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fix second iommu

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RootHost-Stormwind
2025-11-04 21:53:55 +01:00
parent fc6c9eb681
commit e91b6468b3
1 changed files with 16 additions and 6 deletions
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22
hardware-configuration.nix
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@@ -8,11 +8,11 @@
[ (modulesPath + "/installer/scan/not-detected.nix")
];
# 1) Make sure vfio and vfio_pci are in the initrd
boot.initrd.kernelModules = [ "vfio" "vfio_pci" ];
# 1) Make sure modules are available early so the probe can succeed
boot.initrd.kernelModules = [ "vfio" "vfio_pci" "vfio_iommu_type1" "ahci" ];
# 2) Also load them again in the running system
boot.kernelModules = [ "vfio" "vfio_pci" ];
boot.kernelModules = [ "vfio" "vfio_pci" "vfio_iommu_typoe1" "ahci" ];
# 3) Kernel params to turn on IOMMU and bind your card to vfio-pci
boot.kernelParams = lib.mkForce [
@@ -22,13 +22,23 @@
# helps isolate PCIe ports if your card shares groups
"pci_acs_override=downstream,multifunction"
# <<< the important bit: early vfio binding for 1b4b:9215 >>>
"vfio-pci.ids=1b4b:9215"
];
boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usb_storage" "usbhid" "sd_mod" ];
# Bind per-device via udev using driver_override and drivers_probe
services.udev.extraRules = ''
# Bind 0000:09:00.0 to vfio-pci
ACTION=="add", SUBSYSTEM=="pci", KERNEL=="0000:09:00.0", \
ATTR{driver_override}="vfio-pci", \
RUN+="/bin/sh -c 'modprobe vfio-pci; echo 0000:09:00.0 > /sys/bus/pci/drivers_probe'"
# Bind 0000:08:00.0 to ahci (host)
ACTION=="add", SUBSYSTEM=="pci", KERNEL=="0000:08:00.0", \
ATTR{driver_override}="ahci", \
RUN+="/bin/sh -c 'modprobe ahci; echo 0000:08:00.0 > /sys/bus/pci/drivers_probe'"
'';
boot.kernel.sysctl."net.ipv4.conf.all.forwarding" = true;
swapDevices =