×

Managing accesses in a processor for isolated execution

  • US 7,089,418 B1
  • Filed: 03/31/2000
  • Issued: 08/08/2006
  • Est. Priority Date: 03/31/2000
  • Status: Expired due to Term
First Claim
Patent Images

1. A method comprising:

  • setting a first processor in a processing system to operate in an isolated execution mode, wherein the first processor supports (a) the isolated execution mode in a ring 0 operating mode, (b) a normal execution mode in the ring 0 operating mode, and (c) one or more higher ring operating modes;

    configuring the processing system to establish an isolated memory area in a memory of the processing system;

    detecting, at the first processor, a snoop transaction from a second processor; and

    disallowing the snoop transaction if (a) the snoop transaction requests access to an address that is cached by the first processor, (b) said address resides in the isolated memory area, and (c) the second processor is not set to operate in the isolated execution mode.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×