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From: Yongseok Koh <yskoh@mellanox.com>
To: Dharmik Thakkar <Dharmik.Thakkar@arm.com>
Cc: "jerinj@marvell.com" <jerinj@marvell.com>,
	Thomas Monjalon <thomas@monjalon.net>,
	"dev@dpdk.org" <dev@dpdk.org>,
	Bruce Richardson <bruce.richardson@intel.com>,
	"pbhagavatula@marvell.com" <pbhagavatula@marvell.com>,
	Shahaf Shuler <shahafs@mellanox.com>,
	"Gavin Hu (Arm Technology China)" <Gavin.Hu@arm.com>,
	Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	"stable@dpdk.org" <stable@dpdk.org>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [PATCH v2] build: disable armv8 crypto extension
Date: Mon, 6 May 2019 21:41:41 +0000	[thread overview]
Message-ID: <3D5B80A6-053E-49DD-B9D1-A9F91494A17F@mellanox.com> (raw)
Message-ID: <20190506214141.u_naa3g-CztTRbz6wCvFBeVkdQ2O4890-E98T8bAfhg@z> (raw)
In-Reply-To: <7A975220-1C36-43ED-8862-2F1119FE785C@arm.com>


> On May 3, 2019, at 3:13 PM, Dharmik Thakkar <Dharmik.Thakkar@arm.com> wrote:
> 
> Hi Yongseok,
> Thank you for the patch! I have tested it on Bluefield reference platform. It works fine. 

Thanks for your testing.

> One observation:
> Even though I used 'make config T=arm64-bluefield-linuxapp-gcc’,
> at the end of the build process it said 'Build complete [arm64-armv8a-linuxapp-gcc]’

The BlueField config stems from armv8a.
Unlike Cavium hosts, RTE_MACHINE is still armv8a.
Looks it is same for Broadcom's Stingray.

> Tested-by: Dharmik Thakkar <dharmik.thakkar@arm.com>
> 
>> On May 3, 2019, at 7:28 AM, Yongseok Koh <yskoh@mellanox.com> wrote:
>> 
>> 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>
>> ---
>> 
>> v2:
>> * disable crypto support instead of having a build config
>> 
>> config/arm/meson.build        | 2 +-
>> mk/machine/armv8a/rte.vars.mk | 2 +-
>> 2 files changed, 2 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/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
>> -- 
>> 2.11.0
>> 
> 


  parent reply	other threads:[~2019-05-06 21:41 UTC|newest]

Thread overview: 47+ 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 [this message]
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
2019-05-13 19:26     ` Honnappa Nagarahalli
2019-06-03 23:11     ` Thomas Monjalon
2019-05-03 16:06 [dpdk-dev] [PATCH v2] " Jerin Jacob Kollanukkaran
2019-05-03 16:06 ` Jerin Jacob Kollanukkaran

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