disable iommu amd. 04, and for all three of them, when the IOMMU is turned on in the BIOS, the setup freezes somewhere along the way and the installation fails.Enable logging of machine checks left over from booting.GPU passthrough is a technology that allows the Linux kernel to directly present an internal PCI GPU to a virtual machine.AFAIK most motherboard manufacturers chose not to support AMD-Vi.2022-3-20 · Disabled by default on AMD Fam10h and older because some BIOS leave bogus ones.This issue was due to Windows server OS compatibility with the virtualization function, we suggest to disable the IOMMU .spicy and connect to localhost at 5900.This is not required but tends to be supported on hardware that also hosts an IOMMU.Having both iommu=pt (pass through mode) and iommu=soft (software mode) enabled at same time will cause a clash since.I suspect I can could disable onboard video and install a video card to make this problem go away, however laptop users don't have that option obviously.sudo bash -c 'echo GRUB_CMDLINE_LINUX="amd_iommu=off" >> /etc/default/grub'.BIOS UEFI Asus (blue) To get started, enable processor virtualization (Intel-VT-x) in the advanced settings of your BIOS.04 installed; Instructions Step 1 - Enable SME and SEV.you can use the following commands to add/remove devices on the guest:.Use Read & Write Utility to check ACPI structures for IOMMU related tables.I'm pretty sure the AM3 (+) chipsets don't support IOMMUv2, so this is an informative message (not an error).recommend one more argument (to overcome an AMD microcode bug):.081552] DMAR-IR: Enabled IRQ remapping in x2apic mode [ 0.AMD IOMMU spec mention 28 software-visible features Base support: I/O Page Tables for Host Translations, Interrupt Remapping Capabilities header: EFRSup enable/disable, IotlbSup enable/disable EFRSup: all other features not enough time to present all, but we will mention most interesting ones SMI Filter intercept unexpected SMIs blocks or.In which case I don't think you can multiplex devices, it's a lot like PCI passthrough before all these fancy virtualization instructions existed :).If you "PCI passthrough" a device, the device is not available to the host anymore.sudo bash -c 'echo GRUB_CMDLINE_LINUX="amd_iommu=on iommu=pt" >> /etc/default/grub' sudo grub2-mkconfig -o /boot/efi/EFI/centos/grub.QEMU: Checking if IOMMU is enabled by kernel: WARN (IOMMU appears to be.By passing an graphic card to the VM it's possible achieve almost bare metal GPU performance, which is important for gaming or the use of graphical intensive software (like Adobe Photoshop).2020-11-10 · How is the AMD IOMMU used in hyper-transport? How do I enable IOMMU on AMD? Answer Open BIOS menu.No IOMMU detected, please activate it.GPU passthrough is also often known as IOMMU, although this is a bit of a misnomer, since the IOMMU is the hardware ….Check "Kernel DMA Protection" field in the "System Summary" page.Under System Settings in the Settings window, click Processors & Memory.On my x470 MB, virtualization is controlled by SVM (under.713281] AMD-Vi: AMD IOMMUv2 driver by Joerg Roedel [ 0.Intel processors and AMD I/O Virtualization (AMD-Vi or IOMMU) in AMD processors, is an I/O memory management feature that remaps I/O DMA transfers and device interrupts. IOMMU] I can't enable IOMMU / Kernel & Hardware / …. For AMD CPUs (AMD-Vi), it is on if kernel detects IOMMU hardware support to add and remove various devices on a live virtual machine.iommu: Remember when default domain type was set on kernel command line iommu: Add helpers to set/get default domain type iommu: Use Functions to set default domain type in iommu_set_def_domain_type() iommu/amd: Request passthrough mode from IOMMU core iommu/vt-d: Request passthrough mode from IOMMU core x86/dma: Get rid of iommu_pass_through.``` I modify the `GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on"`, modify /etc/modules vfio vfio_iommu_type1 vfio_pci vfio_virqfd add `options vfio_iommu_type1 allow_unsafe_interrupts=1` in /etc/modprobe.[AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge.2021-7-6 · Select AMD-Vi(IOMMU).AMD Virtualization or AMD-V (also known under the code name "Pacifica") is a technology for virtualization of a computer and refers to AMD's implementation of a Secure Virtual Machine in conjunction with an IOMMU.Even with 'intel_iommu=off' in the boot options, confirmed by "Intel-IOMMU: operating system.Set 'IOMMU' to 'Disabled' in your BIOS.You can check directly from linux as follows:.2021-8-11 · To resolve the issue, follow the steps below for IOMMU and boot config file setting.2022-4-2 · Step 3a: Enable IOMMU using GRUB.I need a way to detect if it is enabled or not without having the iommu kernel parameters set (iommu=1, amd_iommu=on, intel_iommu=on).Meanwhile, the intel-iommu device must be specified as the first device -device virtio-net-pci,bus=pcie.The problem with the 1st variant ( amd_iommu=off) is that it turns off the IOMMU.IOMMU support in the motherboard / BIOS: check the .Other system architectures also have similar IOMMU capability, such as [AMD IOMMU], [ARM SMMU].Follow edited Feb 12, 2015 at 0:43.In both cases you need a pci/pci-e device that you want to provide to specific guest.Before configuration, Enable VT-d (Intel) or AMD IOMMU (AMD) on BIOS Setting first.My boot drive is a Samsung 960 NVMe and only other peripheral is a 1080Ti.220506] AMD-Vi: Disabling interrupt remapping due to BIOS Bug(s) Thanks.However, since you have a newer motherboard, the IOMMU setting may be separate from the virtualization settings.2021-6-17 · Disabling IOMMU using the grub command line resolves the issue.AMD는 하이퍼트랜스포트 아키텍처에서의 IOMMU 기술의 방법을 공표하고 있다.You can do this by setting the following in /etc/default/grub.run the following command: sudo gedit /etc/default/grub.How is the AMD IOMMU used in hyper-transport? How do I enable IOMMU on AMD? Answer Open BIOS menu.From: Greg Kroah-Hartman <> Subject [PATCH 5.Disable IOMMU, everything works, enable,and failure to boot or install.This video is about PCIe passthrough to KVM virtual machines.SWIOTLB S oft w are I nput O utput T ranslation L ookaside B uffer is an Intel technology which sort of bypasses the IOMMU and allows for a much more configurable memory management interface.amd_iommu_dump= [HW,X86-64] Enable AMD IOMMU driver option to dump the .Figure 8 illustrates AMD IOMMU hardware description known as IVHD.I tried to install elementaryOS, Ubuntu 12.2021-8-10 · amd_iommu=on iommu=pt 于是调整参数，加上这一段，重启系统，一切正常。 