Rebase on 4.15

[crawfxrd]

Replaces: #65, #66, #69, #74, #76

Ref: system76/firmware-open#260

TODO

• Rebase on the actual 4.15 release, scheduled for November 1st 5th
  • Rebased ahead to include all mainboards and most SoC changes we need
• Check that the HECI device is disabled at runtime if the CSME is disabled
  • Tested on oryp8 (TGL-H), gaze15 (CML-H), oryp5 (CFL-H), and galp3-c (WHL-U)
• Reevaluate if we need to force NVIDIA GPU prefetch resources about 4GB
  • Yeah, 30 series wants to claim 16GB for prefmem...
• Cherry-pick TGL TBT fixes
  • Included in rebase now
• Potentially, replace IME config with Star Labs' implementation

Testing

Needs testing on, preferably, all boards

• addw1
• addw2
• bonw14
• darp5
• darp6
• darp7
• galp2
• galp3
• galp3-b
• galp3-c
• galp4
• galp5
• gaze14
• gaze15
• gaze16-3050
• gaze16-3060
• gaze16-3060-b
• lemp9
• lemp10
• oryp5
• oryp6
• oryp7
• oryp8

Intel Management Engine

IME mode is now controlled by a CMOS option (except on KBL which uses me_cleaner, and so doesn't apply).

• CNL-based and TGL-H boards default to disabled*
• TGL-U boards default to enabled

Changing IME modes triggers a global reset to complete the switch. As such, the first boot after flashing will power off for most boards.

The HECI device (00:16.0) is enabled in devicetree in order to trigger the reset and report ME status/version. It will be disabled (except on TGL-U) before the payload runs.

[crawfxrd]

Getting this on gaze16-3050 and oryp8:

irq 10: nobody cared (try booting with the "irqpoll" option)
CPU: 14 PID: 0 Comm: swapper/14 Tainted: P           OE     5.14.9-76051409-generic #202109300934~1633018643~21.10~6609c34
Hardware name: System76 Gazelle/Gazelle, BIOS 2021-09-30_43e3cb1 09/29/2021
Call Trace:
 <IRQ>
 show_stack+0x52/0x58
 dump_stack_lvl+0x4a/0x5f
 dump_stack+0x10/0x12
 __report_bad_irq+0x3a/0xaf
 note_interrupt.cold+0xb/0x60
 handle_irq_event+0xa7/0xb0
 handle_fasteoi_irq+0x7d/0x1c0
 __common_interrupt+0x48/0xb0
 common_interrupt+0x88/0xa0
 </IRQ>
 asm_common_interrupt+0x1e/0x40
RIP: 0010:poll_idle+0x9b/0xb9
Code: 44 89 e8 41 5c 41 5d 41 5e 41 5f 5d c3 4c 89 f7 48 89 de e8 c7 81 d4 ff 49 89 c6 b8 c9 00 00 00 49 8b 17 83 e2 08 75 b1 f3 90 <83> e8 01 >
RSP: 0018:ffffbb8480103e18 EFLAGS: 00000246
RAX: 000000000000007c RBX: ffffdb847fd80b00 RCX: 000000000000001f
RDX: 0000000000000000 RSI: 00000000378e38e3 RDI: fffffffd126cf3b3
RBP: ffffbb8480103e40 R08: 00000000fc993634 R09: 0000000000000004
R10: 0000000000000000 R11: 071c71c71c71c71c R12: 00000000fc95b58c
R13: 0000000000000000 R14: 000000000003d090 R15: ffff9f1b40ba5d00
 ? poll_idle+0xac/0xb9
 cpuidle_enter_state+0x95/0x3e0
 cpuidle_enter+0x2e/0x40
 cpuidle_idle_call+0x132/0x1d0
 do_idle+0x83/0xf0
 cpu_startup_entry+0x20/0x30
 start_secondary+0x127/0x160
 secondary_startup_64_no_verify+0xc2/0xcb
handlers:
[<000000007c3451a7>] azx_interrupt [snd_hda_codec]
Disabling IRQ #10