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CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(4636009)(396003)(376002)(346002)(39850400004)(136003)(46966005)(336012)(54906003)(5660300002)(82310400003)(2906002)(4326008)(316002)(70586007)(9686003)(83380400001)(55016002)(70206006)(86362001)(8936002)(478600001)(356005)(83080400001)(966005)(7696005)(33656002)(8676002)(53546011)(47076004)(81166007)(26005)(186003)(110136005)(82740400003)(52536014)(6506007); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 08 Oct 2020 04:40:48.8437 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 945456ba-364f-4688-307c-08d86b445442 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB5EUR03FT003.eop-EUR03.prod.protection.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR0801MB1930 Subject: Re: [dpdk-stable] [19.11] [PATCH 1/1] config: add Graviton2(arm64) defconfig X-BeenThere: stable@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: patches for DPDK stable branches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: stable-bounces@dpdk.org Sender: "stable" >=20 > On 10/7/20 2:18 AM, Luca Boccassi wrote: > > > > On Tue, 2020-10-06 at 11:44 -0700, Vimal Chungath wrote: > >> On 10/6/20 1:12 AM, Luca Boccassi wrote: > >>> > >>> On Mon, 2020-10-05 at 11:50 -0700, Vimal Chungath wrote: > >>>> This patch adds make build configuration for AWS Graviton2 platform > >>>> based on ARM Neoverse N1. Meson build works but uses configuration > >>>> for > >>>> N1 SDP that is not optimal. Rework in meson build system for ARM > >>>> SoCs is planned so I have chosen not to add meson configuration for > >>>> this > >>>> 19.11 patch. > >>>> > >>>> Vimal Chungath (1): > >>>> config: add Graviton2(arm64) defconfig > >>>> > >>>> config/defconfig_arm64-graviton2-linux-gcc | 1 + > >>>> config/defconfig_arm64-graviton2-linuxapp-gcc | 13 +++++++++++ > >>>> config/defconfig_graviton2 | 1 + > >>>> mk/machine/graviton2/rte.vars.mk | 33 > +++++++++++++++++++++++++++ > >>>> 4 files changed, 48 insertions(+) > >>>> create mode 120000 config/defconfig_arm64-graviton2-linux-gcc > >>>> create mode 100644 config/defconfig_arm64-graviton2-linuxapp-gcc > >>>> create mode 120000 config/defconfig_graviton2 create mode 100644 > >>>> mk/machine/graviton2/rte.vars.mk > >>> > >>> Hi, > >>> > >>> Is this adding support for a new driver for 19.11? I don't see it in > >>> the main branch? > >> > >> Hi Luca, > >> > >> This patch is adding optimal build flags for Graviton2 SoC. > >> No new driver is being added. Main branch is no longer accepting make > >> build patches as it is deprecated. For 19.11, I assume make is still t= he > default. > >> > >> This is the meson patch in review for main branch: > >> https://patches.dpdk.org/patch/76981/ > >> > >> Regards, > >> Vimal > > > > I see - normally we are careful with new feature/support in LTS > > branches, but this seems self-contained enough to be very low risk so > > it seems acceptable to me. But Meson is fully supported, so please > > update the patchset so that it applies to both build systems. >=20 > Meson build works as Neoverse N1 configuration already exists so I chose = to > not add an explicit patch for it. > Unfortunately, getting meson to choose the same flags as make is currentl= y > not possible as meson does not accept choosing the exact Arm SoC. More > details in the patchwork link above. > Meson rework is being planned on main branch to bridge this gap but I'm n= ot > sure if it will be backported to 19.11. > Honnappa, let us know what you think? I would like to backport the Arm related changes to meson build. If for any= reason, we cannot backport, I am ok to change the N1 configuration to supp= ort Graviton2 for stable releases. >=20 > > > > -- > > Kind regards, > > Luca Boccassi