1. Release Notes for Oracle Linux 9.4
  2. New Features and Changes
  3. Kernel and System Libraries

Kernel and System Libraries

The following notable features, enhancements, and changes apply to the Red Hat Compatible Kernel (RHCK) that's shipped with the current Oracle Linux 9 version.

Intel® SGX Available in RHCK

Intel® Software Guard Extensions (Intel® SGX) is an Intel® technology for protecting selected code and data from disclosure or modification.

Intel® SGX versions 1 and 2 are now available for use in Oracle Linux. Version 1 provides the Flexible Launch Control mechanism that enables SGX technology on platforms. Version 2 provides the Enclave Dynamic Memory Management (EDMM) functionality.

Notable functionality includes:

  • Update of EPCM permissions on regular enclave pages that belong to an initialized enclave.

  • Dynamically add regular enclave pages to an initialized enclave.

  • Expand an initialized enclave to accommodate more threads.

  • Remove regular pages and TCS pages from an initialized enclave.

IDXD Available in RHCK

The Intel® Data Streaming Accelerator Driver (IDXD) is an Intel® CPU integrated accelerator that shares a work queue with process address space ID (pasid) submission and shared virtual memory (SVM). From this release, IDXD is a supported feature in RHCK.