root@pve:~# cat /etc/modules-load.d/modules.conf
# /etc/modules: kernel modules to load at boot time.
#
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.
kvmgt
vfio_pci
vfio_virqfd
vfio
vfio_iommu_type1
vfio-mdev
i915



root@pve:~# cat /etc/default/grub
# If you change this file, run 'update-grub' afterwards to update
# /boot/grub/grub.cfg.
# For full documentation of the options in this file, see:
#   info -f grub -n 'Simple configuration'

GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet i915.enable_gvt=1 intel_iommu=on"
GRUB_CMDLINE_LINUX=""

# Uncomment to enable BadRAM filtering, modify to suit your needs
# This works with Linux (no patch required) and with any kernel that obtains
# the memory map information from GRUB (GNU Mach, kernel of FreeBSD ...)
#GRUB_BADRAM="0x01234567,0xfefefefe,0x89abcdef,0xefefefef"

# Uncomment to disable graphical terminal (grub-pc only)
#GRUB_TERMINAL=console

# The resolution used on graphical terminal
# note that you can use only modes which your graphic card supports via VBE
# you can see them in real GRUB with the command `vbeinfo'
#GRUB_GFXMODE=640x480

# Uncomment if you don't want GRUB to pass "root=UUID=xxx" parameter to Linux
#GRUB_DISABLE_LINUX_UUID=true

# Uncomment to disable generation of recovery mode menu entries
#GRUB_DISABLE_RECOVERY="true"

# Uncomment to get a beep at grub start
#GRUB_INIT_TUNE="480 440 1"
root@pve:~#


root@pve:~# dmesg | grep IOMMU
[    0.169926] DMAR: IOMMU enabled
[    0.421692] DMAR-IR: IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 1
[    0.822256] DMAR: IOMMU feature fl1gp_support inconsistent
[    0.822258] DMAR: IOMMU feature pgsel_inv inconsistent
[    0.822259] DMAR: IOMMU feature nwfs inconsistent
[    0.822261] DMAR: IOMMU feature pasid inconsistent
[    0.822262] DMAR: IOMMU feature eafs inconsistent
[    0.822263] DMAR: IOMMU feature prs inconsistent
[    0.822264] DMAR: IOMMU feature nest inconsistent
[    0.822265] DMAR: IOMMU feature mts inconsistent
[    0.822266] DMAR: IOMMU feature sc_support inconsistent
[    0.822267] DMAR: IOMMU feature dev_iotlb_support inconsistent
root@pve:~#

root@pve:~# dmesg | grep DMAR
[    0.022041] ACPI: DMAR 0x000000006F022000 0000A8 (v01 INTEL  NUC9i5FN 00000037      01000013)
[    0.022099] ACPI: Reserving DMAR table memory at [mem 0x6f022000-0x6f0220a7]
[    0.169926] DMAR: IOMMU enabled
[    0.421661] DMAR: Host address width 39
[    0.421663] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
[    0.421672] DMAR: dmar0: reg_base_addr fed90000 ver 1:0 cap 1c0000c40660462 ecap 19e2ff0505e
[    0.421677] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
[    0.421682] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap d2008c40660462 ecap f050da
[    0.421686] DMAR: RMRR base: 0x0000006f4f4000 end: 0x0000006f73dfff
[    0.421689] DMAR: RMRR base: 0x00000078800000 end: 0x0000007cffffff
[    0.421692] DMAR-IR: IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 1
[    0.421694] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
[    0.421696] DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping.
[    0.424172] DMAR-IR: Enabled IRQ remapping in x2apic mode
[    0.822252] DMAR: No ATSR found
[    0.822254] DMAR: No SATC found
[    0.822256] DMAR: IOMMU feature fl1gp_support inconsistent
[    0.822258] DMAR: IOMMU feature pgsel_inv inconsistent
[    0.822259] DMAR: IOMMU feature nwfs inconsistent
[    0.822261] DMAR: IOMMU feature pasid inconsistent
[    0.822262] DMAR: IOMMU feature eafs inconsistent
[    0.822263] DMAR: IOMMU feature prs inconsistent
[    0.822264] DMAR: IOMMU feature nest inconsistent
[    0.822265] DMAR: IOMMU feature mts inconsistent
[    0.822266] DMAR: IOMMU feature sc_support inconsistent
[    0.822267] DMAR: IOMMU feature dev_iotlb_support inconsistent
[    0.822269] DMAR: dmar0: Using Queued invalidation
[    0.822274] DMAR: dmar1: Using Queued invalidation
[    0.825576] DMAR: Intel(R) Virtualization Technology for Directed I/O

root@pve:~# lspci
00:00.0 Host bridge: Intel Corporation Comet Lake-U v1 4c Host Bridge/DRAM Controller (rev 0c)
00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02)
00:08.0 System peripheral: Intel Corporation Xeon E3-1200 v5/v6 / E3-1500 v5 / 6th/7th/8th Gen Core Processor Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Comet Lake Thermal Subsytem
00:14.0 USB controller: Intel Corporation Comet Lake PCH-LP USB 3.1 xHCI Host Controller
00:14.2 RAM memory: Intel Corporation Comet Lake PCH-LP Shared SRAM
00:14.3 Network controller: Intel Corporation Comet Lake PCH-LP CNVi WiFi
00:15.0 Serial bus controller [0c80]: Intel Corporation Serial IO I2C Host Controller
00:15.2 Serial bus controller [0c80]: Intel Corporation Device 02ea
00:16.0 Communication controller: Intel Corporation Comet Lake Management Engine Interface
00:17.0 SATA controller: Intel Corporation Comet Lake SATA AHCI Controller
00:1c.0 PCI bridge: Intel Corporation Device 02bc (rev f0)
00:1d.0 PCI bridge: Intel Corporation Device 02b0 (rev f0)
00:1d.5 PCI bridge: Intel Corporation Device 02b5 (rev f0)
00:1f.0 ISA bridge: Intel Corporation Comet Lake PCH-LP LPC Premium Controller/eSPI Controller
00:1f.4 SMBus: Intel Corporation Comet Lake PCH-LP SMBus Host Controller
00:1f.5 Serial bus controller [0c80]: Intel Corporation Comet Lake SPI (flash) Controller
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (10) I219-V
01:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
02:00.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
02:01.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
02:02.0 PCI bridge: Intel Corporation JHL7540 Thunderbolt 3 Bridge [Titan Ridge 2C 2018] (rev 06)
03:00.0 System peripheral: Intel Corporation JHL7540 Thunderbolt 3 NHI [Titan Ridge 2C 2018] (rev 06)
39:00.0 USB controller: Intel Corporation JHL7540 Thunderbolt 3 USB Controller [Titan Ridge 2C 2018] (rev 06)
3a:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
3b:00.0 SD Host controller: Genesys Logic, Inc Device 9755

00:02.0 VGA compatible controller: Intel Corporation CometLake-U GT2 [UHD Graphics] (rev 02) (prog-if 00 [VGA controller])
        DeviceName:  GPU
        Subsystem: Intel Corporation UHD Graphics
        Flags: bus master, fast devsel, latency 0, IRQ 158, IOMMU group 1
        Memory at 6022000000 (64-bit, non-prefetchable) [size=16M]
        Memory at 4000000000 (64-bit, prefetchable) [size=2G]
        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)
        Kernel driver in use: i915
        Kernel modules: i915