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

[Holger <Age_M@xxxxxx>]

Hi again,

actually I still have the Xen 3.0.4.1 version installed. But I have seen 
some ebuilds(using Gentoo) for xen 3.1
Will try to install, maybe today (having some minor network problems 
with e1000), but AMD-V in xen-3.0.4.1 looks quite fine.
We'll stay in touch
Greetz Age_M
> > -----Original Message-----
> > From: Holger [mailto:Age_M@xxxxxx] 
> > Sent: 07 June 2007 15:47
> > To: Petersson, Mats
> > Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> > Subject: Re: [Xen-users] Xen 3.0.4.1 AMD-V HVM
> >
> >
> > 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?
> >     
> Well, you shouldn't be able to use "PownerNow!" on a the new procesor
> with the old BIOS, but other than that, it shouldn't cause any noticable
> problems, unless there's some new bugs in the new processor that
> requires special fixes (and if there is, they are probably fairly
> obscure, so unlikely to occur on "average" code). 
>
> Can you try running Xen 3.1 with the newer BIOS and see if says "AMD-V
> locked by BIOS" when you attempt that? Unfortunately, the older version
> of Xen doesn't "know" the "lock" bit... 
>
> --
> Mats
>   
> > 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
> > > > > > > >
> > > > > > > > _______________________________________________
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> > > > > > > >
> > > > > > > >
> > > > > > > >     
> > > > > > > >         
> > > > > > > >             
> > > > > > > >                 
> > > > > > > _______________________________________________
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> > > > > > >       
> > > > > > >           
> > > > > > >               
> > > > > > _______________________________________________
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> > > > > >         
> > > > > >             
> > > > >   
> > > > >       
> > > > >           
> > > >     
> > > >         
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> > >
> > >   
> > >       
> >
> >     
>
>   

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