All of lore.kernel.org
 help / color / mirror / Atom feed
From: Jan Beulich <jbeulich@suse.com>
To: Luca Fancellu <luca.fancellu@arm.com>
Cc: bertrand.marquis@arm.com, wei.chen@arm.com,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	George Dunlap <george.dunlap@citrix.com>,
	Julien Grall <julien@xen.org>,
	Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wl@xen.org>,
	Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>,
	xen-devel@lists.xenproject.org
Subject: Re: [PATCH v3 06/10] xen/arm: enable Dom0 to use SVE feature
Date: Mon, 20 Mar 2023 10:13:23 +0100	[thread overview]
Message-ID: <bfe68fee-dc22-dcf4-c4fa-d30ddc95718e@suse.com> (raw)
In-Reply-To: <20230317131949.4031014-7-luca.fancellu@arm.com>

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


  reply	other threads:[~2023-03-20  9:13 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-17 13:19 [PATCH v3 00/10] SVE feature for arm guests Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 01/10] xen/arm: enable SVE extension for Xen Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 02/10] xen/arm: add SVE vector length field to the domain Luca Fancellu
2023-03-20  9:09   ` Jan Beulich
2023-03-22  7:07     ` Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 03/10] xen/arm: Expose SVE feature to the guest Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 04/10] xen/arm: add SVE exception class handling Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 05/10] arm/sve: save/restore SVE context switch Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 06/10] xen/arm: enable Dom0 to use SVE feature Luca Fancellu
2023-03-20  9:13   ` Jan Beulich [this message]
2023-03-22  7:32     ` Luca Fancellu
2023-03-22  7:51       ` Jan Beulich
2023-03-17 13:19 ` [PATCH v3 07/10] xen/physinfo: encode Arm SVE vector length in arch_capabilities Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 08/10] tools: add physinfo arch_capabilities handling for Arm Luca Fancellu
2023-03-20 10:30   ` George Dunlap
2023-03-20 11:01   ` Christian Lindig
2023-03-22  7:02     ` Luca Fancellu
2023-03-22  8:47       ` Christian Lindig
2023-03-17 13:19 ` [PATCH v3 09/10] xen/tools: add sve parameter in XL configuration Luca Fancellu
2023-03-17 13:19 ` [PATCH v3 10/10] xen/arm: add sve property for dom0less domUs Luca Fancellu

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=bfe68fee-dc22-dcf4-c4fa-d30ddc95718e@suse.com \
    --to=jbeulich@suse.com \
    --cc=Volodymyr_Babchuk@epam.com \
    --cc=andrew.cooper3@citrix.com \
    --cc=bertrand.marquis@arm.com \
    --cc=george.dunlap@citrix.com \
    --cc=julien@xen.org \
    --cc=luca.fancellu@arm.com \
    --cc=sstabellini@kernel.org \
    --cc=wei.chen@arm.com \
    --cc=wl@xen.org \
    --cc=xen-devel@lists.xenproject.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.