I can’t even figure out how to tell if it’s supported or not. If it is supported, I can’t figure out how to enable it. If it is enabled, idk where I should be seeing it in proxmox!

Can anyone point me in the right direction?

  • wildbus8979English
    21·
    8 months ago

    The motherboard need to support IOMMU, not Vt-d

    • nemanin@lemmy.worldOPEnglish
      1·
      8 months ago

      Ok. So they are different?

      How do I tell which motherboards support IOMMU?

      I can’t find it as a filter or search option on any websites…?

      • wildbus8979English
        11·
        8 months ago

        Yes they are different. VT-d is purely a function of the CPU (passed the BIOS enabling option).

        First you will want to look at the output of acpidump | egrep "DMAR|IVRS", then you will also want to very that IOMMU groups don’t group your GFX with something that won’t be passed through using something like: https://gist.github.com/r15ch13/ba2d738985fce8990a4e9f32d07c6ada

          • wildbus8979English
            31·
            8 months ago

            Run those two commands in the command line, post the result here

            • nemanin@lemmy.worldOPEnglish
              1·
              7 months ago

              sorry this took so long… you know, life. trying that command altogether, I get this response: -bash: acpidump: command not found

              trying just egrep “DMAR|IVRS” (in case they are two commands) seems to hang the terminal session.

              I tried following a guide to enable PICe passthrough and get this. One important thing, there is no discrete GPU at the moment, I’m trying to pass through an HBA…

              root@prox:~# dmesg | grep -e IOMMU [ 0.100411] DMAR: IOMMU enabled [ 0.254862] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1 [ 0.629143] pci 0000:00:02.0: DMAR: Skip IOMMU disabling for graphics [ 0.713978] DMAR: IOMMU feature fl1gp_support inconsistent [ 0.713979] DMAR: IOMMU feature pgsel_inv inconsistent [ 0.713980] DMAR: IOMMU feature nwfs inconsistent [ 0.713981] DMAR: IOMMU feature dit inconsistent [ 0.713982] DMAR: IOMMU feature sc_support inconsistent [ 0.713983] DMAR: IOMMU feature dev_iotlb_support inconsistent

            • nemanin@lemmy.worldOPEnglish
              1·
              7 months ago

              This may also help, my HBA is there:

              root@prox:~# for d in /sys/kernel/iommu_groups//devices/; do n=${d#/iommu_groups/}; n=${n%%/}; printf 'IOMMU group %s ’ “$n”; lspci -nns "${d##/}"; done IOMMU group 0 00:02.0 VGA compatible controller [0300]: Intel Corporation Raptor Lake-S GT1 [UHD Graphics 770] [8086:a780] (rev 04)

              IOMMU group 10 00:1f.0 ISA bridge [0601]: Intel Corporation Z690 Chipset LPC/eSPI Controller [8086:7a84] (rev 11)

              IOMMU group 10 00:1f.3 Audio device [0403]: Intel Corporation Alder Lake-S HD Audio Controller [8086:7ad0] (rev 11)

              IOMMU group 10 00:1f.4 SMBus [0c05]: Intel Corporation Alder Lake-S PCH SMBus Controller [8086:7aa3] (rev 11)

              IOMMU group 10 00:1f.5 Serial bus controller [0c80]: Intel Corporation Alder Lake-S PCH SPI Controller [8086:7aa4] (rev 11)

              IOMMU group 10 00:1f.6 Ethernet controller [0200]: Intel Corporation Ethernet Connection (17) I219-V [8086:1a1d] (rev 11)

              IOMMU group 11 01:00.0 Non-Volatile memory controller [0108]: Sandisk Corp Western Digital WD Black SN850X NVMe SSD [15b7:5030] (rev 01)

              IOMMU group 12 02:00.0 Ethernet controller [0200]: Realtek Semiconductor Co., Ltd. RTL8125 2.5GbE Controller [10ec:8125] (rev 05)

              IOMMU group 13 03:00.0 Non-Volatile memory controller [0108]: Micron/Crucial Technology Device [c0a9:5415] (rev 01)

