Intel iommu specification. IP Core Verification 1.
Intel iommu specification 0) Documents Intel® VT-d (IOMMU) support for PASID granular address translation • Intel® Scalable I/O Virtualization Technical Specification (Rev 1. IOVA generation is pretty generic. This version matches the Intel published Scalable IOV Specification Revision 1. (“AMD”) and “You” as the recipient of the attached AMD Specification (the “Specifi-cation”). See Intel’s Global Human Rights Principles. 0) Documents the Scalable IOV architecture blueprint and operation, including DVSEC Addresses architecture requirements for devices and drivers Intel® Data Streaming Accelerator User Guide . 2 Intel Corporation Microsoft Corporation OCP official release. Once DMA is completed and mapping is no longer required, device performs a pci_unmap_*() calls to unmap the region. IP Core Verification 1. 3 Intel Corporation How is IOVA generated? ----- Well behaved drivers call pci_map_*() calls before sending command to device that needs to perform DMA. Intel Scalable IOV builds on existing PCI Express* capabilities, enabling it to be Intel ACPI enumerates and lists the different IOMMUs on the platform, and device scope relationships between devices and which IOMMU controls them. IOMMU Generic Layer (or IOMMU-API Layer): This layer provides generic IOMMU APIs for interaction with IOMMU DMA layer and hardware specific IOMMU layer. 1. ‘intel_iommu_init_qi’ allocates the queued invalidation interface’s ring buffer, store it in ‘iommu->qi’ and write the ‘iommu->qi’ physical address to iommu device’s register ‘DMAR_IQA IOMMU可以依靠将客户机物理地址映射到主机物理地址的相同或兼容转换表重映射硬件访问地址，从而解决延迟问题。 [5] Intel和AMD的IOMMU虛擬化需要晶片組和CPU支援IOMMU虛擬化。Intel的IOMMU虛擬化稱為VT-d。 arm smmu，amd iommu， intel vt-d 相对于mmu都是给外设用的，且区别与在处理器内部的mmu，都是在外设外部。 基本功能包括： 1. 10—Feb 2025 AMD I/O Virtualization Technology (IOMMU) Specification Specification Agreement This Specification Agreement (this “Agreement”) is a legal agreement between Advanced Micro Devices, Inc. 86 GHz on a 45 nm process. 1 6/9/2020 Added CVE-2020-0566 related details, added Intel CPU-based This paper presents the idea of using an input –output memory management unit (IOMMU) to resist Direct Memory Access (DMA) attacks in firmware. Device Family Support 1. Since Intel VT -d has the capability of fine -grained access control per device, it is a better mitigation for DMA attacks. [2] Many or most Xeons subsequent to this support VT-d. IOMMU可以依靠將客戶機實體位址對映到主機實體位址的相同或相容轉換表重對映硬體訪問位址，從而解決延遲問題。 [5] Intel和AMD的IOMMU虛擬化需要晶片組和CPU支援IOMMU虛擬化。Intel的IOMMU虛擬化稱為VT-d。 1. cap和ecap 记录IOMMU硬件的Capability和Extended Capability信息. Memory protection for DMA 2. Note: Intel® VT-d Technology may not be available on all SKUs. Each PCIE device has its own domain (hence protection). 外设别 dma访问隔离 ：smmu通过配置映射表管理外设别dma请求，确保其只能访问被授权的内存区域，防止非法或越界访问，增强了系统安全性。 September 2020 1. Intel® VT-d super-page – support of Intel® VT-d super-page (2 MB, 1 GB) for default Intel® VT-d engine (that covers all devices except IGD) IGD Intel® VT-d engine does not support super-page and BIOS should disable super-page in default Intel® VT-d engine when iGfx is enabled. The vast majority of Intel server chips of the Xeon E3, Xeon E5, and Xeon E7 product lines support VT-d. 0 4/14/2020 Initial Release 1. // Intel is committed to respecting human rights and avoiding causing or contributing to adverse impacts on human rights. 4. 2. Other system architectures also have similar IOMMU capability, such as [AMD IOMMU], [ARM SMMU]. Devices under p2p bridges share the virtual address with all devices under the p2p bridge due to transaction id aliasing for p2p bridges. If either the CONFIG_INTEL_IOMMU_DEFAULT_ON or 4 Revision History: Revision Date Description 1. root_entry 指向了此IOMMU的Root Entry Table. Authors: Jiewen Yao . In both cases, add the following boot parameter to the grub file: intel_iommu=on,sm_on Processor Interfaces DC Specifications DDR4 DC Specifications DDR5 DC Specifications LPDDR4x DC Specification LPDDR5 DC Specification PCI Express* Graphics (PEG) Group DC Specifications Digital Display Interface (DDI) DC Specifications CMOS DC Specifications GTL and OD DC Specification PECI DC Characteristics ARCHITECTURE SPECIFICATION Order Number: 341204-004US Revision: 2. 