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From: Ruifeng Wang <Ruifeng.Wang@arm.com>
To: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	"jerinj@marvell.com" <jerinj@marvell.com>,
	Jan Viktorin <viktorin@rehivetech.com>,
	Bruce Richardson <bruce.richardson@intel.com>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
	"vladimir.medvedkin@intel.com" <vladimir.medvedkin@intel.com>,
	"hemant.agrawal@nxp.com" <hemant.agrawal@nxp.com>,
	nd <nd@arm.com>, nd <nd@arm.com>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v2 5/5] config: add Arm Neoverse N2
Date: Mon, 11 Jan 2021 03:01:33 +0000
Message-ID: <VI1PR0802MB23511368787DAEBFCE61F9A19EAB0@VI1PR0802MB2351.eurprd08.prod.outlook.com> (raw)
In-Reply-To: <DBAPR08MB5814E4CAD8B104F00E57DB9698AE0@DBAPR08MB5814.eurprd08.prod.outlook.com>


> -----Original Message-----
> From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
> Sent: Saturday, January 9, 2021 7:58 AM
> To: Ruifeng Wang <Ruifeng.Wang@arm.com>; jerinj@marvell.com; Ruifeng
> Wang <Ruifeng.Wang@arm.com>; Jan Viktorin <viktorin@rehivetech.com>;
> Bruce Richardson <bruce.richardson@intel.com>
> Cc: dev@dpdk.org; vladimir.medvedkin@intel.com;
> hemant.agrawal@nxp.com; nd <nd@arm.com>; Honnappa Nagarahalli
> <Honnappa.Nagarahalli@arm.com>; nd <nd@arm.com>
> Subject: RE: [PATCH v2 5/5] config: add Arm Neoverse N2
> 
> + Juraj
> 
> Please note that this clashes with Juraj's patch for meson rework.

Yes. I didn't base it on the build options rework series.
I will rebase when that series got merged.
> 
> <snip>
> 
> >
> > Add Arm Neoverse N2 cpu support.
> >
> > Signed-off-by: Ruifeng Wang <ruifeng.wang@arm.com>
> > ---
> >  config/arm/arm64_n2_linux_gcc | 17 +++++++++++++++++
> >  config/arm/meson.build        | 11 ++++++++++-
> >  2 files changed, 27 insertions(+), 1 deletion(-)  create mode 100644
> > config/arm/arm64_n2_linux_gcc
> >
> > diff --git a/config/arm/arm64_n2_linux_gcc
> > b/config/arm/arm64_n2_linux_gcc new file mode 100644 index
> > 000000000..78f6f3e2b
> > --- /dev/null
> > +++ b/config/arm/arm64_n2_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 = '0xd49'
> > diff --git a/config/arm/meson.build b/config/arm/meson.build index
> > 42b4e43c7..58e0ae643 100644
> > --- a/config/arm/meson.build
> > +++ b/config/arm/meson.build
> > @@ -89,6 +89,14 @@ flags_n1generic_extra = [
> >  	['RTE_MAX_NUMA_NODES', 1],
> >  	['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
> >  	['RTE_LIBRTE_VHOST_NUMA', false]]
> > +flags_n2generic_extra = [
> > +	['RTE_MACHINE', '"neoverse-n2"'],
> > +	['RTE_MAX_LCORE', 64],
> > +	['RTE_CACHE_LINE_SIZE', 64],
> > +	['RTE_ARM_FEATURE_ATOMICS', true],
> > +	['RTE_USE_C11_MEM_MODEL', true],
> > +	['RTE_EAL_NUMA_AWARE_HUGEPAGES', false],
> > +	['RTE_LIBRTE_VHOST_NUMA', false]]
> Do we need a flag RTE_ARM_FEATURE_SVE?

I don't think extra flag is needed. We can rely on __ARM_FEATURE_SVE from compiler.
One scenario I can think of where RTE_ARM_FEATURE_SVE can be needed is, when we are
writing inline assembly with sve instructions and using compiler that has no sve support.
I'm not sure we will have sve inline assembly as C intrinsics are available.
> 
> >
> >  machine_args_generic = [
> >  	['default', ['-march=armv8-a+crc', '-moutline-atomics']], @@ -100,7
> > +108,8 @@ machine_args_generic = [
> >  	['0xd09', ['-mcpu=cortex-a73']],
> >  	['0xd0a', ['-mcpu=cortex-a75']],
> >  	['0xd0b', ['-mcpu=cortex-a76']],
> > -	['0xd0c', ['-march=armv8.2-a+crypto', '-mcpu=neoverse-n1'],
> > flags_n1generic_extra]]
> > +	['0xd0c', ['-march=armv8.2-a+crypto', '-mcpu=neoverse-n1'],
> > flags_n1generic_extra],
> > +	['0xd49', ['-march=armv8.5-a+crypto+sve'], flags_n2generic_extra]]
> Should this be 'sve2'? There should be a flag to indicate SVE2.

