Is there a test to see whether a particular computer supports hardware virtualization. Ivan. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
Often the BIOS will have a enable/disable for the VT instructions. -----Original Message----- From: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Ivan Avery Frey Sent: Monday, July 10, 2006 6:24 PM To: xen-users Subject: [Xen-users] Hardware Virtualization Is there a test to see whether a particular computer supports hardware virtualization. Ivan. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
To see if your intel cpu supports hardware virtualization, you can examine /proc/cpuinfo and look for vmx under the flags section. -----Original Message----- From: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of McFadden, Gordon Sent: Monday, July 10, 2006 9:26 PM To: Ivan Avery Frey; xen-users Subject: RE: [Xen-users] Hardware Virtualization Often the BIOS will have a enable/disable for the VT instructions. -----Original Message----- From: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of Ivan Avery Frey Sent: Monday, July 10, 2006 6:24 PM To: xen-users Subject: [Xen-users] Hardware Virtualization Is there a test to see whether a particular computer supports hardware virtualization. Ivan. _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 7/11/06, Ivan Avery Frey <ivan.frey@utoronto.ca> wrote:> Is there a test to see whether a particular computer supports hardware > virtualization. >Pre- or Post-buy? Pre: see the xen wiki, many posts on this mailing list, the xen download page with some hardware listed, ask your dealer for vt enabled hardware. Admittedly, it''s still hard, the solution with the dealer is the best one, so you can just give it back in case it doesn''t work. Post: xen test and demo cd (look vor VMX ON done in xm dmesg) And, don''t forget, it''s not only the cpu that needs vt support... Henning _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wednesday 12 July 2006 7:42 am, Henning Sprang wrote:> On 7/11/06, Ivan Avery Frey <ivan.frey@utoronto.ca> wrote: > > Is there a test to see whether a particular computer supports hardware > > virtualization. > > Pre- or Post-buy? > > Pre: see the xen wiki, many posts on this mailing list, the xen > download page with some hardware listed, ask your dealer for vt > enabled hardware. > Admittedly, it''s still hard, the solution with the dealer is the best > one, so you can just give it back in case it doesn''t work.It''s much simpler with AMD. All AMD AM2 processors, except for Sempron, support HVM. -- James Oakley Engineering - SolutionInc Ltd. joakley@solutioninc.com http://www.solutioninc.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 7/12/06, James Oakley <joakley@solutioninc.com> wrote:> [...] > It''s much simpler with AMD. All AMD AM2 processors, except for Sempron, > support HVM. >Really? At least with Intel, just knowing that you have a VT CPU doesn''t mean you can actually use that feature and I''d be surprised if that wouldn''t count for AMD. I ran into that trap myself. I''d guess with AMD, also, the board must support it, must have "good" acpi tables ( I don''t know too much about that, I am kernel hacker, but i know processes between OS and Hardware fail because of that), and probably generally be designed quite standard-conform. And I guess there are quite some that aren''t. (BTW: I have no problem buying amd, just when I needed a VT Notebook, non amd''s where available yet, so I have intel currently) Henning _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> [...] > I''d guess with AMD, also, the board must support it, must have "good" > acpi tables ( I don''t know too much about that, I am kernel hacker,oops, I wanted to say "I am not a kernel hacker"... Should think more before I press send... Henning _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Wednesday 12 July 2006 3:10 pm, Henning Sprang wrote:> On 7/12/06, James Oakley <joakley@solutioninc.com> wrote: > > [...] > > It''s much simpler with AMD. All AMD AM2 processors, except for Sempron, > > support HVM. > > Really? > At least with Intel, just knowing that you have a VT CPU doesn''t mean > you can actually use that feature and I''d be surprised if that > wouldn''t count for AMD. I ran into that trap myself. > > I''d guess with AMD, also, the board must support it, must have "good" > acpi tables ( I don''t know too much about that, I am kernel hacker, > but i know processes between OS and Hardware fail because of that), > and probably generally be designed quite standard-conform. And I guess > there are quite some that aren''t.I just built a system specifically for Xen from what I could find locally: AM2 Athlon64 3200+ (The only single core AM2 in the city, apparently) ASUS M2NPV-VM motherboard There was no BIOS option for enabling/disabling the feature. It just worked and I have WinXP happily running as a domU. -- James Oakley Engineering - SolutionInc Ltd. joakley@solutioninc.com http://www.solutioninc.