US 2026/0087007 A1 · PROCESSOR CIRCUITRY FOR PERFORMING A CACHE SEARCH BASED ON AN EXECUTION DOMAIN IDENTIFIER

Abstract

Techniques and mechanisms for a cache search to be performed based on a search parameter which identifies an execution domain. In an embodiment, a processor core comprises circuitry to facilitate the servicing of a memory access request by performing a cache search according to a domain-specific search mode. A criteria of the domain-specific search mode includes both an address parameter and a domain identifier parameter. The circuitry detects a mismatch condition for a given cache line where it is determined that—notwithstanding a correspondence between the address parameter and an address value for the cache line—the domain identifier parameter does not correspond to a domain identifier value which corresponds to that given cache line. In another embodiment, the processor core is operable to selectively search the cache according to either one of a domain-specific search mode or a domain-generic search mode.

Claims20

Dependent claims

An integrated circuit comprising:

a cache;
a repository to provide information comprising unique identifiers each for a different respective one of multiple execution domains;
and
a search unit, coupled to the cache and the repository, comprising circuitry to:
perform a search of the cache based on each of an address from an access request and a unique identifier of an execution domain which corresponds to the access request, wherein the circuitry to perform the search comprises the circuitry to:
perform an evaluation of metadata which corresponds to a line of the cache, wherein the metadata indicates both a location in a memory, and a domain identifier value;
based on the evaluation, generate a signal to indicate a failure of the search, wherein the failure is based on a condition in which:
the address corresponds to the location;
and
the unique identifier of the execution domain is different than the domain identifier value.

7 more elements

A system comprising:

a processor comprising:
a search unit comprising circuitry to perform a search of a cache based on each of an address from an access request and a unique identifier of an execution domain which corresponds to the access request, wherein the circuitry to perform the search comprises the circuitry to:
perform an evaluation of metadata which corresponds to a line of the cache, wherein the metadata indicates both a location in a memory, and a domain identifier value;
based on the evaluation, generate a signal to indicate a failure of the search, wherein the failure is based on a condition in which:
the address corresponds to the location;
and
the unique identifier of the execution domain is different than the domain identifier value;
and
a memory controller coupled to the processor, wherein the memory controller is to be coupled between the processor and the memory.

6 more elements

A method comprising:

receiving an access request comprising an address;
servicing the access request, comprising:
performing a search of a cache based on each of the address and a unique identifier of an execution domain which corresponds to the access request, wherein performing the search comprises:
performing an evaluation of metadata which corresponds to a line of the cache, wherein the metadata indicates both a location in a memory, and a domain identifier value;
based on the evaluation, generating a signal to indicate a failure of the search, wherein the failure is based on a condition in which:
the address corresponds to the location;
and
the unique identifier of the execution domain is different than the domain identifier value.

5 more elements

Dependencies are inferred from the claim text.

Processor circuitry for performing a cache search based on an execution domain identifier

Life of this patent

Processor circuitry for performing a cache search based on an execution domain identifier

Life of this patent

Abstract

Claims20