linux-kernel - Re: Query about IPI as NMI (pseudo-NMI) support patches

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Message-ID: <86zgb07tfs.wl-maz@kernel.org>
Date:   Mon, 02 Jan 2023 17:11:19 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Mukesh Ojha <quic_mojha@...cinc.com>
Cc:     lkml <linux-kernel@...r.kernel.org>
Subject: Re: Query about IPI as NMI (pseudo-NMI) support patches

Hi Mukesh,

On Mon, 02 Jan 2023 16:44:59 +0000,
Mukesh Ojha <quic_mojha@...cinc.com> wrote:
> 
> Hi Marc,
> 
> I was looking similar support mentioned in below patch series.
> 
> https://lore.kernel.org/lkml/CAFA6WYO0+LQ=mB1spCstt0cNZ0G+sZu_+Wrv6BKSeXqF5SRq4A@mail.gmail.com/#t
> 
> Wanted to check if there is chance of these patches to land in
> mainline ?

I certainly have no intention to merge it as is, specially as there is
no good usage model for it other than "but think of debug!".

We have exactly *one* SGI left. If we are going to lose it over such a
feature, I'd want a description of how we are going to share it
between potential users, and how we claw some currently used SGIs
back.

Until then, this is a proof of concept, and not much else.

Thanks,

	M.

-- 
Without deviation from the norm, progress is not possible.