@ Brad please see response from Intel on your follow up on questions: (a) affect Nvidia's use of DPC / EDR, depending upon how their firmware is negotiating the control with the operating system, and Response: As per spec, platforms should rely on _OSC to negotiate PCIe capabilities ownership. So for new platforms NVDIA should start using_OSC instead of HEST table.
(b) affect our existing installed base platforms that currently end up negotiating one way, but end up with a different result under this patch. E.g., the platform advertises "firmware first" in the ACPI HEST, but not via _OSC. I think it is more likely that server class systems will already do this correctly, and that embedded / "IoT" type devices are more likely to see an impact from this change. Response: For existing platforms, since they don't align with spec, recommendation is using pci quirks to create exception for their use cases. This is platform generic enhancement and can be tested on Intel platforms. There was a question also on Diagnostics: EDR related error messages: 1. "Failed to install notify handler" 2. "Firmware failed to locate DPC port" (Issue with 0x0D _DSM) 3. "This device doesn't support DPC" 4. "Invalid DPC trigger" EDR success messages: 1. "EDR event received" ( for receiving successful EDR event) 2. "device recovery successful" ( for successful recovery) -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1885030 Title: [Intel] Add Error Disconnect Recover support Status in intel: Won't Fix Status in linux package in Ubuntu: Incomplete Status in linux source package in Focal: Incomplete Status in linux source package in Groovy: Incomplete Bug description: As per the following PCIe spec ECNs, implement EDR support in Linux kernel and upstream it. https://members.pcisig.com/wg/PCI-SIG/document/14076 https://members.pcisig.com/wg/PCI-SIG/document/12888 Patchset (Merged 5.7 mainline): 894020fdd88c PCI/AER: Rationalize error status register clearing ac1c8e35a326 PCI/DPC: Add Error Disconnect Recover (EDR) support aea47413e7ce PCI/DPC: Expose dpc_process_error(), dpc_reset_link() for use by EDR 20e15e673b05 PCI/AER: Add pci_aer_raw_clear_status() to unconditionally clear Error Status 27005618178e PCI/DPC: Cache DPC capabilities in pci_init_capabilities() e8e5ff2aeec1 PCI/ERR: Return status of pcie_do_recovery() b6cf1a42f916 PCI/ERR: Remove service dependency in pcie_do_recovery() be06c1b42eea PCI/DPC: Move DPC data into struct pci_dev 6d2c89441571 PCI/ERR: Update error status after reset_link() b5dfbeacf748 PCI/ERR: Combine pci_channel_io_frozen cases To manage notifications about this bug go to: https://bugs.launchpad.net/intel/+bug/1885030/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
