Re: [vfio-users] tiger lake Iris Xe single GPU passthrough

2022-01-19 Thread Arthur Rasmusson 
QEMU won’t need changes to support SR-IOV on Intel Xe GPUs I don’t think. I 
won’t speak for Intel’s great GPU team but exciting things are soon at hand. We 
still need the SR-IOV-Enabling.patch. Ping the Intel-GFX mailing list for that. 
:)

Arthur Rasmusson
Arc Compute
https://LibVF.IO/



Regards,
Arthur Rasmusson.

COO, Arc Compute Ltd.
arccompute.com

Book a meeting with me:
calendly.com/arthur_r
On Jan 19, 2022, at 9:33 AM, boit sanssoif  wrote:


Hi vfio users and developpers,
I'm trying to GPU passthrough my core 
i5-1135G7
 (Iris Xe) using vfio ( QEMU version 6.0.0 kernel 5.11)

I used my laptop BIOS file from which I extracted the efi IntelGopDriver and 
vbt files (note that it seems to have two vbt in BIOS file), I used the same 
one I found in "/sys/kernel/debug/dri/0/i915_vbt", then I recompiled OVMF with 
this files using https://github.com/Kethen/edk2 project.

On my host I blacklisted i915 and related drivers, disable efi framebuffer and 
load vfio at boot. I didn't try the legacy way as the 11th intel generation no 
more support legacy boot.

Actually the linux guest run well as I can connect using serial or ssh but it 
does not use screen (a "black light" change at VM boot).

I can see this error messages

pci :06:02.0: can't claim BAR 6 [mem 0x8000-0x pref]: no 
compatible bridge window
i915 :06:02.0: [drm] Failed to find VBIOS tables (VBT)
i915 :06:02.0: [drm] ERROR CPU pipe A FIFO underrun

from dmesg | grep "06:02"
[0.210469] pci :06:02.0: [8086:9a49] type 00 class 0x03
[0.215803] pci :06:02.0: reg 0x10: [mem 0xc000-0xc0ff 64bit]
[0.219769] pci :06:02.0: reg 0x18: [mem 0x8-0x80fff 64bit 
pref]
[0.223748] pci :06:02.0: reg 0x20: [io  0x9080-0x90bf]
[0.231948] pci :06:02.0: reg 0x30: [mem 0x8000-0x pref]
[0.231971] pci :06:02.0: DMAR: Skip IOMMU disabling for graphics
[0.268735] pci :06:02.0: vgaarb: VGA device added: 
decodes=io+mem,owns=none,locks=none
[0.268735] pci :06:02.0: vgaarb: bridge control possible
[0.268735] pci :06:02.0: vgaarb: setting as boot device (VGA legacy 
resources not available)
[0.356441] pci :06:02.0: can't claim BAR 6 [mem 0x8000-0x 
pref]: no compatible bridge window
[0.363647] pci :06:02.0: BAR 6: assigned [mem 0xc1008000-0xc100 
pref]
[1.940762] i915 :06:02.0: vgaarb: deactivate vga console
[2.022964] i915 :06:02.0: [drm] Failed to find VBIOS tables (VBT)
[2.023670] i915 :06:02.0: vgaarb: changed VGA decodes: 
olddecodes=io+mem,decodes=io+mem:owns=none
[2.027066] i915 :06:02.0: [drm] Finished loading DMC firmware 
i915/tgl_dmc_ver2_08.bin (v2.8)
[2.392830] i915 :06:02.0: [drm] [ENCODER:307:DDI A/PHY A] is 
disabled/in DSI mode with an ungated DDI clock, gate it
[2.400635] [drm] Initialized i915 1.6.0 20201103 for :06:02.0 on minor 0
[2.410040] i915 :06:02.0: [drm] fb0: i915drmfb frame buffer device
[2.717431] i915 :06:02.0: [drm] *ERROR* CPU pipe A FIFO underrun

I'm not sure I well compiled OVMF using my Vbt.bin when I see this message 
"i915 :06:02.0: [drm] Failed to find VBIOS tables (VBT)"

I also wrote informations about my attempts here :
https://www.reddit.com/r/VFIO/comments/s726zt/tiger_lake_iris_xe_single_gpu_passthrough/

Will vfio support Iris Xe passthrough as Intel seems to support SR-IOV in their 
newer GPU and
does qemu need to receive changes to support this use case ?

