Re: [Qemu-devel] [PATCH v5 10/12] hw/mips: malta: Add KVM support

[Paolo Bonzini]

Il 20/06/2014 11:10, Aurelien Jarno ha scritto:
> > My idea was to add a machines-specific option umkernel=on, and require it
> > in order to run KVM.  Later we can add umkernel=on support for TCG as well,
> > while umkernel=off with KVM requires virtualization extensions.
> >
> > The same option can disable pflash boot.
> >
> > What do you think?
>
> For what I understand the current KVM support in MIPS uses trap and
> emulate and thus doesn't need hardware support, just a recent kernel
> with the option enabled.

Yes, but work to support virtualization extensions is underway.  Patches 
were posted a few months ago.

> That's why I do wonder if there is a real point
> in supporting UM kernels in TCG mode.

Debugging, mainly.  It is sometimes useful to compare TCG with KVM on 
x86, and I suppose it could be the same on MIPS.

Paolo