SR-IOV cannot be turned on. #1

Alion548 · 2022-09-27T12:36:38Z

Thank you very much for making dkms, but I have a problem using it.

uname -a
Linux 5.19.11-xm1.0.fc36.x86_64 #1 SMP Sun Sep 25 00:27:08 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

dkms status                       
i915-sriov/dkms, 5.19.11-xm1.0.fc36.x86_64, x86_64: installed (original_module exists)

modinfo i915 | grep extra                                  
filename:       /lib/modules/5.19.11-xm1.0.fc36.x86_64/extra/i915.ko

modprobe --show-depends i915
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/video/fbdev/core/sysimgblt.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/video/fbdev/core/sysfillrect.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/video/fbdev/core/syscopyarea.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/video/fbdev/core/fb_sys_fops.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/i2c/algos/i2c-algo-bit.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/gpu/drm/drm.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/gpu/drm/drm_kms_helper.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/media/rc/rc-core.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/media/cec/core/cec.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/gpu/drm/display/drm_display_helper.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/gpu/drm/ttm/ttm.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/acpi/video.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/kernel/drivers/gpu/drm/drm_buddy.ko 
insmod /lib/modules/5.19.11-xm1.0.fc36.x86_64/extra/i915.ko enable_guc=7 

cat /etc/default/grub                           
GRUB_TIMEOUT=1
GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"
GRUB_DEFAULT=saved
GRUB_DISABLE_SUBMENU=true
GRUB_TERMINAL_OUTPUT="console"
GRUB_CMDLINE_LINUX="selinux=0 mitigations=off intel_iommu=on iommu=pt i915.enable_guc=7 rhgb quiet"
GRUB_DISABLE_RECOVERY="true"
GRUB_ENABLE_BLSCFG=true
GRUB_RECORDFAIL_TIMEOUT=$GRUB_TIMEOUT

I get the following error when enabling the SR-IOV feature.

echo 3 > /sys/devices/pci0000:00/0000:00:02.0/sriov_numvfs 
echo: write error

dmesg | grep i915                                         
[    0.000000] Command line: BOOT_IMAGE=(hd3,gpt2)/vmlinuz-5.19.11-xm1.0.fc36.x86_64 root=UUID=921acc2f-21f1-4778-a88f-7141be5e3318 ro selinux=0 mitigations=off intel_iommu=on iommu=pt i915.enable_guc=7 rhgb quiet
[    0.072646] Kernel command line: BOOT_IMAGE=(hd3,gpt2)/vmlinuz-5.19.11-xm1.0.fc36.x86_64 root=UUID=921acc2f-21f1-4778-a88f-7141be5e3318 ro selinux=0 mitigations=off intel_iommu=on iommu=pt i915.enable_guc=7 rhgb quiet
[    1.503002] i915 0000:00:02.0: [drm] Incompatible option enable_guc=7 - undocumented flag
[    1.503595] i915 0000:00:02.0: [drm] VT-d active for gfx access
[    1.503644] i915 0000:00:02.0: vgaarb: deactivate vga console
[    1.503666] i915 0000:00:02.0: [drm] Transparent Hugepage mode 'huge=within_size'
[    1.504232] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    1.505269] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/adls_dmc_ver2_01.bin (v2.1)
[    1.606709] i915 0000:00:02.0: [drm] GuC firmware i915/tgl_guc_70.1.1.bin version 70.1
[    1.606712] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc_7.9.3.bin version 7.9
[    1.609764] i915 0000:00:02.0: [drm] HuC authenticated
[    1.610002] i915 0000:00:02.0: [drm] GuC submission enabled
[    1.610002] i915 0000:00:02.0: [drm] GuC SLPC enabled
[    1.610392] i915 0000:00:02.0: [drm] GuC RC: enabled
[    1.611243] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected content support initialized
[    1.631852] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
[    1.660174] fbcon: i915drmfb (fb0) is primary device
[    1.660177] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[    8.641921] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[    8.642977] mei_pxp 0000:00:16.0-fbf6fcf1-96cf-4e2e-a6a6-1bab8cbe36b1: bound 0000:00:02.0 (ops i915_pxp_tee_component_ops [i915])
[   50.838155] i915 0000:00:02.0: driver does not support SR-IOV configuration via sysfs

strongtz · 2022-09-27T14:32:15Z

There might be some problem with your DKMS configuration, and you're probably still using the old driver.

