For those with coreboot firmware, particularly Protectli units that have the optional UEFI, I'm curious if you have control over power management (e.g. ASPM and PowerD/SpeedStep) at the OS level?
The coreboot/Dasharo menu itself doesn't have options for those, so I'm not sure if that means the functions are locked at whatever the manufacturer set them to. I have disabled PowerD in OPNsense and also set the tunable 'hw.pci.enable_aspm=0,' but this is what I see on reboot:
root@firewall:~ # sysctl hw.pci.enable_aspm
hw.pci.enable_aspm: 0
root@firewall:~ # pciconf -lcv igc2
igc2@pci0:4:0:0: class=0x020000 rev=0x04 hdr=0x00 vendor=0x8086 device=0x125c subvendor=0x8086 subdevice=0x0000
vendor = 'Intel Corporation'
device = 'Ethernet Controller I226-V'
class = network
subclass = ethernet
cap 01[40] = powerspec 3 supports D0 D3 current D0
cap 05[50] = MSI supports 1 message, 64 bit, vector masks
cap 11[70] = MSI-X supports 5 messages, enabled
Table in map 0x1c[0x0], PBA in map 0x1c[0x2000]
cap 10[a0] = PCI-Express 2 endpoint max data 256(512) FLR RO NS
max read 512
link x1(x1) speed 5.0(5.0) ASPM L1(L1)
ecap 0001[100] = AER 2 0 fatal 0 non-fatal 0 corrected
ecap 0003[140] = Serial 1 <redacted>
ecap 0018[1c0] = LTR 1
ecap 001f[1f0] = Precision Time Measurement 1
ecap 001e[1e0] = L1 PM Substates 1
root@firewall:~ # sysctl dev.cpu.0
dev.cpu.0.temperature: 34.0C
dev.cpu.0.coretemp.throttle_log: 0
dev.cpu.0.coretemp.tjmax: 105.0C
dev.cpu.0.coretemp.resolution: 1
dev.cpu.0.coretemp.delta: 71
dev.cpu.0.cx_method: C1/mwait/hwc C2/mwait/hwc C3/mwait/hwc
dev.cpu.0.cx_usage_counters: 347858 0 0
dev.cpu.0.cx_usage: 100.00% 0.00% 0.00% last 322us
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_supported: C1/1/1 C2/2/127 C3/3/253
dev.cpu.0.freq_levels: 2001/10000 2000/10000 1800/8793 1600/7632 1400/6524 1200/5466 1000/4445 800/3472
dev.cpu.0.freq: 2001
dev.cpu.0.%iommu:
dev.cpu.0.%parent: acpi0
dev.cpu.0.%pnpinfo: _HID=ACPI0007 _UID=0 _CID=none
dev.cpu.0.%location: handle=\_SB_.CP00
dev.cpu.0.%driver: cpu
dev.cpu.0.%desc: ACPI CPU
If I'm interpreting correctly, the settings had no effect and power management is still fully active. Is that correct/expected?
On second thought, I think at least the PowerD disablement worked. "dev.cpu.0.cx_lowest: C1"
Not sure why the NIC still says ASPM L1(L1), which is the same as before the change.