[PATCH 0/15] Nested Virtualization: Overview

[Christoph Egger <Christoph.Egger@amd.com>]

Hi!

This patch series brings Nested Virtualization to Xen.
This is the second patch series with a lot of improvements
and fixes thanks to Tim Deegan's review.

The patch series:

patch 01: add nestedhvm guest config option to the tools.
                  This is the only one patch touching the tools
patch 02: change local_event_delivery_* to take vcpu argument.
                  This prevents spurios xen crashes on guest shutdown/destroy
                  with nestedhvm enabled.
patch 03: Add data structures for nested virtualization.
patch 04: add nestedhvm function hooks, described in XenNestedHVM.pdf
patch 05: The heart of nested virtualization.
patch 06: Allow switch to paged real mode during vmrun emulation.
                  Emulate cr0 and cr4 when guest does not intercept them
                  (i.e. Hyper-V/Windows7)
patch 07: Allow guest to enable SVM in EFER
patch 08: Propagate SVM cpuid feature bits to guest
patch 09: Emulate MSRs needed for nested virtualization
patch 10: Handle interrupts (generic part)
patch 11: SVM specific implementation for nested virtualization
patch 12: Handle interrupts (SVM specific)
patch 13: The piece of code that effectively turns nested virtualization on.
                  Use HVM_PARAM_* this time.
patch 14: Change p2m infrastructure to operate with per-p2m instead
                  of per-domain. Combined with patch 15, this allows to run
                  nested guest with hap-on-hap.
patch 15: Handle nested pagefault to enable hap-on-hap and handle
                  nested guest page-table-walks to emulate instructions
                  the guest does not intercept (i.e. WBINVD with Windows 7).


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