[ 1.503002] i915 0000:00:02.0: [drm] Incompatible option enable_guc=7 - undocumented flag

The flag is certainly documented in this driver.

anyway, here's what should happen with this driver

[    4.626212] i915: loading out-of-tree module taints kernel.
[    4.640255] i915: module verification failed: signature and/or required key missing - tainting kernel
[    4.773789] Setting dangerous option enable_guc - tainting kernel
[    4.828300] i915 0000:00:02.0: i915_virtualization_probe: entry
[    4.829034] i915 0000:00:02.0: i915_sriov_probe: entry
[    4.829804] i915 0000:00:02.0: i915_sriov_probe: gen12_pci_capability_is_vf in
[    4.830666] i915 0000:00:02.0: i915_sriov_probe: dev_is_pf in
[    4.831490] i915 0000:00:02.0: pf_verify_readiness: entry
[    4.832287] i915 0000:00:02.0: pf_verify_readiness: pf_reduce_totalvfs
[    4.832659] i915 0000:00:02.0: i915_sriov_probe: I915_IOV_MODE_SRIOV_PF
[    4.833028] i915 0000:00:02.0: i915_sriov_probe returns: 3
[    4.833397] i915 0000:00:02.0: Running in SR-IOV PF mode
[    4.834368] i915 0000:00:02.0: [drm] VT-d active for gfx access
[    4.835133] i915 0000:00:02.0: [drm] Transparent Hugepage mode 'huge=within_size'
[    4.835871] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=none:owns=io+mem
[    4.839486] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/adls_dmc_ver2_01.bin (v2.1)
[    4.946002] i915 0000:00:02.0: [drm] GuC firmware i915/tgl_guc_70.1.1.bin version 70.1
[    4.946007] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc_7.9.3.bin version 7.9
[    4.948160] i915 0000:00:02.0: [drm] HuC authenticated
[    4.948460] i915 0000:00:02.0: [drm] GuC submission enabled
[    4.948461] i915 0000:00:02.0: [drm] GuC SLPC enabled
[    4.948775] i915 0000:00:02.0: [drm] GuC RC: enabled
[    4.949864] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected content support initialized
[    4.950286] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
[    4.979109] i915 0000:00:02.0: 7 VFs could be associated with this PF

Alion548 · 2022-09-27T16:32:41Z

Solved, xanmod does not support dkms.

xTechon · 2022-10-06T17:15:57Z

I have the same issue, while I have a kernel that supports dkms, it would be very helpful to briefly list the process of switching from the old module to the dkms version. I am using systemd-boot for the drive encryption

uname -a
Linux DellXPS13 5.19.12-arch1-1 #1 SMP PREEMPT_DYNAMIC Wed, 28 Sep 2022 13:21:25 +0000 x86_64 GNU/Linux

dkms status | grep i915
i915-sriov-dkms/5.15.49, 5.19.12-arch1-1, x86_64: installed (original_module exists)

modinfo i915 | grep filename
filename:       /lib/modules/5.19.12-arch1-1/updates/dkms/i915.ko.zst

modprobe --show-depends i915
insmod /lib/modules/5.19.12-arch1-1/kernel/drivers/char/agp/intel-gtt.ko.zst
insmod /lib/modules/5.19.12-arch1-1/kernel/drivers/media/cec/core/cec.ko.zst
insmod /lib/modules/5.19.12-arch1-1/kernel/drivers/gpu/drm/display/drm_display_helper.ko.zst
insmod /lib/modules/5.19.12-arch1-1/kernel/drivers/gpu/drm/ttm/ttm.ko.zst
insmod /lib/modules/5.19.12-arch1-1/kernel/drivers/acpi/video.ko.zst
insmod /lib/modules/5.19.12-arch1-1/kernel/drivers/gpu/drm/drm_buddy.ko.zst
insmod /lib/modules/5.19.12-arch1-1/updates/dkms/i915.ko.zst enable_guc=7

