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公开(公告)号:US12271616B2
公开(公告)日:2025-04-08
申请号:US17348586
申请日:2021-06-15
Applicant: Intel Corporation
Inventor: Utkarsh Y. Kakaiya , David Koufaty , Rajesh Sankaran , Vedvyas Shanbhogue
Abstract: An embodiment of an integrated circuit comprises circuitry to share page tables associated with a page between a processor memory management unit (MMU) and an input/output memory management unit (IOMMU), store a page table entry in the memory associated with the page, and separately control access to the page from a processor and from a direct memory access (DMA) request based on one or more fields of the stored page table entry. Other embodiments are disclosed and claimed.
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公开(公告)号:US20240388494A1
公开(公告)日:2024-11-21
申请号:US18785714
申请日:2024-07-26
Applicant: Intel Corporation
Inventor: Mona Hossain , Sanjay Kumar , Utkarsh Y. Kakaiya
Abstract: A server is provided. The server comprises one or more interfaces configured to communicate with a client and processing circuitry configured to control the one or more interfaces and to transmit an interrupt to the client informing the client about an operation state of the server.
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公开(公告)号:US12112204B2
公开(公告)日:2024-10-08
申请号:US17884244
申请日:2022-08-09
Applicant: Intel Corporation
Inventor: Pratik M. Marolia , Aaron J. Grier , Henry M. Mitchel , Joseph Grecco , Michael C. Adler , Utkarsh Y. Kakaiya , Joshua D. Fender , Sundar Nadathur , Nagabhushan Chitlur
CPC classification number: G06F9/5027 , G06F9/468 , G06F9/4843 , G06F9/5044
Abstract: A system comprising an accelerator circuit comprising an accelerator function unit to implement a first function, and one or more device feature header (DFH) circuits to provide attributes associated with the accelerator function unit, and a processor to retrieve the attributes of the accelerator function unit by traversing a device feature list (DFL) referencing the one or more DFH circuits, execute, based on the attributes, an application encoding the first function to cause the accelerator function unit to perform the first function.
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公开(公告)号:US12086082B2
公开(公告)日:2024-09-10
申请号:US17026516
申请日:2020-09-21
Applicant: Intel Corporation
Inventor: Pratik Marolia , Sanjay Kumar , Rajesh Sankaran , Utkarsh Y. Kakaiya
CPC classification number: G06F13/20 , G06F3/061 , G06F3/0655 , G06F3/0662 , G06F3/0679 , G06F9/45558
Abstract: Methods and apparatus for PASID-based routing extension for Scalable IOV systems. The system may include a Central Processing Unit (CPU) operatively coupled to a scalable Input/Output Virtualization (IOV) device via an in-line device such as a smart controller or accelerator. A Control Process Address Space Identifier (C-PASID) associated with a first memory space is implemented in an Assignable Device Interface (ADI) for the IOV device. The ADI also implements a Data PASID (D-PASID) associated with a second memory space in which data are stored. The C-PASID is used to fetch a descriptor in the first memory space and the D-PASID is employed to fetch data in the second memory space. A hub embedded on the in-line device or implemented as a discrete device is used to steer memory access requests and/or fetches to the CPU or to the in-line device using the C-PASID and D-PASID. IOV devices include multi-PASID helper devices and off-the-shelf devices such as NICs with modified ADIs to support C-PASID and D-PASID usage.
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公开(公告)号:US12013790B2
公开(公告)日:2024-06-18
申请号:US18321490
申请日:2023-05-22
Applicant: Intel Corporation
Inventor: Utkarsh Y. Kakaiya , Sanjay Kumar , Rajesh M. Sankaran , Philip R. Lantz , Ashok Raj , Kun Tian
IPC: G06F12/1009 , G06F9/455 , G06F12/06 , G06F12/1081
CPC classification number: G06F12/1009 , G06F9/45558 , G06F12/063 , G06F12/1081 , G06F2009/45579 , G06F2009/45583 , G06F2009/45591
Abstract: Embodiments of apparatuses, methods, and systems for unified address translation for virtualization of input/output devices are described. In an embodiment, an apparatus includes first circuitry to use at least an identifier of a device to locate a context entry and second circuitry to use at least a process address space identifier (PASID) to locate a PASID-entry. The context entry is to include at least one of a page-table pointer to a page-table translation structure and a PASID. The PASID-entry is to include at least one of a first-level page-table pointer to a first-level translation structure and a second-level page-table pointer to a second-level translation structure. The PASID is to be supplied by the device. At least one of the apparatus, the context entry, and the PASID entry is to include one or more control fields to indicate whether the first-level page-table pointer or the second-level page-table pointer is to be used.
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公开(公告)号:US11995462B2
公开(公告)日:2024-05-28
申请号:US18153177
申请日:2023-01-11
Applicant: Intel Corporation
Inventor: Sanjay Kumar , Philip R. Lantz , Kun Tian , Utkarsh Y. Kakaiya , Rajesh M. Sankaran
IPC: G06F9/455 , G06F9/30 , G06F12/1009
CPC classification number: G06F9/45558 , G06F9/30101 , G06F12/1009 , G06F2009/45579
Abstract: Techniques for transferring virtual machines and resource management in a virtualized computing environment are described. In one embodiment, for example, an apparatus may include at least one memory, at least one processor, and logic for transferring a virtual machine (VM), at least a portion of the logic comprised in hardware coupled to the at least one memory and the at least one processor, the logic to generate a plurality of virtualized capability registers for a virtual device (VDEV) by virtualizing a plurality of device-specific capability registers of a physical device to be virtualized by the VM, the plurality of virtualized capability registers comprising a plurality of device-specific capabilities of the physical device, determine a version of the physical device to support via a virtual machine monitor (VMM), and expose a subset of the virtualized capability registers associated with the version to the VM. Other embodiments are described and claimed.