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On a related note, is there a simple way of checking if the Xen dom0 is using the VT extensions? Seems like it is possible that one could have a mis-configured Xen running on a processor that supports VT without actually using the VT. -----Original Message----- From: xen-users-bounces@lists.xensource.com [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of James Oakley Sent: Wednesday, July 12, 2006 3:26 PM To: xen-users@lists.xensource.com Subject: Re: [Xen-users] Hardware Virtualization On Wednesday 12 July 2006 3:10 pm, Henning Sprang wrote:> On 7/12/06, James Oakley <joakley@solutioninc.com> wrote: > > [...] > > It''s much simpler with AMD. All AMD AM2 processors, except forSempron,> > support HVM. > > Really? > At least with Intel, just knowing that you have a VT CPU doesn''t mean > you can actually use that feature and I''d be surprised if that > wouldn''t count for AMD. I ran into that trap myself. > > I''d guess with AMD, also, the board must support it, must have "good" > acpi tables ( I don''t know too much about that, I am kernel hacker, > but i know processes between OS and Hardware fail because of that), > and probably generally be designed quite standard-conform. And I guess > there are quite some that aren''t.I just built a system specifically for Xen from what I could find locally: AM2 Athlon64 3200+ (The only single core AM2 in the city, apparently) ASUS M2NPV-VM motherboard There was no BIOS option for enabling/disabling the feature. It just worked and I have WinXP happily running as a domU. -- James Oakley Engineering - SolutionInc Ltd. joakley@solutioninc.com http://www.solutioninc.com _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
What AMD motherboards for AM2 have the option of turning VT on/off? Thanks, Dave Feustel --9B095B5ADSN=_01C68A6672788A7C0002CDD8webmail.xensourc-- _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On 7/13/06, McFadden, Gordon <gordon_mcfadden@intel.com> wrote:> > On a related note, is there a simple way of checking if the Xen dom0 is > using the VT extensions? Seems like it is possible that one could have > a mis-configured Xen running on a processor that supports VT without > actually using the VT.That''s what I said about "post buy" When you boot the demo cd, and "xm dmesg" shows "VMXON DONE" you have hardware that fully supports it, and xen is built with hvm support (which is true anyway for xen 3.0.2 binaries from xensource). Still, with 3.0.2 some people experience freezes which go away when using tesing/unstable sources. So, as I said, _for now_ it is some more to it than just buy a specific processor model. Looks like that will improve in the future. Henning _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of > dfeustel@mindspring.com > Sent: 13 July 2006 00:50 > To: xen-users@lists.xensource.com > Subject: RE: [Xen-users] Hardware Virtualization > > What AMD motherboards for AM2 have the option of > turning VT on/off?It is theoretically possible to "hide" the fact that the processor supports AMD-V (SVM), but it''s not going to actually disable the feature, just make CPUID not publish it... Which could be used in a BIOS as a disable feature, as any well-behaved software should check CPUID before using non-standard CPU-features. AMD doesn''t have VT - that''s the Intel term... Can''t have the same name for the same functionalite ;-) -- Mats> > Thanks, > Dave Feustel > > > --9B095B5ADSN=_01C68A6672788A7C0002CDD8webmail.xensourc-- > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
> -----Original Message----- > From: xen-users-bounces@lists.xensource.com > [mailto:xen-users-bounces@lists.xensource.com] On Behalf Of > Henning Sprang > Sent: 12 July 2006 19:11 > To: xen-users@lists.xensource.com > Subject: Re: [Xen-users] Hardware Virtualization > > On 7/12/06, James Oakley <joakley@solutioninc.com> wrote: > > [...] > > It''s much simpler with AMD. All AMD AM2 processors, except > for Sempron, > > support HVM. > > > > Really? > At least with Intel, just knowing that you have a VT CPU doesn''t mean > you can actually use that feature and I''d be surprised if that > wouldn''t count for AMD. I ran into that trap myself. > > I''d guess with AMD, also, the board must support it, must have "good" > acpi tables ( I don''t know too much about that, I am kernel hacker, > but i know processes between OS and Hardware fail because of that), > and probably generally be designed quite standard-conform. And I guess > there are quite some that aren''t.Since all the SVM processors are in a new socket, it''s pretty sure that the BIOS is compatible with the processor, since this is the first generation processor for the new socket. Obviously, this doesn''t take into account buggy or broken BIOS''s, or other bugs that may happen, but there''s no "designwork" needed to make AMD Virtualization work, there''s no bits to enable, and no reason why it shouldn''t "just work". This doesn''t necessarily mean that no-one will ever find a combination of processor and board that won''t work, but since it''s nothing actually needed to be done in the BIOS, it''s not particularly difficult to implement, so most BIOS-writers should be able to get it working... ;-) -- Mats> > > (BTW: I have no problem buying amd, just when I needed a VT Notebook, > non amd''s where available yet, so I have intel currently) > > Henning > > _______________________________________________ > Xen-users mailing list > Xen-users@lists.xensource.com > http://lists.xensource.com/xen-users > > >_______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users