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Re: [Xen-devel] [PATCH v2 26/41] arm : acpi add xen environment table
- To: "Stefano Stabellini" <stefano.stabellini@xxxxxxxxxxxxx>
- From: "Jan Beulich" <JBeulich@xxxxxxxx>
- Date: Thu, 28 May 2015 13:07:08 +0100
- Cc: keir@xxxxxxx, ian.campbell@xxxxxxxxxx, andrew.cooper3@xxxxxxxxxx, tim@xxxxxxx, xen-devel@xxxxxxxxxxxxx, Julien Grall <julien.grall@xxxxxxxxxx>, Stefano.Stabellini@xxxxxxxxxx, Parth Dixit <parth.dixit@xxxxxxxxxx>, christoffer.dall@xxxxxxxxxx
- Delivery-date: Thu, 28 May 2015 12:07:30 +0000
- List-id: Xen developer discussion <xen-devel.lists.xen.org>
>>> On 28.05.15 at 12:58, <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> Let's take a closer look at this table. After the boilierplate, these
> are the interesting fields:
>
> GNT Start, GNT Size
> Evtchn Intr, Evtchn Intr Flags
>
> After the table, it is clearly stated:
>
> "The Grant Table region is optional."
>
> and
>
> "The Event Channel Interrupt is optional."
>
> So I think there is no problem: we don't want to pass any info in that
> table? Sure, let's not pass any. We can still use it to flag the
> presence of Xen on the platform.
Even more so a reason to use what base ACPI has, without any
custom table.
Jan
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