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vSphere 8.0 Update 1c resolves Windows VBS performance & Hyper-V Generation 2 Nested VM running on AMD CPU

07.28.2023 by William Lam // 1 Comment

🆕 vSphere 8.0 Update 1c is now available! Includes support for TKr 1.25.7 🥳

📔RN
VC https://t.co/4y2s91PcKY
ESXi https://t.co/RYI0gz7vtf
TKr https://t.co/KiarKzkQs0

💿 DL
VC https://t.co/w0cyBErTiC
ESXi https://t.co/MuCPqieXY3

— William Lam (@lamw.bsky.social | @*protected email*) (@lamw) July 28, 2023

vSphere 8.0 Update 1c was just released and one of the resolved issues mentioned in the ESXi release notes is the following:

Nested virtual machines on AMD CPUs with operational systems such as Windows with virtualization-based security (VBS) might experience performance degradation, timeouts, or unresponsiveness due to an issue with the virtualization of AMD's Rapid Virtualization Indexing (RVI), also known as Nested Page Tables (NPT).

UPDATE (10/11/23) - This is also resolved in the ESXi 7.0 Update 3o release

There are two scenarios in which this fix resolves:

  1. Running Windows Server VM with a Hyper-V enabled Generation 2 VM (Nested Virtualization) on AMD CPU
  2. Running Windows Server VM with VBS Enabled (Non-Nested VM) on AMD CPU

[Read more...]

Categories // Nested Virtualization, vSphere 8.0 Tags // AMD, hyper-v, nested virtualization, VBS, vSphere 8.0 Update 1c

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William is Distinguished Platform Engineering Architect in the VMware Cloud Foundation (VCF) Division at Broadcom. His primary focus is helping customers and partners build, run and operate a modern Private Cloud using the VMware Cloud Foundation (VCF) platform.

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