Re: [PATCH v4 1/2] KVM: remove NULL return path for vcpu ids >= KVM_MAX_VCPUS

[Cornelia Huck]

On Thu, 21 Apr 2016 16:15:05 +0200
Greg Kurz <gkurz@xxxxxxxxxxxxxxxxxx> wrote:

> Commit c896939f7cff ("KVM: use heuristic for fast VCPU lookup by id") added
> a return path that prevents vcpu ids to exceed KVM_MAX_VCPUS. This is a
> problem for powerpc where vcpu ids can grow up to 8*KVM_MAX_VCPUS.
> 
> This patch simply reverses the logic so that we only try fast path if the
> vcpu id can be tried as an index in kvm->vcpus[]. The slow path is not
> affected by the change.
> 
> Signed-off-by: Greg Kurz <gkurz@xxxxxxxxxxxxxxxxxx>
> ---
>  include/linux/kvm_host.h |    7 ++++---
>  1 file changed, 4 insertions(+), 3 deletions(-)

Reviewed-by: Cornelia Huck <cornelia.huck@xxxxxxxxxx>