Intel Corporation

Tahoe Research, Ltd.

Kirk S Yap

Vinodh Gopal

Gilbert M Wolrich

Wajdi K Feghali

James D Guilford

Sean M Gulley

Martin Guy Dixon

Siddhartha Chhabra

Sudhir K Satpathy

Simon N Peffers

David M Durham

David J Harriman

Erdinc Ozturk

Daniel Cutter

Baiju V Patel

Raghunandan Makaram

Sanu K Mathew

Uday R Savagaonkar

Men Long

Eugene M Kishinevsky

Shay Gueron

Yogesh Bansal

Robert P Ottavi

Stephanie L Hirnak

Makaram Raghunandan

Jawad Basit Khan

Santosh Ghosh

Rajat Agarwal

George Vergis

Ioannis T Schoinas

Bill Nale

Alpa T Narendra Trivedi

Srinivas Chennupaty

Ishwar Agarwal

Bradley A Burres

Robert S Chappell

William C Hasenplaugh

Sorin Iacobovici

Jacob Doweck

Sreejit Chakravarty

Brent Ralph Boswell

Amy L Santoni

Olivia Wu

Michael Neve De Mevergnies

Gunnar Gaubatz

Daniel G Borkowski

Vinit Mathew Abraham

Nitish Paliwal

Ramasubramanian Rajamani

George Powley

Neel Piyush Shah

John J Vranich

Oscar Mendoza

Bryan J Gran

Tanmoy Kar

Siva Prasad Gadey

Vindoh Gopal

Apparatus and method for detecting a constant data block are described herein. An apparatus embodiment includes compression circuitry to perform compression operations on a memory block; constant detection circuitry to, concurrently with performance of the compression operations on the memory block, determine that the memory block is a constant data block comprised of only repeat instances of a constant value; and controller circuitry to associate a first indication with the memory block based on the determination, the first indication usable for controlling whether to abort the compression operations or whether to discard a compressed memory block generated from the compression operations.

Apparatus and method for constant detection during compress operations

Encryption interface technologies are described. A processor can include a system agent, an encryption interface, and a memory controller. The system agent can communicate data with a hardware functional block. The encryption interface can be coupled between the system agent and a memory controller. The encryption interface can receive a plaintext request from the system agent, encrypt the plaintext request to obtain an encrypted request, and communicate the encrypted request to the memory controller. The memory controller can communicate the encrypted request to a main memory of the computing device.

Encryption interface

Instructions and logic provide for a Single Instruction Multiple Data (SIMD) SM4 round slice operation. Embodiments of an instruction specify a first and a second source data operand set, and substitution function indicators, e.g. in an immediate operand. Embodiments of a processor may include encryption units, responsive to the first instruction, to: perform a slice of SM4-round exchanges on a portion of the first source data operand set with a corresponding keys from the second source data operand set in response to a substitution function indicator that indicates a first substitution function, perform a slice of SM4 key generations using another portion of the first source data operand set with corresponding constants from the second source data operand set in response to a substitution function indicator that indicates a second substitution function, and store a set of result elements of the first instruction in a SIMD destination register.

Instructions and logic to provide SIMD SM4 cryptographic block cipher functionality

Techniques for real-time updating of encryption keys are disclosed. In the illustrative embodiment, an encrypted link is established between a local and remote processor over a point-to-point interconnect. The encrypted link is operated for some time until the encryption key should be updated. The local processor sends a key update message to the remote processor notifying the remote processor of the change. The remote processor prepares for the change and sends a key update confirmation message to the local processor. The local processor then sends a key switch message to the remote processor. The local processor pauses transmission of encrypted message while the remote processor completes use of the encrypted message. After a pause, the local processor continues sending encrypted messages with the updated encryption key.

Technologies for real-time updating of encryption keys

Systems, methods, and circuitries are disclosed for a per-process memory encryption system. At least one translation lookaside buffer (TLB) is configured to encode key identifiers for keys in one or more bits of either the virtual memory address or the physical address. The process state memory configured to store a first process key table for a first process that maps key identifiers to unique keys and a second process key table that maps the key identifiers to different unique keys. The active process key table memory configured to store an active key table. In response to a request for data corresponding to a virtual memory address, the at least one TLB is configured to provide a key identifier for the data to the active process key table to cause the active process key table to return the unique key mapped to the key identifier.

Process-based multi-key total memory encryption

In one embodiment, an apparatus includes: an integrity circuit to receive data and generate a protection code based at least in part on the data; a cryptographic circuit coupled to the integrity circuit to encrypt the data into encrypted data and encrypt the protection code into an encrypted protection code; a message authentication code (MAC) circuit coupled to the cryptographic circuit to compute a MAC comprising a tag using header information, the encrypted data, and the encrypted protection code; and an output circuit to send the header information, the encrypted data, and the tag to a receiver via a link. Other embodiments are described and claimed.

