Intel xeon graphic passthrough / Dmar error

D

Dark26

Renowned Member
Nov 27, 2017
273
25
68
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Bonjour,

I try to passthrough the integrated graphic card to a vm. it's seem to work but in the hosts a lots of message like this :

Code: 
[ 1706.810030] dmar_fault: 890 callbacks suppressed
[ 1706.810031] DMAR: DRHD: handling fault status reg 3
[ 1706.810162] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 71e306b000 [fault reason 06] PTE Read access is not set
[ 1706.826660] DMAR: DRHD: handling fault status reg 3
[ 1706.826718] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 71e306b000 [fault reason 06] PTE Read access is not set
[ 1706.843325] DMAR: DRHD: handling fault status reg 3
[ 1706.843378] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 71e306b000 [fault reason 06] PTE Read access is not set
[ 1706.860004] DMAR: DRHD: handling fault status reg 3
[ 1711.826698] dmar_fault: 899 callbacks suppressed
[ 1711.826699] DMAR: DRHD: handling fault status reg 3
[ 1711.826851] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 240366b000 [fault reason 06] PTE Read access is not set
[ 1711.843361] DMAR: DRHD: handling fault status reg 3
[ 1711.843438] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 240366b000 [fault reason 06] PTE Read access is not set
[ 1711.860034] DMAR: DRHD: handling fault status reg 3
[ 1711.860099] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 71e306b000 [fault reason 06] PTE Read access is not set
[ 1711.876689] DMAR: DRHD: handling fault status reg 3
[ 1716.843362] dmar_fault: 896 callbacks suppressed
[ 1716.843364] DMAR: DRHD: handling fault status reg 3
[ 1716.843497] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr a03444000 [fault reason 06] PTE Read access is not set
[ 1716.860030] DMAR: DRHD: handling fault status reg 3
[ 1716.860096] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr a03444000 [fault reason 06] PTE Read access is not set
[ 1716.876695] DMAR: DRHD: handling fault status reg 3
[ 1716.876761] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr a03444000 [fault reason 06] PTE Read access is not set
[ 1716.893336] DMAR: DRHD: handling fault status reg 3
[ 1721.860042] dmar_fault: 896 callbacks suppressed
[ 1721.860043] DMAR: DRHD: handling fault status reg 3
[ 1721.860138] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr a03444000 [fault reason 06] PTE Read access is not set
[ 1721.876699] DMAR: DRHD: handling fault status reg 3
[ 1721.876747] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 240366b000 [fault reason 06] PTE Read access is not set
[ 1721.893362] DMAR: DRHD: handling fault status reg 3
[ 1721.893421] DMAR: [DMA Read] Request device [00:02.0] PASID ffffffff fault addr 240366b000 [fault reason 06] PTE Read access is not set
[ 1721.910035] DMAR: DRHD: handling fault status reg 3

i see a lot of solution that says to put
intel_iommu=igfx_off
But of course no gpu with this option enable.

any idea ?

Code: 
#scsi1%3A Data%3A109/vm-109-disk-1.raw,backup=0,size=8G
agent: 1
balloon: 0
bootdisk: scsi0
cores: 5
cpu: host
hostpci0: 00:02,pcie=1
hostpci1: 00:1b,pcie=1
ide2: none,media=cdrom
machine: q35
memory: 10000
name: mintwater
net0: virtio=7E:22:6F:B0:9A:50,bridge=vmbr1,firewall=1
numa: 0
onboot: 1
ostype: l26
runningmachine: pc-q35-4.1+pve0
scsi0: RAID1SSD:109/vm-109-disk-0.qcow2,size=11G
scsihw: virtio-scsi-pci
smbios1: uuid=5befc1eb-da29-4294-8b71-de27be9508bd
sockets: 1
startup: order=1
usb0: host=04d9:a0cd
usb1: host=046d:c52b
usb2: host=1050:0120
vga: none
vmgenid: ebad8942-2dbf-4a97-8bae-2f608275a8ad

