linux-kernel - Re: [PATCH v2 0/5] drm/xe: enable driver usage on non-4KiB kernels

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Message-ID: <4cfbde5a-5bbe-462c-a52c-fe1c65aa3815@hogyros.de>
Date: Mon, 16 Jun 2025 14:53:35 +0900
From: Simon Richter <Simon.Richter@...yros.de>
To: jeffbai@...c.io, Lucas De Marchi <lucas.demarchi@...el.com>,
 Thomas Hellström <thomas.hellstrom@...ux.intel.com>,
 Rodrigo Vivi <rodrigo.vivi@...el.com>, David Airlie <airlied@...il.com>,
 Simona Vetter <simona@...ll.ch>, Francois Dugast
 <francois.dugast@...el.com>,
 Zbigniew Kempczyński <zbigniew.kempczynski@...el.com>,
 José Roberto de Souza <jose.souza@...el.com>,
 Mauro Carvalho Chehab <mauro.chehab@...ux.intel.com>,
 Matthew Brost <matthew.brost@...el.com>,
 Zhanjun Dong <zhanjun.dong@...el.com>, Matt Roper
 <matthew.d.roper@...el.com>, Alan Previn
 <alan.previn.teres.alexis@...el.com>,
 Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
 Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
 Mateusz Naklicki <mateusz.naklicki@...el.com>
Cc: intel-xe@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
 linux-kernel@...r.kernel.org, stable@...r.kernel.org,
 Kexy Biscuit <kexybiscuit@...c.io>, Shang Yatsen <429839446@...com>,
 Wenbin Fang <fangwenbin@....qq.com>, Haien Liang <27873200@...com>,
 Jianfeng Liu <liujianfeng1994@...il.com>, Shirong Liu <lsr1024@...com>,
 Haofeng Wu <s2600cw2@....com>
Subject: Re: [PATCH v2 0/5] drm/xe: enable driver usage on non-4KiB kernels

Hi,

On 6/13/25 10:11, Mingcong Bai via B4 Relay wrote:

> This patch series attempts to enable the use of xe DRM driver on non-4KiB
> kernel page platforms. This involves fixing the ttm/bo interface, as well
> as parts of the userspace API to make use of kernel `PAGE_SIZE' for
> alignment instead of the assumed `SZ_4K', it also fixes incorrect usage of
> `PAGE_SIZE' in the GuC and ring buffer interface code to make sure all
> instructions/commands were aligned to 4KiB barriers (per the Programmer's
> Manual for the GPUs covered by this DRM driver).

Tested on POWER9 (TalosII) with B580, comparing commit b8f759deb9 with 
4k pages with the same plus these patches with 64k pages. I did not test 
4k pages with these patches, I suspect that is already well covered by CI.

The Piglit test suite reports the exact same number of pass/fail/crash 
for both configurations.

https://gitlab.freedesktop.org/drm/xe/kernel/-/issues/1310#note_2959331

Are there other tests that make sense? Piglit does not include video 
playback, for example. Since I have a dGPU, I can't run SR-IOV tests, 
though.

    Simon