实际上在archlinux上的那片文章很早就看到了，也看到了iommu=pt相关的内容，只是没太注意，因为后面的一句话您同时需要设置iommu=pt，这将防止Linux试图接触(touching)无法直通的设备。.Download and install the AMD South Bridge Driver and AHCI for Windows 7.In that case, users should take care to disable the IOMMU or to set it into passthrough mode prior to running scripts/setup.At the same time, if you are not going to be physically.To disable the IOMMU or place it into passthrough mode, add intel_iommu=off or amd_iommu=off or intel_iommu=on iommu=pt to the GRUB command line on x86_64 system, or add iommu.851042] AMD-Vi: Using IVHD type 0x11 [ 0.Set the parameter iommu=pt in grub config for safety reasons. Tool to enable virtualization AMD. The equivalent for Intel CPUs is intel_iommu=on.Note: on Dell systems the ‘x2APIC Mode’ should be disabled in order to disable the ‘IOMMU’.[AMD] Family 17h (Models 00h-0fh) PCIe GPP Bridge [1022:1453] IOMMU Group 2 00:01.But if you have buggy IOMMU support and all devices within one IOMMU group, hardware can't guarantee good device isolation.static void __init set_iommu_for_device (struct amd_iommu * iommu, u16 devid) amd_iommu_rlookup_table [ devid ] = iommu ; * This function takes the device specific flags read from the ACPI.2007-9-11 · The IOMMU or input/output memory management unit is a computer memory management unit (MMU) that connects a DMA-capable I/O bus to the primary storage memory.If intel_iommu=on or amd_iommu=on works, you can try replacing them with iommu=pt or amd_iommu=pt. · All AMD motherboards should support AMD-V, once you turn it on in the BIOS.2018-9-22 · AMD IOMMU spec mention 28 software-visible features Base support: I/O Page Tables for Host Translations, Interrupt Disable IOMMU simply pass whole traffic Enabled IOMMU intercepts traffic from downstream devices perform permission checks translate addresses on the request.Please see Configurable sysfs parameters for the x86-64 machine check code for sysfs runtime tunables.This solved the problems in Ubuntu .Add this iommu=pt pcie_acs_override=downstream,multifunction nofb nomodeset video=vesafb:off,efifb:off.then i run grub2-mkconfig -o /boot/efi/EFI/ CentOS /grub.When IOMMU is off, it won't even boot.CPU virtualization support is enabled;; VT-d (Intel) or IOMMU (AMD) is enabled.IOMMU is Intel's name for VT-x (virtual memory & execution) and VT-d (virtual PCIe addressing for peripherals).: AMD GART based hardware IOMMU.cfg file as "grub2-mkconfig -o /boot/efi/EFI/redhat/grub.While we should not disable it in kdump kernel when on-flight dma is still on-going.What options are there for amd_iommu_dump? enable/disable maybe? And is the amdgpu bug with SME enabled somehow related? Comment 33 Christoph Nelles 2019-05-05 12:21:56 UTC amd_iommu_dump=1 And during ACPI IVRS is printed on the console/log: ----- example, not related to this issue [ 0.I changed the bios setting to disable iommu and changed grub to read 'GRUB_CMDLINE_LINUX="iommu=soft"'.It would appear that the only way to prevent this bug from occurring would be to disable IOMMU.Click on the "Device Security" icon.In order to run PF_RING ZC on those processors you need to disable IOMMU .[PATCH 0/7] iommu/amd: Disable previously enabled IOMMUs at boot Hi, here is a patch-set refactoring the AMD IOMMU init code a bit to .2016-5-15 · It seems you have amd_iommu=on iommu=soft iommu=pt iommu=1 quiet all enabled at once.When using software IOMMU, the followiing .Select "Enabled" and validate by pressing Enter.1 person found this reply helpful.To support hardware pass-through, the CPU and the motherboard must support it.I am getting this in Event Viewer when opening Sandbox DxgKrnl Event ID 445.On Intel systems it is enabled by default.> > > > set_device_exclusion_range() is not the solution here.Since Intel VT -d has the capability of fine -grained access control per device, it is a better mitigation for DMA attacks.Go to Advanced- > IOMMU and enable/disable AMD IOMMU.org, Kevin Mitchell , Joerg Roedel , Sasha Levin Subject: [PATCH 4.Disable IOMMU in /etc/default/grub with amd_iommu parameter.The device acts as if it were directly driven by the VM, and the VM detects the PCI device as if it were physically connected.off = do not initialize any AMD IOMMU found in the system.Add intel_iommu=on to kernel cmdline arguments) when i edit the grub menu durring boot and i put intel_iommu=on and the i run again virt-host-validate i get.[AMD] Family 17h (Models 00h-0fh) PCIe Dummy Host Bridge [1022:1452] IOMMU Group 10 00:08.Another possibility is that the message is wrong.> >> However I don't know how to generate range_start and range_length, > which are read from ACPI.With virtualization disabled, also disable the AMD IOMMU option.Recommended Solution Disabling IOMMU using the grub command line resolves the issue.If your BIOS doesn't do that it's a good idea to enable though to make sure you log even machine check events that result in a reboot.flexibly enable or disable IOMMU by decision.2022-3-31 · GPU passthrough is a technology that allows the Linux kernel to directly present an internal PCI GPU to a virtual machine.Unfortunately, it is not possible to fix that.If enabled, a hypervisor or operating system supporting this option can use hardware capabilities provided by AMD I/O Virtualization (IOMMU) functionality.Motherboard - Gigabyte x570 Taichi.10 030/105] iommu/amd: Recover from event log overflow: Date: Mon, 7 Mar 2022 10:18:33 +0100.2016-3-3 · 这个地址转译功能自然也可以充当IOMMU，于是GART被Linux kernel用来帮助传统的32位PCI设备访问可寻址范围之外的内存区域。