> This patch series brings Nested Virtualization to Xen.
> This is the sixth patch series. Improvements to the
> previous patch submission:
> - Move GIF definition into SVM
> - Move VMEXIT emulation into SVM
> - Introduce hooks for getting host/guest cr3 for use with hap-on-hap
> per proposal from Eddie Dong
> - Moved fields from struct nestedhvm into SVM
> - Renamed struct nestedhvm to struct nestedvcpu
> - Reworked VMRUN and VMEXIT emulation. It uses a defered emulation
> mechanism that makes interrupt handling more efficient and is closer
> to what VMX is doing
> - VMCB is peristent mapped. Only remap the VMCB when l1 guest
> changes the address.
> 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 only on AMD.
> 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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