Re: [Minios-devel] [UNIKRAFT PATCHv4 11/43] arch/arm64: Add processor optimization GCC flags for arm64

[Julien Grall <julien.grall@xxxxxxx>]

On 09/07/18 10:17, Wei Chen wrote:
> Hi Julien,
Hi,

> > -----Original Message-----
> > From: Julien Grall <julien.grall@xxxxxxx>
> > Sent: 2018年7月8日 5:59
> > To: Wei Chen <Wei.Chen@xxxxxxx>; minios-devel@xxxxxxxxxxxxxxxxxxxx;
> > simon.kuenzer@xxxxxxxxx
> > Cc: Kaly Xin <Kaly.Xin@xxxxxxx>; nd <nd@xxxxxxx>
> > Subject: Re: [Minios-devel] [UNIKRAFT PATCHv4 11/43] arch/arm64: Add processor
> > optimization GCC flags for arm64
> >
> > Hi Wei,
> >
> > On 07/06/2018 10:03 AM, Wei Chen wrote:
> > > We added serval arm64 CPU models in support list. In this patch,
> > s/serval/several/
> Oh, thanks again!
>
> > Cheers,
> >
> > > we check the GCC version and add optimization GCC flags for
> > > selected processor.
> > >
> > > Current supported arm64 CPU models:
> > > native, generic, cortex-a53, cortex-a57, cortex-a72, cortex-a73,
> > > cortex-a55 and cortex-a75.
> > >
> > > Signed-off-by: Wei Chen <Wei.Chen@xxxxxxx>
> > > ---
> > >    arch/arm/arm64/Compiler.uk |  6 ++++++
> > >    arch/arm/arm64/Makefile.uk | 43 ++++++++++++++++++++++++++++++++++++++
> > >    2 files changed, 49 insertions(+)
> > >    create mode 100644 arch/arm/arm64/Compiler.uk
> > >    create mode 100644 arch/arm/arm64/Makefile.uk
> > >
> > > diff --git a/arch/arm/arm64/Compiler.uk b/arch/arm/arm64/Compiler.uk
> > > new file mode 100644
> > > index 0000000..4572013
> > > --- /dev/null
> > > +++ b/arch/arm/arm64/Compiler.uk
> > > @@ -0,0 +1,6 @@
> > > +# set cross compile
> > > +ifeq ($(CONFIG_CROSS_COMPILE),)
> > > +ifneq ($(CONFIG_UK_ARCH),$(HOSTARCH))
> > > +       CONFIG_CROSS_COMPILE := aarch64-linux-gnu-
> > > +endif
> > > +endif
> > > diff --git a/arch/arm/arm64/Makefile.uk b/arch/arm/arm64/Makefile.uk
> > > new file mode 100644
> > > index 0000000..f6aeeac
> > > --- /dev/null
> > > +++ b/arch/arm/arm64/Makefile.uk
> > > @@ -0,0 +1,43 @@
> > > +ASFLAGS  += -D__ARM_64__
> > > +CFLAGS   += -D__ARM_64__ -fms-extensions
> > > +CXXFLAGS += -D__ARM_64__ -fms-extensions
> > I would rather avoid to define yet another macro and re-use __aarch64__
> > defined by the aarch64 compiler.
> It does make sense. But I am not sure if we keep __ARM_64__ here can improve
> the compatibility for other libraries. Because for internal libraries we can
> __aarch64__ uniformly. But for external libraries, we change them to __aarch64__
> Easily.
If other libraries are using __ARM_64__, then I would say go an fix your 
libraries :). But I would expect most of them to use what's the compiler 
provide.
Cheers,

--
Julien Grall

_______________________________________________
Minios-devel mailing list
Minios-devel@xxxxxxxxxxxxxxxxxxxx
https://lists.xenproject.org/mailman/listinfo/minios-devel