From: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>
To: "yskoh@mellanox.com" <yskoh@mellanox.com>,
"jerinj@marvell.com" <jerinj@marvell.com>,
"thomas@monjalon.net" <thomas@monjalon.net>
Cc: "dev@dpdk.org" <dev@dpdk.org>,
"bruce.richardson@intel.com" <bruce.richardson@intel.com>,
"pbhagavatula@marvell.com" <pbhagavatula@marvell.com>,
"shahafs@mellanox.com" <shahafs@mellanox.com>,
"Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>,
"stable@dpdk.org" <stable@dpdk.org>,
Dharmik Thakkar <Dharmik.Thakkar@arm.com>,
Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
nd <nd@arm.com>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v3] build: disable armv8 crypto extension
Date: Mon, 13 May 2019 19:26:55 +0000 [thread overview]
Message-ID: <VE1PR08MB5149BA92DD6CCA07CA8842CD980F0@VE1PR08MB5149.eurprd08.prod.outlook.com> (raw)
Message-ID: <20190513192655.HEi00ViubTvJDnNcE_YEnDwDi6YEYVcqmCwzMDxNics@z> (raw)
In-Reply-To: <20190507211140.43569-1-yskoh@mellanox.com>
>
> Per armv8 crypto extension support, make build always enable it by default as
> long as compiler supports the feature while meson build only enables it for
> 'default' machine of generic armv8 architecture.
>
> It is known that not all the armv8 platforms have the crypto extension. For
> example, Mellanox BlueField has a variant which doesn't have it. If crypto
> enabled binary runs on such a platform, rte_eal_init() fails.
>
> '+crypto' flag currently implies only '+aes' and '+sha2' and enabling it will
> generate the crypto instructions only when crypto intrinsics are used.
> For the devices supporting 8.2 crypto or newer, compiler could generate such
> instructions beyond intrinsics or asm code. For example, compiler can generate
> 3-way exclusive OR instructions if sha3 is supported. However, it has to be
> enabled by adding '+sha3' as of today.
>
> In DPDK, armv8 cryptodev is the only one which requires the crypto support.
> As it even uses external library of Marvell which is compiled out of DPDK with
> crypto support and there's run-time check for required cpuflags, crypto
> support can be disabled in DPDK.
>
> Cc: stable@dpdk.org
>
> Signed-off-by: Yongseok Koh <yskoh@mellanox.com>
> Acked-by: Jerin Jacob <jerinj@marvell.com>
> Tested-by: Dharmik Thakkar <dharmik.thakkar@arm.com>
> ---
>
> v3:
> * announce removal of the flag in release note
>
> v2:
> * disable crypto support instead of having a build config
>
> config/arm/meson.build | 2 +-
> doc/guides/rel_notes/release_19_05.rst | 2 ++
> mk/machine/armv8a/rte.vars.mk | 2 +-
> 3 files changed, 4 insertions(+), 2 deletions(-)
>
> diff --git a/config/arm/meson.build b/config/arm/meson.build index
> 7fa6ed3105..abc8cf346c 100644
> --- a/config/arm/meson.build
> +++ b/config/arm/meson.build
> @@ -74,7 +74,7 @@ flags_octeontx2_extra = [
> ['RTE_USE_C11_MEM_MODEL', true]]
>
> machine_args_generic = [
> - ['default', ['-march=armv8-a+crc+crypto']],
> + ['default', ['-march=armv8-a+crc']],
> ['native', ['-march=native']],
> ['0xd03', ['-mcpu=cortex-a53']],
> ['0xd04', ['-mcpu=cortex-a35']],
> diff --git a/doc/guides/rel_notes/release_19_05.rst
> b/doc/guides/rel_notes/release_19_05.rst
> index 5044ac7df1..0d35f25094 100644
> --- a/doc/guides/rel_notes/release_19_05.rst
> +++ b/doc/guides/rel_notes/release_19_05.rst
> @@ -234,6 +234,8 @@ Removed Items
> Also, make sure to start the actual text at the margin.
> =========================================================
>
> +* build: armv8 crypto extension is disabled.