Code: 
root@xeon:~# for a in /sys/kernel/iommu_groups/*; do find $a -type l; done | sort
/sys/kernel/iommu_groups/0/devices/0000:00:00.0
/sys/kernel/iommu_groups/10/devices/0000:00:1c.3
/sys/kernel/iommu_groups/11/devices/0000:00:1d.0
/sys/kernel/iommu_groups/12/devices/0000:00:1f.0
/sys/kernel/iommu_groups/12/devices/0000:00:1f.2
/sys/kernel/iommu_groups/12/devices/0000:00:1f.3
/sys/kernel/iommu_groups/13/devices/0000:04:00.0
/sys/kernel/iommu_groups/14/devices/0000:05:00.0
/sys/kernel/iommu_groups/1/devices/0000:00:01.0
/sys/kernel/iommu_groups/1/devices/0000:00:01.1
/sys/kernel/iommu_groups/1/devices/0000:01:00.0
/sys/kernel/iommu_groups/1/devices/0000:02:00.0
/sys/kernel/iommu_groups/1/devices/0000:02:00.1
/sys/kernel/iommu_groups/2/devices/0000:00:02.0
/sys/kernel/iommu_groups/3/devices/0000:00:03.0
/sys/kernel/iommu_groups/4/devices/0000:00:14.0
/sys/kernel/iommu_groups/5/devices/0000:00:16.0
/sys/kernel/iommu_groups/6/devices/0000:00:1a.0
/sys/kernel/iommu_groups/7/devices/0000:00:1b.0
/sys/kernel/iommu_groups/8/devices/0000:00:1c.0
/sys/kernel/iommu_groups/9/devices/0000:00:1c.2

Code: 
root@xeon:~# lspci
00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3 Processor DRAM Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller (rev 06)
00:01.1 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x8 Controller (rev 06)
00:02.0 Display controller: Intel Corporation Xeon E3-1200 v3 Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 9 Series Chipset Family USB xHCI Controller
00:16.0 Communication controller: Intel Corporation 9 Series Chipset Family ME Interface #1
00:1a.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #2
00:1b.0 Audio device: Intel Corporation 9 Series Chipset Family HD Audio Controller
00:1c.0 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 1 (rev d0)
00:1c.2 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 3 (rev d0)
00:1c.3 PCI bridge: Intel Corporation 9 Series Chipset Family PCI Express Root Port 4 (rev d0)
00:1d.0 USB controller: Intel Corporation 9 Series Chipset Family USB EHCI Controller #1
00:1f.0 ISA bridge: Intel Corporation 9 Series Chipset Family Z97 LPC Controller
00:1f.2 SATA controller: Intel Corporation 9 Series Chipset Family SATA Controller [AHCI Mode]
00:1f.3 SMBus: Intel Corporation 9 Series Chipset Family SMBus Controller
01:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) (rev 06)
02:00.0 VGA compatible controller: NVIDIA Corporation GT218 [GeForce 210] (rev a2)
02:00.1 Audio device: NVIDIA Corporation High Definition Audio Controller (rev a1)
04:00.0 Ethernet controller: Qualcomm Atheros Killer E220x Gigabit Ethernet Controller (rev 10)
05:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet Controller (Copper) (rev 06)
 
Passing through an iGPU is always a bit tricky and heavily dependent on both hardware and software (including BIOS) support.

What kernel commandline do you currently use? Have you tried appending 'iommu=pt'? (i.e. both 'intel_iommu=on' and 'iommu=pt', you can verify the currently booted version in '/proc/cmdline').

Also, a bit of generic advice, make sure your system is up to date and check with your mainboard manufacturer for potential BIOS updates.
 
thanks

now i have this :
Code: 
root@xeon:/# cat /proc/cmdline
BOOT_IMAGE=/boot/vmlinuz-5.4.27-1-pve root=/dev/mapper/SSD-proxmox_xeon_root ro intel_iommu=on acpi_sleep=nonvc

but yesterday t try with with iommu=pt ; and no luck.

But for some reason yesterday after many test, testing a bit of everything ( bios options csm, size video memory... ); and some kernel options; try also with 440 fx for the vm , no more erreur. I was happy. But today, after the poweroff and the power on the same error :mad:
 
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