Private bug reported:
PCIe Gen6 introduces a significant advancement in high-speed
interconnect technology by doubling the data rate to 64 GT/s per lane
and adopting new signaling and encoding mechanisms such as PAM4 (Pulse
Amplitude Modulation-4) and FLIT-based data transfer. These changes are
essential to meet the increasing bandwidth demands of next-generation
workloads including AI/ML, high-performance computing, and high-speed
storage/networking.
Feature Request:
Requested details to be enabled on OS:
Enable PCIe Gen6 (64 GT/s) link support in kernel PCI subsystem.
Add support for FLIT-based encoding/decoding awareness in PCIe stack.
Enhance PCIe Advanced Error Reporting (AER) to handle FEC and CRC events.
Update drivers (NVMe, NIC, GPU/accelerators) for Gen6 compatibility and
performance tuning.
Ensure compatibility with PCIe Gen6 retimers/redrivers and link training
sequences
Validate backward compatibility with Gen5/Gen4 devices.
Enable firmware (BIOS/UEFI) integration for Gen6 link training and capability
exposure.
Provide tools/logging support for debugging Gen6 link health and error
conditions.
Document configuration, tuning, and validation workflows for PCIe Gen6
platforms.
Business Justication:
- Enables next-generation high-bandwidth workloads (AI/ML, HPC, hyperscale
storage).
- Provides up to 2× bandwidth improvement over PCIe Gen5, improving system
performance.
- Enhances platform reliability with FEC and improved error handling
mechanisms.
- Ensures competitiveness with emerging server platforms adopting PCIe Gen6.
- Supports future-proof infrastructure for data centers and enterprise
deployments.
- Aligns with upcoming hardware from CPU and accelerator vendors.
References:
PCI-SIG PCIe 6.0 Specification
PCIe Gen6 Architecture Overview (PAM4, FLIT, FEC)
Linux Kernel PCI Subsystem Documentation
NVMe and PCIe Gen6 Ecosystem Whitepapers
** Affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Information type changed from Public to Private
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https://bugs.launchpad.net/bugs/2146637
Title:
Request for PCIe Gen6 (64 GT/s) Support
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