Re: [Qemu-devel] [PATCH] omit 3DNOW! CPUID bits from qemu64 CPU model

[Alexander Graf]

On 16.07.2009, at 14:49, Andre Przywara wrote:

> Since we recently do not disable 3DNOW! support anymore, we should
> avoid setting the bits in the default qemu64 CPU model to ease
> migration. TCG does not support it anyway and even AMD deprecates
> it's usage nowadays.

TCG does not implement it but it was enabled in the qemu64 type? That  
sounds like a serious bug people would have found before.

I really think we should try and keep the "qemu64" type (TCG  
capabilities) and the "kvm safe" type separate. IMHO the best scenario  
would be a -cpu "safe" type, used as default, that is the common  
dominator between KVM on VMX, KVM on SVM and TCG.

That would also make it easier to know where to put other fancy  
features like "SVM" :-).

Alex