nvme: Add support for Controller Memory Buffers
Implement NVMe Controller Memory Buffers (CMBs) which were added in version 1.2 of the NVMe Specification. This patch adds an optional argument (cmb_size_mb) which indicates the size of the CMB (in MB). Currently only the Submission Queue Support (SQS) is enabled which aligns with the current Linux driver for NVMe. Signed-off-by: NStephen Bates <sbates@raithlin.com> Acked-by: NKeith Busch <keith.busch@intel.com> Signed-off-by: NKevin Wolf <kwolf@redhat.com>
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