Re: [Xen-users] Xen 3.0.4.1 AMD-V HVM

[Holger <Age_M@xxxxxx>]

Hi there :-D

I don't believe it. your explanation brought me up to an idea!
if the g stepping cpu is the first cpu that support deactivation of 
AMD-V, what would happen if i use a bios version that doesn' recognize 
the G-step cpu :-p
voila.. bios version F2 activates the AMD-V feature -> I don't believe it.
I am just worrying what would happen to my system!? turning off 
speedstepping should do it, right?
Greetz Age_M

Petersson, Mats schrieb:
>  
>
>   
> > -----Original Message-----
> > From: Holger [mailto:Age_M@xxxxxx] 
> > Sent: 07 June 2007 14:59
> > To: Petersson, Mats
> > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] Xen 3.0.4.1 AMD-V HVM
> >
> >
> > Hi there again ;)
> >
> > Thanks for the reply, I think I get it now. So the only 
> > problem is the 
> > Mainboard. Do you think I am in a position to expect Gigabyte to fix 
> > this? Is it my right to say "This is an AM2 mainboard, so you have to 
> > build this feature into the bios?". I mean, virtualization is a key 
> > feature of AM2, right?
> >     
> Well, the KEY feature to processors that go into an AM2 is the ability
> to use DDR2 memory (which for the same performance is less expensive
> than DDR). It just so happens that we (AMD) choose to implement
> virtualization features into the same product upgrade cycle, so AM2 is
> an easy way to explain which processors have AMD-V or not.
>
> And the other key point here is that before Rev G, it was very difficult
> to disable AMD-V. In Rev G, it's one bit which is "sticky" (sticky means
> that it can't be reset without resetting the entire processor) in one
> register to disable AMD-V. 
>
> There is ABSOLUTELY no reason why this shouldn't be fixable in the BIOS.
>
>
>   
> > I really hope, that I don't have to buy a new mainboard again :-/
> >     
> Yes, I agree - although I would also say that if you bought the system
> with the intention of running AMD-V, then it would be fair to say that
> you should be able to take the motherboard back to the shop with a
> complaint that "it doesn't do what it should be able to" based on not
> being able to run AMD-V. [Being stricly legal, this is possibly beyond
> what the legal definition of "fit for purpose" covers if you didn't
> explicitly say to the retailer that you NEED the AMD-V feature - but I
> still would attempt to get a replacement it on these grounds before just
> buying a new motherboard]. 
>
> --
> Mats
>   
> > Thanks for your detailed explanations ;)
> > Greetz Holger
> >
> > Petersson, Mats schrieb:
> >     
> > >  
> > >
> > >   
> > >       
> > > > -----Original Message-----
> > > > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> > > > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Holger
> > > > Sent: 07 June 2007 14:30
> > > > To: xen-users@xxxxxxxxxxxxxxxxxxx
> > > > Subject: Re: [Xen-users] Xen 3.0.4.1 AMD-V HVM
> > > >
> > > > Hello Mats,
> > > >
> > > > I think I didn't really get the point in your statement.
> > > >
> > > > "please wait until the processors are available"
> > > >     
> > > >         
> > > This was in reference to the NEW processors that are not yet on the
> > > market - I can't really tell the general public about details of
> > > processors that are not yet available - at least not if I want to
> > > continue working for AMD... 
> > >   
> > >       
> > > > What processors are you talking about?! My AMD AM2 3600+ X2 (65nm) 
> > > > already has the AMD-V feature, right?!? And the Mainboard 
> > > >         
> > already has 
> >     
> > > > turned off this AMD-V feature, but I want to turn it ON 
> > > >         
> > again, right?!
> >     
> > > >     
> > > >         
> > > Aha! 65 nm is the Rev G model. I'm not sure, but I think 
> > >       
> > Rev G has the
> >     
> > > ability to disable AMD-V. But your BIOS really should have a way to
> > > ENABLE it if that's the case. [Most of the processors 
> > >       
> > currently on the
> >     
> > > market are Rev F - I only saw the first Rev G myself the other day,
> > > although I knew of their existance a long time ago]
> > >   
> > >       
> > > > So, what do I have to do to get HVM support? New CPU? New 
> > > > Mainboard?? Or 
> > > > should I completely switch to Intel Core2Duo?
> > > >     
> > > >         
> > > I'd suggest if Gigabyte isn't helping you (soon), you 
> > >       
> > should invest in a
> >     
> > > different motherbaord. 
> > >
> > >   
> > >       
> > > > I am completely irritated now :-p
> > > >     
> > > >         
> > > That wasn't my intention. Sorry for that. 
> > >
> > >   
> > >       
> > > > Greetz Holger
> > > >
> > > >
> > > >
> > > > Petersson, Mats wrote:
> > > >     
> > > >         
> > > > >  
> > > > >
> > > > >   
> > > > >       
> > > > >           
> > > > > > -----Original Message-----
> > > > > > From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> > > > > > [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of 
> > > > > > Christian Horn
> > > > > > Sent: 07 June 2007 09:14
> > > > > > To: Tony Hoyle
> > > > > > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > > > > > Subject: Re: [Xen-users] Xen 3.0.4.1 AMD-V HVM
> > > > > >
> > > > > > On Wed, Jun 06, 2007 at 08:02:38PM +0100, Tony Hoyle wrote:
> > > > > >     
> > > > > >         
> > > > > >             
> > > > > > > Yes.  Some manufacturers actually do this (especially 
> > > > > > >       
> > > > > > >           
> > > > > > >               
> > > > > > laptops). It's 
> > > > > >     
> > > > > >         
> > > > > >             
> > > > > > > possible a bios upgrade will reenable the option.
> > > > > > >       
> > > > > > >           
> > > > > > >               
> > > > > > Are you sure manufaturers can disable this for AM2-boards?
> > > > > > For intel its well known, but for AMD..
> > > > > >     
> > > > > >         
> > > > > >             
> > > > > I'll probably be told off for explaining this :-(
> > > > >
> > > > > Without going into "secrets", yes there is a way to "turn 
> > > > >           
> > off" AMD-V
> >     
> > > > > with the BIOS, and no, you can't ask for more details 
> > > > >       
> > > > >           
> > > > unless you have an
> > > >     
> > > >         
> > > > > NDA with AMD. It's also not possible to "re-enable it". 
> > > > >           
> > Although the
> >     
> > > > > BIOS _SHOULD_ allow the enabling/disabling to be "user 
> > > > >           
> > selectable".
> >     
> > > > > Future versions have a more well-documented way to do this. Again,
> > > > > unless you have an NDA with AMD, please wait until the 
> > > > >       
> > > > >           
> > > > processors are
> > > >     
> > > >         
> > > > > available, and there will be more details available to everyone.
> > > > >
> > > > > --
> > > > > Mats
> > > > >   
> > > > >       
> > > > >           
> > > > > > Christian
> > > > > >
> > > > > > _______________________________________________
> > > > > > Xen-users mailing list
> > > > > > Xen-users@xxxxxxxxxxxxxxxxxxx
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> > > > > >
> > > > > >
> > > > > >
> > > > > >     
> > > > > >         
> > > > > >             
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> > > > >           
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> > > >
> > > >
> > > >     
> > > >         
> > >   
> > >       
> >
> >     
>
>
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