GART iommu有局限性（比如仅限于显存范围内），不具备Intel IOMMU的完整功能。 “iommu”参数默认是打开的，以2.Disable IOMMU for bare-metal installations: Advanced → AMD CBS →NBIO → IOMMU = Disabled.Advanced -> AMD CBS -> NBIO Common Options -> IOMMU: enabled.0017104: Enabling AMD IOMMU in BIOS causes serious performance problems after upgrade from 7.Fixes: 2c0ae1720c09c ('iommu/amd: Convert iommu initialization to state machine') Signed-off-by: Kevin Mitchell Signed-off-by: Joerg Roedel Signed-off-by.amd_iommu_intr= [HW,X86-64] Specifies one of the following AMD IOMMU interrupt remapping modes: legacy - Use legacy interrupt remapping mode. 1409098 – Enabling AMD IOMMU blocks function of Via VL805 USB. GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=on amd_iommu=pt hugepages=8192" Here a short explanation of these parameters: amd_iommu=on is the kernel parameter that enables IOMMU on AMD CPUs.2022-3-20 · The kernel’s command-line parameters¶.For Intel CPUs add quiet intel_iommu=on: GRUB_CMDLINE_LINUX_DEFAULT="quiet intel_iommu=on".245855] BUG: kernel NULL pointer dereference, address: 0000000000000500.1,netdev=net0,disable-legacy=on .org help / color / mirror / Atom feed * [PART2 RFC v2 00/10] iommu/AMD: Introduce IOMMU AVIC support @ 2016-06-13 22:06 Suravee Suthikulpanit 2016-06-13 22:06 ` [PART2 RFC v2 01/10] iommu/amd: Detect and enable guest vAPIC support Suravee Suthikulpanit ` (10 more replies) 0 siblings, 11 replies; 17+ messages in thread From: Suravee Suthikulpanit @ 2016-06-13 22:06.Unfortunately, Proxmox IOMMU … Proxmox ….2019-4-7 · AMD Ryzen ThreadRipper KVM Windows 10 GPU pass-through.If the driver is already installed on your system, updating (overwrite-installing) may fix various issues, add new functions, or just upgrade to the available version.Note: PCI passthrough is an experimental feature in ….See Documentation for further information.Gaming performance is close to baremetal.- Only disable iommu if amd_iommu=off is specified in kdump kernel.On the AMD X370 chipset motherboards, we were able to get multi-GPUs working.An example IOMMU is the graphics address remapping table (GART) used by AGP and PCI Express graphics cards on Intel Architecture and AMD computers.Parent topic: Setting Virtual Processors and Memory.2022-3-27 · amd_iommu=nofullflush, amd_iommu=fullflush, amd_iommu=off, amd_iommu=force_isolation: Enable flushing of IO/TLB entries they are unmapped.SVM is enabled (at least on my desktop HP 705)."Memory Access Protection" will be listed as an available Security Feature, if enabled.Since the introduction of AMD SME support to the Linux kernel, that's led to boot failures on some platforms particularly around IOMMU .("AMD") and "You" as the recipient of the attached AMD Specification (the "Specifi-cation").2021-7-22 · Therefore, rather use intel_iommu=off and/or amd_iommu=off to disable the IOMMU, depending on the processor architecture (or use both, it doesn’t hurt).[AMD] Family 15h (Models 60h-6fh) I/O Memory Management Unit [1022:1577] 00:14.Today, users of some HP Notebook laptops with AMD CPU (like HP Notebook 15-ba006nm) In practice you can live without IOMMU – as I did.IOMMU is a system specific IO mapping mechanism and can be used with most devices.Nvidia in IOMMU Group 13 and AMD Video Card in IOMMU group 15 and 16.config exit the config run make and make modules_install and make install and copy your new kernel to your bootloader This is.Baoquan He Wed, 09 Aug 2017 01:36:03 -0700.Reference More details… Models Alpha 15 A3DC Alpha 15 A3DD.Once everything is working, your dmesg output for IOMMU should look something like this:.To enable the IOMMU feature on an AMD Ryzen system, modify your grub config.VT-d] is an I/O memory management unit (IOMMU) designed for the VMM (Virtual Machine Monitor), to support I/O virtualization.2014-10-3 · The solution to this issue is to enable IOMMU in your GRUB boot parameters.After disabling iommu in the BIOS, try adding iommu=soft to the boot parameters.Disable IOMMU in /etc/default/grub with amd_iommu parameter GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=off" Step 2.The following is a consolidated list of the kernel parameters as implemented by the __setup(), early_param(), core_param() and module_param() macros and sorted into English Dictionary order (defined as ignoring all punctuation and sorting digits before letters in a case insensitive manner), and with ….Hi All, In one of Redhat Document I read that "It is advised by Redhat to disable the IOMMU , Because it occasionally prevents kdump Service .makes no representations or warranties with respect to the accuracy or completeness of the contents of this document and assumes no liability of any kind, including the implied warranties of noninfringement, merchantability or.The VT-d or AMD IOMMU extensions must be enabled in BIOS.IOMMU 简介 随着虚拟化技术逐渐升温，Intel和AMD近来支持了 IOMMU 技术。. 32/64 bit, IOMMU and SWIOTLB in Linux. Note that you will probably also need to enable the "Intel Virtualization Technology" option (which corresponds to the Intel VT-x) since you need the Intel VT-d feature.Kernel boot message: "PCI-DMA: Disabling IOMMU" 2.However, the option may not be supported on all hardware. · CPU: AMD Ryzen 5 2400G (yes i'm using the integrated graphics) I'm using the mesa drivers that Lutris recommends to install (i play overwatch some times) And this is my GRUB_CMDLINE_LINUX_DEFAULT: GRUB_CMDLINE_LINUX_DEFAULT="loglevel=3 amd_iommu=on iommu=pt".Disable amd_iommu in your GRUB boot parameters by appending 'amd.PCIe NIC - Intel PRO/1000 Pt Dual Port Server Adapter (target for passthrough) GPU - AMD RX 570 (target for passthrough later) Drives: 2x 256GB SATA Mirrored (for OS).2021-4-15 · Product Specifications.Disable boot machine check logging.4 Summary: 0006694: IOMMU AMD-Vi not enabled with amd_iommu=on KVM modules loaded but VM can't run: Description: