Re: Nested VMX support - kernel v1

[Avi Kivity <avi@redhat.com>]

On 09/02/2009 06:38 PM, oritw@il.ibm.com wrote:
> The following patches implement nested VMX support. The patches enable a guest
> to use the VMX APIs in order to run its own nested guest (i.e., enable running
> other hypervisors which use VMX under KVM). The current patches support running
> Linux under a nested KVM using shadow page table (with bypass_guest_pf
> disabled). SMP support was fixed.  Reworking EPT support to mesh cleanly with
> the current shadow paging design per Avi's comments is a work-in-progress.
>
> The current patches only support a single nested hypervisor, which can only run
> a single guest (multiple guests are work in progress). Only 64-bit nested
> hypervisors are supported.
>
> Additional patches for running Windows under nested KVM, and Linux under nested
> VMware server(!), are currently running in the lab. We are in the process of
> forward-porting those patches to -tip.
>
> This patches were written by:
>       Orit Wasserman, oritw@il.ibm.com
>       Ben-Ami Yassor, benami@il.ibm.com
>       Abel Gordon, abelg@il.ibm.com
>       Muli Ben-Yehuda, muli@il.ibm.com
>
> With contributions by:
>       Anthony Liguori, aliguori@us.ibm.com
>       Mike Day, mmday@us.ibm.com
>
> This work was inspired by the nested SVM support by Alexander Graf and Joerg
> Roedel.
> Changes since v1:
>       SMP support.
>       Split into 6 smaller patches.
>       Use nested_vmx structure for nested parameters.
>       Use Array for shadow VMCS offsets.
>    

Thanks for splitting, much easier to review.  As I come to understand 
the code, you'll get better reviews.

Patch 6 didn't make it to the list.

-- 
I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.