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xen-devel
Re: [Xen-devel] [PATCH 00/13] Nested Virtualization: Overview
Hi Christoph,
Thanks for these; I've commented on the individual patches, but mostly
the core nested hvm and nested svm looks like it's in good shape. The
nested HAP code still needs work based on the last review, though.
Ccing Eddie for his opinion on the common code (patches 1 to 8).
Cheers,
Tim.
At 18:39 +0000 on 12 Nov (1289587157), Christoph Egger wrote:
> Hi!
>
> 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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>
>
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> http://lists.xensource.com/xen-devel
--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd. (Company #02937203, SL9 0BG)
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