IBM System X3455 (Model 7986) 2xAMD2218 dual-core CPUID OF12 revision 0020 8 Gb RAM memory no IOMMU options in BIOS no PCI cards installed - BMC configured.It discusses what IOMMU is and how it works, the PCIe architecture and how it .2021-12-16 · About Iommu Amd Disable.Set the parameter intel_iommu=on or amd_iommu=on respective to your system in the grub config.IOMMU or VT-d: Set to 'Enabled' or equivalent, often 'Auto' is not the same 'Legacy boot' or CSM: For GPU passthrough it can help to disable this, but keep in mind that PVE has to be installed in UEFI mode, as it will not boot in BIOS mode without this enabled.Tags: linux AMD The Asus AM1-IA motherboard I have unfortunately doesn’t have a BIOS option to enable the IOMMU, despite the fact AM1 socket processors theoretically support it. PATCH v8 13/13] iommu/amd: Disable iommu only if amd. passthrough command line的选项，这个选项配置上后，dma 默认不会走iommu，而是走传统的swiotlb方式的dma； 方式二：smmu v3的驱动默认支持驱动参数配置，disable_bypass，在系统中是默认关闭bypass的，我们可以通过这个来将.Dear Members, Does anyone have experience with MSI B450-A PRO MAX SVM and IOMMU setting ? When I enabled it, it can not POST, Any BIOS update from MSI firmware engineer ? I have uploaded 17 June 2020 version BIOS, the bug is still there.1106 with all drivers installed.How do I turn off IOMMU? Select System Configuration.Isn't it enough to > >>> identity map the GPU device? > >> > >> Ok, there's set_device_exclusion_range() to exclude the device from > IOMMU.[AMD] Family 17h (Models 00h-1fh) PCIe Dummy Host Bridge [1022:1452] IOMMU Group 1 00:01.Disable IOMMU (AMD I/O Virtualization Technology) in your BIOS settings, and disable it!.AMD IOMMU spec mention 28 software-visible features Base support: I/O Page Tables for Host Translations, Interrupt Remapping Capabilities header: EFRSup enable/disable, IotlbSup enable/disable EFRSup: all other features not enough time to present all, but we will mention most interesting ones SMI Filter.Hardware-assisted I/O MMU virtualization called Intel Virtualization Technology for Directed I/O (VT-d) in Intel processors and AMD I/O Virtualization (AMD-Vi or IOMMU) in AMD processors, is an I/O memory management feature that remaps I/O DMA transfers and device interrupts.Disable IOMMU simply pass whole traffic.Disable IOMMU in bios, load optimized defaults and restart. AMD IOMMU and SMBUS Resources Not Listed. Select a virtual machine in the Virtual Machine Library window and click Settings.(“AMD”) and “You” as the recipient of the attached AMD Specification (the “Specifi-cation”).2022-3-29 · Enabling IOMMU feature.Configurable Thermal Design Power (cTDP).2020-12-15 · 欢迎转载，但请在开头或结尾注明原文出处【blog.方式一：将iommu 给彻底给bypass掉，linux 提供了iommu.But as I've recently discovered the 2nd variant ( amd_iommu=fullflush) helps as well in this situation (verified with Linux Mint 18.With this option enabled, AMD IOMMU driver will print ACPI tables for AMD IOMMU during IOMMU initialization.Username Password Keep me signed in Forgot username or password? AMD Employee? Click Here.Type "Troubleshooting" in the Search box from the desktop and click "Troubleshooting".Click "Next" and follow the on-screen instructions to complete the troubleshooting process.Those compiling their own kernel may want to turn off IOMMU in the kernel’s configuration (and there’s a chance that the kernel was compiled with IOMMU features turned off to begin with).Try adding iommu=pt to the end of the GRUB_CMDLINE_LINUX_DEFAULT= line in /etc/default/grub; run sudo update-grub afterwards, then reboot.[AMD] FCH SMBus Controller [1022:790b] (rev 4a).If your BIOS doesn’t do that it’s a good idea to enable though to make sure you log even machine check events that result in a reboot.the direct device access when disabling IOMMU option in BIOS setup.2020-12-18 · If any change is required, please refer to the guide below.Once in BIOS advanced mode, go to the "Advanced" section (at.0 SMBus [0c05]: Advanced Micro Devices, Inc.This seems like a HP BIOS specific issue.2 IOMMU [0806]: Advanced Micro Devices, Inc.Disable IOMMU, load optimized defaults and restart.If you have an Intel CPU, the IOMMU technology is called "Intel VT-d".而Solaris对 IOMMU 技术在SPARC平台上的支持则可能要追溯到它们诞生的时候了。.Therefore, rather use intel_iommu=off and/or amd_iommu=off to disable the IOMMU, depending on the processor architecture (or use both, it doesn't hurt).It's ok to disable iommu early in normal kernel or in kdump kernel when amd_iommu=off is specified.For me it came down to the proprietary drivers vs the kernel (generic) drivers.After disabling iommu in the BIOS, try adding iommu=soft to the .Unfortunately, Proxmox IOMMU … Proxmox device passthrough Read More ».IOMMU sounds like a generic name for Intel VT-d and AMD IOV.I suggest you edit grub and only have quiet, amd_iommu=on and iommu=pt enabled.50 BIOS, updated Windows 10 1511 Build 10586.[AMD] Starship/Matisse Root Complex Disable IOMMU and test - it is currently enabled.when i run virt-host-validate i get.The document at hand provides an overview of the AMD EPYC* 7003 we had to remove the iommu element, in the section of the VM .avic=1" in case you are using an Intel CPU the line should ….2021-8-26 · Disable if low latency is of higher priority than the new increased security.Navigate to /usr/src/linux make menuconfig Navigate to processor type and features Scroll down until you see Built-in kernel command line and enable it add iommu=pt and intel_iommu=on (or amd_iommu=on) save your.You can disable the iommu by adding 'intel_iommu=off' to the boot options.It's mostly for servers and very herky work stations and platform test environments.This option allows to turn off the feature.When disabling AMD SME in kernel, the PCI devices are mapped using the amd native IOMMU driver.From: Greg Kroah-Hartman To: [email protected] only i can access my pci device from.This eluded me somewhat as I believed that iommu was an AMD alternative to VT-D.The AMD Ryzen ThreadRipper CPU is, thanks to the enormous core count, perfect for virtualization.org help / color / mirror / Atom feed * [PART2 PATCH v3 00/11] iommu/AMD: Introduce IOMMU AVIC support @ 2016-07-11 10:11 Suravee Suthikulpanit 2016-07-11 10:11 ` [PART2 PATCH v3 01/11] iommu/amd: Detect and enable guest vAPIC support Suravee Suthikulpanit ` (10 more replies) 0 siblings, 11 replies; 18+ messages in thread From: Suravee Suthikulpanit @ 2016-07-11 10.