US 12,141,055 B2
Global virtual address space across operating system domains
Bryan Hornung, Plano, TX (US); and Patrick Estep, Rowlett, TX (US)
Assigned to Micron Technology, Inc., Boise, ID (US)
Filed by Micron Technology, Inc., Boise, ID (US)
Filed on Aug. 31, 2022, as Appl. No. 17/900,400.
Claims priority of provisional application 63/348,079, filed on Jun. 2, 2022.
Prior Publication US 2023/0393970 A1, Dec. 7, 2023
Int. Cl. G06F 12/02 (2006.01); G06F 12/1027 (2016.01)
CPC G06F 12/0223 (2013.01) [G06F 12/1027 (2013.01); G06F 2212/657 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A method comprising:
at a memory management unit (MMU) of a multi-processor, compute-near-memory system, performing operations comprising:
receiving a request for a virtual address from a process executing on a processor of the compute-near-memory system;
determining that the virtual address is within a global shared virtual address space;
responsive to determining that the virtual address is within the global shared virtual address space:
determining that a virtual device ID corresponding to the virtual address does not match a local virtual device ID of a device corresponding to the MMU;
responsive to determining that the virtual device ID corresponding to the virtual address does not match the local virtual device ID of the device corresponding to the MMU:
determining a globally unique range ID based upon the virtual address;
determining a base address and size for a region corresponding to the globally unique range ID;
determining a destination physical segment and destination physical device identifier using the base address and the virtual device ID;
constructing a physical address using the destination physical segment, the destination physical device identifier, size, and a portion of the virtual address; and
routing the request for the virtual address based upon the physical address, the physical address belonging to part of a single global physical address space of the compute system.