[SOLVED] IOMMU passthrough vfio-pci

Software & Operating Systems Linux
, ,
1

running:

grub2-mkconfig -o /etc/grub2-efi.cfg

returns message:

/etc/default/grub: line 6: rd.driver.pre=vfio-pci: command not found

but running:

modinfo vfio-pci

shows:

filename:       /lib/modules/4.18.8-200.fc28.x86_64/kernel/drivers/vfio/pci/vfio-pci.ko.xz
description:    VFIO PCI - User Level meta-driver
author:         Alex Williamson <[email protected]>
license:        GPL v2
version:        0.2
srcversion:     E46B6F702716FC27AA782E7
depends:        vfio,irqbypass,vfio_virqfd
retpoline:      Y
intree:         Y
name:           vfio_pci
vermagic:       4.18.8-200.fc28.x86_64 SMP mod_unload 
sig_id:         PKCS#7
signer:         
sig_key:        
sig_hashalgo:   md4
signature:      30:82:02:CF:06:09:2A:86:48:86:F7:0D:01:07:02:A0:82:02:C0:30:
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		7B:B8:69
parm:           ids:Initial PCI IDs to add to the vfio driver, format is "vendor:device[:subvendor[:subdevice[:class[:class_mask]]]]" and multiple comma separated entries can be specified (string)
parm:           nointxmask:Disable support for PCI 2.3 style INTx masking.  If this resolves problems for specific devices, report lspci -vvvxxx to [email protected] so the device can be fixed automatically via the broken_intx_masking flag. (bool)
parm:           disable_vga:Disable VGA resource access through vfio-pci (bool)
parm:           disable_idle_d3:Disable using the PCI D3 low power state for idle, unused devices (bool)

any suggestions?

2

What distro you are running and the contents of /etc/default/grub would be useful.

If you are trying to load the vfio-pci module, it should be put in modules(file name/location depends on distro), then update your initramfs.

If you are trying to isolate a gpu with vfio-pci then use vfio-pci.ids=id in grub.

1 Like
3

I’m using fedora 28, and basically went wendels fedora 26 recipe how to set it up, thats why I’m a little bit unsure whats going on, cause it seem pretty straight forward, searching on google didn’t give me any usefull results in the first 20 hits

cat /etc/default/grub

GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved amd_iommu=on
GRUB_DISABLE_SUBMENU=false
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="resume=UUID=012d9466-2d6a-452b-910d-e86cfc5ec564 rd.lvm.lv=fedora_localhost-live/root rd.lvm.lv=fedora_localhost-live/swap rhgb quiet rd.driver.blacklist=nouveau iommu=1 amd_iommu=on " rd.driver.pre=vfio-pci
GRUB_DISABLE_RECOVERY="true"

actually code highlighting shows it here wrong placement of ending "

:smiley: I better go into hiding right now. thanks for making me copy it, otherwise it would have taken me days to figure it out.

1 Like
4

Glad to help, minor syntax errors are sometimes the worst to troubleshoot but the easiest to fix.

Also, don’t forget to mark as solved.

1 Like