Avi,
We have addressed all of the comments, please apply.
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). Reworking EPT support to mesh cleanly with the current shadow paging
design per Avi's comments is a work-in-progress.
The current patches support multiple nested hypervisors, which can run
multiple guests. Only 64-bit nested hypervisors are supported. SMP is
supported. Additional patches for running Windows under nested KVM, and
Linux under nested VMware server, are currently running in the lab, and
will be sent as a follow-on patchset.
This patches were written by:
Orit Wasserman, oritw <at> il.ibm.com
Ben-Ami Yassor, benami <at> il.ibm.com
Abel Gordon, abelg <at> il.ibm.com
Muli Ben-Yehuda, muli <at> il.ibm.com
With contributions by:
Anthony Liguori, aliguori <at> us.ibm.com
Mike Day, mdday <at> us.ibm.com
This work was inspired by the nested SVM support by Alexander Graf and Joerg
Roedel.
Changes since v3:
Added support for 32-bit nested guests
Added support for multiple nested guests
Added support for multiple nested hypervisors
Implemented VMX instruction decoding
Implemented CR0.TS handling for nested
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