[PATCH] PCI/MSI: don't disable AMD IOMMU MSI on Xen dom0 (was: Re: [PATCH V2] amd iommu: re-enable iommu msi if dom0 disabled it.This option does not override iommu=pt amd_iommu_dump= [HW,X86-64] Enable AMD IOMMU driver option to dump the ACPI table for AMD IOMMU.Then the pages of rlookup table is freed as well.Re: [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems From: Christian KÃnig Date: Fri Dec 06 2019 - 03:57:41 EST Next message: Kunihiko Hayashi: "Re: [PATCH 2/2] PCI: uniphier: Add checking whether PERST# is deasserted".Disable if low latency is of higher priority than the new increased security.Disabled by default on AMD Fam10h and older because some BIOS leave bogus ones.Afterward, settings are available in Windows 7's Device Manager.Disabling IOMMU using the grub command line resolves the issue.Those compiling their own kernel may want to turn off IOMMU in the kernel's configuration (and there's a chance that the kernel was compiled with IOMMU features turned off to begin with).Advanced → AMD CBS → UMC → DDR4 → Security → TSME = Disabled.2 An Introduction to IOMMU Infrastructure in the Linux Kernel Abstract The Input-Output Memory Management Unit (IOMMU) is a component in a memory controller that translates device virtual addresses (can be also called I/O addresses or device.AMD-Vi: Unable to write to IOMMU perf counter After looking up other answers, they mostly suggest to turn IOMMU off.force_isolation = Force device isolation for all devices.Reference More details… Models Alpha 15 A3DC Alpha 15 A3DD Alpha 15 A3DDK Alpha 15 A3DCK Alpha 15.AMD_IOMMU_V2 AMD IOMMU Version 2 driver.amd_iommu=pt tells the kernel to bypass DMA translation to the memory, which may improve.Do ps -ef and look for [amd_iommu_v2].I tried a lot of modifications (disabling iommu in bios, multiple iommu .So these BIOS versions do not disable VT-d support, but just disable user ability to AMD 990FX, 990X and 970 chipsets support IOMMU.CPU: AMD Ryzen 7 3700X 8-Core @ 3600 MHz. · On my motherboard (Asrock B550M Steel Legend, P1.Im trying to set intel_iommu=on on kernel parameters at grub but for some reason it doesnt work.做过DPDK/SPDK开发或者用kvm做过pci passthrough的一定知道以下的配置: 好多人对这些配置很疑惑，不知道这些配置的是做什么的，配或者不配对性能有什么影响。.The only workaround - use ACS override patch witch ignore IOMMU hardware check.2015-11-25 · MSI BIOS (American Megatrends) Enable IOMMU for AMD CPU.2021-8-11 · Intel processors and AMD I/O Virtualization (AMD-Vi or IOMMU) in AMD processors, is an I/O memory management feature that remaps I/O DMA transfers and device interrupts. · Some Ubuntu forum posts suggest using "iommu=soft" in grub or kernel options.v6->v7: Two main changes are made according to Joerg's suggestion: - Add is_attach_deferred call-back to iommu-ops.It seems you have amd_iommu=on iommu=soft iommu=pt iommu=1 quiet all enabled at once.There are also messages about unstable clocks.There are many others (usually documented in driver documentation), but only the AMD64 specific ones are listed here.2 (no driver attached) ivhd0: on acpi0.Some posts say it's just a problem when booting the USB installer, but I still can't boot with IOMMU set to either Auto or Enabled.0 ports on the motherboard provided by the VL 805 chipset are non-functional but the USB 2.With this domain can be deferred to device driver init cleanly.else echo "AMD-V / VT-X is not enabled in the BIOS/UEFI" fi I couldn't find a way to check if Intel's VT-D or AMD's IOMMU are enabled in the BIOS/UEFI.Virtualization option settings.Note: on Dell systems the 'x2APIC Mode' should be disabled in order to disable the 'IOMMU'.B)Ubuntu server VM with exposed 2 physical NICs.edit the empty quotes in this line to read: GRUB_CMDLINE_LINUX="iommu=soft" save changes, exit gedit and the terminal.GRUB_CMDLINE_LINUX_DEFAULT="quiet splash amd_iommu=off".Register now! If you haven't already registered, now is a good time to do so.IBM System X 3455 AMD 2218: OS: CentOS: OS Version: 6.but no Question mark or anything , just normal.The pt option only enables IOMMU for devices used in passthrough and will provide better host performance.06-PUB—Apr 2021 AMD I/O Virtualization Technology (IOMMU) Specification Specification Agreement This Specification Agreement (this "Agreement") is a legal agreement between Advanced Micro Devices, Inc.0 should work now in Ubuntu, and disabling IOMMU in BIOS .sudo bash -c 'echo GRUB_CMDLINE_LINUX="amd_iommu=on .Click on "Advanced" and then click on "Run as Administrator".GRUB_CMDLINE_LINUX_DEFAULT="quiet amd_iommu=on video=efifb:off" update grub.) These problems are occurring on a new AMD FX-8350 8-core CPU with an ASUS M5A97 motherboard that has the AMD 970 Northbridge and 950 southbridge chipsets.Please refer to the attachment file for detail instructions.Solutions: Solution 1: BIOS & Advanced & AMD-IOMMU set as Disabled. Linux kernel enable the IOMMU. AMD-Vi (IOMMU) on the other hand, is a feature that only some motherboards support.The following is a consolidated list of the kernel parameters as implemented by the __setup(), early_param(), core_param() and module_param() macros and sorted into English Dictionary order (defined as ignoring all punctuation and sorting digits before letters in a case insensitive manner), and with descriptions where known.The AMD IOMMU logs I/O page faults and such to a ring buffer in system memory, and this ring buffer can overflow.From: root It's ok to disable iommu in normal kernel.Thanks, so i will disable it and svm because i don't use virtual machines.You may