linux-kernel - Re: [PATCH v10 0/4] io-pgtable-arm + drm/msm: Extend iova fault debugging

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Message-ID: <20241210111450.GA14735@willie-the-truck>
Date: Tue, 10 Dec 2024 11:14:51 +0000
From: Will Deacon <will@...nel.org>
To: Rob Clark <robdclark@...il.com>
Cc: iommu@...ts.linux.dev, linux-arm-msm@...r.kernel.org,
	freedreno@...ts.freedesktop.org,
	Robin Murphy <robin.murphy@....com>,
	Mostafa Saleh <smostafa@...gle.com>,
	Rob Clark <robdclark@...omium.org>,
	Boris Brezillon <boris.brezillon@...labora.com>,
	"open list:DRM DRIVER for Qualcomm Adreno GPUs" <dri-devel@...ts.freedesktop.org>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Joao Martins <joao.m.martins@...cle.com>,
	Joerg Roedel <jroedel@...e.de>,
	Konrad Dybcio <konradybcio@...nel.org>,
	"moderated list:ARM SMMU DRIVERS" <linux-arm-kernel@...ts.infradead.org>,
	open list <linux-kernel@...r.kernel.org>,
	"open list:POWER MANAGEMENT CORE" <linux-pm@...r.kernel.org>,
	Marijn Suijten <marijn.suijten@...ainline.org>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	Sean Paul <sean@...rly.run>, Steven Price <steven.price@....com>
Subject: Re: [PATCH v10 0/4] io-pgtable-arm + drm/msm: Extend iova fault
 debugging

Hi Rob,

On Mon, Oct 28, 2024 at 02:31:36PM -0700, Rob Clark wrote:
> From: Rob Clark <robdclark@...omium.org>
> 
> This series extends io-pgtable-arm with a method to retrieve the page
> table entries traversed in the process of address translation, and then
> beefs up drm/msm gpu devcore dump to include this (and additional info)
> in the devcore dump.
> 
> This is a respin of https://patchwork.freedesktop.org/series/94968/
> (minus a patch that was already merged)
> 
> v2:  Fix an armv7/32b build error in the last patch
> v3:  Incorperate Will Deacon's suggestion to make the interface
>      callback based.
> v4:  Actually wire up the callback
> v5:  Drop the callback approach
> v6:  Make walk-data struct pgtable specific and rename
>      io_pgtable_walk_data to arm_lpae_io_pgtable_walk_data
> v7:  Re-use the pgtable walker added for arm_lpae_read_and_clear_dirty()
> v8:  Pass pte pointer to callback so it can modify the actual pte
> v9:  Fix selftests_running case
> v10: Call visit cb for all nodes traversed, leave the decision about
>      whether to care about non-leaf nodes to the callback

Do you plan to respin this? I see Mostafa left a proposal on patch 3.

Thanks,

Will