64-Bit ARM Changes Already Sent In For The Linux 5.3 Kernel

Written by Michael Larabel in Arm on 8 July 2019 at 01:58 AM EDT. 1 Comment
Due to summer holidays, the 64-bit ARM (AArch64/ARM64) architecture changes were already sent in days ago for the Linux 5.3 kernel merge window.

With ARM64 for Linux 5.3 are a number of notable improvements. Among the additions for Linux 5.3 on the modern Arm front include:

- ARM64 system call emulation support.

- A minor performance optimization of keeping soft IRQs enabled when touching the FPSMID/SVE state.

- Exposing more ARMv8.5 features to user-space.

- Support for ARM Statistical Profiling Extensions (SPE) on ACPI platforms.

- DDR performance monitoring support for iMX8QXP platform.

- CONFIG_RANDOMIZE_BASE is now enabled by default for the ARM64 default kernel configuration, which is for enabling KASLR by default.

The complete list of changes can be found via this pull request.
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Michael Larabel is the principal author of Phoronix.com and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via MichaelLarabel.com.

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