WARNING - OLD ARCHIVES

This is an archived copy of the Xen.org mailing list, which we have preserved to ensure that existing links to archives are not broken. The live archive, which contains the latest emails, can be found at http://lists.xen.org/
   
 
 
Xen 
 
Home Products Support Community News
 
   
 

xen-devel

[Xen-devel] [PATCH 00/17][RFC] Nested virtualization for VMX

To: xen-devel@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-devel] [PATCH 00/17][RFC] Nested virtualization for VMX
From: Qing He <qing.he@xxxxxxxxx>
Date: Thu, 22 Apr 2010 17:41:12 +0800
Delivery-date: Thu, 22 Apr 2010 02:54:42 -0700
Envelope-to: www-data@xxxxxxxxxxxxxxxxxxx
List-help: <mailto:xen-devel-request@lists.xensource.com?subject=help>
List-id: Xen developer discussion <xen-devel.lists.xensource.com>
List-post: <mailto:xen-devel@lists.xensource.com>
List-subscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=subscribe>
List-unsubscribe: <http://lists.xensource.com/mailman/listinfo/xen-devel>, <mailto:xen-devel-request@lists.xensource.com?subject=unsubscribe>
Sender: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx
This patch set enables nested virtualization for VMX, That
is to allow a VMX guest (L1) to run other VMX guests (L2).

The patch can generally run on different configurations:
  - EPT-on-EPT, shadow-on-EPT, shadow-on-shadow
  - different 32/64 combination of L1 and L2
  - L1/L2 SMP

EPT-on-EPT is however, preferrable due to performance
advantage, I've tested the patch on a 64bit NHM L0,
against Xen cs.  21190. With EPT-on-EPT and a a kernel
build workload, L2 needs around 17% more time to complete.


Known problems:
  - L1/L2=64/64, shadow-on-shadow doesn't work as for now
  - On 21190, even without nested patchset, Xen as L1
    suffers a considerable booting lag, this phenomenon
    was not observed on my previous base, around cs.
    20200
  - multiple L2 in one L1 hasn't been tested


The patch list is as below, it contains 3 preparation
patches (01 -- 03), 11 generic patches (04 -- 14), 1 to
enable EPT-on-EPT (15), and 2 support patches (16, 17).

[PATCH 01/17] vmx: nest: fix CR4.VME in update_guest_cr
[PATCH 02/17] vmx: nest: rename host_vmcs
[PATCH 03/17] vmx: nest: wrapper for control update
[PATCH 04/17] vmx: nest: domain and vcpu flags
[PATCH 05/17] vmx: nest: nested control structure
[PATCH 06/17] vmx: nest: virtual vmcs layout
[PATCH 07/17] vmx: nest: handling VMX instruction exits
[PATCH 08/17] vmx: nest: L1 <-> L2 context switch
[PATCH 09/17] vmx: nest: interrupt
[PATCH 10/17] vmx: nest: VMExit handler in L2
[PATCH 11/17] vmx: nest: L2 tsc
[PATCH 12/17] vmx: nest: CR0.TS and #NM
[PATCH 13/17] vmx: nest: capability reporting MSRs
[PATCH 14/17] vmx: nest: enable virtual VMX
[PATCH 15/17] vmx: nest: virtual ept for nested
[PATCH 16/17] vmx: nest: hvmtrace for nested
[PATCH 17/17] tools: nest: allow enabling nesting

Thanks,
Qing He

_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel