KVM : GPU Passthrough2024/05/10 |
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Configure GPU Passthrough for Virtual Machines. By this configuration, it's possible to use GPU on Virtual Machines and run GPU Computing. Before configuration, Enable VT-d (Intel) or AMD IOMMU (AMD) on BIOS Setting first. |
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| [1] | Enable IOMMU feature on KVM Host. |
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# show PCI identification number and [vendor-ID:device-ID] of Graphic card # PCI number ⇒ it matches [01:00.*] below # vendor-ID:device-ID ⇒ it matches [10de:***] below root@dlp:~# lspci -nn | grep -i nvidia 81:00.0 VGA compatible controller [0300]: NVIDIA Corporation GA104 [GeForce RTX 3060] [10de:2487] (rev a1) 81:00.1 Audio device [0403]: NVIDIA Corporation GA104 High Definition Audio Controller [10de:228b] (rev a1)
root@dlp:~#
vi /etc/default/grub # line 11 : add # for AMD CPU, set [amd_iommu=on] # for Intel CPU, set [intel_iommu=on] # for [vfio-pci.ids==***], set [vendor-ID:device-ID] GRUB_CMDLINE_LINUX=" intel_iommu=on iommu=pt vfio-pci.ids=10de:2487,10de:228b "
root@dlp:~#
update-grub # confirm IOMMU is enabled root@dlp:~# dmesg | grep -E "DMAR|IOMMU" [ 0.010922] ACPI: DMAR 0x000000007A5C3130 000108 (v01 ALASKA A M I 00000001 INTL 20091013) [ 0.010958] ACPI: Reserving DMAR table memory at [mem 0x7a5c3130-0x7a5c3237] [ 0.401716] DMAR: IOMMU enabled [ 0.916024] DMAR: Host address width 46 [ 0.916026] DMAR: DRHD base: 0x000000fbffc000 flags: 0x0 [ 0.916041] DMAR: dmar0: reg_base_addr fbffc000 ver 1:0 cap d2078c106f0466 ecap f020df [ 0.916046] DMAR: DRHD base: 0x000000c7ffc000 flags: 0x1 [ 0.916052] DMAR: dmar1: reg_base_addr c7ffc000 ver 1:0 cap d2078c106f0466 ecap f020df [ 0.916056] DMAR: RMRR base: 0x0000007dbcf000 end: 0x0000007dbddfff [ 0.916060] DMAR: ATSR flags: 0x0 [ 0.916064] DMAR: RHSA base: 0x000000c7ffc000 proximity domain: 0x0 [ 0.916067] DMAR: RHSA base: 0x000000fbffc000 proximity domain: 0x1 [ 0.916072] DMAR-IR: IOAPIC id 10 under DRHD base 0xfbffc000 IOMMU 0 [ 0.916076] DMAR-IR: IOAPIC id 8 under DRHD base 0xc7ffc000 IOMMU 1 [ 0.916079] DMAR-IR: IOAPIC id 9 under DRHD base 0xc7ffc000 IOMMU 1 [ 0.916082] DMAR-IR: HPET id 0 under DRHD base 0xc7ffc000 [ 0.916085] DMAR-IR: x2apic is disabled because BIOS sets x2apic opt out bit. [ 0.916086] DMAR-IR: Use 'intremap=no_x2apic_optout' to override the BIOS setting. [ 0.916979] DMAR-IR: Enabled IRQ remapping in xapic mode [ 1.299542] DMAR: No SATC found [ 1.299546] DMAR: dmar0: Using Queued invalidation [ 1.299553] DMAR: dmar1: Using Queued invalidation [ 1.312667] DMAR: Intel(R) Virtualization Technology for Directed I/O # confirm vfio_pci is enabled root@dlp:~# dmesg | grep -i vfio [ 0.000000] Command line: BOOT_IMAGE=/vmlinuz-6.8.0-31-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro intel_iommu=on iommu=pt vfio-pci.ids=10de:2487,10de:228b [ 0.395931] Kernel command line: BOOT_IMAGE=/vmlinuz-6.8.0-31-generic root=/dev/mapper/ubuntu--vg-ubuntu--lv ro intel_iommu=on iommu=pt vfio-pci.ids=10de:2487,10de:228b [ 4.612664] VFIO - User Level meta-driver version: 0.3 [ 4.625530] vfio-pci 0000:81:00.0: vgaarb: VGA decodes changed: olddecodes=io+mem,decodes=io+mem:owns=none [ 4.625878] vfio_pci: add [10de:2487[ffffffff:ffffffff]] class 0x000000/00000000 [ 4.650349] vfio_pci: add [10de:228b[ffffffff:ffffffff]] class 0x000000/00000000 |
| [2] | That's OK. For example, create Ubuntu 24.04 Virtual machine with GPU. Specify PCI identification number of GPU for [--host-device]. |
root@dlp:~# virt-install \
--name ubuntu2404 \
--ram 8192 \
--disk path=/var/kvm/images/ubuntu2404.img,size=30 \
--vcpus 4 \
--os-variant ubuntu24.04 \
--network bridge=br0 \
--graphics vnc,listen=0.0.0.0,password=password \
--video vga \
--console pty,target_type=serial \
--location /home/ubuntu-24.04-live-server-amd64.iso,kernel=casper/vmlinuz,initrd=casper/initrd \
--extra-args 'console=ttyS0,115200n8' \
--host-device 81:00.0 \
--features kvm_hidden=on \
--machine q35
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| [3] | After creating Virtual machine, Confirm GPU is found on it like follows. |
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ubuntu@ubuntu:~$ lspci | grep -i nvidia 05:00.0 VGA compatible controller: NVIDIA Corporation GA104 [GeForce RTX 3060] (rev a1) |
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