Operational Defect Database
BugZero found this defect 943 days ago.
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Hewlett Packard Enterprise | a00118622en_us
Advisory: (Revision) Linux - With AMD Secure Memory Encryption Enabled, Pensando Distributed Services Platform Card May Not Have Available Network Interface and Uncorrectable PCI Express Errors Occur on Systems with AMD EPYC 7003 Series Processor
Last update date:
2/29/2024
Affected products:
Pensando Offerings
Affected releases:
No affected releases provided.
Fixed releases:
No fixed releases provided.
Description:
Info
Document Version Release Date Details 2 October 20, 2021 Updated scope. 1 September 29, 2021 Original document release On an HPE Gen10 Plus system configured with an AMD EPYC 7003 Series processors, after enabling AMD Secure Memory Encryption under the conditions below, a Pensando Distributed Services Platform card may report "Uncorrectable PCI Express errors" in the Integrated Management Log (IML) when the Linux driver is attempting to initialize. Linux will also report a Non-Maskable Interrupt (NMI) in dmesg. When this occurs, the network connectivity over the data port on the card will be unavailable. This occurs under the following conditions: Enable AMD Secure Memory Encryption in BIOS/Platform Configuration (RBSU) System Configuration->RBSU->Memory Options->Memory Encryption Options; default disabled Disable AMD I/O Virtualization Technology in BIOS/Platform Configuration (RBSU) System Configuration->RBSU->Virtualization options In Linux, add "mem_encrypt=on" to the kernel boot parameters
Scope
Any HPE Gen10 Plus system configured with an AMD EPYC 7003 Series processor and any Pensando Distributed Services Platform card.
Resolution
As a workaround, perform either of the following: To enable memory encryption, AMD recommends using the "Transparent Secure Memory Encryption" instead of "AMD Secure Memory Encryption." OR AMD I/O Virtualization can be enabled while Secure Memory Encryption (SME) is enabled. In this case, the kernel will disable IOMMU passthrough mode. On reboot after either of the above changes, the driver will load successfully and network connectivity will be restored. RECEIVE PROACTIVE UPDATES : Receive support alerts (such as Customer Advisories), as well as updates on drivers, software, firmware, and customer replaceable components, proactively in your e-mail through HPE Support Alerts. Sign up for Support Alerts at the following URL: Proactive Updates Subscription Form. NAVIGATION TIP: For hints on navigating HPE.com to locate the latest drivers, patches and other support software downloads, refer to the Navigation Tips document. SEARCH TIP: For hints on locating similar documents on HPE.com, refer to the Search Tips document
