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Re: [PATCH v3 6/7] x86/time: introduce command line option to select wallclock
- To: Roger Pau Monne <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 3 Sep 2024 17:37:20 +0200
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- Cc: "Daniel P. Smith" <dpsmith@xxxxxxxxxxxxxxxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 03 Sep 2024 15:37:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 03.09.2024 15:03, Roger Pau Monne wrote:
> --- a/docs/misc/xen-command-line.pandoc
> +++ b/docs/misc/xen-command-line.pandoc
> @@ -2821,6 +2821,24 @@ vwfi to `native` reduces irq latency significantly. It
> can also lead to
> suboptimal scheduling decisions, but only when the system is
> oversubscribed (i.e., in total there are more vCPUs than pCPUs).
>
> +### wallclock (x86)
> +> `= auto | xen | cmos | efi`
> +
> +> Default: `auto`
> +
> +Allow forcing the usage of a specific wallclock source.
> +
> + * `auto` let the hypervisor select the clocksource based on internal
> + heuristics.
> +
> + * `xen` force usage of the Xen shared_info wallclock when booted as a Xen
> + guest.
Mention the CONFIG_* dependency, like we do elsewhere?
> + * `cmos` force usage of the CMOS RTC wallclock.
> +
> + * `efi` force usage of the EFI_GFET_TIME run-time method when booted from
> EFI
> + firmware.
Nit: Stray F.
Jan
|
