Re: [PATCH] KVM: x86: VMX: Make smaller physical guest address space support user-configurable

From: Paolo Bonzini
Date: Wed Sep 23 2020 - 11:19:55 EST


On 23/09/20 16:32, Jim Mattson wrote:
> You don’t buy my argument that this should be per-VM, then? I’d bet that
> we have very close to 0 customers who care about emulating the reserved
> bits properly for 46-but wide VMs, but there may be someone out there
> using shadow paging in a nested kvm. 
>

I do buy it but I prefer not to have a released version of Linux where
this is enabled by default. I procrastinated hoping to cobble something
together but I didn't have time.

Paolo