[PATCH 0/5] Backport ARM64 VHE boot fixes to 6.6.y

Greg KH gregkh at linuxfoundation.org
Wed Jul 1 23:16:05 PDT 2026


On Wed, Jul 01, 2026 at 08:43:37PM +0000, Colton Lewis wrote:
> This series backports VHE CPU boot fixes to the 6.6.y stable branch.
> 
> These fixes are already present in the 6.12.y stable branch (and
> newer), but are missing in 6.6.y. They are required to enable booting
> L1 guests with nested virtualization enabled (kvm-arm.mode=nested).
> 
> Without these patches, a 6.6.y guest boots with HCR_EL2.E2H
> incorrectly configured (because it misses VHE-only detection or early
> initialization), causing early boot hangs/trap loops.

Why is this needed for 6.6.y?  Why not just use 6.12.y and newer for
systems that require this new feature?  What is preventing that from
happening?

thanks,

greg k-h



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