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US 2014/0181461 A1Published application
Reporting access and dirty pages
AssigneeAdvanced Micro Devices, Inc.
InventorsAndrew Kegel, Thomas R. Woller
Life of this patent
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AssigneeAdvanced Micro Devices, Inc.
InventorsAndrew Kegel, Thomas R. Woller
Estimating the term…
A method and apparatus for reporting events into at least one event log are presented. An “access” event entry may be added to an event log stored in memory when a peripheral device accesses an address of a memory page described by a page table entry (PTE). A “dirty” event entry may be added to an event log stored in memory when a page writes to a memory page. The event log may reside in an input/output memory management unit (IOMMU) that includes a translation lookaside buffer (TLB). The IOMMU may report the event log entries to system memory. When there is no entry in the TLB and a direct memory access (DMA) read operation enters the IOMMU, a PTE may be loaded into the TLB after updating an access log to calculate an address. If the DMA operation is not a read operation, both dirty and access logs may be updated.
A method of reporting events into at least one event log, the method comprising:
Apparatus for reporting events into at least one event log, the apparatus comprising:
A computer-readable storage medium configured to store a set of instructions used for manufacturing a semiconductor device, wherein the semiconductor device comprises:
Dependencies are inferred from the claim text.