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Re: [PATCH V3 1/2] xen: Update dm_op.h from Xen public header
- To: Viresh Kumar <viresh.kumar@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 25 Jul 2023 09:49:51 +0200
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- Cc: Vincent Guittot <vincent.guittot@xxxxxxxxxx>, Alex Bennée <alex.bennee@xxxxxxxxxx>, stratos-dev@xxxxxxxxxxxxxxxxxxx, Erik Schilling <erik.schilling@xxxxxxxxxx>, Manos Pitsidianakis <manos.pitsidianakis@xxxxxxxxxx>, Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
- Delivery-date: Tue, 25 Jul 2023 07:50:06 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 25.07.2023 09:42, Viresh Kumar wrote:
> On 25-07-23, 09:18, Jan Beulich wrote:
>> I question that use, btw, but it is not up to me to decide whether to
>> accept such a layering violation in Linux. dm-op is, as its name says,
>> for device models to use. Your intended use doesn't fall in that
>> category, aiui. Imo the present contents of dm_op.h in Linux is indeed
>> all a kernel is supposed to know about, unless it was to gain in-kernel
>> device models.
>
> Is there any other way by which an interrupt can be raised for the
> guest VM ? I was only aware of this method and so implemented it like
> this.
>
> I am open to suggestions on this.
Well. I don't know your requirements. Generally I would suggest using
event channels, not interrupts, when talking about injecting events
into guests. If it strictly needs to be an interrupt, then I guess a
non-dm-op means would need introducing if none already exists.
Jan
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