System, apparatus and method for providing protection against silent data corruption in a link

An apparatus of an aspect includes an encryption unit to receive unencrypted data. The encryption unit is to encrypt the unencrypted data to generate encrypted data. The apparatus also includes circuitry coupled with the encryption unit. The circuitry is to generate a first checksum for a copy of the unencrypted data, generate a second checksum for a copy of the encrypted data, and combine the first and second checksums to generate a first value.

Error resilient cryptographic units and methods

Apparatus and method for efficient compression block decoding using content-addressable structure for header processing. For example, one embodiment of an apparatus comprises: a header parser to extract a sequence of tokens and corresponding length values from a header of a compression block, the tokens and corresponding length values associated with a type of compression used to compress a payload of the compression block; and a content-addressable data structure builder to construct a content-addressable data structure based on the tokens and length values, the content-addressable data structure builder to write an entry in the content-addressable data structure comprising a length value and a count value, the count value indicating a number of times the length value was previously written to an entry in the content-addressable data structure.

Method and apparatus for efficient deflate decompression using content-addressable data structures

A lossless data compressor of an aspect includes a first lossless data compressor circuitry coupled to receive input data. The first lossless data compressor circuitry is to apply a first lossless data compression approach to compress the input data to generate intermediate compressed data. The apparatus also includes a second lossless data compressor circuitry coupled with the first lossless data compressor circuitry to receive the intermediate compressed data. The second lossless data compressor circuitry is to apply a second lossless data compression approach to compress at least some of the intermediate compressed data to generate compressed data. The second lossless data compression approach different than the first lossless data compression approach. Lossless data decompressors are also disclosed, as are methods of lossless data compression and decompression.

Apparatus and method for two-stage lossless data compression, and two-stage lossless data decompression

Instructions and logic to provide SIMD SM4 cryptographic block cipher

An apparatus and method are described for performing efficient Boolean operations in a pipelined processor which, in one embodiment, does not natively support three operand instructions. For example, in one embodiment, a processor comprises: a set of registers for storing packed operands; Boolean operation logic to execute a single instruction which uses three or more source operands packed in the set of registers, the Boolean operation logic to read at least three source operands and an immediate value to perform a Boolean operation on the three source operands, wherein the Boolean operation comprises: combining a bit read from each of the three operands to form an index to the immediate value, the index identifying a bit position within the immediate value; reading the bit from the identified bit position of the immediate value; and storing the bit from the identified bit position of the immediate value in a destination register.

Apparatus and method for executing Boolean functions via forming indexes to an immediate value from source register bits

A processor includes an instruction decoder to receive a first instruction to process a secure hash algorithm 2 (SHA-2) hash algorithm, the first instruction having a first operand associated with a first storage location to store a SHA-2 state and a second operand associated with a second storage location to store a plurality of messages and round constants. The processor further includes an execution unit coupled to the instruction decoder to perform one or more iterations of the SHA-2 hash algorithm on the SHA-2 state specified by the first operand and the plurality of messages and round constants specified by the second operand, in response to the first instruction.

Method and apparatus to process SHA-2 secure hashing algorithm

Disclosed embodiments relate to encrypting or decrypting confidential data with additional authentication data by an accelerator and a processor. In one example, a processor includes processor circuitry to compute a first hash of a first block of data stored in a memory, store the first hash in the memory, and generate an authentication tag based in part on a second hash. The processor further includes accelerator circuitry to obtain the first hash from the memory, decrypt a second block of data using the first hash, and compute the second hash based in part on the first hash and the second block of data.

Accelerator for encrypting or decrypting confidential data with additional authentication data

Apparatus, systems and methods for implementing delayed decompression schemes. As a burst of packets comprising compressed packets and uncompressed packets are received over an interconnect link, they are buffered in a receive buffer without decompression. Subsequently, the packets are forwarded from the receive buffer to a consumer such as processor core, with the compressed packets being decompressed prior to reaching the processor core. Under a first delayed decompression approach, packets are decompressed when they are read from the receive buffer in conjunction with forwarding the uncompressed packet (or uncompressed data contained therein) to the consumer. Under a second delayed decompression scheme, the packets are read from the receive buffer and forwarded to a decompressor using a first datapath width matching the width of the packets, decompressed, and then forwarded to the consumer using a second datapath width matching the width of the uncompressed data.

Delayed link compression scheme

Growing community of inventors

Framingham, MA, United States of America

Kirk S Yap