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In current form, the default domain acts like any schedulable domain. TSGs are bound to it and it can be enumerated via the public interfaces. The new expectation for the default domain is meant to change from the current form to a pseudo domain that cannot act like an ordinary domain in other ways, i.e. it must not be reachable by in particular the domain management API, it can't be removed, does not show up in lists, and TSGs cannot be explicitly bound to this domain. It won't participate in round-robin domain scheduling. It is not really a domain, and acts like one only when activated in the manual mode. Following changes are made overall to support the above change in definition. 1) Domain creation and attaching the domain to the scheduler are now split into two separate functions. The new default domain (having ID = UINT64_MAX) is created separately from a static function without linking it with other domains in the scheduler. 2) struct nvgpu_nvs_scheduler explicitely stores the default domain to support direct lookups. 3) TSGs are initially not bound to default domain/rl_domain. Jira NVGPU-8165 Signed-off-by: Debarshi Dutta <ddutta@nvidia.com> Change-Id: I916d11f4eea5124d8d64176dc77f3806c6139695 Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2697477 Tested-by: mobile promotions <svcmobile_promotions@nvidia.com> Reviewed-by: mobile promotions <svcmobile_promotions@nvidia.com>