cat /boot/loader/entries/arch.conf
title Arch Linux
linux /vmlinuz-linux
initrd /intel-ucode.img
initrd /initramfs-linux.img
options cryptdevice=UUID=[censored]:vg0 root=[censored] resume=[censored] rw intel_pstate=no_hwp
options CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=yes intel_iommu=on iommu=pt i915.enable_guc=7

modinfo also shows documentation for flagging enable_guc=4 but that gave the same error regardless (i'll skip the description)

modinfo i915 | grep enable_guc
parm:           enable_guc:...(-1=auto [default], 0=disable, 1=GuC submission, 2=HuC load, 4=SR-IOV PF) (int)

my log output, I have an encrypted drive, so I censored a few things

dmesg | grep i915
[    0.000000] Command line: initrd=\intel-ucode.img initrd=\initramfs-linux.img cryptdevice=UUID=[censored]:vg0 root=[censored] resume=[censored] rw intel_pstate=no_hwp CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=yes intel_iommu=on iommu=pt i915.enable_guc=7
[    0.032921] Kernel command line: initrd=\intel-ucode.img initrd=\initramfs-linux.img cryptdevice=UUID=[censored]:vg0 root=[censored] resume=[censored] rw intel_pstate=no_hwp CONFIG_CFG80211_USE_KERNEL_REGDB_KEYS=yes intel_iommu=on iommu=pt i915.enable_guc=7
[    0.876029] i915 0000:00:02.0: [drm] Incompatible option enable_guc=7 - undocumented flag
[    0.876335] i915 0000:00:02.0: [drm] VT-d active for gfx access
[    0.876446] i915 0000:00:02.0: vgaarb: deactivate vga console
[    0.876476] i915 0000:00:02.0: [drm] Transparent Hugepage mode 'huge=within_size'
[    0.878276] i915 0000:00:02.0: vgaarb: changed VGA decodes: olddecodes=io+mem,decodes=io+mem:owns=io+mem
[    0.879506] i915 0000:00:02.0: [drm] Finished loading DMC firmware i915/tgl_dmc_ver2_12.bin (v2.12)
[    1.023844] i915 0000:00:02.0: [drm] GuC firmware i915/tgl_guc_70.1.1.bin version 70.1
[    1.023847] i915 0000:00:02.0: [drm] HuC firmware i915/tgl_huc_7.9.3.bin version 7.9
[    1.027756] i915 0000:00:02.0: [drm] HuC authenticated
[    1.028287] i915 0000:00:02.0: [drm] GuC submission enabled
[    1.028288] i915 0000:00:02.0: [drm] GuC SLPC enabled
[    1.028903] i915 0000:00:02.0: [drm] GuC RC: enabled
[    1.032153] i915 0000:00:02.0: [drm] Protected Xe Path (PXP) protected content support initialized
[    1.047889] [drm] Initialized i915 1.6.0 20201103 for 0000:00:02.0 on minor 0
[    1.055570] fbcon: i915drmfb (fb0) is primary device
[    1.081821] i915 0000:00:02.0: [drm] fb0: i915drmfb frame buffer device
[   15.301784]  encrypted_keys trusted asn1_encoder tee tpm rng_core dm_mod serio_raw rtsx_pci_sdmmc atkbd crct10dif_pclmul mmc_core libps2 vivaldi_fmap crc32_pclmul ghash_clmulni_intel aesni_intel crypto_simd nvme cryptd xhci_pci rtsx_pci nvme_core xhci_pci_renesas i8042 serio i915 intel_gtt drm_buddy video drm_display_helper cec ttm ext4 crc32c_generic crc32c_intel crc16 mbcache jbd2
[   15.908531] i915 0000:00:02.0: [drm] Selective fetch area calculation failed in pipe A
[   16.033609] mei_hdcp 0000:00:16.0-b638ab7e-94e2-4ea2-a552-d1c54b627f04: bound 0000:00:02.0 (ops i915_hdcp_component_ops [i915])
[   16.059241] mei_pxp 0000:00:16.0-fbf6fcf1-96cf-4e2e-a6a6-1bab8cbe36b1: bound 0000:00:02.0 (ops i915_pxp_tee_component_ops [i915])
[   16.353601] sof-audio-pci-intel-tgl 0000:00:1f.3: bound 0000:00:02.0 (ops i915_audio_component_bind_ops [i915])
[  616.158827] i915 0000:00:02.0: driver does not support SR-IOV configuration via sysfs

