摘要:
Embodiments of an invention for generating multiple address space identifiers per virtual machine to switch between protected micro-contexts are disclosed. In one embodiment, an apparatus includes privileged mode logic, an interface, and memory management logic. The privileged mode logic is to transfer control of the processor among a plurality of virtual machines. The interface is to perform a transaction to fetch information from a memory. The memory management logic is to translate an untranslated address to a memory address. The memory management logic includes a storage location, a series of translation stages, determination logic, and a translation lookaside buffer. The storage location is to store an address of a data structure for the first translation stage. Each of the translation stages includes translation logic to find an entry in a data structure based on a portion of the untranslated address. Each entry is to store an address of a different data structure for the first translation stage, an address of a data structure for a successive translation stage, or the physical address. The determination logic is to determine whether an entry is storing an address of a different data structure for the first translation stage. The translation lookaside buffer is to store translations. Each translation lookaside buffer entry includes an address source identifiers. Each address source identifier is to identify a unique micro-context. Each address source identifier is based on a virtual partition identifier. At least two of the of virtual partition identifiers are associated with one of the virtual machines.
摘要:
Embodiments of an invention for generating multiple address space identifiers per virtual machine to switch between protected micro-contexts are disclosed. In one embodiment, a method includes receiving an instruction requiring an address translation; initiating, in response to receiving the instruction, a page walk from a page table pointed to by the contents of a page table pointer storage location; finding, during the page walk, a transition entry; storing the address translation and one of a plurality of address source identifiers in a translation lookaside buffer, the one of the plurality of address source identifiers based on one of a plurality of a virtual partition identifiers, at least two of the plurality of virtual partition identifiers associated with one of a plurality of virtual machines; and re-initiating the page walk.
摘要:
Embodiments of an invention for generating multiple address space identifiers per virtual machine to switch between protected micro-contexts are disclosed. In one embodiment, a method includes receiving an instruction requiring an address translation; initiating, in response to receiving the instruction, a page walk from a page table pointed to by the contents of a page table pointer storage location; finding, during the page walk, a transition entry; storing the address translation and one of a plurality of address source identifiers in a translation lookaside buffer, the one of the plurality of address source identifiers based on one of a plurality of a virtual partition identifiers, at least two of the plurality of virtual partition identifiers associated with one of a plurality of virtual machines; and re-initiating the page walk.
摘要:
Systems, apparatuses, and methods, and for seamlessly protecting memory regions to protect against hardware-based attacks are disclosed. In one embodiment, an apparatus includes a decoder, control logic, and cryptographic logic. The decoder is to decode a transaction between a processor and memory-mapped input/output space. The control logic is to redirect the transaction from the memory-mapped input/output space to a system memory. The cryptographic logic is to operate on data for the transaction.
摘要:
Disclosed is a method for restricting access of a first code of a plurality of codes and data of a first function from a second function. Thee method comprises calling the second function by the first function, addresses of the plurality of data may be stored in a stack page and colored in a first color (102). The method comprises performing access control check in a transition page for verifying whether the first function has permission to call the second function (104). Further the method comprises protecting the first code from the second function by coloring the data and/or addresses in a second color (106). Furthermore, the method comprises executing the second function by pushing addresses of the second function on the stack page, the addresses of the second function colored in a third color (108) and unprotecting the first code by coloring the addresses of the first code in the first color (110).
摘要:
Disclosed is a method for restricting access of a first code of a plurality of codes of a first function from a second function. The method comprises calling the second function by the first function, addresses of the plurality of codes are stored in a stack page and colored in a first color (102). The method comprises performing access control check in a transition page for verifying whether the first function has permission to call the second function (104). Further the method comprises protecting the first code from the second function by coloring the addresses in a second color (106). Furthermore, the method comprises executing the second function by pushing addresses of the second function on the stack page, the addresses of the second function colored in a third color (108) and unprotecting the first code by coloring the addresses of the first code in the first color (110).
摘要:
In accordance with disclosed embodiments, there are provided methods, systems, and apparatuses for implementing hardware of a virtualized processor based system detecting a specified type of memory access to an identified region of memory and in response to the detecting generating an interrupt for a virtual machine monitor (VMM) of the virtualized processor based system.
摘要:
Methods, apparatuses, articles, and systems for observing, by a virtual machine manager of a physical device, execution of a target process of a virtual machine of the physical device, including virtual addresses of the virtual machine referenced during the execution, are described herein. The virtual machine manager further determines whether the target process is executing in an expected manner based at least in part on the observed virtual address references and expected virtual address references.
摘要:
A system and process are described to enable at least one of a plurality of host agents executing on a system to update memory region types of a system memory, register the at least one host agent in a registry stored in system management memory, receive a system management interrupt (SMI) from one of the plurality of host agents to update a memory region type, determine if the host agent issuing the SMI is listed in the registry stored in system management memory, update the memory region in response to determining the host agent issuing the SMI is listed in the registry, and maintain the memory region type in response to determining the host agent issuing the SMI is not listed in the registry.