Re: [dpdk-dev] [PATCH v2 1/1] build: add Graviton2(arm64) meson configuration

[Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>]

Hello,
	IMO, Juraj's patch for meson build rework for Arm platforms will need some time. Keeping the RC2 deadline in mind, it makes sense to accept this patch and target Juraj's patch for 21.02.

Any opinions?

> -----Original Message-----
> From: Vimal Chungath <vcchunga@amazon.com>
> Sent: Tuesday, October 27, 2020 3:18 PM
> To: dev@dpdk.org
> Cc: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>; Dharmik
> Thakkar <Dharmik.Thakkar@arm.com>; alisaidi@amazon.com;
> bruce.richardson@intel.com; hemant.agrawal@nxp.com;
> jerinj@marvell.com; jerinjacobk@gmail.com; juraj.linkes@pantheon.tech;
> nd <nd@arm.com>; thomas@monjalon.net
> Subject: [PATCH v2 1/1] build: add Graviton2(arm64) meson configuration
> 
> Add meson build configuration for Graviton2 platform with 64-bit Arm
> Neoverse N1 cores. This patch makes the following changes to generic
> Neoverse N1 config:
> 
> 1. increase lcore limit to 64
> 2. increase memory support to 1TB
> 3. remove +crc from -march as that is default when setting armv8.2
> 
> For more information about Graviton2 platform, refer to:
> https://aws.amazon.com/ec2/graviton/
> 
> Signed-off-by: Vimal Chungath <vcchunga@amazon.com>
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>

> ---
>  config/arm/arm64_graviton2_linux_gcc | 17 +++++++++++++++++
>  config/arm/meson.build               | 12 +++++++++++-
>  2 files changed, 28 insertions(+), 1 deletion(-)  create mode 100644
> config/arm/arm64_graviton2_linux_gcc
> 
> diff --git a/config/arm/arm64_graviton2_linux_gcc
> b/config/arm/arm64_graviton2_linux_gcc
> new file mode 100644
> index 000000000..022e06303
> --- /dev/null
> +++ b/config/arm/arm64_graviton2_linux_gcc
> @@ -0,0 +1,17 @@
> +[binaries]
> +c = 'aarch64-linux-gnu-gcc'
> +cpp = 'aarch64-linux-gnu-cpp'
> +ar = 'aarch64-linux-gnu-gcc-ar'
> +strip = 'aarch64-linux-gnu-strip'
> +pkgconfig = 'aarch64-linux-gnu-pkg-config'
> +pcap-config = ''
> +
> +[host_machine]
> +system = 'linux'
> +cpu_family = 'aarch64'
> +cpu = 'armv8-a'
> +endian = 'little'
> +
> +[properties]
> +implementor_id = '0x41'
> +implementor_pn = '0xd0c'
> diff --git a/config/arm/meson.build b/config/arm/meson.build index
> b49203fa8..0e7124843 100644
> --- a/config/arm/meson.build
> +++ b/config/arm/meson.build
> @@ -86,6 +86,16 @@ flags_octeontx2_extra = [
>  	['RTE_ARM_FEATURE_ATOMICS', true],
>  	['RTE_EAL_IGB_UIO', false],
>  	['RTE_USE_C11_MEM_MODEL', true]]
> +flags_n1generic_extra = [
> +	['RTE_MACHINE', '"neoverse-n1"'],
> +	['RTE_MAX_LCORE', 64],
> +	['RTE_CACHE_LINE_SIZE', 64],
> +	['RTE_ARM_FEATURE_ATOMICS', true],
> +	['RTE_USE_C11_MEM_MODEL', true],
> +	['RTE_MAX_MEM_MB', 1048576],
> +	['RTE_MAX_NUMA_NODES', 1],
> +	['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
> +	['RTE_LIBRTE_VHOST_NUMA', false]]
> 
>  machine_args_generic = [
>  	['default', ['-march=armv8-a+crc', '-moutline-atomics']], @@ -97,7
> +107,7 @@ machine_args_generic = [
>  	['0xd09', ['-mcpu=cortex-a73']],
>  	['0xd0a', ['-mcpu=cortex-a75']],
>  	['0xd0b', ['-mcpu=cortex-a76']],
> -	['0xd0c', ['-march=armv8.2-a+crc+crypto', '-mcpu=neoverse-n1'],
> flags_n1sdp_extra]]
> +	['0xd0c', ['-march=armv8.2-a+crypto', '-mcpu=neoverse-n1'],
> +flags_n1generic_extra]]
> 
>  machine_args_cavium = [
>  	['default', ['-march=armv8-a+crc+crypto','-mcpu=thunderx']],
> --
> 2.16.6