Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) client-ip=23.128.96.35;
Date:   Fri, 29 Sep 2023 14:11:23 +0100
Message-ID: <87a5t5m8ec.wl-maz@kernel.org>
From:   Marc Zyngier <maz@kernel.org>
To:     Sebastian Ene <sebastianene@google.com>
Cc:     linux-kernel@vger.kernel.org, kernel-team@android.com,
        will@kernel.org, ryan.roberts@arm.com, mark.rutland@arm.com,
        vdonnefort@google.com
Subject: Re: [PATCH 00/11] arm64: ptdump: View the host stage-2 page-tables
In-Reply-To: <20230927112517.2631674-1-sebastianene@google.com>
References: <20230927112517.2631674-1-sebastianene@google.com>
User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue)
 FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/28.2
 (x86_64-pc-linux-gnu) MULE/6.0 (HANACHIRUSATO)
MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue")
Content-Type: text/plain; charset=US-ASCII
Precedence: bulk

Hi Sebastian,

On Wed, 27 Sep 2023 12:25:06 +0100,
Sebastian Ene <sebastianene@google.com> wrote:
> 
> Hi,
> 
> This can be used as a debugging tool for dumping the host stage-2
> page-tables under pKVM envinronment.

Why only pKVM? Why only the host? Dumping page tables shouldn't be
reserved to this corner case. Specially considering that pKVM is still
really far away from being remotely useful upstream.

I'd really expect this sort of debugging information to be fully
available for both host and guest, for all modes (nVHE, VHE, hVHE,
protected, nested), without limitations other than the configuration
option.

Also, please Cc the relevant parties (I'm the only one Cc'd on the KVM
side...)

Thanks,

	M.

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