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System and method for authenticating an operating system to a central processing unit, providing the CPU/OS with secure storage, and authenticating the CPU/OS to a third party

  • US 7,174,457 B1
  • Filed: 03/10/1999
  • Issued: 02/06/2007
  • Est. Priority Date: 03/10/1999
  • Status: Expired due to Term
First Claim
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1. In a computer system having a central processing unit (CPU) and an operating system (OS), the CPU having a software identity register, a method for booting the operating system comprising:

  • executing an atomic operation to set an identity of the operating system into the software identity register of the CPU, wherein in an event that the atomic operation completes correctly, the software identity register contains the identity of the operating system and in an event that the atomic operation fails to complete correctly, the software identity register contains a value indicating that the atomic operation failed; and

    examining a content of the software identity register to verify the identity of the operating system.

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