have IOMMU but not IOMMU ver 2.14 248/343] iommu/amd: Make iommu_disable safer Date: Fri, 24 Jan 2020 10:31:06 +0100 [thread overview] Message.x86_64, thinkpad e495 / AMD Ryzen 3500u.You can add this parameter video=efifb:off fixes issues that few people have with returning back to the host.AMD Ryzen IOMMU and the B350 Chipset Challenges.This example uses a USB controller device with the PCI identifier code, pci_8086_3a6c , and a fully virtualized guest named win2k3.In order to run PF_RING ZC on those processors you need to disable IOMMU support, you can do this following the steps below: 1.Based on what I found the motherboard and CPU should support this.Kernel boot message: "PCI-DMA: using GART . · Re: IOMMU: Enable or Leave Disbled in BIOS.2: AMD-Vi: Unable to read/write to IOMMU perf counter.The kernel will just loop error messages starting with AMD-Vi: Event logged [IO_PAGE_FAULT device=] The only solution, it seems, is to not .System firmware must tag the PCI ports that require OS runtime DMA protection with the appropriate ACPI _DSD flags: Identifying externally exposed PCIe Root Ports.with Acer A315-42-R296 when AMD-IOMMU BIOS parameter is enabled Problem Disable IOMMU in /etc/default/grub with amd_iommu parameter.0 Host bridge [0600]: Advanced Micro Devices, Inc. PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems. acpi_no_memhotplug [ACPI] Disable memory hotplug.But as I’ve recently discovered the 2nd variant ( amd_iommu=fullflush) helps as well in this situation (verified with Linux Mint 18.5, we are very excited and proud to announce support for Windows hosts with Hyper-V mode enabled! As you may know, this is a joint project from both Microsoft and VMware.Reboot the host for these changes to take effect.3 在BIOS中开启IOMMU选项，如果网卡有对应的虚拟化选项需同步开启2.*Re: [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems 2019-11-29 14:21 [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems Kai-Heng Feng @ 2019-12-01 12:42 ` Lucas Stach 2019-12-02 16:36 ` Deucher, Alexander 2019-12-02 17:00 ` Christoph Hellwig 1 sibling, 1 reply; 15+ messages in thread From: Lucas Stach @ 2019-12-01 12:42 UTC.Click on "View all" from the left pane and select "Hardware and Devices".AMD: I/O Virtualization Reporting Structure (IVRS) table; Intel: DMA Remapping Table (DMAR) table; In the Read & Write Utility, click the ACPI button then check for an IVRS/DMAR tab.Re: [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems From: Christian KÃnig Date: Fri Dec 06 2019 - 03:57:41 EST Next message: Kunihiko Hayashi: "Re: [PATCH 2/2] PCI: uniphier: Add checking whether PERST# is deasserted" Previous message: Hsin-hsiung Wang: "Re: [PATCH v5 06/10] mfd: Add support for the MediaTek MT6358 PMIC" In reply to: Kai-Heng Feng: "Re: [PATCH v2] iommu/amd.做过DPDK/SPDK开发或者用kvm做过pci passthrough的一定知道以下的配置: BIOS中enable vt-d，内核参数配置intel_iommu=on iommu=pt.It seems you are missing splash but you may not want the splash screen anyway.Disable IOMMU bypass, using IOMMU for PCI devices. AMD Processors — PF_RING dev documentation. Well, hello everyone, first time with proxmox, I'm trying to setup GPU passthrough on an AMD platform and following multiple guides/video/wiki I still cannot manage to make it work Server detail : AMD Ryzen Threadripper 1920x (AMD-v and AMD-vi available) Asrock X399 MB with IOMMU enabled and CSM disabled (so full UEFI) AMD Radeon R9 290.Tags: linux AMD The Asus AM1-IA motherboard I have unfortunately doesn't have a BIOS option to enable the IOMMU, despite the fact AM1 socket processors theoretically support it.Disable Virtualization (INTEL) Disable VT-d Disable Virtualization (AMD) Disable IQMMU (AMD CBS > NBIO Common Options > NB Configuration > IOMMU) Disable NX-Bit (Only if available, CPU Settings Secure Virtual Machine) Disable Secure Boot (If the option is greyed out -> clear all keys).0 Black Edition, Crystal 570X RGB ATX Mid Tower,.Select Window > Virtual Machine Library.The AMD driver uses IOMMU in some screwy way.The AMD Virtualization has been enabled in the default settings.This feature (strictly speaking, is a function of the chipset, rather than the CPU) can allow virtual machines to have direct access to hardware I/O.If you need to enable IOMMU due to VFIO or VF requirements use IOMMU=pt in Kernel command line.Enable IOMMU for AMD CPU In the Asus UEFI BIOS, this feature is in “Advanced Go to Advanced- > IOMMU and enable/disable AMD IOMMU.For AMD CPUs add quiet amd_iommu=on:.If that, we have to check rlookup table in irq_remapping_select(), otherwise, it will trigger a kernel panic below.Does Windows Sandbox 1903 support IOMMU ? Even when I have IOMMU enabled in bios and it detected in System Devices with newest AMD Driver installed it says the device is not working because it doesn't have resources.Fortunately, my Intel NUC 8th gen supports it.Comment 32 David Coe 2021-03-19 20:43:19 UTC.The motherboard I'm using is the Gigabyte GA-970A-D3 with AMD FX6300.0 ports provided by the AMD 970 southbridge work fine.+static void iommu_disable(struct amd_iommu *iommu, bool flush) + * This ensures that all in-flight dmas for this iommu + * are complete prior to shutting it down.If you have GRUB, and most installations today will, then you will need to edit your configuration file: nano /etc/default/grub.Microsoft does not support VT-d for cloud clusters in that it prevents fail-over and fail-back for virtual machines.2020-4-3 · then i run grub2-mkconfig -o /boot/efi/EFI/ CentOS /grub.Under linux you get the following dmesg output:.Rep: I've had similar issues with AMD/ASUS and IOMMU, and also have one NVIDIA and one AMD card for passthrough with KVM.While there's no need to disable it in kdump kernel after the on-flight dma issue has heen fixed.If your application scenario does not require virtualization, then disable AMD virtualization technology. PATCH v8 03/13] Revert "iommu/amd: Suppress IO_PAGE. All AMD motherboards should support AMD-V, once you turn it on in the BIOS.Workload Tuning Guide for AMD EPYC™ 7002 Series Processor Based Servers 56745 Rev.0 PCI bridge [0604]: Advanced Micro Devices [AMD] nee ATI RD890 PCI to PCI bridge (PCI express gpp port B) [1002:5a16].