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Should we use RTP to enable CCS engines?

https://lore.kernel.org/all/Y9hw0sSC58B32yPg@mdroper-desk1.amr.corp.intel.com/

  • } *e, extra_regs[] = {
  •       { .reg = RING_MODE_GEN7(hwe->mmio_base).reg,            },                                                                                                                                                                     
  •       { .reg = RING_HWS_PGA(hwe->mmio_base).reg,              },                                                                                                                                                                     
  •       { .reg = RING_IMR(hwe->mmio_base).reg,                  },                                                                                                                                                                     
  •       { .reg = GEN12_RCU_MODE.reg, .flags = 0x3,

The programming of RCU_MODE (i.e., enabling the CCS engines) should
probably be handled through RTP now?