              IOMMU group 14 04:00.0 PCI bridge [0604]: PLX Technology, Inc. PEX 8724 24-Lane, 6-Port PCI Express Gen 3 (8 GT/s) Switch, 19 x 19mm FCBGA [10b5:8724] (rev ca)

              IOMMU group 15 05:00.0 PCI bridge [0604]: PLX Technology, Inc. PEX 8724 24-Lane, 6-Port PCI Express Gen 3 (8 GT/s) Switch, 19 x 19mm FCBGA [10b5:8724] (rev ca)

              IOMMU group 16 05:08.0 PCI bridge [0604]: PLX Technology, Inc. PEX 8724 24-Lane, 6-Port PCI Express Gen 3 (8 GT/s) Switch, 19 x 19mm FCBGA [10b5:8724] (rev ca)

              IOMMU group 17 05:09.0 PCI bridge [0604]: PLX Technology, Inc. PEX 8724 24-Lane, 6-Port PCI Express Gen 3 (8 GT/s) Switch, 19 x 19mm FCBGA [10b5:8724] (rev ca)

              **IOMMU group 18 06:00.0 Serial Attached SCSI controller [0107]: Broadcom / LSI SAS3008 PCI-Express Fusion-MPT SAS-3 [1000:0097] (rev 02)

              IOMMU group 19 08:00.0 Serial Attached SCSI controller [0107]: Broadcom / LSI SAS3008 PCI-Express Fusion-MPT SAS-3 [1000:0097] (rev 02)**

              IOMMU group 1 00:00.0 Host bridge [0600]: Intel Corporation Device [8086:a740] (rev 01)

              IOMMU group 2 00:14.0 USB controller [0c03]: Intel Corporation Alder Lake-S PCH USB 3.2 Gen 2x2 XHCI Controller [8086:7ae0] (rev 11)

              IOMMU group 2 00:14.2 RAM memory [0500]: Intel Corporation Alder Lake-S PCH Shared SRAM [8086:7aa7] (rev 11)

              IOMMU group 3 00:15.0 Serial bus controller [0c80]: Intel Corporation Alder Lake-S PCH Serial IO I2C Controller #0 [8086:7acc] (rev 11)

              IOMMU group 4 00:16.0 Communication controller [0780]: Intel Corporation Alder Lake-S PCH HECI Controller #1 [8086:7ae8] (rev 11)

              IOMMU group 5 00:17.0 SATA controller [0106]: Intel Corporation Alder Lake-S PCH SATA Controller [AHCI Mode] [8086:7ae2] (rev 11)

              IOMMU group 6 00:1a.0 PCI bridge [0604]: Intel Corporation Alder Lake-S PCH PCI Express Root Port #25 [8086:7ac8] (rev 11)

              IOMMU group 7 00:1c.0 PCI bridge [0604]: Intel Corporation Alder Lake-S PCH PCI Express Root Port #2 [8086:7ab9] (rev 11)

              IOMMU group 8 00:1c.4 PCI bridge [0604]: Intel Corporation Alder Lake-S PCH PCI Express Root Port #5 [8086:7abc] (rev 11)

              IOMMU group 9 00:1d.0 PCI bridge [0604]: Intel Corporation Alder Lake-S PCH PCI Express Root Port #9 [8086:7ab0] (rev 11)

              • wildbus8979English
                2·
                7 months ago

                You should be good to go. Make sure vfio is loaded in the modules-load.d

                vfio
vfio_iommu_type1
vfio_pci
vfio_virqfd

                Make sure the module options are set correctly and the kernel module is blacklisted in /etc/modprobe.d/vfio.conf

                options vfio-pci ids=1000:0097
blacklist MODULE_NAME

                Make sure.IOMMU is enabled in your kernel command line (ex via grub): intel_iommu=on iommu=pt

                This is probably not complete, but it should get you pretty far into allowing you to add the pci device in the hardware config of your vm

      • Possibly linux@lemmy.zipEnglish
        11·
        8 months ago

        Its your CPU and yes it does support it as all Intel CPUs made within the last few years have support.