[AMD] Family 17h (Models 00h-0fh) Internal PCIe GPP Bridge 0 to Bus B [1022:1454] IOMMU Group 11 00:14.Simple enabling without using shouldn't affect you.Proxmox’ PCI pass-through will allow the admin user to use a physical device such as integrated GPU (iGPU), graphics card unit (GPU), or network interface card (NIC) inside of the virtual machine.The kernel’s command-line parameters¶.2020-7-3 · Proxmox’ PCI pass-through will allow the admin user to use a physical device such as integrated GPU (iGPU), graphics card unit (GPU), or network interface card (NIC) inside of the virtual machine.* - AMD_IOMMU_INV_PRI_RSP_SUCCESS - Send SUCCESS back to the device: 117 * - AMD_IOMMU_INV_PRI_RSP_INVALID - Send INVALID back to the device: 118 * - AMD_IOMMU_INV_PRI_RSP_FAIL - Send Failure back to the device, 119 * the device is required to disable: 120 * PRI when it receives this response: 121 * 122.It's true, cold booted and IOMMU was implemented, but after the second reboot, I got: [ 0.I disabled it and both USB2 and 3 devices are correctly recognized, without changing any grub or kernel options.509 certificate -65][2], where they suggest to edit /etc/default/grub file and then invoke update-grub. · IOMMU is a system specific IO mapping mechanism and can be used with most devices.The solution that I found in September 2017 was to add following boot-parameter for kernel: amd_iommu=off.Run sudo nano /etc/default/grub and edit the line which starts with GRUB_CMDLINE_LINUX_DEFAULT, to match: GRUB_CMDLINE_LINUX_DEFAULT="amd_iommu=on iommu=pt kvm_amd.In this case, you'll need to disable it on order to allow AMD-V to pe you can re-enable AMD-V by setting AMD IOMMU to Enabled (you can .Using Windows Security application: Launch Windows Security application from the Windows Start menu.Click to expand Advanced Options and select the check boxes for the options that you want to use.2021-3-11 · While amd_iommu is set to disable in cmd line, it will free the iommu resources.When IOMMU is enabled in BIOS and Linux version 4.For example, this happens if firmware fails to fill in mmio_phys in the ACPI table leading to a NULL pointer dereference in iommu_feature_disable.On my x470 MB, virtualization is controlled by SVM (under Advanced/CPU Settings); IOMMU is controlled under Advanced/AMD CBS.Like the CPU memory management unit, an IOMMU takes care of mapping virtual addresses (also called device addresses or I/O addresses) to physical addresses and some units guarantee ….rule so most options are to turn off or disable the IOMMU functions.I edit /etc/default/grub file and i add the parameter.Go to Advanced -> SVM Mode and enable/disable AMD SVM.包括我自己曾经也一知半解，今天整理一下，争取让大家柳暗花明。.Enable IOMMU for AMD CPU If you have an AMD CPU, the IOMMU technology will be called IOMMU.For AMD platforms, system firmware must set "DMA remap support” bit in the IVRS IVinfo field (AMD IOMMU Specification Rev 3.The AMD IOMMU + iommu_feature_disable(iommu, CONTROL_EVT_LOG_EN); + iommu_feature_enable(iommu, CONTROL_EVT_LOG_EN); +} + +/* * This function resets the command buffer if the IOMMU stopped fetching.GPU passthrough is also often known as IOMMU, although this is a bit of a misnomer, since the IOMMU is the hardware technology that provides this.220451] [Firmware Bug]: AMD-Vi: No southbridge IOAPIC found in IVRS table [ 0.Re: IOMMU: Enable or Leave Disbled in BIOS.Here is a non-conclusive checklist: IOMMU support in the CPU: Intel VT-d or AMD SVM.3 PCI bridge [0604]: Advanced Micro Devices, Inc.With virtualization disabled, also, disable AMD IOMMU.How do I enable IOMMU on AMD? Open BIOS menu.1 PCI bridge [0604]: Advanced Micro Devices, Inc.Disable amd_iommu in your GRUB boot parameters by appending ‘amd./r/AMD is community run and does not represent AMD in any capacity unless specified.Table 25 summarizes the settings.80 November 2019 Workload Tuning Guide for AMD EPYC™ 7002 Series Processor Based Servers 7 Chapter 2 BIOS Options and Their Benefits 2. · Based on what I found the motherboard and CPU should support this.There's no ability to disable IOMMU from my BIOS.Steps To enable IOMMU sudo bash -c 'echo GRUB_CMDLINE_LINUX="amd_iommu=on iommu=pt" >> /etc/default/grub' sudo grub2-mkconfig -o /boot/efi/EFI/centos/grub.To check IOMMU support when OS boots: Code: dmesg | grep -i IOMMU pci0: at device 0.QEMU: Checking if IOMMU is enabled by kernel: WARN (IOMMU appears to be disabled in kernel. PATCH] amd iommu: force flush of iommu prior during shutdown. 283218] iommu: Default domain type: Translated [ 0.com】介绍 VT-d 和 IOMMU 其实都是指的 I/O 虚拟化，只不过前者是 Intel 的叫法，后者是 AMD 的叫法：VT-d 全称为 Intel® Virtualization Technology fo….The TPM is a tamper-resistant “secure element” used to hold cryptographic keys (including smartcard certificates and BitLocker credentials).If any change is required, please refer to the guide below.IOMMU is a MMU for I/O operations between peripherals.host physical addresses by the IOMMU.6-arch1-1 without any modifications.80 November 2019 6 Chapter 1 Introduction Default BIOS options are generally selected to produce the best overall performance for typical.The Asus AM1-IA motherboard I have unfortunately doesn’t have a BIOS option to enable the IOMMU, despite the fact AM1 socket processors theoretically support it.It can cause differences in latency for memory access. PATCH v8 13/13] iommu/amd: Disable iommu only if amd_iommu. (Passthrough)When enabled, a Virtual Machine Manager supporting this feature can use hardware capabilities provided by the AMD I/O Memory Management Unit (IOMMU) .Messages sorted by: [ date ] [ thread ] [ subject ] [ author ] While amd_iommu is set to disable in cmd line, it will free the iommu resources.PCI passthrough allows you to use a physical PCI device (graphics card, network card) inside a VM (KVM virtualization only).Proxmox' PCI pass-through will allow the admin user to use a physical device such as integrated GPU (iGPU), graphics card unit (GPU), or network interface card (NIC) inside of the virtual machine.Otherwise they are flushed before they will be reused, which is a lot of faster.