公开(公告)号：US20190384722A1

公开(公告)日：2019-12-19

申请号：US16007027

申请日：2018-06-13

Applicant: Advanced Micro Devices, Inc.

Inventor： Arkaprava Basu ,  Michael LeBeane ,  Eric Van Tassell

IPC: G06F12/1036 ,  G06F12/1009 ,  G06F9/50 ,  G06F9/48 ,  G06F13/16 ,  G06F13/22

Abstract: A data processing system includes a memory, a group of input/output (I/O) devices, an input/output memory management unit (IOMMU). The IOMMU is connected to the memory and adapted to allocate a hardware resource from among a group of hardware resources to receive an address translation request for a memory access from an I/O device. The IOMMU detects address translation requests from the plurality of I/O devices. The IOMMU reorders the address translation requests such that an order of dispatching an address translation request is based on a policy associated with the I/O device that is requesting the memory access. The IOMMU selectively allocates a hardware resource to the input/output device, based on the policy that is associated with the I/O device in response to the reordering.

公开(公告)号：US11144473B2

公开(公告)日：2021-10-12

申请号：US16007027

申请日：2018-06-13

Applicant: Advanced Micro Devices, Inc.

Inventor： Arkaprava Basu ,  Michael LeBeane ,  Eric Van Tassell

IPC: G06F12/1036 ,  G06F12/1009 ,  G06F9/50 ,  G06F9/48 ,  G06F13/16 ,  G06F13/22

Abstract: A data processing system includes a memory, a group of input/output (I/O) devices, an input/output memory management unit (IOMMU). The IOMMU is connected to the memory and adapted to allocate a hardware resource from among a group of hardware resources to receive an address translation request for a memory access from an I/O device. The IOMMU detects address translation requests from the plurality of I/O devices. The IOMMU reorders the address translation requests such that an order of dispatching an address translation request is based on a policy associated with the I/O device that is requesting the memory access. The IOMMU selectively allocates a hardware resource to the input/output device, based on the policy that is associated with the I/O device in response to the reordering.