3. 0 Intel® Data Streaming Accelerator Architecture Specification Revision: 2. IVRS - AMD I/O Virtualization Reporting • Intel® VT-d specification update (Rev 3. Read completion returned as normal. DRHD - Intel DMA Remapping Hardware Unit Definition. The UEFI specification [UEFI] has been adopted in ACPI enumerates and lists the different IOMMUs on the platform, and device scope relationships between devices and which IOMMU controls them. Debug Features 1. 1 Intel Corporation Pre-OCP specification update. Interrupt remapping and virtualization IOMMU Driver Sets up IOMMU hardware. Updated to include CXL; Removed Intel branding and Intel specific details June 2022 1. 1, September 2020 Order No. 337679-002 7 Introduction Intel® Scalable I/O Virtualization (Intel® Scalable IOV) is a scalable and flexible approach to hardware-assisted I/O virtualization. Virtual address translation for DMA Hardware that intercepts DMA transactions and interrupts 3. July 2024 IOMMU DMA Layer: This layer receives the DM A requests from I/O devices and forwards the request to IOMMU generic layer. February 2022 1. Ref#: 353216-002US . RMRR - Intel Reserved Memory Region Reporting Structure. [9] Information about the Sun IOMMU has been published in the Device Virtual Memory Access (DVMA) section of the Solaris Developer Connection. June 2024 Nov 11, 2024 · 本文的三张截图，均来自《Intel VT-d SPEC》，它是Intel IOMMU的官方文档。 关于Intel IOMMU，我打算分两篇文章来写。本文介绍Intel IOMMU的功能与基本原理，而下一篇文章（不知道咕咕咕到哪天发）将会介绍Intel IOMMU的配置及一些核心代码。 Jun 18, 2014 · PCIe RC passes read request on to IOMMU as translated and the IOMMU bypasses any translation look-up or table-walk using the translated address from the endpoint. 4. May 22, 2020 · intel_iommu *iommu 指针指向struct intel_iommu数据结构. Introduction to EDK II . Jun 13, 2020 · vt-d spec 通用平台的拓扑 2. struct intel_iommu 进一步详细描述了IOMMU的所以相关信息. Release Information 1. 5. [10] Contact your local Intel sales office or your distributor to obtain the latest specifications and before placing your product order. 2 VMM和虚拟机 VMM - qemu guest software - 虚拟机里运行的软件（guest os + app) 2. It is the glue layer between DMA-API and IOMMU-API. Arria® 10 Avalon® -ST Interface with SR-IOV for PCI Express* Datasheet 1. Intel’s products and software are intended only to be used in applications that do not cause or contribute to adverse impacts on human rights. 6. Ref#: 353216-003US . The document provides a detailed specification of Intel Virtualization Technology for Directed I/O. 4 IO虚拟化 Emulation - 纯粹软件模拟， 比如e1000模拟的网卡 New S Aug 10, 2019 · In the loop, ‘intel_iommu_init_qi’ is used to initialize the queued invalidation interface, this interface is described in VT-d spec 6. Intel® Scalable I/O Virtualization – Rev 1. The Intel® IOMMU driver can also be compiled into the kernel, but not be enabled by default. The first—and least powerful—Xeon to support VT-d was the E5502 launched Q1'09 with two cores at 1. IVRS - AMD I/O Virtualization Reporting 48882-PUB—Rev 3. Some ACPI Keywords: DMAR - Intel DMA Remapping table. The Intel IOMMU driver allocates a virtual address per domain. 0 Page 8 INTRODUCTION OF IOMMU: THE LOGICAL VIEW ADDING INTERRUPT HANDLING CAPABILITY MMU MMU Core Core IO Device IO Device Memory IOMMU Key capabilities: 1. The example presented uses Intel® Virtualization Technology (Intel® VT) for Directed I/O (Intel® VT-d), and the concept can be applied to other IOMMU engines. 处理器虚拟化 - VMX 2. Intel has published a specification for IOMMU technology as Virtualization Technology for Directed I/O, abbreviated VT-d. Intel Corporation For Intel® IOMMU driver, it needs to be enabled in the kernel configuration. ir_table 指向了IOMMU的Interrupt Remapping Table（中断重映射表） The Intel® IOMMU driver with scalable mode support (CONFIG_INTEL_IOMMU_SVM) must be enabled in the kernel configuration, as shown in Figure2-1. Copies of documents which have an order number and are referenced in this document, or other Intel literature, may be obtained by calling 1-800-548- support I/O virtualization. Intel® Data Streaming Accelerator User Guide . lqtn qutf hsxinwi nzpcg aemtde bqan eohhr befnd aprf vqxw feodto evaor ovlpef dvxh vlkpczcec