[PATCH v10 12/12] iommu/amd: Disable iommu only if amd_iommu=off is specified.Creation of a virtual GPU on the adapter (0xffffc888cad0a000) failed with the status (3221225485), reason (DXGK_VGPU_FAILURE_IOMMU_ENABLE) My Computer.Therefore, rather use intel_iommu=off and/or amd_iommu=off to disable the IOMMU, depending on the processor architecture (or use both, it doesn’t hurt).What is AMD fTPM mode? "fTPM" is a type of TPM that's implemented in system firmware instead of using a dedicated chip.Since I do run VMs, my GRUB_CMDLINE_LINUX_DEFAULT= has amd_iommu=on iommu=pt added.A)Windows VM with exposed VGA adapter.If you haven't already registered, now is a good time to do so.So should I turn IOMMU ON or OFF in bios? I'm currently running windows 10 for movies and games and I'm not sure if I'm going to get any .713282] AMD-Vi: AMD IOMMUv2 functionality not available on this system.Also make sure you specify all devices within a IOMMU group.Signed-off-by: Baoquan He --- v9->v10: Change to call disable_iommus() in normal kernel and the case that amd_iommu=off is set in kdump kernel.1908: Description: So far, problem appears isolated to HP ProLiant DL325 Gen10 (1 x AMD EPYC 7702P 64-Core) Possibly related to Mellanox Technologies MT27800 Family [ConnectX-5] (mlx5e_core) Servers were running OK under 7.2019-12-6 · Re: [PATCH v2] iommu/amd: Disable IOMMU on Stoney Ridge systems From: Christian KÃnig Date: Fri Dec 06 2019 - 03:57:41 EST Next message: Kunihiko Hayashi: "Re: [PATCH 2/2] PCI: uniphier: Add checking whether PERST# is deasserted" Previous message: Hsin-hsiung Wang: "Re: [PATCH v5 06/10] mfd: Add support for the MediaTek MT6358 PMIC" In ….All virtualization features are enabled in the bios (VT-D, SVM, etc).After you register, you can post to the community, receive email notifications, and lots more.If that, we have to check rlookup table in irq_remapping_select (), otherwise, it will trigger a kernel panic below. PDF System Tuning Guide for AMD Instinct™ GPU Servers with. To enable the IOMMU flag from the Administration Portal, see Adding a Host to the Red Hat Virtualization Manager and Kernel Settings Explained in the Administration.Idk how you do that  in Unraid, and if it uses grub or not, but you need to edit the kernel parameters and add something like amd_iommu=off and intel_iommu=on they are typically done in traditional linux OS in /etc/default/grub after GRUB_DEFAULT_CMDLINE="quiet splash amd_iommu=off intel_iommu=on", Then you should update the bootloader.Virtualization Options If your application scenario does not require virtualization, then disable AMD Virtualization Technology.For example here: [AMD-Vi: Unable to read/write to IOMMU coun / Problem loading X.option ROM on this device and disable DMA for capabilities, such as AMD IOMMU or ARM SMMU.It is BIOS dependent so only when the BIOS supports it where you can use it.SR-IOV is different, the peripheral itself must.What is AMD fTPM mode? “fTPM” is a type of TPM that’s implemented in system firmware instead of using a dedicated chip.As zcot mentioned, you can turn off virtualization if you don't plan on running a VM.x86_64 is booted on an AMD 970 chipset, the recognition of the VIA VL805 chipset for USB 3.[AMD] FCH SMBus Controller [1022:790b.Welcome to /r/AMD — the subreddit for all things AMD; come talk about Ryzen, Threadripper, EPYC, Navi, RDNA2, rumours, show-off your build and more.Intel generally adopts "an-always-enable-it-if-it-is-supported" rule so most options are to turn off or disable the IOMMU functions.Append amd_iommu=on and iommu=pt to the end of the GRUB_CMDLINE_LINUX line in the /etc/default/grub configuration file. AMD 2nd Gen EPYC CPU Tuning Guide for InfiniBand HPC. This will work only if hardware,bios & finally processor and chip set should have the support for "IOMMU"(AMD) or "VT-D"(intel).In this gigabyte GA-A320M-S2H mobo there is an option to set IOMMU to Auto/Disabled/Enabled, apart from enabling the AMD SVM virtualization extensions in a separate BIOS menu.80 firmware) to enable IOMMU: Code: Advanced -> AMD CBS -> NBIO Common Options -> IOMMU: enabled.In this gigabyte GA-A320M-S2H mobo there is an option to set IOMMU to Auto/Disabled/Enabled, apart from enabling the AMD SVM virtualization .And guest now can see PCI device (in my case OpenBSD with WLAN card): Code: # pcidump Domain /dev/pci0.If you saw the 8 core/ 16 thread AMD Ryzen 7 release as an awesome opportunity for building hardware-accelerated virtual desktops with IOMMU, you were not alone.Click on "Core isolation details". AMD64 Specific Boot Options — The Linux Kernel. org Cc: Greg Kroah-Hartman , [email protected] refer to the attachment file for.con dmesg | grep -e DMAR -e IOMMU -e AMD-Vi.Enable the IOMMU flag in the kernel by selecting the Hostdev Passthrough & SR-IOV check box when adding the host to the Manager or by editing the grub configuration file manually.If later the passthrough still fails.acpi_no_static_ssdt [HW,ACPI] Disable installation of static SSDTs at early boot time By default, SSDTs contained in the RSDT/XSDT will be installed automatically and they will appear under /sys/firmware/acpi/tables.cfg sudo reboot To disable IOMMU sudo bash -c 'echo GRUB_CMDLINE_LINUX="amd_iommu=off" >> /etc/default/grub'.06-PUB—Apr 2021 AMD I/O Virtualization Technology (IOMMU) Specification Specification Agreement This Specification Agreement (this “Agreement”) is a legal agreement between Advanced Micro Devices, Inc.Having both iommu=pt (pass through mode) and iommu=soft (software mode) ….It doesn't look like iommu=pt is useful/supported for x86_64.