Hi Thilo, My guess is that you need to add a node to the device tree. I would look at the device tree generated for Arm and see if you can pattern match what you need to add for RISC-V.
Cheers, Jason On Mon, Oct 2, 2023 at 1:12 AM Thilo Voertler via gem5-users < gem5-users@gem5.org> wrote: > Hi all, > > > > I’m trying to add support for 9p to the riscv-fs platform > (configs/example/gem5_library/riscv-fs.py) similar to the way it was done > for arm systems using the def attach_9p function > (configs/common/FSConfig.py). > > Summary: > > > > When trying to mount on the guest I get an error > > mount -t 9p -o > trans=virtio,version=9p2000.L,aname=/gem5rundir/m5out/9p/share gem5 /mnt/9p > > mount: mounting gem5 on /mnt/9p failed: No such file or directory > > > > The reason seems to be that VirtIO9PDiod device is not set up correctly > under my Platform or Linux so that Linux can find the gem5 tag used for > sharing. > > > > Details: > > I created my own board, which derives from the RiscvBoard and overwrites > the function: > > > > class COSRiscvBoard(RiscvBoard): > > @overrides(AbstractSystemBoard) > > def _setup_io_devices(self) -> None: > > super()._setup_io_devices() > > self.add_riscv_9p() > > def add_riscv_9p(self): > > print(f"Function _setup_board Adding 9p device to platform") > > self.viopci = PciVirtIO(pci_bus=0, pci_dev=1, # Hardcoded for the > platform, Ethernet in RiscV Board is 0 > > pci_func=0, InterruptPin=1, > > InterruptLine=1) > > self.viopci.vio = VirtIO9PDiod() > > viodir = os.path.realpath(os.path.join(m5.options.outdir, "9p")) > > self.viopci.vio.root = os.path.join(viodir, "share") > > self.viopci.vio.socketPath = os.path.join(viodir, "socket") > > os.makedirs(self.viopci.vio.root, exist_ok=True) > > if os.path.exists(self.viopci.vio.socketPath): > > os.remove(self.viopci.vio.socketPath) > > > > self.viopci.host = self.platform.pci_host > > self.viopci.pio = self.iobus.mem_side_ports > > self.viopci.dma = self.iobus.cpu_side_ports > > > > I rebuilt the Linux with virtio9p support as described in > http://old.gem5.org/WA-gem5.html under guest system requirements. During > boot I see the new attached virtio-pci device (in Addition to the Ethernet > device of the platfrom). > > [ 1.824575] pci-host-generic 30000000.pci: host bridge /soc/pci ranges: > > [ 1.825257] pci-host-generic 30000000.pci: No bus range found for > /soc/pci, using [bus 00-ff] > > [ 1.826709] pci-host-generic 30000000.pci: IO > 0x002f000000..0x002f00ffff -> 0x0000000000 > > [ 1.827637] pci-host-generic 30000000.pci: MEM > 0x0040000000..0x007fffffff -> 0x0000000000 > > [ 1.899228] pci-host-generic 30000000.pci: ECAM at [mem > 0x30000000-0x3fffffff] for [bus 00-ff] > > [ 1.902419] pci-host-generic 30000000.pci: PCI host bridge to bus > 0000:00 > > [ 1.902923] pci_bus 0000:00: root bus resource [bus 00-ff] > > [ 1.903470] pci_bus 0000:00: root bus resource [io 0x0000-0xffff] > > [ 1.904121] pci_bus 0000:00: root bus resource [mem > 0x40000000-0x7fffffff] (bus address [0x00000000-0x3fffffff]) > > [ 1.905119] pci 0000:00:00.0: [8086:1075] type 00 class 0x020000 > > [ 1.906011] pci 0000:00:00.0: reg 0x10: [mem 0x40000000-0x4001ffff] > > [ 1.906941] pci 0000:00:00.0: reg 0x30: [mem 0x40000000-0x400007ff pref] > > *[ 1.911587] pci 0000:00:01.0: [1af4:1000] type 00 class 0xff0000* > > *[ 1.912321] pci 0000:00:01.0: reg 0x10: [io 0x0000-0x001f]* > > [ 1.913207] pci 0000:00:01.0: reg 0x30: [mem 0x40000000-0x400007ff pref] > > [ 1.923427] pci 0000:00:00.0: BAR 0: assigned [mem > 0x40000000-0x4001ffff] > > [ 1.924118] pci 0000:00:00.0: BAR 6: assigned [mem > 0x40020000-0x400207ff pref] > > [ 1.924809] pci 0000:00:01.0: BAR 6: assigned [mem > 0x40020800-0x40020fff pref] > > [ 1.925486] pci 0000:00:01.0: BAR 0: assigned [io 0x0000-0x001f] > > > > However I get an error when loading the virtio-pci driver > > [ 1.939684] virtio-pci 0000:00:01.0: enabling device (0000 -> 0001) > > [ 1.940263] virtio-pci 0000:00:01.0: virtio_pci: leaving for legacy > driver > > [ 1.940742] virtio-pci: probe of 0000:00:01.0 failed with error -12 > > There is also no device that provides the gem5 tag under > /sys/bus/virtio/drivers/9pnet_virtio/virtio<n>/mount_tag files ( > https://www.kernel.org/doc/Documentation/filesystems/9p.txt) > > root@UCanLinux:~ # ls /sys/bus/virtio/drivers/9pnet_virtio/ > > bind module uevent unbind > > I also checked that diod is in the path and I get message that it was > started. > > > > Anyone an idea why it is not working or what I can try to run it again > > > > Best Regards, > > > > Thilo > _______________________________________________ > gem5-users mailing list -- gem5-users@gem5.org > To unsubscribe send an email to gem5-users-le...@gem5.org >
_______________________________________________ gem5-users mailing list -- gem5-users@gem5.org To unsubscribe send an email to gem5-users-le...@gem5.org
