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NVMe Tiering with AMD Ryzen CPU workaround for VCF 9.0

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If you have an AMD Ryzen processor and you are planning on use the NVMe Tiering feature with either VMware vSphere Foundation (VVF) or VMware Cloud Foundation (VCF) 9.0, you will need to apply the following workaround for your VMs to properly boot.

Note: This workaround is only required on AMD Ryzen (Consumer) CPU with NVMe Tiering enabled and does not affect AMD EPYC, Intel Xeon or Intel  Core (Consumer) CPUs with our without NVMe Tiering.

On an AMD Ryzen CPU that has NVMe Tiering enabled, when powering on a VM, you might notice the operating system does not fully boot and the VM console may become unresponsive. After spending some time debugging with Engineering, it looks like there are some issues with specific AMD Ryzen CPU instructions that is causing the VM to behave this way when NVMe Tiering is enabled.

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Programmatically accessing the Broadcom Compatibility Guide (BCG)

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The Broadcom Compatibility Guide (formerly VMware Compatibility Guide) is where users would go to check hardware (new or existing) compatibility with VMware software.


There are a number of different compatibility guides that you can search through from CPU processors to servers to the various of I/O devices including accelerators and graphics cards. For users with a small number of hardware devices, search is pretty straight forward but if you have a variety of different hardware to check, the web interface may not be the quickest.

One thing that I was pleasantly surprised to learn was that the Broadcom Compatibility Guide (BCG) could easily be consumed programmatically, unlike the previous VMware Compatibility Guide (VCG) which had a different backend system.

While there is not an official BCG API, which would include documentation, support and backwards compatibility, users can interact with the BCG using the same API as the BCG web interface.

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Quick Tip - Validating Broadcom Download Token 

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As of last month, customers must generate a new download token from the Broadcom Support Portal (BSP) for in-product downloads of VMware software binaries (e.g. updates, security patches using SDDC Manager, vCenter Server, ESXi, etc.). The Broadcom download token must then be appended after the new product download base URI (e.g. https://dl.broadcom.com/TOKEN/...) and this will ensure you will be able to continue to download updates directly or indirectly (via network proxy) from within the products.

UPDATE (05/02/2025) - A new Broadcom KB (395322) has also just been published with additional endpoints for troubleshooting download tokens.

Note: For customers that have setup or are using an offline method to retrieve updates, there are no changes in your workflow, this is only for those pulling software update directly from Broadcom.

A Broadcom download token is scoped to a SiteID and depending on your organization you may have one or more SiteIDs and users can generate a unique download token for each SiteID. It is important to understand that a download token itself does not contain an expiration, while you can revoke an existing token, its validity is based on whether a given SiteID has an active entitlement for the particular VMware SKU that you are attempting to download.

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