[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [PATCH v3 06/10] xen/arm: enable Dom0 to use SVE feature
- To: Luca Fancellu <luca.fancellu@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 20 Mar 2023 10:13:23 +0100
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=suse.com; dmarc=pass action=none header.from=suse.com; dkim=pass header.d=suse.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=rrUxzXV+t7HTO0ZihCi4ZmO2sYxa1tTkGYaNHBQvbEE=; b=dW/9216O+WjetjlU6nA1XGwgQRtZ9BVNKQl+bzCWaAwxnQPIY54FFXBvj4WYAnjIjbYuuEP1TJahr7T3SEAyLzFyXjaYxPRP76eyzeAid9XxV6WfTm76VsmBjlgpYfwxhabyUQghO3LuX2ivzACo5Xc3FZDOLWd/Ixvft3HbMWTPToiDWecZP8Z/ioV5/IY6FCHtz3fXbmwhkL0IKB8D4ZxcLeueM4HiLb1FLh/yajCXEM/2+bCNKm9DGF0URhhnAX4PxKh8CC6qWwj60xPu2G/UIf1IfXOLDtZ8sZ/vyzjksw6S/7wAKe3/DODfcBNbxnd9Ai+Kj7eH13GCsl4Fow==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=Oign8SiP7/ak1FrFl4wXxrytxu/OrIj3AVgEglzD67oc67i4i/VZg7nrKG55oUnU7kyIMr2UQi88xb4b85DUT3ypO8xLcy1LPsXe6uNyY0mJhMqZ/FiRAakeNpB3oCyYPVYyHTkCvBAVJuAWPK1V7kH7uHTbavDBBOBLdU1l08MRZkU6r4yIQcFsj7g6fuFWxfloyB2C3jfRaMIv9lr6LoUqNzVspmdQAIHkJUdozCJsUmQ0uZkgQM4Pkr0wmaTsMeYASMGAduE8jo7bYyXMCyV9aUfqreYFQK/7wXBE2RPYKEwmaW1/GvlbCKwYimKklqQOOFsFDK99H56VhlR1Bg==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=suse.com;
- Cc: bertrand.marquis@xxxxxxx, wei.chen@xxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 20 Mar 2023 09:13:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 17.03.2023 14:19, Luca Fancellu wrote:
> --- a/docs/misc/xen-command-line.pandoc
> +++ b/docs/misc/xen-command-line.pandoc
> @@ -1005,6 +1005,19 @@ restrictions set up here. Note that the values to be
> specified here are
> ACPI PXM ones, not Xen internal node numbers. `relaxed` sets up vCPU
> affinities to prefer but be not limited to the specified node(s).
>
> +### dom0_sve (arm)
> +> `= <integer>`
> +
> +> Default: `0`
> +
> +Enable arm SVE usage for Dom0 domain and sets the maximum SVE vector length.
> +Values above 0 means feature is enabled for Dom0, otherwise feature is
> disabled.
> +Possible values are from 0 to maximum 2048, being multiple of 128, that will
> be
> +the maximum vector length.
> +Please note that the platform can supports a lower value, if the requested
> value
> +is above the supported one, the domain creation will fail and the system will
> +stop.
> +
> ### dom0_vcpus_pin
> > `= <boolean>`
I'd like to raise the question of proliferation of top-level command
line options controlling Dom0. In x86 we've specifically started to use
"dom0=" as the one top-level option where almost all new controls should
be added as sub-options.
_If_ a top-level option is indeed preferred, then please avoid the use
of an underscore in its name, when a dash does fine.
Jan
|