I also made sure my laptop GPU supports SR-IOV to begin with,

lspci -v
00:02.0 VGA compatible controller: Intel Corporation TigerLake-LP GT2 [Iris Xe Graphics] (rev 01) (prog-if 00 [VGA controller])
	DeviceName: Onboard - Video
	Subsystem: Dell Device 0991
	Flags: bus master, fast devsel, latency 0, IRQ 128, IOMMU group 1
	Memory at 6052000000 (64-bit, non-prefetchable) [size=16M]
	Memory at 4000000000 (64-bit, prefetchable) [size=256M]
	I/O ports at 3000 [size=64]
	Expansion ROM at 000c0000 [virtual] [disabled] [size=128K]
	Capabilities: [40] Vendor Specific Information: Len=0c <?>
	Capabilities: [70] Express Root Complex Integrated Endpoint, MSI 00
	Capabilities: [ac] MSI: Enable+ Count=1/1 Maskable+ 64bit-
	Capabilities: [d0] Power Management version 2
	Capabilities: [100] Process Address Space ID (PASID)
	Capabilities: [200] Address Translation Service (ATS)
	Capabilities: [300] Page Request Interface (PRI)
	Capabilities: [320] Single Root I/O Virtualization (SR-IOV)
	Kernel driver in use: i915
	Kernel modules: i915

I do have the i915 module early loaded in my /etc/mkinitcpio.conf

MODULES=(ext4 i915)

I'm afraid to blacklist the i915 because modinfo is saying that it has the dkms version loaded, but the modinfo also doesn't show an option for 7 listed for enable_guc and even 4 which is listed gives the same error:
Incompatible option enable_guc=4 - undocumented flag
My next step will be to to regenerate first if that works, then remove i915 from the MODULES section and regenerate the initramfs, maybe it's loading the original i915 because I haven't regenerated initramfs since installing the dkms module.
Googling hasn't helped much either since I can hardly find anyone wanting to use a dkms version of module over an original one, and in i915's case, I'm fairly certain it's included with the Arch Linux mesa package which means I can't just uninstall mesa since so many other packages depend on it.

xTechon · 2022-10-06T17:23:36Z

Solved, if i915 is in the Modules section in /etc/mkinitcpio.conf, you have to regenerate the initramfs

Alion548 · 2022-10-07T05:52:51Z

I add the following process:

kdms install
dracut -f /boot/initramfs-5.19.14-300.fc37.x86_64.img $(uname -r)
lsinitrd -k $(uname -r)
grub2-mkconfig
Where the second step img address is modified according to your actual one.
SR-IOV enabled successfully, but the VM iGPU reports an error (windows 10 21H2)

Fix NULL pointer dereference error in wa_list_apply

Add doc to set compile flags for Ubuntu and Debian

Alion548 closed this as completed Sep 27, 2022

vvhh2002 mentioned this issue Sep 29, 2022

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sieskei referenced this issue May 3, 2023

Merge pull request #73 from zhtengw/master

4e7ef58

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sshaikh mentioned this issue Jun 2, 2024

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9700664

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SR-IOV cannot be turned on. #1

SR-IOV cannot be turned on. #1

Alion548 commented Sep 27, 2022 •

edited

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strongtz commented Sep 27, 2022

Alion548 commented Sep 27, 2022

xTechon commented Oct 6, 2022

xTechon commented Oct 6, 2022

Alion548 commented Oct 7, 2022

SR-IOV cannot be turned on. #1

SR-IOV cannot be turned on. #1

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Alion548 commented Sep 27, 2022 • edited Loading

strongtz commented Sep 27, 2022

Alion548 commented Sep 27, 2022

xTechon commented Oct 6, 2022

xTechon commented Oct 6, 2022

Alion548 commented Oct 7, 2022

Alion548 commented Sep 27, 2022 •

edited

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