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

[Julien Grall <julien.grall@xxxxxxx>]

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/

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),$(HOSTARCH))
> +       CONFIG_CROSS_COMPILE := aarch64-linux-gnu-
> +endif
> +endif
> diff --git a/arch/arm/arm64/Makefile.uk b/arch/arm/arm64/Makefile.uk
> new file mode 100644
> index 0000000..f6aeeac
> --- /dev/null
> +++ b/arch/arm/arm64/Makefile.uk
> @@ -0,0 +1,43 @@
> +ASFLAGS  += -D__ARM_64__
> +CFLAGS   += -D__ARM_64__ -fms-extensions
> +CXXFLAGS += -D__ARM_64__ -fms-extensions
I would rather avoid to define yet another macro and re-use __aarch64__ 
defined by the aarch64 compiler.
> +
> +# GCC support -mcpu=native for arm64 from 6.0
> +ifeq ($(CONFIG_MARCH_ARM64_NATIVE),y)
> +$(eval $(call set_flags_if_gcc_version_ge,6,0,-mcpu=native))
> +endif
> +
> +# GCC support -mcpu=generic for arm64 from 4.8
> +ifeq ($(CONFIG_MARCH_ARM64_GENERIC),y)
> +$(eval $(call set_flags_if_gcc_version_ge,4,8,-march=armv8-a -mcpu=generic 
> -mtune=generic))
> +endif
> +
> +# GCC support -mcpu=cortex-a53 for arm64 from 4.9
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA53),y)
> +$(eval $(call set_flags_if_gcc_version_ge,4,9,-march=armv8-a -mcpu=cortex-a53 
> -mtune=cortex-a53))
> +endif
> +
> +# GCC support -mcpu=cortex-a57 for arm64 from 4.9
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA57),y)
> +$(eval $(call set_flags_if_gcc_version_ge,4,9,-march=armv8-a -mcpu=cortex-a57 
> -mtune=cortex-a57))
> +endif
> +
> +# GCC support -mcpu=cortex-a72 for arm64 from 5.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA72),y)
> +$(eval $(call set_flags_if_gcc_version_ge,5,0,-march=armv8-a -mcpu=cortex-a72 
> -mtune=cortex-a72))
> +endif
> +
> +# GCC support -mcpu=cortex-a73 for arm64 from 7.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA73),y)
> +$(eval $(call set_flags_if_gcc_version_ge,7,0,-march=armv8-a -mcpu=cortex-a73 
> -mtune=cortex-a73))
> +endif
> +
> +# GCC support -mcpu=cortex-a55 for arm64 from 8.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA55),y)
> +$(eval $(call set_flags_if_gcc_version_ge,8,0,-march=armv8.2-a 
> -mcpu=cortex-a55 -mtune=cortex-a55))
> +endif
> +
> +# GCC support -mcpu=cortex-a75 for arm64 from 8.0
> +ifeq ($(CONFIG_MARCH_ARM64_CORTEXA75),y)
> +$(eval $(call set_flags_if_gcc_version_ge,8,0,-march=armv8.2-a 
> -mcpu=cortex-a75 -mtune=cortex-a75))
> +endif
Cheers,

--
Julien Grall

--
Julien Grall

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