On Tue, Jul 03, 2018 at 03:42:02PM +0200, Vitaly Kuznetsov wrote: > Hyper-V TLFS (5.0b) states: > > > Virtual processors are identified by using an index (VP index). The > > maximum number of virtual processors per partition supported by the > > current implementation of the hypervisor can be obtained through CPUID > > leaf 0x40000005. A virtual processor index must be less than the > > maximum number of virtual processors per partition. > > Forbid userspace to set VP_INDEX above KVM_MAX_VCPUS. get_vcpu_by_vpidx() > can now be optimized to bail early when supplied vpidx is >= KVM_MAX_VCPUS. > > Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx> > --- > arch/x86/kvm/hyperv.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) Reviewed-by: Roman Kagan <rkagan@xxxxxxxxxxxxx>