Yes. N2 supports sve2 and sve2 is superset of sve.
I will do the change in next version.
> 
> >
> >  machine_args_cavium = [
> >  	['default', ['-march=armv8-a+crc+crypto','-mcpu=thunderx']],
> > --
> > 2.25.1


  reply	other threads:[~2021-01-11  3:01 UTC|newest]

Thread overview: 43+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-18 10:12 [dpdk-dev] [RFC PATCH] lpm: add sve support for lookup on Arm platform Ruifeng Wang
2021-01-05 15:44 ` Medvedkin, Vladimir
2021-01-06 10:11   ` Ruifeng Wang
2021-01-08  8:25 ` [dpdk-dev] [PATCH v2 0/5] lpm lookup with sve support Ruifeng Wang
2021-01-08  8:25   ` [dpdk-dev] [PATCH v2 1/5] lpm: add sve support for lookup on Arm platform Ruifeng Wang
2021-01-13 18:54     ` Medvedkin, Vladimir
2021-01-08  8:25   ` [dpdk-dev] [PATCH v2 2/5] net/hns3: fix build with sve enabled Ruifeng Wang
2021-01-09  0:06     ` Honnappa Nagarahalli
2021-01-09  2:11       ` oulijun
2021-01-11  2:39         ` Ruifeng Wang
2021-01-11 13:38           ` Honnappa Nagarahalli
2021-01-09  2:15     ` oulijun
2021-01-11  2:27       ` Ruifeng Wang
2021-01-08  8:25   ` [dpdk-dev] [PATCH v2 3/5] net/octeontx: " Ruifeng Wang
2021-01-08  8:25   ` [dpdk-dev] [PATCH v2 4/5] common/octeontx2: " Ruifeng Wang
2021-01-08 10:29     ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2021-01-11  9:51       ` Ruifeng Wang
2021-01-08  8:25   ` [dpdk-dev] [PATCH v2 5/5] config: add Arm Neoverse N2 Ruifeng Wang
2021-01-08 23:58     ` Honnappa Nagarahalli
2021-01-11  3:01       ` Ruifeng Wang [this message]
2021-01-11  3:09         ` Jerin Jacob
2021-01-11  8:32           ` Ruifeng Wang
2021-01-11 13:58             ` Honnappa Nagarahalli
2021-01-12  2:57 ` [dpdk-dev] [PATCH v3 0/5] lpm lookup with sve support Ruifeng Wang
2021-01-12  2:57   ` [dpdk-dev] [PATCH v3 1/5] lpm: add sve support for lookup on Arm platform Ruifeng Wang
2021-01-13 15:58     ` David Marchand
2021-01-27 13:04     ` David Marchand
2021-01-27 21:03       ` Honnappa Nagarahalli
2021-01-28  8:03         ` David Marchand
2021-01-28 12:24           ` Honnappa Nagarahalli
2021-01-28  5:47       ` Ruifeng Wang
2021-01-12  2:57   ` [dpdk-dev] [PATCH v3 2/5] net/hns3: fix build with sve enabled Ruifeng Wang
2021-01-13  2:16     ` Honnappa Nagarahalli
2021-01-12  2:57   ` [dpdk-dev] [PATCH v3 3/5] net/octeontx: " Ruifeng Wang
2021-01-12  4:39     ` Jerin Jacob
2021-01-12  2:57   ` [dpdk-dev] [PATCH v3 4/5] common/octeontx2: " Ruifeng Wang
2021-01-12  4:38     ` Jerin Jacob
2021-01-12  2:57   ` [dpdk-dev] [PATCH v3 5/5] config: add Arm Neoverse N2 Ruifeng Wang
2021-01-12  4:44     ` Jerin Jacob
2021-01-13  2:08     ` Honnappa Nagarahalli
2021-01-14 15:18   ` [dpdk-dev] [PATCH v3 0/5] lpm lookup with sve support David Marchand
2021-01-14 15:40     ` David Marchand
2021-01-15  7:02       ` Ruifeng Wang

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