GPU 直通问题，找不到 IOMMU 组

问题描述

正如标题所提到的，

我的 bord 规格如下： Intel(R) Xeon(R) E-2288G CPU @ 3.70GHz

00:00.0 Host bridge: Intel Corporation Device 3e31 (rev 0d)
00:01.0 PCI bridge: Intel Corporation Skylake PCIe Controller (x16) (rev 0d)
00:01.1 PCI bridge: Intel Corporation Skylake PCIe Controller (x8) (rev 0d)
00:08.0 System peripheral: Intel Corporation Skylake Gaussian Mixture Model
00:12.0 Signal processing controller: Intel Corporation Cannon Lake PCH Thermal Controller (rev 10)
00:14.0 USB controller: Intel Corporation Cannon Lake PCH USB 3.1 xHCI Host Controller (rev 10)
00:14.2 RAM memory: Intel Corporation Cannon Lake PCH Shared SRAM (rev 10)
00:15.0 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller (rev 10)
00:15.1 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH Serial IO I2C Controller (rev 10)
00:16.0 Communication controller: Intel Corporation Cannon Lake PCH HECI Controller (rev 10)
00:17.0 SATA controller: Intel Corporation Cannon Lake PCH SATA AHCI Controller (rev 10)
00:1c.0 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port (rev f0)
00:1c.5 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port (rev f0)
00:1c.7 PCI bridge: Intel Corporation Cannon Lake PCH PCI Express Root Port (rev f0)
00:1e.0 Communication controller: Intel Corporation Device a328 (rev 10)
00:1f.0 ISA bridge: Intel Corporation Device a309 (rev 10)
00:1f.3 Audio device: Intel Corporation Cannon Lake PCH cAVS (rev 10)
00:1f.4 SMBus: Intel Corporation Cannon Lake PCH SMBus Controller (rev 10)
00:1f.5 Serial bus controller [0c80]: Intel Corporation Cannon Lake PCH SPI Controller (rev 10)
00:1f.6 Ethernet controller: Intel Corporation Ethernet Connection (7) I219-LM (rev 10)
01:00.0 VGA compatible controller: NVIDIA Corporation TU102GL [Quadro RTX 6000/8000] (rev a1)
01:00.1 Audio device: NVIDIA Corporation TU102 High Definition Audio Controller (rev a1)
01:00.2 USB controller: NVIDIA Corporation TU102 USB 3.1 Controller (rev a1)
01:00.3 Serial bus controller [0c80]: NVIDIA Corporation TU102 UCSI Controller (rev a1)
02:00.0 Ethernet controller: Mellanox Technologies MT28841
02:00.1 Ethernet controller: Mellanox Technologies MT28841
04:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network Connection (rev 03)
05:00.0 PCI bridge: Tundra Semiconductor Corp. Device 8113 (rev 01)

已设置 GRUB_CMDLINE_LINUX_DEFAULT="quiet splash intel_iommu=on iommu=pt pcie_acs_override=downstream" 并重启

还要确保启用了 Vt-d，DMAR-IR：在 x2apic 模式下启用 IRQ 重新映射

然后

dmesg | grep IOMMU

得到

DMAR-IR: IOAPIC id 2 under DRHD base  0xfed91000 IOMMU 0

和

find /sys/kernel/iommu_groups/ -type l

没有显示

如果有人对此类问题有任何想法，请与我分享。赞赏！

解决方法

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