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SubjectRe: [PATCH RFC] KVM: x86: Drop arbitraty KVM_SOFT_MAX_VCPUS
On Thu, Nov 11, 2021, Paolo Bonzini wrote:
> On 11/11/21 14:47, Vitaly Kuznetsov wrote:
> > diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> > index ac83d873d65b..91ef1b872b90 100644
> > --- a/arch/x86/kvm/x86.c
> > +++ b/arch/x86/kvm/x86.c
> > @@ -4137,7 +4137,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
> > r = !static_call(kvm_x86_cpu_has_accelerated_tpr)();
> > break;
> > case KVM_CAP_NR_VCPUS:
> > - r = KVM_SOFT_MAX_VCPUS;
> > + r = num_online_cpus();

I doubt it matters much in practice, but this really should be

r = min(num_online_cpus(), KVM_MAX_VCPUS);

> > break;
> > case KVM_CAP_MAX_VCPUS:
> > r = KVM_MAX_VCPUS;
> >
>

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