Re: [Qemu-devel] [PATCH 00/13] target/arm/kvm: enable SVE in guests

[Peter Maydell]

On Mon, 13 May 2019 at 19:46, Richard Henderson
<address@hidden> wrote:
>
> On 5/12/19 1:36 AM, Andrew Jones wrote:
> >    CPU type | accel | sve-max-vq | sve-vls-map
> >    -------------------------------------------
> >  1)     max | tcg   |  $MAX_VQ   |  $VLS_MAP
> >  2)     max | kvm   |  $MAX_VQ   |  $VLS_MAP
> >  3)    host | kvm   |  N/A       |  $VLS_MAP
>
> This doesn't seem right.  Why is -cpu host not whatever the host supports?  It
> certainly has been so far.  I really don't see how -cpu max makes any sense 
> for
> kvm.

The point of '-cpu max' is that it works and gives you the
best thing QEMU can support regardless of what accelerator
is in use. This means that you don't need to do tedious
workarounds like "if KVM then -cpu host else -cpu somethingelse".

thanks
-- PMM