linux-kernel - Re: [PATCH v4 1/2] iommu/io-pgtable-arm: Add way to debug pgtable walk

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Date: Thu, 13 Jun 2024 11:10:34 +0200
From: Joerg Roedel <joro@...tes.org>
To: Rob Clark <robdclark@...il.com>
Cc: dri-devel@...ts.freedesktop.org, linux-arm-msm@...r.kernel.org,
	freedreno@...ts.freedesktop.org, Will Deacon <will@...nel.org>,
	Rob Clark <robdclark@...omium.org>,
	Robin Murphy <robin.murphy@....com>, Jason Gunthorpe <jgg@...pe.ca>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	Kevin Tian <kevin.tian@...el.com>,
	Joao Martins <joao.m.martins@...cle.com>,
	"moderated list:ARM SMMU DRIVERS" <linux-arm-kernel@...ts.infradead.org>,
	"open list:IOMMU SUBSYSTEM" <iommu@...ts.linux.dev>,
	open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] iommu/io-pgtable-arm: Add way to debug pgtable
 walk

On Thu, May 23, 2024 at 10:52:21AM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@...omium.org>
> 
> Add an io-pgtable method to walk the pgtable returning the raw PTEs that
> would be traversed for a given iova access.
> 
> Signed-off-by: Rob Clark <robdclark@...omium.org>
> ---
>  drivers/iommu/io-pgtable-arm.c | 51 ++++++++++++++++++++++++++++------
>  include/linux/io-pgtable.h     |  4 +++
>  2 files changed, 46 insertions(+), 9 deletions(-)

Acked-by: Joerg Roedel <jroedel@...e.de>