> +
>
> API Changes
> -----------
> diff --git a/mk/machine/armv8a/rte.vars.mk
> b/mk/machine/armv8a/rte.vars.mk index 8252efbb7b..5e3ffc3adf 100644
> --- a/mk/machine/armv8a/rte.vars.mk
> +++ b/mk/machine/armv8a/rte.vars.mk
> @@ -28,4 +28,4 @@
> # CPU_LDFLAGS =
> # CPU_ASFLAGS =
>
> -MACHINE_CFLAGS += -march=armv8-a+crc+crypto
> +MACHINE_CFLAGS += -march=armv8-a+crc
> --
> 2.21.0
Reviewed-by: Honnappa Nagarahalli <honnappa.nagarahalli@arm.com>
next prev parent reply other threads:[~2019-05-13 19:26 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-05-02 1:58 [dpdk-dev] [PATCH 1/2] build: add option for " Yongseok Koh
2019-05-02 1:58 ` Yongseok Koh
2019-05-02 1:58 ` [dpdk-dev] [PATCH 2/2] mk: disable armv8 crypto extension for Mellanox BlueField Yongseok Koh
2019-05-02 1:58 ` Yongseok Koh
2019-05-02 4:12 ` Honnappa Nagarahalli
2019-05-02 4:12 ` Honnappa Nagarahalli
2019-05-02 5:40 ` Yongseok Koh
2019-05-02 5:40 ` Yongseok Koh
2019-05-03 4:01 ` Honnappa Nagarahalli
2019-05-03 4:01 ` Honnappa Nagarahalli
2019-05-02 4:13 ` [dpdk-dev] [PATCH 1/2] build: add option for armv8 crypto extension Honnappa Nagarahalli
2019-05-02 4:13 ` Honnappa Nagarahalli
2019-05-02 5:46 ` Yongseok Koh
2019-05-02 5:46 ` Yongseok Koh
2019-05-02 10:00 ` Jerin Jacob Kollanukkaran
2019-05-02 10:00 ` Jerin Jacob Kollanukkaran
2019-05-03 3:57 ` Honnappa Nagarahalli
2019-05-03 3:57 ` Honnappa Nagarahalli
2019-05-03 9:57 ` Yongseok Koh
2019-05-03 9:57 ` Yongseok Koh
2019-05-03 12:28 ` [dpdk-dev] [PATCH v2] build: disable " Yongseok Koh
2019-05-03 12:28 ` Yongseok Koh
2019-05-03 15:02 ` Honnappa Nagarahalli
2019-05-03 15:02 ` Honnappa Nagarahalli
2019-05-03 16:10 ` Honnappa Nagarahalli
2019-05-03 16:10 ` Honnappa Nagarahalli
2019-05-03 17:50 ` Yongseok Koh
2019-05-03 17:50 ` Yongseok Koh
2019-05-06 21:46 ` [dpdk-dev] [dpdk-stable] " Yongseok Koh
2019-05-06 21:46 ` Yongseok Koh
2019-05-07 7:59 ` Jerin Jacob Kollanukkaran
2019-05-07 7:59 ` Jerin Jacob Kollanukkaran
2019-05-07 11:03 ` Honnappa Nagarahalli
2019-05-07 11:03 ` Honnappa Nagarahalli
2019-05-07 12:02 ` Jerin Jacob Kollanukkaran
2019-05-07 12:02 ` Jerin Jacob Kollanukkaran
2019-05-03 22:13 ` [dpdk-dev] " Dharmik Thakkar
2019-05-03 22:13 ` Dharmik Thakkar
2019-05-06 21:41 ` Yongseok Koh
2019-05-06 21:41 ` Yongseok Koh
2019-05-07 21:11 ` [dpdk-dev] [PATCH v3] " Yongseok Koh
2019-05-07 21:11 ` Yongseok Koh
2019-05-13 19:26 ` Honnappa Nagarahalli [this message]
2019-05-13 19:26 ` Honnappa Nagarahalli
2019-06-03 23:11 ` Thomas Monjalon
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