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From: Pavan Nikhilesh Bhagavatula <pbhagavatula@marvell.com>
To: Honnappa Nagarahalli <Honnappa.Nagarahalli@arm.com>,
	"thomas@monjalon.net" <thomas@monjalon.net>
Cc: Jerin Jacob Kollanukkaran <jerinj@marvell.com>,
	"juraj.linkes@pantheon.tech" <juraj.linkes@pantheon.tech>,
	Jan Viktorin <viktorin@rehivetech.com>,
	Ruifeng Wang <Ruifeng.Wang@arm.com>,
	Bruce Richardson <bruce.richardson@intel.com>,
	"dev@dpdk.org" <dev@dpdk.org>, nd <nd@arm.com>, nd <nd@arm.com>
Subject: Re: [dpdk-dev] [EXT] Re: [PATCH] config/arm: add ability to express arch extensions
Date: Tue, 11 May 2021 08:57:11 +0000	[thread overview]
Message-ID: <PH0PR18MB4086F9796C413A0322B79F1DDE539@PH0PR18MB4086.namprd18.prod.outlook.com> (raw)
In-Reply-To: <DBAPR08MB581470079ED4BC30D3872B5598549@DBAPR08MB5814.eurprd08.prod.outlook.com>

>
><snip>
>>
>> >
>> > The patch still holds true for CRC though as it is listed separately
>> > below
>> > https://urldefense.proofpoint.com/v2/url?u=https-
>3A__developer.arm.com_architectures_cpu-2Darchitecture_a-
>2D&d=DwIFAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=E3SgYMjtKCMVsB-
>fmvgGV3o-
>g_fjLhk5Pupi9ijohpc&m=i3kC8htMiHjXMoJWUn6QlDVZQCblbFrIJyMcW
>d9nAmM&s=fA4SM6O3iC2HXIK1qSbOHzxVeHoYqcfUebEOwioHC7c&e=
>> > profile/exploration-tools/feature-names-for-a-profile
>CRC is mandatory starting in V8.1, refer to Arm-ARM document.
>
>> >
>> > Also, looks like sve2 support in n2 core might be optional as per
>above doc?
>> I need to check on this. Some of the info here might not be public yet.
>I found [1]. SVE2 is mandatory feature.
>

I see thanks for the info I will remove extension from cnxk.

Do you think the extension infra is still useful for other cases? i.e. older 
cores or cases where vendor wants to enable some extensions by default?

I found a document[1] which describes about extensions not enabled by default but supported by a given march.
In case of n2 I think memory tagging is one such feature

[1]https://developer.arm.com/tools-and-software/open-source-software/developer-tools/gnu-toolchain/architecture-support


>[1] https://urldefense.proofpoint.com/v2/url?u=https-
>3A__developer.arm.com_ip-
>2Dproducts_processors_neoverse_neoverse-
>2Dn2&d=DwIFAg&c=nKjWec2b6R0mOyPaz7xtfQ&r=E3SgYMjtKCMVsB-
>fmvgGV3o-
>g_fjLhk5Pupi9ijohpc&m=i3kC8htMiHjXMoJWUn6QlDVZQCblbFrIJyMcW
>d9nAmM&s=kP_X-Co0cl4pZ64BZqy5rAFUlkMZE-3EhTVBabm3SW8&e=
>
><snip>

  reply	other threads:[~2021-05-11  8:57 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-05-05 12:14 [dpdk-dev] [PATCH] config/arm: add ability to express arch extensions pbhagavatula
2021-05-05 12:27 ` Jerin Jacob
2021-05-10 13:13 ` Thomas Monjalon
2021-05-10 17:05   ` [dpdk-dev] [EXT] " Pavan Nikhilesh Bhagavatula
2021-05-10 17:20     ` Honnappa Nagarahalli
2021-05-10 17:48       ` Pavan Nikhilesh Bhagavatula
2021-05-10 21:09         ` Honnappa Nagarahalli
2021-05-10 21:28           ` Honnappa Nagarahalli
2021-05-11  8:57             ` Pavan Nikhilesh Bhagavatula [this message]
2021-05-11 17:08               ` Honnappa Nagarahalli
2021-05-11 18:50                 ` Pavan Nikhilesh Bhagavatula
2021-05-11 19:42                   ` Honnappa Nagarahalli
2021-05-12  9:17                     ` Pavan Nikhilesh Bhagavatula
2021-05-12  9:31                       ` Bruce Richardson
2021-05-14 11:45                         ` Juraj Linkeš
2021-05-18 13:20                           ` Honnappa Nagarahalli
2021-07-24  8:51                             ` Thomas Monjalon
2021-07-27 13:04                               ` Juraj Linkeš
2021-07-29 18:24                                 ` Pavan Nikhilesh Bhagavatula
2021-05-14 11:19                       ` Juraj Linkeš

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