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Data transmission control method, key management method, configuration method and related devices

A technology for data transmission control and control devices, which is applied in the field of data security and can solve problems such as reducing the performance of encrypted virtual machines

Pending Publication Date: 2021-01-22
HYGON INFORMATION TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, DMA technology itself is introduced to avoid memory copying by the CPU, and the above-mentioned encrypted virtual machine rebound buffer mechanism requires the CPU to copy between ordinary memory and encrypted virtual machine memory. Frequent CPU memory copying greatly reduces Performance of Encrypted Virtual Machines

Method used

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  • Data transmission control method, key management method, configuration method and related devices
  • Data transmission control method, key management method, configuration method and related devices
  • Data transmission control method, key management method, configuration method and related devices

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Embodiment Construction

[0099] Computer peripherals refer to hardware devices connected outside the computer host, referred to as peripherals, which play the role of transmission, transfer and storage of data and information, and are an important part of the computer system.

[0100] As mentioned in the background section, at present, when dealing with DMA data interaction between encrypted virtual machines and peripherals, the Bounce Buffer mechanism is generally used, that is, the encrypted virtual machine allocates an additional piece of ordinary memory, that is, non-encrypted memory, as a temporary memory for DMA transmission. The DMA control device can directly access the ordinary memory, and the CPU copies data between the ordinary memory and the encrypted virtual machine memory.

[0101] In order to more clearly illustrate the working principle of the above-mentioned Bounce Buffer mechanism, the structure and data interaction process of a DMA transmission system will be described below.

[010...

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Abstract

Disclosed are a data transmission control method, key management method, configuration method and related devices. The data transmission control method is suitable for directly storing data transmission between an access control device and a first storage device controlled by the access control device and a peripheral, the first storage device is suitable for storing encrypted data of an encryptedvirtual machine, and the data transmission control method comprises the following steps: acquiring and storing key control information configured by the security processing device in response to thedirect storage access transmission initiation request; acquiring direct storage access transmission control information configured by the encrypted virtual machine; and acquiring corresponding key control information according to the direct storage access transmission control information, and controlling a key processing device to process data transmitted between the first storage device and the peripheral through the key control information according to a data transmission direction.

Description

technical field [0001] The embodiments of the present invention relate to the technical field of data security, and in particular to a data transmission control method, a key management method, a configuration method and related devices. Background technique [0002] The host operating system can run multiple virtual machines, and the host operating system can see the virtual machine memory at will. However, once the host is hijacked, there is a potential risk of leakage of guest virtual machine data before the emergence of memory encryption technology. Therefore, CPU chip manufacturers propose virtual machine encryption technology to make up for this risk. Specifically, on the CPU chip architecture, the memory encryption technology is introduced, and different virtual machines can be configured with their own encryption keys, but the host operating system does not know the memory encryption keys of the currently running virtual machines. There is no way to peek at custome...

Claims

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Application Information

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IPC IPC(8): G06F21/60
CPCG06F21/602G06F21/606
Inventor 姜新应志伟
Owner HYGON INFORMATION TECH CO LTD
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