On Mon, 8 Apr 2024 13:58:00 +0200 Marcin Juszkiewicz <marcin.juszkiew...@linaro.org> wrote:
> For quite a while I am experimenting with PCI Express setup on SBSA-Ref > system. And finally decided to write. > > We want to play with NUMA setup and "pxb-pcie" can be assigned to NUMA > node other than cpu0 one. But adding it makes other cards dissapear... > > When I boot sbsa-ref I have plain PCIe setup: > > (qemu) info pci > Bus 0, device 0, function 0: > Host bridge: PCI device 1b36:0008 > PCI subsystem 1af4:1100 > id "" > Bus 0, device 1, function 0: > Ethernet controller: PCI device 8086:10d3 > PCI subsystem 8086:0000 > IRQ 255, pin A > BAR0: 32 bit memory at 0xffffffffffffffff [0x0001fffe]. > BAR1: 32 bit memory at 0xffffffffffffffff [0x0001fffe]. > BAR2: I/O at 0xffffffffffffffff [0x001e]. > BAR3: 32 bit memory at 0xffffffffffffffff [0x00003ffe]. > BAR6: 32 bit memory at 0xffffffffffffffff [0x0003fffe]. > id "" > Bus 0, device 2, function 0: > Display controller: PCI device 1234:1111 > PCI subsystem 1af4:1100 > BAR0: 32 bit prefetchable memory at 0x80000000 [0x80ffffff]. > BAR2: 32 bit memory at 0x81084000 [0x81084fff]. > BAR6: 32 bit memory at 0xffffffffffffffff [0x00007ffe]. > id "" > > Adding extra PCIe card works fine - both just "igb" and "igb" with > "pcie-root-port". > > But adding "pcie-root-port" + "igb" and then "pxb-pcie" makes "igb" > dissapear: > > ../code/qemu/build/qemu-system-aarch64 > -monitor telnet::45454,server,nowait > -serial stdio > -device pcie-root-port,id=ULyWl,slot=0,chassis=0 > -device igb,bus=ULyWl > -device pxb-pcie,bus_nr=1 That's setting the base bus number to 1. Very likely to clash with the bus number for the bus below the root port. Set it to bu_nr=128 or something like that. There is no sanity checking for PXBs because the bus enumeration is an EDK2 problem in general - short of enumerating the buses in QEMU there isn't a way for it to tell. J
