On Thu, Feb 05, 2026 at 10:38:27PM -0000, bertrandlec--- via Devel wrote: > > Bertrand, can you share `lspci -t` output, and also `lspci -vvs 80:00.0` ?
Having read this https://www.techpowerup.com/review/intel-core-ultra-arrow-lake-preview/5.html I think I somewhat understand what your machine is showing here. The CPU itself has integrated PCI host bridge, and then there's a further hostbridge provided by the 800 series chipset > > I don't have any device at address 80:00.0. > > -+-[0000:00]-+-00.0 Intel Corporation Arrow Lake-HX 8p+16e cores Host Bridge > | +-01.0-[04]----00.0 Samsung Electronics Co Ltd NVMe SSD 9100 > PRO [PM9E1] > | +-02.0 Intel Corporation Arrow Lake-S [Intel Graphics] > | +-04.0 Intel Corporation Device ad03 > | +-06.0-[01]--+-00.0 NVIDIA Corporation GB207GLM [RTX PRO 1000 > Blackwell Generation Laptop GPU] > | | \-00.1 NVIDIA Corporation GB207 High Definition > Audio Controller > | +-07.0-[20-49]-- > | +-08.0 Intel Corporation Arrow Lake-HX Gauss Newton Algorithm > (GNA) > | +-0a.0 Intel Corporation Arrow Lake-HX Crash Log & Telemetry > | +-0b.0 Intel Corporation Arrow Lake NPU > | +-0d.0 Intel Corporation Meteor Lake-P Thunderbolt 4 USB > Controller > | +-0d.2 Intel Corporation Meteor Lake-P Thunderbolt 4 NHI #0 > | +-14.0 Intel Corporation Arrow Lake-HX Shared SRAM (SOC-S) > | +-1f.0 Intel Corporation Arrow Lake-HX Direct eSPI Controller > | \-1f.5 Intel Corporation Arrow Lake-HX SPI (flash) Controller So this ^^^^^ is all on the CPU integrated host bridge....and... > \-[0000:80]-+-14.0 Intel Corporation 800 Series PCH USB 3.1 xHCI HC > +-14.5 Intel Corporation Device 7f2f > +-15.0 Intel Corporation 800 Series PCH I2C Controller #0 > +-15.3 Intel Corporation 800 Series PCH I2C Controller #3 > +-16.0 Intel Corporation 800 Series PCH HECI #1 > +-19.0 Intel Corporation 800 Series PCH I2C Controller #4 > +-19.1 Intel Corporation 800 Series PCH I2C Controller #5 > +-1b.0-[83]-- > +-1b.4-[88-d8]----00.0-[89-8d]--+-00.0-[8a]----00.0 Intel > Corporation JHL9580 Thunderbolt 5 80/120G NHI [Barlow Ridge Host 80G 2023] > | +-01.0-[8b]-- > | +-02.0-[8c]----00.0 Intel > Corporation JHL9580 Thunderbolt 5 80/120G USB Controller [Barlow Ridge Host > 80G 2023] > | \-03.0-[8d]-- > +-1c.0-[81]-- > +-1c.6-[86]----00.0 Intel Corporation Ethernet Controller I226-V > +-1d.0-[82]-- > +-1d.4-[85]----00.0 O2 Micro, Inc. Device 9860 > +-1d.6-[84]----00.0 Intel Corporation Wi-Fi 7(802.11be) > AX1775*/AX1790*/BE20*/BE401/BE1750* 2x2 > +-1f.0 Intel Corporation Device 7f12 > +-1f.3 Intel Corporation 800 Series ACE (Audio Context Engine) > +-1f.4 Intel Corporation 800 Series PCH SMBus Controller > \-1f.5 Intel Corporation 800 Series PCH SPI (flash) Controller .....this ^^^ is all on the 800 series chipset host bridge. In sysfs on your machine do you see multiple dir entries at /sys/devices/pciNNNN.NN ??? If so, that's how we can identify the root complexes, regardless of the unexpectedly missing host bridge at 0000:80:00.0 With regards, Daniel -- |: https://berrange.com -o- https://www.flickr.com/photos/dberrange :| |: https://libvirt.org -o- https://fstop138.berrange.com :| |: https://entangle-photo.org -o- https://www.instagram.com/dberrange :|
