Arm Announces Armv9 Architecture: New Security, AI, and Vector Extensions

Since the debut of Armv8 in October 2011, Arm has continuously evolved its instruction set architecture (ISA) to meet the demands of mobile, server, laptop, and desktop markets.

At the recent Vision Day event, Arm introduced the first details of the next‑generation Armv9 architecture, positioning it as the foundation for the next trillion‑chip era.

Armv9 retains AArch64 as its baseline ISA but adds significant extensions, focusing on three main pillars: security, artificial intelligence (AI), and improved vector/DSP functionality.

The security pillar introduces the Confidential Compute Architecture (CCA), which creates hardware‑isolated "realms" that are opaque to the operating system and hypervisor, reducing the trusted computing base and enabling secure execution of critical workloads.

AI support is emphasized through dedicated matrix‑multiplication instructions and the integration of SVE2, the successor to NEON, which offers scalable vector lengths from 128 b to 2048 b, simplifying software development across diverse hardware.

SVE2, first released in 2019, expands the SIMD instruction set to cover workloads previously limited to NEON, providing a unified programming model that can fully utilize future wide‑vector execution pipelines.

Memory Tagging Extensions (MTE), introduced with Armv8.5, continue to help mitigate buffer overflows and use‑after‑free bugs by tagging pointers at allocation and checking them on use.

Arm also shared its roadmap, projecting a 2.4× IPC improvement for upcoming X1‑class cores and outlining next‑generation mobile IPs (codenamed “Matterhorn” and “Makalu”) with an expected 30 % IPC gain.

Future GPU developments were hinted at, including Variable Rate Shading (VRS) and ray‑tracing capabilities for Mali GPUs, indicating a convergence of mobile and desktop graphics technologies.

Overall, Armv9 combines a fundamental ISA evolution with a comprehensive software ecosystem reset, laying the groundwork for the next decade of secure, AI‑ready, and high‑performance computing across all device categories.