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## 1.修改系统Grub参数
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使用 SSH 工具登录到 PVE 服务器,编辑系统 Grub 的配置文件 `/etc/default/grub` :
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```bash
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## 编辑 Grub 配置文件
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nano /etc/default/grub
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```
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在 `nano` 编辑器对话框中修改 `GRUB_CMDLINE_LINUX_DEFAULT` 参数,注意命令中间的空格:
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```bash
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## Intel 处理器添加参数
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GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on"
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```
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根据官方文档的说明,AMD 处理器下硬件直通功能将会自动打开,否则需要手动修改 Grub 配置文件:
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```bash
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## AMD 处理器添加参数
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GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on"
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```
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修改并保存后,需要更新系统 Grub :
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```bash
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## 更新系统 Grub
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update-grub
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```
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## 2.加载系统内核模块
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修改系统 `/etc/modules` 配置文件,增加必要的系统模块:
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```bash
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## 编辑系统配置文件
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nano /etc/modules
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```
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在配置文件末尾输入以下内容:
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```txt
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vfio
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vfio_iommu_type1
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vfio_pci
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vfio_virqfd
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```
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将配置文件保存,并重启 PVE 服务器。
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PVE 服务器重启完成后,再次使用 SSH 工具登录,并使用以下命令检查硬件直通状态:
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```bash
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## 检查系统硬件直通状态
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dmesg | grep -e DMAR -e IOMMU -e AMD-Vi
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```
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检查 `IOMMU` 、 `Directed I/O` 或 `Interrupt Remapping` 的启用状态。
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N5105 处理器示例输出如下:
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```txt
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[ 0.016437] ACPI: DMAR 0x00000000787BF000 000088 (v02 INTEL EDK2 00000002 01000013)
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[ 0.016472] ACPI: Reserving DMAR table memory at [mem 0x787bf000-0x787bf087]
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[ 0.052437] DMAR: IOMMU enabled
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[ 0.144431] DMAR: Host address width 39
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[ 0.144432] DMAR: DRHD base: 0x000000fed90000 flags: 0x0
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[ 0.144439] DMAR: dmar0: reg_base_addr fed90000 ver 4:0 cap 1c0000c40660462 ecap 49e2ff0505e
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[ 0.144441] DMAR: DRHD base: 0x000000fed91000 flags: 0x1
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[ 0.144446] DMAR: dmar1: reg_base_addr fed91000 ver 1:0 cap d2008c40660462 ecap f050da
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[ 0.144449] DMAR: RMRR base: 0x0000007b800000 end: 0x0000007fbfffff
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[ 0.144452] DMAR-IR: IOAPIC id 2 under DRHD base 0xfed91000 IOMMU 1
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[ 0.144453] DMAR-IR: HPET id 0 under DRHD base 0xfed91000
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[ 0.144454] DMAR-IR: Queued invalidation will be enabled to support x2apic and Intr-remapping.
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[ 0.146335] DMAR-IR: Enabled IRQ remapping in x2apic mode
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[ 0.333509] pci 0000:00:02.0: DMAR: Skip IOMMU disabling for graphics
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[ 0.410824] DMAR: No ATSR found
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[ 0.410824] DMAR: No SATC found
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[ 0.410826] DMAR: IOMMU feature fl1gp_support inconsistent
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[ 0.410827] DMAR: IOMMU feature pgsel_inv inconsistent
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[ 0.410829] DMAR: IOMMU feature nwfs inconsistent
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[ 0.410829] DMAR: IOMMU feature pds inconsistent
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[ 0.410830] DMAR: IOMMU feature eafs inconsistent
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[ 0.410831] DMAR: IOMMU feature prs inconsistent
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[ 0.410831] DMAR: IOMMU feature nest inconsistent
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[ 0.410832] DMAR: IOMMU feature mts inconsistent
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[ 0.410832] DMAR: IOMMU feature sc_support inconsistent
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[ 0.410833] DMAR: IOMMU feature dev_iotlb_support inconsistent
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[ 0.410835] DMAR: dmar0: Using Queued invalidation
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[ 0.410838] DMAR: dmar1: Using Queued invalidation
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[ 0.412755] DMAR: Intel(R) Virtualization Technology for Directed I/O
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```
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