TECHNIQUE FOR HANDLING REQUEST TRANSFERS FROM A PERIPHERAL DEVICE IN A COMMUNICATION NETWORK
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United States of America Patent
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Issued Date -
Jun 27, 2024
app pub date -
Mar 24, 2022
filing date -
May 10, 2021
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Abstract
A host device (10) provides a plurality of virtual machines (54) executing one or more processes (60, 62, 64, 66). A peripheral device (30) performs tasks on behalf of the host and is coupled to it via a communication network (20). The peripheral provides a plurality of virtual peripheral devices (34), each allocated to one of the virtual machines. Address translation circuitry (75) in the host performs two-stage address translation. When accessing a memory (40) via the host, the peripheral requests a transfer with a specified address and associated metadata providing a source identifier field, a first address translation control field and a second address translation control field. The first address translation control field controls any first stage address translation and depends on the process. The second address translation control field controls any second stage address translation required and depends on the virtual machine associated with the specified address.
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