 32-bit
x2APIC IDs so long as the total number of IDs is below the max.