Re: [PATCH 4/7] KVM: vmx: Allow the guest to run with dirty debug registers

[Paolo Bonzini]

Il 10/03/2014 13:17, Radim KrÄmÃÅ ha scritto:
> > > I considered this, but decided that it's unlikely for emulation to
> > > be faster than hardware---especially on those AMD CPUs that lack
> > > decode assists (and it's good for VMX and SVM code to look as
> > > similar as possible).
> I meant to move it before the block that exits if there is the
> 'exception on access' bit set in cr7, so we wouldn't exit again right
> away on the actual access, which is quite likely.
> (Exiting without emulation was a great move.)

Ah yes, for the GD bit.  I don't know, it's quite unlikely that anyone 
will use it...  It's a feeble attempt at allowing virtualization of the 
debug registers without VMX.

Paolo
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