Re: [Qemu-devel] [PATCH 0/2] tcg: Move TCG arch-specific initialization inside TCG code

[Eduardo Habkost]

On Fri, Dec 19, 2014 at 11:29:34AM +0100, Paolo Bonzini wrote:
> On 19/12/2014 10:47, Andreas Färber wrote:
> > How do you imagine this to work with multiple CPU types? From the looks
> > of it, this is for the target CPU, not the TCG architecture, so
> > tcg_arch_init() limits us to one implementation unlike now.
> > On the other hand it doesn't seem to be a per-CPU, i.e. CPUClass,
> > initialization either...
> 
> I think these should go in a separate CPUClass method that is called by
> tcg_exec_init (only for first_cpu now; later for all CPUs if each CPU
> gets a separate tcg_ctx).

configure_accelerator() (and tcg_exec_init()) is called before
machine_class->init() (where the CPUs are created).

I have work in progress that introduces arch-specific TYPE_ACCEL
subclasses. With this, we can then make tcg_arch_init() a TYPE_TCG_ACCEL
method that arch-specific TYPE_TCG_ACCEL subclasses can implement.

Is it already possible to build a QEMU binary with multiple TCG arches,
today?

-- 
Eduardo