Unified kernel virtual address space for heterogeneous computing

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United States of America Patent

PATENT NO 11960410
APP PUB NO 20210081328A1
SERIAL NO

17105331

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Abstract

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Systems, apparatuses, and methods for implementing a unified kernel virtual address space for heterogeneous computing are disclosed. A system includes at least a first subsystem running a first kernel, an input/output memory management unit (IOMMU), and a second subsystem running a second kernel. In order to share a memory buffer between the two subsystems, the first subsystem allocates a block of memory in part of the system memory controlled by the first subsystem. A first mapping is created from a first logical address of the kernel address space of the first subsystem to the block of memory. Then, the IOMMU creates a second mapping to map the physical address of that block of memory from a second logical address of the kernel address space of the second subsystem. These mappings allow the first and second subsystems to share buffer pointers which reference the block of memory.

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Patent Owner(s)

Patent OwnerAddress
ATI TECHNOLOGIES ULCMARKHAM ONTARIO L3T 7X6

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Atkinson, William Lloyd Markham, CA 13 107
Chan, Benjamin Koon Pan Markham, CA 20 191
Kwong, Tung Chuen Markham, CA 26 194

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