[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 00/13] Nested Virtualization: Overview
On Tuesday 30 November 2010 18:20:40 Bruce Edge wrote: > On Fri, Nov 12, 2010 at 10:39 AM, Christoph Egger > <Christoph.Egger@xxxxxxx<mailto:Christoph.Egger@xxxxxxx>> 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). > > > -- > ---to satisfy European Law for business letters: > Advanced Micro Devices GmbH > Einsteinring 24, 85609 Dornach b. Muenchen > Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd > Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen > Registergericht Muenchen, HRB Nr. 43632 > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx<mailto:Xen-devel@xxxxxxxxxxxxxxxxxxx> > http://lists.xensource.com/xen-devel > > > I'd like to ask a general question on nested virtualization. Can an L1 or > L>1 VM span multiple physical machines? I guess you mean virtual machines here. The answer is yes. > I'm guessing not from the pdf, > http://lists.xensource.com/archives/html/xen-devel/2010-04/pdfsVHwQIeZLB.pd >f, but I wanted to ask and confirm because if so, this would be a fantastic > way to segregate individual customer infrastructures in a cloud > environment. I do not consider the patch series production stable but I would be glad when you can help with testing. Christoph -- ---to satisfy European Law for business letters: Advanced Micro Devices GmbH Einsteinring 24, 85609 Dornach b. Muenchen Geschaeftsfuehrer: Alberto Bozzo, Andrew Bowd Sitz: Dornach, Gemeinde Aschheim, Landkreis Muenchen Registergericht Muenchen, HRB Nr. 43632 _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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