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公开(公告)号:US20230418762A1
公开(公告)日:2023-12-28
申请号:US18321490
申请日:2023-05-22
Applicant: Intel Corporation
Inventor: Utkarsh Y. Kakaiya , Sanjay Kumar , Rajesh M. Sankaran , Philip R. Lantz , Ashok Raj , Kun Tian
IPC: G06F12/1009 , G06F9/455 , G06F12/06 , G06F12/1081
CPC classification number: G06F12/1009 , G06F9/45558 , G06F12/063 , G06F12/1081 , G06F2009/45579 , G06F2009/45583 , G06F2009/45591
Abstract: Embodiments of apparatuses, methods, and systems for unified address translation for virtualization of input/output devices are described. In an embodiment, an apparatus includes first circuitry to use at least an identifier of a device to locate a context entry and second circuitry to use at least a process address space identifier (PASID) to locate a PASID-entry. The context entry is to include at least one of a page-table pointer to a page-table translation structure and a PASID. The PASID-entry is to include at least one of a first-level page-table pointer to a first-level translation structure and a second-level page-table pointer to a second-level translation structure. The PASID is to be supplied by the device. At least one of the apparatus, the context entry, and the PASID entry is to include one or more control fields to indicate whether the first-level page-table pointer or the second-level page-table pointer is to be used.
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公开(公告)号:US11698866B2
公开(公告)日:2023-07-11
申请号:US16651786
申请日:2017-12-29
Applicant: Intel Corporation
Inventor: Utkarsh Y. Kakaiya , Sanjay Kumar , Rajesh M. Sankaran , Philip R. Lantz , Ashok Raj , Kun Tian
IPC: G06F12/1009 , G06F9/455 , G06F12/06 , G06F12/1081
CPC classification number: G06F12/1009 , G06F9/45558 , G06F12/063 , G06F12/1081 , G06F2009/45579 , G06F2009/45583 , G06F2009/45591
Abstract: Embodiments of apparatuses, methods, and systems for unified address translation for virtualization of input/output devices are described. In an embodiment, an apparatus includes first circuitry to use at least an identifier of a device to locate a context entry and second circuitry to use at least a process address space identifier (PASID) to locate a PASID-entry. The context entry is to include at least one of a page-table pointer to a page-table translation structure and a PASID. The PASID-entry is to include at least one of a first-level page-table pointer to a first-level translation structure and a second-level page-table pointer to a second-level translation structure. The PASID is to be supplied by the device. At least one of the apparatus, the context entry, and the PASID entry is to include one or more control fields to indicate whether the first-level page-table pointer or the second-level page-table pointer is to be used.
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公开(公告)号:US20230205562A1
公开(公告)日:2023-06-29
申请号:US17560251
申请日:2021-12-23
Applicant: Intel Corporation
Inventor: Abhishek Basak , Vedvyas Shanbhogue , Rajesh Sankaran , Rupin Vakharwala , Utkarsh Y. Kakaiya , Eric Geisler , Ravi Sahita
CPC classification number: G06F9/45558 , G06F13/4221 , G06F2009/45587 , G06F2009/45583 , G06F2009/45579 , G06F2213/0026
Abstract: Systems, methods, and apparatuses for implementing input/output extensions for trust domains are described. In one example, a hardware processor includes a hardware processor core comprising a trust domain manager to manage one or more hardware isolated virtual machines as a respective trust domain with a region of protected memory, and input/output memory management unit (IOMMU) circuitry coupled between the hardware processor core and an input/output device, wherein the IOMMU circuitry is to, for a request from the input/output device for a direct memory access of a protected memory of a trust domain, allow the direct memory access in response to a field in the request being set to indicate the input/output device is in a trusted computing base of the trust domain.
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公开(公告)号:US20230103000A1
公开(公告)日:2023-03-30
申请号:US17485386
申请日:2021-09-25
Applicant: Intel Corporation
Inventor: Rupin Vakharwala , Prashant Sethi , Rajesh M. Sankaran , Philip R. Lantz , David J. Harriman , Utkarsh Y. Kakaiya , Vinay Raghav , Ashok Raj , Siva Bhanu Krishna Boga
IPC: G06F12/1027 , G06F12/0802 , G06F13/42
Abstract: Embodiments of apparatuses, methods, and systems for hardware manage address translation services are described. In an embodiment, an apparatus includes a first interconnect, a second interconnect, address translation hardware, a device, a translation lookaside buffer. The address translation hardware is coupled to the interconnect and is to provide a translation of a first address to a second address. The device is coupled to the first interconnect and the second interconnect and is to provide the first address to the address translation hardware through the first interconnect. The translation lookaside buffer includes an entry to store the translation, which is to be provided to the translation lookaside buffer through the first interconnect by the address translation hardware. The device is to access a system memory through the second interconnect using the second address from the entry in the translation lookaside buffer. The second interconnect is in the only path between the device and the system memory.
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