On Fri, 2024-06-07 at 17:06 -0700, Sean Christopherson wrote: > Register KVM's cpuhp and syscore callbacks when enabling virtualization in > hardware, as the sole purpose of said callbacks is to disable and re-enable > virtualization as needed. > > The primary motivation for this series is to simplify dealing with enabling > virtualization for Intel's TDX, which needs to enable virtualization > when kvm-intel.ko is loaded, i.e. long before the first VM is created. TDX > doesn't _need_ to keep virtualization enabled, but doing so is much simpler > for KVM (see patch 3). > > That said, this is a nice cleanup on its own, assuming I haven't broken > something. By registering the callbacks on-demand, the callbacks themselves > don't need to check kvm_usage_count, because their very existence implies a > non-zero count. > > For this series, Acked-by: Kai Huang <kai.huang@xxxxxxxxx>
