Re: [PATCH kvm-unit-tests] arm64: TCG: Use max cpu type

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Jun 03, 2022 at 02:21:10PM +0200, Cornelia Huck wrote:
> On Fri, Jun 03 2022, Andrew Jones <drjones@xxxxxxxxxx> wrote:
> 
> > The max cpu type is a better default cpu type for running tests
> > with TCG as it provides the maximum possible feature set. Also,
> > the max cpu type was introduced in QEMU v2.12, so we should be
> > safe to switch to it at this point.
> >
> > There's also a 32-bit arm max cpu type, but we leave the default
> > as cortex-a15, because compilation requires we specify for which
> > processor we want to compile and there's no such thing as a 'max'.
> >
> > Signed-off-by: Andrew Jones <drjones@xxxxxxxxxx>
> > ---
> >  configure | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/configure b/configure
> > index 5b7daac3c6e8..1474dde2c70d 100755
> > --- a/configure
> > +++ b/configure
> > @@ -223,7 +223,7 @@ fi
> >  [ -z "$processor" ] && processor="$arch"
> >  
> >  if [ "$processor" = "arm64" ]; then
> > -    processor="cortex-a57"
> > +    processor="max"
> >  elif [ "$processor" = "arm" ]; then
> >      processor="cortex-a15"
> >  fi
> 
> This looks correct, but the "processor" usage is confusing, as it seems
> to cover two different things:
> 
> - what processor to compile for; this is what configure help claims
>   "processor" is used for, but it only seems to have that effect on
>   32-bit arm
> - which cpu model to use for tcg on 32-bit and 64-bit arm (other archs
>   don't seem to care)
> 
> So, I wonder whether it would be less confusing to drop setting
> "processor" for arm64, and set the cpu models for tcg in arm/run (if
> none have been specified)?
>

Good observation, Conny. So, I should probably leave configure alone,
cortex-a57 is a reasonable processor to compile for, max is based off
that. Then, I can select max in arm/run for both arm and arm64 tests
instead of using processor there.

Thanks,
drew




[Index of Archives]     [KVM ARM]     [KVM ia64]     [KVM ppc]     [Virtualization Tools]     [Spice Development]     [Libvirt]     [Libvirt Users]     [Linux USB Devel]     [Linux Audio Users]     [Yosemite Questions]     [Linux Kernel]     [Linux SCSI]     [XFree86]

  Powered by Linux