Hi men, I installed a HVM guest on Xen. And the results of ''cat /proc/cpuinfo'' are different on Dom0 and DomU(HVM). The CPU mode is right on both: model name : Intel(R) Core(TM)2 Quad CPU Q9300 @ 2.50GHz However, on Dom0 ''flags'' contains ''vmx'', which is the key of HVM, but on DomU, it doesn''e contains ''vmx''. Does it mean that HVM DomU dose not support ''vmx'', so we can''t install another Xen on HVM DomU? I want to know the reason why the DomU didnot have ''vmx'': 1. Intel VT doesn''t support ''vmx'' on DomU 2. Intel VT supports, but Xen doesn''t support (now) 3. Other reason Thanks, Wu _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
On 19/03/2009 08:15, "Wu Bingzheng" <wubingzheng@163.com> wrote:> I want to know the reason why the DomU didnot have ''vmx'': > 1. Intel VT doesn''t support ''vmx'' on DomU > 2. Intel VT supports, but Xen doesn''t support (now) > 3. Other reasonIt¹s not easy to support VMX in a domU. So we don¹t support it. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
>Does it mean that HVM DomU dose not support ''vmx'', so we can''t install >another Xen on HVM DomUIn theory, you can run Xen with dom0 and PV guests in hvm guest, but can''t install HVM guest in HVM guest because it depends on nested VT support in Xen. Xiantao _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
But, yes, it IS possible to run Xen in an HVM, but the Xen in the HVM is only able to run PV guests. (Note "possible" doesn''t mean that it will work on any given version of Xen.)> -----Original Message----- > From: Keir Fraser [mailto:keir.fraser@eu.citrix.com] > Sent: Thursday, March 19, 2009 2:35 AM > To: Wu Bingzheng; xen-devel@lists.xensource.com > Subject: Re: [Xen-devel] Run Xen on HVM guest? > > > On 19/03/2009 08:15, "Wu Bingzheng" <wubingzheng@163.com> wrote: > > > I want to know the reason why the DomU didnot have ''vmx'': > > 1. Intel VT doesn''t support ''vmx'' on DomU > > 2. Intel VT supports, but Xen doesn''t support (now) > > 3. Other reason > > It¹s not easy to support VMX in a domU. So we don¹t support it. > > -- Keir > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel