[Xen-devel] [PATCH 00/13] Nested Virtualization: Overview

[Christoph Egger <Christoph.Egger@xxxxxxx>]

Hi!

This patch series brings Nested Virtualization to Xen.
This is the third patch series. Improvements to the
previous patch submission:

- Incorporated feedback discussion with Keir, Tim and Eddie.

There might still be some nuances to fiddle with to make it
fit for VMX. Feedback from Intel is appreciated, therefore.

The patch series:

patch 01: add nestedhvm guest config option to the tools.
                  This is the only one patch touching the tools
patch 02: Add data structures for nested virtualization.
patch 03: add nestedhvm function hooks.
patch 04: The heart of nested virtualization.
patch 05: Allow switch to paged real mode during vmrun emulation.
                  Emulate cr0 and cr4 when guest does not intercept them
                  (i.e. Hyper-V/Windows7, KVM)
patch 06: When injecting an exception into nested guest, inject
                  #VMEXIT into the guest if intercepted.
patch 07: Allow guest to enable SVM in EFER.
patch 08: Handle interrupts (generic part).
patch 09: SVM specific implementation for nested virtualization.
patch 10: Handle interrupts (SVM specific).
patch 11: The piece of code that effectively turns on nested virtualization.
patch 12: Move dirty_vram from struct hvm_domain to struct p2m_domain.
                  This change is the first part from a larger not-yet-ready
                  change where the vram and log_dirty tracking is teached
                  to work on per p2m.
patch 13: 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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