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

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

<snip>

> >
> > 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?
> 
> I feel, Recent Juraj's changes looks in good shape, I think, once he fixes your
> review comment and sends the next version. We can test it and give the final
> reviewed by and merge it in RC2.
> IMO, Those changes are critical to adding a new platform when MIDR is the
> same value.
The main aim was to have the ability to build for a specified SoC. It is available for cross-builds, but not for native builds.

> 
> 
> >
> > > -----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
> >