Intel QuickAssist (QAT) C62x Lewisburg crypto and compression accelerators
Hardware crypto and compression offload engines built into Intel's C620-series "Lewisburg" server chipsets, launched in 2017 alongside Xeon Scalable platforms. They accelerate bulk encryption, public-key crypto, and zlib-style compression for workloads like VPN gateways, TLS termination, and storage appliances.
recommendation
Worth keeping but document its niche: the C62x family is now eight-year-old server silicon rather than current Intel hardware, yet upstream activity is healthy, with refactoring work and a device-specific shutdown fix landing as recently as May 2025. Intel still lists C62x among supported platforms for its current QAT Linux driver, so a sizeable installed base of Lewisburg-based servers continues to depend on it.
repository signals
sources
- git.kernel.org
The directory had a substantive upstream change on 2025-05-05 ('crypto: qat - refactor compression template logic'), indicating current maintenance rather than abandonment.
- git.kernel.org
The driver received a 2025 device-specific lifecycle fix ('add shutdown handler to qat_c62x'), which argues against deprecation/removal now.
- intel.com
Intel's 2025 compatibility guidance still lists the Intel C62x Chipset among platforms using the current Intel QAT Linux CE driver, showing an active supported installed base.
- intel.com
Intel ARK identifies C627 as a Lewisburg/C620-series server chipset launched in Q3'17 with integrated Intel QuickAssist Technology, supporting the assessment that this is older server hardware rather than a new 2025 platform.
codex reasoning notes (technical)
Local git history was obtained with shell `git log` (using safe.directory override); the two kernel.org commit URLs were then formed from those SHAs using canonical recall. Intel URLs were obtained via `web.search_query`. I also checked for lore-based removal signals first via `web.search_query` against `site:lore.kernel.org` for `qat_c62x`/directory terms and found no obvious removal discussion. Net: active upstream maintenance plus vendor support evidence suggests keep, but annotate as aging Lewisburg-era hardware with likely legacy/installed-base deployments rather than new mainstream 2025 sales.