Thanks for your time and all the wonderful work you have already done on VFIO !
___
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[vfio-users] tiger lake Iris Xe single GPU passthrough

2022-01-19 Thread boit sanssoif 
Hi vfio users and developpers,
I'm trying to GPU passthrough my core i5-1135G7

(Iris Xe) using vfio ( QEMU version 6.0.0 kernel 5.11)

I used my laptop BIOS file from which I extracted the efi IntelGopDriver
and vbt files (note that it seems to have two vbt in BIOS file), I used the
same one I found in "/sys/kernel/debug/dri/0/i915_vbt", then I recompiled
OVMF with this files using https://github.com/Kethen/edk2 project.

On my host I blacklisted i915 and related drivers, disable efi framebuffer
and load vfio at boot. I didn't try the legacy way as the 11th intel
generation no more support legacy boot.

Actually the linux guest run well as I can connect using serial or ssh but
it does not use screen (a "black light" change at VM boot).

I can see this error messages

pci :06:02.0: can't claim BAR 6 [mem 0x8000-0x pref]:
no compatible bridge window
i915 :06:02.0: [drm] Failed to find VBIOS tables (VBT)
i915 :06:02.0: [drm] ERROR CPU pipe A FIFO underrun

from dmesg | grep "06:02"
[0.210469] pci :06:02.0: [8086:9a49] type 00 class 0x03
[0.215803] pci :06:02.0: reg 0x10: [mem 0xc000-0xc0ff 64bit]
[0.219769] pci :06:02.0: reg 0x18: [mem
0x8-0x80fff 64bit pref]
[0.223748] pci :06:02.0: reg 0x20: [io  0x9080-0x90bf]
[0.231948] pci :06:02.0: reg 0x30: [mem 0x8000-0x pref]
[0.231971] pci :06:02.0: DMAR: Skip IOMMU disabling for graphics
[0.268735] pci :06:02.0: vgaarb: VGA device added:
decodes=io+mem,owns=none,locks=none
[0.268735] pci :06:02.0: vgaarb: bridge control possible
[0.268735] pci :06:02.0: vgaarb: setting as boot device (VGA
legacy resources not available)
[0.356441] pci :06:02.0: can't claim BAR 6 [mem
0x8000-0x pref]: no compatible bridge window
[0.363647] pci :06:02.0: BAR 6: assigned [mem
0xc1008000-0xc100 pref]
[1.940762] i915 :06:02.0: vgaarb: deactivate vga console
[2.022964] i915 :06:02.0: [drm] Failed to find VBIOS tables (VBT)
[2.023670] i915 :06:02.0: vgaarb: changed VGA decodes:
olddecodes=io+mem,decodes=io+mem:owns=none
[2.027066] i915 :06:02.0: [drm] Finished loading DMC firmware
i915/tgl_dmc_ver2_08.bin (v2.8)
[2.392830] i915 :06:02.0: [drm] [ENCODER:307:DDI A/PHY A] is
disabled/in DSI mode with an ungated DDI clock, gate it
[2.400635] [drm] Initialized i915 1.6.0 20201103 for :06:02.0 on minor 0
[2.410040] i915 :06:02.0: [drm] fb0: i915drmfb frame buffer device
[2.717431] i915 :06:02.0: [drm] *ERROR* CPU pipe A FIFO underrun


I'm not sure I well compiled OVMF using my Vbt.bin when I see this message
"i915 :06:02.0: [drm] Failed to find VBIOS tables (VBT)"

I also wrote informations about my attempts here :
https://www.reddit.com/r/VFIO/comments/s726zt/tiger_lake_iris_xe_single_gpu_passthrough/

Will vfio support Iris Xe passthrough as Intel seems to support SR-IOV in
their newer GPU and
does qemu need to receive changes to support this use case ?

Thanks for your time and all the wonderful work you have already done on
VFIO !
___
vfio-users mailing list
vfio-users@redhat.com
https://listman.redhat.com/mailman/listinfo/vfio-users