A security level tagging process to enable a user to associate a security level descriptor with a file, or a namespace directory where files and subdirectories inherit the security level descriptor from a parent directory. A parser can be used to automatically set a security level descriptor based on the contents of the file and/or attributes of files, or an administrator can associate a security level to a storage tier in the file system so that files are placed on the storage tiers with the matching security level as the file security level descriptor. The placement of the file on a storage tier depends on the data security level descriptor of the file and the security level of the storage so that files are placed on tiers where security level associated with the tier is greater than or equal to data security level of the file. Files can be migrated among storage tiers as their security levels may change.

Examples of the present disclosure describe systems and methods for sharing memory using a multi-ring shared, traversable and dynamic database. In aspects, the database may be synchronized and shared between multiple processes and/or operation mode protection rings of a system. The database may also be persisted to enable the management of information between hardware reboots and application sessions. The information stored in the database may be view independent, traversable, and resizable from various component views of the database. In some aspects, an event processor is additionally described. The event processor may use the database to allocate memory chunks of a shared heap to components/processes in one or more protection modes of the operating system.

In an information processing apparatus, a second central processing unit (CICU) uses an alteration detection program stored in a second memory to perform alteration detection on a program to be executed at a time of activation of a first CPU stored in a first memory. In a case where no alteration is detected in the program to be executed at the time of activation, the second CPU activates the first CPU using the program to be executed at the time of activation, and uses the activated first CPU to switch a program to be executed by the second CPU from the alteration detection program stored in the second memory to another processing program stored in the first memory.

A storage device includes a nonvolatile memory device that includes a first area, a second area, and a third area, and a controller that receives a write command and first data from a host device, preferentially writes the first data in the first area or the second area rather than the third area when the first data is associated with a turbo write, and writes the first data in the first area, the second area, or the third area when the first data is associated with a normal write. The controller moves second data between the first area, the second area, and the third area based on the policy received from the host device.

Data of a computer system can be secured from malware. During a Primary Operating System (PrimaryOS) run-time, the system determines if the computer system has been compromised and, if so, a Trusted Operating System (TrustedOS) is launched and assumes control of the hardware resources and the software resources of the computer system. The TrustedOS obtains a cryptographic key that is inaccessible to the PrimaryOS. The TrustedOS uses the cryptographic key to disable writing to a first portion of the storage media that includes the first set of logical block addresses. The PrimaryOS can incrementally back-up files to a second set of logical block addresses on a second portion of the storage media. Control of the hardware resources and the software resources is returned to the PrimaryOS.

An information handling system may include at least one processor and a memory. The information handling system may be configured to: host a container; execute a containerized application within the container, wherein the containerized application executes with privileges associated with a container-internal user; determine an association between the container-internal user and a host user associated with an operating system external to the container, wherein the determining is based on a cache that maintains a mapping between container-internal users and host users; and grant privileges to the containerized application based on the host user.

Methods and apparatus relating to zero-redundancy tag storage for bucketed allocators are described. In some embodiments, memory stores a memory page. The memory page includes a metadata page and a plurality of slots. The metadata page includes information corresponding to the plurality of slots. Decode circuitry decodes an instruction that includes a source operand. Execution circuitry executes the decoded instruction according to the source operand to load a first tag for a first slot of the plurality of slots in response to a memory access request directed at the first slot of the plurality of slots. The memory access request is allowed to proceed in response to a match between the first tag and a second tag of a pointer of the memory access request. The memory page stores a separate tag in proximity to each of the plurality of slots. Other embodiments are also disclosed and claimed.

Memory devices, systems including memory devices, and methods of operating memory devices are described, in which security measures may be implemented to control access to a fuse array (or other secure features) of the memory devices based on a secure access key. In some cases, a customer may define and store a user-defined access key in the fuse array. In other cases, a manufacturer of the memory device may define a manufacturer-defined access key (e.g., an access key based on fuse identification (FID), a secret access key), where a host device coupled with the memory device may obtain the manufacturer-defined access key according to certain protocols. The memory device may compare an access key included in a command directed to the memory device with either the user-defined access key or the manufacturer-defined access key to determine whether to permit or prohibit execution of the command based on the comparison.

Technologies disclosed herein provide cryptographic computing with cryptographically encoded pointers in multi-tenant environments. An example method comprises executing, by a trusted runtime, first instructions to generate a first address key for a private memory region in the memory and generate a first cryptographically encoded pointer to the private memory region in the memory. Generating the first cryptographically encoded pointer includes storing first context information associated with the private memory region in first bits of the first cryptographically encoded pointer and performing a cryptographic algorithm on a slice of a first linear address of the private memory region based, at least in part, on the first address key and a first tweak, the first tweak including the first context information. The method further includes permitting a first tenant in the multi-tenant environment to access the first address key and the first cryptographically encoded pointer to the private memory region.

Managing a cache includes parsing a physical address of a data block to determine a partition identifier (ID) and a tag; the partition ID compared against a partition table storing partition IDs. The partition table indicates at least one way partition and at least one set partition corresponding to the partition ID. Based on the partition table, a way partition is determined at which to store the data block, corresponding to a subset of columns of a cache and, based on the partition table and the tag, a set partition is determined at which to store the data block, corresponding to a subset of rows of the cache. A cache address is generated for the data block within a first region of the cache corresponding to an intersection of the way partition and the set partition. The data block is stored to the cache according to the cache address.