Re: [Qemu-devel] [PATCH] target-i386: n270 can MOVBE

[Eduardo Habkost]

On Fri, Feb 08, 2013 at 02:59:25PM +0100, Paolo Bonzini wrote:
> Il 08/02/2013 14:44, Andreas Färber ha scritto:
> >>> >> Otherwise if someone can ack (or if you can point me to a manual), this
> >>> >> looks like a good bugfix for v1.4.
> >> > 
> >> > Right, I don't know what v1.4 is
> > It's the QEMU release that we're about to make in a week. :-)
> > http://wiki.qemu.org/Planning/1.4
> > 
> >> > but this still needs Richard's patchset
> >> > enabling MOVBE dynamic translation in qemu to go in first before
> >> > enabling MOVBE for the n270 model.
> > OK, so this goes through Richard's queue then, no objections.
> 
> I'm not sure I understand the relationship between QEMU CPUID bits and
> TCG/KVM, but perhaps this could go in 1.4 for KVM.
> 
> Does TCG have a way to mask bits that aren't supported in the
> translator?  For example AVX that is enabled by SandyBridge.

TCG mode automatically masks the bits not supported by TCG, see how
x86_cpu_realizefn() uses TCG_FEATURES/TCG_EXT_FEATURES/etc.

-- 
Eduardo