PCI Changes For Linux 5.7 Bring Error Disconnect Recover, P2P DMA For Skylake-E

Written by Michael Larabel in Hardware on 3 April 2020 at 02:17 PM EDT. 1 Comment
The PCI subsystem changes were sent out today for the ongoing Linux 5.7 kernel merge window.

The PCI highlights for the Linux 5.7 kernel include:

- Error Disconnect Recover (EDR) support for ACPI so firmware can report devices disconnected and try to recover when hitting an error.

- The peer-to-peer DMA support now whitelists Intel Skylake E root ports B/C/D.

- PCIe ASPM fixes.

- Better detection/reporting of 32 GT/s link speed.

- ACS quirks added for Zhaoxin x86 devices.

- Support for the Mobiveil GPEX Gen4 host.

- Support for Microsoft Hyper-V PCI protocol v1.3.

More details on the PCI changes via kernel pull request.
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